Table of Contents. Preface.- Biography of Vladimir A. Shevchenko. Biography of V. Ivanovich Korogodin. Part I - Nikolay Wladimirovitch Timofeeff-Ressovsky: the Man and the Scientist. (1900-1981). Timoffeef-Ressovsky: A Short Account of his Life; V. Babkoff.- From the Mutation Theory to the Theory of the Mutation Process; S. G. Inge-Vechtomov.-N.V.Timofeef-Ressovsky's views as the Basis of Radioecological Studies; I. Molchanova et al.- Living Matter and Biospherology; G.V. Guegamian.- Part 2 - Nuclear Accidents and Weapons.Radioecological Assessment of the CHNPP Accident in the Western Europe and Adjacent Area, with Special Reference to the Modern Problems of Radioecology in the Mediterranean;A.A.Cigna.- Dose Rates and Effects of Chronic Environmental Radiation on Hydrobionts within the Chernobyl exclusion Zone; D. Gudkov et al.- Effects of Contaminant Exposure on Plants; S. A. Geras'kin et al.- Variability and Viability of Seed Plant Populations around the Nuclear Power Plant; V. L. Korodina et al.- Radiosensitivity of Chromosome Apparatus of Voles from Alienation Zone of Chernobyl's Accident; 0. A. Kovalova, T. T. Glazko.- Strategy of Biological Radiation Protection of Biota at the Radionuclide contaminated Territories; LN.Gudkov.- Population-Genetic Consequences of the Ecological Catastrophe (Chernobyl `s Example) .- V.L. Glazko.- Principles and Results of Genetic Monitoring of Chemical Mutagens and Radiation Effects in Armenia; R. Aroutiounian.- Estimation of Somatic Gene Mutageness in Patients with Benign Tumors Living in Radiation Contaminated Regions with different 137Cesium Density; A. Zamulaeva et al.- Radiological Health Effects 20 Years after the Chernobyl Accident: Data of the National Radiation and Epidemiological Registry; V. Ivanov, A.Y. Tsyb.- Casualties and Radiation Dosimetry of the Atomic Bombings on Hiroshima and Nagasaki; T. Imanaka.- Part 3 - Radiation Effects - the Environment . Radioecology: History and State-of-the-Artat the beginning of the 21st Century; R.M.Alexakhin.- Low Dose Radiation Effects in the Environment: Is the Fear or the Science Irrational?; C. Seymour, C. Mothersill.- Radiocapacity: Characteristic of Stability and Reliability of Biota in Ecosystems; Y. Kutlakhmedov et al.- Tritium in Water Systems of Ural Region; M. Chebotina, O. Nicolin.- The Problem of Multiple Stressors including Low Doses of Radiation in the Environment; C. Mothersill, C. Seymour.- Part 4 - Radiation Effects - Humans. Directed Evolution of Mankind and Biosphere; I. Popov.- Assessment of Radiation Genetic Risk in Man; V.A. Shevchenko.- Targets, Hits and Tracks; J. Kiefer.- Radiation Cytogenetics: The Color Revolution; M. Durante.- The Minimum Detectable Dose by Biodosimetry in a Radiation Overexposure; D.C. Lloyd, A.A. Edwards.- A Simple Method for the Evaluation of Side Doses in Radiotherapy; A.A. Cigna.- Part 5: Mutations. Mutation and DNA Repair: From the Green Pamphlet to 2005; J.W. Drake.- Canalization and Evolvability: Tempering the Effects of Mutation in a Changing Environment; K. McManus et al.- Effects of Chronic Low-Level Irradiation on Radiosensitivit of Mammals: Modeling and Experimental Studies; O. Smirnova and M. Yonezawa.- Prolonged Environmental Stress Induces Mutations and Provides Nonspecific Adaptation of Drosophila Populations; I.B. Mosse et al.- Modulation of Mutation Rates and Adaptation of Bacteria; I. Matic.- Nuclear Cytoplasmic Interaction Hypothesis and the Role of Translocations in Nicotiana Allopolyploids; A. R. Leitch et al.- Molecular Dynamics Study of Radiosensitive Mutant Allele of Protein Kinase ycdc28-srm [G20S] using hcdk2 as Model; D. Kretov et al.-Genome Reconstitution in the Extremely Radiation Resistant Bacterium Deinococcus Radiodurans; J. R. Battista and M.M. Cox.- List of authors .