1. Editorial

   EditorialNotes Pages: 343 - 344

2. Announcements

   Announcement Pages: 345 - 345

3. Partial delignification of unbleached kraft pulp with ligninolytic fungi

   • T. Kent Kirk
   • H. H. Yang

   OriginalPaper Pages: 347 - 352

4. Selection of mandelamidase constitutive mutants in continuous culture ofPseudomonas putida

   • Peter D. Laverack
   • Patricia H. Clarke

   OriginalPaper Pages: 353 - 358

5. Measurement of penicillin acylase and cephalosporin acylase in fermentation broths

   • N. H. Spliid
   • C. Emborg

   OriginalPaper Pages: 359 - 364

6. Ethanol production with Saccharomyces cerevisiae at potassium-limited aerobic growth conditions

   • Mogens Wümpelmann
   • Leif Kjaergaard

   OriginalPaper Pages: 365 - 370

7. Production of vitamin B12 by gram-variable methanol-utilizing bacteria

   • G. Duménil
   • A. Crémieux
   • D. Ballerini

   OriginalPaper Pages: 371 - 376

8. Growth of Escherichia coli in phosphate limited cultures : Measurements and modelling

   • R. Guthke
   • B. Sikyta
   • W. A. Knorre

   OriginalPaper Pages: 377 - 382

9. Subsequent transfers of yeast may lead via single gene mutations to alterations of the species

   • U. Stahl
   • K. Essee

   OriginalPaper Pages: 383 - 385

10. Forthcoming papers

    Announcement Pages: 386 - 386