تصفح Chemistry & Earth Sciences حسب المؤلف "Rizk, Abdel-Fattah M."
-
Constituents of Plants Growing in Qatar, Part XXVI: Phytochemical investigation of Rumex vesicarius
Al Easa, Hala S.; Rizk, Abdel-Fattah M.; Hussiney, Hussiney A. (1995 , Article)The study of Rumex vesicarius revealed the isolation and identification of four anthraquinones (chrysoplanol (I), emodin (II), physcion (III) and rhein (IV) and seven flavonoids (apigenin (V), isoorientin (VI), isovitesin ... -
Fatty acid composition of twelve algae from the Coastal Zones of Qatar
Heiba, Helmi I.; Al-Easa, Hala S.; Rizk, Abdel-Fattah M. ( Kluwer Academic Publishers , 1997 , Article)Fatty acid composition of twelve algal species from two different classes were determined. Three Chlorophyta species(Axetabularia calyxulux, Cladophors sericoides and Dictyosphaeria cavernosa) and nine Phaephyta species ... -
Flavonoids from Centaurea sinaica
Al-Easa, Hala S.; Kamel, Alaa; Rizk, Abdel-Fattah M. (1992 , Article)Four Newly isolated flavonoids from Centaurea sinaica -
Triterpenoids from Salvia aegyptiaca
Bruno, Maurizio; Ciriminna, Rosaria; Al-Easa, Hala S.; Rizk, Abdel-Fattah M. (1993 , Article)Newly isolated secondary metabolites from Salvia aegyptiaca growing in Qatar