科研之友
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摘要
Alstonia scholaris (L.) R. Br. is a plant of family Apocynaceae and has a great medicinal importance. It is widely used by tribal people to treat various diseases and ailments. The present communication deals with the organoleptic and preliminary physico-phytochemical studies of the stem bark of the plant. The organoleptic study was done according to the W.H.O. guidelines for medicinal plants. The physicochemical parameters viz. loss on drying, ash values and extractive values were calculated. Soxhlet extraction of the powdered plant material was done with 80% ethanol and then partitioned with petroleum ether, ethyl acetate and n-butanol subsequently. The percentage yields of different solvent fractions were calculated and then they were subjected to preliminary phytochemical screening which indicated the presence of alkaloids, carbohydrates, tannins, terpenoids, saponins, flavonoids, steroids and fixed oils and fats.
