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Registro Completo |
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
22/12/1999 |
Data da última atualização: |
22/12/1999 |
Autoria: |
MATTOSO, L. H. C.; PATERNO, L. G.; CAMPANA, S. P.; CURVELO, A. A. S.; RAPOSO, M.; ZUCOLOTTO, V.; CASTRO, M. V. B.; FERREIRA, M.; OLIVEIRA JUNIOR, O. N. |
Afiliação: |
EMBRAPA-CNPDIA; USP-IQSC; USP-IFSC. |
Título: |
Filmes condutores produzidos por auto-montagem. |
Ano de publicação: |
1995 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE POLIMEROS, 3., nov. 1995, Rio de Janeiro, RJ. Anais... Rio de Janeiro: Associacao Brasileira de Polimeros, 1995. |
Páginas: |
p.1259-1262. |
Idioma: |
Português |
Conteúdo: |
The self-assembly (SA) technique has been applied to fabricate ultra-thin films of poly(o-alkoxyanilines) with polyacids. Films were produced from alternated layers of doped poly(o-methoxyaniline) and poly(o-ethoxyaniline) as polycations, and poly(styrene sulfonic acid), poly(vinyl sulfonic acid), carboxymethylcellulose and sulfonated lignin as polyanions. The build-up of the multilayer structure was monitored by UV-Vis spectroscopy which showed that the absorbance increases linearly with the number of deposited bilayers for all systems. Conducting self-assembled films could be deposited on glass, as wells as on conventional polymer films. |
Palavras-Chave: |
Automontagem; Filmes condutores; Polimeros; Polymer; SA; Self-assembly technique; Ultra-thin films. |
Thesagro: |
Produção. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01577naa a2200325 a 4500 001 1026934 005 1999-12-22 008 1995 bl uuuu u00u1 u #d 100 1 $aMATTOSO, L. H. C. 245 $aFilmes condutores produzidos por auto-montagem. 260 $c1995 300 $ap.1259-1262. 520 $aThe self-assembly (SA) technique has been applied to fabricate ultra-thin films of poly(o-alkoxyanilines) with polyacids. Films were produced from alternated layers of doped poly(o-methoxyaniline) and poly(o-ethoxyaniline) as polycations, and poly(styrene sulfonic acid), poly(vinyl sulfonic acid), carboxymethylcellulose and sulfonated lignin as polyanions. The build-up of the multilayer structure was monitored by UV-Vis spectroscopy which showed that the absorbance increases linearly with the number of deposited bilayers for all systems. Conducting self-assembled films could be deposited on glass, as wells as on conventional polymer films. 650 $aProdução 653 $aAutomontagem 653 $aFilmes condutores 653 $aPolimeros 653 $aPolymer 653 $aSA 653 $aSelf-assembly technique 653 $aUltra-thin films 700 1 $aPATERNO, L. G. 700 1 $aCAMPANA, S. P. 700 1 $aCURVELO, A. A. S. 700 1 $aRAPOSO, M. 700 1 $aZUCOLOTTO, V. 700 1 $aCASTRO, M. V. B. 700 1 $aFERREIRA, M. 700 1 $aOLIVEIRA JUNIOR, O. N. 773 $tIn: CONGRESSO BRASILEIRO DE POLIMEROS, 3., nov. 1995, Rio de Janeiro, RJ. Anais... Rio de Janeiro: Associacao Brasileira de Polimeros, 1995.
