Showing papers on "Medicinal plants published in 1991"

The Medicinal Plant Industry

Abstract: Plant Derived Medicines and Their Role in Global Health. Methodology of Economic Mapping of Medicinal Plants in the Spontaneous Flora. Biological Preconditions for Cultivation and Processing of Medicinal Plants. Agrotechnology of Medicinal Plants. Climatic and Geographical Aspects of Medicinal Plant Constituents. Methods for Biological Assessment of Plant Medicines. Technologies for the Processing of Medicinal Plants. Quality Control and Instrumental Analysis of Plant Extracts. Formulation of Plant Extracts into Dosage Forms. Some Current Trends in Medicinal Plants Research. Traditional Remedies and Modern Assessment: The Case of Ginseng. Utilization of Medicinal Plants: Recent Developments from the Chinese Experiences. Recent Developments from Indian Medicinal Plants. Recent Researches on Medicinal Plants in the African Region. Screening and Processing of Plant Materials for Potential Pharmaceutical Needs-Experiences and Application in Three Continents. Information on Medicinal Plants. Index.

Possible Medicinal Plants Used by Wild Chimpanzees, and Their Physiologically Active Compounds

Abstract: As a new approach to discovering physiologically active natural compounds, possible medicinal plants used by wild chimpanzees have been studied. Physiological and biological activity tests of three such plants, Vernonia amygdalina, Aspilia mossambicensis, and Ficus exasperata, indicated that they contain a variety of active compounds. Particularly, the activities of V amygdalina were remarkable, and hence further chemical studies were conducted. In the search for compounds of biological and physiological significance, in particular the bitter principles were investigated. Four known sesquiterpene lactones, vernodalin (1), vernolide (2), hydroxyvernolide (3) and vernodalol (4) were identified, and their anti-tumor and anti-bacterial activities were found. Furthermore, three bitter steroid glucosides and a related non-bitter glucoside, vernonioside Al (5), A2 (6), A3 (7) and B, (8) were isolated as new compounds. The significance of the use of V amygdalina by chimpanzees for the control of parasite related disease and avenues for future research on this topic are discussed.