1. Regulation of nitrogenase levels in Anabaena sp. ATCC 33047 and other filamentous cyanobacteria

   • Juan L. Ramos
   • Francisco Madueño
   • Miguel G. Guerrero

   Original Papers Pages: 105 - 111

2. Comparison of Photosystem-I and Photosystem-II activities of spheroplasts from normal and photobleached Anabaena cylindrica

   • Ilona Laczkó

   Original Papers Pages: 112 - 115

3. Methanosphaera stadtmaniae gen. nov., sp. nov.: a species that forms methane by reducing methanol with hydrogen

   • Terry L. Miller
   • Meyer J. Wolin

   Original Papers Pages: 116 - 122

4. Diversity of nif gene location and nitrogen fixation among root-associated Enterobacter and Klebsiella strains

   • Outi Väsänen
   • Kielo Haahtela
   • Veronica Sundman

   Original Papers Pages: 123 - 127

5. Survival of Brevibacterium linens during nutrient starvation and intracellular changes

   • Patrick Boyaval
   • Evelyne Boyaval
   • Michel J. Desmazeaud

   Original Papers Pages: 128 - 132

6. Dependence of the specific growth rate of methanogenic mutualistic cocultures on the methanogen

   • David B. Archer
   • Godfrey E. Powell

   Original Papers Pages: 133 - 137

7. Unsaturated fatty acid composition and biosynthesis in Oscillatoria limnetica and other cyanobacteria

   • Aharon Oren
   • Ali Fattom
   • Alisa Tietz

   Original Papers Pages: 138 - 142

8. Regulation of lysine and dipicolinic acid biosynthesis in Bacillus brevis ATCC 10068: significance of derepression of the enzymes during the change from vegetative growth to sporulation

   • Adavani S. Rao

   Original Papers Pages: 143 - 150

9. Control of the syntheses of bacteriochlorophyll, c- and b-type cytochromes, and coproporphyrin III in Rhodopseudomonas sphaeroides mutant H5

   • I. Hauser-Gerspach
   • J. Oelze

   Original Papers Pages: 151 - 155

10. Isolation and characterisation of catechol-like siderophore from cowpea Rhizobium RA-1

    • Mayuranki Modi
    • K. S. Shah
    • V. V. Modi

    Original Papers Pages: 156 - 158

11. Effects of UV-B on motility and photobehavior in the green flagellate, Euglena gracilis

    • Donat-P. Häder

    Original Papers Pages: 159 - 163

12. Is organic acid required for nutrition of thermophilic fungi?

    • Sita Devi Gupta
    • Ramesh Maheshwari

    Original Papers Pages: 164 - 169

13. Altered control of glutamate dehydrogenases in ornithine utilization mutants of Pseudomonas aeruginosa

    • Rainer Früh
    • Dieter Haas
    • Thomas Leisinger

    Original Papers Pages: 170 - 176

14. Evidence for the occurrence of autolytic enzymes in Methanobacterium wolfei

    • H. König
    • R. Semmler
    • J. Winter

    Original Papers Pages: 177 - 180