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Abstract Part I: Phytochemical investigation of Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon. Chapter I: Preliminary phytochemical screening of fruits and bark of Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon. Chapter II: Phytochemical investigation of the petroleum ether fraction of Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon fruits. Four compounds were isolated, which are lupeol, octacosanol, β-sitosterol and betulin. Chapter III: Phytochemical investigation of the methylene chloride fraction of Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon fruits. Five compounds were isolated, which are 3,4-dihydro-2-(hydroxymethyl)-4-methyl-2H-pyrrol-2-ol, corosolic acid, ursolic acid, betulinic acid and β-sitosterol 3-O-β-D-glucoside. Chapter IV: Phytochemical investigation of the ethyl acetate fraction of Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon fruits. Four compounds were isolated, which are methyl gallate, gallic acid, catechin and ellagic acid. Chapter V: Comparative phytochemical investigation of bark and fruits of Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon. One additional compound was isolated from the bark which is 3-O-acetylursolic acid. Chapter VI: Study of the essential oil of the leaves of Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon. Chapter VII: Study of the fatty acid content of the fruits of Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon. Part II: Biological study of fruits, bark and leaves of Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon. Chapter I: Screening of the antioxidant activity of the different extracts of Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon. Chapter II: Microwell cytotoxicity assay using Artemia salina (Brine shrimp). Chapter III: Antimicrobial screening of the volatile oil of Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon leaves using adopting agar diffusion method. Chapter IV: Molluscicidal activity of fruits, bark and leaves of Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon. Part III: Botanical study of Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon. |