Selected papers: Oral Presentations. General introduction to biocatalysis and screening (K. Kieslich). A Japanese screening approach: selection of an opine dehydrogenase and alkaline D-peptidase (Y. Asano). The enormous diversity and biotechnological potential of naturally occurring bacteria (E. Stackebrandt). Fluorescence screening for lipolytic enzymes (A. Hermetter et al.). Filtration and separation materials for analytical purposes (R.G. Hood). Screening for inhibitors of human brain myo-insitol monophosphatase (A.J. Ganzhorn et al.). Screening of bacteria at high temperatures to select nucleoside antibiotics producers (T. Utagawa). Posters. Passive and active screening of D-hydantoinase-producing microorganisms (A. Morin, D. Leblanc). Selection and study of a Candida molischiana mutant derepressed for & bgr;-glucosidase production: application to flavor development of wines and fruit juices (Y. Gueguen et al.). Characterization of some isoprenoid-biosynthetic enzymes from plant cell cultures (R. van der Heijden et al.). Isolation, partial purification and characterization of a novel cyclic dipeptidase (D.P. Pantaleone et al.). Screening cultures using solid state fermentation (S. Suryanarayan et al.). Screening for polysaccharide-degrading micro-organisms (H.J. Ruijssenaars et al.). Isolation of a chitosan degrading fungus, Penicillium spinulosum, and chitosanase production by the isolate (Ö. Ak et al.). Author Index.