TY - GEN AU - Dalia Mohamed Rasheed AU - Hala El Hefnawy , AU - Hala Elhefnawy , AU - Kamilia Foli Taha , TI - A Phytochemical Study of Certain Egyptian Plants with Antioxidant Activity / PY - 2006/// CY - Cairo : PB - Dalia Mohamed Rasheed , KW - Antioxidant Activity KW - Phytochemical N1 - Thesis (M.Sc.) - Cairo University - Faculty Of Pharmacy - Department Of Pharmacognosy; Issued also as CD N2 - These extracts were tested in vivo on lipid peroxidation in ethanol - CCl4 induced liver toxicity model EtOAc fraction of these two extracts was proved to be responsible for the antioxidant activity by DPPH assay , and it was further purified via polyamide , cellulose and sephadex LH - 20 column chromatography Antioxidant compounds were isolated and identified through spectroscopic methods as (quercitrin) and (isoquercitrin) in Pgraveolens extract , (reynoutrin) , (rutin) and gallic acid in C siliqua extract Furthermore , standardization of both plant extracts was carried out by determination of the total polyphenol content using Folin - Ciocalteu colorimetric method Total flavonoid content was determined by spectrophotometric and HPLC methods UR - http://172.23.153.220/th.pdf ER -