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Registros recuperados: 27
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Biocontrol capacity of wild and mutant Trichoderma harzianum (Rifai) strains on Rhizoctonia solani 618: effect of temperature and soil type during storage Electron. J. Biotechnol.
Montealegre,Jaime; Valderrama,Luis; Herrera,Rodrigo; Besoaín,Ximena; Pérez,Luz M.
Wild (Th11, Th12 and Th650) and mutant (Th11A80.1, Th12A40.1, Th12C40.1 and Th650-NG7) Trichoderma harzianum strains were stored for 180 days at 5ºC or at 22ºC, in two types of soils. Strains recovered at 90, 120 and 180 days from the two types of soils, retained their full capacity to biocontrol Rhizoctonia solani 618, that produces crown and root rot of tomatoes. Recovery, estimated as colony forming units (cfu) of the wild and mutant strains, showed that all increased their cfu after storage independently of the type of soil and temperature, although kinetic behavior differed among strains. Ratios of recovery after storage in type B soil/ type A soil or at 22ºC/5ºC, higher or lower than one respectively, allowed to establish that Th11 and Th12 were the...
Tipo: Journal article Palavras-chave: Bioantagonism; Persistence; Root rot; Tomato.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582009000400002
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Calidad sanitaria de jugos de nopal, persistencia de Salmonella typhimurium y respuesta de defensa de nopal verdura. Colegio de Postgraduados
Landa Salgado, Patricia.
Durante las últimas dos décadas las infecciones por Salmonella se han registrado entre las enfermedades más frecuentes, afectando a personas de todas las edades y condiciones sociales y causando numerosas hospitalizaciones y muerte de personas por el consumo de frutas y hortalizas frescas. En frutas, en 2011 el Centro para el Control de Enfermedades y Prevención en EUA reportó un brote de infección por S. Agona asociado con el consumo de papaya fresca en el que 106 personas resultaron afectadas. Mientras que en hortalizas, S. typhimurium se ha aislado de diversas especies entre las que se encuentra el nopal verdura (Opuntia ficus-indica L. Mill) (Quiroz-Santiago, 2009; Hernández et. al. 2009). Debido a que el nopal se consume en fresco para el control de...
Palavras-chave: Salmonella; Nopal; Persistencia; Respuesta de defensa nopal; Persistence; Defense of nopal; Doctorado; Fitopatología.
Ano: 2012 URL: http://hdl.handle.net/10521/745
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Comportamento da atrazina em solos brasileiros em condicoes de laboratorio. Repositório Alice
NAKAGAWA, L.E.; LUCHINI, L.C.; MUSUMECI; M.R.; ANDREA, M.M. de.
A persistencia, a mobilidade e as constantes de adsorcao da atrazina foram estudadas em condicoes de laboratorio, em dois tipos de solos (Gley Humico e Latossolo Vermlho-Escuro) durante 180 dias apos a aplicacao da C-atrazina as amostras de solos, incubadas a temperatura de 25C, no escuro. A meia-vida da atrazina foi de 56 dias no solo Gley Humico e 54 dias no solo Latossolo Vermelho-Escuro. O principal produto da degradacao detectado nos dois solos foi a hidroxiatrazina, e, em maior concentracao, no solo Gely Humico. Outros dois metabolitos de atrazina, a deetilatrazina e a deisopropilatrazina, foram tambem detectados, porem, em menor concentracaao nos dois solos. A atrazina apresentou uma constante da adsorcao semelhante nos dois solos: K=2,6 no Gley...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Adsorcao; Mobilidade; Hidroxiatrazina; Persistencia; Herbicida; Adsorption; Mobility; Hydroxyatrazine; Persistence; Herbicide.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/handle/doc/104205
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Continuity and Change in Social-ecological Systems: the Role of Institutional Resilience Ecology and Society
Pahl-Wostl, Claudia; Institute for Environmental Systems Research, University of Osnabrueck; pahl@usf.uni-osnabrueck.de.
In recent years recurring political, economic, and environmental crises require questioning and re-evaluating dominant pathways of human development. However, political and economic frameworks seem to encompass deeply rooted resistance to fundamental changes (e.g., global financial crisis, climate change negotiations). In an effort to repair the system as fast as possible, those paradigms, mechanisms, and structures that led into the crisis are perpetuated. Instead of preserving conventional patterns and focusing on continuity, crises could be used as an opportunity for learning, adapting, and entering onto more sustainable pathways. However, there are different ways not only of arguing for sustainable pathways of development but also of conceptualizing...
