[Some aspects of damage to the heart in intercurrent exposure to dust and high air temperature].

Albino male rats were exposed to inhalation dusting with rock dust containing 29% free silicon dioxide over eight months at air temperature 37-38 degrees C. It has been ascertained that combined bodily exposure to dust and high ambient temperature promotes the development of prominent hypertrophy and hypoxia of the myocardium, activation of the lipid peroxidation processes, resulting in an appreciable degree of morphological changes in the cardiac tissue. It is suggested that the above changes might be a reflection of development of myocardial dystrophy originating in insufficiency of energy supply to the cardiomyocytes, that can lead to the development of cardiosclerosis of dystrophic genesis.

[On mechanisms underlying bronchial obstruction in chronic dust bronchitis in workers of deep coal mines].

Healthy miners demonstrated increased relative levels of lysophosphatidyl choline and especially phosphatidyl inositol subunits. Metabolism of the latter could result in membrane accumulation of inositol triphosphate leading to cytoplasmic calcium increase and to bronchial smooth muscles contraction. Oral 20% choline chloride solution lowers bronchospasm in dust bronchitis patients with decreased serum subunits of phosphatidyl inositol and increased serum levels of phosphatidyl choline.

[The diagnostic value of the extreme inhibition of the processes of blood lipid peroxidation].

The measuring of the blood serum content of lipid peroxidation LPO products permits giving a possible prognosis of the illness. A striking decline in LPO activity is indicative of an apparent inhibition of processes of vital activity and suggests to us a possibility of a fatal outcome.

[Dynamic surface tension of blood in chronic dust bronchitis in coal mines workers].

Chronic dust bronchitis in miners is associated with increase in dynamic surface tension of blood at short (t = 0.01 s) and medium (t = 1 s) surface lifetimes with lower declination angle of interphase tensiograms curve. Surface tension disorders were similar to those in experimental dust bronchitis.

[Pulmonary surfactant status in experimental dust-induced bronchitis based on the data from dynamic interphase tensiometry].

The disease was simulated by inhalation of dust containing 29% of free silica in Wistar male rats during 8 months. One group of the subjects was kept under 26-28 degrees C and other one--under 38-40 degrees C. Dynamic surface tension of lung tissue homogenate was studied by means of computer tensiometer MRT (Lauda, Germany).