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Cytotoxic and genotoxic potential of surface water from the Pitimbu river, northeastern/RN Brazil Genet. Mol. Biol.
Egito,Lucila Carmem Monte; Medeiros,Maria das Graças; Medeiros,Silvia Regina Batistuzzo de; Agnez-Lima,Lucymara Fassarella.
In this study, the onion (Allium cepa) root test was used to evaluate the genotoxicity of the Pitimbu River (Natal city, Brazil) surface water. The water was collected at five sampling sites along the river and one sample was obtained after the treatment (flocculation, chlorination and pH correction) of the river water for human consumption. All raw river water samples increased the frequency of chromosomal abnormalities and/or micronuclei and two of the water samples produced alterations in the mitotic index of the root cells. Two of the water samples also altered root growth and two produced morphological modifications in the A. cepa roots. Water collected from a site near an industrial area was the most consistently toxic and genotoxic of the samples....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allium cepa; Micronucleus; Cytotoxicity; Genotoxicity; Surface water.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000300023
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Modelo PestLCI: parametrização para os cenários brasileiros de produção agrícola. Infoteca-e
BARIZON, R. R. M.; MATSUURA, M. I. da S. F.; SCACHETTI, M. T.; SILVA, G. B. S. da; COSTA, M. P.; GAROFALO; LANES, V. F. de; PICOLI, G.; PIGHINELLI, A. L. M. T.; MORANDI, M. A. B..
Resumo: Diversas metodologias têm sido utilizadas para avaliar os impactos dos pesticidas utilizados na agricultura. O PestLCI Consensus v.1.0, ferramenta apresentada neste trabalho, traz contribuições para a estimativa de emissões de pesticidas em processos agrícolas, para a elaboração de inventários para estudos de avaliação do ciclo de vida (ACV), de gestão ambiental, que tem sido aprimorada para incorporar os potenciais impactos desses compostos em sistemas de produção agropecuários. Além da apresentação do PestLCI, este trabalho objetiva também parametrizar cenários de produção agrícola relevantes para o Brasil. Com isso, espera-se o aprimoramento dos estudos de ACV que abordem os possíveis impactos dos pesticidas sobre a saúde humana e meio ambiente.
Tipo: Documentos (INFOTECA-E) Palavras-chave: Avaliação do ciclo de vida; Agrotóxico; Pesticida; Impacto Ambiental; Águas Superficiais; Águas Subterrâneas; Solo; Ar; Pesticides; Environmental impact; Molecular dynamics; Groundwater; Surface water; Life cycle assessment; Air.
Ano: 2021 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1134598
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Barraginhas: realimentação de aquíferos. Infoteca-e
BARROS, L. C. de; RIBEIRO, P. E. de A..
As barraginhas são pequenas bacias escavadas no solo em formato de prato, meia-lua e de arco de flecha, com diâmetro médio de 16 m e profundidade média de 1,2 m. São construídas dispersas nas pastagens, lavouras (no final das curvas de nível) e nas margens de estradas, para captar água de enxurradas, controlando a erosão e conservando a água no subsolo. As barraginhas não devem ser construídas em cursos de água perenes, nas áreas de proteção permanente (APPs), no interior das voçorocas e das grotas e em terrenos com inclinação acima de 12%. Um sistema de Barraginhas construídas em uma microbacia promove a elevação do lençol freático e o umedecimento das baixadas, proporcionando segurança hídrica para lavouras, mesmo em regiões semiáridas. Com a água...
Tipo: Artigo de divulgação na mídia (INFOTECA-E) Palavras-chave: Barraginha; Captação de água de chuva; Barragem; Açude; Construção Rural; Manejo de Água; Manejo do Solo; Water harvesting; Water reservoirs; Surface water; Rain; Rainfed farming.
Ano: 2017 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1099353
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PestLCI Model: parameterization for scenarios of Brazilian agricultural production. Infoteca-e
BARIZON, R. R. M.; MATSUURA, M. I. da S. F.; SCACHETTI, M. T.; SILVA, G. B. S. da; COSTA, M. P.; GAROFALO; LANES, V. F. de; PICOLI, G.; PIGHINELLI, A. L. M. T.; MORANDI, M. A. B..
