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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

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

MeSH

AntioxidantsBiphenyl CompoundsFree RadicalsIndicators and ReagentsOryzaPhenolsPicratesPlant ExtractsThailandThiocyanates

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 -