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Doctoral Thesis
DOI
10.11606/T.9.1993.tde-08042008-160829
Document
Author
Full name
Elizabete Wenzel de Menezes
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 1993
Supervisor
Committee
Lajolo, Franco Maria (President)
Campana, Álvaro Oscar
Curi, Rui
Sigulem, Dirce Maria
Vannucchi, Helio
Title in Portuguese
Aproveitamento do amido de alimentos estudados em humanos e animais
Keywords in Portuguese
Amido
Feijão
Glicemia
Abstract in Portuguese
Foram realizados ensaios de curta e média duração em animais e humanos visando avaliar o aproveitamento do amido do feijão em relação a outras fontes de carboidratos complexos, de consumo habitual da população brasileira. Em animais, o aumento da glicose plasmática decorrente da ingestão de diferentes fontes de amido decresceu na seguinte ordem: polenta= arroz= pão= macarrão> canjica = farinha de mandioca> mandioca = feijão Carioca = feijão Fradinho. Em humanos, o feijão com casca ou sem casca produziu menores respostas plasmáticas de glicose que a polenta, arroz, arroz com feijão; as respostas de insulina plasmática foram reduzidas para todas as dietas que continham feijão e tanto a polenta como o feijão estimularam de forma semelhante a liberação do GLP-1 7-36. Pudemos evidenciar a persistência do reduzido aproveitamento do amido do feijão, em relação ao da polenta, apesar da adaptação dos animais a essas fontes de carboidratos por 13 dias. Observamos por microscopia óptica e ensaios "in vivo" que a parede celular íntegra e a organização física entre os grânulos de amido e proteína podem explicar, em parte, o reduzido aproveitamento do amido do feijão.
Title in English
Utilization of starchy foods: study in humans and animals
Keywords in English
Bean
Glycemia
Starch
Abstract in English
Short- and midle-term assays in animais and humans were carried out to determine the utilization of bean starch as compared to usual Brazilian starchy foods. The order of glycemic response was: polenta = rice = bread = macaroni > hominy = cassava flour > cassava = Carioca bean = Fradinho bean. Beans with ar without seed coat produced in human a glycemic response lower than polenta, rice and rice plus bean; the insulin response was reduced for all diets containing beans; the secretion of glucagon-like peptide-1 7-36 was the same either for polenta ar bean diet. The reduced utilization of bean starch for polenta and bean diet was confirmed in midle-term assays (13 days). The optic microscopy and "in vivo" observations suggested that existence of whole cell walls and starch-protein associations may explain the lower blood response.
 
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Publishing Date
2008-04-08
 
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