[Effect of antioxidant therapy on indicators of free radical activity in workers at risk of lead exposure].

The authors administered to 36 workers exposed to lead, for four weeks the preparation Prolong which contains vitamin C, vitamin E, beta-carotene, selenium, zinc and chromium and investigated the effect on indicators of free radicals. A statistically significant increase of the following occurred: superoxide dismutase (p < 0.001), glutathione peroxidase (p < 0.

[Indicators of effects of free radicals in workers at risk of lead exposure].

The authors examined indicators of the action of free radicals in 40 workers exposed to the risk of lead (work with lead containing glazing and prints). The lead concentration in the atmosphere did not exceed the highest permissible concentrations and the biological exposure tests as regards lead exposure did not exceed the highest permissible limits. In the examined subjects the authors found a significantly elevated level of superoxide dismutase activity (p < 0.

[Determination of free radical activity in workers at risk for styrene exposure].

The authors examined indicators of the effect of free radicals (MDA, SOD, GSHPx, selenium) in 38 workers exposed to styrene. They revealed a statistically significant (p < 0.01) correlation of SOD activity and the period of exposure to styrene and also a statistically significant correlation (p < 0.

[Free radial activity in patients with pneumoconioses].

The authors examined indicators of the effect of free radicals (MDA, SOD, GSHPx, selenium) in 20 patients with notified simple silicosis or miner's pneumoconiosis, in 11 patients with complicated silicosis or miner's pneumoconiosis and in 10 patients exposed to fibrogenic dust without an X-ray finding of pneumoconiosis. No statistically significant differences between individual groups were found. Subsequent investigations should be focused on subjects with incipient pneumoconiosis who are not yet entitled to damages.