Consulta: subjectFacets:"Contamination"
Registros recuperados: 125
Data/hora: 07/06/2024 05:37:09

Extracción de hidrocarburos y compuestos derivados del petróleo en suelos agrícolas de la  cuenca baja del río Tonalá.
Provedor de dados: 32
Autores: Pons Jiménez, Mirna.
El análisis de hidrocarburos en muestras de suelos, es una de las determinaciones más frecuentes en los estudios ambientales, de las zonas productoras de petróleo crudo. Una de las técnicas más utilizadas en el análisis de hidrocarburos de la fracción pesada del petróleo en suelos, es el método establecido en la Norma Oficial Mexicana NMX-AA-134-scfi-2006. Sin embargo, en el método se indica un mismo tiempo de extracción sin considerar las diferencias en las propiedades físicas y químicas del suelo. Por lo anterior, en este trabajo, se planteó optimizar el tiempo de extracción de compuestos derivados del petróleo mediante un sistema Soxhlet, en tres suelos con diferentes características físicas y químicas, empleando tres disolventes de polaridad diferente....
Palavras-chave: Análisis químico; Suelo; Contaminación; Petróleo crudo; Chemical analysis; Soil; Contamination; Crude oil; Maestría; Producción agroalimentaria en el trópico.
Ano: 2010
URL: http://hdl.handle.net/10521/78

Extracción de hidrocarburos y compuestos derivados del petróleo en suelos agrícolas de la  cuenca baja del río Tonalá.
Provedor de dados: 32
Autores: Pons Jiménez, Mirna.
El análisis de hidrocarburos en muestras de suelos, es una de las determinaciones más frecuentes en los estudios ambientales, de las zonas productoras de petróleo crudo. Una de las técnicas más utilizadas en el análisis de hidrocarburos de la fracción pesada del petróleo en suelos, es el método establecido en la Norma Oficial Mexicana NMX-AA-134-scfi-2006. Sin embargo, en el método se indica un mismo tiempo de extracción sin considerar las diferencias en las propiedades físicas y químicas del suelo. Por lo anterior, en este trabajo, se planteó optimizar el tiempo de extracción de compuestos derivados del petróleo mediante un sistema Soxhlet, en tres suelos con diferentes características físicas y químicas, empleando tres disolventes de polaridad diferente....
Palavras-chave: Análisis químico; Suelo; Contaminación; Petróleo crudo; Chemical analysis; Soil; Contamination; Crude oil; Maestría; Producción agroalimentaria en el trópico.
Ano: 2010
URL: http://hdl.handle.net/10521/78

Mecanismos de tolerancia del simbiosistema Azolla-Anabaena azollae ante arsénico y cobre.
Provedor de dados: 32
Autores: Sánchez Viveros, Gabriela.
Esta investigación evaluó algunos mecanismos de tolerancia del simbiosistema Azolla-Anabaena azollae ante agua contaminada con arsénico (As+5) y/o cobre (Cu2+). Para lo anterior, se plantearon seis fases experimentales: 1) identificar molecularmente a nivel de especie a diez colectas de Azolla, 2) evaluar la capacidad de acumulación de As+5 y los efectos tóxicos del metaloide en el simbiosistema Azolla-Anabaena azollae, 3) determinar la influencia del As+5 en la concentración de nueve elementos en las frondas de Azolla filiculoides, 4) evaluar el efecto del Cu2+ sobre la actividad fotosintética y permeabilidad de la membrana de Azolla filiculoides y Azolla caroliniana, 5) comparar la capacidad de acumulación de Cu2+ en dos especies de Azolla y, 6) conocer...
Palavras-chave: Contaminación; Fitorremediación; Helechos; Metales pesados; Metaloides; Contamination; Ferns; Heavy metals; Metalloids; Phytoremediation; Edafología; Doctorado.
Ano: 2012
URL: http://hdl.handle.net/10521/632

Caracterización de las condiciones para la micropropagación de Polianthes tuberosa L. a partir de cormo, hoja, flor y yema.
Provedor de dados: 32
Autores: Hernández Mendoza, Fanny.
Debido a las tecnologías con que se cuenta en la actualidad es relativamente fácil incrementar la biodiversidad y se considera que dos grupos de técnicas son indispensables para aumentar la variabilidad genética de los cultivos. Las técnicas empleadas para la inducción de mutaciones son las herramientas útiles para incrementar la variabilidad genética y las técnicas de cultivo in vitro permiten la multiplicación rápida de los fenotipos seleccionados. El nardo (Polianthes tuberosa L.) es una planta endémica de México, la importancia de este cultivo radica en que es utilizada como flor de corte así como en la industria farmacéutica y del perfume. Es peculiar que presenta poca variabilidad genética, porque es propagada vegetativamente. En este estudio se...
Palavras-chave: Propagación; Regeneración de plantas; Medio de cultivo; Hormonas; Eficiencia de la regeneración; Contaminación; Regeneration of plantlets; Culture media; Hormones; Contamination; Genética; Maestría; Regeneration efficiency.
Ano: 2013
URL: http://hdl.handle.net/10521/2108

Antimicrobiales para el control de hongos en una dieta artificial y su impacto en la supervivencia y reproducción de Spodoptera frugiperda (J. E. Smith).
Provedor de dados: 32
Autores: Zambrano Gutiérrez, Jorge.
Las dietas artificiales son importantes para establecer crías de insectos bajo condiciones controladas de laboratorio. Sin embargo, en estas condiciones también pueden la contaminación de las dietas con hongos. Para evitar la contaminación de las dietas de insectos se utilizan antimicrobiales que en algunas ocasiones ya están presentes en la dieta o bien se deben agregar a ésta. En el laboratorio de Toxicología de Insecticidas la dieta artificial BioServ Inc., Frenchtown, NJ. se contaminaba con hongos. Así mismo se observó que al controlar la contaminación, ésta se podría utilizar en la cría masiva de Spodoptera frugiperda. El objetivo general del presente trabajo fue estimar la supervivencia, reproducción, duración del ciclo de vida, peso de larvas de...
Palavras-chave: Contaminación; Dietas artificiales; Hongos; Cría masiva; Control; Antimicrobiales; Sobrevivencia; Reproducción; Contamination; Artificials diets; Fungi; Mass rearing; Control; Antimicrobials; Survival; Reproduction; Entomología y Acarología; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2034

Manejo y uso de biosólidos en suelos agrícolas
Provedor de dados: 32
Autores: Robledo Santoyo, Edmundo.
Como subproducto del tratamiento de las aguas residuales de la ciudad de Aguascalientes, Ags., en la Planta de Tratamiento “El Niágara”, se generan diariamente de 150 a 170 m3 de biosólidos. Estos materiales son aplicados a suelos agrícolas de áreas cercanas a la planta, sin regulación alguna, por lo que se han obtenido buenos resultados o causado quemaduras en plántulas o endurecimiento de suelos. El objetivo de este proyecto fue generar estrategias para la disposición y aprovechamiento de los biosólidos para mejorar suelos agrícolas y la calidad y rendimiento de los cultivos, sin perjuicio para el ambiente. Para determinar el efecto de los biosólidos sobre suelos y plantas, se colectaron muestras de los biosólidos y se tomaron muestras de tres tipos de...
Palavras-chave: Aguas residuales; Metales pesados; Contaminación; Mejoradores del suelo; Wastewater; Heavy metals; Contamination; Soil amendments; Edafología; Doctorado.
Ano: 2012
URL: http://hdl.handle.net/10521/1733

Tolerancia y biodegradación de plaguicidas con hongos filamentosos.
Provedor de dados: 32
Autores: Stamatiu Sánchez, Katina.
El uso indiscriminado y las malas prácticas de manejo de plaguicidas en la producción agrícola, han llevado a la contaminación de todos los ambientes debido a su fácil dispersión y representan un riesgo para la salud humana y fauna silvestre. Plaguicidas como el endosulfán (EN), clorpirifós (CRP) y clorotalonil (CTL) son de amplio uso en diferentes cultivos, están catalogados como carcinogénicos y disruptores endócrinos. El uso de microorganismos para degradar plaguicidas ha permitido implementar tecnologías de biorremediación conocidos como “biobeds”, en las que se busca acelerar la biodegradación con biomezclas de suelo, paja de trigo y composta. En esta investigación se evaluó la tolerancia y capacidad de degradación de hongos filamentosos provenientes...
Palavras-chave: Endosulfán; Clorpirifós; Contaminación; Hongos filamentosos; Tolerancia; Biodegradación; Chlorpyrifos; Contamination; Filamentous fungi; Tolerance; Biodegradation; Entomología y Acarología; Doctorado.
Ano: 2013
URL: http://hdl.handle.net/10521/2175

Caracterización de las condiciones para la micropropagación de Polianthes tuberosa L. a partir de cormo, hoja, flor y yema.
Provedor de dados: 32
Autores: Hernández Mendoza, Fanny.
Debido a las tecnologías con que se cuenta en la actualidad es relativamente fácil incrementar la biodiversidad y se considera que dos grupos de técnicas son indispensables para aumentar la variabilidad genética de los cultivos. Las técnicas empleadas para la inducción de mutaciones son las herramientas útiles para incrementar la variabilidad genética y las técnicas de cultivo in vitro permiten la multiplicación rápida de los fenotipos seleccionados. El nardo (Polianthes tuberosa L.) es una planta endémica de México, la importancia de este cultivo radica en que es utilizada como flor de corte así como en la industria farmacéutica y del perfume. Es peculiar que presenta poca variabilidad genética, porque es propagada vegetativamente. En este estudio se...
Palavras-chave: Propagación; Regeneración de plantas; Medio de cultivo; Hormonas; Eficiencia de la regeneración; Contaminación; Regeneration of plantlets; Culture media; Hormones; Regeneration efficiency; Contamination; Genética; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2331

Interacción simbiótica Rhizobium-leguminosas arbóreas en sistemas contaminados con hidrocarburos policíclicos aromáticos.
Provedor de dados: 32
Autores: López Ortiz, Carlos.
En este estudio se evaluó el establecimiento de la simbiosis entre Rhizobium tropici CIAT899 y las leguminosas arbóreas Leucaena leucocephala (Lam.) y Acaciella angustissima (Mill.) en sistemas contaminados con naftaleno (NAF) y fenantreno (FEN), y contempló dos fases experimentales. En la primera fase se evaluó el efecto de NAF y FEN en la dinámica de formación de nódulos, así como la respuesta de la planta en el contenido de compuestos fenólicos totales, actividad antioxidante total y contenido total de clorofilas y carotenos. En la segunda fase se evaluó la degradación de 60 mg FEN kg-1 de arena, así como la actividad de la enzima nitrogenasa en las rizosfera de las plantas. La contaminación con NAF y/o FEN tuvo efectos tóxicos para la formación de...
Palavras-chave: Nódulo; HPA's; Compuestos fenólicos; Contaminación; Nodule; Phenolic compounds; Contamination; Maestría; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/379

Lixiviación de atrazina en un vertisol del Bajío de Guanajuato, México
Provedor de dados: 32
Autores: Hernández Vargas, Juan.
La aplicación de plaguicidas en las áreas agrícolas puede causar contaminación ambiental. Por lo general los estudios sobre migración de plaguicidas en los terrenos agrícolas se realizan a través del muestreo periódico del suelo, agua y plantas. Tal enfoque es caro (150.00 USD solamente por análisis de un grupo químico de plaguicidas) y frecuentemente no permite pronosticar el nivel de contaminación potencial a futuro. Existen métodos para minimizar el costo de las investigaciones en campo a través de simulación matemática de los procesos de migración de plaguicidas ante todo en el suelo. Para aplicar estos métodos es necesario conocer algunos parámetros de transporte de plaguicidas en perfil del suelo. En el presente trabajo se realizaron experimentos...
Tipo: Tesis
Palavras-chave: Herbicida; Dispersividad; Velocidad; Degradación; Contaminación; Maestría; Hidrociencias; Herbicide; Dispersivity; Velocity; Degradation; Contamination.
Ano: 2008
URL: http://hdl.handle.net/10521/1633

Natural carriers in bioremediation: A review
Provedor de dados: 69
Autores: Dzionek,Anna; Wojcieszy&amp;#324;ska,Danuta; Guzik,Urszula.
Bioremediation of contaminated groundwater or soil is currently the cheapest and the least harmful method of removing xenobiotics from the environment. Immobilization of microorganisms capable of degrading specific contaminants significantly promotes bioremediation processes, reduces their costs, and also allows for the multiple use of biocatalysts. Among the developed methods of immobilization, adsorption on the surface is the most common method in bioremediation, due to the simplicity of the procedure and its non-toxicity. The choice of carrier is an essential element for successful bioremediation. It is also important to consider the type of process ( n s tu or ex s tu), type of pollution, and properties of immobilized microorganisms. For these reasons,...
Tipo: Journal article
Palavras-chave: Adsorption; Bioethanol production; Contamination; Heavy metals; Immobilization; Immobilized microorganisms; Natural carriers; Wine alterations; Wood barrels; Xenobiotics.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000500008

Removal of heavy metals by exopolymeric substances produced by resistant purple nonsulfur bacteria isolated from contaminated shrimp ponds
Provedor de dados: 69
Autores: Panwichian,Saijai; Kantachote,Duangporn; Wittayaweerasak,Banjong; Mallavarapu,Megharaj.
Two purple nonsulfur bacteria (PNSB) strains, Rhodobium marinum NW16 and Rhodobacter sphaeroides KMS24 were investigated for their potential to remove heavy metals (HMs) from contaminated shrimp pond water. Tolerance of both PNSB strains growing with both microaerobic-light and aerobic-dark conditions, based on their minimum inhibitory concentrations, was in the order of Cu2+ &gt; Zn2+ &gt; Cd2+ (Pb precipitation occurred at 0.34 mM). Results from a scanning electron microscope equipped with an energy dispersive X-ray spectrometer (SEM-EDX) indicated that Cu2+ and Zn2+ altered the cellular morphology of both strains and accumulated HMs were found in their cells. The highest amounts of both cations were found in their cell walls followed by the cytoplasm...
Tipo: Journal article
Palavras-chave: Contamination; Exopolymeric substances; Heavy metals; Photosynthetic bacteria; Shrimp farming.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000400002

Contamination of water by pesticides: a case study of the potatoes processing
Provedor de dados: 194
Autores: Forgiarini, Francisco Rossarolla; Baggiotto, Carine; Santana, Natielo Almeida.
Contamination of water by pesticides is one of the main environmental problems. Among the agricultural crops, potatoes stand out, as they employ a large quantity of pesticides throughout their production. This article aims to present a case study on the potato processing activity, discussing the environmental licensing process of the activity and the analysis of the impacts caused by the release of effluents into the environment. The effluent was collected in a sedimentation tank of an English-type potato processing industry, sent to the Pesticide Residue Analysis Laboratory for the detection of the possible pesticides present, being analyzed by High Performance Liquid Chromatography (HPLC) and characterized physicochemically through temperature,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contaminação; Agrotóxico; Legislação ambiental; Contamination; Agrochemicals; Environmental legislation.
Ano: 2023
URL: http://periodicos.ufsm.br/extensaorural/article/view/72051

