Contents: A.A. Leslie Gunatilaka: Triterpenoid Quinonemethides and Related Compounds (Celastroloids). - P. Walser-Volken and Ch. Tamm: The Spirostaphylotrichins and Related Microbial Metabolites. The volumes of this classic series, now referred to simply as "Zechmeister after its founder, L. Zechmeister, have appeared under the Springer Imprint ever since the series inauguration in 1938. The volumes contain contributions on various topics related to the origin, distribution, chemistry, synthesis, biochemistry, function or use of various classes of naturally occurring substances ranging from...
Contents: A.A. Leslie Gunatilaka: Triterpenoid Quinonemethides and Related Compounds (Celastroloids). - P. Walser-Volken and Ch. Tamm: The Spirostaphy...
The condensed tannins (syn. polymeric proanthocyanidins) represent a major group of phenolic compounds in woody and some herbaceous plants (1-3). Their exceptional concentrations in the barks and heartwoods of a variety of tree species have resulted in their commercial extraction with the initial objective of applying the extracts in leather manufacture (4). Essentially all of their biological significance, e. g. the protection of plants from insects, diseases and herbivores, and most of the current, e. g. leather manufacture, and also most promising new uses, e. g. pharmaceuticals or wood...
The condensed tannins (syn. polymeric proanthocyanidins) represent a major group of phenolic compounds in woody and some herbaceous plants (1-3). Thei...
In order to make further progress in elucidating the mechanism of NOS catalysis it will be essential to throw light on the interaction between the enzyme and its substrate. An understanding of the catalytic site will also assist the development of therapeutically important NOS inhibitors. In particular. it will be useful to uncover any differences that exist between the substrate binding sites of the three NOS isozymes which might be exploited for the development of isoform selective NOS inhibitors. A comparison of NOS to other Arg-binding proteins has shown no significant sequence homology...
In order to make further progress in elucidating the mechanism of NOS catalysis it will be essential to throw light on the interaction between the enz...
For centuries preparations containing resin from the root of Thapsia garganica L. (Fig. 1) have been used in Arabian and European medicine for treatment of pulmonary diseases, catarrh and as counterirritants for relief of rheumatic pains (1). The properties of the resin were described already by Theophrastos (372-287 B. C. ), Dioscorides (approximately A. D. 50), and Plinius (A. D. 24-79) (2). Radix Thapsiae and Resina Thapsiae have been included in several pharmacopoeias, the latest in the French pharmacopoeia from 1937. The two major active principles were about Fig. I. Thapsia garganica...
For centuries preparations containing resin from the root of Thapsia garganica L. (Fig. 1) have been used in Arabian and European medicine for treatme...
The volumes of this classic series, now referred to simply as "Zechmeister" after its founder, L. Zechmeister, have appeared under the Springer Imprint ever since the series' inauguration in 1938. The volumes contain contributions on various topics related to the origin, distribution, chemistry, synthesis, biochemistry, function or use of various classes of naturally occurring substances ranging from small molecules to biopolymers. Each contribution is written by a recognized authority in his field and provides a comprehensive and up-to-date review of the topic in question. Addressed to...
The volumes of this classic series, now referred to simply as "Zechmeister" after its founder, L. Zechmeister, have appeared under the Springer Imprin...
Sulfonium compounds have been known to the organic chemist for almost 90 years. During most of this period they remained curiosities, well suited for didactic purposes to illustrate certain similarities to ether adducts and to organic ammonium compounds. Their exploration remained largely in the academic realm, because no unusual practical applications were found in spite of a steady increase in the attention paid to them. An event that occasionally puts a class of compounds into the center of interest is the recognition of its occurrence in nature and of special biological significance. The...
Sulfonium compounds have been known to the organic chemist for almost 90 years. During most of this period they remained curiosities, well suited for ...
La composition particuliere des lipides des Bacteries justifie pleinement la redaction de la presente revue; en effet, les Bacteries elaborent des lipides dont la composition est tres differente de celle des lipides des autres organismes, que ce soient des Champignons, des Algues ou des Animaux superieurs. L'interet porte actuellement a 1'etude des lipides bacteriens est egalement justifie par 1'importance biologique de certaines fractions lipidiques. Le domaine que nous allons resumer est d' ailleurs encore peu developpe; a part des etudes nombreuses et tres detaillees sur les lipides des...
La composition particuliere des lipides des Bacteries justifie pleinement la redaction de la presente revue; en effet, les Bacteries elaborent des lip...