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Embrapa Instrumentação (CNPDIA) |
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Registro Completo
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
22/08/2016 |
Data da última atualização: |
05/01/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
DOMÍNGUEZ, A.; BROWN, G. G.; SAUTTER, K. D.; OLIVEIRA, C. M. R. de; VASCONCELOS, E. C. de; NIVA, C. C.; BARTZ, M. L. C.; BEDANO, J. C. |
Afiliação: |
ANAHÍ DOMÍNGUEZ, CONICET; GEORGE GARDNER BROWN, CNPF; KLAUS DIETER SAUTTER, UNIVERSIDADE POSITIVO; CINTIA MARA RIBAS DE OLIVEIRA, UNIVERSIDADE POSITIVO; ELIANE CARVALHO DE VASCONCELOS, UNIVERSIDADE POSITIVO; CINTIA CARLA NIVA, CPAC; MARIE LUISE CAROLINA BARTZ, UNIVERSIDADE POSITIVO; JOSÉ CAMILO BEDANO, CONICET. |
Título: |
Toxicity of AMPA to the earthworm Eisenia andrei Bouché, 1972 in tropical artificial soil. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Scientific reports, London, v. 6, January 2016. |
Páginas: |
8 p. |
Idioma: |
Inglês |
Conteúdo: |
Aminomethylphosphonic acid (AMPA) - one of glyphosate's main metabolites - has been classified as persistent in soils, raising concern regarding the widespread use of glyphosate in agriculture and forestry. Glyphosate may have negative or neutral effects on soil biota, but no information is available on the toxicity of AMPA to soil invertebrates. Therefore our aim was to study the effect of AMPA on mortality and reproduction of the earthworm species Eisenia andrei using standard soil ecotoxicologica I methods (ISO). Field-relevant concentrations of AMPA had no significant effects on mortality in acute or chronic assays. Except at the highest concentration tested, a significant biomass loss was observed compared to controls in the chronic assay. The number of juveniles and cocoons increased with higher concentrations of AMPA applied, but their mean weights decreased. This mass loss indicates higher sensitivity of juveniles than adults to AMPA. Our results suggest that earthworms coming from parents grown in contaminated soils may have reduced growth, limiting their beneficial roles in key soil ecosystem functions. Nevertheless, further research is needed to better understand the mechanisms underlying the sublethal effects observed here. |
Palavras-Chave: |
Aminomethylphosphonic Acid; Earthworm; Ecotoxicological Assessement; Foetida; Herbicide Glyphosate; Solo tropical artificial. |
Thesagro: |
Aminoácido; Herbicida; Minhoca; Recuperação do solo; Solo tropical. |
Thesaurus NAL: |
Aminomethylation; Biomass; Degradation; Dynamics; Ecotoxicology; Herbicides; Pesticides. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02421naa a2200433 a 4500 001 2051409 005 2017-01-05 008 2016 bl --- 0-- u #d 100 1 $aDOMÍNGUEZ, A. 245 $aToxicity of AMPA to the earthworm Eisenia andrei Bouché, 1972 in tropical artificial soil. 260 $c2016 300 $a8 p. 520 $aAminomethylphosphonic acid (AMPA) - one of glyphosate's main metabolites - has been classified as persistent in soils, raising concern regarding the widespread use of glyphosate in agriculture and forestry. Glyphosate may have negative or neutral effects on soil biota, but no information is available on the toxicity of AMPA to soil invertebrates. Therefore our aim was to study the effect of AMPA on mortality and reproduction of the earthworm species Eisenia andrei using standard soil ecotoxicologica I methods (ISO). Field-relevant concentrations of AMPA had no significant effects on mortality in acute or chronic assays. Except at the highest concentration tested, a significant biomass loss was observed compared to controls in the chronic assay. The number of juveniles and cocoons increased with higher concentrations of AMPA applied, but their mean weights decreased. This mass loss indicates higher sensitivity of juveniles than adults to AMPA. Our results suggest that earthworms coming from parents grown in contaminated soils may have reduced growth, limiting their beneficial roles in key soil ecosystem functions. Nevertheless, further research is needed to better understand the mechanisms underlying the sublethal effects observed here. 650 $aAminomethylation 650 $aBiomass 650 $aDegradation 650 $aDynamics 650 $aEcotoxicology 650 $aHerbicides 650 $aPesticides 650 $aAminoácido 650 $aHerbicida 650 $aMinhoca 650 $aRecuperação do solo 650 $aSolo tropical 653 $aAminomethylphosphonic Acid 653 $aEarthworm 653 $aEcotoxicological Assessement 653 $aFoetida 653 $aHerbicide Glyphosate 653 $aSolo tropical artificial 700 1 $aBROWN, G. G. 700 1 $aSAUTTER, K. D. 700 1 $aOLIVEIRA, C. M. R. de 700 1 $aVASCONCELOS, E. C. de 700 1 $aNIVA, C. C. 700 1 $aBARTZ, M. L. C. 700 1 $aBEDANO, J. C. 773 $tScientific reports, London$gv. 6, January 2016.
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