1. Ammonia switch-off of nitrogenase from Rhodobacter sphaeroides and Methylosinus trichosporium: no evidence for Fe protein modification

   • Duane C. Yoch
   • Jiudi Li
   • Christopher Scholin

   Original Papers Pages: 1 - 5

2. Nickel requirement for the formation of active urease in purple sulfur bacteria (Chromatiaceae)

   • Eckhard Bast

   Original Papers Pages: 6 - 10

3. Glycine fermentation by Clostridium histolyticum

   • H. Lebertz
   • J. R. Andreesen

   Original Papers Pages: 11 - 14

4. Nodulation of soybean roots by an isolate of Bradyrhizobium japonicum with reduced firm attachment capability

   • Stephen J. Vesper
   • T. V. Bhuvaneswari

   Original Papers Pages: 15 - 19

5. Inhibition of motility and phototaxis in the green flagellate, Euglena gracilis, by UV-B radiation

   • Donat-P. Häder
   • Maria A. Häder

   Original Papers Pages: 20 - 25

6. Lactate conversion to acetate, CO₂ and H₂ in cell suspensions of Desulfovibrio vulgaris (Marburg): indications for the involvement of an energy driven reaction

   • Ishverlal P. Pankhania
   • Alfred M. Spormann
   • Rudolf K. Thauer

   Original Papers Pages: 26 - 31

7. Bacterial NAD(P)-independent quinate dehydrogenase is a quinoprotein

   • M. A. G. van Kleef
   • J. A. Duine

   Original Papers Pages: 32 - 36

8. How hexoses and inhibitors influence the malate transport system in Zygosaccharomyces bailii

   • E. Herzberger
   • F. Radler

   Original Papers Pages: 37 - 41

9. Sulfonolipids are localized in the outer membrane of the gliding bacterium Cytophaga johnsonae

   • Walter Godchaux III
   • Edward R. Leadbetter

   Original Papers Pages: 42 - 47

10. Ethanol production from xylose by Thermoanaerobacter ethanolicus in batch and continuous culture

    • Lynda S. Lacis
    • Hugh G. Lawford

    Original Papers Pages: 48 - 55

11. Fumarate reduction systems in members of the family Rhodospirillaceae with different quinone types

    • Akira Hiraishi

    Original Papers Pages: 56 - 60

12. Organization of the nif genes in cyanobacteria in symbiotic association with Azolla and Anthoceros

    • John C. Meeks
    • Cecillia M. Joseph
    • Robert Haselkorn

    Original Papers Pages: 61 - 71

13. Investigations on microbial sulfur respiration

    • A. Zöphel
    • M. C. Kennedy
    • P. M. H. Kroneck

    Original Papers Pages: 72 - 77

14. Degradation of chlorosubstituted aromatic compounds by Pseudomonas sp. strain B13: fate of 3,5-dichlorocatechol

    • Uwe Schwein
    • Eberhard Schmidt
    • Walter Reineke

    Original Papers Pages: 78 - 84

15. Utilization of organic compounds as the sole source of nitrogen by Thiobacillus thiooxidans

    • Norbert Metzdorf
    • Heinrich Kaltwasser

    Original Papers Pages: 85 - 88

16. Optimum culture conditions for the production of benzonitrilase by Rhodococcus rhodochrous J1

    • Toru Nagasawa
    • Michihiko Kobayashi
    • Hideaki Yamada

    Original Papers Pages: 89 - 94

17. Metabolism of 2,4-dichlorophenoxyacetic acid, 4-chloro-2-methylphenoxyacetic acid and 2-methylphenoxyacetic acid by Alcaligenes eutrophus JMP 134

    • Dietmar Helmut Pieper
    • Walter Reineke
    • Hans-Joachim Knackmuss

    Original Papers Pages: 95 - 102

18. Thermotoga neapolitana sp. nov. of the extremely thermophilic, eubacterial genus Thermotoga

    • Holger W. Jannasch
    • Robert Huber
    • Karl O. Stetter

    Short Communication Pages: 103 - 104