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| Registros recuperados: 17 | |
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| CASTRO, V. L. S. S. de; CLEMENTE, Z.; JONSSON, C. M.; SILVA, M. S. G. M. e; VALLIM, J. H.; MEDEIROS, A. M. Z.; MARTINEZ, D. S. T.. |
| O objetivo deste trabalho foi determinar valores de concentração sem efeito previsível (PNEC) para óxido de grafeno (GO), considerando a presença ou ausência de ácido húmico no meio aquático. Para isso, foram realizados testes toxicológicos e determinados os valores de concentração de efeito não observado (CENO) para 9 organismos. A PNEC de GO no compartimento aquático, abaixo da qual os efeitos adversos provavelmente não ocorrerão durante a exposição a longo ou curto prazo, foi estimada em 20 ?g/L (na ausência de ácido húmico) e 5 ?g/L (na presença de ácido húmico). Estes dados contribuem para avaliação de risco da nanotecnologia. ?- The objective of this work was to estimate the predicted no effect concentration (PNEC) for grapheme oxide (GO),... |
| Tipo: Separatas |
Palavras-chave: PNEC; Nanotoxicologia; Nanomaterial; Ecotoxicologia; Nanotoxicology; Óxido de grafeno; Composto químico; Toxidez; Organismo aquático; Impacto ambiental; Carbono; Graphene oxide; Ecotoxicology; Humic acids; Aquatic organisms; Nanomaterials. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1085931 |
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| FERREIRA, A. D.; LAURA, V. A.; ARAUJO, A. R. de; PEDRINHO, D. R.; BUNGENSTAB, D. J.; MARTINS, J. L. F.. |
| Carbon sequestration can be defined as the carbon dioxide (CO2) removal process from the atmosphere and subsequent release ofoxygen (O2) for several terrestrial or aquatic organisms, avoiding the permanence of this gas in the atmosphere. Carbon sequestration by trees is a kind of Clean Development Mechanism (CDM), in which trees remove CO2 from the atmosphere and stock it in different plant compartments (leaves, branches, stems and roots). With a large territory, favorable climate for plant growth throughout the year and advanced silvicultural technology, Brazil has strong vocation for forestry, fully complying with the provisions of the CDM. Eucalyptus plantations are highly efficient in atmospheric CO2 removal, because they can store large amounts of... |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Dióxido de carbono; Oxigênio; Organismo aquático; Eucalipto; Carbon sequestration; Carbon dioxide; Aquatic organisms; Eucalyptus. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1061960 |
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| Cormier, Bettie; Gambardella, Chiara; Tato, Tania; Perdriat, Quentin; Costa, Elisa; Veclin, Cloé; Le Bihanic, Florane; Grassl, Bruno; Dubocq, Florian; Kärrman, Anna; Van Arkel, Kim; Lemoine, Soazig; Lagarde, Fabienne; Morin, Benedicte; Garaventa, Francesca; Faimali, Marco; Cousin, Xavier; Bégout, Marie-laure; Beiras, Ricardo; Cachot, Jerome. |
| Microplastics are ubiquitous in aquatic ecosystems, but little information is currently available on the dangers and risks to living organisms. In order to assess the ecotoxicity of environmental microplastics (MPs), samples were collected from the beaches of two islands in the Guadeloupe archipelago, Petit-Bourg (PB) located on the main island of Guadeloupe and Marie-Galante (MG) on the second island of the archipelago. These samples have a similar polymer composition with mainly polyethylene (PE) and polypropylene (PP). However, these two samples are very dissimilar with regard to their contamination profile and their toxicity. MPs from MG contain more lead, cadmium and organochlorine compounds while those from PB have higher levels of copper, zinc and... |
| Tipo: Text |
Palavras-chave: Environmental microplastics; Leachates; Early life stages; Aquatic organisms; Toxicity. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00661/77276/78711.pdf |
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| 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 |
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| CLEMENTE, Z.; CASTRO, V. L. S. S. de; JONSSON, C. M.; FRACETO, L. F.. |
| The production and use of synthetic nanoparticles is growing rapidly, and therefore the presence of these materials in the environment seems inevitable. Titanium dioxide (TiO2) presents various possible uses in industry, cosmetics, and even in the treatment of contaminated environments. Studies about the potential ecotoxicological risks of TiO2 nanoparticles (nano-TiO2) have been published but their results are still inconclusive. It should be noted that the properties of the diverse nano-TiO2 must be considered in order to establish experimental models to study their toxicity to environmentally relevant species. Moreover, the lack of descriptions and characterization of nanoparticles, as well as differences in the experimental conditions employed, have... |
| Tipo: Separatas |
Palavras-chave: Nano-TiO2; Nanotecnologia; Dióxido de titânio; Impato ambiental; Organismo aquático; Substância tóxica; Toxidez; Nanotechnology; Aquatic organisms; Ecotoxicology. |
| Ano: 2012 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/930629 |
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| CRUZ, J. V.; MAGALHAES, W. L. E.; CADEMARTORI, P. H. G.; DORTA D. J.; OLIVEIRA, D. P. de; LEME, D. M.. |
| Many public health measures to mitigate the spread of SARS-CoV-2 were adopted worldwide, and particularly to the environmental measure of regular cleaning and disinfection of surfaces, the increased use of disinfectant products raises environmental concerns. Quaternary ammonium compounds (QACs), povidone-iodine (PVP-I), chloroxylenol (PCMX) and chlorhexidine (CHX) are the active ingredients of most disinfectant products due to their effectiveness against various microbiological agents. Although presenting antimicrobial efficacy, these biocides have been associated with impacts on aquatic life. For instance, QACs can induce toxicity to Aliivibrio fischeri and fish (different species). Gill and liver damages are verified in Cyprinus carpio after exposure to... |
| Tipo: Artigo de periódico |
Palavras-chave: SARS-CoV-2; Greener Alternatives; Quaternary ammonium compounds; Aquatic organisms. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1139354 |
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| Guiral, D.; Etien, N.. |
| Cet article de synthèse décrit la composition et l'organisation des végétations colonisant les berges de la lagune Ebrié et fournit des données originales sur l'évolution récente de ces associations consécutivement à l'introduction accidentelle de 2 nouvelles espèces de macrophytes flottantes (Salvinia molesta et Eichhornia crassipes). Un historique de l'invasion de ces 2 espèces en Côte d'Ivoire est présenté et restitué dans un cadre plus général retraçant à partir d'un travail bibliographique l'expansion mondiale et plus spécifiquement africaine de ces 2 espèces. Une étude comparative des compositions chimiques (C,N,P)des 3 espèces de macrophytes aquatiques flottantes (Eichhornia crassipes, Salvinia molesta, Pistia stratiotes) colonisant la lagune Ebrié... |
| Tipo: Journal Contribution |
Palavras-chave: Aquatic organisms. |
| Ano: 1991 |
URL: http://hdl.handle.net/1834/5165 |
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| Registros recuperados: 17 | |
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