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| Registros recuperados: 35 | |
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| White, D. |
| Microbes in nature are often concentrated on surfaces where they exist in microcolonies of mixed composition. The assay of these mixed microbial consortia by utilizing biochemical components eliminates the problems associated with cultural selectivity of viable counts or the requirement for quantitative release from surfaces required in some microscopic techniques. The assay of cellular components restricted to subsets of the microbial community gives insights into the community structure of the biofilm whereas assay of cellular components common to all cells can be used for biomass estimations. Formation of endogenous storage materials can be utilized as measures of nutritional status and rates of formation or turnover of specific "signatures" from... |
| Tipo: Text |
Palavras-chave: Bacteria; Fouling; Bioassays; Metabolism; Surfaces; Bacteria collecting devices; Culture media; Microbiological analysis. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-963.pdf |
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| Burgeot, Thierry; Akcha, Farida; Menard, Dominique; Robinson, Craig; Loizeau, Veronique; Brach-papa, Christophe; Martinez-gomez, Concepcion; Le Goff, Jeremie; Budzinski, Helene; Le Menach, Karine; Cachot, Jerome; Minier, Christophe; Broeg, Katja; Hylland, Ketil. |
| The International workshop on Integrated Assessment of CONtaminants impacts on the North sea (ICON) provided a framework to validate the application of chemical and biological interpretation thresholds (BACs and EACs) in the Seine Bay in France. Bioassays (oyster larval anomalies, Corophium arenarium toxicity assay and DR Calux) for sediment and biomarkers: ethoxyresorufin-O-deethylase (EROD) activity, acetylcholinesterase (AChE) activity, lysosomal membrane stability (LMS), DNA strand breaks using the comet assay, DNA adducts, micronucleus (MN), PAH metabolites, intersex and fish external pathologies were analyzed in four marine sentinel species (Platichthys flesus, Limanda limanda, Mytilus sp. and Nucella lapilus). Polycyclic aromatic hydrocarbons... |
| Tipo: Text |
Palavras-chave: Biomarkers; Bioassays; Chemical contamination; Integrated monitoring in chemistry and biology; Local study; Large geographical scale. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00357/46789/46655.pdf |
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| Hess, Philipp. |
| An overview is given of the biological origin of phycotoxins, as well as their chemical characteristics. Major poisoning types are described and examples of poisoning events are given to illustrate the importance of the phenomenon to both shellfish consumers and the shellfish producing industry. The characteristics of phycotoxins as natural products, the lack of predictability of their occurrence, economic drivers and the freshness of shellfish consumed in many countries result in a number of requirements for methods to be used in the efficient detection of these compounds. Subsequently, the performance of mouse bioassays and mass spectrometry as detection tools are compared for examples from Irish and French monitoring programmes to assess the usefulness... |
| Tipo: Text |
Palavras-chave: Bioanalytical methods; Bioassays; Mass spectrometry; Liquid chromatography; Biological samples. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00006/11767/8989.pdf |
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| Boher, S; Piclet, Guy; Beril-stien, S; Masson, Daniel; Delonce, R; Biziagos, E; Schwartzbrod, L. |
| Shellfish consumption is clearly associated with the transmission of enteric viruses. The channel of transmission of enteric viruses to human beings could be decreased particularly if the systems of depuration of shellfish were optimized, standardized and if their viral efficiency was controlled. The purpose of this work was to study the contamination of oysters and to assess the efficiency of several depuration processes. Our study have demonstrated that in some cases, 50% of oysters samples contain enteric viruses or H.A.V. antigen and the quantities of viruses range from 17 to 246 FF for the rotaviruses and from 124 to 200 for the enteroviruses per 100 g of tissue. According to our results, the exclusive use of a bacteriological criterium to determine... |
| Tipo: Text |
Palavras-chave: Rotavirus; Hepatitis A virus; Enterovirus; Crassostrea gigas; Bivalvia; Seafood; Bioassays; Cell culture; Viruses; Self purification; Viral diseases; Shellfish. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1615.pdf |
