1. Recent advances in studies of evolutionary relationships between proteins and nucleic acids

   • Thomas H. Jukes

   OriginalPaper Pages: 469 - 490

2. Survival of micro-organisms in space

   • Peter R. Lorenz
   • Gert B. Orlob
   • Curtis L. Hemenway

   OriginalPaper Pages: 491 - 500

3. Hematological findings associated with chronic acceleration

   • R. R. Burton
   • A. H. Smith

   OriginalPaper Pages: 501 - 513

4. Biological losses and the quarantine policy for mars

   • S. Eric Steg
   • Richard G. Cornell

   OriginalPaper Pages: 514 - 519

5. Potential effects of recent findings on spacecraft sterilization requirements

   • S. Schalkowsky
   • L. B. Hall
   • R. C. Kline

   OriginalPaper Pages: 520 - 530

6. Release of microbial contamination from fractured solids

   • N. J. Petersen
   • R. G. Cornell
   • J. R. Puleo

   OriginalPaper Pages: 531 - 537

7. Prebiological membranes: Synthesis and properties

   • C. E. Folsome
   • H. J. Morowitz

   OriginalPaper Pages: 538 - 544

8. Cosmic-ray induced radioactivity in astronauts as a measure of radiation dose

   • R. L. Brodzinski
   • N. A. Wogman
   • R. W. Perkins

   OriginalPaper Pages: 545 - 553

9. Behavioral responses to short periods of lowered gravitational force in blind goldfish

   • R. J. von Baumgarten
   • J. Atema
   • M. Rocker

   OriginalPaper Pages: 554 - 564