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| Registros recuperados : 220 | |
| 161. |  | FAY, E. F.; CASTRO, V. L. S. S. de; SILVA, C. M. M. de S.; ABAKERLI, R. B.; ASSALIN, M. R.; EBERLIN, M. N. Metabolização do herbicida sulfentrazona: obtenção e identificação de 3-idroximetilsulfentrazona em urina de mamíferos. In: CONGRESO VIRTUAL IBEROAMERICANO SOBRE GESTIÓN DE CALIDAD EN LABORATORIOS, 4., 2007, Barcelona. Resúmenes... Barcelona: Ministerio de Agricultura, Pesca Y Alimentación, 2007. 2 p.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 162. | | CHAIM, A.; CASTRO, V. L. S. S. de; CORRALES, F. M.; GALVAO, J. A. H.; CABRAL, O. M. R.; NICOLELLA, G. Metodo para monitorar perdas na aplicacao de agrotoxicos na cultura do tomate. Pesquisa Agropecuaria Brasileira, Brasilia, v.34, n.5, p.741-747, 1999.| Biblioteca(s): Embrapa Meio Ambiente; Embrapa Unidades Centrais. |
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| 163. | | OLIVEIRA, L. P. de; LIMA, C. G. de; CASTRO, V. L. S. S. de; SIQUEIRA, M. C.; MAIA, A. de H. N. Modelo linear misto para avaliar toxicidade por doses repetidas. Revista da Estatística UFOP, Ouro Preto, v. 3, n. 3, 2014, p. 603-613. Edição dos trabalhos apresentados como pôsteres na 59ª Reunião Anual da Regional Brasileira da Sociedade Internacional de Biometria, Ouro Preto, 2014.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 164. | | CASTRO, V. L. S. S. de; MELLO, M. A. de; DINIZ, C. A. R.; MORITA, L. H. M.; ZUCCHI, T.; POLI, P. Neurodevelopmental effects of perinatal fenarimol exposure on rats. Reproductive Toxicology, Elmsford, v. 23, n. 1, p. 98-105, 2007.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 168. | | COA, F.; CLEMENTE, Z.; LOPES, J. R.; RODRIGUES NETO, L. L.; CASTRO, V. L. S. S. de; ALVES, O. L.; BARBIERI, E.; MARTINEZ, D. S. T. Nanotubos de carbono modificados com ácido húmico: preparação, caracterização e toxicidade em embriões de zebrafish. In: CONGRESSO BRASILEIRO DE ECOTOXICOLOGIA, 14., 2016, Curitiba. Anais.... Curitiba: Sociedade Brasileira de Ecotoxicologia. p. 887-888.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 169. | | CLEMENTE, Z.; SILVA, G. H. da; NUNES, M. C. S.; MARTINEZ, D. S. T.; MAURER-MORELLI, C. V.; THOMAZ, A. A.; CASTRO, V. L. S. S. de. Exploring the mechanisms of graphene oxide behavioral and morphological changes in zebrafish. Environmental Science and Pollution Research, v. 26, n. 29, p. 30508-30523, 2019.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 170. | | CLEMENTE, Z.; SILVA, G. H. da; MARTINEZ, D. S. T.; MAURER-MORELLI, C. V.; NUNES, M. C. S.; THOMAZ, A. A.; CASTRO, V. L. S. S. de. Exploring the mechanisms of graphene oxide toxicity to zebrafish embryo. Applied Research in Toxicology, v. 2, p. 56, 2017. Suppl. 1. Abstracts of International Symposium on Toxicity Assesment, 18., 2017, Limeira. Ref. ISTA18-705454.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 171. | | POLI, P.; MELLO, M. A. de; BUSCHINI, A.; CASTRO, V. L. S. S. de; RESTIVO, F. M.; ROSSI, C.; ZUCCHI, T. M. A. D. Evaluation of the genotoxicity induced by the fungicide fenarimol in mammalian and plant cells by use of the single-cell gel electrophoresis assay. Mutation Research, Amsterdam, v. 540, p. 57-66, 2003.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 172. | | CLEMENTE, Z.; CASTRO, V. L. S. S. de; FEITOSA, L. O.; LIMA, R.; JONSSON, C. M.; MAIA, A. de H. N.; FRACETO, L. F. Fish exposure to nano-TiO2 under different experimental conditions: methodological aspects for nanoecotoxicology investigations. Science of the Total Environment, Amsterdam, v. 463-464, p. 647-656, 2013.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 173. | | JESUS-HITZSCHKY, K. R. E. de; MASSINI, K. C.; ASSIS, O. B. G. de; CARNIEL, B. F.; CASTRO, V. L. S. S. de. Indicadores de impactos como diretrizes para a regulamentação das liberações das nanotecnologias no meio ambiente. In: SEMINÁRIO INTERNACIONAL DE NANOTECNOLOGIA, SOCIEDADE E MEIO AMBIENTE, 7., 2010, Rio de Janeiro. Resumos... Rio de Janeiro: FIOCRUZ, 2010.