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptation; Institutions; Persistence; Resilience; Transformation; Water governance.
Ano: 2012
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Degradação do herbicida sulfentrazone em dois solos de Mato Grosso do Sul. Repositório Alice
BRUM, C. de S.; FRANCO, A. A.; SCORZA JUNIOR, R. P..
2013
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Persistência; Cana-de-açúcar; Agrotóxicos; Persistence; Sugarcane; Pesticide.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/970804
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Devenir des virus entériques humains en milieu marin : Apport des VLPs (Virus Like Particles) pour la purification des coquillages ArchiMer
Loisy, Fabienne.
This work was developed following two research axes: the improvement of norovirus (human and animal strain) and rotavirus detection, and the evaluation of VLPs as a viral substitute for studying their comportment in marine environment. The main point concerning the method optimisation was the development of real-time RT-PCR for norovirus detection. The second part of the work has demonstrated the potential of norovirus and rotavirus VLPs as a viral surrogate as proven by the study of their stability in seawater. As VLPs are non-pathogen particles, the long persistence of rotavirus VLPs in shellfish has been shown in natural conditions (oysters on marine estuaries). The studies of Norwalk virus VLPs attachment to oyster tissues have demonstrated a specific...
Tipo: Text Palavras-chave: Specific binding; Persistence; Shellfish; Real time RT PCR; VLPs; Rotavirus; Norovirus; Fixation spécifique; Persistance; Coquillage; RT PCR en temps réel; VLPs; Rotavirus.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/these-327.pdf
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Diagnostic moléculaire de l'origine des contaminations fécales dans l'environnement littoral - Développement de marqueurs Bacteroidales spécifiques de l'hôte ArchiMer
Mieszkin, Sophie.
Human and animal faecal pollution affects environmental water in inland and coastal areas, with negative implications for recreational uses, public safety and shellfish sanitary status due to the presence of enteric pathogens. Starting from 2011, the revised Bathing Water European Directive (2006/7/CE) requires the establishment of bathing water profiles with an inventory and study of the pollution sources likely to affect water quality. The faecal microbiological indicators used in these regulations, Escherichia coli and enteroccoci, cannot distinguish between human and animal faecal contamination. Thus, alternative methods, that focus on target microorganisms such as bacteria belonging to the Bacteroidales order were developed or are being developed to...
Tipo: Text Palavras-chave: Contaminations fécales humaines; Porcines et ruminants; Bacteroidales; Gènes codant les ARNr 16S; PCR quantitative en temps réel; Eaux; Persistance; Huîtres; Human; Porcine and ruminant faecal contaminations; Bacteroidales; 16S rRNA genes; Quantitative real-time PCR; Water; Persistence; Oyster.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00021/13206/10258.pdf
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Effect of oxygen and temperature on the dynamic of the dominant bacterial populations of pig manure and on the persistence of pig-associated genetic markers, assessed in river water microcosms ArchiMer
Marti, R.; Mieszkin, Sophie; Solecki, O.; Pourcher, A. -m.; Hervio-heath, Dominique; Gourmelon, Michele.
Aims: The aim is to evaluate the dynamic of Bacteroides-Prevotella and Bacillus-Streptococcus-Lactobacillus populations originating from pig manure and the persistence of pig-associated markers belonging to these groups according to temperature and oxygen. Methods and Results: River water was inoculated with pig manure and incubated under microaerophilic and aerobic conditions, at 4 and 20 degrees C over 43 days. The diversity of bacterial populations was analysed by capillary electrophoresis-single-strand conformation polymorphism. The persistence of the pig-associated markers was measured by real-time PCR and compared with the survival of Escherichia coli and enterococci. Decay was characterized by the estimation of the time needed to produce a 1-log...
Tipo: Text Palavras-chave: Lactobacillus amylovorus; Microbial source tracking; Oxygen; Persistence; Pig-associated Bacteroidales markers; Quantitative real-time PCR; River water; Temperature.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00053/16470/14534.pdf
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El cambio en las actividades agrícolas del pueblo de San Miguel Tocuila, Texcoco, Estado de México. Colegio de Postgraduados
Hernández Rodríguez, Cuitláhuac Víctor.