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| Trommer, Gabriele; Leynaert, Aude; Klein, Cecile; Naegelen, Aurore; Beker, Beatriz. |
| Phytoplankton nutrient limitation patterns were investigated in an anthropogenically influenced coastal ecosystem with a high nutrient load. Weekly nutrient limitation bioassays, and water chemistry and stoichiometry measurements were performed in the Bay of Brest, France, from February to July 2011. Each limitation bioassay included phosphorus, nitrogen, silicate and all possible combined nutrient additions, and lasted over 72 h. Results showed that the phytoplankton community experienced a general P limitation from March to July. N limitation alone was observed only during 1 week in early March. Subsequently, all limitation bioassays revealed primary P limitation, indicated by significantly increased growth rates in all samples containing P additions.... |
| Tipo: Text |
Palavras-chave: Phytoplankton; Stoichiometry; Bioassays; Nutrient limitation; Coastal ecosystem. |
| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00368/47947/48023.pdf |
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| Mamindy-pajany, Yannick; Hamer, Bojan; Romeo, Michele; Geret, Florence; Galgani, Francois; Durmisi, Emina; Hurel, Charlotte; Marmier, Nicolas. |
| This work investigates the ecotoxicological evaluation of contaminated dredged sediments from French Mediterranean navy harbour (A), commercial port (B) and two composite specimens (C) and (D) coming from the mixture of A and B with other port sediments. The toxicity of elutriates from these sediments is estimated using embryo-toxicity test. Microtox (R) solid phase test, LuminoTox, phytotoxicity tests and genotoxicity test. Bioassay responses are not clearly correlated with chemical contamination in the whole sediment and vary as a function of tested organisms. The highest contaminated samples (A and C) are almost always more toxic than the less contaminated samples (B and D). Among composite sediments, the mixture effect with other sediments is not... |
| Tipo: Text |
Palavras-chave: Bioassays; Dredged port sediments; Phytotoxicity; Microtox (R) solid phase; Embryo-toxicity test; Genotoxicity. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00031/14262/12284.pdf |
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| Carvalho, Raquel N.; Arukwe, Augustine; Ait-aissa, Selim; Bado-nilles, Anne; Balzamo, Stefania; Baun, Anders; Belkin, Shimshon; Blaha, Ludek; Brion, Francois; Conti, Daniela; Creusot, Nicolas; Essig, Yona; Ferrero, Valentina E. V.; Flander-putrle, Vesna; Furhacker, Maria; Grillari-voglauer, Regina; Hogstrand, Christer; Jonas, Adam; Kharlyngdoh, Joubert B.; Loos, Robert; Lundebye, Anne-katrine; Modig, Carina; Olsson, Per-erik; Pillai, Smitha; Polak, Natasa; Potalivo, Monica; Sanchez, Wilfried; Schifferli, Andrea; Schirmer, Kristin; Sforzini, Susanna; Sturzenbaum, Stephen R.; Softeland, Liv; Turk, Valentina; Viarengo, Aldo; Werner, Inge; Yagur-kroll, Sharon; Zounkova, Radka; Lettieri, Teresa. |
| The risk posed by complex chemical mixtures in the environment to wildlife and humans is increasingly debated, but has been rarely tested under environmentally relevant scenarios. To address this issue, two mixtures of 14 or 19 substances of concern (pesticides, pharmaceuticals, heavy metals, polyaromatic hydrocarbons, a surfactant, and a plasticizer), each present at its safety limit concentration imposed by the European legislation, were prepared and tested for their toxic effects. The effects of the mixtures were assessed in 35 bioassays, based on 11 organisms representing different trophic levels. A consortium of 16 laboratories was involved in performing the bioassays. The mixtures elicited quantifiable toxic effects on some of the test systems... |
| Tipo: Text |
Palavras-chave: Bioassays; Effects; Mixtures; Ecotoxicology; Biomarkers. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00499/61115/64667.pdf |
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| Albarracín, I.; Pío, G.; Salomón, R.; Cravero, M.. |
