[Evaluation of iron metabolism in workers exposed to led compounds in a tile glaze factory 1981-1982].

The investigations have been aimed at an estimation of the iron balance in lead-exposed workers. The investigations were carried out in a group of 20 men producing lead glazes and a control group of 23 Medical Academy students. Lead concentration was found to be remarkably higher in the exposed group, as compared to the controls.

The effect of methylbromophenvinfos (Polfos) on some enzymes in vivo and in vitro. I. In vivo studies.

The experiment was carried out on Wistar rats receiving orally either oil or oily solution of methylbromophenvinfos (Polfos) either in a single dose of 0.5 LD50, or doses of 0.1 LD50 once daily for a period of 2, 4 or 6 weeks.

Investigations on the modification of postirradiation pancreatic lipase activity by some endo- or exogenic factors. Part II. The influence of some ions, biogenic amines and hormones.

The subject of investigations was the influence of some endogenic substances: ions (K+ and Ca++), amines (serotonin, histamine and acetylcholine) and hormones (hydrocortisone and glucagon) on the lipase release from pancreatic granules (zymogen and lysosomes) of control and irradiated rats (800 R=24 hours). The decrease of enzyme release under the influence of hydrocortisone (both concentrations: 10(-6) and 10(-8) M), Ca++ ions, serotonin, histamine and acetylcholine after their administration in greater concentration (10(-6) M) was stated. Smaller concentrations of these substances evoked the transitory enhancement of enzyme activity.