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Kh Deianov

Publications and source records attributed to Kh Deianov.

6 recordsLinked to original sources
PubMed1995

[An occupational physiology study at the Asarel Mining and Milling Works. The evaluation of the work load in the basic jobs in an open-pit mine].

This occupational physiology study was undertaken within a wider applied-research framework designed to evaluate the occupational environment and its impact on workers at "Asarel" Mining and Milling Works. Analysis of activities showed physical effort (dynamic and static) to be the major problem at the open pit, though varying in extent between jobs (most prominent for blasters and bulldozerists). Nervous/emotional strain, while not leading, was sustained mostly by diggers and blasters, followed by drivers. Organization of work (shift regimen, no regulated breaks, stepwise schedule of days off work) was hardly appropriate and did not allow for recovery. Interviewed workers qualified working conditions as extremely unfavorable; they disapproved with the physical factors of the occupational environment, the workplace, the state of machines and devices, and remuneration for work performed. Exertion from work, assessed by pulse rate and energy expended, was moderate for most activities of diggers, drivers, and drillers. The burden of physical effort was great for blasters at the open pit and for diggers and drillers performing extra repair operations (pulse rate, 100-110 strokes/min; energy expended, 5.2-5.5 Kcal/min). Hardest and least attractive was the work of blasters at stores for explosive materials (pulse rate, 120-141 strokes/min; energy expended, 5.5-6.5 Kcal/min). These adverse factors of labor activities might produce a negative impact on worker health and performance, leading to occupational impairment of their musculoskeletal system, to labor-related disorders of their cardiovascular and nervous systems, etc. Preventive measures are thus necessary to limit physical exertion, optimize the work-and-rest regimen; also, there is a need for conducting pertinent preventive medical examinations, providing social measures (conditions for transportation, rest, nutrition, sports), etc.

Adult↗
PubMed1995

[Chronic occupational stress and the cardiovascular risk in teachers].

Age changes in arterial pressure (AP) and incidence of arterial hypertension (AH), as well as probability of developing IHD, were compared between school teachers and a control group sustaining no excessive occupational stress. The investigated teachers, numbering 168, were from Sofia public schools and technical schools. The control group consisted of 103 women: office employees, designers, research workers, etc. Findings indicated teachers to have a closer age relationship to AP level, compared to controls. Considerable increase in systolic AP was observed after 45 years of age, and there was a significant difference between the first and the second halves of the 4th decade. Diastolic AP was also higher in teachers than in controls. Duration of teaching experience proved to be strongly correlated with systolic and diastolic AP levels (r = 0.56, p < 0.001; and r = 0.50, p < 0.001). Beyond 40 years of age, teachers showed a high incidence of AH, 31%. The group as a whole was at high cardiovascular risk.

Adult↗
PubMed1994

[An evaluation of the strain in the work of teachers].

Psychophysiological studies on teachers' work include generally the evaluation of occupational stressors influencing the work load and strain and the assessment of transient and long-term changes in teachers' functional state and health due to these stressors. Results from investigations of some changes in the functional state of the organism of female teachers working in secondary and technical schools of different profiles were presented in this study. The following parameters were applied: subjective feeling of fatigue, heart rate [HR], excretion rates of 11-oxycorticosteroids (11-OCS), adrenaline (A) and noradrenaline (NA) during work. According to the mean HR values during work a moderate cardio-vascular strain was obtained (HR between 80-90 beats) min. Transient HR values over 100 beats/min were registered during periods connected with specific stressful working conditions. The levels of 11-OCS and the catecholamines excretion rates also indicated a moderate job strain. More pronounced changes in 11-OCS, NA and A were found when teaching in the upper classes of the secondary and technical schools. Significant correlations were established between the changes of HR, 11-OCS, NA and A and some individual characteristics of the examined persons, such as: age, length of service, HR at rest and level of neuroticism. Our data reveal the usefulness of the indices and procedures applied for the evaluation of teachers' strain at work.

11-Hydroxycorticosteroids↗
PubMed1991

[The assessment of physical work capacity and its dependence on the occupational and individual risk factors of jobs with hypodynamia and neuropsychic stress].

The physical work capacity is studied in representatives of 3 professions with decreased motor activity and neuropsychic stress: managers in industry (20), railway controllers (41) and machine-builders (107). The dependence of the physical work capacity on the age, type of work, physical activity during free time, and other biometric and individual characteristics on the examined persons were studied. The physical working capacity was measured in standard laboratory conditions by bicycle ergometer [correction of veloergometer] Lano at submaximal rates of loading 50, 100 and 150 watt with duration 2 min each and velocity of pedalling 60 r/min. The maximal working capacity (MWC) was measured directly by continuous loading increase to refusal. The results pointed out ineffective reaction of the cardiovascular system at dosage of physical effort (increase of the "normative" values of the pulse rate for respective loading with 5 to 15 beats/min with all examined groups). The aerobic capacity level is under the average, as most unfavourable are its values in the managers from the industry, followed by the railway controllers and machine-builders. Hypodynamic during work, combined with low physical activity during free time, are basic risk factors for the maximal working capacity and the cardio-vascular system. There is a dependence of the aerobic capacity on some individual characteristics (age, body weight, pulse frequency and blood pressure at rest, etc.).

Adult↗
PubMed1989

[ECG changes in persons representing present-day professions].

Subject of the study are the two up-to-date professions with well expressed neuropsychic stress and hypodynamia: 19 managers from industry and 41 controllers from the railway transport. Both professional groups were subject to a definite dose of physical loading and estimation of the ECG changes by the aid of Minnesota's code (WHO 1968) and its modification by the Swedish Cardiological Association. Relatively high percents of positive working samples for healthy middle-aged men were found, which could be related with considerable occupational risk in both professions.

Administrative Personnel↗