Terpenoids from Atylosia scarabaeoides and their antimicrobial activity

Three terpenes-caryophyllene-4,5-oxide, a-amyrin and b-amyrin were isolated from the petroleum ether extract of Atylosia scarabaeoides. The structures of the compounds were confirmed by a series of 1D and 2D NMR and MS analyses. The minimum inhibitory concentration (MIC) of caryophyllene-4,5-oxide was found to be 50-200 mg/ml. Key words: Atylosia scarabaeoides; Papilionaceae; Caryophyllene-4,5-oxide; Chemotaxonomy; Antimicrobial Dhaka Univ. J. Pharm. Sci. Vol.4(2) 2005 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

Growth Analysis of Perennial Grasses in Tropical India II. Herbage Growth in Mixed Grass/Legume Swards

SummaryThe perennial grass Pennisetum polystachyon was grown alone or in mixture with the indigenous legumes Atylosia scarabaeoidesand Clitoria ternata and the exotic species Calopogonium mucunoides, Centrosema pubescens and Stylosanthes gracilis. Only the last two persisted for more than one or two years. Mean annual yield from the mixture containing Centrosema was 61 to 65 q./ha., of which 20 per cent was legume herbage. The protein content of grass was about 3 to 6 per cent and of legumes 10 to 14 per cent. Mixed swards produced as much protein as in a previous experiment where pure swards of Pennisetum polystachyon received 44. kg./ha. of nitrogen in fertilizer form. Soil nitrogen increased under the Centrosema mixture and yields from the mixture increased during the experiment. Yields of grass herbage from the mixtures were generally lower than those of the grass swards. The reduction in yield of grass grown in mixed swards was mostly due to decreases in the area of foliage rather than to reductions in net assimilation rate.