Modified version of dissolving suture material on the basis of glycol cellulose ethers: a histological study

Investigation of manufacturing of home-produced dissolving suture material was conducted. Influence of the material on tissues in the region of threads location and on the organism as a whole was studied up. The material resolved actively, did not cause pathological changes in surrounding tissues and in general pathological processes in the organism of animals. During 180 days the majority of the suture material quantity have resolved.     

Fatigue crack in large-scale tubular joints for offshore structures

Tubular members have been used for constructing offshore structures. Large-scale fatigue tests of welded tubular K-joints under the balanced in-plane bending brace were carried out to investigate the fatigue behavior of API 2W Gr.50 steel produced by POSCO. The experimental results were verified by numerical approaches and compared with the IIW, DnV RP-C203 and API RP 2A-WSD design curves. The test results based on the hot spot stress were in agreement with the design curves. The SCF factor for tubular K-jo...     

Investigation of the propagation of an ultrasound pulse in a dispersed fractal medium

Results are presented of an experimental determination of the fractal parameters of crushed sand particles. Results of measurements of the propagation of an acoustic pulse through a mass of sand having various degrees of dispersion are used to determine the fractional exponent in the dependence of the propagation velocity on the ultrasound wavelength. A wave equation in fractional derivatives is proposed to describe the propagation of ultrasonic waves in a dispersed medium. Pis’ma Zh. Tekh. Fiz. 25, 14–18 (June 12, 1999)