1. Surface solar ultraviolet radiation for paleoatmospheric levels of oxygen and ozone

   • Joel S. Levine

   OriginalPaper Pages: 313 - 323

2. Are sulfur isotope ratios sufficient to determine the antiquity of sulfate reduction

   • Debra Ashendorf

   OriginalPaper Pages: 325 - 333

3. γ-Irradiation of malic acid in aqueous solutions

   • Alicia Negron-Mendoza
   • Rebecca L. Graff
   • Cyril Ponnamperuma

   OriginalPaper Pages: 335 - 341

4. Urea-acetylene dicarboxylic acid reaction: A likely pathway for prebiotic uracil formation

   • A. S. Subbaraman
   • Z. A. Kazi
   • M. S. Chadha

   OriginalPaper Pages: 343 - 347

5. Computer experiment for selection of optical isomer during prebiotic polymerization

   • Y. Yamagata
   • H. Sakihama
   • K. Nakano

   OriginalPaper Pages: 349 - 355

6. A similarity ring for amino acids based on their evolutionary substitution rates

   • Edward Argyle

   OriginalPaper Pages: 357 - 360

7. Compartmentalization of self-reproducing machineries: Multiplication of microsystems with self-instructing polymerization of amino acids

   • Koichiro Matsuno

   OriginalPaper Pages: 361 - 370

8. Life in the Universe Paris, November 19–21, 1979

   • Francois Raulin

   Conference Report Pages: 371 - 377

9. Chemical evolution and the origin of life

   • Linda G. Pleasant
   • Cyril Ponnamperuma

   Legacy Pages: 379 - 401

10. Book review

    • Andrew H. Knoll

    BookReview Pages: 405 - 406