Abstract: Several methodologies have been proposed to assess the impact of pesticides applied to agricultural crops. The PestLCI Consensus v.1.0 tool presented herein helps estimating pesticide ewwmissions in agricultural processes to prepare inventories for life cycle assessment (LCA) studies. This important environmental management tool was improved to enable the incorporation of the potential impacts of these compounds on agricultural production systems. In addition, the present work also aimed to parameterize relevant agricultural production scenarios for Brazil. With this, it is expected to lead to the improvement of LCA studies that address the possible impacts of pesticides on human health and the environment.
Tipo: Documentos (INFOTECA-E) Palavras-chave: Avaliação do ciclo de vida; Agrotóxico; Pesticida; Impacto Ambiental; Águas Superficiais; Águas Subterrâneas; Solo; Ar; Pesticides; Environmental impact; Molecular dynamics; Groundwater; Surface water; Life cycle assessment; Air.
Ano: 2021 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1137347
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Influence of environmental and anthropogenic factors on the composition, concentration and spatial distribution of microplastics: A case study of the Bay of Brest (Brittany, France) ArchiMer
Frere, L.; Paul-pont, I.; Rinnert, Emmanuel; Petton, Sebastien; Jaffre, J; Bihannic, Isabelle; Soudant, P.; Lambert, C.; Huvet, Arnaud.
The concentration and spatial distribution of microplastics in the Bay of Brest (Brittany, France) was investigated in two surveys. Surface water and sediment were sampled at nine locations in areas characterized by contrasting anthropic pressures, riverine influences or water mixing. Microplastics were categorized by their polymer type and size class. Microplastic contamination in surface water and sediment was dominated by polyethylene fragments (PE, 53–67%) followed by polypropylene (PP, 16–30%) and polystyrene (PS, 16–17%) microparticles. The presence of buoyant microplastics (PE, PP and PS) in sediment suggests the existence of physical and/or biological processes leading to vertical transfer of lightweight microplastics in the bay. In sediment (upper...
Tipo: Text Palavras-chave: Microplastic; Coastal ecosystem; Surface water; Sediment; Raman spectroscopy; Hydrodynamic; Dispersal particle modelling.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00379/48994/51083.pdf
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Air-sea CO2 flux variability in frontal regions of the Southern Ocean from CARbon Interface OCean Atmosphere drifters ArchiMer
Boutin, Jacqueline; Merlivat, L.; Henocq, C.; Martin, Nicolas; Sallee, Jean-baptiste.
Nine CARbon Interface OCean Atmosphere (CARIOCA) drifters were deployed in the Southern Ocean (south of the subtropical front, STF) between 2001 and 2006. They recorded 65 months of measurements in all seasons between 57 degrees S and 40 degrees S. Hydrological fronts detected by altimetry indicate that one buoy explored the polar zone (PZ) of the Atlantic Ocean and the western Indian Ocean; the remaining buoys explored the northern and southern parts of the subantarctic zone (SAZ) from the mid-Indian Ocean (73 degrees E) to the eastern Pacific Ocean (112 degrees W). The air-sea CO2 fluxes along the buoy trajectories are primarily driven by the spatial variability of the fugacity of CO2 in seawater, fCO(2): in the SAZ, they vary between -1.1 and -4.2 mol...
Tipo: Text Palavras-chave: Antarctic circumpolar current; Northwestern mediterranean sea; Atlantic sector; Surface water; Gas exchange; Polar front; Temperature; Seawater; Transport.
Ano: 2008 URL: https://archimer.ifremer.fr/doc/00204/31483/29880.pdf
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Climatological distributions of pH, pCO(2), total CO2, alkalinity, and CaCO3 saturation in the global surface ocean, and temporal changes at selected locations ArchiMer
Takahashi, Taro; Sutherland, S. C.; Chipman, D. W.; Goddard, J. G.; Ho, Cheng; Newberger, Timothy; Sweeney, Colm; Munro, D. R..
Climatological mean monthly distributions of pH in the total H+ scale, total CO2 concentration (TCO2), and the degree of CaCO3 saturation for the global surface ocean waters (excluding coastal areas) are calculated using a data set for pCO(2), alkalinity and nutrient concentrations in surface waters (depths <50 m), which is built upon the GLODAP, CARINA and LDEO databases. The mutual consistency among these measured parameters is demonstrated using the inorganic carbon chemistry model with the dissociation constants for carbonic acid by Lueker et al. (2000) and for boric acid by Dickson (1990). Linear potential alkalinity-salinity relationships are established for 24 regions of the global ocean. The mean monthly distributions of pH and carbon chemistry...