Debido a la persistencia de las actividades agrícolas en el cambio urbano de la población de San Miguel Tocuila, se planteó conocer el papel fundamental que desempeña el autoabasto en la satisfacción de las necesidades básicas de la familia campesina, para entender su dinámica y estrategias de adaptación. Para obtener los datos necesarios se examinaron como base empírica 30 unidades de análisis de este pueblo que pertenece al municipio de Texcoco (Estado de México), con la intención de ubicar sus componentes y características, mismas que explicaron el modelo hipotético con criterios de selección. De igual manera se aplicaron diversos instrumentos de investigación tales como la guía de observación, encuesta, genealogía y el guión de la entrevista, las...
Palavras-chave: Autoabasto; Familia; Energía; Persistencia; Self supply; Family; Energy; Persistence.
Ano: 2011 URL: http://hdl.handle.net/10521/358
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Factors Involved in the Persistence of a Shiga Toxin-Producing Escherichia coil O157:H7 Strain in Bovine Feces and Gastro-Intestinal Content ArchiMer
Segura, Audrey; Auffret, Pauline; Bibbal, Delphine; Bertoni, Marine; Durand, Alexandra; Jubelin, Gregory; Kerouredan, Monique; Brugere, Hubert; Bertin, Yolande; Forano, Evelyne.
Healthy cattle are the primary reservoir for O157:H7 Shiga toxin-producing E coil responsible for human food-borne infections. Because farm environment acts as a source of cattle contamination, it is important to better understand the factors controlling the persistence of E. coil O157:H7 outside the bovine gut. The E. coil O157:H7 strain MC2, identified as a persistent strain in French farms, possessed the characteristics required to cause human infections and genetic markers associated with clinical O157:H7 isolates. Therefore, the capacity of E. coil MC2 to survive during its transit through the bovine gastro-intestinal tract (GIT) and to respond to stresses potentially encountered in extra intestinal environments was analyzed. E. coil MC2 survived in...
Tipo: Text Palavras-chave: Escherichia coli; STEC; EHEC; O157:H7; Biofilms; Stress response; Persistence.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00434/54588/55972.pdf
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Infectivity and RNA Persistence of a Norovirus Surrogate, the Tulane Virus, in Oysters ArchiMer
Polo, David; Schaeffer, Julien; Teunis, Peter; Buchet, Vincent; Le Guyader, Soizick.
Oysters, being filter feeders, can accumulate some human pathogens such as norovirus, a highly infectious calicivirus, most common cause of acute gastroenteritis worldwide. Accumulated virus decays over a period of days to weeks, possibly rendering contaminated oysters safe again. Sensitive molecular methods have been set up for shellfish analysis but without answering the question of infectious virus detection. Using the Tulane virus (TV), a norovirus surrogate that recognizes the same ligand as human norovirus in oyster tissues, the genome and infectious virus decay rates were estimated using inverse linear regression in a Bayesian framework for genome copies. Infectivity decreased faster than genome copies but infectious viruses were detected for...
Tipo: Text Palavras-chave: Infectious virus; Genome detection; Oysters; Persistence; Shellfish outbreaks.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00436/54736/56182.pdf
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Introducao e avaliacao de forrageiras em "cordilheira" e "campo-cerrado" na parte leste da sub-região dos Paiaguas, Pantanal Mato-grossense. Repositório Alice
COMASTRI, FILHO, J. A.; POTT, A..
Na parte leste da sub-reiao dos Paiaguas, entre 1980 e 1985, foram introduzidas em area de "cordilheira" desmatada 30 gramineas e 48 leguminosas, e, em area de "campo-cerrado", 21 gramineas e 21 leguminosas, com o objetivo de selecionar forrageiras adaptadas as suas condicoes ecologicas. Os germoplasmas foram cultivados em parcelas de 1,5 x 3,0 m. Para cada especie foram utlizadas duas parcelas: com e sem adubo (CA e SA, respectivamente). O rendimento de materia seca da parcela CA foi superior ao da SA apenas no primeiro ano. O indice de avaliacao (IA) no dominio de 0 a 3 mostrou que as forrageiras mais promissoras nas area de "cordilheira" foram Brachiaria decumbens, com IA de 2,65 e 2,60, e B. humidicola, com IA de 2,67 e2,60, nas parcelas CA e SA,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Gramineas; Leguminosas; Nodulacao; Persistencia; Producao; Resistencia a pragas; Resistencia a doencas; Tolerancia a seca; Tolerancia a alagamento; Grasses; Legumes; Nodulation; Persistence; Yield; Drought tolerance; Flood tolerance; Pest resistance; Disease resistance.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/handle/doc/104271
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Les Escherichia Coli potentiellement pathogenes dans l’environnement littoral : cas des STEC et des EPEC ArchiMer
Baliere, Charlotte.
