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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.; OLIVEIRA JUNIOR, O. N. |
Afiliação: |
EMBRAPA-CNPDIA; USP-IQSC; USP-IFSC. |
Título: |
Effect of pH on the adsorption kinetics of self-assembled films from doped poly(o-ethoxyaniline). |
Ano de publicação: |
1996 |
Fonte/Imprenta: |
In: INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC METALS, July-Aug. 1996, Snowbird, UT, Estados Unidos. Abstracts... Snowbird: Utah University, 1996. |
Páginas: |
p.356. |
Idioma: |
Inglês |
Notas: |
Ref.P3.102. |
Conteúdo: |
The adsorption process of alternated, yltra-thin films of carboxymethylcellulose and HCI-doped poly(o-ethoxyaniline) onto glass substrates by the self-assembly technique was studied by ultraviolet-visible spectroscopy. The kinetics of adsorption for the 1st, 2nd, 5th and 10th bilayers obeys a first order process for a polymer concentration of 10E-3 M, with characteristic times in the order of 100s, independently of the solution pH in the range 1 to 5. This result is in contrast with data obtained for higher polymer concentrations where adsorption comprised two stages: a fast, first order kinetics process (characteristic time of only 5s) followed by a much slower process. It was also observed that adsorption is faster and more effective for pH=1. This probably occurs because at lower pHs the polymer is more strongly doped which promotes an increase in the electrostatic attraction of the polymeric molecules to the substrate. |
Categoria do assunto: |
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Marc: |
LEADER 01580naa a2200181 a 4500 001 1027114 005 1999-12-22 008 1996 bl uuuu u00u1 u #d 100 1 $aMATTOSO, L. H. C. 245 $aEffect of pH on the adsorption kinetics of self-assembled films from doped poly(o-ethoxyaniline). 260 $c1996 300 $ap.356. 500 $aRef.P3.102. 520 $aThe adsorption process of alternated, yltra-thin films of carboxymethylcellulose and HCI-doped poly(o-ethoxyaniline) onto glass substrates by the self-assembly technique was studied by ultraviolet-visible spectroscopy. The kinetics of adsorption for the 1st, 2nd, 5th and 10th bilayers obeys a first order process for a polymer concentration of 10E-3 M, with characteristic times in the order of 100s, independently of the solution pH in the range 1 to 5. This result is in contrast with data obtained for higher polymer concentrations where adsorption comprised two stages: a fast, first order kinetics process (characteristic time of only 5s) followed by a much slower process. It was also observed that adsorption is faster and more effective for pH=1. This probably occurs because at lower pHs the polymer is more strongly doped which promotes an increase in the electrostatic attraction of the polymeric molecules to the substrate. 700 1 $aPATERNO, L. G. 700 1 $aCAMPANA, S. P. 700 1 $aOLIVEIRA JUNIOR, O. N. 773 $tIn: INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC METALS, July-Aug. 1996, Snowbird, UT, Estados Unidos. Abstracts... Snowbird: Utah University, 1996.
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Embrapa Instrumentação (CNPDIA) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
04/09/2023 |
Data da última atualização: |
28/11/2023 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
GARCIA, A. R.; BARRETO, A. N.; JACINTO, M. A. C.; BARIONI JUNIOR, W.; COSTA, L. N.; LUZI, F.; PEZZOPANE, J. R. M.; BERNARDI, A. C. de C.; PEREIRA, A. M. F. |
Afiliação: |
ALEXANDRE ROSSETTO GARCIA, CPPSE; A. N. BARRETO, Universidade Federal do Pará; MANUEL ANTONIO CHAGAS JACINTHO, CPPSE; WALDOMIRO BARIONI JUNIOR, CPPSE; L. N. COSTA, Università di Bologna; F. LUZI, Università degli Studi di Milano; JOSE RICARDO MACEDO PEZZOPANE, CPPSE; ALBERTO CARLOS DE CAMPOS BERNARDI, CPPSE; A. M. F. PEREIRA, Universidade de Évora. |
Título: |
Adaptive integumentary traits of cattle raised in a silvopastoral system in tropical region. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
In: ANNUAL MEETING OF THE EUROPEAN FEDERATION OF ANIMAL SCIENCE, 74., 2023, Lyon. Book of abstracts... Netherlands: Wageningen Academic Publishers, 2023. |
Páginas: |
p. 707. |
DOI: |
10.3920/978-90-8686-936-7 |
Idioma: |
Inglês |
Conteúdo: |
This work aimed to investigate whether the environment of afforested pastures or in a silvopastoral system (SPS) determines adaptive differences in the morphophysiological characteristics of the integument of beef cattle. |
Palavras-Chave: |
Effects of climate change; Evaporative thermolysis; ILPF; Integument of beef cattle; Morphophysiological characteristics; Silvopastoral system. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 01258nam a2200301 a 4500 001 2156364 005 2023-11-28 008 2023 bl uuuu u00u1 u #d 024 7 $a10.3920/978-90-8686-936-7$2DOI 100 1 $aGARCIA, A. R. 245 $aAdaptive integumentary traits of cattle raised in a silvopastoral system in tropical region.$h[electronic resource] 260 $aIn: ANNUAL MEETING OF THE EUROPEAN FEDERATION OF ANIMAL SCIENCE, 74., 2023, Lyon. Book of abstracts... Netherlands: Wageningen Academic Publishers$c2023 300 $ap. 707. 520 $aThis work aimed to investigate whether the environment of afforested pastures or in a silvopastoral system (SPS) determines adaptive differences in the morphophysiological characteristics of the integument of beef cattle. 653 $aEffects of climate change 653 $aEvaporative thermolysis 653 $aILPF 653 $aIntegument of beef cattle 653 $aMorphophysiological characteristics 653 $aSilvopastoral system 700 1 $aBARRETO, A. N. 700 1 $aJACINTO, M. A. C. 700 1 $aBARIONI JUNIOR, W. 700 1 $aCOSTA, L. N. 700 1 $aLUZI, F. 700 1 $aPEZZOPANE, J. R. M. 700 1 $aBERNARDI, A. C. de C. 700 1 $aPEREIRA, A. M. F.
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