Preface. 1. Electron Spin Resonance Investigations of Free Radical Toxicology; R.P. Mason. 2. Application of Electron Spin Resonance - Spin Trapping (EPR-ST) to the Demonstration of Biologically Relevant Free Radicals; A. Kozlov, et al. 3. 31P Labeled Cyclic Nitrones: A New Class of Spin Traps for Free Radicals in Biological Milieu; S. Barbati, et al. 4. EPR Studies of Fenton-Type Reactions in Copper-Peroxide Systems; B.C. Gilbert, et al. 5. Factors Controlling the Addition of Carbon Centered Radicals to Alkenes and Alkynes; H. Fischer. 6. Exploring Iron-plus-hydroperoxide-based `Oxygen Activation' Systems. Or: It's Hard to Keep a Good Radical Down! I.W.C.E. Arends, et al. 7. Hypersensitive Probing for Radicals in Cytochrome P-450 Hydroxylations; M. Newcomb, M.H. Le Tadic-Biadatti. 8. Mechanisms of the Oxidation of Alkylaromatics and Aromatic Sulfides by Cytochrome P-450 and Peroxidases; E. Baciocchi, et al. 9. Mechanisms of Oxidation of Hydrocarbons, Lipids and Low Density Lipoproteins: N.A. Porter, et al. 10. Radicals in Aqueous Solution from Fe(III) Complexes with Macrocyclic Ligands Containing Phenolates; J.M. Hockertz, et al. 11. Ion Radicals and Free Radicals in the Processes of the Electrochemical Conversion of CO2, SO2, NO and Freons to Valuable Organic Products; V.D. Pokhodenko, V.G. Koshechko. 12. The Photochemical Approach to the Functionalization of Alkanes; M. Mella, et al. 13. Bond Dissociation Energies of Phenolic and Amine Antioxidants; G.F. Pedulli, et al. 14. Dihydrolipoic Acid and Coenzyme Q, Two Natural Compounds with Pro-and Antioxidation Function; H. Nohl, et al. 15. Antioxidants Dihydropyridines, a New and Comprehensive Therapy for Free Radical Induced Cardiovascular Diseases; G. Gaviraghi, et al. 16. Indolinic and Quinolinic Aminoxyls as Biological Antioxidants; L. Greci, et al. 17. Extremely Efficient Antioxidants Evolved into Environment from aging Polymeric Materials: Chemiluminescent Monitoring; V.A. Belyakov, et al. 18. Radicals Derived from Amino Acid and Protein Hydroperoxides. Key Mediators in Protein Damage? M.J. Davies. 19. Molecular Pathology of Oxidative Damage Induced by the Myeloperoxidase System of Activated Phagocytes; J.W. Heinecke. 20. Chemistry and Biochemistry of DNA Radicals; B. Giese, et al. 21. Free Radical Chemistry Associated with C-1' Position of Nucleosides and Nucleic Acids; C. Chatgilialoglu, T. Gimisis. 22. Free-Radical Mechanisms of Action of UV and Laser Radiation on Human Blood Cells and Tissues; Y.A. Valdimirov. 23. Free Radical Reactions in Mechanisms of Damage, Repair and Protection of Blood Systems; M.K. Pulatova, V.L. Sharygyn. 24. Radiation-Induced Free Radical Fragmentation of Cell Membrane Components and the Respective Model Compounds; O.I. Shadyro. 25. Aspects of Nitric Oxide Chemistry and Biochemistry; H.G. Korth, R. Sustmann. 26. Nitrites and Nitrates as Exogenous Sources of Nitric Oxide in the Animal Organism; A.F. Vanin. 27. Free Radicals in the Atmosphere: The Motor of Tropospheric Oxidation Processes; K.H. Becker, et al. 28. Degradation of Atmospheric Pollutants by Tropospheric Free Radical Reactions; H. Gusten.