Agricultura e qualidade da agua: contaminacao da agua por nitrato.
Provedor de dados: 14
Autores: RESENDE, A. V. de.
bitstream/CPAC-2009/24718/1/doc_57.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Contamination; Health.; Contaminação; Fósforo; Impacto Ambiental; Nitrogênio; Poluição da Água; Saúde.; Recurso Hídrico; Qualidade da Água; Environmental impact; Eutrophication; Nitrates; Nitrogen; Phosphorus; Water resources.; Water quality; Water pollution.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546464

Contaminação, conservação e alteração da carne.
Provedor de dados: 14
Autores: FEITOSA, T.
Transformacao do musculo em carne; contaminacao; fatores que influenciam a multiplicacao da flora inicial; atividade da agua; pH; potencial redox; temperatura; alteracao; alteracoes em temperaturas elevadas; aleracoes em temperaturas intermediarias; alteracoes em temperaturas baixas; conservacao; assepsia; emprego de temperaturas baixas; refrigeracao; congelamento; emprego do calor; radiacao; desidratacao; emprego deconservantes; cura; defumacao; condimentos; antibioticos...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Contamination; Conservation; Quality.; Carne; Conservação; Contaminação; Microbiologia; Qualidade.; Meat; Microbiology.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/421977

Potencial de impacto da agricultura sobre os recursos hídricos na região do cerrado.
Provedor de dados: 14
Autores: OLIVEIRA-FILHO, E. C. de; LIMA, J. E. F. W.
bitstream/CPAC-2009/24492/1/doc_56.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Contamination; Chemicals; Agricultural chemicals.; Agrotóxico; Cerrado; Contaminação; Fertilizante; Impacto Ambiental; Produto Químico; Poluição da Água; Recurso Hídrico; Qualidade da Água; Toxicologia.; Fertilizers; Environmental impact; Toxicology; Water resources.; Water quality; Water pollution.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567742

Potencial de contaminacao do Pantanal por pesticidas utilizados na Bacia do Alto Taquari, MS.
Provedor de dados: 14
Autores: VIEIRA, L. M.; GALDINO, S.; PADOVANI, C. R.
Os pesticidas compreendem um largo espectro de produtos quimicos usados na agropecuaria para controlar pragas, doencas de plantas e animais e combater ervas invasoras de culturas e pastagens. A eficacia comprovada desses produtos, aliada a crescente demanda setorial, viabilizou rapidamente a producao industrial, com o objetivo de incrementar a produtividade dos sistemas agropecuarios direcionados para a producao de alimentos. Os efeitos imediatos de toxicidade humana e ambiental foram durante muitos anos negligenciados ou considerados de menor relevancia. A expansao da agropecuaria na Bacia do Alto Paraguai (BAT), cuja superficie e de aproximadamente 29 mil km2, intensificada a partir da decada de 1970, passou a constituir uma serie ameaca para os...
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Rio Taquari; Pesticide; Contamination; Taquari river.; Contaminação; Impacto Ambiental; Meio Ambiente; Pesticida.; Pantanal; Environment; Environmental impact.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/793002

High performance liquid chromatographic screening and gas chromatography-nass spectrometry confirmation of tebuthiuron residues in drinking water.
Provedor de dados: 14
Autores: BONATO, P. S.; LANCHOTE, V. L.; DREOSSI, A. de C.
Tebuthiuron (N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N-dimethylurea) is a phenylurea herbicide used in sugar cane culture for the pre- and post-emergence control of weeds [1,2]. Analysis of tebuthiuron (Figure 1) and of other phenylurea herbicides in environmental samples can be performed by HPLC [3-10], or by gas chromatography using selective detectors such as nitrogen-prosphorus detector (NPD), eletron-capture detector (ECD), or a mass spectrometer (MS) [11-16]. Although Loh et al [17] reported that the use of temperatures above 280oC permits quantitative tebuthiuron breakdown, thus permitting the analysis of the products of decomposition formed, methods based on gas chromatography usually involve a derivatization step to permit analysis of...
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Analysis; Contamination; Residues; Calibration; Environmental impact; Groundwater; Herbicides; Quality control.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/13136

Alteração e conservação do leite.
Provedor de dados: 14
Autores: MACHADO, T. F.
Propriedades importantes; contaminacao; alteracao; conservacao; conclusao e recomendacao.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Conservation; Contamination; Quality.; Conservação; Contaminação; Leite; Microbiologia; Qualidade.; Milk.; Microbiology.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/421826

Dépistage des sources de pollutions microbiologiques en Seudre amont et dans le bassin de Marennes Oléron
Provedor de dados: 5
Autores: Auger, Christian; Courtois, Olivier; Kantin, Roger; Masson, Daniel; Piquet, Jean-come; Roesberg, Didier.
The oyster culture basin of Marennes - Oléron is characterized by the tastiness of its oysters and the good quality of its waters, and thus of its shellfish. On that account, the quasi-totality of the production areas are ranked A for non-burrowing shellfishes, thus confirming the privileged character of the basin. This microbiological and chemical quality contributing to the reputation of the basin's shellfish farms needs to be preserved. In this purpose, the Regional Shellfish Culture Section of Marennes - Oléron (SRC) approached the Ifremer in order to continue the monitoring of the microbiological quality carried out on different production areas susceptible to be affected by some bacteriological contaminations leading to a deterioration of the...
Tipo: Text
Palavras-chave: Contrôle; Contamination; Seudre; Bassin de Marennes Oléron; Surveillance; Pollution microbiologique.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-6304.PDF

Use of rotavirus virus-like particles as surrogates to evaluate virus persistence in shellfish
Provedor de dados: 5
Autores: Loisy, Fabienne; Atmar, R; Le Saux, Jean-claude; Cohen, J; Caprais, Marie-paule; Pommepuy, Monique; Le Guyader, Soizick.
Rotavirus virus-like particles (VLPs) and MS2 bacteriophages were bioaccumulated in bivalve mollusks to evaluate viral persistence in shellfish during depuration and relaying under natural conditions. Using this nonpathogenic surrogate virus, we were able to demonstrate that about 1 log(10) of VLPs was depurated after 1 week in warm seawater (22 degrees C). Phage MS2 was depurated more rapidly (about 2 log(10) in 1 week) than were VLPs, as determined using a single-compartment model and linear regression analysis. After being relayed in the estuary under the influence of the tides, VLPs were detected in oysters for up to 82 days following seeding with high levels of VLPs (concentration range between 10(10) and 10(9) particles per g of pancreatic tissue)...
Tipo: Text
Palavras-chave: Seawater; Viral diseases; Bioaccumulation; Depuration; Contamination; Model; Pancreas; Regression analysis; Shellfish; Phages; Virus.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-1233.pdf

Detection of multiple noroviruses associated with an international gastroenteritis outbreak linked to oyster consumption
Provedor de dados: 5
Autores: Le Guyader, Soizick; Bon, Fabienne; Demedici, Dario; Parnaudeau, Sylvain; Bertone, Alessandra; Crudeli, Silvia; Doyle, Aoife; Zidane, Mohamed; Suffredini, Elisabetta; Kohli E, Evelyne; Maddalo, Francesco; Monini, Marina; Gallay, Anne; Pommepuy, Monique; Pothier, Pierre; Ruggeri, Franco M.
An international outbreak linked to oyster consumption involving a group of over 200 people in Italy and 127 total subjects in 13 smaller clusters in France was analyzed using epidemiological and clinical data and shellfish samples. Environmental information from the oyster-producing area, located in a lagoon in southern France, was collected to investigate the possible events leading to the contamination. Virologic analyses were conducted by reverse transcription-PCR (RT-PCR) using the same primer sets for both clinical and environmental samples. After sequencing, the data were analyzed through the database operated by the scientific network FoodBorne Viruses in Europe. The existence of an international collaboration between laboratories was critical to...
Tipo: Text
Palavras-chave: Seafood; Contamination; Norovirus; Epidemiology; Virology; Oyster.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2096.pdf

Suivi bactériologique des gisements naturels de coquillages des Côtes d'Armor fréquentés en pêche à pied - Année 2005
Provedor de dados: 5
Autores: Rougerie, Michel; Prigent, Jean-luc.
Tipo: Text
Palavras-chave: France; Bay of Saint Brieuc; Bacteriology; Contamination; Coastal zone; Recreational fishing; Shellfish  beds.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/2006/rapport-2103.pdf

La qualité marchande des moules. Méthodologie pour la maîtrise du risque sanitaire
Provedor de dados: 5
Autores: Fradet, Alain.
L'augmentation récente de la production mytilicole nationale et l'application de la directive 91/492 CEE relative aux conditions sanitaires de la production et de la mise sur le marché des mollusques bivalves vivants sont venues perturber les habitudes de mise sur le marché des moules en France. La concurrence entre bassins mytilicoles et dans une moindre mesure avec les produits d'importation conduit les professionnels à vouloir différencier la qualité de leurs produits pour éviter la baisse généralisée des cours observée depuis la fin des années 1980. Par ailleurs, la nouvelle réglementation en place impose aux mytiliculteurs de s'assurer de la qualité sanitaire des moules qu'ils mettent sur le marché par des autocontrôles obligatoires. Les difficultés...
Tipo: Text
Palavras-chave: Bivalves; Mytiliculture; Production; Contamination; Normes; Qualité; Établissements mytilicoles; Autocontrôles; HACCP.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00103/21441/19022.pdf

Impacts des substances chimiques sur l’écosystème. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Knoery, Joel.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Substances chimiques; Impacts; Contamination; Bioindication; Imposex; Hot spots.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44053/43624.pdf

Apports nutritifs et bactériens en estuaire de Penzé. Année 2000
Provedor de dados: 5
Autores: Piriou, Jean-yves; Droit, Julie.
L'estuaire de la Penzé (nord-Finistère, France) est le siège de plusieurs dysfonctionnements de type biologique (eutrophisation et contaminations bactériennes) qui nécessitent une bonne connaissance et un suivi des apports d'origine terrigène susceptibles d'influencer ou de provoquer ces phénomènes. Une étude sur ce secteur test a permis la mise au point d'une méthodologie de suivi des apports à l'estuaire. Celle-ci se fait en quatre étapes: 1. Inventaire des paramètres de suivi des apports. • Dans le cas de la prolifération des macroalgues du genre ulva et des microalgues toxiques Alexandrium minutum, les différents apports nutritifs azotés, phosphorés et siliceux ont été mesurés. • Dans le cas de la contamination des mollusques bivalves d'ostréiculture...
Tipo: Text
Palavras-chave: Apports; Bactéries; Bassins versants; Contamination; Eutrophisation marine; Rejets; Sels nutritifs.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00105/21660/19241.pdf

Environment and immunomodulation : effects of the soluble fraction of Norwegian heavy fuel on the immune system of Pacifc oyster, Crassostrea gigas
Provedor de dados: 5
Autores: Bado-nilles, Anne; Auffret, Michel; Quentel, Claire; Le Floch, Stéphane; Arzel, Jacqueline; Gagnaire, Beatrice; Renault, Tristan; Thomas-guyon, Hélène.
Estuaries and coastal areas are often subjected to much pollution, including pesticides and polycyclic aromatic hydrocarbons (PAHs) produced by anthropic activities. Bay of Marennes-Oléron is an estuarine coastal zone in which there is a high level of aquacultural production and this has adverse effects in aquatic organisms. In fact, PAHs, which are widely spread throughout aquatic ecosystems, have a low polarity and so there is a clear tendency to bioaccumulate in marine organisms (1). The harmful effects of such contaminants on the organism's immune system, leading to a decreased resistance to pathogens, is a relatively new area of research and it still poorly understood. The aim of the present work was to detect the impact in vivo of PAHs on the immune...
Tipo: Text
Palavras-chave: PaHs; Contamination; Crassostrea gigas; Oyster.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3428.pdf

Trace metal concentrations in the muscle of seven marine species: Comparison between the Gulf of Lions (North-West Mediterranean Sea) and the Bay of Biscay (North-East Atlantic Ocean)
Provedor de dados: 5
Autores: Mille, Tiphaine; Cresson, Pierre; Chouvelon, Tiphaine; Bustamante, Paco; Brach-papa, Christophe; Bruzac, Sandrine; Rozuel, Emmanuelle; Bouchoucha, Marc.
Concentrations of 6 trace metals (Ag, Cd, Cu, Ni, Pb, Zn) in the muscle of 2 sharks (Galeus melastomus and Scyliorhinus canicula), 4 teleosts (Helicolenus dactylopterus, Lepidorhombus boscii, Micromesistius poutassou and Phycis blennoides) and 1 crustacean (Nephrops norvegicus) were compared between the Bay of Biscay (Atlantic Ocean) and the Gulf of Lions (Mediterranean Sea). Although average concentrations and the trace element pollution index were generally higher in the Gulf of Lions, significant differences between the two ecosystems were only found for Zn for Helicolenus dactylopterus, and for Ag and Cu for the crustacean N. norvegicus. Moreover, some relationships between trophic level or size and metal concentrations were found for these two...
Tipo: Text
Palavras-chave: Inorganic elements; Contamination; Bioaccumulation; Fish; Shark; Norway lobster.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00448/55958/57497.pdf

Qualité microbiologique des coquillages destinés à la consommation humaine : contamination des coquillages par Escherichia coli. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Amouroux, Isabelle.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Coquillages; Escherichia coli; Contamination; Réglementation; Qualité microbiologique; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44060/43631.pdf

Impacts microbiologiques comparés des fleuves côtiers dans le Pertuis Breton 2002-2004. Rapport final
Provedor de dados: 5
Autores: Ryckaert, Mireille; Thomas, Gerard; Derrien, Annick.
Les résultats du réseau REMI et de l’étude de salubrité 1998-2000 contractualisée entre la SRC Ré-Centre-Ouest et l’IFREMER, ont établi la responsabilité de la Sèvre, du Lay et du Curé dans les épisodes de contaminations microbiologiques du pertuis Breton. Toutefois, ces résultats ne permettent pas de préciser le rôle respectif de chaque cours d’eau. Des investigations complémentaires s’avèrent nécessaires pour répondre à cette question.  Le présent rapport synthétise l’ensemble résultat acquis au cours de cette étude.
Tipo: Text
Palavras-chave: Microbiologie; Surveillance; Réseau REMI; Contamination; Pertuis Charentais; Charente-Maritime.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00140/25081/23189.pdf

Diagnostic des contaminations microbiologiques des chenaux de Payré
Provedor de dados: 5
Autores: Thomas, Gerard; Stanisiere, Jean-yves; Fillon, Alain; Paticat, Francois; Chabirand, Jean-michel; Derrien, Annick; Grizon, James.
De 2007 à 2010, deux études ont été menées sur le Havre du Payré pour recueillir des éléments permettant de mieux appréhender les épisodes de pollution microbiologique menaçant la zone ostréicole. L’objectif est de fournir aux collectivités des informations en vue d’appuyer la politique de reconquête de la qualité du milieu et d’aider la profession à optimiser la gestion de sa production. Ces études ont montré le caractère particulier de l’hydraulique de ce site avec une forte réactivité vis à vis des apports du bassin versant et un fonctionnement estuarien favorisant la rétention de l’eau selon certaines conditions de marée et lors de circonstances météorologiques particulières. Elles ont également permis de hiérarchiser les flux bactériens provenant des...
Tipo: Text
Palavras-chave: Chenaux du Payré; Vendée; Bassins versants; Hydraulique; Microbiologie; Contamination; Huîtres.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00123/23421/21248.pdf

