Antioxidant Activity and Spectroscopic Characteristics of Extractable and Non-Extractable Phenolics from Terminalia sericea Burch. ex DC

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
Chinedu AnokwuruNatasha Potgieter

Abstract

The aim of this study was to determine the antioxidant activity of the extractable and non-extractable phenolics of Terminalia. Sericea Burch. Ex DC. Free, ester bound, ether or glycoside bound and insoluble phenolics were extracted from the fruit, leaves, stem, and root samples. Follin Ciocalteu was used to estimate the phenolic content while DPPH (2,2-diphenyl-1-picrylhydrazyl) assay was used to determine the antioxidant activity. The data obtained were subjected to multivariate analysis for relationships. The result indicated that the highest average total phenolic contents and antioxidant activities were found in the free (14.8 mgGAE/g; IC50 6.8 μg/mL) and ester bound (15.1 mgGAE/g; IC50 6.4 μg/mL) extractable phenolics. There was a strong negative correlation between TPC and DPPH (r = -0.828). Agglomerative hierarchical clustering revealed three clusters. Cluster one contained the insoluble and glycoside phenolics while cluster 2 contained only free phenolic acid of the root. The third cluster was predominantly free and ester bound phenolic extracts. The principal component analysis score plot indicated two major clusters with factor 1 (F1) explaining 61% of the variation. The nuclear magnetic resonance spectroscopy spectr...Continue Reading

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Citations

Dec 14, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Andrea NemesJudit Remenyik
Jul 28, 2020·Journal of Food Biochemistry·Azzurra StefanucciAdriano Mollica
May 30, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Alessandra Durazzo, Massimo Lucarini
Oct 9, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Antonio Tornero-MartínezRosalva Mora-Escobedo
Nov 3, 2020·Frontiers in Pharmacology·Gitishree DasJayanta Kumar Patra
Feb 25, 2020·Journal of Agricultural and Food Chemistry·Zhenyu WangShaoling Lin

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Methods Mentioned

BETA
PCA
NMR

Software Mentioned

SPSS
XLSTAT
AVIII 400
Bruker Topspin

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