1. Guest Editorial

   • Dieter Behrens

   EditorialNotes Pages: 157 - 158

2. Ammonia toxicity in liquid piggery manure digestion

   • R. Braun
   • Huber P.
   • Meyrath J.

   OriginalPaper Pages: 159 - 164

3. Support materials for stationary fixed film reactors for high-rate methanogenic fermentations

   • L. van den Berg
   • K. J. Kennedy

   OriginalPaper Pages: 165 - 170

4. Effect of aeration on large-scale cultures of plant cells

   • Nigel J. Smart
   • Michael W. Fowler

   OriginalPaper Pages: 171 - 176

5. Vacuum fermentation for ethanol production using strains of Zymomonas mobilis

   • J. H. Lee
   • J. C. Woodard
   • P. L. Rogers

   OriginalPaper Pages: 177 - 182

6. Immobilization of thermophilic microbial cells in crude egg white

   • M. De Rosa
   • A. Gambacorta
   • V. Buonocore

   OriginalPaper Pages: 183 - 186

7. Methanol dehydrogenase bioelectrochemical cell and alcohol detector

   • E. V. Plotkin
   • I. J. Higgins
   • H. A. O. Hill

   OriginalPaper Pages: 187 - 192

8. The bioenergetic correlation of COD to BOD

   • A. A. Esener
   • J. A. Roels
   • N. W. F. Kossen

   OriginalPaper Pages: 193 - 196

9. Meetings calendar

   Events Pages: 199 - 200