The antioxidant potential of the 99% methanolic extract of leaves of Muntingia calabura was assessed by using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and total phenolic content was measured by Folin-Ciocalteau (FC) by Singleton and Rossi using Gallic acid and Tannic acid as the calibration standard. Moreover Muntingia calabura leaf extract showed strong reducing power and significant antioxidant a...

Column chromatography of the Egyptian date palm pollen, resulted in the isolation of estradiol, estrone among ten compounds from the hexane fraction. Also, besides rutin, additional four flavonoids from the ethyl acetate extract were isolated. HPLC analysis of the hexane fraction (using RFBDS C18 – isocratic acetonitrile /water 58:42) revealed the presence of estrone, estradiol and estriol comp...

Phytochemicals profiling is important for the isolation of new and novel chemical substances. The current finding is directed to the detection of different classes of chemical constituents responsible for antioxidant properties of Euphorbia prostrate.The crude methanolic extract and various solvent isolated fractions of E. prostrate showed the presence of Alkaloids, Terpenoids, Saponins, Tannin...

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...

extracts of cotoneaster medicus, glycyrrhiza glabra, as endemic plants of iran, along with mixture of them were investigated for their antioxidant activities using 2, 2- diphenyl-1-picrylhidrazyl (dpph) reagent. uv-vis spectrophotometry method was used to evaluate the ability of cotoneaster and glycyrrhiza glabra antioxidant to scavenge dpph radical. the kinetic parameters such as rate constant...

the green synthesis of metallic nanoparticles is an active research area in nanotechnology. in the present study, antioxidant potential, total reducing capacity and silver nanoparticles (ag nps) synthetic potential of methanolic leaf extracts of seven plant species were evaluated and compared. antioxidant capacity, expressed as µmol trolox equivalents g-1 dw (µmol te g-1 dw), ranged from 116.0 ...

objective: boerhaavia elegans l. (nyctaginaceae) is a medicinal plant used for the treatment of kidney disorders, urinary tract disorders and blood purification in baluch tribe. the aim of present study is to evaluate the antioxidant propertyof b. elegans species for the first time. materials and methods: different parts (leaf, stem and fruit) of the plant were extracted by using various solven...