Browsing by Author "Rizk, A. M."
Now showing items 21-23 of 23
-
Methylated Flavonoids From Artemisia Monosperma
Ismail, S. I. [شمس الدين امبابي اسماعيل]; Hammouda, F. M.; Rizk, A. M.; Hassan, N. M. ( Qatar University , 1989 , Article)Investigation of the flavonoid constituents of Artemisia monosperma resulted in the isolation and identification of four methylated flavonoids: quercetin 3,3',4'-trimethylether, diosmetin (luteolin 4'-methylether), ... -
Occurrence of pyrrolizidine alkaloids in Heliotropium bacciferum Forssk. Constituents of plants growing in Qatar XIII
Rizk, A. M.; Hammouda, F. M.; Roder, E.; Wiedenfeld, H.; Ismail, S. I.; Hassan, N. M.; Hosseiny, H. A.... more authors ... less authors (1988 , Article)N/A. -
Poisonous plants contaminating edible ones and toxic substances in plant foods IV. Phytochemistry and toxicity of lolium temulentum
Hammouda, F. M.; Rizk, A. M.; El-Missiry, M. M.; Ghaleb, H. A.; Madkour, M. K.; Pohland, A. E.; Wood, G.... more authors ... less authors ( Taylor & Francis , 2008 , Article)Different procedures were carried out for the preparation and separation of the total alkaloids of Lolium temulentum. Loline has been identified as the major pyrrolizidine alkaloid of the seeds. The toxicity of the alcoholic ...