Comparison of DPPH Free Radical Scavenging, Ferric Reducing Antioxidant Power (FRAP), and Total Phenolic Content of Two Meriania Species (Melastomataceae)

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

Searching for new antioxidants used in pharmaceuticals, cosmetics or agrochemicals have increased today. Many phenolic compounds have been reported as promising for this goal. Melastomataceae is rich in these compounds. Consequently, in this research the antioxidant power for Meriania nobilis and M. hernandoi ( Melastomataceae) was compared. Both species were extracted in acetone 70%. The latest was liquid-liquid partitioned in ethyl acetate (Mn or Mh 2.1), n-butanol (Mn or Mh 2.2) and aqueous fractions (Mn or Mh 2.3). Antioxidant activity was measured by DPPH free radical scavenging method (FRS50, mg.L-1), ferric reducing antioxidant power assay (FRAP, mg FeS04.7H20 (100 g)-1ES) and total phenolic content (TPC, mg AG g-1ES) by Folin-Ciocalteu. The present study revealed that Mh 2.1 and Mh 2.2 from M. hernandoi have a strong antioxidant power FRS50 = 5.71±0.085, FRAP = 53±1.5 and TPC = 224±7.1 and FRS50 = 4.22±0.001, FRAP = 65 mg±1.5, TPC = 240 ±8.6 respectively, as compared with positive control, quercetin DPPH FRS50 = 4.20±0.410, FRAP = 61±1.3. M. nobilis exhibited poor antioxidant power FRS50 = 286±1.5, FRAP = 2.01±0.079 and TPC = 26±1.5. This paper showed M. hernandoi as good source of antioxidant compounds with potential usage as cosmetic, pharmaceutical or agrochemical ingredients

Related collections

Most cited references 15

Record: found
Abstract: found
Article: found

Is Open Access

Structural Features and Biological Properties of Ellagitannins in Some Plant Families of the Order Myrtales

Takashi Yoshida, Yoshiaki Amakura, Morio Yoshimura (2010)

Plant tannins, including hydrolysable and condensed varieties, are well known antioxidants in medicinal plants, foods, and edible fruits. Their diverse biological properties and potential for disease prevention have been demonstrated by various in vitro and in vivo assays. A number of ellagitannins, the largest group of hydrolysable tannins, have been isolated from dicotyledoneous angiosperms and characterized. This diverse class of tannins is sub-grouped into simple ellagitannins, C-glycosidic ellagitannins, complex tannins (condensates of C-glycosidic tannins with flavan-3-ol), and oligomers up to pentamers. This review outlines and describes the chemotaxonomic significance of structural features in various types of ellagitannins found in plants belonging to the Myrtaceae, Onagraceae, and Melastomataceae families, which are all included in the order Myrtales. Any biological activities that have been reported, including antitumor and antibacterial effects as well as enzyme inhibition, are also reviewed.