[Several results of a theoretical analysis of radiation injuries].
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Biomedical subjects
Publications and source records attributed to I G Akoev.
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The effect of 800 mHz microwaves of 0, 3, 5, 7, 16, and 30 Hz modulation on GABA receptor concentration in rat brain cortex has been investigated. Irradiation of the whole body at a modulation frequency of 16 Hz readily decreases the GABA receptor concentration. Irradiation at other modulation frequencies is ineffective. Irradiation of the whole body modulated at 16 Hz with various exposure times (5, 15 and 60 min) has revealed the highest effect at 5 min, while at a longer exposure the effect decreases.
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A study was made of the effect of gamma-radiation on binding of muscimol, a GABA agonist, by synaptic membranes of rat brain cortex. Exposure to 2 Gy radiation was shown to reduce [3H]-muscimol binding to membranes.
It was shown that exposure of rats to microwaves (800 MHz, 16 Hz modulation, 1-3 mW/cm2) decreased muscimol binding with synaptic membranes and reduced acetycholinesterase activity in the rat brain.
Using the liposomes prepared from dimyristoyl lecithin at temperature below that of phase transition, its was shown that the annealing of liposomes by 340- and 800-MHz microwave radiation required less integral heating of the samples, than it should be expected from the experiments on heating the samples in a thermostat.
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A study was made of the inductive-resonance energy transfer between chromophore pairs, tryptophan--pyren, tryptophan--1.8-anilinonaphthalene sulfonate (ANS), puren--1.8-ANS, diphenylhexatrien--ethidium, and 1,8-ANS--ethidium, in irradiated (250 Gy) and nonirradiated preparations of erythrocytic membranes. The radiation--induced decrease in the energy transfer was noted in the pairs in which one of the chromophores was localized in a lipid phase. On the basis of the data obtained it is suggested that irradiation of membranes causes the lesions in them which lead to a reduction of the effective thickness of a hydrophobic part of the lipid bilayer.
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