الملخص

ABSTRACT The Present study included determination of the effect of high temperatures and continuous long exposure on some biochemical and physiological variables. Healthy males (170) workers, whom occupationally, exposed for a daily long period high temperature during their work in the ovens. The exposure periods were less than (5) years, (5-14) years, (15-24) years and more than (24) years for (75) workers from the Cement Factory Ovens, (40)worker from Bakeries and Ovens, (28) worker from Metallurgy factory ovens and (27) worker from Iron and Steel factory ovens. Also blood samples were collected from (40) volunteers (university students and administrators) as a control group. The study showed the effect of high temperatures on some biochemical variables in serum of the studied groups. The heat exposures showed significant decrease in their total protein and cholesterol content, while blood urea increased significantly with the increasing of exposure period. The results also revealed a significant increase in the enzyme activity of transaminases (Alanine aminotransferase "ALT" and Aspartate aminotransferase "AST" ) as compared to control group.