| Ocular Absorption of Laser Radiation for Calculating Personnel Hazards |
30 NOV 1974 |
163 pages |
| Authors:
Edward A. Boettner; David Dankovic; MICHIGAN UNIV ANN ARBOR SCHOOL OF PUBLIC HEALTH
|
 | The transmissions of ultraviolet, visible, and infrared radiation by the cornea, lens, and aqueous humor of rhesus monkeys were measured with spectrophotometers and from this the absorption coefficients were calculated over the spectral range from 200 nanometers in the ultraviolet through 15 micrometers in the infrared. Similar transmission data from previous studies on both human and rhesus monkey eyes were also converted to absorption coefficients. |
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| Effects of Microwave Irradiation on Embryonic Brain Tissue. |
20 NOV 1974 |
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| Authors:
David McK. Rioch; INSTITUTE FOR BEHAVIORAL RESEARCH INC SILVER SPRING MD
|
 | Several groups of dated pregnant rats were exposed starting on the 13th day of gestation in the anechoic chambers or in a calibrated oven. All the exposures to microwave irradiation were conducted after 0700 and before 1500 hours. The rats were sacrificed on the 19th day of gestation, the fetuses weighed and their brained fixed and serially sectioned. No differences were found between the irradiated fetuses and the controls which ... |
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| The Calculation of Absorbed Dose and Tissue Transmission Factors |
11 NOV 1974 |
20 pages |
| Authors:
A. S. Warshawsky; ARMY NUCLEAR AGENCY FORT BELVOIR VA
|
| ;Contents: Interaction between radiation and tissue; Radiation quantities and units; Radiation quality and dose equivalent; History of dose calculations; Tissue transmission factors; Results and limitations. |
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| Infrared Heat Lamps used in Drying Chemical Samples, September-October 1974. |
OCT 1974 |
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| Authors:
David H. Sliney; James K. Franks; Darius Crews; ARMY ENVIRONMENTAL HYGIENE AGENCY ABERDEEN PROVING GROUND MD
|
| A special study of the infrared heat lamps used in the Radiological and Biological Chemistry Division of the US Army Environmental Hygiene Agency to dry samples was conducted during the period September-October 1974. It was concluded that a personnel hazard from infrared radiation did not exist; however, continuous viewing of the light reflected from the planchette exceeds current recommended limits. (Author) |
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| Postirradiation Vomiting. |
OCT 1974 |
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| Authors:
G. R. Middleton; R. W. Young; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
|
| One hundred and twenty-nine male rhesus monkeys (Macaca mulatta) exposed to prompt radiations (neutron/gamma = 0.4 and pulse width = 50 msec) ranging from 700 to 5600 rads (midhead dose) were analyzed for incidence of vomiting. The animals were fasted 18 hours preexposure and observed for incidence of vomiting for two hours postexposure. For doses less than 1000 rads, the number of animals that vomited increased directly with dose. Above ... |
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| Analytical Relationships for Estimating the Effects of X-Rays on Materials. |
SEP 1974 |
|
| Authors:
R. W. Langley; MCDONNELL DOUGLAS ASTRONAUTICS CO-WEST HUNTINGTON BEACH CALIF
|
| The report summarizes analytical relationships derived for estimating the effects of x-rays on materials. The effects covered include energy deposition in single and multiple materials, front-face mass removal structural heating, blowoff impluse, stress generation by impulse loads and thermal loads, stress wave attenuation in undistended and distended materials, and structural response. Optimum energy spectra which maximize an effect for a given fluence are emphasized; however, specific spectra are also treated. ... |
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| Retinal Subthreshold Laser Exposures: Cumulative Effect. |
SEP 1974 |
|
| Authors:
James T. Gallagher; William F. MacKenzie; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX
|
