Two modes of tractor driving--by means of unstepped and frictional turn mechanisms--were compared. The study revealed the advantage of unstepped turn mechanism according to changes of the body functional status.
Two modes of tractor driving--by means of unstepped and frictional turn mechanisms--were compared. The study revealed the advantage of unstepped turn mechanism according to changes of the body functional status.
Effect of the hard manual work on humans using the individual protective means in temperature conditions from 17 to 30 degrees C was studied. The investigation revealed the altered thermoregulatory, circulatory, central nervous systems and the acid-base status. The changes were found depending on the environmental temperature. The recovery period (one-hour rest and shower) did not normalize the disordered functions, so further correction of the functional status is necessary.
Erythrocytes exposed to the ultraviolet (EUV) and electromagnetic (EEM) irradiation in healthy rats and rats exposed to vibration can stimulate humoral immune response to the ram erythrocytes. EEM had immune-stimulating activity higher. Heavy subpopulation of EEM and EUV had immune-stimulating activity, light subpopulation of EUV and EEM weakened the immune-stimulating effect caused by heavy EEM and EUV during vibration.
A sensitive selective method of unsaturated chlorated hydrocarbons detection by means of gas chromatography in skin was worked out. The limits are: for 3,4-dichlorobutene (DCB)-1-0.0024 mu g, for 1,3 DCB-2-0.0027 mu g, for 1,4-DCB-2 (cys)-0.0024 mu g, for 1,4-DCB-2 (trans)-0.0032 mu g, for 2,3,4 trichlorobutene (TCB)-1-0.0093 mu g in analysed volume. The method can be used for the sanitary control of the skin contamination in subjects exposed to DCB and TCB.
The article presents data on the design of sensitive, selective, useful in group analysis method to detect dimethylsulphide, dimethyldisulphide, acetic, propionic, butyric and valeric acids, methyl alcohol and phenol by means of gas chromatography in the air of cellulose sulphate production working zone. The methods were tested in examining the work conditions in Bratsk found-lavage shops.
The authors emphasize the significance of psychological studies in patients with occupational diseases. Foreign and home investigations of the problem are reported. The programme and prospects for the introduction of the methods into practical medicine are presented.
Prophylactic medical examination of workers engaged in the nitrous mineral fertilizers production (NMFP) revealed a group with the premorbid conditions of nonspecific pulmonary diseases. Advanced examination of subjects with premorbid forms of chronic bronchitis showed disorders in immunologic status and markedly changed external respiration parameters in restrictive and obstructive types. The disorders depended on the length of service. Immunologic tests combined with bronchial patency examination were recommended form early diagnosis of nonspecific pulmonary diseases in NMFP workers. Autoimmune reactions to the tracheal and pulmonary antigens play an important role in diagnosis of nonspecific pulmonary diseases.
A more precise method to score the mean temperature of human body exposed to a wide range of heat was worked out. The work produced formula describing the correlation between the changes of mean body temperature and human thermal status, which lets score the degree of overheating and/or cooling from heat content.
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