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 174. | | MEDEIROS, A. M. Z.; KHAN, L. U.; SILVA, G. H. da; OSPINA, C. A.; ALVES, O. L.; CASTRO, V. L. S. S. de; MARTINEZ, D. S. T. Graphene oxide-silver nanoparticle hybrid material: an integrated nanosafety study in zebrafish embryos. Ecotoxicology and Environmental Safety, v. 209, article 111776, 2021.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 175. | | COA, F.; CLEMENTE, Z.; LOPES, J. R.; RODRIGUES NETO, L. L.; ALVES, O. L.; CASTRO, V. L. S. S. de; BARBIERI, E.; MARTINEZ, D. S. T. Green mecanochemical process for carbon nanotubes coating with humic acid: application and ecotoxicity evaluation. In: ENCONTRO ANUAL DA SOCIEDADE BRASILEIRA DE PESQUISA EM MATERIAIS, 15., 2016, Campinas. [Abstracts...] Rio de Janeiro: Sociedade Brasileira de Pesquisas em Materiais, 2016. Resumo B6SZ.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 178. | | LIMA, M. A. de; BOEIRA, R. C.; CASTRO, V. L. S. S. de; LIGO, M. A. V.; CABRAL, O. M. R.; VIEIRA, R. F.; LUIZ, A. J. B. Estimativa das emissões de gases de efeito estufa provenientes de atividades agrícolas no Brasil. In: LIMA, M. A. de; CABRAL, O. M. R.; GONZALEZ MIGUEZ, J. D. (Ed.). Mudanças climáticas globais e a agropecuária brasileira. Jaguariúna: Embrapa Meio Ambiente, 2001. 397p. Cap. 7, p.169-189.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 179. | | BECARO, A. A.; OLIVEIRA, L. P. de; CASTRO, V. L. S. S. de; SIQUEIRA, M. C.; BRANDAO, H. de M.; CORREA, D. S.; FERREIRA, M. D. Effects of silver nanoparticles prenatal exposure on rat offspring development. Environmental Toxicology and Pharmacology, v. 81, article 103546, 2021.| Biblioteca(s): Embrapa Gado de Leite; Embrapa Instrumentação; Embrapa Meio Ambiente. |
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| 180. | | JONSSON, C. M.; CLEMENTE, Z.; CASTRO, V. L. S. S. de; CASTANHA, R. F.; VALLIM, J. H.; DOMINGOS, N.; BLUMEL, S. Effects of graphene oxide on aquatic macrophyte under the influence of humic substances. In: SETAC EUROPE ANNUAL MEETING, 26., 2016, Nantes. Proceedings... Brussels: SETAC, 2016. Ref. TU038. p. 201-202.| Biblioteca(s): Embrapa Meio Ambiente. |
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| Registros recuperados : 220 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
04/04/2017 |
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Data da última atualização: |
10/07/2017 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
JONSSON, C. M.; CLEMENTE, Z.; CASTRO, V. L. S. S. de; CASTANHA, R. F.; VALLIM, J. H.; DOMINGOS, N.; BLUMEL, S. |
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Afiliação: |
CLAUDIO MARTIN JONSSON, CNPMA; Z. CLEMENTE; VERA LUCIA SCHERHOLZ S DE CASTRO, CNPMA; RODRIGO FERNANDES CASTANHA, CNPMA; JOSE HENRIQUE VALLIM, CNPMA; NEUSA DOMINGOS, CNPMA; S. BLUMEL. |
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Título: |
Effects of graphene oxide on aquatic macrophyte under the influence of humic substances. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: SETAC EUROPE ANNUAL MEETING, 26., 2016, Nantes. Proceedings... Brussels: SETAC, 2016. Ref. TU038. |
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Páginas: |
p. 201-202. |
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Idioma: |
Inglês |
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Conteúdo: |
