[Determination of polyphenolic complex in wines by electrochemical methods and using the enzymes tyrosinase and laccase].

Several red wines were studied to find a correlation between physicochemical parameters characterizing the antioxidant status of wine and total content of phenols in samples. The content of dissolved oxygen (its value varied from 0.75 to 3.

[Activity of the sympathetico-adrenal system in humans during modeling of weightlessness].

The state of the sympathico-adrenal system (SAS) before and during three days of suited immersion was investigated in six male subjects on the basis of renal excretion of adrenaline (A), noradrenaline (NA), dopamine (DA) and DOPA according to Vasilyev. Computer-aided analysis of the experimental data by the method of principal components showed that the SAS was functionally stressed in all subjects. Suited immersion that simulated hemodynamic, metabolic and vestibulo-motor effects of microgravity helped to distinguish between men with sustained and lowered capabilities of the SAS which are largely determined by the A-, NA-, and mixed type of its function.

[Composition of the water obtained after its sanitary and hygienic use by men and women].

The composition of wash water used by men and women was investigated. The results were exposed to multifactorial statistical analysis using the method of principal components. The investigation allowed the following conclusions to be made: 1) wash water used by men and women is comparable in composition; therefore the sex of the crewmembers of space vehicles can be disregarded when designing water reclamation systems; 2) three parameters, viz.

[Occupational work capacity and functional status of an operator during repeated exposure to optokinetic and antiorthostatic forces].

It has been shown that optokinetic stimulation that elicits sensory-autonomic manifestations of motion sickness and head-down tilt that simulates fluid redistribution in the cranial direction decrease professional abilities of the operator even after he has developed good skills. Repeated exposures to optokinetic stimulation or head-down tilt have some training effect. However, control tests that include both optokinetic stimulation and head-down tilt give evidence that their training effect is not adequate.