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Enhancement of the antioxidant capacity of soymilk by fermentation with Lactobacillus rhamnosus
被引:167
作者:
Marazza, Jose A.
[1
]
Nazareno, Monica A.
[2
]
Savoy de Giori, Graciela
[1
,3
]
Garro, Marisa S.
[1
]
机构:
[1] Ctr Referencia Lactobacilos CERELA CONICET, San Miguel De Tucuman, Argentina
[2] UNSE, Fac Agron & Agroind, Inst Ciencias Quim, INQUINOA CONICET, Santiago Del Estero, Argentina
[3] UNT, Fac Bioquim Quim & Farm, Catedra Microbiol Super, San Miguel De Tucuman, Argentina
关键词:
Soymilk;
Lactic acid bacteria;
Isoflavones;
DNA oxidation;
beta-Carotene bleaching;
DPPH radical;
LACTIC-ACID BACTERIA;
ISOFLAVONE PHYTOESTROGENS;
BETA-GLUCOSIDASE;
HYDROLYSIS;
BEVERAGES;
D O I:
10.1016/j.jff.2012.03.005
中图分类号:
TS2 [食品工业];
学科分类号:
0832 ;
摘要:
In order to enhance the bioactivity of soy beverages, fermentation of soymilk was assayed using Lactobacillus rhamnosus CRL981 as a beta-glucosidase producer. The biological activity of the fermented soy beverage enriched in isoflavone aglycones was determined by several methods to evaluate different antioxidant mechanisms. Fermented soymilk exhibited higher antioxidant activity (71.2 +/- 4.0%) determined by beta-carotene bleaching method but lower, although significant, DPPH radical scavenging effect (29.5 +/- 0.9%) than the unfermented soymilk used as control. The fermented soymilk extracts were able to inhibit the oxidation of DNA induced by Fenton's reagent. The increase of isoflavone aglycone contents during fermentation was a result of beta-glucosidase activity towards isoflavone glucosides. This process allowed obtaining a soy beverage with enhanced antioxidant capacity able to contribute to the health and nutritional status improvement of consumers. (c) 2012 Elsevier Ltd. All rights reserved.
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页码:594 / 601
页数:8
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