| Los bioensayos con microalgas como bioindicadores de ecotoxicidad son útiles para evaluar el impacto ambiental provocado por las descargas de productos químicos y el vertido de efluentes. Siendo el fitoplancton el primer eslabón de la cadena trófica en los ecosistemas acuáticos, cualquier alteración de la composición de la comunidad microalgal, producto de estrés toxicológico, modifica la estructura y la función de todo el sistema. El Río Chubut, en Argentina, abastece de agua a varias localidades; se utiliza para el riego de superficies cultivadas y la generación de energía eléctrica. Su curso puede recibir filtraciones, impactando en la calidad higiénico-sanitaria de sus aguas. En el Valle Inferior del río Chubut (VIRCH) se utilizan diversos pesticidas... |
| Tipo: Preprint |
Palavras-chave: Bioassays; Bioassays; Http://aims.fao.org/aos/agrovoc/c_15731. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/3640 |
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| Suárez, G.; Romero, T.; Perigo, E.. |
| 1 The waste waters of the sugar industry, have constituted the main organic focuses of pollution of the Cuban coastal waters, during the years 1958 to 1991 worked around 160 sugar mill factories with a production average between 3,5 and 8,0 million metric ton sugar cane. During the last years this industry sensibly diminished its activity being considered the production of residual in 70 %, only working 25 % of the factories installed in Cuba, implying certain reduction of the sea impact. This report tries to interpret by means of toxicity bioassays the effects of waste waters of this industry on the survival of the spiny lobster Panulirus argus. Being that the values of LC50 were of 6,7; 5,6; 3,2 and 2,7 % for 24, 48, 72 and 96 h to the contact of... |
| Tipo: Preprint |
Palavras-chave: Bioassays; Bioassays; Http://aims.fao.org/aos/agrovoc/c_15731. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/3539 |
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| Carballo Hondal, O.; Arencibia Carballo, G.; Concepción, J.; Isla Molleda, M.. |
| Many organic and in organic contaminants originated from human activities are deposited and concentrated in aquatic sediments. The purpose of this review article is to analyze and discuss, the objectives, procedures and applications of bioassays on the triad of marine sediments, aiming at a reflection on the possibility of implementing regulations on the environmental monitoring of these studies in our country, so as to improve the environmental quality and its management on coastal zones. The main objective is to highlight the understanding of the adequate application and interpretation of bioassays. A summary of reports is presented, knowledge and analysis concerning marine sediments including, the chemical analysis, the direct determination of... |
| Tipo: Journal Contribution |
Palavras-chave: Toxicity; Sediments; Bioassays; Toxicity; Bioassays; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_15731. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/3670 |
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| Villamar, F.. |
| En el presente estudio se realiza un bioensayo para determinar el grado de concentración media letal del dispersante de petróleo BP 1100-WD, utilizando organismos vivos en condiciones de laboratorio. Se describe el método estadístico de Bliss. En definitiva el propósito de realizar bioensayos es la de comparar la toxicidad de diferentes compuestos y conocer la sensibilidad de las diversas especies, para determinar los mecanismos de los efectos de las sustancias ensayadas (Alcazar, 1988). |
| Tipo: Journal Contribution |
Palavras-chave: Bioassays; Toxicity; Larvae; Shrimp fisheries; Bioassays; Toxicity; Larvae. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/2164 |
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| Albarracín,I.; Pío, G.; Salomón, R.; Cravero, M.. |
| El hombre, en el afán de una agricultura más eficiente, permanentemente procura desarrollar productos plaguicidas, sin tener en cuenta que su uso indiscriminado provoca adaptaciones en plagas, tornándolas más resistentes. En el Valle Inferior del Río Chubut (VIRCH), provincia del Chubut, Argentina, los agricultores utilizan herbicidas organofosforados como el glifosato (sal isopropilamina del N-fosfonometil glicina), para el control de malezas en diversos cultivos, asumiendo el riesgo que implican las filtraciones en la calidad higiénico-sanitaria de sus aguas. Dado que las microalgas responden rápidamente a cambios ambientales debido a sus tiempos cortos de generación y a su papel como productores primarios en los ecosistemas acuáticos, se usan en ensayos... |
| Tipo: Journal Contribution |
Palavras-chave: Bioassays; Toxicity. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4629 |
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| Registros recuperados: 35 | |
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