Effect of processing and storage time on in vitro digestibility and resistant starch content of two bean (Phaseolus vulgaris L) varieties

被引:54
作者
Osorio-Díaz, P
Bello-Pérez, LA
Sáyago-Ayerdi, SG
Benítez-Reyes, MDP
Tovar, J
Paredes-López, O
机构
[1] IPN, Ctr Desarrollo Prod Biot, Yautepec 62731, Morelos, Mexico
[2] Inst TEcnol Acapulco, Guerrero 39300, Mexico
[3] Cent Univ Venezuela, Fac Ciencias, Inst Expt Biol, Caracas 1041 A, Venezuela
[4] IPN, Ctr Invest & Estud Avanzados, Unidad Irapuato, Guanajuato 36500, Mexico
关键词
resistant starch; beans; starch hydrolysis; legumes; chemical composition;
D O I
10.1002/jsfa.1413
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
Seeds from two commercial bean varieties were cooked and stored for different times and analysed for chemical composition and in vitro starch digestibility. Parallel portions of cooked seeds were dried at 55 degreesC, milled and stored as flours. In general, protein and ash contents in both samples did not change with storage time, but statistical differences were shown between the two varieties (p < 0.05). Available starch (AS) contents in flours from the 'negro' variety did not change (p < 0.05) with storage time and, in general, were higher than in 'flor de mayo' samples, whose AS levels decreased during storage. The lower AS in 'flor de mayo' flour could be the consequence of formation of resistant starch due to retrogradation. Samples of whole 'negro' seeds did not show differences in AS content at 0, 24 and 48 h of storage compared with the corresponding flours, but at 72 and 96 h the AS increased in the whole samples. 'Flor de mayo' showed a similar pattern in flour and whole samples, with slightly higher values in the whole seeds. In general, total resistant starch (RS) content in the two varieties was higher in the flours than in 'whole' seeds, a fact that is not easy to explain at present. 'Negro' flour presented an RS content around 65.0 g kg(-1), and approximately 55.0 g kg(-1) was recorded in 'flor de mayo', with slight changes when storage time increased. Whole 'flor de mayo' showed significant levels of the retrograded portion of resistant starch (RRS), which did not change with storage time (p < 0.05). However, values were lower than in the flours. A pattern similar to that of the 'negro' variety was obtained for 'flor de mayo', since the flour exhibited higher amounts of RRS; however, in this variety, the RRS content in 'whole' samples decreased after prolonged storage. Flours presented higher amylolysis rates than whole samples, and the ease of digestion increased with storage time. (C) 2003 Society of Chemical Industry
引用
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页码:1283 / 1288
页数:6
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