|
|
Registros recuperados : 189 | |
42. | | CARMO, M. O. do; CARVALHO, J. E. B. de. Uso da alelopatia como método de controle de plantas infestantes na cultura dos citros em substituição a herbicidas. In: ZAMBOLIM, L.; NASSER, L. C. B.; ANDRIGUETO, J. R.; TEIXEIRA, J. M.; FACHINELLO, J. C. (Org.). Produção integrada no Brasil. Brasília, DF: CNPq; Viçosa, MG: Universidade Federal de Viçosa, 2008. Biblioteca(s): Embrapa Mandioca e Fruticultura. |
| |
56. | | SOUZA, L. da S.; BORGES, A. L.; SOUZA, L. D.; CARVALHO, J. E. B. de. Manejo e conservação do solo. In: BORGES, A. L.; SOUZA, L. da S.; (Ed.). Recomendações de calagem e adubação para abacaxi, acerola, banana, laranja, tangerina, lima ácida, mamão, mandioca, manga e maracujá. Cruz das Almas: Embrapa Mandioca e Fruticultura Tropical, 2009. p. 11-21. Biblioteca(s): Embrapa Mandioca e Fruticultura. |
| |
Registros recuperados : 189 | |
|
|
| 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: |
25/11/1999 |
Data da última atualização: |
05/01/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - A |
Autoria: |
FERREIRA, E. C.; NOGUEIRA, A. R. de A. |
Afiliação: |
EDILENE C. FERREIRA, UFSCAR; ANA RITA DE ARAUJO NOGUEIRA, CPPSE. |
Título: |
Vanillin-condensed tannin study using flow injection spectrophotometry. |
Ano de publicação: |
2000 |
Fonte/Imprenta: |
Talanta, v.51, p.1-6, 2000. |
Idioma: |
Inglês |
Conteúdo: |
Studies involving the kinetic reaction between vanillin and condensed tannins were developed using a flow injection system with spectrophotometric determination. A solution of the monomeric compound (-)-epicatechin was used as the analytical standard. This compound was chosen due to its structure, which is similar to a polymeric unit of the condensed tannin present in plants. The results indicated that the vanillin - condensed tannin reaction is time dependent and affected by the degree of polymerization of the condensed tannin. The flow system allowed ( - )-epicatechin to be used without overestimating the content of the tannin present in the forage legume, guandu (Cajanus cajan (L.) Millsp.), studied. A relative standard deviation (R.S.D.) of < 1% was found for a 4 h period work and allowed the determination of about 60 samples h ' with a detection limit of 1.05 mg I ' for condensed tannin. When compared to the manual vanillin procedure, the proposed approach can be used with various advantages. |
Palavras-Chave: |
Flow injection; Guandu seeds; Spectrophotometry; Tannin. |
Categoria do assunto: |
W Química e Física |
Marc: |
LEADER 01516naa a2200181 a 4500 001 1044611 005 2022-01-05 008 2000 bl uuuu u00u1 u #d 100 1 $aFERREIRA, E. C. 245 $aVanillin-condensed tannin study using flow injection spectrophotometry.$h[electronic resource] 260 $c2000 520 $aStudies involving the kinetic reaction between vanillin and condensed tannins were developed using a flow injection system with spectrophotometric determination. A solution of the monomeric compound (-)-epicatechin was used as the analytical standard. This compound was chosen due to its structure, which is similar to a polymeric unit of the condensed tannin present in plants. The results indicated that the vanillin - condensed tannin reaction is time dependent and affected by the degree of polymerization of the condensed tannin. The flow system allowed ( - )-epicatechin to be used without overestimating the content of the tannin present in the forage legume, guandu (Cajanus cajan (L.) Millsp.), studied. A relative standard deviation (R.S.D.) of < 1% was found for a 4 h period work and allowed the determination of about 60 samples h ' with a detection limit of 1.05 mg I ' for condensed tannin. When compared to the manual vanillin procedure, the proposed approach can be used with various advantages. 653 $aFlow injection 653 $aGuandu seeds 653 $aSpectrophotometry 653 $aTannin 700 1 $aNOGUEIRA, A. R. de A. 773 $tTalanta$gv.51, p.1-6, 2000.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Nenhum registro encontrado para a expressão de busca informada. |
|
|