[Study of Ralstonia eutropha culture producing polyhydroxyalkanoates on products of coal processing].

Kinetic indices of growth, polyhydroxyalkanoate (PHA) accumulation, and gas exchange have been studied in a culture of the carbon monoxide-resistant hydrogen strain Ralstonia eutropha B-5786 grown on a gaseous substrate (GS) obtained by lignite gasification. The GS was shown to be suitable for PHA production. To increase the degree of GS consumption, various modes of gas supply to the culture were tested.

[Kinetic parameters of a culture of the hydrogen-oxidizing Ralstonia eutropha, grown under the regimen of biosynthesis of polyhydroxybutyrate].

Kinetic parameters of a culture of the hydrogen-oxidizing bacterium Ralstonia eutropha, grown on a gas substrate under the conditions favoring autotrophic biosynthesis of polyhydroxybutyrate, were studied. The following parameters, making it possible to control and optimize the process in industrial situations, were determined: specific rate of substrate consumption, physical properties of culture medium, and coefficients of heat emission and mass transfer.

[Hemorrhage from esophageal varices].

Bleeding from varicose veins (VV) of the esophagus remains a serious therapeutic problem to date. From experience in operative treatment of 164 and nonoperative management of 33 patients the authors discuss the modern trends of the treatment of this disease. New drugs are applied to reduce pressure in the portal system, on the one hand, and new operative techniques are studied, on the other.

[Comparative studies of peptic ulcer in the active stage with and without hemorrhage].

100 patients with gastric peptic ulcer and 100 patients with duodenal peptic ulcer in an active with well expressed pain syndrome were studied clinically and gastroscopically. These two groups of patients were compared by several indices with a group of 81 patients with gastric peptic ulcer and 243 patients with duodenal peptic ulcer admitted to hospital because of acute bleeding from the ulcer. All patients were examined endoscopically with a fibroscope "Olimpus--GIF--Q 10".

[Endoscopic diagnosis of malignant tumors of the esophagus].

The results from 1389 fibroesophagoscopies in case of various esophageal diseases are reported. The diseases, in 57.6 per cent of the examined, are admitted to be precancerous.

[Reflux esophagitis (clinical and endoscopic studies)].

The results from the esophagoscopies of patients with esophagitis are reported. The diagnosis esophagitis was made in 238 patients (17.5%) out of the 1389 esophagoscopies performed.