The contamination of coastal areas by potentially pathogenic enteric bacteria is of concern for the sustainability of some uses, such as shellfish farming, recreational shellfish harvesting and bathing. The contamination of these environments may occur through the land-spreading of livestock wastes, animal feces deposited on pastures, wastewaters from slaughterhouses or from municipal wastewater treatment plants. The presence of these bacteria in coastal environment may present a potential risk to human health. In fact, shellfish-borne outbreaks or human infections may occur by the consumption of shellfish from contaminated areas or the ingestion of water during bathing in contaminated waters, respectively. To date, few studies focusing on the presence and...
Tipo: Text Palavras-chave: STEC; EPEC; Coquillages; Diversité; Virulence; Persistance; STEC; EPEC; Shellfish; Diversity; Virulence; Persistence.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00312/42322/41653.pdf
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Lixiviação e degradação de diuron em dois solos de textura contrastante - DOI: 10.4025/actasciagron.v30i5.5963 Agronomy
Inoue, Miriam Hiroko; UNEMAT; Oliveira Júnior, Rubem Silverio de; UEM; Constantin, Jamil; UEM; Alonso, Diego Gonçalves; UEM; Santana, Diogo Carneiro de; UNEMAT.
Objetivou-se estudar a lixiviação do diuron em colunas de solo, além do efeito de métodos de redução da atividade microbiana na degradação deste herbicida em amostras de LATOSSOLO VERMELHO Distrófico (LVd – textura franco-arenosa) e LATOSSOLO VERMELHO Distroférrico (LRd – textura argilosa). Para avaliar a movimentação do diuron (0; 1,6 e 3,2 kg há-1), foram aplicadas lâminas de 0, 20, 40, 60 e 80 mm de água. Na degradação, os métodos de restrição empregados foram: autoclavagem prévia, aplicação de brometo de metila, amoxicilina, captan e amoxicilina+captan, sendo que as amostras foram mantidas na ausência ou presença de luz. Resultados indicam que lâminas superiores a 60 mm foram suficientes para promover movimentação nítida nas amostras de LVd. Para o...
Palavras-chave: 5.01.02.00-1 Fitossanidade efeito residual; Mobilidade; Persistência; Retenção residual effect; Mobility; Persistence; Retention..
Ano: 2008 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5963
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Monitoring viral contamination in shellfish growing areas ArchiMer
Le Guyader, Soizick; Pommepuy, Monique; Atmar, Robert.
Human and animal fecal wastes and urine contain a large number of different viruses that can enter the environment through the discharge of waste materials from infected individuals. Despite the high diversity of viruses that are introduced into the environment by human fecal pollution, only a few have been recognized to cause disease in association with consumption of contaminated shellfish. Viruses are present in shellfish in very low numbers. Nevertheless, they are present in sufficient quantities to pose a health risk as presented. This low level of contamination has made it necessary to develop highly sensitive viral extraction methods to ensure virus recovery from shellfish tissues. The most common route for accidental contamination is after heavy...
Tipo: Text Palavras-chave: Human enteric viruses; Shellfish; Sewage; Persistence; Flux.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00015/12606/15279.pdf
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Nemátodos entomopatógenos en el control de la mosca negra (Dípetera: Sciaridae) en nochebuena (Euphorbia pulcherrima Willd. ex. Klotzch). Colegio de Postgraduados
Villanueva Sánchez, Evert.
Las “moscas negras” (Diptera: Sciaridae), son plagas primarias en el cultivo de nochebuena en las zonas productoras del centro de México. A pesar de su importancia, no existen antecedentes sobre su identidad taxonómica, su desarrollo y sus alternativas de control diferentes a las químicas. En el presente trabajo se planteó identificar la(s) especie(s) de mosca negra asociada(s) al cultivo, caracterizar los estados biológicos de la especie más abundante, así como evaluar el potencial de control de los nematodos entomopatógenos Heterorhabditis bacteriophora y Steinernema feltiae a travez del estudio de su persistencia en substrato, su patógenicidad y virulencia. Para identificar las especies, se realizaron recolectas de adultos de la mosca negra en...