| The possibility of cumulative effect from visible laser radiation was investigated by two methods: Testing for a change in the apparent ED50 after a series of previous subthreshold exposures; histologically examining retinal tissue subjected to various series of subthreshold exposure. Neither method indicated a cumulative effect with a 30-sec interval between doses. (Author) |
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| Ocular Effects of Ultraviolet Laser Radiation. |
SEP 1974 |
|
| Authors:
Joseph Zuclich; TECHNOLOGY INC SAN ANTONIO TEX
|
| The report presents an analysis of ocular hazards from ultraviolet laser radiation. Absorption properties of primate-eye components are reviewed, cellular structure and molecular composition of pertinent ocular layers discussed, and absorption of these layers explained in terms of their molecular properties. Potential sites of ocular damage from various UV-wavelength ranges are identified. |
|
| Aircraft Penetration of Clouds Generated by Nuclear Bursts |
SEP 1974 |
280 pages |
| Authors:
Rayford P. Patrick; George D. Arnett; William A. Yingling; AIR FORCE WEAPONS LAB KIRTLAND AFB NM
|
| Aircraft penetrating radioactive dust clouds are exposed to an environment which could prove to be mission crippling. The performances of the crew of the aircraft, the mission critical electronics equipment, and/or the engines could be degraded sufficiently to compromise the mission completion capability of the aircraft. A detailed examination of the hazards associated with cloud penetrations has been performed. It was found that the major hazards to the crew consist ... |
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| Biological Effects of Microwave Radiation on the Testes of Swiss Mice. |
SEP 1974 |
|
| Authors:
Man M. Varma; Eric Traboulay; HOWARD UNIV WASHINGTON D C BIO-ENVIRONMENTAL ENGINEERING AND SCIENCES RESEARCH LAB
|
| The biological effects of microwave radiation on testicular tissue of 56-65 days old Swiss male mice were studied at 1.7 and 3.0 GHz. The power density and time of exposure varied. At 1.7 GHz and a power density of 10 mW/sq cm for 100 minute exposure, severe changes in morphology were observed. The study indicates that non-ionizing radiation at 1.7 GHz and a power density of 50 mW/sq cm for ... |
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| Threshold Damage Evaluation of Long-Term Exposures to Argon Laser Radiation. |
AUG 1974 |
|
| Authors:
William D. Gibbons; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX
|
| The maculae of rhesus monkeys were exposed to an argon-ion laser operated in the TEMoo continuous wave (CW) mode at a wavelength of 514.5 nm. Damage thresholds (ED50) were determined for exposure times of 0.5, 5, 30, and 120 sec. Retinal damage was assessed at both 1-hr and 24-hr postexposure. With increasing exposure times, a 24-hr threshold criterion resulted in significantly lower threshold values, compared to a 1-hr criterion. Threshold ... |
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| Report on the International Seminar on Radiation Protection, Environment and Population (1st) held in Potsdam on 16-21 Oct 72, |
03 JUL 1974 |
|
| Authors:
E. Ettenhuber; P. Clajus; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
|
| The basic principles of radiation protection and radiohygienic testing of the environment were the central theme of the first day of the seminar. On the second day of the seminar, a total of 11 lectures and many discussions enlarged on the biological fundamentals of radiation protection. The third day of the seminar was reserved for the radiation protection problems due to global fallout. |
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| Measurement of Absorbed Power Patterns in the Head and Eyes of Rabbits Exposed to Typical Microwave Sources. |
JUL 1974 |
|
| Authors:
Arthur W. Guy; James C. Lin; Piro Kramar; Ashley F. Emery; WASHINGTON UNIV SEATTLE BIOELECTROMAGNETICS RESEARCH LAB
|
| The electromagnetic field and power patterns, both in and outside the rabbit's head and eye were established by special measurement techniques while the animals were exposed to a 2450 MHz diathermy 'C' director. These quantitative measurement techniques were extended to include animals exposed to a broad class of radiation sources such as corner reflectors, slots, cavities and horns. |
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| Development of Irradiated Beef. II. Effects of Irradiation Temperature and Dose on the Quality of Roast Beef. |
JUL 1974 |
28 pages |
| Authors:
Gary W. Shults; E. Wierbicki; ARMY NATICK LABS MASS FOOD LAB
|
| A reduction of irradiation temperature to -80C at 4.5 Megarads was sufficient to produce an acceptable irradiated beef roast, when using choice graded beef rounds, chuck and commercial graded loins on the basic raw materials. A comparison of rating for sensory characteristics and preference showed no statistical difference over a one year storage period, except the ratings for mushiness were significantly higher for the knuckle section. Beef irradiated at the ... |
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| Development of Irradiated Beef. I. Acceptance of Beef Loin Irradiated at Cryogenic Temperatures. |
JUL 1974 |
21 pages |
| Authors:
Gary W. Shults; E. Wierbicki; ARMY NATICK LABS MASS FOOD LAB
|
| U.S. Choice beef loin stored for one year showed no difference in the ratings of samples irradiated at -80, -120, -185C when evaluated for sensory characteristics and preference by a technological (expert) panel. Consumer type panelists could not detect any differences in the irradiated samples that could be attributed to the temperatures of irradiation within the temperature range from -40 to -185C. Results of technological panel evaluations obtained for the ... |
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| Annual Research Report 1 July 1973 -- 30 June 1974. |
30 JUN 1974 |
|
| Authors:
ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
|
| ;Contents: Pathophysiological studies of potentially toxic substances; Biological effects of electromagnetic pulses; Suppression of secondary disease by in vitro exposure of mixtures of lymphoid and stem cells to purified antilymphocyte antibody; Endotoxin effects of mouse liver adenyl cyclase; Development of clinical approaches for the treatment of radiation sickness and graft versus host disease through management of the intestinal flora; Control of white cell population in the postirradiated animal; Glycoproteins in ... |
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| Radiation Induced Changes in Intracranial Pressure and Arterial Blood Pressure |
JUN 1974 |
27 pages |
| Authors:
John W. Watters; Louis F. Wailly; Peter B. Carter; AIR FORCE ACADEMY COLORADO SPRINGS CO
|
| Twenty Macaca mulatta monkeys were exposed to cobalt-60 gamma radiation at the rate of 1000 rad/minute for mid-thoracic doses of approximately 1307 rad to 10 monkeys and 2244 rad to the remaining 10 animals. The average intracranial pressure increased in both groups following exposure, but the response observed in the low-dose group was not so great as that elicited in the monkeys that were exposed to higher levels of irradiation. ... |
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| Research on Human Skin Laser Damage Thresholds. |
JUN 1974 |
|
| Authors:
R. James Rockwell Jr.; Leon Goldman; CINCINNATI UNIV OHIO DEPT OF DERMATOLOGY AND LASER LABS
|
| The report gives the results of a two-year study to determine the lowest radiant exposure levels at which the first observable reactions occur on human skin exposed to electromagnetic radiations emitted by normal mode and Q-switched ruby, Q-switched neodymium-glass, carbon dioxide, argon and neodymium-YAG laser devices. The principal goal of the study was to establish the 50 percent probability dose for such minimal reactions observed one-hour post-exposure. Such minimal radiant ... |
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| Criteria for Use of Contaminated Food in Post-Shelter NEOP |
MAY 1974 |
|
| Authors:
William H. Chapman; ENVIRONMENTAL SCIENCE ASSOCIATES FOSTER CITY CALIF
|
| Summaries are presented of selected reports bearing on the problem of fallout contamination of food in both early and long-term post-attack periods. Relevant factors affecting food contamination are discussed in eight appendices, including; fallout deposition; retention of small fallout particles on vegetation; half-life of fallout on plants; retention of large particles on vegetation; determination of radiation dose to man from small fallout particles on plants; comparison of dosage via milk ... |
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| Effect of Co60 Gamma Irradiation on Staphylococcos Aureus, |
23 APR 1974 |
11 pages |
| Authors:
A. Kudryasheva; M. I. Volokhina; I. S. Emelyanov; ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA
|
| The sensitivity of staphylococcus aureus to gamma radiation of varying dose rates in a nutrient broth and in a phosphate buffer solution, with and without glucose, was studied. Twenty-four-hour-old microorganisms were irradiated with doses of 20,40,60, 80, 100,200,300,400 and 500 krad at dose rates of 4 and 400 rad/sec. An increase in dose rate within the limits studied was found to produce a more effective reduction in number of germs. ... |
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| High Altitude Radiation Exposure in the SR-71: A Preliminary Report |
APR 1974 |
23 pages |
| Authors:
Rufus M. DeHart; AIR WAR COLL MAXWELL AFB AL
|
| A study to measure radiation received by SR-71 crews at high altitudes began at Beale AFB, California in 1971. Data gathered during the first eighteen months are presented. Radiation was measured by a thermoluminescent dosimeter provided by the USAF Radiological Health Laboratory (AFLC). |
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| The Effect of Neutron Irradiation on the Structure and Mechanical Properties of Carbon Fibres |
MAR 74 |
19 pages |
| Authors:
B. J. Wicks; AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
|
| The effect of fast neutron irradiation on the mechanial and microstructural properties of carbon fibres heat treated to various stages of graphitization has been investigated. Changes in selected crystallinity parameters were used to monitor the microstructural disorder induced in each fibre by three different irradiation doses. Associated changes in fracture strength and Young's modulus are related to the dependence of dislocation mobility on short range microstructural damage. |
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| Biomedical Aspects of Nonionizing Radiation. |
MAR 1974 |
|
| Authors:
William C. Milroy; NAVAL WEAPONS LAB DAHLGREN VA
|
| The report consists of the proceedings of a one-day Symposium on Biomedical Aspects of Nonionizing Radiation held on 10 July 1973 at the Naval Weapons Laboratory, Dahlgren, Virginia in conjunction with the opening and dedication of the new Biomedical Research Laboratory. It includes a compilation of six invited papers presented at the Symposium by leading authorities in the fields of bio-engineering, comparative biology, human exposure factors, high power pulses, and ... |
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| Ocular Damage Thresholds for Repetitive Pulsed Argon Laser Exposure. |
FEB 1974 |
|
| Authors:
William D. Gibbons; David E. Egbert; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX
|
| The maculae of rhesus monkeys were exposed to radiation from an argon-ion laser operated at a wavelength of 514.5 nm in the TEMoo mode. Damage thresholds were determined for exposure to a single 40 microsec pulse and for different pulse train lengths and repetition rates of 40 microsec wide repetitive pulses. The single pulse threshold was determined to be 2.0 micro J. Thresholds for repetition rates of 100 and 1000 ... |
|
| A Study of Electronics Radiation Hardness Assurance Techniques. Volume II, Part 2. Electrical Screening for Ionizing Radiation Rate and Total Dose Effects. |
JAN 1974 |
149 pages |
| Authors:
I. Arimura; Allan H. Johnston; L. L. Sivo; D. W. Egelkrout; BOEING CO SEATTLE WASH
|
| The electrical screening approach examined correlations between certain initial electrical parameters and the radiation sensitivities of the devices. The correlation parameters were selected on the basis of physical reasoning and the radiation sensitivities were defined differently for the various radiation environments. Ionizing radiation rate hardness assurance is treated with subdivision determined again by the various classes of devices. MTBF results are also discussed for parts subjected to ionizing rate tests. ... |
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| Quantitation of Microwave Radiation Effects on the Eyes of Rabbits at 2450 MHz and 918 MHz. |
JAN 1974 |
|
| Authors:
Arthur W. Guy; James C. Lin; Piro O. Kramar; Ashley F. Emery; WASHINGTON UNIV SEATTLE BIOELECTROMAGNETICS RESEARCH LAB
|
| Studies on the microwave cataractogenic effects have been going on for many years. Despite the multitude of published information on the mechanism and time and power density threshold, very few of these papers present sufficient quantitative results useful for the purpose of extrapolation to man and, subsequently, establishment of safe human exposure guides. The present project was designed to ascertain the conditions and mechanisms of cataract production in laboratory animals ... |
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| Mortality in Rats Exposed to CW Microwave Radiation at 0.95, 2.45, 4.54, and 7.44 GHz. |
JAN 1974 |
|
| Authors:
P. Polson; D. C. L. Jones; A. Karp; J. S. Krebs; STANFORD RESEARCH INST MENLO PARK CALIF
|
| Dose-response (lethality) data have been obtained for rats exposed frontally to CW microwave radiation in the frequency range 0.9 to 8 GHz. Approximately 1400 male rats of the Sprague-Dawley strain have been exposed groups to four separate frequencies: 0.95, 2.45, 4.54, and 7.44 GHz. Power density levels have ranged from approximately 0.2 W/sq cm to 12 W/sq cm, and lethal exposure durations from approximately 10 sec to 300 sec. Gross ... |
|
| Unified Range Spectrum and LET Distribution for HZE Particles of Galactic Radiation in Space, |
14 DEC 1973 |
26 pages |
| Authors:
Hermann J. Schaefer; NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
|
| A unified range spectrum for the flux densities of HZE particles of galactic radiation in space is presented for establishing the individual spectrum for any Z number with a simple scaling procedure. Data on Z abundances are presented and the Z spectrum from Z = 2 to 28 is divided into four classes. Range spectra for the class representatives are derived. The influence of the geomagnetic cutoff on the range ... |
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| Continuous Exposure of Rodents to 10 to the 8th power Pulses of Electromagnetic Radiation. |
DEC 1973 |
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| Authors:
S. J. Baum; W. D. Skidmore; M. E. Ekstrom; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
|
| The experiment tests the hypothesis that rapid rises and falls of electric and magnetic fields would adversely affect vital ionic and electrochemical processes at the molecular level in biological systems. Rodents were exposed to 10 to the 8th power pulses from the AFRRI electromagnetic pulse (EMP) simulator which provides five pulses per second with a peak electric field intensity of 447 kV/m, a 5-nsec rise time and 550-nsec 1/e fall ... |
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| Military Field System for Intraoral Fluoroscopy at Low Level X-Ray Exposures. |
25 SEP 1973 |
|
| Authors:
Bhim Sen Savara; James Wesley Irwin; William L. Parker; OREGON UNIV DENTAL SCHOOL PORTLAND BIOPHYSICS LAB
|
| An intraoral fluoroscopy system has been designed and developed under U.S. Army sponsorship. The system provides real-time and instant replay x-ray images at a radiation exposure on the order of 500 times less than that required for exposure of a dental x-ray film. Radiation reduction is accomplished by use of an electronic image intensifier and a video disk recorder with stop action capability, while the intraoral application is made possible ... |
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| Bone Marrow Response of Beagles to Fractionated Doses of Mixed Gamma-Neutron Radiation. |
SEP 1973 |
|
| Authors:
J. E. West; F. A. Mitchell; S. R. Jones; J. Witz; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
|
| Male beagles were bilaterally exposed to mixed gamma-neutron radiation from the AFRRI-TRIGA reactor. The dose rate was 20 rads/minute for all irradiations and midline tissue doses were 215 rads, 225 rads and 240 rads. At each dose approximately one-half of the animals received a single irradiation while the others were given one-fourth the dose each day for 4 consecutive days. The objective of this study was to determine if doses ... |
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| Comparison of the 60-Day Mortality Responses of Lambs and Adult Sheep after Unilateral Exposure to Cobalt-60 Gamma Radiation. |
SEP 1973 |
|
| Authors:
Stanley G. Spangler; Carl T. Olson; AIR FORCE WEAPONS LAB KIRTLAND AFB N MEX
|
| Fifty-three lambs and 24 adult sheep were exposed unilaterally (right side) to potentially lethal doses of cobalt-60 gamma radiation (200 to 500 R, midline air dose). The incidence of mortality during the first 60 days post-exposure was recorded and analyzed. The median lethal dose (LD-50) for the lambs was 347 R, and the slope of the probit regression line was 22.24 probits per decade increase in dose. For the adults ... |
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| Delayed Match-to-Sample Performance Decrement in Monkeys Following Cobalt-60 Irradiation. |
10 AUG 1973 |
|
| Authors:
Alfred Bruner; Victor Bogo; Robert K. Jones; LOVELACE FOUNDATION FOR MEDICAL EDUCATION AND RESEARCH ALBUQUERQUE N MEX
|
| The report presents findings on the behavioral effects of Cobalt-60 gamma irradiation on monkeys performing a complex delayed match-to-sample (DMTS) task or a simpler visual memorization task. It was found that the DMTS group reflected clear performance decrement at lower doses (e.g., several hundred rads midbody) than previously reported, while the memorization animals tended to show either no decrement or, in a few cases, response cessation (i.e., early transient incapacitation). ... |
|
| Radiobiology of Large Animals. |
AUG 1973 |
|
| Authors:
David C. L. Jones; John S. Krebs; STANFORD RESEARCH INST MENLO PARK CALIF LIFE SCIENCES DIV
|
| Hematologic changes occurring during and after complex sequences of low-dose-rate exposure of sheep to gamma radiation (Cobalt 60) have been evaluated. Erythrocytic values were depressed early in the irradiation sequence, with further gradual depression after cessation of exposure. Leukocytic values decreased in a stepwise fashion during the irradiation sequence, with the patterns of decrease and post-irradiation recovery dependent on the particular parameters of radiation exposure. Studies of bone-marrow cell kinetics ... |
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| CW Neodymium Ocular Damage Threshold Study. Interim Report on 1-Second Exposure Duration. |
AUG 1973 |
|
| Authors:
David J. Lund; Charles T. Carver; William E. Zwicker; FRANKFORD ARSENAL PHILADELPHIA PA
|
| A continuous-wave neodymium laser, operating at 1.06 micron has been incorporated into an animal exposure facility to enable the determination of the threshold for damage to ocular tissue at this wavelength for a range of exposure durations. Using Rhesus monkeys, the damage threshold has been determined for 1-second exposure duration and minimal retinal spot size. Damage was produced at exposure levels above 42 millijoules total intraocular energy (TIE). The ED50 ... |
|
| Annual Research Report 1 July 1972 - 30 June 1973. |
30 JUN 1973 |
|
| Authors:
ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
|
| The report describes, in brief summary, the scientific accomplishments of the Armed Forces Radiobiology Research Institute (AFRRI) for the period 1 July 1972 to 30 June 1973. During this report period, the AFRRI has broadened its research program from one primarily limited to operational problems in radiation biology to one which includes a number of critical biomedical problems of direct interest to the Surgeons General of the Military Departments. The ... |
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| Microwave Reflection, Diffraction and Transmission by Man. A Pilot Study. |
11 JUN 1973 |
13 pages |
| Authors:
Vernon R. Reno; Dietrich E. Beischer; NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
|
| Field patterns were measured for the first time in proximity to human subjects exposed to low intensity cw microwave fields at 1 GHz. Pronounced standing waves were observed on the illuminated side and distinct shadows produced on the opposite side of the subjects. The fine structure of the interference patterns was related to the polarization of the incident wave. The field perturbations described have implications in evaluation of the radiation ... |
|
| Biological Effects in Rodents Exposed to Pulsed Electromagnetic Radiation. |
JUN 1973 |
|
| Authors:
W. D. Skidmore; S. J. Baum; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
|
| Rodents were exposed to electromagnetic pulse (EMP) radiation to test the hypothesis that rapid changes in electric and magnetic fields would induce injuries in biological systems with high cell turnover rates. It was observed that the reticulocyte count in exposed rats was nearly always greater than in approximately 1 hour daily for biological sampling and animal care during 20 weeks. Biological assays were periodically conducted in exposed and nonexposed animals ... |
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| Theoretical and Experimental Studies of Microwave Induced Cataracts in Rabbits. |
JUN 1973 |
|
| Authors:
Piro Kramar; Ashley F. Emery; Arthur W. Guy; James C. Lin; WASHINGTON UNIV SEATTLE BIOELECTROMAGNETICS RESEARCH LAB
|
| Power deposition patterns, temperature distribution patterns, and cataractogenesis thresholds have been established in the eyes of rabbits exposed to localized near zone 2450 MHz radiation. There was good agreement between results obtained through theoretical and experimental approaches. |
|
| Effect of 2450 MHz Microwave Fields on Peripheral Nerves. |
JUN 1973 |
|
| Authors:
C. K. Chou; Arthur W. Guy; WASHINGTON UNIV SEATTLE BIOELECTROMAGNETICS RESEARCH LAB
|
| There was no significant change in characteristics of nerves exposed to CW and pulsed 2450 MHz fields in a waveguide filled with temperature-controlled Ringer's solution. Absorbed power densities varied from 0.003 to 1.7 W/cc for CW and 0.3 to 30 W/cc peak for pulsed fields. |
|
| Microwave Interaction with the Auditory Systems of Humans and Cats. |
JUN 1973 |
|
| Authors:
Arthur W. Guy; Eugene M. Taylor; Bonnie Ashleman; James C. Lin; WASHINGTON UNIV SEATTLE BIOELECTROMAGNETICS RESEARCH LAB
|
| Recordings from elements of the auditory system of cats in response to pulsed microwaves, as well as determinations of thresholds of audibility of humans to the pulses indicate that an auditory sensation may be elicited by pulse energies greater than 20 microjoule/square centimeter, regardless of average or peak power. |
|
| Some Biological Effects of Microwave Irradiation in the Rat. |
MAR 1973 |
35 pages |
| Authors:
T. Daryl Hawkins; H. Mark Grove; Thomas W. Heiple; John Schrot; WALTER REED ARMY INST OF RESEARCH WASHINGTON D C
|
| The report describes two major experimental efforts performed by the Microwave Research Department, Walter Reed Army Institute of Research, Walter Reed Army Medical Center. The first study examines the lethal effects of 3000 MHz exposures in rat. The second study, which was performed concurrently with the first, examined behavioral performance decrements in rat as a function of both wavelength and power density. The lethality study indicated that more total energy ... |
|
| Linear Programming for Telegammatherapy of Bronchogenic Cancer (Lineinoe Programmirovanie pri Distantsionnoi Gammaterapii Bronkhogennogo Raka), |
22 FEB 1973 |
|
| Authors:
N. N. Dyatlova; NAVAL RESEARCH LAB WASHINGTON D C
|
| The levels of permissible doses in the healthy lung, spinal cord, skin and cardiac muscle have been determined by studying the literature sources on radiation injuries of the chest. Using diagrams of body sections at the level of the tumor, the author has placed limits on the presumed 'hot' areas of the dose field. An electronic computer was used to make the optimal selection of numerous possible decisions. The article ... |
|
| The Relative Effectiveness of Fission Neutrons for Gastrointestinal Damage in Mice: Jejunal Crypt Stem Cell Survival. |
FEB 1973 |
|
| Authors:
G. H. Zeman; S. R. Jones; R. E. George; S. G. Levin; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
|
| Mice were unilaterally irradiated in either a fission neutron or gamma ray field at various dose rates. Jejunal crypt stem cell survival was analyzed by the multitarget single-hit survival model, which yielded excellent fitting survival curves. At the 1 percent survival level, gamma rays were found to be 20 percent more effective in destroying cells when delivered in a brief pulse of radiation than when delivered at lower dose rates ... |
|
| Effect of a Supralethal Dose of Radiation on the Blood-Brain Barrier, |
FEB 1973 |
|
| Authors:
A. A. Rene; J. L. Parker; J. H. Darden; N. A. Eaton; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
|
| Sprague-Dawley rats were subjected to a whole-body dose of 15 krads of mixed gamma-neutron radiation. Following irradiation, the animals were intravenously injected with horseradish peroxidase (HRP) and sacrificed. The medullae of these animals were fixed either by perfusion or by immersion, incubated in a substrate medium and processed for electron microscopic examination. In control animals subjected to the same procedures, the reaction product of the enzyme HRP and its substrate ... |
|
| Agricultural Vulnerability to Nuclear War. |
FEB 1973 |
|
| Authors:
Stephen L. Brown; Hong Lee; James L. Mackin; Kendall D. Moll; STANFORD RESEARCH INST MENLO PARK CALIF
|
| The report presents the results of the Workshop on Survival of Food Crops and Livestock in the Event of Nuclear War, held in Front Royal, Virginia, on October 17-19, 1972. Results included delineation of the status of research and research requirements in the following fields: livestock vulnerability, crop vulnerability, ecological and environmental disturbances and effects, radiation constraints on operations (radiation denial), agricultural production system relationships, salvage, damage assessment, and operational ... |
|
| The Performance of Primates Following Exposure to Pulsed Whole-Body Gamma-Neutron Radiation, |
JAN 1973 |
|
| Authors:
C. R. Curran; R. W. Young; W. F. Davis; ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
|
| Eighty-eight monkeys (Macaca mulatta) were trained to perform a shock motivated visual discrimination task and were exposed to a single supralethal dose of pulsed gamma-neutron radiation. The postirradiation performance of these animals is presented in a manner which facilitates group comparisons of performance following doses of approximately 1100, 1700, 2600, 4900, 8900 or 15,200 rads. At these dose levels, group performance declined within minutes after exposure. For some subjects, the ... |
|
| Physical and Radiobiological Investigations on Artificial Earth Satellites, |
26 DEC 1972 |
|
| Authors:
E. E. Kovalyov; A. V. Kolomenskii; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
|
| The monograph presents experimental materials obtained on Earth orbiting space ships and data from the literature, summarizing physical and biomedical research in space. Results of research concerning the radiation environment in orbits of Earth orbiting space ships are presented. The principles of calculation of permissable radiation doses are given and physical protection of space ships is discussed. Radiation dangers are evaluated, using the permissable levels of cosmic radiation for man ... |
|
| Radiation Effects in Man: Manifestations and Therapeutic Efforts. |
DEC 1972 |
|
| Authors:
Eugene L. Saenger; Edward B. Silberstein; Bernard S. Aron; Harry Horowitz; James G. Kereiakes; CINCINNATI UNIV OHIO COLL OF MEDICINE
|
| Section 1 of this report presents the results of whole- and partial-body radiation given to 85 adults with far advanced cancer and three children with Ewing's sarcoma between 19 February 1960 through 31 August 1971. These studies fall into Phase I (is the treatment toxic) and Phase II (is the treatment effective but with no controls). In patients with carcinoma of the colon metastic to liver, survival after one to ... |
|
| Cardiac Pacemaker Electromagnetic Interference (3050 MHz). |
DEC 1972 |
20 pages |
| Authors:
William D. Hurt; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX
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| Tests were performed to determine the effect of 3050 MHz radio-frequency radiation on cardiac pacemakers. Five pacemaker models were implanted in large dogs and tested in each of two laboratories. The electrocardiographs of each animal were continuously monitored for various exposure conditions. Most of the pacemakers exhibited some electromagnetic radiation interference (EMI) under certain conditions of these tests. The most sensitive unit, of those tested, cut off at approximately 100 ... |
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RADIATION DOSAGE
