Uarious solutions to the dosimetry problem have been proposed and investigated, but the problem of measuring the amount of energy absorbed biologic materials continues to plague investigators. Several years ago, we developed a technique for measuring the amount of energy an animal absorbs when exposed to microwaves in a cavity arrangement. Recently, we have applied this technique to determine absorbed doses with far-field exposures of rats in an anechoic chamber and with exposures in the multimodel resonating cavity. We compared the biologic effects produced by these two treatment arrangements at equivalent radiation doses. In addition, we determined the accuracy with which physical models of rats could be used for estimating energy absorption by the whole animal in both irradiation arrangements. Title: Behavioral effects of pulsed microwave radiation Source: Annals of the New York Academy of Sciences, Uol . 247, pp. 440-453, February 28, 1975 Authors: Hunt, Edward L.*; King, Nancy W.; Phillips, Richard D.; <Battelle, Pacific Northwest Laboratories, Richland, WA 99352> *Now at Dept, of Microwave Research, Walter Reed Army Institute of Research, Washington, D.C. 20012. Keywords: microwaves, Abstract: Research on microwave bioeffects at our Institution has included investigations of prompt behavioral effects of exposure to pulsed microwaves in the 10-cm region of the spectrum. One series of these experiments was designed to determine the dosage levels that, in association with mild to severe micro- ATTACHMENT : wave heating of the experimental animal, produce prompt degradations in its performance. This paper summarizes the results obtained with three widely divergent forms of behavior: exploratory activity, swimming, and discrimination performance on a vigilance task. Young adult male rats of the Wistar strain (Hilltop Laboratories) were used as subjects in all of these experiments. After suitable preliminary handling and training, each animal was irradiated or sham irradiated with pulsed 2.45 GHz microwaves for 30 min in a multimodal resonating cavity. The performance tests were initiated within 2 min postirradiation and 1 or 24 hr postirradiation. Title: Long-term 2450-MHz CW microwave irradiation of rabbits: methodology and evaluation of ocular and physiologic effects Source: Journal of Microwave Power, Uol. 15, No. 1, pp. 37-44, March I960. Copyright 1980 by IMPI, Ottawa, Canada. All rights reserved. Authors: Guy, A.W.; Kramer, P.O.; Harris, C.A.; Chou, C.K.; <Bioe1ectronmagnetics Research Laboratory, Dept, of Rehabilitation Medicine, Univ, of Washington School of Medicine, Seattle, WA 98195) Keywords: microwaves, Abstract: In order to assess the biological effects of long-term microwave radiation, special exposure systems were developed and used to expose four rabbits to 10-mW/cmA2 microwave radiation (maximum 17 W/kg SAR) for 23 h per day for 180 days. Comparisons with four sham-exposed rabbits revealed no ATTACHMENT : significant effects in terms of eyes, body mass, urinary output, rectal temperature, hematocrit, hemoglobin, white cell count, and basic bloodcoagulation studies. After the experiment, the animals were sent to the National Institute of Environmental Health Sciences for additional analyses which revealed biochemical effects as reported in a companion paper in this issue . Title: Analysis of occupational exposure to microwave radiation Source: Fundamental and Applied Aspects of Non-Ionizing Radiation, Editors: S.M. Michaelson, M.W. Miller, R. Magin, and E.L. Carstensen, pp. 367-375, 1975. Copyright 1975 by Plenum Publishing Corporation. Authors: Czerski, P.; Siekierzynski, M.; <Natl. Res. Inst, of Mother and Child, Warsaw, and Inst, for Postgraduate Study, Military Medical Academy, Warsaw, Pol and) Keywords: microwaves, Abstract: Principles of analysis of environmental conditions and of comparison of various microwave worker groups are discussed. Early and actual findings concerning the health status of microwave workers, published by various Polish authors, are compared and discussed in the light of personal experience. ATTACHMENT : Advantageous effects from enforcement of safety rules may be documented by the comparison of present results with those published ten years ago.
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