Tipo: Text Palavras-chave: Global ocean; Surface water; PH; Carbonate chemistry; Climatology; Seasonal and decadal change.
Ano: 2014 URL: https://archimer.ifremer.fr/doc/00290/40098/38796.pdf
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Campylobacter armoricus sp. nov., a novel member of the Campylobacter lari group isolated from surface water and stools from humans with enteric infection ArchiMer
Boukerb, Amine M.; Penny, Christian; Serghine, Joelle; Walczak, Cécile; Cauchie, Henry-michel; Miller, William G.; Losch, Serge; Ragimbeau, Catherine; Mossong, Joël; Mégraud, Francis; Lehours, Philippe; Bénéjat, Lucie; Gourmelon, Michele.
During a study on the prevalence and diversity of members of the genus Campylobacter in a shellfish-harvesting area and its catchment in Brittany, France, six urease-positive isolates of members of the genus Campylobacter were recovered from surface water samples, as well as three isolates from stools of humans displaying enteric infection in the same period. These strains were initially identified as members of the Campylobacter lari group by MALDI-TOF mass spectrometry and placed into a distinct group in the genus Campylobacter, following atpA gene sequence analysis based on whole-genome sequencing data. This taxonomic position was confirmed by phylogenetic analysis of the 16S rRNA, rpoB and hsp60 (groEL) loci, and an analysis of the core genome that...
Tipo: Text Palavras-chave: Campylobacter; Novel species; Surface water; Coastal catchment; Human gastroenteritis; C. lari group; Whole genorne sequence.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00591/70346/69558.pdf
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Seasonal and inter-annual variability in properties of surface water off Santander, Bay of Biscay, 1991-1995 ArchiMer
Lavin, A; Valdes, L; Gil, J; Moral, M.
The annual cycle of temperature, salinity and nutrients of surface waters (up to 100 m depth) was studied from June 1991 to December 1995 in a cross-shelf section over the continental shelf waters off Santander (southern Bay of Biscay). The time series showed that the temperature followed the expected seasonal warming and cooling pattern, which determines a seasonal process of stratification and mixing of the water column. The stratification period occurs annually between May and October in a layer of about 50 m depth from the neritic station beyond to the shelf-break. In the period between November and April the water column remained mixed. During spring and summer low salinity values were found in the surface due to continental runoff and advection from...
Tipo: Text Palavras-chave: Golfe de Gascogne; Hydrologie; Eau superficielle; Série chronologique; Bay of Biscay; Hydrographical conditions; Surface water; Time series.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00326/43678/43194.pdf
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An in situ intercomparison exercise on passive samplers for monitoring metals, polycyclic aromatic hydrocarbons and pesticides in surface waters ArchiMer
Miege, C.; Mazzella, N.; Schiavone, S.; Dabrin, A.; Berho, C.; Ghestem, J. -p.; Gonzalez, C.; Gonzalez, Jean-louis; Lalere, B.; Lardy-fontan, S.; Lepot, B.; Munaron, Dominique; Tixier, Celine; Togola, A.; Coquery, M..
Tipo: Text Palavras-chave: Intercomparison exercise; Marine Strategy Framework Directive (MSFD); Metal; Passive sampling; Pesticide; Polar organic chemical integrative sampler (POCIS); Polycyclic aromatic hydrocarbon (PAH); Priority chemical; Surface water; Water Framework Directive (WFD).
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00077/18853/16597.pdf
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Urbanization and Waterborne Pathogen Emergence in Low-Income Countries: Where and How to Conduct Surveys? ArchiMer
Bastaraud, Alexandra; Cecchi, Philippe; Handschumacher, Pascal; Altmann, Mathias; Jambou, Ronan.
A major forthcoming sanitary issue concerns the apparition and spreading of drug-resistant microorganisms, potentially threatening millions of humans. In low-income countries, polluted urban runoff and open sewage channels are major sources of microbes. These microbes join natural microbial communities in aquatic ecosystems already impacted by various chemicals, including antibiotics. These composite microbial communities must adapt to survive in such hostile conditions, sometimes promoting the selection of antibiotic-resistant microbial strains by gene transfer. The low probability of exchanges between planktonic microorganisms within the water column may be significantly improved if their contact was facilitated by particular meeting places. This could...
Tipo: Text Palavras-chave: Waterborne diseases; Drug resistance; Urbanization; Surface water; Plastics; Metagenomic.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00601/71328/69758.pdf
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Presencia de hidrocarburos del petróleo disueltos y dispersos en el área de Monteverde, noviembre del 2006 OceanDocs
Rodríguez, A..
