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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
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Data corrente: |
04/04/1995 |
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Data da última atualização: |
12/12/2011 |
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Autoria: |
SANTANA, J. C. F. de; SANTOS, E. O. dos; CRISOSTOMO, J. R.; CAVALCANTI, F. B.; GOMES, I. F. |
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Afiliação: |
EMBRAPA-CNPA. |
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Título: |
Avaliacao de genotipos de algodoeiro herbaceo no Nordeste Brasileiro. |
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Ano de publicação: |
1984 |
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Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, v.19, n.6, p.679-688, jun. 1984. |
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Idioma: |
Português |
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Notas: |
Separata. |
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Conteúdo: |
Estudou-se o comportamento de novas linhagens de algodoeiro herbaceo (Gossypium hirsutum L.r. latifolium Hutch) desenvolvidas pelo Centro Nacional de Pesquisa do Algodao (CNPA) e por outras instituicoes de pesquisa do Pais. Observaram-se os aspectos de rendimento de algodao em caroco, peso de capulho, peso de 100 sementes, e percentagem, comprimento, uniformidade e resistencia de fibra. Utilizaram-se os dados fornecidos pelos Ensaios Regionais de Cultivares, delineado em blocos ao acaso com nove tratamentos e oito repeticoes e conduzidos em oito diferentes localidades do Nordeste do Brasil, no ano de 1981. As novas linhagens revelaram um bom desempenho para o aspecto de rendimento que varioude 1.055 a 1.634kg/ha. Estas novas linhagens possuem as qualidades exigidas pela industria testil nacional. O genotipo BR1 apresentou maior rendimento (1.166kg/ha), seguido pelo CNPA 77-150 (1.157kg/ha) e Parana (1.130kg/ha). Destacaram-se para peso de capulho o IAC 17 e o CNPA 78-SME4 e para percentagem de fibra o IAC 17 e o Parana 1. |
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Palavras-Chave: |
Cultivar; Gossypium hirsutum L; Teste de linhagem. |
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Thesagro: |
Algodão. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01681naa a2200229 a 4500
001 1074807
005 2011-12-12
008 1984 bl --- 0-- u #d
100 1 $aSANTANA, J. C. F. de
245 $aAvaliacao de genotipos de algodoeiro herbaceo no Nordeste Brasileiro.
260 $c1984
500 $aSeparata.
520 $aEstudou-se o comportamento de novas linhagens de algodoeiro herbaceo (Gossypium hirsutum L.r. latifolium Hutch) desenvolvidas pelo Centro Nacional de Pesquisa do Algodao (CNPA) e por outras instituicoes de pesquisa do Pais. Observaram-se os aspectos de rendimento de algodao em caroco, peso de capulho, peso de 100 sementes, e percentagem, comprimento, uniformidade e resistencia de fibra. Utilizaram-se os dados fornecidos pelos Ensaios Regionais de Cultivares, delineado em blocos ao acaso com nove tratamentos e oito repeticoes e conduzidos em oito diferentes localidades do Nordeste do Brasil, no ano de 1981. As novas linhagens revelaram um bom desempenho para o aspecto de rendimento que varioude 1.055 a 1.634kg/ha. Estas novas linhagens possuem as qualidades exigidas pela industria testil nacional. O genotipo BR1 apresentou maior rendimento (1.166kg/ha), seguido pelo CNPA 77-150 (1.157kg/ha) e Parana (1.130kg/ha). Destacaram-se para peso de capulho o IAC 17 e o CNPA 78-SME4 e para percentagem de fibra o IAC 17 e o Parana 1.
650 $aAlgodão
653 $aCultivar
653 $aGossypium hirsutum L
653 $aTeste de linhagem
700 1 $aSANTOS, E. O. dos
700 1 $aCRISOSTOMO, J. R.
700 1 $aCAVALCANTI, F. B.
700 1 $aGOMES, I. F.
773 $tPesquisa Agropecuaria Brasileira$gv.19, n.6, p.679-688, jun. 1984.
