Background & Aim:Caryopteris odorata is an aromatic shrub of family verbenaceae growing in tropical to subtropical regions. Various traditional applications of this plant have been documented guiding us to investigate the pharmacological activities and to further investigate the chemical composition. Experimental: Methanolic extract of aerial par...

The in vitro antioxidant activities of eight 3-carboxycoumarin derivatives were assayed by the quantitative 1,1-diphenyl-2-picrylhydrazil (DPPH•) radical scavenging activity method. 3-Acetyl-6-hydroxy-2H-1-benzopyran-2-one (C1) and ethyl 6-hydroxy-2-oxo-2H-1-benzopyran-3-carboxylate (C2) presented the best radical-scavenging activity. A quantitative structure-activity relationship (QSAR) study ...

Chlorophyll was extracted from pine needles, and then sodium zinc chlorophyllin (SZC) and sodium iron chlorophyllin (SIC) were synthesised by saponification, purification and substitution reaction, using sodium copper chlorophyllin (SCC) as a control. Their crystalline structures were verified by atomic absorbance spectroscopy, UV-VIS spectroscopy and HPLC. Moreover, their antioxidant activitie...

Tribulus terrestris L. and Solanum nigrum has been used traditionally since ages. To explore the phytoconstituents (qualitatively quantitatively) estimate antioxidant activity of hydroalcoholic ethyl acetate extracts fruits nigrum. Different methods were adopted for phytochemical screening. Evaluation potential was achieved by total anti-oxidant capacity assay, hydrogen peroxide scavenging acti...

Lamiaceae herbs known for their culinary properties are a rich source of potentially health-beneficial antioxidant polyphenols. The objective of this investigation was to evaluate and prove the in vitro antioxidant activity of five different extracts of aerial parts of the plant Leucas aspera, belonging to the family Lamiaceae on different models namely the DPPH free radical scavenging assay, F...


 The current study was carried out for comparative estimation of phytochemicals, anti-radical properties and half maximal inhibitory concentration (IC50) seven species family Moraceae using 2, 2-Diphenyl-1-Picrylhydrazyl assay. Methanolic (70%) extraction crude leaves extracts done via Double Maceration technique. Quantitative assay determining the radical scavenging activity DPPH as well...

MARINOVA, G. and V. BATCHVAROV, 2011. Evaluation of the methods for determination of the free radical scavenging activity by DPPH. Bulg. J. Agric. Sci., 17: 11-24 The survey of the methods for determination of free radical scavenging activity by DPPH has been done. The differences between methods conditions and their evaluation are presented. It was determined the effect of methods conditions b...

Thirteen polyphenolics were isolated from fresh pods of Caesalpinia pulcherrima using various methods of column chromatography. The structures of these polyphenolics were elucidated as gallic acid (1), methyl gallate (2), 6-O-galloyl-d-glucoside (3), methyl 6-O-galloyl-β-d-glucoside (4), methyl 3,6-di-O-galloyl-α-d-glucopyranoside (5), gentisic acid 5-O-α-d-(6'-O-galloyl)glucopyranoside (6), gu...

Moringa oleifera leaves extracted with methanol and dichloromethane were screened for antioxidant activity. The in vitro cancer antiproliferative and chemopreventive properties were also investigated. Radical scavenging assays with 1, 1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2 ́-azino-bis 3ethylbenzothiazoline-6-sulfonic acid (ABTS) were used to determine the antioxidant activity. The antiprolif...

Grewia tenax (Forssk.) Fiori (Malvaceae) grows in the Arabian Peninsula and is used for several medicinal purposes. To characterize dermatological bioactivities of G. tenaxin terms its antimelanoma, antityrosinase antioxidant activities. Cytotoxicity was assessed by cell proliferation mitochondrial viability assays. Ability to inhibit mushroom tyrosinase scavenge free radicals were evaluated an...