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Biomedical subjects

B Koster

Publications and source records attributed to B Koster.

7 recordsLinked to original sources
PubMed2001

Pseudodestruxins A and B: new cyclic depsipeptides from the coprophilous fungus Nigrosabulum globosum.

Pseudodestruxins A (1) and B (2), two new cyclic peptides, have been isolated from cultures of the coprophilous fungus Nigrosabulum globosum. The structure of pseudodestruxin A (1) was elucidated using 2D NMR techniques and confirmed by single-crystal X-ray diffraction analysis. The structure of 2 was assigned by comparing its NMR and FABMS data with those of compound 1. The known compounds ascochlorin and 5-chlorocollectorin B were also isolated from N. globosum. Although 1 and 2 display antibacterial effects, ascochlorin was found to be responsible for the antifungal activity of the crude extract.

Amino Acids↗
PubMed2001

Bombardolides: new antifungal and antibacterial gamma-lactones from the coprophilous fungus Bombardioidea anartia.

Chemical studies of organic extracts from cultures of the coprophilous fungus Bombardioidea anartia have led to the discovery of bombardolides A--D (1--4), a series of new antifungal and antibacterial metabolites. Three of these metabolites (1--3) were obtained as inseparable pairs of geometric isomers. A new 3-substituted phenol (5) and the known compound asterriquinone B4 were also encountered. The structures of compounds 1--5 were determined by analysis of NMR and MS data.

Animals↗
PubMed1999

Sporovexins A-C and a new preussomerin analog: antibacterial and antifungal metabolites from the coprophilous fungus Sporormiella vexans.

Sporovexins A-C (1-3) and 3'-O-desmethyl-1-epipreussomerin C (4) have been isolated from liquid cultures of the coprophilous fungus Sporormiella vexans (JS 306). The structures of these new metabolites were elucidated on the basis of MS and NMR analysis. Compounds 1 and 4 show antifungal activity against competitor fungi, as well as antibacterial effects.

Anti-Infective Agents↗
PubMedDate not supplied

Rapid access to blood bank records on microfilm.

A rapid data retrieval system for blood banks is described based on a computer service generated index to microfilm records. Use of microfilm for the index and a reader/printer for the microfilm permits "hard copy" of old records within minutes. This approach has resulted in more rapid and efficient access to back records with a substantial decrease in space requirements, and without computer hardware costs.

Blood Banks↗