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 | Acesso ao texto completo restrito à biblioteca da Embrapa Meio Ambiente. Para informações adicionais entre em contato com cnpma.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
25/02/2015 |
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Data da última atualização: |
16/10/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CLEMENTE, Z.; GRILLO, R.; JONSSON, C. M.; SANTOS, N. Z. P. dos; FEITOSA, L. O.; LIMA, R. de; FRACETO, L. F. |
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Afiliação: |
ZAIRA CLEMENTE, IB-Unicamp; RENATO GRILLO, IB-Unicamp; CLAUDIO MARTIN JONSSON, CNPMA; NATHALIA ZOCAL PEREIRA DOS SANTOS, Universidade de Sorocaba; LEANDRO OLIVEIRA FEITOSA, UNESP-Sorocaba; RENATA DE LIMA, Universidade de Sorocaba; LEONARDO FERNANDES FRACETO, UNESP-Sorocaba. |
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Título: |
Ecotoxicological evaluation of poly(epsilon-caprolactone) nanocapsules containing triazine herbicides. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Journal of Nanoscience and Nanotechnology, Stevenson Ranch, v. 14, n. 7, p. 4911-4917, 2014. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The triazine class of herbicides includes the compounds ametryn, atrazine, and simazine, which are used to control weeds in plantations of crops such as maize, sorghum, and sugar cane. Despite their acceptance in agriculture, these herbicides can be dangerous to the environment, depending on their toxicity, the degree of contamination, and the duration of exposure. Controlled release systems are increasingly used to mitigate problems of toxicity and minimize environmental impacts, and can also increase herbicide efficiency. The objective of this work was to prepare poly(epsilon-caprolactone) nanocapsules containing ametryn and atrazine, and evaluate their toxicity to aquatic organisms as well as in cytogenetic tests employing human lymphocyte cultures. The PCL nanocapsules were prepared according to the interfacial deposition of pre-formed polymer method. Ecotoxicological assays were performed with the alga Pseudokirchneriella subcapitata and the microcrustacean Daphnia similis. The cytogenetic tests consisted of observing mitotic index alterations after exposing lymphocyte cell cultures to different formulations. Encapsulation of the herbicides in the nanocapsules resulted in lower toxicity to the alga and higher toxicity to the microcrustacean, compared to the herbicides alone. The cytogenetic tests showed that formulations of nanocapsules containing the herbicides were less toxic than the herbicides alone. The findings indicate the potential of the nanocapsule formulations in agricultural applications, where they could help to reduce the quantities of herbicides used as well as impacts on the environment and human health. MenosAbstract: The triazine class of herbicides includes the compounds ametryn, atrazine, and simazine, which are used to control weeds in plantations of crops such as maize, sorghum, and sugar cane. Despite their acceptance in agriculture, these herbicides can be dangerous to the environment, depending on their toxicity, the degree of contamination, and the duration of exposure. Controlled release systems are increasingly used to mitigate problems of toxicity and minimize environmental impacts, and can also increase herbicide efficiency. The objective of this work was to prepare poly(epsilon-caprolactone) nanocapsules containing ametryn and atrazine, and evaluate their toxicity to aquatic organisms as well as in cytogenetic tests employing human lymphocyte cultures. The PCL nanocapsules were prepared according to the interfacial deposition of pre-formed polymer method. Ecotoxicological assays were performed with the alga Pseudokirchneriella subcapitata and the microcrustacean Daphnia similis. The cytogenetic tests consisted of observing mitotic index alterations after exposing lymphocyte cell cultures to different formulations. Encapsulation of the herbicides in the nanocapsules resulted in lower toxicity to the alga and higher toxicity to the microcrustacean, compared to the herbicides alone. The cytogenetic tests showed that formulations of nanocapsules containing the herbicides were less toxic than the herbicides alone. The findings indicate the potential of the nanocapsule f... Mostrar Tudo |
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Palavras-Chave: |
Environmental Chemistry; Polymeric nanoparticles; Pseudokirchneriella subcapitata. |
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Thesagro: |
Herbicida; Toxicologia. |
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Thesaurus Nal: |
Daphnia similis; Ecotoxicology; genotoxicity; Herbicides; Nanocapsules; Polymer nanocomposites; Triazines. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 02681naa a2200337 a 4500
001 2009890
005 2015-10-16
008 2014 bl uuuu u00u1 u #d
100 1 $aCLEMENTE, Z.
