Twentieth Symposium on Biotechnology for Fuels and Chemicals 70174 Stuttgart The present book is special van Oystaeyen The present book is special because of its very complete treatment of groups containing reversions and because it avoids the use of matrices to represent Moebius maps François Verbal strategies: A neglected dimension in language acquisition studies Di Pietro tech nical topics included: Session 1: Feedstocks: New Supplies and Processing Session 2: Applied Biological Research Session 3: Bioprocessing Research Session 4: Emerging Opportunities for Industrial Chemicals Session 5: Bioprocess Evaluation and Confirmation Session 6: Enzymatic Processes and Enzyme Production Special topic discussions were held on "Defining the Future Separa tions Needs Derived from Bioprocessing" by Earl Beaver With the Twentieth Symposium