Development of 3D Models of Knits from Multi-Filament Ultra-Strong Yarns for Theoretical Modelling of Air Permeability.

The work is devoted to the study of the geometric parameters of a knitted loop. It has been found that the optimal model is a loop model detailed at the yarn level, which considers the change in the cross-sectional shape and sets the properties of the porous material in accordance with the internal porosity of the yarn. A mathematical description of the coordinates of the characteristic points of the loop and an algorithm for calculating the coordinates of the control vertices of the second order spline, which determine the configuration of the yarn axes in the loop, are presented in this work.

[Microbiological monitoring of the microbic strain stability to antibacterial preparations in surgical in-patient clinics].

While performing of microbiological monitoring, conducted in surgical stationaries of Dnepropetrovsk, of 775 cultures, isolated during one year from patients and outer space, the S. aureus cultures were revealed, resistant to methicillin were 23.6%, to gentamycin 12.

[Clinical endoscopic and pathomorphologic study of the stomach in vibration disease].

The authors present results of manifold evaluation of stomach in 109 patients with vibration disease caused by various vibration characteristics. The evaluation covered clinical signs, laboratory studies, endoscopic and pathomorphologic methods with light and electronic microscopy, in vitro radioautography and morphostereologic analysis. Features of gastric disease in vibration disease are asymptomatic course, depressed gastric secretion, prevalent atrophic changes of mucosa on endoscopy.

[Isolation of Yersinia enterocolitica in various conditions of cultivation].

The rates of Yersinia isolation from 156 samples of pathologic material cultivated by two methods, the routine one, with the selection of Yersinia from a microbial association by prolonged cooling of the examined material in slightly alkaline buffer and multiple inoculations into Endo's medium, and the technique suggested by the authors--a rapid method based on the treatment of the biologic material with a concentrated alkaline-salt mixture at 4 degrees C for 2 days and a single inoculation into inhibiting selective medium. Use of the rapid method has increased the isolation rate of Yersinia 4-fold, cut down the time of the investigation 2-3-fold, reduced the cost and simplified the technique of analysis.