Biotechnology, Opportunities and Constraints.- Immobilized Cell Systems for Energy Production.- Bioconversions in Heterogeneous Systems.- Enzymatic Organic Synthesis.- Harnessing Biologically-Catalysed Electron Transfer Reactions for Biosensors.- The D-alanyl-D-alanine cleaving peptidases and ?-lactamases: structure and mechanism.- Industrial Production of Monoclonal Antibodies in Cell Culture.- Effect of Molecular Hydrogen on Acetate Degradation by Methanosarcina barkeri 227.- In vitro Induction of Nitrogenase Activity in Free-Living Rhizobia by a Non-Nodulating Legume.- On the Evolution of Alcohol Tolerance in Microorganisms.- Industrial Applications of Plant Cell Culture: Metabolic Production.- Cloning of Genes in Streptomycetes for Secondary Metabolism.- Application of Recombinant DNA Technology to Antibiotic Production.- Technology Transfer from University to Industry.- List of Contributors.