Contamination of some aquatic species with the organochlorine pesticide chlordecone in Martinique
Provedor de dados: 5
Autores: Coat, Sophie; Bocquene, Gilles; Godard, Eric.
Martinique is a French overseas department whose economy relies heavily on agriculture. Organochlorine pesticides, mainly chlordecone, were used for banana cultivation to eradicate banana weevil over a period of 40 years. Chlordecone is chemically stable,and has a strong affinity for fatty tissues. It is therefore able to bioaccumulate in animals and thereby represent a threat to ecosystems and man. Soils from banana plantations in Martinique are heavily contaminated with chlordecone. Possible transfer of these molecules from agricultural watersheds to the aquatic environment and the organisms that live in it is feared. The hypothesis that ecosystems of Martinique might be highly contaminated with this organochlorine pesticide was investigated. Chlordecone...
Tipo: Text
Palavras-chave: W Atlantic; Caribbean Islands; Food web; Aquatic organisms; Chlordecone; Contamination; Pesticides.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1662.pdf

Le mercure en milieu marin. Biogéochimie et écotoxicologie
Provedor de dados: 5
Autores: Cossa, Daniel; Thibaud, Yves; Roméo, Michèle; Gnassia-barelli, Mauricette.
This report synthesizes the knowledge on the biogeochemical cycle, bioconcentration processes and ecotoxicity of mercury in the marine environment. Man induced changes on the mercury cycle, especially along the French coasts are reviewed. Concentration levels, mechanisms and fluxes between geochemical reservoirs are assessed. Emphasis is given on sublethal effects and toxicity mechanisms. Quality standards used in European Community countries are listed. Conclusions and recommendations for environmental management and research are given.
Tipo: Text
Palavras-chave: Mercure; Biogéochimie; Contamination; Écotoxicologie; Mercury; Biogeochemistry; Contamination; Ecotoxicology.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00332/44319/43890.pdf

Transport et mélange d'un rejet urbain dans le milieu marin - Mer Méditerranée
Provedor de dados: 5
Autores: Thouvenin, Benedicte.
Dans le cadre du programme national "REJETS URBAINS EN MER", développé par l'IFREMER, en collaboration avec l'Agence de Bassin Rhône Méditerranée Corse, des études sur le comportement d'un effluent émis par un émissaire en profondeur ont été réalisées. Complétant des mesures courantométriques et hydrologiques de longue durée, en un point à la sortie de l'émissaire de TOULON EST, deux modèles mathématiques ont été appliqués pour reproduire et étudier le rejet pendant les deux étapes de dilution. · Le modèle JET, développé par la SOGREAH, a été testé et comparé avec des mesures in situ. Les variations des résultats en fonction des conditions du milieu rencontrées pendant un cycle annuel ont été étudiées. Un modèle de transport et mélange multicouches a été...
Tipo: Text
Palavras-chave: Rejet urbain; Modèle mathématique; Rade de Toulon; Dispersion; Contamination.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00132/24287/22285.pdf

Assessment of the contamination of marine fauna by chlordecone in Guadeloupe and Martinique (Lesser Antilles)
Provedor de dados: 5
Autores: Dromard, Charlotte; Bodiguel, Xavier; Lemoine, Soazig; Bouchon-navaro, Yolande; Reynal, Lionel; Thouard, Emmanuel; Bouchon, Claude.
Chlordecone is an organochlorine pesticide, used in the Lesser Antilles from 1972 to 1993 to fight against a banana weevil. That molecule is very persistent in the natural environment and ends up in the sea with runoff waters. From 2003 to 2013, seven campaigns of samplings have been conducted to evaluate the level of contamination of fish, crustaceans, and mollusks. The present study is the first assessment and the first comparison of the concentrations of chlordecone between marine areas, taxonomic groups, and ecological factors like trophic groups or preferential habitat of fish species. The four most contaminated marine areas are located downstream the contaminated rivers and banana plantations. Crustaceans seemed to be more sensitive to the...
Tipo: Text
Palavras-chave: Chlordecone; Organochlorine pollution; Marine fauna; Contamination; Guadeloupe; Martinique.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00309/41989/41379.pdf

Evaluation of the impacts of land-based contaminants on the benthic faunas of Jakarta Bay, Indonesia
Provedor de dados: 5
Autores: Rees, Jg; Setiapermana, D; Sharp, Va; Weeks, Jm; Williams, Tm.
To evaluate the impact of land-based contaminants on benthic faunas, as part of the Land-Ocean Contamination Study (LOCS), a study transect was established in Jakarta Bay, Indonesia during the 1996 southeasterly monsoon. The transect extended 72 km between the city's main port, Tanjung Priok, and the Pilau Seribu Island chain in the Java Sea. The dissolved concentrations of Pb, Cu, Zn, Cr and Ni in seawater, in suspended particulate matter (SPM) and surficial sea bed sediments were measured along the transect at nine sites. In addition, metal concentrations were measured in tissues of the corals Goniopora lobata and Lobophyllia hemprichii at five sites, and of the green mussel, Perna viridis at six sites. An assessment of the impact of contaminants on the...
Tipo: Text
Palavras-chave: Djakarta; Contamination; Biomarqueur; Communauté corallienne; Jakarta; Contamination; Biomarker; Coral-community.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43588/44028.pdf

Mercury in seabird feathers: Insight on dietary habits and evidence for exposure levels in the western Indian Ocean
Provedor de dados: 5
Autores: Kojadinovic, Jessica; Bustamante, Paco; Churlaud, Carine; Cosson, Richard P.; Le Corre, Matthieu.
Breast feathers were used to estimate mercury levels in six marine birds nesting in the tropical western Indian Ocean, i.e. Sooty Tern (Sterna fuscata), Brown Noddy (Anous stolidus), Lesser Noddy (Anous tenuirostris), Audubon Shearwater (Puffinus lherminieri bailloni), Barau's Petrel (Pterodroma baraui) and the White-tailed Tropicbird (Phaethon lepturus). Juveniles consistently showed lower plumage mercury than adults. The lowest mean level was noted in juvenile Sooty Terns from the Glorioso Archipelago (0.05 mu g g(-1)). The highest levels were obtained for adult Barau's Petrels from Reunion Island (0.96 mu g g(-1)). An inter-site analysis of Sooty Tern showed higher mercury levels in birds nesting on Juan de Nova Island. Levels were low in comparison...
Tipo: Text
Palavras-chave: Tropical islands; Contamination; Bioaccumulation; Mercury; Trophic ecology; Marine birds.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3416.pdf

L'étain et les organoétains en milieu marin. Biogéochimie et écotoxicologie.
Provedor de dados: 5
Autores: Alzieu, Claude.
This report synthesizes the knowledge on the biogeochemical cycle, bioconcentration processes and ecotoxicity of tin and organotins in the marine environment. Concentrations levels, biomethylation mechanisms and exchanges between sediments and water are assessed. Emphasis is given on tributyltin sublethal effects, toxicity mechanisms and no effect levels for the most sensitive organisms. Regulations on the use of organotins as antifoulants in paints are examined. Conclusions and recommendations for environmental management and research are given.
Tipo: Text
Palavras-chave: Étain; Biogéochimie; Contamination; Écotoxicologie.; Tin; Biogeochemistry; Contamination; Ecotoxicology.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00332/44314/43883.pdf

Le plomb en milieu marin. Biogeochimie et ecotoxicologie
Provedor de dados: 5
Autores: Cossa, Daniel; Elbaz-poulichet, Françoise; Gnassia-barelli, Mauricette; Romeo, Michèle.
This report synthesises the knowledge on the biogeochemical cycle, bioconcentration processes and ecotoxicity of lead in the marine environment. Man induced changes on the lead cycle, especially along the French coasts are reviewed. Concentration levels, mechanisms and fluxes between geochemical reservoirs are assessed. Emphasis is given on sublethal effects and toxicity mechanisms. Quality standards used in European Community countries are listed. Conclusions and recommendations for environmental management and research are given.
Tipo: Text
Palavras-chave: Ecotoxicology; Contamination; Biogeochemistry; Lead; Ecotoxicologie; Contamination; Biogeochimie; Plomb.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/rapport-1449.pdf

Macroplastic and microplastic contamination assessment of a tropical river (Saigon River, Vietnam) transversed by a developing megacity
Provedor de dados: 5
Autores: Lahens, Lisa; Strady, Emilie; Kieu-le, Thuy-chung; Dris, Rachid; Boukerma, Kada; Rinnert, Emmanuel; Gasperi, Johnny; Tassin, Bruno.
Both macroplastic and microplastic contamination levels were assessed for the first time in a tropical river estuary system, i.e. the Saigon River, that traverses a developing South East Asian megacity, i.e. Ho Chi Minh City, Vietnam. The analysis of floating debris collected daily on the Nhieu Loc - Thi Nghe canal by the municipal waste management service shows that the plastic mass percentage represents 11-43%, and the land-based plastic debris entering the river was estimated from 0.96 to 19.91 g inhabitant-1 d-1, namely 350 to 7270 g inhabitant-1 yr-1. Microplastics were assessed in the Saigon River and in four urban canals by sampling bulk water for anthropogenic fiber analysis and 300 μm mesh size plankton net exposition for fragment analysis. Fibers...
Tipo: Text
Palavras-chave: Microplastic; Macroplastic; Urban river; Contamination; Anthropogenic fibers.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00427/53815/55460.pdf

Organic and inorganic human-induced contamination of Posidonia oceanica meadows
Provedor de dados: 5
Autores: Pergent, Gerard; Labbe, Celine; Lafabrie, Celine; Kantin, Roger; Pergent-martini, Christine.
In coastal environments, plants are used for phytoremediation of contamination. Organic and inorganic contaminants may be due to natural and/or anthropogenic sources. The aim of this study is to compare inorganic (trace metal) and organic (PAH) contamination in Posidonia oceanica and to analyse the relationship between these types of pollutants indeed very few studies have been interested in their correlations and common sources. P. oceanica leaves were collected in two sites exhibiting different levels of human-induced pressure. Higher values were recorded in the more polluted site (Toulon) for trace metals (Ag, Hg, Pb) as well as for PAHs (Medium Molecular Weight and High Molecular Weight) due to the presence of the city and/or harbour in proximity. For...
Tipo: Text
Palavras-chave: Trace metals; Polycyclic aromatic hydrocarbons; Contamination; Seagrass; Posidonia oceanica; Mediterranean.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00038/14913/15671.pdf

Pesticide contamination of the coastline of Martinique
Provedor de dados: 5
Autores: Bocquene, Gilles; Franco, Alain.
In January and February 2002, the presence of certain agricultural pesticides throughout the coastline of the Caribbean island of Martinique was investigated. The tropical climate of the French West Indies is suitable for banana production, which requires intensive use of pesticides. An inventory of all pesticides used on the island (compounds and tonnage) was compiled. Surveys and analyses revealed the presence of pesticides in the plumes of seven rivers. The organochlorine chlordecone and metabolites of aldicarb were detected at nearly all of the monitored sites, even though the use of chlordecone has been prohibited since 1993. Two triazines (ametryn and simazine) were also identified. The concentrations of carbamates and triazines detected in the water...
Tipo: Text
Palavras-chave: Aldicarb; Chlordecone; Triazines; Pesticides; Contamination; Martinique Island.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-879.pdf

Incidences de l'Amoco Cadiz sur les exploitations ostréicoles
Provedor de dados: 5
Autores: Grizel, Henri; Michel, Pierre; Abarnou, Alain; Guegan, B.
Oyster contamination present on Oyster-beds in Abers-Morlaix bay when stranding arrives, decontamination of this oysters in others clean rivers an clean oyster stocks in oyster-beds, submersible and insubmersible thanks in pollute rivers are described. Pratical implication of this result in given.
Tipo: Text
Palavras-chave: Amoco Cadiz; Croissance; Mortalités; Décontamination; Marée noire; Contamination; Pollution; Huîtres.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/acte-6247.PDF

Le cadmium en milieu marin. Biogéochimie et écotoxicologie.
Provedor de dados: 5
Autores: Cossa, Daniel; Lassus, Patrick.
This report synthesizes the knowledge on the biogeochemical cycle, bioconcentration processes and ecotoxicity of cadmium in the marine environment. Man induced changes on the cadmium cycle, especially along the French coasts are reviewed. Concentration levels, mechanisms and fluxes between geochemical reservoirs are assessed. Emphasis is given on sublethal effects and toxicity mechanisms. Quality standards used in European Community countries are listed. Conclusions and recommendations for environmental management and research are given.
Tipo: Text
Palavras-chave: Cadmium; Biogéochimie; Contamination; Écotoxicologie.; Cadmium; Biogeoclzemistry; Contamination; Ecotoxicology.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00332/44312/43866.pdf

Situation of wild beds of Crassostrea gigas regarding OsHV-1 µvar: spatiotemporal description of contamination in Pacific oyster wild beds in Marennes Oleron Bay
Provedor de dados: 5
Autores: Pepin, Jean-francois; Soletchnik, Patrick; Lupo, Coralie; Geairon, Philippe; Seugnet, Jean-luc; Robert, Stephane; Bernard, Ismal; Le Moine, Olivier.
This study focuses on the situation of wild oyster beds of Crassostrea gigas against OsHV-1 μvar and presents a spatio-temporal description of the OsHV-1 contamination in wild oyster beds in the bay of Marennes-Oléron from a range of sampling based on a hydrodynamic model and analyzes conducted in 2010. The objectives were to describe wild populations of pacific oysters in Marennes Oleron bay; to characterize these populations regarding OsHV-1 prevalence for spat and adults in connection with the isolation level from reared stocks and the sampling periods.
Tipo: Text
Palavras-chave: Virus; OsHV-1; Contamination; Oysters; Crassostrea gigas; Spatiotemporal description; Marennes Oleron Bay.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00105/21673/19251.pdf

Growth, condition and metal concentration in juveniles of two Diplodus species in ports
Provedor de dados: 5
Autores: Bouchoucha, Marc; Brach-papa, Christophe; Gonzalez, Jean-louis; Lenfant, P.; Darnaude, A. M.
High abundances of juvenile fish in certain ports suggest they might provide alternative nursery habitats for several species. To further investigate this possibility, post-settlement growth, metal uptake and body condition were estimated in 127 juveniles of two seabream species, collected in 2014–15, inside and outside the highly polluted ports of the Bay of Toulon. This showed that differences in local pollution levels (here in Hg, Cu, Pb and Zn) are not consistently mirrored within fish flesh. Muscle metal concentrations, below sanitary thresholds for both species, were higher in ports for Cu, Pb and V only. Otherwise, fish muscle composition principally differed by species or by year. Juvenile growth and condition were equivalent at all sites. Higher...
Tipo: Text
Palavras-chave: Coastal areas; Nursery habitats; Fish; Contamination; Otoliths.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00408/51932/52609.pdf

