Aspergillus oryzae fermented rice bran: a byproduct with enhanced bioactive compounds and antioxidant potential

Punia, S., Sandhu, K. S., Grasso, S. ORCID: https://orcid.org/0000-0001-6089-864X, Singh Purewal, S., Kaur, M., Kumar Siroha, A., Kumar, K., Kumar, V. and Kumar, M. (2020) Aspergillus oryzae fermented rice bran: a byproduct with enhanced bioactive compounds and antioxidant potential. Foods, 10 (1). 70. ISSN 2304-8158 doi: 10.3390/foods10010070

Abstract/Summary

Rice bran (RB) is a byproduct of the rice industry (milling). For the fermentation process and to add value to it, RB was sprayed with fungal spores (Aspergillus oryzae MTCC 3107). The impact of fermentation duration on antioxidant properties was studied. Total phenolic content (TPC) determined using the Folin–Ciocalteu method, increased during fermentation until the 4th day. The antioxidant activity analyzed using the 2,2 Diphenyl–1′ picrylhydrazyl (DPPH) assay, total antioxidant activity (TAC), 2,2′-azinobis 3-ethylbenzothiazoline-6-sulfonic acid (ABTS+) assay, reducing power assay (RPA) and hydroxyl free radical scavenging activity (HFRSA) for fermented rice bran (FRB) were determined and compared to unfermented rice bran (URB). TAC, DPPH, ABTS+ and RPA of FRB increased till 4th day of fermentation, and then decreased. The specific bioactive constituents in extracts (Ethanol 50%) from FRB and URB were identified using high performance liquid chromatography (HPLC). HPLC confirmed a significant (p < 0.05) increase in gallic acid and ascorbic acid. On the 4th day of fermentation, the concentrations of gallic acid and ascorbic acid were 23.3 and 12.7 µg/g, respectively. The outcome of present investigation confirms that antioxidant potential and TPC of rice bran may be augmented using SSF.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/95290
Item Type	Article
Refereed	Yes
Divisions	Interdisciplinary Research Centres (IDRCs) > Institute for Food, Nutrition and Health (IFNH)
Publisher	MDPI
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