منابع مشابه
Viscosity and temperature dependence of the magnetic isotope effect
The 13C enrichment observed in the first order photolytic decomposition of dibenzylketone (1,3-diphenyl2-propanone) was studied as a function of solvent viscosity and temperature. The isotope effect is due to electron-nuclear hyperfine interactions in the free radical intermediates of the reaction. The results are explained using a continuum diffusion model and a simplified version of the radic...
متن کاملAntioxidant Activity and Analysis of Polyphenols from the Leaf Extracts of Calotropis Procera through Ultra Performance Liquid Chromatography
Antioxidant effects of the Petroleum ether extracts of the leaves of Calotrois procera were tested on the basis of scavenging activity of the free radical DPPH (1, 1-diphenyl2-picryl-hydrazyl), reducing power and inhibition of nitric oxide radical . The Petroleum Ether extracts of C .procera showed the highest antioxidant activity and the activity of the extract increased with increasing concen...
متن کاملPhenolic Constituents of Eucalyptus camaldulensis Dehnh, with Potential Antioxidant and Cytotoxic Activities
A liquid chromatography-diode array detection-electrospray ionization mass spectrometric (HPLC– PDA–ESI/MS/MS) method was used for separation and characterization of the phytoconstituents of the aqueous acetone leaf extract of Eucalyptus camaldulensis Dehnh (Myrtaceae). The employed method was optimized for separation, identification and quantification of fifty six compounds including ellagitan...
متن کاملAntioxidative Constituents from the Twigs of Vitex rotundifolia
In the course of screening for antioxidant compounds by measuring the radical scavenging effect on DPPH (1,1-diphenyl2-picrylhydrazyl), a total extract of the twigs of Vitex rotundifolia (Verbenaceae) was found to show potent antioxidant activity. Subsequent activity-guided fractionation of the methanolic extract led to the isolation of three iridoid compounds, 10-O-vanilloylaucubin (1), 10-O-p...
متن کاملBiological assessment on Cerbera manghas ( linn . )
In the present biological studies, several pharmacological investigations were carried out to ascertain analgesic, and antioxidant activity of the ethanol extract of the leaves of Cerbera manghas Linn. (FamilyApocynaceae). The presence of reducing sugars, tannins, steroids, alkaloids, glycosides, and flavonoids were indicated by the phytochemical analysis of the extract. To evaluate analgesic a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Molbank
سال: 2010
ISSN: 1422-8599
DOI: 10.3390/m709