Physical properties and biocompatibility of UHMWPE-derived materials modified by synchrotron radiation.

The applications of synchrotron radiation (SR) in medical imaging have become of great use, particularly in angiography, bronchography, mammography, computed tomography, and X-ray microscopy. Thanks to recently developed phase contrast imaging techniques non-destructive preclinical testing of low absorbing materials such as polymers has become possible. The focus of the present work is characterization and examination of UHMWPE-derived materials widely used in medicine, before and after their exposure to SR during such testing.

[Asthenic disorders and cognitive dysfunction in patients with tension headache].

The article is devoted to the study of cognitive dysfunction in patients suffering from tension headaches. Patients had attention and memory dysfunction, higher levels of anxiety, asthenia and subclinical symptoms of depression. The high efficacy of cerebrolysin in the restoration of cognitive dysfunction confirmed by the data of clinical, psychological and neuropsychological studies was shown.

[Chronic tic disorders in children and adolescents and their treatment with adaptol].

We examined 162 patients, aged from 10 to 15 years, with tic hyperkineses. Transient and chronic tic disorders were observed in 82 and 80 patients, respectively. The relationship of clinical features, frequency, psychological and encephalographic characteristics of the patients with age-at-onset was studied.

[Efficacy of cortexin in the treatment of memory disorders in children].

Children, aged from 7 to 12 years, with memory disorders were treated with cortexin (30 patients) and encephabol (30 patients). The comparative evaluation of efficacy and safety of these drugs was carried out. The higher cortexin efficacy (the improvement in 86.

[The effect of millimeter-range electromagnetic and of ionizing radiation on the body and thymocytes of mice and rats].

Radiomodifying effects of ultra-high frequency electromagnetic radiation (UHFER) were studied using laboratory mice and rats, as well as irradiated rat thymocytes in vitro. The resistance of mice to lethal effects of X irradiation was increased by preceding UHF treatment at 7.1 mm wavelength.

[Effect of acceleration on pilot-sportsmen during aerial performances].

Cardiovascular responses of sports-pilots to aerobatic maneuvers have been inadequately studied. However many Soviet and foreign authors believe that acceleration effects may seriously deteriorate pilot performance. Our study has shown that cardiovascular changes are to maintain the necessary level of blood pressure in brain and eye arteries.

[Characteristics of the G-loads in sports stunt flying].

Thirty well-qualified flying sportsmen, aged 22-42, who performer 210 aerobatic flights onboard a sporting airplane Yak-50, were examined, using an automatic monitoring system. The flyers were exposed to +9 Gz and -6 Gz as a maximum the duration of which was 10 s and 5 s, respectively. The onset rate varied from 0.

[Lower-body negative pressure tolerance of pilots with hypertensive-type neurocirculatory dystonia].

Cardiovascular function and LBNP tolerance were studied in 68 pilots with hypertensive neurocirculatory dystonia and 26 healthy test subjects (controls). The studies demonstrated that most dystonic subjects had distinctly peculiar features of cardiovascular compensatory reactions during LBNP tests and that 86.8+/-4.

[Tolerance of +Gz accelerations in chronic compensated cardiac muscle disease].

The functional potentialities of the cardiovascular system were investigated during an exposure of people with compensated chronic diseases of the cardiac muscle to acceleration (+Gz). The test subjects were exposed to acceleration of 3 and 5 g for 30 sec with an interval of 5 min. The parameters of hemodynamics, ECG and visual perception were recorded.