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Biomedical subjects

A P Nechaev

Publications and source records attributed to A P Nechaev.

29 records · Page 2Linked to original sources
PubMedDate not supplied

[Dynamics of the bioelectrical activity of human brain during continuous work].

Electroencephalographic parameters can be used to detect early signs of fatigue which is of practical importance. Experiments were carried out on three healthy men to identify a limited number of symptoms allowing a rapid evaluation of operator's work capacity. The subjects were kept in long-term isolation. The study revealed general trends and individual variations in brain bioelectrical activities that reflected their performance during a continuous work with natural sleep deprived for three days.

Adult↗
PubMedDate not supplied

[Change in the sterol and phospholipid makeup during the hydrothermal processing of buckwheat grain].

The effect of different modes of the hydrothermal treatment of buckwheat and of the grit cooking on a change in the composition of sterols and phospholipids was investigated. While not changing the qualitative composition of sterols and phospholipids, the hydrothermal and culinary treatment was found to produce some changes in the correlation of their individual fractions.

Cooking↗
PubMedDate not supplied

[Group and fatty acid composition of the lipids in yeasts of the genus Candida].

The group and fatty acid composition of lipids from 62 species and strains of Candida yeast was investigated. No strict correlation between the group composition of lipids and the yeast species was found but certain consistencies were seen. For instance, C. humicola yeast showed a higher ability for biomass and lipid accumulation. In their group composition triglycerides were predominant while polar lipids + monoglycerides and sterol esters + hydrocarbons were in small quantities as compared to other yeast species. Besides, C. humicola yeast contained no pigments. The C. guilliermondii strains contained low amounts of free fatty acids. The lipid fraction of all C. tropicalis yeast studied contained pigments. The yeast with increased amounts of triglycerides showed a comparatively high content of biomass and lipids. C. guilliermondii yeast had a high content of oleic acid and a low content of linoleic acid. All the yeast contained small quantities of stearic acid.

Candida↗
PubMedDate not supplied

[Alteration of the biologically active substances of a lipid nature during drying of wheat grain].

The influence exerted by the temperature of the wheat grain heating when it is dried in an "elemental" layeron changes in the content of some biologically active lipid-like substances and of the lipids oxidation products was studied. It was made certain that drying at different temperatures of the grain heating tends to produce material changes in the amount of biologically active substances and the lipids oxidation products. There is observed a drop in the content of carotinoids, phospholipids, of the sum-total and individual forms of tocopherols with simultaneous accumulation of the oxidation products. With rising temperature of heating the grain that undergoes drying the said changes become ever more ostensible.

Carotenoids↗
PubMedDate not supplied

[Use of pancreatic lipase for determination of the glyceride composition of rice lipids].

The triglyceride composition of rice lipids was investigated, using methods of thin-layer chromatography, enzymic hydrolysis by pancreatic lipase and gas-liquid chromatography. The major portion of triglycerides were tri- and di-unsaturated glycerides. The content of trisaturated glycerides was not more than 0.86%. The data obtained allow the conclusion that unsaturated acids occupy 2-positions in the triglyceride molecule of rice oil and oil of other plants.

Chemical Phenomena↗