Palavras-chave: Bradysia difformis; Heterorhabditis bacteriophora; Steinernema feltiae; Persistencia; Patogenicidad; Virulencia; Persistence; Pathogenicity; Virulence; Entomología y Acarología; Doctorado.
Ano: 2013 URL: http://hdl.handle.net/10521/1899
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Non-Linearities and Fractional Integration in the US Unemployment Rate AgEcon
Caporale, Guglielmo Maria; Gil-Alana, Luis A..
This paper proposes a model of the US unemployment rate which accounts for both its asymmetry and its long memory. Our approach, based on the tests of Robinson (1994), introduces fractional integration and nonlinearities simultaneously into the same framework (unlike earlier studies employing a sequential procedure), using a Lagrange Multiplier procedure with a standard limit distribution. The empirical results suggest that the US unemployment rate can be specified in terms of a fractionally integrated process, which interacts with some non-linear functions of the labour demand variables (real oil prices and real interest rates). We also find evidence of a long-memory component. Our results are consistent with a hysteresis model with path dependency rather...
Tipo: Working or Discussion Paper Palavras-chave: Unemployment; Asymmetries; Nonlinearities; Fractional Integration; Persistence; Long Memory; Labor and Human Capital; C32; E32.
Ano: 2004 URL: http://purl.umn.edu/26232
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Occurrence of a single type strain (G3, P[12]) of equine rotavirus in foals on a racehorse farm from 1986 to 1993 OAK
Sakawaki, Hiromi; Ishizaki, Hiroshi; Takagi, Michihiro; Masuda, Gen; Taniguchi, Koki; Urasawa, Tomoko; Urasawa, Shozou; Goto, Hitoshi; Shirahata, Toshikazu; 阪脇, 廣美; 石崎, 宏; 高木, 道浩; 増田, 玄; 谷口, 孝喜; 浦沢, 价子; 浦沢, 正三; 後藤, 仁; 白幡, 敏一.
Palavras-chave: Foals; Persistence; Rotavirus.
Ano: 1997 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1325
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Persistence of picloran in Brazilian soil. Repositório Alice
CERDEIRA, A. L.; FORSTER, R..
The persistence of the herbicide picloran (4-amino - 3,5,6 - trichloropicolinic acid) was studied in "Latossolo vermelho" soil (36% clay, 2% organic matter) in Jaguariuna county, Sao Paulo, Brazil. The herbicide was sprayed on plowed soil in March, 1989, at rates of 0.0; 0.56 and 1.12 g/ha. Picloran persistence was evaluated using bioassay with bean (Phaseolus vulagris L.). The data showed that the herbicide was very persistent up to 180 days, just at the raining season, October to December. At the same interval, from 180 to 240 days, typical visual symptoms disappeared, although there were still effects on height of plants, length of leaves and dry weight. No effect of the herbicide was detected after 300 days.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Herbicide; Picloram; Persistence; Soil; Beans; Weeds; Chemical control.
Ano: 1992 URL: http://www.alice.cnptia.embrapa.br/handle/doc/11007
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Persistent establishment of a tropical disease in Europe: the preadaptation of schistosomes to overwinter ArchiMer
Mulero, Stephen; Rey, Olivier; Arancibia, Nathalie; Mas-coma, Santiago; Boissier, Jerome.
BackgroundGlobal changes promote the spread of infectious diseases worldwide. In this context, tropical urogenital schistosomiasis is now permanently established in Corsica since its first emergence in 2013. The local persistence of the tropical pathogens (schistosomes) responsible for urogenital schistosomiasis at such latitudes might be explained by (i) the presence of its intermediate host, the snail Bulinus truncatus, (ii) the recurrent local reseeding of schistosomes by their vertebrate hosts (either human or animal) every summer, and/or (iii) the maintenance and survival of schistosomes within their snail hosts over winter.MethodsIn this study we conducted an ecological experiment to assess the ability of temperate and tropical schistosome strains to...
Tipo: Text Palavras-chave: Schistosomiasis; Bulinus truncatus; Corsica; Persistence; Schistosoma haematobium; Temperature.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00509/62088/66275.pdf
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