1. Issol 89 — Rhe origins of life and death

   • James P. Ferris

   Commentary Pages: 83 - 85

2. Biogenesis by cometary grains — Thermodynamic aspects of self-organization

   • Franz R. Krueger
   • Jochen Kissel

   OriginalPaper Pages: 87 - 93

3. Sulfur, ultraviolet radiation, and the early evolution of life

   • J. F. Kasting
   • K. J. Zahnle
   • A. T. Young

   OriginalPaper Pages: 95 - 108

4. The γ-irradiation of aqueous solutions of urea. Implications for chemical evolution

   • R. Navarro-González
   • A. Negrón-Mendoza
   • E. Chacón

   OriginalPaper Pages: 109 - 118

5. Chemical evolution of dehydrogenases: Amino acid pentacyanoferrate (II) as possible intermediates

   • Kamaluddin
   • Mala Nath
   • Sushama W. Deopujari

   OriginalPaper Pages: 119 - 132

6. On the reaction of methyleneaminoacetonitrile in aqueous media

   • Katsuhiro Kawashiro
   • Kazuhisa Nishiguchi
   • Takayoshi Nara

   OriginalPaper Pages: 133 - 142

7. Pyrophosphate formation from phospho(enol)pyruvate adsorbed onto precipitated orthophosphate: A model for prebiotic catalysis of transphosphorylations

   • Marcelo Hermes-Lima
   • Adalberto Vieyra

   OriginalPaper Pages: 143 - 152

8. The adsorption of nucleotides and polynucleotides on montmorillonite clay

   • James P. Ferris
   • Gözen Ertem
   • Vipin K. Agarwal

   OriginalPaper Pages: 153 - 164

9. Mineral catalysis of the formation of dimers of 5′-AMP in aqueous solution: The possible role of montmorillonite clays in the prebiotic synthesis of RNA

   • James P. Ferris
   • Gözen Ertem
   • Vipin Agarwal

   OriginalPaper Pages: 165 - 178

10. Model of early self-replication based on covalent complementarity for a copolymer of glycerate-3-phosphate and glycerol-3-phosphate

    • Arthur L. Weber

    OriginalPaper Pages: 179 - 186

11. On the trends in protein molecular evolution: Amino acid composition

    • Orlin Ch. Ivanov

    OriginalPaper Pages: 187 - 198

12. Chemical evolution and the origin of life

    • Rose C. Wade
    • Janet V. Powers
    • Cyril Ponnamperuma

    Legacy Pages: 199 - 220

13. IX^th College Park Colloquium on Chemical Evolution Monday–Tuesday, October 30–31, 1989 20th Anniversary Commemoration of Apollo 11 Landing

    First Announcement Pages: 221 - 222