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Study on total phenolic contents and their antioxidant activities of Thai white, red and black rice bran extracts.
Pak J Biol Sci. 2010 Feb 15; 13(4):170-4.PJ

Abstract

In this study, different brans of Thai rice cultivars which were divided into 3 groups: white color (Hom mali 105, Supan, Saohai, Hom chaiya and Hom jun), red color (3256, GS 18003, 21606, 21699 and 5718) and black color (96041-20, 96051-37, 96004-49, 96023-35 and 96065-42) were investigated their Total Phenolic Content (TPC) and antioxidant activities. The rice brans were firstly extracted using methanol. The extracts were analyzed using Folin-Ciocalteau method for total phenolic content while thiocyanate method and 1,1-diphenyl-2-picrylhydrasyl (DPPH) free radical-scavenging assay were used for antioxidant activities determination. The results indicated that the total phenolic content of white, red and black rice bran extract were in the range of 0.8931-0.9884, 1.0103-1.0494 and 1.0810-1.2239 mg gallic acid equivalent (GAE mg(-1)), respectively. With thiocyanate method, percentage inhibition were in the range of 10.15-20.68, 30.64-38.80 and 25.52-26.28 for white, red and black rice bran extract, respectively. With DPPH radical-scavenging assay, methanolic extract of 5718 showed the highest (IC50=0.0057 mg mL(-1)) while Homchaiya showed the lowest (IC50=0.2582 mg mL(-1)) activities. All of extracts showed lower activity than BHA (IC50=0.0012 mg mL(-1)). However, the antioxidant activity of all rice bran extracts indicated high antioxidant efficiency in the following order: red>black>white color rice brans. It is a promising that Thai rice bran are potential antioxidant sources.

Authors+Show Affiliations

The Center of Excellence for Innovation in Chemistry, Department of Chemistry, Faculty of Science, Mahasarakham University, Mahasarakham 44150, Thailand.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20437683

Citation

Muntana, N, and S Prasong. "Study On Total Phenolic Contents and Their Antioxidant Activities of Thai White, Red and Black Rice Bran Extracts." Pakistan Journal of Biological Sciences : PJBS, vol. 13, no. 4, 2010, pp. 170-4.
Muntana N, Prasong S. Study on total phenolic contents and their antioxidant activities of Thai white, red and black rice bran extracts. Pak J Biol Sci. 2010;13(4):170-4.
Muntana, N., & Prasong, S. (2010). Study on total phenolic contents and their antioxidant activities of Thai white, red and black rice bran extracts. Pakistan Journal of Biological Sciences : PJBS, 13(4), 170-4.
Muntana N, Prasong S. Study On Total Phenolic Contents and Their Antioxidant Activities of Thai White, Red and Black Rice Bran Extracts. Pak J Biol Sci. 2010 Feb 15;13(4):170-4. PubMed PMID: 20437683.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Study on total phenolic contents and their antioxidant activities of Thai white, red and black rice bran extracts. AU - Muntana,N, AU - Prasong,S, PY - 2010/5/5/entrez PY - 2010/5/5/pubmed PY - 2010/5/18/medline SP - 170 EP - 4 JF - Pakistan journal of biological sciences : PJBS JO - Pak. J. Biol. Sci. VL - 13 IS - 4 N2 - In this study, different brans of Thai rice cultivars which were divided into 3 groups: white color (Hom mali 105, Supan, Saohai, Hom chaiya and Hom jun), red color (3256, GS 18003, 21606, 21699 and 5718) and black color (96041-20, 96051-37, 96004-49, 96023-35 and 96065-42) were investigated their Total Phenolic Content (TPC) and antioxidant activities. The rice brans were firstly extracted using methanol. The extracts were analyzed using Folin-Ciocalteau method for total phenolic content while thiocyanate method and 1,1-diphenyl-2-picrylhydrasyl (DPPH) free radical-scavenging assay were used for antioxidant activities determination. The results indicated that the total phenolic content of white, red and black rice bran extract were in the range of 0.8931-0.9884, 1.0103-1.0494 and 1.0810-1.2239 mg gallic acid equivalent (GAE mg(-1)), respectively. With thiocyanate method, percentage inhibition were in the range of 10.15-20.68, 30.64-38.80 and 25.52-26.28 for white, red and black rice bran extract, respectively. With DPPH radical-scavenging assay, methanolic extract of 5718 showed the highest (IC50=0.0057 mg mL(-1)) while Homchaiya showed the lowest (IC50=0.2582 mg mL(-1)) activities. All of extracts showed lower activity than BHA (IC50=0.0012 mg mL(-1)). However, the antioxidant activity of all rice bran extracts indicated high antioxidant efficiency in the following order: red>black>white color rice brans. It is a promising that Thai rice bran are potential antioxidant sources. SN - 1028-8880 UR - https://www.unboundmedicine.com/medline/citation/20437683/Study_on_total_phenolic_contents_and_their_antioxidant_activities_of_Thai_white_red_and_black_rice_bran_extracts_ L2 - https://medlineplus.gov/antioxidants.html DB - PRIME DP - Unbound Medicine ER -