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Registro Completo |
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Biblioteca(s): |
Embrapa Hortaliças. |
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Data corrente: |
05/06/2001 |
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Data da última atualização: |
05/06/2001 |
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Autoria: |
IMENES, S. D. L.; CAMPOS, T. B. de; RODRIGUES NETO, S. M.; BERGMANN, E. C. |
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Título: |
Avaliacao da atratividade de feromonio sexual sintetico da traca das cruciferas, Plutella xylostella (L.) (Lepidoptera: Plutellidae), em cultivo organico de repolho. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Arquivos do Instituto Biologico, Sao Paulo, v.66, p.109, 1999. |
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Idioma: |
Português |
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Notas: |
Resumo. Suplemento. |
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Palavras-Chave: |
Artificial Phreromone; Cultivo organico; Diamondback; Feromonio sinteitico; Organic cultivation; Pest insect. |
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Thesagro: |
Brassica Oleracea Capitata; Inseto; Plutella Xylostella; Praga; Repolho; Traça das Crucíferas. |
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Thesaurus Nal: |
cabbage. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00987naa a2200313 a 4500
001 1769835
005 2001-06-05
008 1999 bl uuuu u00u1 u #d
100 1 $aIMENES, S. D. L.
245 $aAvaliacao da atratividade de feromonio sexual sintetico da traca das cruciferas, Plutella xylostella (L.) (Lepidoptera$bPlutellidae), em cultivo organico de repolho.
260 $c1999
500 $aResumo. Suplemento.
650 $acabbage
650 $aBrassica Oleracea Capitata
650 $aInseto
650 $aPlutella Xylostella
650 $aPraga
650 $aRepolho
650 $aTraça das Crucíferas
653 $aArtificial Phreromone
653 $aCultivo organico
653 $aDiamondback
653 $aFeromonio sinteitico
653 $aOrganic cultivation
653 $aPest insect
700 1 $aCAMPOS, T. B. de
700 1 $aRODRIGUES NETO, S. M.
700 1 $aBERGMANN, E. C.
773 $tArquivos do Instituto Biologico, Sao Paulo$gv.66, p.109, 1999.
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Registro original: |
Embrapa Hortaliças (CNPH) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
22/12/1999 |
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Data da última atualização: |
22/12/1999 |
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Autoria: |
SPOSITO, G.; MARTIN-NETO, L.; YANG, A. |
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Afiliação: |
University of California, Berkeley; EMBRAPA-CNPDIA. |
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Título: |
Mechanisms of atrazine reactions with humic acid. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
In: AMERICAN GEOPHYSICAL UNION MEETING, Dec. 1996, San Francisco, CA, Estados Unidos. Abstracts... San Francisco: American Geophysical Union, 1996. |
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Páginas: |
não paginado. |
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Idioma: |
Inglês |
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Conteúdo: |
Among the post-emergent herbicides, atrazine (6-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine-2,4-diamine) is the one most applied worldwide. It is also widely detected in water supplies, thus an important indicator of pesticide contamination, with growing public concern over its potential carcinogenic effects. The complexation pathways of atrazine with humic acid remain controversial, in part because of the absence of direct spectroscopic information. The basic question is whether proton-transfer and, to a lesser extent, hydrogen bonding are as important as electron-transfer in the mechanisms of reaction between atrazine and humic acid. Representative tropical and temperate-zone humic acids were reacted at pH<7 with 140 mmol mE-3 atrazine solution under exclusion of light. Infrared and electron spin resonance spectra of the resulting products gave evidence for proton-transfer and, under certain conditions, electron-transfer reactions. These spectroscopic data and those from other published studies were analyzed in terms of the molecular properties of humic acids and s-triazines, out of which emerged a guiding principle to characterize the complexation mechanisms of s-triazines with humic acid: proton-transfer is favored (and electron-transfer is disfavored) for humic acids of high acidic functional group content and for s-triazines of low basicity. Electron-transfer mechanisms are favored for humic acids of low acidic functional group content and for s-triazines of high basicity... MenosAmong the post-emergent herbicides, atrazine (6-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine-2,4-diamine) is the one most applied worldwide. It is also widely detected in water supplies, thus an important indicator of pesticide contamination, with growing public concern over its potential carcinogenic effects. The complexation pathways of atrazine with humic acid remain controversial, in part because of the absence of direct spectroscopic information. The basic question is whether proton-transfer and, to a lesser extent, hydrogen bonding are as important as electron-transfer in the mechanisms of reaction between atrazine and humic acid. Representative tropical and temperate-zone humic acids were reacted at pH<7 with 140 mmol mE-3 atrazine solution under exclusion of light. Infrared and electron spin resonance spectra of the resulting products gave evidence for proton-transfer and, under certain conditions, electron-transfer reactions. These spectroscopic data and those from other published studies were analyzed in terms of the molecular properties of humic acids and s-triazines, out of which emerged a guiding principle to characterize the complexation mechanisms of s-triazines with humic acid: proton-transfer is favored (and electron-transfer is disfavored) for humic acids of high acidic functional group content and for s-triazines of low basicity. Electron-transfer mechanisms are favored for humic acids of low acidic functional group content and for s-triazines of high ... Mostrar Tudo |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02018naa a2200157 a 4500
001 1027066
005 1999-12-22
008 1996 bl --- 0-- u #d
100 1 $aSPOSITO, G.
245 $aMechanisms of atrazine reactions with humic acid.
260 $c1996
300 $anão paginado.
520 $aAmong the post-emergent herbicides, atrazine (6-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine-2,4-diamine) is the one most applied worldwide. It is also widely detected in water supplies, thus an important indicator of pesticide contamination, with growing public concern over its potential carcinogenic effects. The complexation pathways of atrazine with humic acid remain controversial, in part because of the absence of direct spectroscopic information. The basic question is whether proton-transfer and, to a lesser extent, hydrogen bonding are as important as electron-transfer in the mechanisms of reaction between atrazine and humic acid. Representative tropical and temperate-zone humic acids were reacted at pH<7 with 140 mmol mE-3 atrazine solution under exclusion of light. Infrared and electron spin resonance spectra of the resulting products gave evidence for proton-transfer and, under certain conditions, electron-transfer reactions. These spectroscopic data and those from other published studies were analyzed in terms of the molecular properties of humic acids and s-triazines, out of which emerged a guiding principle to characterize the complexation mechanisms of s-triazines with humic acid: proton-transfer is favored (and electron-transfer is disfavored) for humic acids of high acidic functional group content and for s-triazines of low basicity. Electron-transfer mechanisms are favored for humic acids of low acidic functional group content and for s-triazines of high basicity...
700 1 $aMARTIN-NETO, L.
700 1 $aYANG, A.
773 $tIn: AMERICAN GEOPHYSICAL UNION MEETING, Dec. 1996, San Francisco, CA, Estados Unidos. Abstracts... San Francisco: American Geophysical Union, 1996.
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Embrapa Instrumentação (CNPDIA) |
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