Composition and biological activities of seeds oils of two Crataegus species growing in Algeria

The oils extracted from seeds of two crataegus species (rosaceae),crataegus azarolus l. and crataegus monogyna jacq. collected from constantine (eastern algerian),were analyzed by gc and gc/ms. the main components of c. azarolus were tetradecamethylcycloheptasiloxane (39.43%),3,4-dihydroxytetramethylsilyl mandelic acid (19.23%),dodecamethylcyclohexasiloxane (17.14%),decamethylcyclopentasiloxane (10.57%) and 3-isopropoxy-1,1,1,7,7,7-hexamethyl-3,5,5 tris(trimethylsiloxy)tetrasiloxane (5.66%). it's the first report on c. monogyna seeds oil. the major constituents of c. monogyna seeds oil were found to be linoleic acid (44.2%),oleic acid (28.26%),oxalic acid,bis(trimethylsilyl) ester (9.74%),palmitic acid (6.56%) and tetracosamethylcyclododecasiloxane (5.04%). the antioxidant activity was investigated by the use of β-carotene bleaching method. antibacterial activity was performed according to disc diffusion and minimum inhibitory concentration (mic) methods. © 2017,university of mohammed premier oujda morocco.