[Changes in reactions in rats during hypokinesia and electromagnetic irradiation of ultrahigh frequency]. / Zminy reaktsiï orhanizmu shchuriv na hipokineziiu pry diï elektromahnitnoho vyprominiuvannia nadto vysokykh chastot.

The effects of low intensity electromagnetic fields (EMF) on the hypokinetic stress were studied on rats. It has been shown that exposure to EMF, combined with hypokinesia or without it, prevented the typical stress reaction on the limited motility. EMF was determined to modify the adaptive processes which resulted in the adaptive activation and limiting stress reaction. Adaptation was characterized with lower anxiety and excitability of the central nervous system, and a higher level of non-specific resistance, as compared to the stress reaction.

[The stress-modulating effects of laser therapy in IHD patients]. / Stress-moduliruiushchie éffekty lazeroterapii u bol'nykh IBS.

Dependence of the response to helium-neon laser therapy (LT) on initial level and changes of blood plasma hydrocortisone (HC), testosterone (T), diene conjugates (DC) concentration, general antioxidant activity (AOA) of blood plasma, TxB and 6-keto-PGF were estimated in 147 patients with ischemic heart disease and stable angina. The response to LT was observed in patients with high levels of HC, T, AOA and 6-keto-PGF1 alpha. A significant increase of DC was noted in these patients too. The minimal level of HC. T and AOA was recorded in patients with negative clinical effect. The treatment only aggravated HC, T and AOA deficiency and raised DC and TxB level. The findings suggest that the effect of LT is based on modulation of nonspecific adaptive mechanisms.

[The stress-limiting action of pulsed infrared laser radiation]. / Nekotorye aspekty stress-limitiruiushchego deistviia impul'snogo infrakrasnogo lazernogo izlucheniia.

Experiments were carried out on male rats to study molecular background of stress-limiting effect of impulse infrared laser radiation (0.89 mu). The motor cortex was subjected to 4.8 W local impulse laser radiation with an impulse length 10(-8) sec, 3000 Hz base frequency and 10 Hz modulating frequency during 10 minutes. The following data were estimated: DNA synthesis in the cells of the cortex, skeletal muscles and thymus recorded by 3H-thymidine inclusion in nuclear DNA, 11-OCS content in blood plasma. It was revealed that IR radiation stimulated DNA synthesis in all the examined tissues of intact animals and animals after proactive physical load (swimming). The preliminary laser radiation was an effective stress-limiting factor for the cortex and thymocytes of swimming rats, but did not prevent decreasing 3H-thymidine inclusion in muscles' nuclear DNA initiated by swimming.

Effect of a mild dose of X-irradiation on rats under stress.

This investigation was apt at studying the effect of a mild dose of X-rays on the normal and shock administered rats. Administration of stress brought about a marked depression in the contents of DNA, RNA and protein in the brain. On the other hand, total body exposure to X-rays was found to increase the levels of DNA, RNA and protein in the brain. Thus, the use of a mild dose of X-rays in stressed animals seems to be stimulatory to the diminished levels of DNA, RNA and protein in the brain. There were rising levels of 5-hydroxy indol acetic acid and Vinyl mandelic acid in the urine of stress administered rats and the enhanced levels of these urinary metabolites appeared to be refractory to the application of X-rays.