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Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
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Biblioteca |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
25/01/2016 |
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Data da última atualização: |
15/04/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
GRILLO, R.; CLEMENTE, Z.; OLIVEIRA, J. L. de; CAMPOS, E. V. R.; CHALUPE, V. C.; JONSSON, C. M.; LIMA, R.; SANCHES, G.; NISHISAKA, C. S.; ROSA, A. H.; OEHLKE, K. |
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Afiliação: |
RENATO GRILLO, UNESP Sorocaba; ZAIRA CLEMENTE, IB UNICAMP; JHONES LUIS DE OLIVEIRA, UNESP Sorocaba; ESTEFANIA VANGELIE RAMOS CAMPOS, UNESP Sorocaba; VICTOR COLOTTI CHALUPE; CLAUDIO MARTIN JONSSON, CNPMA; RENATA LIMA, UNISO; GABRIELA SANCHES, UNISO; CAROLINE SAYURI NISHISAKA, UNISO; ANDRE HENRIQUE ROSA, UNESP Sorocaba; KATHLEEN OEHLKE, Max Rubner-Institut. |
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Título: |
Chitosan nanoparticles loaded the herbicide paraquat: the influence of the aquatic humic substances on the colloidal stability and toxicity. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Journal of Hazardous Materials, Amsterdam, v. 286, p. 562?572, 2015. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Polymeric nanoparticles have been developed for several applications, among them as carrier system of pesticides. However, few studies have investigated the fate of these materials in the environment in relation to colloidal stability and toxicity. In nature, humic substances are the main agents responsible for complexation with metals and organic compounds, as well as responsible for the dynamics of these nanoparticles in aquatic and terrestrial environments. In this context, the evaluation of the influence of aquatic humic substances (AHS) on the colloidal stability and toxicity of polymeric nanoparticles of chitosan/tripolyphosphate with or without paraquat was performed. In this study, the nanoparticles were prepared by the ionic gelation method and characterized by size distribution measurements (DLS and NTA), zeta potential, infrared and fluorescence spectroscopy. Allium cepa genotoxicity studies and ecotoxicity assays with the alga Pseudokirchneriella subcapitata were used to investigate the effect of aquatic humic substances (AHS) on the toxicity of this delivery system. No changes were observed in the physical?chemical stability of the nanoparticles due to the presence of AHS using DLS and NTA techniques. However some evidence of interaction between the nanoparticles and AHS was observed by infrared and fluorescence spectroscopies. The ecotoxicity and genotoxicity assays showed that humic substances can decrease the toxic effects of nanoparticles containing paraquat. These results are interesting because they are important for understanding the interaction of these nanostructured carrier systems with species present in aquatic ecosystems such as humic substances, and in this way, opening new perspectives for studies on the dynamics of these carrier systems in the ecosystem. MenosAbstract: Polymeric nanoparticles have been developed for several applications, among them as carrier system of pesticides. However, few studies have investigated the fate of these materials in the environment in relation to colloidal stability and toxicity. In nature, humic substances are the main agents responsible for complexation with metals and organic compounds, as well as responsible for the dynamics of these nanoparticles in aquatic and terrestrial environments. In this context, the evaluation of the influence of aquatic humic substances (AHS) on the colloidal stability and toxicity of polymeric nanoparticles of chitosan/tripolyphosphate with or without paraquat was performed. In this study, the nanoparticles were prepared by the ionic gelation method and characterized by size distribution measurements (DLS and NTA), zeta potential, infrared and fluorescence spectroscopy. Allium cepa genotoxicity studies and ecotoxicity assays with the alga Pseudokirchneriella subcapitata were used to investigate the effect of aquatic humic substances (AHS) on the toxicity of this delivery system. No changes were observed in the physical?chemical stability of the nanoparticles due to the presence of AHS using DLS and NTA techniques. However some evidence of interaction between the nanoparticles and AHS was observed by infrared and fluorescence spectroscopies. The ecotoxicity and genotoxicity assays showed that humic substances can decrease the toxic effects of nanoparticles containin... Mostrar Tudo |
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Palavras-Chave: |
Nanopartículas; Natural organic matter; Polymeric nanoparticles; Quitosana. |
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Thesagro: |
Agrotóxico; Herbicida; Impacto ambiental; Matéria orgânica; Paraquat; Toxidez. |
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Thesaurus NAL: |
Chitosan; Herbicides; Nanoparticles; Toxicity. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 02991naa a2200409 a 4500
001 2034959
005 2016-04-15
008 2015 bl uuuu u00u1 u #d
100 1 $aGRILLO, R.
245 $aChitosan nanoparticles loaded the herbicide paraquat$bthe influence of the aquatic humic substances on the colloidal stability and toxicity.$h[electronic resource]
260 $c2015
520 $aAbstract: Polymeric nanoparticles have been developed for several applications, among them as carrier system of pesticides. However, few studies have investigated the fate of these materials in the environment in relation to colloidal stability and toxicity. In nature, humic substances are the main agents responsible for complexation with metals and organic compounds, as well as responsible for the dynamics of these nanoparticles in aquatic and terrestrial environments. In this context, the evaluation of the influence of aquatic humic substances (AHS) on the colloidal stability and toxicity of polymeric nanoparticles of chitosan/tripolyphosphate with or without paraquat was performed. In this study, the nanoparticles were prepared by the ionic gelation method and characterized by size distribution measurements (DLS and NTA), zeta potential, infrared and fluorescence spectroscopy. Allium cepa genotoxicity studies and ecotoxicity assays with the alga Pseudokirchneriella subcapitata were used to investigate the effect of aquatic humic substances (AHS) on the toxicity of this delivery system. No changes were observed in the physical?chemical stability of the nanoparticles due to the presence of AHS using DLS and NTA techniques. However some evidence of interaction between the nanoparticles and AHS was observed by infrared and fluorescence spectroscopies. The ecotoxicity and genotoxicity assays showed that humic substances can decrease the toxic effects of nanoparticles containing paraquat. These results are interesting because they are important for understanding the interaction of these nanostructured carrier systems with species present in aquatic ecosystems such as humic substances, and in this way, opening new perspectives for studies on the dynamics of these carrier systems in the ecosystem.
650 $aChitosan
650 $aHerbicides
650 $aNanoparticles
650 $aToxicity
650 $aAgrotóxico
650 $aHerbicida
650 $aImpacto ambiental
650 $aMatéria orgânica
650 $aParaquat
650 $aToxidez
653 $aNanopartículas
653 $aNatural organic matter
653 $aPolymeric nanoparticles
653 $aQuitosana
700 1 $aCLEMENTE, Z.
700 1 $aOLIVEIRA, J. L. de
700 1 $aCAMPOS, E. V. R.
700 1 $aCHALUPE, V. C.
700 1 $aJONSSON, C. M.
700 1 $aLIMA, R.
700 1 $aSANCHES, G.
700 1 $aNISHISAKA, C. S.
700 1 $aROSA, A. H.
700 1 $aOEHLKE, K.
773 $tJournal of Hazardous Materials, Amsterdam$gv. 286, p. 562?572, 2015.
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