Solvent effects on the antioxidant capacity of lipophilic and hydrophilic antioxidants measured by CUPRAC, ABTS/persulphate and FRAP methods

Antibacterial activities, antioxidant contents and antioxidant properties of three traditional Chinese medicinal extracts

“…Therefore, it is desirable to establish a method that can measure the total anti-oxidant capacity level directly from plant extracts. CUPRAC method is a versatile, simple and low-cost anti-oxidant capacity assay for dietary polyphenols, vitamins C and E (Apak et al, 2008;Celik et al, 2010). In present work, S. baicalensis and S. oleraceus provided the higher CUPRAC value than C. chinensis, this tread was very similar with the result of TPC, while the TFC result of S. baicalensis was inconformity.…”

“…The cupric reducing anti-oxidant capacity (CUPRAC) assay, a method for determination of total anti-oxidant capacity, was applied with some modifications (Celik et al, 2010). Sample mixture was performed by mixing 1 mL CuCl2 (10 mM), 1 mL neocuproine solution (7.5 mM in 96% ethanol (v:v) and 1 mL NH4Ac buffer (1.0 M, pH = 7.0) in a test tube.…”

Antioxidant Capacity of Anthocyanin Pigments

“…Alternatively, antioxidant activity can be evaluated by measuring the immunological response to antigens (the products of lipidic oxidation). Though solvent effect is a vital parameter [203] exerting an influence on the chemical behaviour of antioxidant compounds, the information concerning about its role on the antioxidant capacity is relatively scarce.…”

“…Direct measurement of the total antioxidant capacity of foods: the 'QUENCHER' approach [184] Flow injection-based methods for fast screening of antioxidant capacity [185] Flow injection-based systems for determination of scavenging capacity against biologically relevant reactive species of oxygen and nitrogen [186] Antioxidant assays for plant and food components [187] Oxygen radical antioxidant capacity and trolox equivalent antioxidant capacity assays comparison to estimate the total antioxidant capacity of food products [188] How to standardize the multiplicity of methods to evaluate natural antioxidants [189] The use of total antioxidant capacity, total antioxidant capacity test, as a biomarker of disease in biochemistry, medicine, food and nutritional sciences [190] Critical review of the most commonly used methods for in vitro determination of antioxidant capacity [191] Updated methodology to determine antioxidant capacity in plant foods, oils and beverages [192] Methods to measure the antioxidant defence system [193] Popular methods commonly used for testing antioxidant activity in vitro: reliability, efficiency, accessibility and biological relevance [194] Methods for measuring antioxidant activity and assays for measuring overall reducing capacity [195] Model systems of the evaluation of antioxidants in three types of foods: bulk oil, oil-in-water emulsions, and muscle foods [196] The multifaceted aspects of antioxidants and the basic kinetic models of inhibited autoxidation [197] Application of various chemical methods to determine antioxidant activity in fruit pulp [198] Overview of cell culture models for antioxidant research [199] Standardized methods for the determination of antioxidant capacity and phenolics in foods and dietary supplements [200] Review of methods to determine chain-breaking antioxidant activity in food [201] Methods of measuring antioxidant activity particularly as they relate to lipid oxidation [202] Methods used to evaluate the free radical scavenging activity in foods and biological systems [203] Methodologies for evaluation of total antioxidant activities in complex mixtures [204] FR can be generated by various chromogenic compounds, such as azo ABTS (2,2′-azino-bis(3-ethylbenzthiazoline)-6-sulphonic acid), DMPD (N,N-dimethyl-p-phenylenediamine dihydro-chloride), DPPH (2,2-diphenyl-1-picrylhydrazyl), FRAP (ferric reducing ability of plasma) and DMPO (5,5-dimethyl-1-pyrroline N-oxide). Inhibition of oxidation can be...…”

Total Phenolic Contents and Free Radical Scavenging Activity of Different Parts of Jatropha Species

“…Generally, two modes of actions such as single electron transfer and hydrogen atom transfer have been used [27,28]. Therefore, in this research, the antioxidant activities of leaves of different cultivars were analyzed by two most common in vitro assays namely DPPH and ABTS and their results were expressed by different ways such as percentage of inhibition (%) and Trolox equivalent antioxidant capacity (mg TE/g DP).…”