Document wg4Yn5N9jkrjK6230p27MB8dE

Industrial Hygiene Invest - H Scpicinocr. ; akin from beta-radiation and complete protection against alpha-radiation, (4) control of Ingestion ar.d inkalatiln hazards, (5', elimination o: direct akin contact with radioactive materials. Clothing should preferably be light weight, nonporous, washable or expendable and should provide com* plete body coverage. Leakage at wrist ar.d ankles should be avoided, and at the neck a tight connection should be made to the respiratory protector. Light-colored clothing reflects infrared raidation and thereby minimizes sldn burns. -- Cond. from Authors' Summary 1021 The Concept of a Maximum Permissible Exposure. R. S. Stone. Radiol. 56, 639-661 (May 1952). The history of the knowledge of effects of x-rays on the tissues la-reviewed comprehensively, especially the gradual development of the idea of a maximum tolerance dose. The concept of a maximum permis sible exposure now rests on a fairly large numher of experiments and observations. The present recommendation of the International Commis sion is 0.3 roentgen per week measured in free air, or 0.5 roentgen on the body surface. This refers to x-rays or gamma rays of quantum energy leas than 3 mev. Complete recommendations from the National Committee ' on Radiation Protection will be published soon. The principal effects of radiation are discussed. 1022 Instruments for Measuring Secondary Radiation. V. W. Van Allen. Arch. Ind. Hyg. & Occ. Med. 6. 124-127 (Aug. 1952). The ordinary integrating instruments are not suitable for mea suring the secondary radiation to which patients and operators may be exposed. A specially constructed instrument had been used In the Electronics Laboratory of the Public Health Service, but It has been found that at least one of the many types of radiation-survey meters which are commercially given can readily be converted from a rate meter to an Integrating meter, with provisions for two or more ranges of either type. Full directions for modification are given, with diagrams. 1023 Radiological Contamination of Food. I. G. Poppoff, G. W. Morrison, and F. R. Holden. Food Technol. 6, 278-280 (1952). Atomic or radiological warfare will bring the military forces and civilian population face to face with possible radiological contamination ol food. In this report consideration Is limited to the contamination of food by radioactive particulate matter. Factors influencing the extent of such contamination and the conditions under which food may be safely salvaged are discussed. -- Authors' Summary 1 1 1C