Biological Aspects of Radiation Protection: Proceedings of the International Symposium, Kyoto, October 1969

ISBN-13: 9783540053255 / Angielski / Miękka / 1971 / 274 str.

T. Sugahara; O. Hug

Opis

In the maintenance and development of sound standards of radiation protection, many types of enquiry are important. These range from the purely technical examination of the ways in which exposure may occur or radionuclides may enter the body under existing or new conditions of occupational activity, to the most fundamental studies of the interaction of high energy particulate radiation with matter or the metabolic localisation and kinetics of unfamiliar radionuclides. One of the most important, and most basic, problems, however, is to establish a quantitative estimate for the frequency with which various types of injury would be induced in man following exposure to low doses of radia- tion delivered at low dose rates. No sound limits can be proposed for appropriately safe levels of occupational or population exposure unless the associated hazard-or its maximum likely value-can be at least approximately assessed. It is one of the most important tasks of those concerned with radiation protection that these criteria should be kept under constant review in the light of developing knowledge, and that the fields in which further information is needed should be defined and described.

Spis treści

General Review of Biological Aspects of Radiation Protection.- Problems of Protection against the Genetic Effect of Radiation.- Radiation Risk and Protection (with Reference to Recent ICRP Reports).- Radiation Effect on Prenatal Development.- Comparative Late Effects in Mice Following Fast Neutron or Cobalt 60 External Irradiation Versus Tritiated Thymidine Internal Irradiation.- General Discussion.- Hematological and Cytogenetic Effects of Radiatio.- Hematological Effects of Partial Body Irradiation: Clinical and Experimental Data.- Hematological Effects on Heavily Irradiated Japanese Fishermen.- Cell Population Kinetics in Thymus Lymphocytes under Continuous Irradiation.- Radiation-Induced Chromosome Aberrations in Lymphocytes: Possible Biological Dosimet in Man.- Some Hematologic Changes Due to Ionizing Radiations.- Feasibility of Cytogenetic Assay in Radiophosphorus Dose Assessment.- General Discussion.- Chemical Protection in Mammals.- Radiation Protection of Non-Specific Body Defence: Reticuloendothelial System and Adrenal Cortex.- Mode of Radioprotective Action of Aminothiols in HeLa S3 Cells.- Radioprotective Effect of Methylene Blue in Mice and Rats.- Radioprotective Effects of Adenosine Derivatives.- Chemical Radie-protection with N- and S-Containing Polymers.- New Potentialities of Combination of Radioprotection and Cyclophosphamide.- Histopathological Action of Serotonin on Certain Tissues in Mice.- Comment and Discussion.- Fundamentals of Radiation Protection and Recovery.- Chemical Protection and Cell Structure.- Metabolism of Ehrlich Ascites Tumor Cells under “Anoxia” and Its Implication in the Rejoining of X-Ray-Induced DNA Strand Breaks.- Chemical Protection of the Recovery Process.- Cysteamine and Radiation-Induced Single Strand Breaks of DNA in Cultured Mammalian Cells.- Comparative Individual Radiosensitivity and its Cellular Explanation.- Animal Survival and Cell Survival Seen in Dose Rate Effects on Mouse Intestinal Damage.- Mortality of Fish under Continuous Irradiation Conditions.- Relationship between Metabolism and Radiosensitivity.- Medical Aspect of Chronic Hypoxia in Radiation Exposed Glomerulus in Hamsters Treated with Injected Ozone Gas.- Low Dose Effects of X-Rays on Electrophoretic Mobility of Human Erythrocytes.- On Mechanisms of Chemical Radioprotection.- Comparative Radiosensitivity of Ascites Ovarian Tumors and Ascites Lymphosarcoma of Rats.- General Discussion.- Closing Remarks.- List of Participants.- Authors Index.- Subjects Index.