1. Editorial: The future of bioscience research

   • Richard L. Masters

   EditorialNotes Pages: 3 - 4

2. The history of atmospheric oxygen

   • M. G. Rutten

   OriginalPaper Pages: 5 - 17

3. Human circadian circulatory rhythms during weightlessness in extraterrestrial flight or bedrest with and without exercise

   • Franz Halberg
   • Carlos Vallbona
   • Sarah A. Nunneley

   OriginalPaper Pages: 18 - 32

4. Multi-purpose monitoring of carbon dioxide in closed organism-environment systems

   • Maurice Stupfel
   • Walter Nelson
   • Franz Halberg

   OriginalPaper Pages: 33 - 39

5. Basic studies onHirudo medicinalis for a space experiment

   • R. G. A. Lotz
   • M. E. A. Fuchs
   • P. E. A. Moyat

   OriginalPaper Pages: 40 - 44

6. Basic studies onHirudo medicinalis for a space experiment

   • R. G. A. Lotz
   • G. H. Bowman

   OriginalPaper Pages: 45 - 47

7. Microbial contamination associated with the Apollo 6 spacecraft during final assembly and testing

   • John R. Puleo
   • N. D. Fields
   • R. C. Graves

   OriginalPaper Pages: 48 - 56

8. Biochemical and metabolic effects of a six-month exposure of small animals to a helium-oxygen atmosphere

   • Robert W. Hamilton Jr.
   • Janis D. Cohen
   • Heinz R. Schreiner

   OriginalPaper Pages: 57 - 99

9. The effect of positive pressure breathing on the cerebral circulation and the content of catecholamines in hypothalamus and adrenals

   • Aleksandar I. Radović
   • Jovan M. Davidović
   • Vukosava S. Davidović

   OriginalPaper Pages: 100 - 108

10. Photoelectric device for recording of leaf movements

    • T. W. Tibbitts
    • T. Hoshizaki
    • D. K. Alford

    Research Notes Pages: 109 - 112

11. A miniaturized pump oxygenator for evaluation of peripheral circulatory changes induced by longterm weightlessness in rats

    • V. P. Popovic
    • J. Horecky
    • P. Popovic

    Research Notes Pages: 113 - 115