Influence of Crassostrea gigas (Thunberg) sexual maturation stage and ploidy on uptake of paralytic phycotoxins
Provedor de dados: 5
Autores: Gueguen, Marielle; Baron, Regis; Bardouil, Michele; Haberkorn, Hansy; Soudant, Philippe; Truquet, Philippe; Lassus, Patrick.
The purpose of this study was to assess paralytic phycotoxin uptake in diploid and triploid oysters at two stages of their sexual cycle corresponding to their status in early summer (June) and winter (November). Samples of diploid and triploid oysters were exposed to a toxic culture of Alexandrium minutum for 4 days in each season. No significant differences in filtration or clearance rates were observed during either November or June experiments. When diploid oysters were at resting stage (November), toxin uptake showed no significant difference between the ploidy classes. In contrast, when the diploid oysters were at the peak of their sexual maturation (June), the triploid oysters were seen to accumulate almost double the amount of paralytic toxins as...
Tipo: Text
Palavras-chave: Paralytic shellfish poisoning; Crassostrea gigas; Diploid; Triploid; Contamination.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00087/19796/17487.pdf

Contamination des coquillages par les norovirus en rivière d'Auray (Norocoqauray)
Provedor de dados: 5
Autores: Treguier, Cathy; Schaeffer, Julien; Le Saux, Jean-claude; Cochennec-laureau, Nathalie; Le Guyader, Soizick.
Les norovirus (NoV) sont responsables des épidémies hivernales de gastroentérites aiguës dans la population. Ils sont excrétés dans les fèces humains, puis se retrouvent, après épuration insuffisante, dans le milieu marin naturel où ils peuvent contaminer des coquillages, qui à leur tour risquent de déclencher des gastroentérites chez les consommateurs. Cette étude vise à améliorer les connaissances sur la contamination des coquillages en élevage en rivière d’Auray par les NoV, en lien avec les bactéries témoins de contamination fécale Escherichia coli (E. coli). L’objectif est de suivre les flux de NoV et d’E. coli apportés par différents rejets (dont une station d’épuration) impactant la zone conchylicole et leur influence sur la qualité des coquillages...
Tipo: Text
Palavras-chave: Norovirus; Coquillages; Contamination; Station d’épuration; Flux; Rivière d’Auray; Escherichia coli.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00267/37778/35829.pdf

Evaluation de la qualité des zones de production conchylicole : Département : Gironde - Edition 2006
Provedor de dados: 5
Autores: Cantin, Christian; Neaud-masson, Nadine; Mayeur, Didier.
After a reminder of the objectives, operation and method of interpreting the results of the REMI microbiological monitoring network, this report establishes a national assessment and describes the annual programme of the Gironde region. It presents all of the results obtained, in particular the assessment of the quality of listed shellfish production areas and the evolution of their quality.
Tipo: Text
Palavras-chave: Escherichia coli; Contamination; Microbiology; Environment quality; Shellfish culture; Département de la Gironde; Classement sanitaire des zones de production; Contamination bactériologique des coquillages; Escherichia coli; REMI.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2102.pdf

Contamination des coquillages par des bactéries pathogènes pour l’homme. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Hervio-heath, Dominique; Gourmelon, Michele; Catherine, Martial.
Tipo: Text
Palavras-chave: Méditerranée; Coquillages; Contamination; Suivi; Bactéries pathogènes.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44244/43813.pdf

Les polychlorobiphényles (PCB) en milieu marin : biogéochimie et écotoxicologie
Provedor de dados: 5
Autores: Marchand, Michel; Abarnou, Alain; Marcaillou-le Baut, Claire.
This report synthesizes the knowledge on the behaviour, bioconcentration processes and ecotoxicity ofPCB in the marine environment. Contamination levels of the French coasts are examined. Concentration levels, mechanisms andfluxes between geochemicai reservoirs are assessed. Emphasis is given on subiethai effects and toxicity mechanisms. Quality standards used in European Community countries are listed. Conclusions and recommendations for environmentai management and research are given.
Tipo: Text
Palavras-chave: PCB; Biogéochimie; Contamination; Écotoxicologie; PCBs; Biogeochemistry; Contamination; Ecotoxicology.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00148/25954/24045.pdf

Synthèse des journées microbiologie sanitaire 2013
Provedor de dados: 5
Autores: Garry, Pascal.
Les journées de microbiologie sanitaire sont organisées chaque année par le Laboratoire Santé, Environnement et Microbiologie (LSEM). Ces journées permettent de réaliser un bilan des activités liées aux missions de Laboratoire National de Référence Microbiologie des coquillages ainsi que de la surveillance (REMI). Les derniers résultats de la recherche menée au LSEM ou dans les Laboratoires Environnement Ressource (LER) sont également présentés. En 2013, 102 personnes ont participé à ces journées. Y participaient, des représentants de l’administration centrale (DGAL et INVS), de l’administration locale (ARS, DDTM, DDPP, CIRE), des agences de l’eau, des professionnels (CRC) et des laboratoires agréés.
Tipo: Text
Palavras-chave: Microbiologie; Surveillance; Normes; Réglementation; Contamination; Coquillages.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00186/29691/28067.pdf

Environment and immunomodulation : effects of the soluble fraction of Norwegian heavy fuel on the immune system of Sea bass, Dicentrarchus labrax
Provedor de dados: 5
Autores: Bado-nilles, Anne; Quentin, Claire; Le Floch, Stéphane; Arzel, Jacqueline; Auffret, Michel; Gagnaire, Beatrice; Renault, Tristan; Thomas-guyon, Hélène.
Estuaries and coastal areas are often subjected to much pollution, including pesticides and polycyclic aromatic hydrocarbons (PAHs) produced by anthropic activities. Bay of Marennes-Oléron is an estuarine coastal zone in which there is a high level of aquacultural production and this has adverse effects in aquatic organisms. In fact, PAHs, which are widely spread throughout aquatic ecosystems, have a low polarity and so there is a clear tendency to bioaccumulate in marine organisms (1). The harmful effects of such contaminants on the organism's immune system, leading to a decreased resistance to pathogens, is a relatively new area of research and it still poorly understood.  The aim of the present work was to detect the impact in vivo of PAHs on the immune...
Tipo: Text
Palavras-chave: PaHs; Fish; Contamination; Dicentrarchus labrax.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3427.pdf

Contamination de l'environnement littoral par les rotavirus du groupe A. Détection par amplification enzymatique en chaîne et analyse du polymorphisme de restriction de séquences virales dans les eaux de surfaces et les coquillages
Provedor de dados: 5
Autores: Dubois, Eric.
Les rotavirus font partie des principaux virus entériques humains susceptibles d'être rencontrés dans l'environnement. Leur mise en évidence par culture cellulaire dans des prélèvements est longue et peu sensible, ce qui explique le manque de données sur la contamination du littoral. La RT-seminested PCR a été développée pour pallier ces inconvénients. Après une mise au point méthodologique cette technique a été utilisée lors d'études in vitro et in situ. Les études in vitro sur le devenir des rotavirus en eau de mer, suivi par RT-PCR quantitative et par multiplication en culture cellulaire, montrent que dans des conditions proches de celles du milieu naturel (eau de mer non stérile et à une température relativement basse), la détection d'ARN viral peut...
Tipo: Text
Palavras-chave: Rotavirus; Contamination; Coquillages; Eaux de stations d'épuration; Echantillons cliniques; RT-PCR; RFLP; Epidémiologie moléculaire.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00442/55376/56894.pdf

Qualité microbiologique des coquillages destinés à la consommation humaine : contamination des coquillages par Escherichia coli. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Amouroux, Isabelle.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Coquillages; Contamination; Escherichia coli; Réglementation; Qualité microbiologique; Evolution.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43873/43447.pdf

Trophic ecology influence on metal bioaccumulation in marine fish: Inference from stable isotope and fatty acid analyses
Provedor de dados: 5
Autores: Le Croizier, Gael; Schaal, Gauthier; Gallon, Regis; Fall, Massal; Le Grand, Fabienne; Munaron, Jean-marie; Rouget, Marie-laure; Machu, Eric; Le Loc'H, Francois; Lae, Raymond; De Morais, Luis Tito.
The link between trophic ecology and metal accumulation in marine fish species was investigated through a multi-tracers approach combining fatty acid (FA) and stable isotope (SI) analyses on fish from two contrasted sites on the coast of Senegal, one subjected to anthropogenic metal effluents and another one less impacted. The concentrations of thirteen trace metal elements (As, Cd, Co, Cr, Cu, Fe, Li, Mn, Ni, Pb, Sn, U, and Zn) were measured in fish liver. Individuals from each site were classified into three distinct groups according to their liver FA and muscle SI compositions. Trace element concentrations were tested between groups revealing that bioaccumulation of several metals was clearly dependent on the trophic guild of fish. Furthermore,...
Tipo: Text
Palavras-chave: Trace elements; Biochemical tracers; Diet; Contamination; Senegal; Tropical fish.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00348/45908/45707.pdf

Metal and metalloid bioaccumulation in the Pacific blue shrimp Litopenaeus stylirostris (Stimpson) from New Caledonia: Laboratory and field studies
Provedor de dados: 5
Autores: Metian, Marc; Hedouin, Laetitia; Eltayeb, Mohamed M.; Lacoue-labarthe, Thomas; Teyssie, Jean-louis; Mugnier, Chantal; Bustamante, Paco; Warnau, Michel.
The present work aimed at better understanding metal and metalloid bioaccumulation in the edible Pacific blue shrimp Litopenaeus stylirostris, using both laboratory and field approaches. In the laboratory, the bioaccumulation kinetics of Ag, Cd, Co, Cr, and Zn have been investigated in shrimp exposed via seawater and food, using the corresponding gamma-emitting radiotracers (Ag-110m, Cd-109, Co-57, Cr-51, and Zn-65) and highly sensitive nuclear detection techniques. Results showed that hepatopancreas and intestine concentrated the metals to the highest extent among the blue shrimp organs and tissues. Moulting was found to play a non negligible detoxification role for Co, Cr and, to a lesser extent, Zn. Metal retention by L stylirostris widely varied (from...
Tipo: Text
Palavras-chave: Crustacean; Metals; Biokinetics; Radiotracers; Moulting; Contamination.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00014/12528/9869.pdf

Otolith fingerprints as natural tags to identify juvenile fish life in ports
Provedor de dados: 5
Autores: Bouchoucha, Marc; Pecheyran, C.; Gonzalez, Jean-louis; Lenfant, P.; Darnaude, A. M.
The construction of ports has caused substantial habitat destruction in coastal areas previously used as nursery grounds by many fish species, with consequences to fish stocks. These artificial coastal areas might provide alternative nursery habitats for several species for juvenile fish abundances and growth in ports, although their contribution to adult stocks had never been estimated. The variability of otolith composition in the juveniles of two Diplodus species was investigated in three contrasting port areas and two adjacent coastal juvenile habitats of the Bay of Toulon (northwestern Mediterranean) in order to determine the possible use of otolith fingerprints as natural tags for the identification of juvenile fishes in ports. The global accuracy of...
Tipo: Text
Palavras-chave: Coastal areas; Nursery habitats; Fish; LA-ICPMS; Contamination.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00449/56051/57571.pdf

Etat de la contamination du Bassin d'Arcachon par les insecticides et les herbicides sur la période 2005-2006. Impact environnemental
Provedor de dados: 5
Autores: Auby, Isabelle; Bocquene, Gilles; Quiniou, Francoise; Dreno, Jean-paul.
Within the framework of the study on cup oyster breeding in the Arcachon Basin (IFREMER's SURGIBA Programme, co-financed by Europe, the Regional Council of Aquitaine, the Regional Council of Gironde and the Arcachon Basin's inter-communal Syndicate), some pesticides have been researched in the main waterways and in the waters of several of the Basin's zones (Figure 1), during the summer months (June to September) from 1999 to 2003 inclusive (Auby and Maurer, 2004). The presence of a certain number of molecules, mainly from herbicides, was found in the waters and it has generally been possible to identify their source. Certain substances come from agricultural uses or park maintenance; others are from nautical sources (anti-fouling paint for protecting the...
Tipo: Text
Palavras-chave: France; Arcachon basin; Hydrology; Chlorpyfiros; Chlorpyfiros; Insecticide; Weedkiller; Contamination; Marine environment.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-2398.pdf

Anthropogenic disturbance on nursery function of estuarine areas for marine species
Provedor de dados: 5
Autores: Courrat, A.; Lobry, Jeremy; Nicolas, D.; Laffargue, Pascal; Amara, R.; Lepage, M.; Girardin, M.; Le Pape, O.
Estuaries serve as nursery grounds for many marine fish species. However increasing human activities within estuaries and surrounding areas lead to significant habitat loss for the juveniles and decrease the quality of the remaining habitats. This study is based on the data of 470 beam trawls from surveys that were conducted in 13 French estuaries for the purpose of the European Water Framework Directive. It aimed at testing the effects of anthropogenic disturbances on the nursery function of estuaries. With a multispecific approach based on ecological guilds, two fish metrics, abundance and species richness of Marine juvenile migrant fishes, were used as proxies for the estuarine nursery function. Indices of heavy metal and organic contaminations were...
Tipo: Text
Palavras-chave: Contamination; Anthropogenic disturbances; Fish indicators; Estuaries; Nursery grounds; Essential fish habitat.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6291.pdf

Impacts des substances chimiques sur l’écosystème. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Knoery, Joel.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Substances chimiques; Impacts; Contamination; Bioindication; Imposex; Hot spots.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43867/43441.pdf

Evaluation économique des dommages liés à la  contamination microbiologique des eaux côtières  Le cas de la conchyliculture
Provedor de dados: 5
Autores: Roncin, Nicolas; Kervarec, Fabienne; Boncoeur, Fabienne.
Tipo: Text
Palavras-chave: Mussel culture; Monitoring; Contamination; Economic impact; Coastal water; Marine pollution; Shellfish culture; SEM; Conchyliculture; Developpement economique; Surveillance; Controle microbiologique; Contamination.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-1739.pdf

Spirolide uptake and detoxification by Crassostrea gigas exposed to the toxic dinoflagellate Alexandrium ostenfeldii
Provedor de dados: 5
Autores: Medhioub, Walid; Lassus, Patrick; Truquet, Philippe; Bardouil, Michele; Amzil, Zouher; Sechet, Veronique; Sibat, Manoella; Soudant, Philippe.
Oysters (Crassostrea gigas) were exposed 4 days to cultures of the toxic dinoflagellate Alexandrium ostenfeldii (strain CCMP1773) that produces spirolides belonging to fast acting toxins (FAT) and let depurate for 7 days. During depuration, oysters were either fed the non-toxic algae Isochrysis galbana Tahitian clone (T. Iso) or starved. The objectives of this experiment were to evaluate (i) spirolide uptake and depuration by oysters (ii) spirolide effects on oysters and (iii) oyster recovery according to food supply during depuration. A. ostenfeldii cells were filtered and ingested by oysters while faeces contained numerous intact cells of the toxic diet. This suggested that ingested cells were not totally digested by oysters. Contents of spirolides (SPX)...
Tipo: Text
Palavras-chave: Spirolides; Alexandrium ostenfeldii; Contamination; Depuration; Crassostrea gigas; Inflammatory responses.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00098/20953/18740.pdf

