Estimate of the flavonoids in the Leavesof BayLaurel Studying their Bio-activity

Abstract

The recent study a imed at extracting and estimating  some of the secondary metabolic compounds  taken from  Leaves of Bay Laurel due to their important benefits for  the human health . the flavonoids  were  and registered 12.7% and alkaloids 7.8 %. some of the dietary valu in the leaves of Bay Laurel-moistur ,total Sold materia, ash, oil, fiber were 5.7%, 94.3%, 20%, 1.7%, 15.1%, respectively. The kinds of Filavovonid in leaves of Bay Laurel were estimated also by the HPLC Techniqe .They were as following: Apigenin, Luteolin, Quercetin, Chrysin, Myricetin, Kaempferol and Hesperetin.so  they registered their values: 11.5, 14.19, 11.1, 11.3, 10.9, 10.65, 8.49 a respectively by unit μg/ ml. by Comparison with the standard flavonoids kinds as well as studying the bio-activity of the flavonid  extract against bacteria, four concentrations form the flavonid extract were prepared: (50,100,150,200)mg/ml. concentrations (150,200) mg/ ml gave an inhibition against positive and negative –grem bacteria against normal Genamicin Sulfate where as the an centrations 100 mg/ ml did not give an any inhibition against negative germ bacteria but give a little inhibition gainst the positive-germ bacteria compared with  normal inhibition. the concentrations 150 mg/ml did not give any inhibition against the  negative and positive –germ bacteria compared with  normal inhibition Genamicin Sulfate .