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Solid-state fermentation of black rice bran with Aspergillus awamori and Aspergillus oryzae: Effects on phenolic acid composition and antioxidant activity of bran extracts

Authors
Shin, Hye-YoungKim, Sung-MinLee, Ju HunLim, Seung-Taik
Issue Date
30-1월-2019
Publisher
ELSEVIER SCI LTD
Keywords
Black rice bran; Phenolic acid; Aspergillus fungi; Solid-state fermentation; Antioxidant activity
Citation
FOOD CHEMISTRY, v.272, pp.235 - 241
Indexed
SCIE
SCOPUS
Journal Title
FOOD CHEMISTRY
Volume
272
Start Page
235
End Page
241
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/68230
DOI
10.1016/j.foodchem.2018.07.174
ISSN
0308-8146
Abstract
Black rice bran (BRB) was fermented in solid state using Aspergillus awamori and Aspergillus oryzae for 5 days at 30 degrees C, and then the alcoholic extracts of the fermented BRB were examined in terms of phenolic acid composition and antioxidant activity (DPPH radical scavenging and tyrosinase inhibitory activity). A pre-treatment, moisturizing and autoclaving prior to the fermentation, decreased total phenolic content (TPC) by decomposing the anthocyanin in BRB, but the fermentation increased TPC. Protocatechuic acid and ferulic acid showed the most significant increases, reaching their maximum values by the fermentation for 3 days: 1660.6 mu g/g for the extract of BRB fermented by A. awamori. The radical scavenging activity and tyrosinase inhibitory activity of the alcoholic extracts increased by the pre-treatment and fermentation, in accordance with the increase in phenolic acid content. The solid-state fermentation was an effective process to raise the phenolic acid content and antioxidant activity of the extract.
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