El presente estudio tiene la finalidad de determinar y evaluar en forma objetiva y sistemática, la influencia de la marea (Flujo y Reflujo), sobre la concentración de hidrocarburos disueltos y dispersos, que es un parámetro de índice de contaminación sobre la salud de un ecosistema marino costero.
Tipo: Journal Contribution Palavras-chave: Petroleum hydrocarbons; Hydrocarbon analysis; Oil pollution; Surface water; Surface water; Http://aims.fao.org/aos/agrovoc/c_25317.
Ano: 2007 URL: http://hdl.handle.net/1834/2376
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Seasonal variation in surface temperature and salinity around Lagos harbour, Nigeria OceanDocs
Oyewo, E.O.; Ajao, E.A.; Orekoya, T..
Continuous monitoring of Sea and Harbour (Lagoon) Surface temperature and salinity at two stations has been carried out from 1978 to 1981. This paper presents the findings for the period and relates it to the prevailing meteorological regimes. The pattern of sea surface temperature at Victoria beach in the study period shows a clearly defined mean maximum temperature of 29.34oC in April, and clearly defined mean minimum temperature of 25.63 in August. Depending on the year, there may be a less clearly defined mean maximum and minimum temperature in October/November and in January respectively. The pattern of surface temperature in the Harbour station is basically similar. The salinity cycle especially in the Harbour was found to be critically...
Tipo: Report Palavras-chave: Oceanography; Harbours; Water surface temperature; Water surface salinity; Oceanography; Salinity; Surface water.
Ano: 1982 URL: http://hdl.handle.net/1834/1270
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Estudio de corrientes marinas en la Bahía Chile (Bahía Discovery) OceanDocs
Medina, F..
Velocidades superficiales de las aguas fueron medidas en la Bahía chile en la Isla Greenwich, como parte de la Segunda Expedición Ecuatoriana a la Antártida, durante el verano del hemisferio sur, en 1990. Masas de hielo a la deriva desprendidas desde la costa fueron usadas como trazadores lagrangianos. Son comparadas corrientes superficiales y observaciones de vientos. La circulación superficial es determinada por los vientos cuando la velocidad de estos últimos exceden los 6 m/s. Los valores máximos y la dirección de la deriva superficial dependen exclusivamente del campo de viento prevaleciente. La velocidad de la corriente puede alcanzar valores de hasta 40 cm/s.
Tipo: Journal Contribution Palavras-chave: Surface water; Ice drift; Surface currents; Surface drifters; Polar waters; Surface circulation; Surface water.
Ano: 1990 URL: http://hdl.handle.net/1834/3727
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Características físico-químicas de las aguas del Paso Drake durante el verano 1988 OceanDocs
Allauca, S.; Valencia Trejo, M..
Un análisis de parámetros físicos y químicos se realizó en el Paso Drake en base a datos obtenidos durante el trayecto del BAE ORION hacia y desde la Península Antártica. La investigación efectuada en esta área forma parte de la Primera Expedición Ecuatoriana a la Antártica, realizada durante el verano 1988. Los datos de temperatura medidos con probetas de XBT, proporcionaron una clara visión de la estructura térmica de cada sección hasta los 500 metros. Se determinaron las posiciones de los diferentes Frentes y Zonas tanto por las condiciones subsuperficiales como por sus expresiones superficiales. La presencia de un anillo o masa de agua subsuperficial relativamente fría dentro de la Zona del Frente Polar permite pensar que corresponde a Agua Superficial...
Tipo: Journal Contribution Palavras-chave: Chemical oceanography; Surface water; Surface temperature; Air temperature; Salinity; Nutrients (mineral); Polar fronts; Chemical oceanography; Surface water; Air temperature; Salinity; Http://aims.fao.org/aos/agrovoc/c_1516; Http://aims.fao.org/aos/agrovoc/c_25317; Http://aims.fao.org/aos/agrovoc/c_230; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 1989 URL: http://hdl.handle.net/1834/3874
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Estudio hidroquímico en las aguas del Estrecho Bransfield, durante el verano austral 1998 OceanDocs
Burgos, L..
