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All Journal Indonesian Journal of Chemistry
Fatchiyah Fatchiyah
Research Center of Smart Molecule of Natural Genetics Resource, Brawijaya University, Malang 65145, East Java, Indonesia; Department of Biology, Faculty of Mathematics and Natural Sciences, Brawijaya University, Jl. Veteran, Malang 65145, East Java,
Chemical Engineering, Chemistry & Bioengineering Chemistry

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Profiling of Phytochemical Compounds of East Java Red Rice Bran Has the High-Value Biological Activities as Antioxidant and Antidiabetic Yoravika Dwiwibangga; Anna Safitri; Fatchiyah Fatchiyah
Indonesian Journal of Chemistry Vol 22, No 5 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.73432

Abstract

The phytochemicals contained in rice bran, mainly flavonoid compounds, are predicted to have biological activity. Flavonoids are able to counteract the free radicals and degrade insulin resistance. The East Java Red Rice Bran samples, e.g., Mentik Wangi, Aek Sibundong, and Blambangan, were used in the study. Their phytochemical profiles, functional groups, antioxidant, and antidiabetic activities were investigated. The phytochemical analysis showed that the bran of Mentik Wangi, Aek Sibundong, and Blambangan contained flavonoid, triterpenoid, phenolic, tannin, and glycoside. Based on the FTIR, some functional groups were identified in three rice bran varieties, namely, the O-H stretching, C-H aliphatic, C-H sp3 stretching, C=C stretching aromatics, C=C stretching alkenes, CH2 and CH3 bonds rocking, C-H aromatic, CH-OH stretching alcohols, and C-O stretching ether or ester suggesting that rice brans are rich in phytochemical compounds. Through LC-HRMS analysis in positive ion mode, several types of flavonoids were confirmed. Pinocembrin was found in the three brands. The highest antioxidant and antidiabetic activity were observed in Blambangan rice bran with an IC50 value of 1.09 and 75.76 µg/mL, respectively. To conclude, the red rice bran phytochemical compounds exhibit potential biological activities as antioxidant and antidiabetic agents.
Co-Authors Safitri, Anna Yoravika Dwiwibangga