1. Editorial

   • John D. Bu'Lock

   EditorialNotes Pages: 103 - 104

2. Guest editorial

   • Arnold L. Demain

   EditorialNotes Pages: 105 - 108

3. Immobilization of proteinases on Chitosan

   • Jean-Louis Leuba
   • François Widmer

   OriginalPaper Pages: 109 - 114

4. Accumulation of lipid byRhodotorula glutinis in continuous culture

   • Colin Ratledge
   • Michael J. Hall

   OriginalPaper Pages: 115 - 120

5. Growth of microorganisms on insoluble polymers: Transformation of automobile tires

   • Marcel D. Faber
   • W. J. Nickerson

   OriginalPaper Pages: 121 - 126

6. Comparison of the fermentation kinetics of cephalosporium acremonium in shake flasks and fermenters by means of ribonucleic acid measurements

   • M. T. Küenzi

   OriginalPaper Pages: 127 - 132

7. Direct immobilization of milk xanthine oxidase in milk protein with and without addition of gelatin

   • J. Tramper
   • H. C. van der Plas
   • F. Müller

   OriginalPaper Pages: 133 - 138

8. Multiple continuous stirred tank reactors VS. Batch reactors — some design considerations

   • N. G. Karanth

   OriginalPaper Pages: 139 - 144

9. Patenting the products of genetic engineering

   • Harold C. Wegner

   OriginalPaper Pages: 145 - 150