Durante los meses del verano austral (Nov. 1997-feb.1998) se realizó la VII Expedición Ecuatoriana a la Antártida a bordo del B/I ORION del Instituto Oceanográfico de la Armada. del 24 al 27 de enero/98, se realizaron 14 estaciones oceanográficas en el interior del Estrecho Bransfield donde además de varios parámetros físicos, meteorológicos y biológicos se estudiaron parámetros químicos como micronutrientes y oxígeno disuelto hasta una profundidad de 500 m. Se exponen los criterios y resultados obtenido de la distribución superficial y subsuperficial de los nutrientes y oxígeno disueltos. Se describen los diagramas T/S de las masas de aguas identificadas y su composición química. Las aguas superficiales del interior del Estrecho Bransfield se presentaron...
Tipo: Journal Contribution Palavras-chave: Chemical composition; Dissolved oxygen; Surface water; Ground water; Research vessels; Ground water; Chemical composition; Dissolved oxygen; Surface water.
Ano: 1998 URL: http://hdl.handle.net/1834/3849
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Nutrientes en las aguas superficiales y subsuperficiales en el área frente al Ecuador OceanDocs
Okuda, T.; Valencia, M.; Trejos de Suescum, R..
En este trabajo se analizaron las distribuciones de los nutrientes tales como fosfato y nitrato en dicha área, en base de los datos obtenidos en los cruceros oceanográficos realizados por el Instituto Oceanográfico de la Armada del Ecuador, en los años correspondientes entre 1975-1980. En general las concentraciones de fosfato y nitrato en la capa superior de la termoclina son muy bajas, luego aumentan con la profundidad. Las concentraciones de los nutrientes en las masas de agua en el área de estudio se encuentran considerablemente diferentes entre ellas, dependiendo del origen de su formación y el antecedente afectado por las actividades biológicas, tales como fotosíntesis y descomposición orgánica. Las aguas superficiales (Agua Tropicales Superficiales,...
Tipo: Journal Contribution Palavras-chave: Nutrients (mineral); Surface water; Surface water; Http://aims.fao.org/aos/agrovoc/c_25317.
Ano: 1983 URL: http://hdl.handle.net/1834/2095
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Distribution of chlorinated pesticides in surface water and fish of El Temsah and Bitter Lakes, Suez Canal OceanDocs
Said, T.O.; Hamed, M.A..
The potential effect of chlorinated pesticides pollutants carried by El Temsah and Bitter Lakes of the Suez Canal was investigated during four seasons of 2003. The results indicate the presence of total DDTs, total cyclodienes and total Hexachlorocyclohexane (HCHs) in surface water with ranges; 2.76-13.88 ng/l, 3.99-16.39 ng/l, and 0.39-1.25 ng/l, respectively. Total DDTs concentrations were ranged from 161-3100 ng/g (wet weight) with an average of 1087 ng/g (wet weight), while total HCHs concentrations were ranged from 30-1145 ng/g (wet weight) with an average of 316 ng/g (wet weight) recorded in three fish species; Lutjanus sp., R. haffara and S. rivulatus of the investigated area. Concentrations of chlorinated pesticides recorded in both of water and...
Tipo: Journal Contribution Palavras-chave: Pesticides; Surface water; El Temsah; Bitter lakes; Suez Canal Accumulation Fish meal Wastes Water masses Fish meal Wastes http://aims.fao.org/aos/agrovoc/c_2925 http://aims.fao.org/aos/agrovoc/c_8307.
Ano: 2005 URL: http://hdl.handle.net/1834/1060
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Qualité bactériologique des eaux de surface de la rivière Banco, Abidjan, Côte d'Ivoire. OceanDocs
Adingra, A.A.; Sako, A.; Kouassi, A.M..
Les eaux de surface de la rivière Banco contiennent de fortes densités de bactéries témoins de contamination fécale et de germes mésophiles. L'origine de cette pollution est beaucoup plus humaine; ce qui constitue un danger potentiel les principaux utilisateurs. Compte tenu des multiples utilisations de la rivière Banco, il est important pour les autorités locales d'entreprendre des campagnes de sensibilisation auprès de tous les utilisateurs.
Tipo: Journal Contribution Palavras-chave: Water quality; Surface water.
Ano: 2010 URL: http://hdl.handle.net/1834/5774
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Rapid generation advancement in chickpea Open Agri
Gaur, P.M..
Palavras-chave: Purification; Chickpeas; Genotypes; Photoperiodicity; Cropping systems; Latitude; Segregation; Altitude; Reproductive stage; Surface water.
Ano: 2007 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3292
Registros recuperados: 40
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