1. Meetings calendar

   Events Pages: 49 - 50

2. Editorial

   EditorialNotes Pages: 51 - 52

3. Extractive bioconversion in aqueous two-phase systems. A model study on the conversion of cellulose to ethanol

   • Bärbel Hahn-Hägerdal
   • Bo Mattiasson
   • Per-Åke Albertsson

   OriginalPaper Pages: 53 - 58

4. Regulatory mutants affecting the use of the TOL catabolic plasmid in strain construction

   • C. L. Wong
   • N. W. Dunn

   OriginalPaper Pages: 59 - 64

5. Immobilization of microbial cells in polyurethane matrices

   • J. Klein
   • M. Kluge

   OriginalPaper Pages: 65 - 70

6. Metabolic and genetic aspects of the relationship between growth and tetracycline production in Streptomyces aureofaciens

   • A. L. Colombo
   • N. Crespi-Perellino
   • C. Spalla

   OriginalPaper Pages: 71 - 76

7. Direct fermentation of cellulose to ethanol by a cellulolytic filamentous fungus, Monilia sp.

   • Cheng-shung Gong
   • Christine M. Maun
   • George T. Tsao

   OriginalPaper Pages: 77 - 82

8. Effects of organism type and growth conditions on cell disruption by impingement

   • C. R. Engler
   • C. W. Robinson

   OriginalPaper Pages: 83 - 88

9. Conversion of D-xylose into ethanol by the yeast Pachysolen tannophilus

   • H. Schneider
   • P. Y. Wang
   • R. Maleszka

   OriginalPaper Pages: 89 - 92

10. Acetic acid production by immobilized acetobacter cells

    • C. Ghommidh
    • J. M. Navarro
    • G. Durand

    OriginalPaper Pages: 93 - 98

11. Immobilization of hydrogenases for biophotolytic hydrogen production; stability and kinetics

    • R. H. A. Plasterk
    • K. K. Rao
    • D. O. Hall

    OriginalPaper Pages: 99 - 104