1. Editorial

   • J. D. Bu'Lock

   EditorialNotes Pages: 231 - 231

2. Announcements

   Announcement Pages: 232 - 232

3. Penicillin production by mutants ofPenicillium chrysogenum resistant to polyene macrolide antibiotics

   • Jose M. Luengo
   • Gloria Revilla
   • Juan F. Martin

   OriginalPaper Pages: 233 - 238

4. Bench-scale reactors for composting research

   • A. M. Deschamps
   • P. Henno
   • J. M. Lebeault

   OriginalPaper Pages: 239 - 244

5. Phosphate permeability in cells ofChlorella ellipsoidea

   • Shuichi Aiba
   • Hisao Ohtake
   • Takafumi Inoue

   OriginalPaper Pages: 245 - 250

6. The determination of glucosyltransferase

   • Dorde Kobrehel

   OriginalPaper Pages: 251 - 254

7. A method for estimating biomass ofAgaricus bisporus in a solid substrate, composted wheat straw

   • D. A. Wood

   OriginalPaper Pages: 255 - 260

8. The effects of maintained tryptophan levels on ergot alkaloid production and overall tryptophan economy inClaviceps purpurea

   • J. D. Bu'Lock
   • J. G. Barr

   OriginalPaper Pages: 261 - 265

9. Biotechnology letters volume 1 number 7

   Legacy Pages: 266 - 266