1. Editorial

   • Hauke Hennecke
   • Achim Kröger
   • Bernhard Schink

   EditorialNotes Pages: 99 - 99

2. The regulation of ribosomal RNA synthesis and bacterial cell growth

   • Rolf Wagner

   Minireview Pages: 100 - 109

3. Fungal thermostable α-dialkylamino acid aminotransferase: occurrence, purification and characterization

   • Nobuyoshi Esaki
   • Mutsumi Watanabe
   • Kenji Soda

   Original Papers Pages: 110 - 115

4. Thiosulfate and tetrathionate degradation as well as biofilm generation by Thiobacillus intermedius and Thiobacillus versutus studied by microcalorimetry, HPLC, and ion-pair chromatography

   • Susanne Wentzien
   • Wolfgang Sand
   • Ralf Steudel

   Original Papers Pages: 116 - 125

5. Acetogenesis coupled to the oxidation of aromatic aldehyde groups

   • Anita Gößner
   • Steven L. Daniel
   • Harold L. Drake

   Original Papers Pages: 126 - 131

6. Evidence that phenol phosphorylation to phenylphosphate is the first step in anaerobic phenol metabolism in a denitrifying Pseudomonas sp.

   • Achim Lack
   • Georg Fuchs

   Original Papers Pages: 132 - 139

7. Reversible hydrogenase in Anabaena variabilis ATCC 29413

   • Larissa Serebriakova
   • Nikolaj A. Zorin
   • Peter Lindblad

   Original Papers Pages: 140 - 144

8. Incorporation of specific wall proteins during yeast and mycelial protoplast regeneration in Candida albicans

   • Maria Victoria Elorza
   • Antonio Marcilla
   • Rafael Sentandreu

   Original Papers Pages: 145 - 151

9. Morphological and molecular characterization of Frankia sp. isolates from nodules of Alnus nepalensis Don

   • G. Ganesh
   • A. K. Misra
   • P. Normand

   Original Papers Pages: 152 - 155

10. Oxygen consumption kinetics of Nitrosomonas europaea and Nitrobacter hamburgensis grown in mixed continuous cultures at different oxygen concentrations

    • Hendrikus J. Laanbroek
    • Paul L. E. Bodelier
    • Saskia Gerards

    Original Papers Pages: 156 - 162

11. Isolation and characterisation of porin from the outer membrane of Synechococcus PCC 6301

    • Alfred Hansel
    • Angela Schmid
    • Uwe J. Jürgens

    Original Papers Pages: 163 - 167

12. Formation of l-alanine as a reduced end product in carbohydrate fermentation by the hyperthermophilic archaeon Pyrococcus furiosus

    • Servé W. M. Kengen
    • Alfons J. M. Stams

    Original Papers Pages: 168 - 175

13. The extracellular nuclease of Serratia marcescens: studies on the activity in vitro and effect on transforming DNA in a groundwater aquifer microcosm

    • Ingrid Ahrenholtz
    • Michael G. Lorenz
    • Wilfried Wackernagel

    Original Papers Pages: 176 - 183

14. Sporicidal activity of tertiary butyl hydroperoxide

    • Soon Young Shin
    • Robert E. Marquis

    Original Papers Pages: 184 - 190

15. Purification and properties of a homodimeric protocatechuate 4,5-dioxygenase from Rhizobium leguminosarum

    • Yung Pin Chen
    • Charles R. Lovell

    Original Papers Pages: 191 - 195

16. Molecular biology of membrane bound H₂ uptake hydrogenases

    • Paulette M. Vignais
    • Bertrand Toussaint

    Erratum Pages: 196 - 196

17. 1993 Acknowledgement to referees

    Acknowledgments Pages: 197 - 197