No abstract

No abstract

No abstract

Components (information, program, technical information) technologies of strain-gauge experimental research of models of flight vehicles in the wind tunnels, realized on the basis by means developed by authors and methods and as their suitability and efficiency for the solution of design problems is shown, are considered.

A method for studying cells based on low-angle light scattering was applied to cell volume and cell signaling studies on Ehrlich ascite tumor cells (EATC). Changes in the volume of EATC were measured in hypotonic medium, as well as after activation with exogenous ATP, ionomycin and thimerosal. Increase of [Ca2+]iunder ATP and ionomycin action induced reversible changes of cell volume: fast shrinking was followed by swelling. Thimerosal caused a reversible change in EATC volume with high amplitude; endoplasmic reticulum played the key role in this response. Having obtained kinetic parameters of changes in cell volume under activation of the cells, quantitative measurements of K+, Na+and anion flows responsible for this process can then be obtained. In spite of some fundamental differences in the behavior of cells of different dimensions there are many similarities, and there is a good theoretical background for dealing with both small and large cells.