Etude sanitaire du Havre du Payré (1989-1993) et qualité des coquillages commercialisés (1980-1991)
Provedor de dados: 5
Autores: Allenou, Jean-pierre; Pezeron, Annie; Dumont, Francoise; Menanteau, Chantal.
Le Havre du Payré situé au sud des Sables d'Olonne abrite une zone ostréicole de production modeste (1 000 tonnes en 1992). Le réseau de surveillance du milieu marin mis en place par l'IFREMER en 1989 a mis en évidence des épisodes de contamination important sur ce site. Les niveaux atteints en 1992 ont entraîné la fermeture de la zone. Une dynamique s'est alors mise en place entre les diverses Administrations et l'IFREMER a réalisé un suivi intensif sur les trois derniers mois de l'année 1993.
Tipo: Text
Palavras-chave: Hâvre du Payré; Coliformes fécaux; Surveillance microbiologique; Etablissement d'expédition; Contamination.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00081/19212/16807.pdf

Impacts des substances chimiques sur l’écosystème. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Knoery, Joel.
Tipo: Text
Palavras-chave: Méditerranée; Substances chimiques; Impacts; Contamination; Poissons; Bioindication.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44236/43805.pdf

Relationships between sediments and tissue contamination and allozymic patterns in Hediste diversicolor (Polychaeta Nereididae) in the Pialassa lagoons (north Adriatic Sea)
Provedor de dados: 5
Autores: Virgilio, M; Baroncini, N; Trombini, C; Abbiati, M.
An increasing number of investigations revealed that responses of populations to environmental stressors may be genetically dependent. Occurrence of genetic adaptation to high concentrations of heavy metals in Hediste diversicolor local ecotypes has also been hypothesised. Analyses of allozymic patterns are a promising tool for the genetic monitoring of environmental stressors. The aim of this study was to investigate whether the allozymic patterns of H. diversicolor could be affected by levels of contamination. Five sites were investigated: four in a polluted brackish habitat, the Pialassa lagoons, and a reference site in the Lamone estuary. Total mercury was used as a tracer of the overall level of contamination. Concentrations of mercury were quantified...
Tipo: Text
Palavras-chave: Hediste diversicolor; Contamination; Structure génétique; Adaptation; Systèmes enzymatiques; Hediste diversicolor; Contamination; Genetic structure; Adaptation; Allozyme.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00322/43288/43023.pdf

Bioaccumulation of trace elements in pelagic fish from the Western Indian Ocean
Provedor de dados: 5
Autores: Kojadinovic, Jessica; Potier, Michel; Le Corre, Matthieu; Cosson, Richard P.; Bustamante, Paco.
Trace elements were analyzed in fish of commercial interest to determine their importance in marine systems of the Western Indian Ocean and their bioaccumulation patterns. The results are equivalent or lower than levels reported in ichthyofauna worldwide. Certain values of muscular Cd, Hg, Pb and Zn were, however, above thresholds for human consumption. Levels varied among tissues, species and fish length, but were seldom influenced by the nutritional condition of the fish, its gender and its reproductive status. Correlations between hepatic Hg and Se levels in Swordfish (r(2) = 0.747) and Yellowfin Tunas (r(2) = 0.226), and among metallothionein linking metals imply the existence of detoxification processes in these species. Level differences between fish...
Tipo: Text
Palavras-chave: Guidelines; Detoxification; Contamination; Fish; Metals.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2490.pdf

Silver European eels health in Mediterranean habitats
Provedor de dados: 5
Autores: Amilhat, Elsa; Fazio, Geraldine; Simon, Gael; Manetti, Marc; Paris, Severine; Delahaut, Laurence; Farrugio, Henri; Lecomte-finiger, Raymonde; Sasal, Pierre; Faliex, Elisabeth.
The degradation in the quality of silver eel and their health could have been a major factor in the collapse of the European eel (Anguilla anguilla) population. However, the health status of the spawners has been poorly studied until now. This study evaluated the quality of migrant male silver eels from four Mediterranean habitats in France presenting different degrees of contamination: Canet-Saint-Nazaire, Salses-Leucate and Bages-Sigean lagoons and La Berre River. We considered pathogens including Anguillicoloides crassus and EVEX virus and the concentration of chemical contaminants including PCBs, OCs and heavy metals. Our study results revealed different patterns of pollution and infection in the four habitats, with high individual variability. No...
Tipo: Text
Palavras-chave: Anguilla anguilla; Mediterranean lagoons; Silver eel; Contamination; Spawner quality; Pathogens.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00171/28252/26543.pdf

L'arsenic en milieu marin. Biogeochimie et ecotoxicologie
Provedor de dados: 5
Autores: Michel, Pierre.
Arsenic levels of in the marine environment are high in comparison with other contaminants. Over the past twenty years, a large number of arsenic organic compounds have been identified in the water, sediments and living species. This document constitutes a synthesis of current knowledge on arsenic sources, and contamination levels, on its biogeochemical cycle as well as its toxic effects on human and marine fauna. This paper highlights in particular the effects of phosynthesis on arsenic speciation and its distribution throughout the marine environment. Problems of toxicity in the case of certain phyto- and zooplankton species are identified. Bioaccumulation in seaweeds, molluscs and fishes is documented as well, with special attention to the species...
Tipo: Text
Palavras-chave: Ecotoxicology; Contamination; Biogeochemistry; Arsenic; Ecotoxicologie; Contamination; Biogéochimie; Arsenic.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/rapport-1448.pdf

State of the science and the way forward for the ecotoxicological assessment of contaminated land
Provedor de dados: 86
Autores: Kuperman,Roman G.; Checkai,Ronald T.; Garcia,Marcos Vinicius Bastos; Römbke,Jörg; Stephenson,Gladys L.; Sousa,José Paulo.
Over the past two decades, soil ecotoxicologists have made strides in utilizing the basic concepts and advancements in soil zoology and ecology. They have applied the existing tools, and developed new ones to investigate how chemical contamination can affect soil ecosystems, including the degradation or destruction of soil quality and habitats or the diminishment of belowground biodiversity. Soil ecotoxicologists are applying a suite of standard protocols, originally developed as laboratory tests with single chemicals (e.g., pesticides), and further enhancing both the approaches and protocols for the assessment of contaminated lands. However, ecological relevance of some approaches remains unresolved. The authors discuss the main challenges for a coherent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contamination; Ecological relevance; Ecological risk assessment; Soil pollution; Terrestrial model ecosystems; Toxicity tests.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800004

Development of ic-Elisa for the screening of aflatoxin contamination in the peanut production chain
Provedor de dados: 86
Autores: Silva,André Ribeiro da; Zanin,Lívia Montanheiro Médici; Ishikawa,Angélica Tieme; Yamashita,Cassia Reika Takabayashi; Fracalossi,Felipe Pedote; Amorim,Thaís Marques; Itano,Eiko Nakagawa; Kawamaura,Osamu; Hirooka,Elisa Yoko.
Abstract: The objective of this work was to standardize and validate an indirect competitive enzyme-linked immunosorbent assay (ic-Elisa), as a low-cost tool, to monitor the presence of aflatoxin in common and blanched peanuts (Arachis hypogaea) in the production chain. The presence of aflatoxin B1, moisture content, and water activity were analyzed in 60 samples of the peanut cultivar Runner IAC 886, from the 2014/2015 and 2015/2016 harvests of the region of Alta Paulista, in the state of São Paulo, Brazil. The validation showed an adequate linearity (R2 = 0.999), and limits of detection and quantification of 1.13 and 3.59 μg kg-1, respectively. Recovery rates of 104, 102, and 107% at the concentrations of 4, 10, and 20 μg kg-1 aflatoxin B1, respectively,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aspergillus; Aflatoxin B1; Blanched peanuts; Contamination; Mycotoxin.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000300361

Coliform density in oyster culture waters and its relationship with environmental factors
Provedor de dados: 86
Autores: Mignani,Luciene; Barbieri,Edison; Marques,Helcio Luis de Almeida; Oliveira,Ana Julia Fernandes Cardoso de.
The objective of this work was to evaluate the total and thermotolerant coliform densities in the oyster culture water of Cananeia, SP, Brazil, correlating these densities with environmental variables and tidal variations. Superficial water samples were collected in two tide conditions (spring and neap) from three areas of Cananéia municipality (Mandira, Itapitangui and Cooperostra). The three studied areas showed good conditions for the culture regarding coliform densities. The two tidal conditions differed significantly as to total coliform concentration; however, the same procedure was not performed for thermotolerant coliforms. No correlation was observed between water temperature, pH, and concentrations of total and thermotolerant coliforms. Coliform...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crassostrea; Contamination; Microbiology; Principal component analysis; Total and thermotolerant coliforms.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000800007

Brownfields Redevelopment in Wisconsin: A Survey of the Field
Provedor de dados: 31
Autores: Wernstedt,   Kris; Crooks,   Lisa; Hersh,   Robert.
As the third paper in our three-part series on Wisconsin brownfields, this paper reports the results of a survey on the objectives of brownfields redevelopment, constraints to the redevelopment, the role of the state's Department of Natural Resources (DNR), and institutional controls. The 260 survey respondents include elected officials, staff from economic development and planning agencies, attorneys, private sector representatives, and professionals at nonprofit organizations. We find that: 1) respondents value both economic and environmental gains associated with brownfields redevelopment; 2) the high costs of cleanup are the principal barrier to brownfields redevelopment; 3) no single factor stands out as constraining DNR's ability to oversee cleanups;...
Tipo: Working or Discussion Paper
Palavras-chave: Brownfields; Contamination; Hazardous waste; Regulatory reform; Environmental Economics and Policy; Q24; Q28.
Ano: 2003
URL: http://purl.umn.edu/10443

The Brownfields Phenomenon: Much Ado about Something or the Timing of the Shrewd?
Provedor de dados: 31
Autores: Wernstedt,   Kris; Heberle,   Lauren; Alberini,   Anna; Meyer,   Peter.
This paper provides an overview of the cleanup and redevelopment of contaminated properties known as "brownfields." It has three principal parts. First, we introduce the brownfields phenomenon and its drivers, drawing on the body of available empirical evidence to discuss characteristics of individual brownfield redevelopment projects. Second, we present findings from a recent study we have conducted that examines the relative attractiveness to private developers of public interventions to promote brownfields redevelopment. Third, we briefly summarize some of the problems with brownfields development and policy and propose an approach to promote wider societal benefits of brownfields development. We conclude with several broad questions about brownfields...
Tipo: Working or Discussion Paper
Palavras-chave: Brownfields; Contamination; Economic development; Infill; Environmental Economics and Policy; Q24; Q28.
Ano: 2004
URL: http://purl.umn.edu/10660

Brownfields Redevelopment in Wisconsin: Program, Citywide, and Site-Level Studies
Provedor de dados: 31
Autores: Wernstedt,   Kris; Hersh,   Robert.
In this paper, the second installment of our three-part study on the development of brownfields policy in the state of Wisconsin, we use case studies to explore the implementation of the policy at three scales: 1) two statewide initiatives, the Voluntary Party Liability Exemption process and the Sustainable Urban Development Zone program; 2) the efforts of two Wisconsin cities, West Allis and Wausau, to promote brownfields redevelopment across their neighborhoods; and 3) project-specific uses of institutional, regulatory, and financial innovations to encourage the revitalization of specific areas. Throughout the paper, we focus on the role of economic incentives, regulatory flexibility, regulatory structure, and the behavioral culture of brownfields...
Tipo: Working or Discussion Paper
Palavras-chave: Brownfields; Contamination; Hazardous waste; Regulatory reform; Wisconsin; Environmental Economics and Policy; Q24; Q28.
Ano: 2003
URL: http://purl.umn.edu/10547

Use of lytic bacteriophages to reduce Salmonella Enteritidis in experimentally contaminated chicken cuts
Provedor de dados: 89
Autores: Fiorentin,L; Vieira,ND; Barioni Júnior,W.
Reducing Salmonella contamination in poultry is of major importance to prevent the introduction of this microorganism into the food chain. Salmonellae may spread during storage time (shelf life) whenever pre-harvest control fails or post-harvest contamination occurs. Therefore, preventive measures should also be used in the post-harvest level of poultry production in order to control salmonellae. Chicken skin samples were experimentally contaminated by immersing whole legs (thighs and drumsticks) in a suspension containing 10(6) colony forming units per milliliter (CFU/mL) of Salmonella Enteritidis phage type 4 (SE PT4) at the slaughter day. One day later, samples from one group were immersed in a suspension pool containing 10(9) CFU/mL of each of three...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacteriophages; Contamination; Salmonella; Poultry; Skin.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000400010

Effect of the litter material on drinking water quality in broiler production
Provedor de dados: 89
Autores: Garcia,RG; Almeida,Paz ICL; Caldara,FR; Nääs,IA; Pereira,DF; Freitas,LW; Schwingel,AW; Lima,NDS; Graciano,JD.
Considering the importance of drinking water and its effect on broiler performance, drinking water quality was studied using six different litter materials. The presence of coliform bacteria and Escherichia coli was investigated. The following litter materials were used in the trial: wood shavings, rice husks, chopped Napier grass (Pennisetum pupureum), 50% sugarcane bagasse (Saccharum L.) + 50% wood shavings, 50% sugarcane bagasse (Saccharum L.) + 50% rice husks, and plain sugarcane bagasse (Saccharum L.). A number of 1620 Ross® one-day-old chicks were reared in 54 pens measuring 4.5 m² each, equipped with a bell drinker and a tube feeder. Water samples were collected in sterile tubes on days 28 and 42 of the rearing period, and submitted to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler health; Contamination; Welfare.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000300005

BRACHIARIA IN SELENIUM-CONTAMINATED SOIL UNDER SULPHUR SOURCE APPLICATIONS
Provedor de dados: 90
Autores: Faria,Letícia de Abreu; Luz,Pedro Henrique de Cerqueira; Macedo,Felipe Barros; Tonetti,Paulo Sergio; Ferraz,Marcos Roberto; Mazza,Jairo Antônio; Vitti,Godofredo Cesar.
ABSTRACT High contents of plant-available selenium in the soil in the form of selenate, resulting from natural or anthropogenic action, jeopardizes agricultural areas and requires research for solutions to establish or re-establish agricultural or livestock operation, avoiding the risk of poisoning of plants, animals and humans. The purpose was to evaluate sulfur sources in the form of sulfate, e.g., ammonium sulfate, calcium sulfate, ferric sulfate, in the remediation of tropical soils anthropogenically contaminated with Se under the tropical forage grass Brachiaria brizantha (Hochst. ex A. Rich.) Stapf cv. Marandu. More clayey soils are less able to supply plants with Se, which influences the effects of S sources, but it was found that high soil Se...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contamination; Selenate; Remediation; Toxicity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601814

Heavy metals in soils and plants in mango orchards in Petrolina, Pernambuco, Brazil
Provedor de dados: 90
Autores: Silva,João Paulo Siqueira da; Nascimento,Clístenes Williams Araújo do; Biondi,Caroline Miranda; Cunha,Karina Patrícia Vieira da.
The monitoring of heavy metal concentrations in areas under intensive agriculture is essential for the agricultural sustainability and food safety. This paper evaluates the total contents of heavy metals in soils and mango trees in orchards of different ages (6, 7, 8, 9, 10, 11, 14, 16, 17, 19, and 26 years) in Petrolina, Pernambuco, Brazil. Soil samples were taken from the layers 0-20 cm and 20-40 cm, and mango leaves were collected in the growth stage. Areas of native vegetation (Caatinga) adjacent to the cultivated areas were used for comparison. The total concentrations of heavy metals (Cu, Cr, Fe, Zn, Mn, Ni, and Pb) were determined in soils and leaves. In general, mango cultivation led to Cu and Zn accumulation in the soil surface and to a reduction...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trace elements; Agricultural inputs; Guiding values; Contamination.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000400028

