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Circadian adjustment and stress in operators under fast rotating 12-hour shifts

Vangelova, K.

Central European Journal of Public Health 8(4): 229-232

2000

ISSN/ISBN: 1210-7778
PMID: 11125977
Document Number: 522622
The aim of the investigation was to follow the time-of-day variations of some circadian and stress indicators during fast rotating 12-hour shifts. The study covered twenty-one male operators in thermoelectric power plant aged 35.7 +/- 8.5 years. The time-of-day variations of 6-sulphathoxymelatonin (aMT6s), the main melatonin metabolite, 11-oxycorticosteroids (11-OCS), catecholamines and oral temperature were followed during the 2nd day shift and two consecutive night shifts. The aMT6s was determined by RIA and the 11-OCS and catecholamines by fluoriphotometric methods. Moderate general activation and daily oriented circadian rhythms of aMT6s, 11-OCS and oral temperature were found in the investigated operators. The night shiftwork showed significant impact on melatonin peak values at fast rotating 12-hour shiftwork.

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