245 $aEcotoxicological evaluation of poly(epsilon-caprolactone) nanocapsules containing triazine herbicides.$h[electronic resource]
260 $c2014
520 $aAbstract: The triazine class of herbicides includes the compounds ametryn, atrazine, and simazine, which are used to control weeds in plantations of crops such as maize, sorghum, and sugar cane. Despite their acceptance in agriculture, these herbicides can be dangerous to the environment, depending on their toxicity, the degree of contamination, and the duration of exposure. Controlled release systems are increasingly used to mitigate problems of toxicity and minimize environmental impacts, and can also increase herbicide efficiency. The objective of this work was to prepare poly(epsilon-caprolactone) nanocapsules containing ametryn and atrazine, and evaluate their toxicity to aquatic organisms as well as in cytogenetic tests employing human lymphocyte cultures. The PCL nanocapsules were prepared according to the interfacial deposition of pre-formed polymer method. Ecotoxicological assays were performed with the alga Pseudokirchneriella subcapitata and the microcrustacean Daphnia similis. The cytogenetic tests consisted of observing mitotic index alterations after exposing lymphocyte cell cultures to different formulations. Encapsulation of the herbicides in the nanocapsules resulted in lower toxicity to the alga and higher toxicity to the microcrustacean, compared to the herbicides alone. The cytogenetic tests showed that formulations of nanocapsules containing the herbicides were less toxic than the herbicides alone. The findings indicate the potential of the nanocapsule formulations in agricultural applications, where they could help to reduce the quantities of herbicides used as well as impacts on the environment and human health.
650 $aDaphnia similis
650 $aEcotoxicology
650 $agenotoxicity
650 $aHerbicides
650 $aNanocapsules
650 $aPolymer nanocomposites
650 $aTriazines
650 $aHerbicida
650 $aToxicologia
653 $aEnvironmental Chemistry
653 $aPolymeric nanoparticles
653 $aPseudokirchneriella subcapitata
700 1 $aGRILLO, R.
700 1 $aJONSSON, C. M.
700 1 $aSANTOS, N. Z. P. dos
700 1 $aFEITOSA, L. O.
700 1 $aLIMA, R. de
700 1 $aFRACETO, L. F.
773 $tJournal of Nanoscience and Nanotechnology, Stevenson Ranch$gv. 14, n. 7, p. 4911-4917, 2014.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
03/02/2006 |
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Data da última atualização: |
03/02/2006 |
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Autoria: |
ZÚÑIGA, U. F. R.; PEREIRA, D. M. B.; SILVA, W. T. L. da; ROCHA, J. C. |
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Título: |
Impacto da fotoirradiação nas propriedades ópticas das substâncias húmicas aquáticas da bacia amazônica. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
In: WOKSHOP DA PÓS-GRADUAÇAO, 9.; 2005, São Carlos. A contribuição do IQSC para a inovação e o desenvolvimento científico e tecnológico. Resumos... São Carlos: IQSC, 2005. p. 114. |
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Idioma: |
Inglês |
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Conteúdo: |
O objetivo do trabalho é a obtenção dos parâmetros cinéticos da fotodegradação e a relação com a estrutura derivada da espectroscopia de ressonância magnética nuclear (RMN), ganhando entendimento na sua contribuição dentro do ciclo geoquímico do C, e a natureza dos constitiuintes cromóforos responsáveis do espectro amorfo típico da MOD. |
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Palavras-Chave: |
Fotodegradação; SHA; Técnicas espectroscópicas. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01079naa a2200193 a 4500
001 1029461
005 2006-02-03
008 2005 bl --- 0-- u #d
100 1 $aZÚÑIGA, U. F. R.
245 $aImpacto da fotoirradiação nas propriedades ópticas das substâncias húmicas aquáticas da bacia amazônica.
260 $c2005
520 $aO objetivo do trabalho é a obtenção dos parâmetros cinéticos da fotodegradação e a relação com a estrutura derivada da espectroscopia de ressonância magnética nuclear (RMN), ganhando entendimento na sua contribuição dentro do ciclo geoquímico do C, e a natureza dos constitiuintes cromóforos responsáveis do espectro amorfo típico da MOD.
653 $aFotodegradação
653 $aSHA
653 $aTécnicas espectroscópicas
700 1 $aPEREIRA, D. M. B.
700 1 $aSILVA, W. T. L. da
700 1 $aROCHA, J. C.
773 $tIn: WOKSHOP DA PÓS-GRADUAÇAO, 9.; 2005, São Carlos. A contribuição do IQSC para a inovação e o desenvolvimento científico e tecnológico. Resumos... São Carlos: IQSC, 2005. p. 114.
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