Radionuclides and heavy metal contents in phosphogypsum samples in comparison to cerrado soils
Provedor de dados: 90
Autores: Jacomino,Vanusa Maria Feliciano; Oliveira,Kerley Alberto Pereira de; Taddei,Maria Helena Tirollo; Siqueira,Maria Célia; Carneiro,Maria Eleonora Deschamps Pires; Nascimento,Marcos Roberto Lopes; Silva,David Faria da; Mello,Jaime Wilson Vargas de.
Phosphogysum (PG) or agricultural gypsum, a solid waste from the phosphate fertilizer industry, is used as soil amendment, especially on soils in the Cerrado region, in Brazil. This material may however contain natural radionuclides and metals which can be transferred to soils, plants and water sources. This paper presents and discusses the results of physical and chemical analyses that characterized samples of PG and compares them to the results found in two typical soils of the Cerrado, a clayey and sandy one. These analyses included: solid waste classification, evaluation of organic matter content and of P, K, Ca, Mg, and Al concentrations and of the mineralogical composition. Natural radionuclides and metal concentrations in PG and soil samples were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphogysum; Soil fertility; Radionuclides; Metals; Contamination.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000500038

Performance and intestinal health of broilers inoculated with nalidixic acid-resistant Salmonella Typhimurium and treated with organic acids
Provedor de dados: 96
Autores: Rocha,Tatiane Martins; Andrade,Maria Auxiliadora; Souza,Eliete Silva e; Stringhini,José Henrique; Café,Marcos Barcellos; Rezende,Cíntia Silva Minafra e; Pôrto,Regiani Nascimento Gagno.
An experiment with 630 one-day-old chicks experimentally inoculated with Salmonella Typhimurium was performed to evaluate the effects of an organic acid blend (benzoic, fumaric and 2-hydroxi-4-methylltio-butanoic - HMTBa) on intestinal health and performance. The experimental challenge with Salmonella Typhimurium occurred in two different routes of administration: via crop on the first day after hatching, and via feed, offered from seven to 14 days of age. These groups were treated with organic acids in a 3 × 2 (agent versus acid) factorial arrangement. Chicks treated with organic acids had higher weight gain, mean live weight and better feed conversion at 14 days of age, and higher weight gain at 28 days of age. Chicks treated with organic acids...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Birds; Contamination; Control feed; Conversion; Salmonellosis.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200023

POLYMERASE CHAIN REACTION DETECTION OF AVIAN LEUKOSIS VIRUS DNA IN VACCINES USED IN POULTRY
Provedor de dados: 101
Autores: Acevedo,Ana María; Rodríguez,Edisleidy; Uffo,Odalys; Relova,Damarys; Noda,Julia; Díaz de Arce,Heidy.
Avian leukosis viruses (ALV) provoke a variety of trasmissible bening and malign tumoral diseases affecting birds. Chickens are affected by six subgroups of ALV designs A, B, C, D, E and J of more recent world dissemination. These viruses are potential contaminants of live vaccines used in poultry. In order to research the presence of DNA from ALVs as contaminants of viral commercial vaccines to be used in poultry, different Marek´s disease vaccines were screened by a reported polymerase chain reaction (PCR) assay designed to detect all subgroups of ALVs. DNA samples extracted from seven vaccines were submitted to PCR using primers for a conserved region of env gene of HPRS-103. ALV sequences were detected in seven samples (100%). The methodology employed...
Tipo: Journal article
Palavras-chave: Avian leukosis virus (ALV); Polymerase chain reaction (PCR); Vaccine; Contamination; Poultry.
Ano: 2009
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2009000100011

Heavy metals in vegetables and potential risk for human health
Provedor de dados: 63
Autores: Guerra,Fernando; Trevizam,Anderson Ricardo; Muraoka,Takashi; Marcante,Nericlenes Chaves; Canniatti-Brazaca,Solange Guidolin.
Ingestion of vegetables containing heavy metals is one of the main ways in which these elements enter the human body. Once entered, heavy metals are deposited in bone and fat tissues, overlapping noble minerals. Slowly released into the body, heavy metals can cause an array of diseases. This study aimed to investigate the concentrations of cadmium, nickel, lead, cobalt and chromium in the most frequently consumed foodstuff in the São Paulo State, Brazil and to compare the heavy metal contents with the permissible limits established by the Brazilian legislation. A value of intake of heavy metals in human diets was also calculated to estimate the risk to human health. Vegetable samples were collected at the São Paulo General Warehousing and Centers Company,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contamination; Food chain; Potentially toxic element; Daily intake; Consumption habit.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000100008

Chemical amendment and phytostabilization of an industrial residue contaminated with Zn and Cd
Provedor de dados: 63
Autores: Santos,Fabiana Soares dos; Magalhães,Márcio Osvaldo Lima; Mazur,Nelson; Amaral Sobrinho,Nelson Moura Brasil do.
Phytostabilisation of a contaminated soil with heavy metals is considered a very appropriate technology to reduce erosion and dispersion of contaminants. A greenhouse study was conducted to evaluate the effects of both chemical amendments (calcium silicate and brewery sludge), and phytoremediation using the grass Brachiaria decumbens, on an industrial residue contaminated with Zn and Cd (industrial residue). Industrial residue samples placed into 30 L containers were amended with 20% brewery sludge, calcium silicate (2%, 3%), and 20% of brewery sludge + calcium silicate (2.5%, 4%), and were compared to the control treatment (non-amended residue). After pH stabilization, B. decumbens plants were grown on all treatments in order to evaluate the ability of...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Phytoremediation; Inertization; Contamination; Heavy metals.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000500008

Incidence of aflatoxin in corn
Provedor de dados: 106
Autores: Prisnar Siriacha; Arunsri Wong-Urai; Prawat Tonboon-Ek; Dara Buangsuwon.
5 tables
Palavras-chave: Corn; Maize; Aflatoxins; Fungi; Aspergillus; Fusarium; Botryodiplodia; Penicillium; Contamination; Fields; Storage houses; ข้าวโพด; อะฟลาทอกซิน; เชื้อรา; แอสเปอร์จิลลัส; ฟูซาเรียม; โบทริโอดิพโพลเดีย; เพนนิซิเลียม.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4092

ชุดตรวจสอบการปลอมปนข้าวหอมมะลิ
Provedor de dados: 106
Autores: Janya Saengkiew; Kongsak Srikaew.
Amylose is one of the indicators to examine the purity of Hom Mali Rice. This research developed the test kit for determination of contaminated Hom Mali Rice. The test kit is based on the blue iodine’s color which is changed in according to amylose content. It was found that the suitable test kit composed of the steps for sample preparation which included preparing milled-white rice before they were subject to lipid removal by washing with ether. Iodine solution was used to develop the color for the prepared samples. The colors of the samples were compared with the established color bands and the levels of contaminations could be judged. The test kit has been evaluated and it was found to be effective.
Tipo: Collection
Palavras-chave: Hom mali rice; Test kit; Amylose; Contamination; Indicators; ข้าวหอมมะลิ; ชุดตรวจสอบการปลอมปน; ปริมาณแอมิโลส; ดัชนีบ่งชี้; การทดสอบการใช้งาน; แถบสี.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5332

Biochemical characterization of systemic bacteria in bananas, sensitivity to antibiotics and plant phytotoxicity during shoot proliferation
Provedor de dados: 1
Autores: Oliveira, Janiffe Peres de; Scherwinski-Pereira, Jonny Everson.
The objective of this work was to characterize the biochemically systemic bacterial isolated from banana plants, to evaluate the bacterial sensitivity to antibiotics, and to determine the phytotoxicity of banana shoots during in vitro proliferation. Systemic bacteria belonging to the Klebsiella and Aeromonas genera were isolated from the “Maravilha” (FHIA 01 AAAB), “Preciosa” (PV 4285 AAAB) and “Thap Maeo” (AAB) varieties and were then characterized. Tests of shoot sensitivity to antibiotics were performed, and the minimum inhibitory concentration (MIC) and phytotoxic effects of selected antibiotics to plants were determined. Among the 20 antibiotics evaluated, the strains showed sensitivity to cefaclor, cefalexin, cefalotin, nalidixic acid,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências agrárias Musa spp.; Micropropagação; Contaminação; Controle microbiano. Produção de mudas Musa spp.; Micropropagation; Contamination; Endophytic microorganisms; Antimicrobial control.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/27689

Pesticides in the propolis at São Saulo State, Brazil - doi: 10.4025/actascianimsci.v34i4.15859
Provedor de dados: 2
Autores: Orsi, Ricardo Oliveira; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Barreto, Lidia Maria Ruv Carelli; Universidade de Taubaté; Gomes, Silvia Maria Alves; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Kadri, Samir Moura; Universidade Estadual Paulista “Júlio de Mesquita Filho”.
The increasing demand for propolis has caused a raise in its production. However, an increasingly pesticide-dependent agriculture is a great concern with regard to bees, their produce and environmental contamination. Current analysis evaluates the presence of pesticides (organochlorines, organophosphates, pyrethroids, carbamates, herbicides, fungicides and acaricides) in samples of propolis from the state of São Paulo, Brazil. Beekeepers from several localities in the state provided samples of propolis (50), which were collected, stored in non-toxic plastic bags and maintained in a freezer for analyses. Possible pesticide residues were examined by gas chromatography method but no pesticide residues were detected in the examined propolis samples. Propolis...
Tipo: Pesquisa de campo; análise laboratorial
Palavras-chave: 5.04.00.00-2; 5.07.01.05-3; 4.06.00.00-9 environmental; Apis mellifera; Agrochemicals; Contamination environmental; Apis mellifera; Agrochemicals; Contamination.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/15859

Presence of parasitic structures in lettuces served in self-service restaurants of São Miguel do Oeste, Santa Catarina State, Brazil
Provedor de dados: 3
Autores: Vidigal, Tiago Mateus Andrade; Landivar, Elaine Eloiza Cortellini.
Consuming raw food like lettuce may carry protozoa cysts and helminth eggs, causing parasitic infections. Therefore, the parasitological analysis of this type of food it’s important for public health because it provides data on the hygiene conditions in which these vegetables were produced, transported, processed and handled until the ingestion. This study aimed to evaluate the occurrence of parasitic structures in samples of lettuce (Lactuca sativa) sold in self-service restaurants in São Miguel do Oeste, Santa Catarina State, Brazil. The samples were randomly collected in 20 locations in duplicate, prepared according to the method of Hoffman, Pons, and Janer (1934) and analyzed with an optical light microscopy. The parasitic structures found were Cysts...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Protozoa; Helminths; Contamination; Food; Vegetables.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/35027

Socio-environmental and microbiological assessment of the river Piancó, Pombal, Brazil
Provedor de dados: 3
Autores: Lacerda, Eulina Kelly Guilherme; Silva, Edevaldo da; Medeiros, Rosália Severo.
The River Piancó in the municipality of Pombal on the western stretch of the state of Paraíba, Brazil, receives contaminated effluents. Current assay evaluates the microbiological quality of the river water and analyzes the social and environmental aspects of the riverine community with regard to the water and its use of the river. The water´s microbiological quality was verified at four sites on the river in five two-monthly collections throughout the year (totaling 20 samples) for the following analyses: Most Probably Number (MPN), Total (TC) and Fecal Coliform (FC) and identification of Escherichia coli. The social and environmental aspects were assessed by a 15-question questionnaire given to thirty homes. Results report Fecal Coliforms (&gt; 240 to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 92700004; 2.00.00.00-6 water resources; Coliforms; Contamination; Effluents; Perception environmental 92700004; 2.12.00.00-9.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/29676

The impacts of land use changes in the mercury flux in the Madeira River, Western Amazon
Provedor de dados: 42
Autores: Lacerda,Luiz D.; Bastos,Wanderley R.; Almeida,Marcelo D.
Changes in hydrochemistry and Hg distribution in the Madeira River from Porto Velho to the confluence with the Amazon River were studied in two cruises in 1997 and 2002. Water conductivity was similar in both periods, but the pH was significantly higher in 2002, in particular along the middle reaches of the river. Total suspended matter concentrations also increased from 1997 to 2002 along the same river portion, which is a result of forest conversion to other land uses, in particular pastures and agriculture accelerated during the interval between the cruises. Dissolved Hg concentrations were similar along the river in both cruises, but particulate Hg concentrations increased significantly along the middle portion of the river, although the suspended...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Deforestation; Mercury; Hydrochemistry; Contamination; Amazon.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100007

Polychlorinated Biphenyl (PCB) congener concentrations in aquatic birds. Case study: Ilha Grande Bay, Rio de Janeiro, Brazil
Provedor de dados: 42
Autores: FERREIRA,ALDO PACHECO.
Livers from 108 birds found prostrate or dead in Ilha Grande Bay between 2005 and 2010 were analyzed for 16 PCB congeners (IUPAC numbers 8, 18, 28, 31, 52, 77, 101, 118, 126, 128, 138, 149, 153, 169, 170, and 180). The species analyzed were Egretta caerulea(Linnaeus 1758), Nycticorax nycticorax (Linnaeus 1758),Egretta thula (Molina 1782), and Ardea cocoi(Linnaeus 1766). The analysis were performed using Origin software (7.5, 2004) with a significant level of p&lt;0.05. Data were checked for adherence to the standard assumptions of parametric tests using the Kolmogorov-Smirnov test for normality and the Levene's test for homogeneity of variances. This has revealed differences in concentration for some congeners. Results indicate relatively low PCBs...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contamination; Ilha Grande Bay; Polychlorinated biphenyl; Risk to environment and health; Aquatic birds.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401379

Toxicity and motor changes in Africanized honey bees (Apis mellifera L.) exposed to fipronil and imidacloprid
Provedor de dados: 42
Autores: BOVI,THAÍS S.; ZALUSKI,RODRIGO; ORSI,RICARDO O.
ABSTRACT This study evaluated the in vitro toxicity and motor activity changes in African-derived adult honey bees (Apis mellifera L.) exposed to lethal or sublethal doses of the insecticides fipronil and imidacloprid. Mortality of bees was assessed to determine the ingestion and contact lethal dose for 24 h using probit analysis. Motor activities in bees exposed to lethal (LD50) and sublethal doses (1/500th of the lethal dose) of both insecticides were evaluated in a behavioral observation box at 1 and 4 h. Ingestion and contact lethal doses of fipronil were 0.2316 ? 0.0626 and 0.0080 ? 0.0021 μg/bee, respectively. Ingestion and contact lethal doses of imidacloprid were 0.1079 ? 0.0375 and 0.0308 ? 0.0218 μg/bee, respectively. Motor function of bees...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environment; Pesticides; Pollinators; Contamination; Phenylpyrazoles; Neonicotinoids.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100239

