Original scientific paper In this paper, the results of investigations of the temperature field distribution and tool wearing during C60 steel turning are presented. Abrasive wear resistance tests were carried out for cutters made of low-alloy high-speed steel. Steel samples were heat treated, and then were subjected to ion nitriding, TiN coating, or to complex treatment. The influence of cutti...

There is growing evidence that TNF-alpha and its two receptors play an important role in hormonal regulation, metabolism, inflammation and cancer. The biological effects of TNF-alpha are mediated by two receptors, p55 and p75. The aim of this study was to analyze serum concentrations of p55 and p75 and hormonal status in healthy women during the normal menstrual cycle. Eight women aged 20-22 wi...

In aquaculture, new production technologies are under development and testing. One promising type of technology is the closed floating cage. Egget® one these newly developed technologies, which egg-shaped vertically floating. challenges to determine hydrodynamic loads. Therefore, this study focuses on estimating resistance coefficient for steady flow with various velocities Reynolds numbers a s...

there are evidences in both animal and human studies which show that exercise has beneficial effects on the central nervous system and cognition. so, the aim of this study was to investigate the effect of resistance exercise on memory and probable mechanisms of this effect (i.e. neurotrophic factors) in sedentary students. 30 sedentary students (mean age, 23.8±1.6 yr) were randomly divided into...

Micromachined silica microchannel plates ~MCPs! under development have a number of advantages over standard glass MCPs and open completely new possibilities in detector technologies. In this article we present the results of our studies on the thermal properties of silica microchannel plates ~sMCPs!. Similar to standard glass microchanel plates the resistance of silica MCPs was measured to chan...