| |
|
|
 | 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 |
|
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 |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Amapá. |
|
Data corrente: |
26/07/2019 |
|
Data da última atualização: |
18/11/2019 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 2 |
|
Autoria: |
SOUSA, B. O.; OLIVEIRA, M. S. B.; TAVARES-DIAS, M. |
|
Afiliação: |
BRIANI O. SOUSA, UNIFAP; MARCOS S. B. OLIVEIRA, UNIFAP. PPG em Biodiversidade Tropical; MARCOS TAVARES DIAS, CPAF-AP. |
|
Título: |
Community structure of metazoan parasites in Hemibrycon surinamensis (Characidae) from the Matapi River in the State of Amapá, Brazil. |
|
Ano de publicação: |
2019 |
|
Fonte/Imprenta: |
Anais da Academia Brasileira de Ciências, v. 91, n. 2, 2019. e20180393. |
|
DOI: |
10.1590/0001-3765201920180393 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The aim of this study was to investigate the community of metazoan parasites in Hemibrycon surinamensis from the Matapi River, State of Amapá, Brazil. Among the 31 examined fish, 77.4 % were parasitized by Jainus hexops, Tereancistrum ornatus (Monogenea), Contracaecum sp. (Nematoda), Clinostomus marginatum and Posthodiplostomum sp. (Digenea). However, the dominance was of monogeneans J. hexops and T. ornatus, and among the endoparasites, the predominance was of species at the larval stage. The parasites showed random dispersion. Brillouin diversity index varied from 0 to 0.9, evenness from 0 to 0.7 and species richness from 0 to 3 parasites per host. Low levels of parasitic infection were observed and discussed. The results indicate that this intermediate host occupies a low position in the food web. This is the third eco-epidemiological study for H. surinamensis. |
|
Palavras-Chave: |
Monogeneans. |
|
Thesagro: |
Parasito de Animal; Peixe de Água Doce. |
|
Thesaurus NAL: |
Ectoparasites; Freshwater fish; Species diversity. |
|
Categoria do assunto: |
S Ciências Biológicas |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/199911/1/CPAF-AP-2019-Community-structure-of-metazoan-parasites.pdf
|
|
Marc: |
LEADER 01644naa a2200229 a 4500
001 2110912
005 2019-11-18
008 2019 bl uuuu u00u1 u #d
024 7 $a10.1590/0001-3765201920180393$2DOI
100 1 $aSOUSA, B. O.
245 $aCommunity structure of metazoan parasites in Hemibrycon surinamensis (Characidae) from the Matapi River in the State of Amapá, Brazil.$h[electronic resource]
260 $c2019
520 $aThe aim of this study was to investigate the community of metazoan parasites in Hemibrycon surinamensis from the Matapi River, State of Amapá, Brazil. Among the 31 examined fish, 77.4 % were parasitized by Jainus hexops, Tereancistrum ornatus (Monogenea), Contracaecum sp. (Nematoda), Clinostomus marginatum and Posthodiplostomum sp. (Digenea). However, the dominance was of monogeneans J. hexops and T. ornatus, and among the endoparasites, the predominance was of species at the larval stage. The parasites showed random dispersion. Brillouin diversity index varied from 0 to 0.9, evenness from 0 to 0.7 and species richness from 0 to 3 parasites per host. Low levels of parasitic infection were observed and discussed. The results indicate that this intermediate host occupies a low position in the food web. This is the third eco-epidemiological study for H. surinamensis.
650 $aEctoparasites
650 $aFreshwater fish
650 $aSpecies diversity
650 $aParasito de Animal
650 $aPeixe de Água Doce
653 $aMonogeneans
700 1 $aOLIVEIRA, M. S. B.
700 1 $aTAVARES-DIAS, M.
773 $tAnais da Academia Brasileira de Ciências$gv. 91, n. 2, 2019. e20180393.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Amapá (CPAF-AP) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