Bioaccumulation of mercury, cadmium, zinc, chromium, and lead in muscle, liver, and spleen tissues of a large commercially valuable catfish species from Brazil
Provedor de dados: 42
Autores: Arantes,Fábio P.; Savassi,Lourenço A.; Santos,Hélio B.; Gomes,Marcos V.T.; Bazzoli,Nilo.
The increasing amounts of heavy metals entering aquatic environments can result in high accumulation levels of these contaminants in fish and their consumers, which pose a serious risk to ecosystems and human health. We investigated the concentrations of mercury (Hg), cadmium (Cd), zinc (Zn), chromium (Cr), and lead (Pb) in muscle, liver, and spleen tissues of Pseudoplatystoma corruscans specimens collected from two sites on the Paraopeba River, Brazil. The level of heavy metals concentrations in the tissues was often higher in viscera (i.e. liver and spleen) than in muscle, and thus, the viscera should not be considered for human consumption. Correlations between metal concentrations and fish size were not significant. Although the levels of muscle...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contamination; Freshwater fish; Heavy metal; Human health.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100137

Microbiological, chemical, physical, and proteolytic activities of raw milk after thermal processing
Provedor de dados: 45
Autores: Milaneze,H.S.; Silva,L.S.; Kottwitz,L.B.M.; Zambom,M.A.; Fonseca,L.M.; Guimarães,A.T.B.; Pozza,M.S.S.
ABSTRACT The aim was to evaluate the microbiological, chemical- physical, and shelf-life quality of milk samples after pasteurization (HTST) for 10 days or ultra-high temperature (UHT) treatment for 120 days. Raw milk counts of mesophilic aerobic microorganisms, Staphylococcus spp. and thermotolerant coliforms before HTST and UHT processing were 6.73 and 7.77; 2.84 and 4.30, and 4.68 and 4.37log10, respectively. Pseudomonas spp. were found in raw milk samples. No presence of any other microorganisms studied was detected and no microbial inhibitor was found. Processed samples met microbiological legal requirements. However, aerobic mesophilic counts for HTST pasteurized milk samples stored for 5 and 10 days increased to values comparable to those in raw...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contamination; Caseinomacropeptide; Heat treatment.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000501625

Action of Canavalia ensiformis in remediation of contaminated soil with sulfentrazone
Provedor de dados: 53
Autores: Madalão,João Carlos; Souza,Matheus Freitas de; Silva,Alberto Antônio; Silva,Daniel Valadão; Jakelaitis,Adriano; Pereira,Gustavo Antônio Mendes.
ABSTRACT This study evaluated the jack bean (Canavalia ensiformis) as a potential remediator of sulfentrazone in the soil. The experiment was conducted under field conditions in a complete randomised block design. The treatments consisted of soils with and without herbicide application as well as the absence and presence of C. ensiformis cultivation associated with incorporation into the soil or the removal of shoots of C. ensiformis. Sorghum was planted as a bioindicator to evaluate the remediation efficiency of jack bean. Sulfentrazone application in areas without C. ensiformis cultivation decreased plants stands, productivity, and height of sorghum compared to treatments where C. ensiformis was cultivated. Sorghum cultivated in succession to C....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioremediation; Soil decontamination; Herbicides; Residue; Contamination.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000200292

The abundance of some pathogenic bacteria in mangrove habitats of Paraiba do Norte estuary and crabmeat contamination of mangrove crab Ucides cordatus
Provedor de dados: 52
Autores: Grisi,Teresa Cristina Soares de Lima; Gorlach-Lira,Krystyna.
Study on mangrove water and sediment of Paraiba do Norte river (Northeastern Brazil) and crabmeat of Ucides cordatus was carried to investigate the relation between the abundance of bacteria in the mangrove habitat and in the crabmeat. Simultaneous collection of samples of water, sediment and crabs (U. cordatus) was done during the rainy and dry seasons at two areas of mangroves that differed in influence of tide and sewage discharge. The numbers of total heterotrophic bacteria in the mangrove water were between 0.04 and 6 log CFU 100mL-1, and in the sediment between 5 and 6 log CFU g-1. The location closer to waste discharge showed higher incidence of total heterotrophic bacteria, coliforms, Staphylococcus aureus and Salmonella spp. The counts of total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mangrove ecosystem; Bacteria; Ucides cordatus; Crabmeat; Contamination.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100028

Influence of effluents from a Wastewater Treatment Plant on nutrient distribution in a coastal creek from southern Brazil
Provedor de dados: 52
Autores: Santos,Isaac Rodrigues; Costa,Ronaldo Cataldo; Freitas,Ubiratan; Fillmann,Gilberto.
The hypothesis that effluents treated through activated sludge process cause changes in nutrient biogeochemistry of receiving water bodies was investigated in Vieira creek, southern Brazil. Dissolved oxygen, suspended matter, and pH did not vary among the sampling stations. Nutrient, biochemical oxygen demand, and conductivity values were significantly higher downstream from the Wastewater Treatment Plant (WWTP) effluents. Further downstream, nitrate concentrations were higher due to ammonium nitrification, organic matter remineralization and/or the occurrence of unidentified sources. Per capita nutrient emission factors were estimated to be 0.16 kg P.yr-1 and 4.14 kg N.yr-1. Under pristine conditions, low N:P ratios were observed, which were significantly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Activated sludge; Nutrients; Contamination; Coastal zone; Biogeochemistry; Eutrophication.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100019

Assessment of chromium contamination in the Monte Alegre stream: a case study
Provedor de dados: 52
Autores: Corbi,Juliano José; Santos,Felipe André dos; Zerlin,Ricardo; Santos,Ademir dos; Froehlich,Claudio Gilberto; Trivinho-Strixino,Susana.
The aim of this work was to study the contamination by chromium in the sediments of the Monte Alegre stream and in the larvae of Odonata and the possible impact caused by them on the stream macroinvertebrates community. It was found that chromium contaminated the sediments and the aquatic biota. Although, the stream macroinvertebrates community structure did not appear to be modified.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stream macroinvertebrates; Contamination; Chromium.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000300023

A simple approach to integrate the ecotoxicological and chemical data for the establishment of environmental risk levels
Provedor de dados: 52
Autores: Cesar,Augusto; Abessa,Denis Moledo de Souza; Pereira,Camilo Dias Seabra; Santos,Aldo Ramos; Fernández,Nuria; Choueri,Rodrigo Brasil; DelValls,Tomas Angel.
In this work, multivariate and numeric methods were used to integrate the chemical and ecotoxicological data obtained for the sediments from the Santos Estuarine System, and for the vicinity of the discharges of the Submarine Sewage Outfall of Santos, in order to establish more accurately the environmental risks, identify the priority areas and thus provide guidance to control the programs and public policies. For both the datasets, the concentrations which exceeded numeric sediment guidelines tended to be associated to toxicity. For the estuary, this trend was corroborated by the correlations between the toxicity and Cu and PAHs levels, whereas for the sewage outfall region, this was observed through the correlation between the toxicity and Hg contents....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sediment; Contamination; Toxicity; Tiburonella viscana; Environmental risk assessment.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100028

Histological Alterations in Common Carp (Cyprinus carpio Linnaeus, 1758) Gills as Potential Biomarkers for Fungicide Contamination
Provedor de dados: 52
Autores: Stoyanova,Stela; Yancheva,Vesela Slavcheva; Velcheva,Iliana; Uchikova,Ekaterina; Georgieva,Elenka.
ABSTRACTThe present study aimed to investigate the histological alterations in common carp gills caused by a fosetyl-Al and fenamidone based fungicide tested in laboratory conditions at 30, 38 and 50 mg/L concentration. In general, all the tested concentrations activated compensatory-adaptive mechanisms, which caused pathological changes in the fish gills. Results showed different histological alterations in the gill structure, which included lamellar lifting, edema, proliferation of the glandular cells and epithelium, covering the gill filament, fusion and degenerative alterations. Blood circulatory system showed vasodilatation of the secondary lamellae and aneurysms. Overall, there was enhancement of the gill histological changes, which was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Fish; Gills; Pesticides; Contamination; Biomarkers.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000500757

Occurrence of plastic particles in procellariiforms, south of São Paulo state (Brazil)
Provedor de dados: 52
Autores: Barbieri,Edison.
Seabirds ingest plastic particles floating on the surface of the world's oceans. The birds can ingest plastic particles that they mistakenly identify as prey items. Alternatively, plastics can be taken up in the stomach contents of prey species. Plastic is often passed from parents to chicks in regurgitated food. In this study, individual petrels and albatrosses brought in by the tide onto Ilha Comprida beach between January 2000 and December 2002 were collected. Ilha Comprida, a barrier island in southern São Paulo, Brazil, was traversed by car along a transect of 70 kilometers. A total of 110 birds of 10 species were collected and 64.54% had plastic particles in their stomach. Frequencies of occurrence were Macronectes giganteus (64.28%), Thalassarche...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Contamination; Ilha Comprida; Plastic; Seabirds; Procellariiformes.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000200011

Antimicrobial action of the essential oil of Lippia gracilis Schauer
Provedor de dados: 52
Autores: Albuquerque,Cynthia Cavalcanti de; Camara,Terezinha Rangel; Mariano,Rosa de Lima Ramos; Willadino,Lilia; Marcelino Júnior,Cristiano; Ulisses,Cláudia.
Antimicrobial activity of the essential oil (EO) of Lippia gracilis Schauer over fungi and heliconia endophytic bacteria was evaluated. For the fungi Geotrichum candidum; Trichoderma viride; Torula herbarum; Paecillomyces sp.; Fusicoccum sp.; P. aeruginens; Curvularia lunata; Aspergillus nidulans; A. flavus; and A. niger mycelial discs were inoculated in PDA medium with oil (0; 420; 440; 460; 480 e 500 µL L-1). The inhibition percentage in 420 µL L-1 was 100% for all fungi, except for C. lunata and A. niger, which was 95.58% and 89.40% , respectively. In other experiment, a suspension of the Salmonella choleraceuis-diarizonae, Enterobacter asburiae, Bacillus thuringiensis, B. pumilus, B. cereus, Klebsiella pneumoniae, and E. hormaechei was individually...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Micropropagation; Contamination; Monoterpenes.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000500001

Retrospective evaluation of the clinical characteristics associated with Corynebacterium species bacteremia
Provedor de dados: 55
Autores: Yanai,Mitsuru; Ogasawasa,Maiko; Hayashi,Yuta; Suzuki,Kiyozumi; Takahashi,Hiromichi; Satomura,Atsushi.
ABSTRACT  Objectives: Corynebacterium spp. are becoming recognized as pathogens that potentially cause various infections. We aimed to evaluate the clinical characteristics associated with Corynebacterium spp. bacteremia.  Patients and methods: We retrospectively reviewed the medical records of all adult patients who had positive blood cultures for Corynebacterium spp. in a single university hospital between January 2014 and December 2016. Patients were divided into a bacteremia group and a contamination group based on microbiological test results and clinical characteristics. Patients’ characteristics, antimicrobial susceptibility of isolated species, antimicrobials administered, and patient outcomes were evaluated.  Results: Corynebacterium spp. were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corynebacterium species; Blood culture; Bloodstream infection; Contamination.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000100024

A case of urinary tract infection caused by Raoultella planticola after a urodynamic study
Provedor de dados: 55
Autores: Tuğcu,Murat; Ruhi,Caglar; Gokce,Ali M.; Kara,Melih; Aksaray,Sebahat.
Abstract Here we report the case of a patient who developed urinary tract infection after a urodynamic study. The causative agent was Raoultella planticola, a rare opportunistic pathogen that usually invades immunocompromised patients. While a urinary tract infection with R. planticola has been previously described, this is the first report in which an R. planticola infection developed after a urodynamic study. We postulate that the mechanism of infection was direct invasion of the urinary tract from contaminated urodynamic study equipment. Here, we discuss the role played by isotonic solutions in facilitating bacterial reproduction.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Urinary tract infection; Raoultella planticola; Urodynamic study; Contamination.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702017000200196

Bacterial contamination in milk kitchens in pediatric hospitals in Salvador, Brazil
Provedor de dados: 55
Autores: Cairo,Romilda Castro; Silva,Luciana Rodrigues; Andrade,Carol Ferreira de; Barberino,Maria Goreth de Andrade; Bandeira,Antônio Carlos; Santos,Kleber Pimentel; Diniz-Santos,Daniel R.
Milk may represent an important source of infectious agents to hospitalized pediatric patients. To describe the bacterial microflora isolated from the hands, stools, pharynx of all workers at milk kitchens in pediatric hospitals in the city of Salvador, Brazil, as well as in the formulas prepared by them, we carried out this cross-sectional study with all 91 workers from the 20 milk kitchens of all the public and private hospitals in Salvador, Brazil. Hand and pharynx swabs and stool samples were collected from all workers, as well as samples of the milk and formulas delivered by the kitchens. All samples were cultured for the detection of pathogenic and non-pathogenic bacteria. Pathogenic bacteria were isolated from 20 (22.0%) and 8 (8.8%) cultures of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacteria; Microflora; Hands; Faeces; Pharynx; Milk; Contamination; Hospital; Children.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702008000300011

Recommendations for hygiene of masks and circuits in mechanically home ventilated patients
Provedor de dados: 55
Autores: Toussaint,Michel; Reychler,Gregory.
Home mechanical ventilation requires equipment, consisting of a generator of pressure, a tubing and an interface to deliver air to the patient. Instructions for equipment maintenance are generally not based on scientific evidence. Studies however have reported that tubing and masks used at home are the most commonly found as very dirty and contaminated. Dirtiness and contamination of equipment potentially expose patients to a higher risk of airway colonization, which, in turn, should cause respiratory infections. For this reason, published hygiene instructions include the use of disinfectant solution. Nevertheless, they generally fail to explain how basic maintenance may be achieved by simple cleaning with soap and water. The instructions for post-cleaning...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contamination; Colonization; Disinfection; Home mechanical ventilation; Hygiene; Maintenance; Non-invasive ventilation.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702010000400013

Microbiological analyses of water from hemodialysis services in São Luís, Maranhão, Brazil
Provedor de dados: 58
Autores: Lima,José de Ribamar Oliveira; Marques,Sirley Garcia; Gonçalves,Azizedite Guedes; Salgado Filho,Natalino; Nunes,Paulo Cruz; Silva,Hernandes Sousa; Monteiro,Silvio Gomes; Costa,Jackson Mauricio Lopes.
Rigorous control of water quality in hemodialysis services is extremely important in order to guarantee a better quality of life of the patients submitted to this treatment. The lack of adequate water monitoring has caused the death of various patients in the past. The objective of the present study was to determine the physicochemical and bacteriological characteristics of water used by hemodialysis services in hospitals of the city of São Luís, Maranhão, Brazil. Bacteriological analyses included the membrane filter method for the determination of total coliform bacteria, the Cult-Dipcombi-TTC-agar method for heterotrophic bacteria and the limulus amebocyte lysate method for the determination of endotoxins. Eighteen water samples obtained from three...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water; Microbiology; Hemodialysis; Contamination.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000200001

Microbiological quality and safe handling of enteral diets in a hospital in Minas Gerais, Brazil
Provedor de dados: 58
Autores: Pinto,Raquel Oliveira Medrado; Correia,Eliznara Fernades; Pereira,Keyla Carvalho; Costa Sobrinho,Paulo de Souza; Silva,Daniele Ferreira da.
Contamination of enteral diets represents a high risk of compromising the patient's medical condition. To assess the microbiological quality and aseptic conditions in the preparation and administration of handmade and industrialized enteral diets offered in a hospital in the Valley of Jequitinhonha, MG, Brazil, we performed a microbiological analysis of 50 samples of diets and 27 samples of surfaces, utensils, and water used in the preparation of the diets. In addition, we assessed the good handling practices of enteral diets according to the requirements specified by the Brazilian legislation. Both kinds of enteral diets showed contamination by coliforms and Pseudomonas spp. No sample was positive for Staphylococcus aureus and Salmonella spp. On the other...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Enteral diet; Aseptic conditions; Contamination.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000200583

