An automated cryostat temperature control system for low-temperature galvanomagnetic measurements has been proposed. The automated system works autonomously with a microcontroller. A system for controlling the power of the heater in the thermostat is operated by the means of pulse-width modulation. The automated control system is based on standard equipment and it is easily available for practical application.
This article provide the concept of cold chain, define the purpose of development, key elements and stages of organizing refrigeration circuit. The share of perishable products in total domestic retail trade is revealed. The development of the national cold chain is regarded from the standpoint of implementation of intelligent systems for monitoring of perishable goods in real time.
In this paper the results of recent studies on the application of lower critical solution temperature (LCST) phenomena of polymer solutions to the surface modification of flat and spherical substrates are reported. It has been found that controlled polymer deposition can be achieved at temperatures exceeding LCST. The obtained polymer coating exhibits a peculiar surface morphology and, if particles are introduced, can be highly effective in pigment dispersions stabilizing.