Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 4
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Avaliação de compostos não-voláteis em diferentes cultivares de cafeeiro produzidas na região sul de Minas Gerais - DOI: 10.4025/actasciagron.v31i1.6629 Agronomy
Malta, Marcelo Ribeiro; EPAMIG; Chagas, Sílvio Júlio de Rezende; EPAMIG.
O presente trabalho teve como objetivo avaliar os teores de trigonelina, ácidos clorogênicos (5-ACQ) e cafeína em grãos de diferentes cultivares de cafeeiro (Coffea arabica L.). As cultivares avaliadas foram coletadas na Fazenda Experimental da Epamig em Lavras, Estado de Minas Gerais, no ano agrícola de 2005/2006. O delineamento experimental utilizado foi um inteiramente casualizado constando de oito cultivares de café com três repetições. Foram avaliadas as cultivares: Oeiras MG 6851, Acaiá Cerrado MG 1474, Catuaí Vermelho IAC 99, Rubi MG 1192, Topázio MG 1190, Mundo Novo IAC 379/19, Catucaí Amarelo 2 SL e Catuaí Amarelo IAC 62. Após a colheita dos cafés por derriça manual no pano, estes foram lavados e submetidos ao processo de descascamento e...
Palavras-chave: 5.01.03.04-0 Produção de Mudas Coffea arabic; Melhoramento; Composição química; Ácido clorogênico; Cafeína; Trigonelina. Coffea Arabica; Breeding; Chemical composition; Chlorogenic acids; Caffeine; Trigonelline.
Ano: 2009 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6629
Imagem não selecionada

Imprime registro no formato completo
Genetic investigations on the caffeine and chlorogenic acid relationship in an interspecific cross between Coffea liberica dewevrei and C-pseudozanguebariae ArchiMer
Ky, Chin-long; Barre, Philippe; Noirot, Michel.
The objective of the paper was to identify the number of major loci explaining caffeine content in coffee seeds. Investigations were based on previously published results: (1) Caffeine binds to chlorogenic acids in a 1:1 molecular ratio; (2) Between species, the caffeine content is correlated to the chlorogenic acid content; (3) Only a part of chlorogenic acids is bound to caffeine. Especially, the content ratio between caffeine and chlorogenic acids varied between species. For identifying the number of major loci, a quantitative trait locus (QTL) approach was carried out using an interspecific cross between two highly differentiated species-Coffea liberica dewevrei and Coffea pseudozanguebariae, the latter being a caffeine-free species. As main finding,...
Tipo: Text Palavras-chave: Coffea; Chlorogenic acids; Caffeine; QTL; Interspecific cross.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00152/26298/24429.pdf
Imagem não selecionada

Imprime registro no formato completo
On-line HPLC analysis of the antioxidant activity of phenolic compounds in brewed, paper-filtered coffee Braz. J. Plant Physiol.
Stalmach,Angélique; Mullen,William; Nagai,Chifumi; Crozier,Alan.
Caffeoyl-, feruloyl- and dicaffeoylquinic acids (chlorogenic acids) in infusions from green and medium roasted coffee beans were identified and quantified by reverse phase HPLC with photodiode array and MS³ detection prior to assessment of the antioxidant activity using an HPLC system with post-column on-line antioxidant detection based on 2,2'-azinobis-3-ethylbenzothiazoline-6-sulphonic acid radical scavenging activity. Caffeoylquinic acids were the most abundant antioxidants and roasting induced isomerisation with a decline in 5-O-caffeoylquinic acid and concomitant increases in the 3- and 4-O-derivatives. This did not affect the level of caffeoylquinic acid-derived antioxidant activity in the roasted coffee. Roasting did, however, result in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea; ABTS+; Chlorogenic acids; Hydroxycinnamates; HPLC-MSn.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100018
Imagem não selecionada

Imprime registro no formato completo
Phenolic compounds in coffee Braz. J. Plant Physiol.
Farah,Adriana; Donangelo,Carmen Marino.
Phenolic compounds are secondary metabolites generally involved in plant adaptation to environmental stress conditions. Chlorogenic acids (CGA) and related compounds are the main components of the phenolic fraction of green coffee beans, reaching levels up to 14 % (dry matter basis). These compounds have a number of beneficial health properties related to their potent antioxidant activity as well as hepatoprotective, hypoglycemic and antiviral activities. The main groups of CGA found in green coffee beans include caffeoylquinic acids, dicaffeoylquinic acids, feruloylquinic acids, p-coumaroylquinic acids and mixed diesters of caffeic and ferulic acids with quinic acid, each group with at least three isomers. During coffee processing, CGA may be isomerized,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea; Chlorogenic acids; Chlorogenic acid lactones; Coffee quality; Coffee processing; Coffee roasting; Quinides.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100003
Registros recuperados: 4
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional