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Radioactivity and life. YK Kudrytski (MD) 1971 Part 8.

Radioactivity and life. YK Kudrytski (MD) 1971 Part 8.Enlarge


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This dose is 20 million times more than the minimum, which is registered under the action of reaction. "
Another great biological range has vidimyn light. The human eye is able to adapt to changing light millions of times. Approximately the same range of action has pirogenal - a substance that causes the temperature rise
temperature during fever (PZ Butsnitskaya, 1963). "
In evaluating the dose range of biological ~ eistviya ionizing radiation should be noted chrezvychaino important of its properties: it is an obligate, that is mandatory, unavoidable condition for the existence of life on Earth.
The entire amount of the properties of ionizing radiation as a biological stimulus suggests that it yav.chya: tsya stimulus special, having specificity deistviya and provocative, as is known, the development of specific radiation reactions and radiation syndromes.
At the same time, the properties of ionizing radiation just "drazhitelya are not exclusive, priauschimi only one ex. These same properties, and many other Sci ~ cally active agents. Specificity of the same biological deistviya ionizing radiation is, as seen from above, in only her inherent combination of changes caused by it, as well as in degree. Hence ~ y no reason to expect that the response of organisms to ionizing radiation deistvie be fundamentally different, are not subject to the general biological laws.
BASIC PRINCIPLES RESPONSES OF LIVING 'action of ionizing radiation
In response to radiation irritation develops second phase of the biological effects of ionizing radiation - the reaction of the organism, which runs continuously. For small magnitude of radiation effects, it is in the nature of the physiological adaptive response, while at large - there is a pathological process, which is the clinical manifestation of radiation sickness or other radiation injuries.
The biological effect depends on the magnitude of radiation exposure. We can distinguish four main forms of response of the organism as a function of radiation exposure.
By the natural level of ionizing radiation adapted organisms. Radiation exposure in excess of natural levels of ionizing radiation to the maximum allowable, cause the development of adaptation responses that can counterbalance the condition of the body with the changes occurring under the influence of this level of exposure. At the same time the following-


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