Defining a standardized methodology for the determination of the antioxidant capacity: case study of Pistacia atlantica leaves

Abstract

Antioxidant activity can be measured by a variety of methods, that include hydrogen atom transfer (HAT) and single electron transfer (ET) methods.

Study of the antioxidant activity of Pistacia atlantica Desf. Gall extracts and evaluation of the responsible compounds

“…Finally, standard normal variate (SNV) transformation, used to remove slope variation, was also examined. SNV transforms the data by performing row centering, followed by row scaling, that is, dividing each row by its corresponding standard deviation (Ben Ahmed et al, 2020b).…”

“…However, the analytical methods that allow the evaluation of the antioxidant capacity in a given sample act differently, taking into consideration that the natural antioxidants act by different mechanisms and even the same compound can have different ways of action (Chohra et al, 2020;Mandade et al, 2011). In this regard, no single assay can provide an accurate measurement because it does not reflect the complexity of the potential interactions of the antioxidants (Ben Ahmed et al, 2020b). Thus, the evaluation of the overall antioxidant capacity requires multiple assays in order to generate a representative antioxidant profile.…”

“…The present study used three assays, i.e. the 2,2 diphenyl-1-picrylhydrazyl (DPPH) assay, the 2,2 azino-bis-(3-ethylbenzothiazoline-6sulfonic acid) (ABTS) and ferric reducing antioxidant power (FRAP), representing the main methods to measure the antioxidant properties (Ben Ahmed et al, 2020b). Important compounds, contributing to the antioxidant properties were indicated on the UPLC fingerprints applying a linear multivariate calibration technique, Partial Least Squares regression (PLS).…”

Identification of potential anti‐Alzheimer agents from Pistacia atlantica Desf. galls using UPLC fingerprinting, chemometrics, and molecular docking analyses

“…The leave‐one‐out cross‐validation (CV) method (LOO‐CV) was applied to calibrate the PLS model built with an optimal number of latent variables (LVs) based on the minimum value of the root‐mean‐square error of cross‐validation (RMSECV) (Ben Ahmed et al, 2020; Deng et al, 2015; Goodarzi et al, 2015; Li et al, 2021).…”

Four Pistacia atlantica subspecies (atlantica, cabulica, kurdica and mutica): A review of their botany, ethnobotany, phytochemistry and pharmacology

“…Many plant-based antioxidants have been identified as freeradical scavengers (Lobo et al, 2010). P. atlantica subspecies are known as an excellent source of natural antioxidants which contribute to the daily diet (Ben Ahmed et al, 2016;Ben Ahmed et al, 2020). Many studies have evaluated the antioxidant potential of different extracts from P. atlantica.…”