The behavior of nanostructured graphene oxide (GO) in the environment is complex and must be completely understood to evaluate the risk involved. Studies show that humic acid (HA) can stabilize nanomaterials in water and change its behavior. The aquatic macrophyte duckweed (Lemna minor) is a good plant model for adverse effects evaluation of many test-materials due to its fast growth and small size. This study assessed the effect of GO, with and without HA, on the growth of L. minor on fronds number and biomass changes. The plants were exposed during 7 days to the nominal concentrations of GO equals to 0.0 (control), 0.1, 1.0, 10.0 and 100.0 mg L-1, in the absence or in the presence of 20 mg L-1 of HA. Tests were conducted in multiwell polystyreneplates where each well contained two fronds at the start of the experiment. The number of replicates for each test?concentration was 24 wells. The plants were exposed to a constant photoperiod (24:0, light:dark cycle) supplied by white fluorescent lamps (~700 lux) at the temperature of 20± 2 ºC. The fronds number was counted daily and the wet weight was assessed at the end of the experiment. The concentration that promoted 50% of inhibition in the growth rate in terms of fronds number (EC50-7d growth) and the concentration that promoted 50% of wet weight reduction (EC50-7d biomass) were calculated. The reduction of the growth rate by GO at the concentration of 100 mg L-1 was remarkable detected (P < 0.001) in the absence of the humic substance (HA). The HA seems to contribute with such reduction because this effect was also observed at the GO concentrations of 1.0, 10.0 and 100.0 mg L-1 in the presence of the humic substance (p< 0.01, p< 0.001 and p< 0.001, respectively). Although, the calculated EC50-7d growth for these exposures, with and without HA, was >100 mg L-1. This value attributes a practically non-toxicity for the test-material in terms of fronds production. On the other hand, the calculated EC50-7d biomass for the GO in the presence of HA or not was 2.8 and 2.4 mg L-1 respectively. These results indicate that the adverse effects of GO in L. minor are more pronounced on the biomass production since it was clearly observed that reductions in the fronds sizes were greater than in the fronds number. The EC50-7d biomass values assigns a moderate toxicity of GO to L. minor and these data may be useful for the establishment of maximum concentrations limits of this material in water bodies. MenosThe behavior of nanostructured graphene oxide (GO) in the environment is complex and must be completely understood to evaluate the risk involved. Studies show that humic acid (HA) can stabilize nanomaterials in water and change its behavior. The aquatic macrophyte duckweed (Lemna minor) is a good plant model for adverse effects evaluation of many test-materials due to its fast growth and small size. This study assessed the effect of GO, with and without HA, on the growth of L. minor on fronds number and biomass changes. The plants were exposed during 7 days to the nominal concentrations of GO equals to 0.0 (control), 0.1, 1.0, 10.0 and 100.0 mg L-1, in the absence or in the presence of 20 mg L-1 of HA. Tests were conducted in multiwell polystyreneplates where each well contained two fronds at the start of the experiment. The number of replicates for each test?concentration was 24 wells. The plants were exposed to a constant photoperiod (24:0, light:dark cycle) supplied by white fluorescent lamps (~700 lux) at the temperature of 20± 2 ºC. The fronds number was counted daily and the wet weight was assessed at the end of the experiment. The concentration that promoted 50% of inhibition in the growth rate in terms of fronds number (EC50-7d growth) and the concentration that promoted 50% of wet weight reduction (EC50-7d biomass) were calculated. The reduction of the growth rate by GO at the concentration of 100 mg L-1 was remarkable detected (P < 0.001) in the absence of the humi... Mostrar Tudo |
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Thesaurus NAL: |
Graphene; Macrophytes. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/161623/1/jonsson.pdf
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Marc: |
LEADER 03181nam a2200217 a 4500
001 2068118
005 2017-07-10
008 2016 bl uuuu u00u1 u #d
100 1 $aJONSSON, C. M.
