1. Modification of the interaction betweenEscherichia coli and bacteriophage in saline sediment

   • Margaret M. Roper
   • K. C. Marshall

   OriginalPaper Pages: 1 - 13

2. Scanning electron microscopy of microorganisms on the roots of wheat

   • A. D. Rovira
   • R. Campbell

   OriginalPaper Pages: 15 - 23

3. Microbial transformations of some¹⁴C-labeled substrates in coastal water and sediment

   • Carl O. Wirsen
   • Holger W. Jannasch

   OriginalPaper Pages: 25 - 37

4. Effects of PCB on interspecific competition in natural and gnotobiotic phytoplankton communities in continuous and batch cultures

   • Nicholas S. Fisher
   • Edward J. Carpenter
   • Charles F. Wurster

   OriginalPaper Pages: 39 - 50

5. The identification of gas vacuoles and their abundance in the hypolimnetic bacteria of Arco Lake, Minnesota

   • A. E. Walsby

   OriginalPaper Pages: 51 - 61

6. Microbial degradation of model petroleum at low temperatures

   • J. D. Walker
   • R. R. Colwell

   OriginalPaper Pages: 63 - 95

7. Decomposition of deciduous leaf litter in a woodland stream

   • K. F. Suberkropp
   • M. J. Klug

   OriginalPaper Pages: 96 - 103

8. Coexistence of organisms competing for the same substrate: An example among the purple sulfur bacteria

   • Hans van Gemerden

   OriginalPaper Pages: 104 - 119

9. Refractive index of uranyl-treated bacterial cytoplasm as related to ribonucleic-acid content and growth rate

   • G. W. Fuhs
   • M. Chen

   OriginalPaper Pages: 120 - 125

10. Vibrio parahaemolyticus andVibrio alginolyticus: Short generation-time marine bacteria

    • S. Ulitzur

    OriginalPaper Pages: 127 - 135

11. Factors affecting trimethylarsine and dimethylselenide formation byCandida humicola

    • D. P. Cox
    • M. Alexander

    OriginalPaper Pages: 136 - 144

12. Applicability of radiotracer methods of measuring¹⁴CO₂ assimilation for determining microbial activity in soil including a newin situ method

    • Ronald M. Atlas
    • Jerry S. Hubbard

    OriginalPaper Pages: 145 - 163

13. Kinetics of phosphorus absorption byCorynebacterium bovis

    • Min Chen

    OriginalPaper Pages: 164 - 175

14. Restricted pH ranges and reduced yields for bacterial growth under pressure

    • Philip Matsumura
    • Daniel M. Keller
    • Robert E. Marquis

    OriginalPaper Pages: 176 - 189

15. The ecology of mercury-resistant bacteria in Chesapeake Bay

    • J. D. Nelson Jr.
    • R. R. Colwell

    OriginalPaper Pages: 191 - 218

16. Optimization of procedures for the recovery of heterotrophic bacteria from marine sediments

    • C. D. Litchfield
    • J. B. Rake
    • D. J. Stein

    OriginalPaper Pages: 219 - 233

17. Influence of clay minerals on sorption of bacteriolytic enzymes

    • Guno Haskå

    OriginalPaper Pages: 234 - 245

18. Chemosensory responses by the heterotrophic marine dinoflagellateCrypthecodinium cohnii

    • Donald C. R. Hauser
    • M. Levandowsky
    • J. S. Hollwitz

    OriginalPaper Pages: 246 - 254

19. Wolf Vishniac

    • Peter Hirsch

    Announcement Pages: i - i