Alkaloids from the leaves of Strychnos wallichiana

The leaves of Strychnos wallichiana Steud. ex. DC. from Bangladesh contain icajine and novacine as their major alkaloids. Smaller amounts of strychnine, brucine, pseudostrychnine, pseudobrucine, N-methyl-sec.-pseudo-β-colubrine, 14-hydroxyicajine, strychnine N-oxide, and brucine N-oxide are also present. The new bases 14 hydroxynovacine and icajine N-oxide have been isolated.     

Some notes on the trichoptera of standing waters in Africa,mainly south of the Zambezi

Summary In this paper records of Trichoptera in literature dealing with the standing waters of Africa south of the Zambezi, and from the relevant collections of material, are brought together and compared with those from elsewhere in the Ethiopian Region. The Trichopterous fauna of different types of standing waters in Southern Africa is described, and reasons for the lack of variety in the fauna are suggested. One of the main restrictive factors in their distribution appears to be the hydrogen ion concentration in the water, or some other factor controlled by it.National Institute for Water ResearchRead at the Annual Congress of the Limnological Society of Southern Africa.