Characterization of antibiotic resistance in Salmonella enterica isolates determined from ready-to-eat (RTE) salad vegetables
Provedor de dados: 58
Autores: Taban,Birce Mercanoglu; Aytac,Sait Aykut; Akkoc,Nefise; Akcelik,Mustafa.
In the last decade, ready-to-eat (RTE) salad vegetables are gaining increasing importance in human diet. However, since they are consumed fresh, inadequate washing during processing can bring on some foodborne illnesses, like salmonellosis, since these food items have natural contamination from soil and water. During 2009-2010, a total of 81 samples were purchased arbitrarily from local markets in Ankara, and were examined for Salmonella contamination. Salmonella screening was performed by using anti-Salmonella magnetic beads system and polymerase chain reaction (PCR) identification of the suspected colonies. Then, the antibiotic resistance profiles of four Salmonella strains identified (strains RTE-1, RTE-2, RTE-3, and RTE-4) were also investigated, since...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contamination; Plasmid-mediated sulfonamide resistance; Ready-to-eat salad vegetables; Food safety; Salmonella.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000200007

Procalcitonin and C-reactive protein in differantiating to contamination from bacteremia
Provedor de dados: 58
Autores: Oksuz,Lutfiye; Somer,Ayper; Salman,Nuran; Erk,Osman; Gurler,Nezahat.
Procalcitonin (PCT) and C-reactive protein (CRP) are important biological markers used in the diagnosis of severe infections. The aim of this study was to evaluate the consistency of blood culture with PCT and CRP in differentiating contamination and non-bacteremia from true bacteremia. In this study blood samples were obtained from 809 febrile patients and analyzed using BACTEC 9120 system. All of positive blood cultures were performed Gram staining. The microorganisms were identified with conventional methods and automated systems. Antibiotic susceptibility tests were made by disc diffusion. PCT levels were analyzed by mini VIDAS device and PCT kit. PCT and CRP levels were analyzed with blood cultures in same times. Kruskal Wallis test, Mann-Whitney U...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Procalcitonin; C-reactive protein; Bacteremia; Blood cultures; Contamination.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400036

Nanobacteria-like particles: a threat to cell cultures
Provedor de dados: 58
Autores: Simonetti,Amauri Braga; Englert,Gelsa Edith; Campos,Karen; Mergener,Michelle; David,Cíntia de; Oliveira,Anna Paula de; Roehe,Paulo Michel.
The main goal of this study is to alert researchers who work with cell cultures for the risk of contamination by structures called nanobacteria (NB). NB are tiny structures with size varying from 80 to 500 nm, commonly occurring in clusters and producing a biofilm which contains carbonate or hydroxyl apatite. The most likely source of cell culture contamination by such organisms is serum used as supplement in culture media. The presence of NB leads to a progressive culture deterioration with accumulation of granules (probably phagocytized NB) in cytoplasmic vacuoles, an increasing number of dead cells in the supernatant and degeneration of cells that remained attached to the bottom of the vessel. NB can also be found in culture supernatants where they are...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nanobacteria; Cell culture; Fetal bovine serum (FBS); Contamination.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000100032

Contamination of environmental surfaces by methicillin-resistant Staphylococcus aureus (MRSA) in rooms of inpatients with MRSA-positive body sites
Provedor de dados: 58
Autores: Kurashige,E. Jessica Ohashi; Oie,Shigeharu; Furukawa,H.
ABSTRACT Methicillin-resistant Staphylococcus aureus (MRSA) can contaminate environmental surfaces that are frequently touched by the hands of patients with MRSA colonization/infection. There have been many studies in which the presence or absence of MRSA contamination was determined but no studies in which MRSA contamination levels were also evaluated in detail. We evaluated MRSA contamination of environmental surfaces (overbed tables, bed side rails, and curtains) in the rooms of inpatients from whom MRSA was isolated via clinical specimens. We examined the curtains within 7-14 days after they had been newly hung. The environmental surfaces were wiped using gauze (molded gauze for wiping of surface bacteria; 100% cotton, 4 cm × 8 cm) moistened with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Methicillin-resistant Staphylococcus aureus; Curtain; Overbed table; Bed side rail; Contamination.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000300703

Isolation of Mucorales from processed maize (Zea mays L.) and screening for protease activity
Provedor de dados: 58
Autores: Santiago,André Luiz Cabral Monteiro de Azevedo; Motta,Cristina Maria de Souza.
Mucoraleswere isolated from maize flour, corn meal and cooked cornflakes using surface and depth plate methods. Rhizopus oryzae, Circinella muscae, Mucor subtilissimus,Mucor hiemalis f. hiemalis, Syncephalastrum racemosum, Rhizopus microsporus var. chinensis and Absidia cylindrospora showed protease activity.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zygomycetes; Food; Contamination; Isolation.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000400019

Dietary intake and health effects of selected toxic elements
Provedor de dados: 61
Autores: Silva,André Luiz Oliveira da; Barrocas,Paulo R.G.; Jacob,Silvana do Couto; Moreira,Josino Costa.
Anthropogenic activities have being contributing to the spread of toxic chemicals into the environment, including several toxic metals and metalloids, increasing the levels of human exposure to many of them. Contaminated food is an important route of human exposure and may represent a serious threat to human health. This mini review covers the health effects caused by toxic metals, especially Cd, Hg, Pb and As, the most relevant toxic elements from a human health point of view.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioavailability; Contamination; Heavy metals; Metal toxicity.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000100007

Zinc Fertilization Effects on Seed Cadmium Accumulation in Oilseed and Grain Crops Grown on North Dakota Soils
Provedor de dados: 117
Autores: Rojas-Cifuentes,Gonzalo A; Johnson,Burton L; Berti,Marisol T; Norvell,Wendell A.
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Tipo: Journal article
Palavras-chave: Soil series; Seed; Uptake; Nutrients; Contamination.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100019

Controlled release formulations of herbicides based on micro-encapsulation
Provedor de dados: 118
Autores: Sopeña,Fátima; Maqueda,Celia; Morillo,Esmeralda.
Annual worldwide losses to weeds are estimated to comprise approximately 10-15% of attainable production among principal food sources. Worldwide consumption of herbicides represents 47.5% of the 2 million tons of pesticide consumed each year. However, the heavy use of herbicides has given rise to serious environmental and public health problems. It is therefore important to develop new herbicide formulations that are highly effective, that are safer (for the worker and for the environment), and that involve a low cost/production ratio. In this sense, Controlled release formulations of herbicides have become necessary in recent years, since they often increase herbicide efficacy at reduced doses. The present work reviews in detall the components of various...
Tipo: Journal article
Palavras-chave: Adjuvant; Contamination; Control; Delivery system; Formulations; Herbicide; Micro-encapsulation; Weed control.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100002

An overview of Listeria monocytogenes contamination in ready to eat meat, dairy and fishery foods
Provedor de dados: 65
Autores: Rodrigues,Carla Susana; Sá,Cláudia Valéria Gonçalves Cordeiro de; Melo,Cristiano Barros de.
ABSTRACT: Listeria monocytogenes is a relevant foodborne pathogen in public health, responsible for outbreaks of listeriosis often associated to the consumption of ready to eat meat, dairy and fishery products. Listeriosis is a serious disease that can lead to death and mainly affect children, the elderly and immunocompromised individuals. In pregnant women causes abortion or neonatal listeriosis. In Brazil, ready to eat food are appreciated and increasingly consumed by the population. Furthermore, products such as sausages, bologna, hams and cheeses have characteristics such as pH, Aw and sodium chloride content that favor the development of L. monocytogenes during their shelf life. The purpose of this paper was to present an overview of  L. monocytogenes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food safety; Ready to eat; Contamination; Listeriosis.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000200452

Leaching and residual activity of imidazolinone herbicides in lowland soils
Provedor de dados: 65
Autores: Refatti,João Paulo; Avila,Luis Antonio de; Noldin,José Alberto; Pacheco,Igor; Pestana,Rodrigo Ribeiro.
ABSTRACT: Herbicides used in the Clearfield® rice (Oryza sativa L.) production system have a potential for leaching. This can result in contamination of underground water resources and cause injury to not tolerant crops that are sown in a succession and/or crop rotation. The objective of this study was to determine the leaching potential and the residual activity of the herbicides used in the Clearfield® rice system. The experiment was conducted over a period of two years and consisted of conducting a field test to be followed by two bioassays with a year of difference between their implementation. Initially an experiment was conducted in lowland area where it was planted the cultivar of rice ‘PUITA INTA CL’. Approximately one and two years thereafter,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Imazethapyr; Imazapic; Imazapyr; Contamination; Groundwater.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500154

Genotypic profile of Listeria monocytogenes isolated in refrigerated chickens in southern Rio Grande do Sul, Brazil
Provedor de dados: 65
Autores: Mendonça,Karla Sequeira; Michael,Geovana Brenner; Nalério,Élen Silveira; Mendonça,Marcelo; Cardoso,Marisa Ribeiro Itapema; Silva,Wladimir Padilha da.
ABSTRACT: Listeria monocytogenes is of notable concern to the food industry, due to its ubiquitous nature and ability to grow in adverse conditions. This study aimed to determine the genotypic profile of L. monocytogenes strains isolated from refrigerated chickens marketed in the southern part of Rio Grande do Sul, Brazil. The strains of L. monocytogenes isolated were characterized by serotyping and Pulsed Field Gel Electrophoresis (PFGE). Three different serotypes (1/2a, 1/2b and 4e) were evaluated by PFGE, and the macrorestriction patterns utilizing enzymes AscI and ApaI, revealed five different pulsotypes. The presence of such varied genotypic profiles demonstrates the prevalence of L. monocytogenes contamination of chicken processing environments,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contamination; Pathogen; Prevalence; Serotyping.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000100132

In vitro establishment of blackberry (Rubus sp.) cultivar 'Xavante'
Provedor de dados: 65
Autores: Pelizza,Tânia Regina; Silveira,Fabiane Nunes; Ribeiro,Roberta Sabatino; Machado,Bruno Dalazen; Rufatto,Leo; Kretzschmar,Aike Anneliese.
ABSTRACT: The objective of this study was to evaluate the in vitro establishment of 'Xavante' blackberry under different conditions of plant luminosity and concentrations of salts of MS medium. The maintenance of 'Xavante' blackberry plants in the absence of light, with the use of MS medium with salt concentrations of 75% and 100% reduce bacterial contamination and the percentage of explants oxidized and provide the highest percentage of surviving and established explants. The 50% salt dilution in MS medium is not recommended when plants are subjected to the absence of light due to the high percentage of oxidized explants and consequently lower survival and establishment.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contamination; Luminosity; In vitro maintenance; Micropropagation; Oxidation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000901542

Strategies for exchange of coconut germplasm in Brazil
Provedor de dados: 65
Autores: Lédo,Ana da Silva; Oliveira,Leila Albuquerque Resende de; Machado,Caroline de Araújo; Silva,Ana Veruska Cruz da; Ramos,Semíramis Rabelo Ramalho.
ABSTRACT: Seed size and its physiology are a barrier for the exchange of coconut genetics resources and the tissue culture techniques can assist the germplasm bank enrichment. The aim of this study was to evaluate the effect of transport and storage procedures of zygotic embryos to promote the exchange of coconut accessions. Mature zygotic embryo from Cameroon red dwarf (CRD), Malayan yellow dwarf (MYD) and Malayan red dwarf (MRD) were used. The following treatments were evaluated: T1-storage of endosperm disc in plastic bags at 10±2°C for 5 days; T2 - 8 days; T3 - 12 days; T4 - embryo excised and inoculated in micro tube with Y3 culture medium with no sucrose for 2 days and T5 - five embryos inoculated in Y3 culture medium without sucrose in Petri dish...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cocos nucifera; Ex situ conservation; Genetic resources; Contamination.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000300408

Pb and Cd on growth, leaf ultrastructure and essential oil yield mint (Mentha arvensis L.)
Provedor de dados: 65
Autores: Jezler,Caroline Nery; Mangabeira,Pedro Antônio Oliveira; Almeida,Alex-Alan Furtado de; Jesus,Raildo Mota de; Oliveira,Rosilene Aparecida de; Silva,Delmira da Costa; Costa,Larissa Correa do Bomfim.
Contamination of medicinal plants with heavy metals as Pb and Cd can affect the growth and the essential oil production of the plants and represent a risk to those who consume as medicine. This study aimed to evaluate the effects of absorption and localization of Pb and Cd on growth, ultrastructural aspects of leaves and essential oil yield and composition of Mentha arvensis, applied on the soil with increasing concentrations (8, 16, 32, 64 and 128mg kg-1). There was a differential absorption of Pb and Cd by M. arvensis mainly concentrated in the roots. Pb was found in small amounts in the leaves while Cd largely exceeded the safety limit without symptoms of toxicity. The ultrastructural analysis revealed the metal accumulation on vesicles surrounding the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contamination; Heavy metals; Medicinal plant; Menthol.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000300392

Detection of transgenic events in maize using immunochromatographic strip test and conventional PCR
Provedor de dados: 64
Autores: Cantelmo,Narjara Fonseca; Von Pinho,Édila Vilela de Resende; Von Pinho,Renzo Garcia; Von Pinho,Iolanda Vilela; Nascimento,Micaela Sandim.
With the growth in the transgenic market, fast and economically viable methodologies are necessary for undertaking transgene detection tests, both for identification of contamination in seeds and in grain. Seeds from commercial conventional GNZ 2004, and transgenic VT-Pro (MON89034), Roundup Ready (NK603) and Herculex (TC1507) maize cultivars were used. In order to simulate different levels of contamination, the transgenic seeds were mixed with conventional seeds at levels of 0.2%, 0.4%, 1.0% and 1.6% for VT-Pro, and 0.2%, 0.5%, 0.8% and 1.2% for Roundup Ready and Herculex. The lateral flow membrane strip test was performed in the whole seed, endosperm and embryo. For evaluation of the specificity of the technique in detection of the TC1507 event by means...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fast testing; Contamination; Specificity; Transgenesis.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000500003

Lime and phosphate effects on atrazine sorption, leaching and runoff in soil
Provedor de dados: 64
Autores: Lima,José Maria de; Aquino,Regimeire Freitas; Magalhães,Ciro Augusto de Souza; Gonçalves,Raissa Homem; Nóbrega,Júlio Cesar Azevedo; Mello,Carlos Rogério.
ABSTRACT Atrazine still is a widely used herbicide in tropical soils to control annual broad-leaved weeds and annual grasses mainly in maize and sorghum plantations. Sorption and desorption in such soils are important processes that affect transport, ending with soil and water contamination, not only in these soils, but in other soils around the world. Lime and phosphate are important amendments in tropical soils to mitigate low fertility. These treatments can affect interaction among soil particles and between soil and atrazine. The objectives here were to evaluate the effect of lime, phosphate, and lime + phosphate treatments on sorption and transport of atrazine in a Typic Hapludult, using soil-erosion-plots at field conditions in a 3%-slope landscape...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contamination; Pesticide; Argisol; Soil erosion plots.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100204