245 $aEffects of graphene oxide on aquatic macrophyte under the influence of humic substances.$h[electronic resource]
260 $aIn: SETAC EUROPE ANNUAL MEETING, 26., 2016, Nantes. Proceedings... Brussels: SETAC, 2016. Ref. TU038.$c2016
300 $ap. 201-202.
520 $aThe behavior of nanostructured graphene oxide (GO) in the environment is complex and must be completely understood to evaluate the risk involved. Studies show that humic acid (HA) can stabilize nanomaterials in water and change its behavior. The aquatic macrophyte duckweed (Lemna minor) is a good plant model for adverse effects evaluation of many test-materials due to its fast growth and small size. This study assessed the effect of GO, with and without HA, on the growth of L. minor on fronds number and biomass changes. The plants were exposed during 7 days to the nominal concentrations of GO equals to 0.0 (control), 0.1, 1.0, 10.0 and 100.0 mg L-1, in the absence or in the presence of 20 mg L-1 of HA. Tests were conducted in multiwell polystyreneplates where each well contained two fronds at the start of the experiment. The number of replicates for each test?concentration was 24 wells. The plants were exposed to a constant photoperiod (24:0, light:dark cycle) supplied by white fluorescent lamps (~700 lux) at the temperature of 20± 2 ºC. The fronds number was counted daily and the wet weight was assessed at the end of the experiment. The concentration that promoted 50% of inhibition in the growth rate in terms of fronds number (EC50-7d growth) and the concentration that promoted 50% of wet weight reduction (EC50-7d biomass) were calculated. The reduction of the growth rate by GO at the concentration of 100 mg L-1 was remarkable detected (P < 0.001) in the absence of the humic substance (HA). The HA seems to contribute with such reduction because this effect was also observed at the GO concentrations of 1.0, 10.0 and 100.0 mg L-1 in the presence of the humic substance (p< 0.01, p< 0.001 and p< 0.001, respectively). Although, the calculated EC50-7d growth for these exposures, with and without HA, was >100 mg L-1. This value attributes a practically non-toxicity for the test-material in terms of fronds production. On the other hand, the calculated EC50-7d biomass for the GO in the presence of HA or not was 2.8 and 2.4 mg L-1 respectively. These results indicate that the adverse effects of GO in L. minor are more pronounced on the biomass production since it was clearly observed that reductions in the fronds sizes were greater than in the fronds number. The EC50-7d biomass values assigns a moderate toxicity of GO to L. minor and these data may be useful for the establishment of maximum concentrations limits of this material in water bodies.
650 $aGraphene
650 $aMacrophytes
700 1 $aCLEMENTE, Z.
700 1 $aCASTRO, V. L. S. S. de
700 1 $aCASTANHA, R. F.
700 1 $aVALLIM, J. H.
700 1 $aDOMINGOS, N.
700 1 $aBLUMEL, S.
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