Hydrogen peroxide: Control of its content in water objects

A brief review of existing methods designed to determine hydrogen peroxide in aqueous media has been presented. Particular attention has been given to biosensor devices enabling us to exercise simple and express control of concentration of the specified compound.     

Effect of the Treatment Temperature on the Surface Drying Set of Sugi Boxed-Heart Square Timber

High-temperature and controlled humidity treatment before drying has proven to be highly effective in preventing surface checks by forming drying sets in the surface layer of boxed-heart square timber in Japan. In this study, we examined the differences of the surface drying sets on sugi timber under different treatment temperatures. As a result, the width of a surface check after drying was much smaller at a treatment temperature of 120°C than at 80°C, and this indicates that the drying set with 120°C treatment would be larger than that with 80°C treatment. Also we observed that treatment temperature had a greater effect on the drying set as the drying advanced.     

New high-efficiency low-waste technology at the Vyksa Metallurgical Plant for operating metallurgical equipment with the use of Kompaks® monitoring systems

Introduction of the BER? KOMPAKS® automated system at the Vyksa Metallurgical Plant to safely and efficiently manage the operation of the plant’s equipment has allowed the facility to begin operating that equipment based on real-time evaluations of its actual physical condition. Introduction of the new system has also allowed better coordination of repair-scheduling with ongoing production operations, significantly improved the reliability and readiness of the equipment for operation at 100% capacity, completely eliminated the human factor from the process of monitoring the condition of equipment, and made it possible to check the quality and timeliness of equipment maintenance and repair work so as to ensure safe, efficient operation of the entire production complex.     

Electrochemical properties of composite materials based on graphite and vanadium disilicide

Electrodes with different composition were prepared by the method of pressing followed by sintering of the graphite and vanadium disilicide powders, and their electrochemical and corrosion properties in water solutions of electrolytes were studied.Translated from Inzhenerno-Fizicheskii Zhuraal, Vol. 52, No. 5, pp. 802–707, May, 1987.     

Economic evaluation of long-distance hydrogen transmission by chemical closed-loop cycle

All over the world there are enormous unexploited renewable energy reserves (hydro, geothermic, solar, wind, etc.). Most originate far from the location of the users, so their exploitation would greatly benefit from the disclosure of new, more economical, and technically feasible transmission systems.A possible alternative to electricity is the use of hydrogen as a medium for transportation of energy. This work proposes a chemical closed-loop cycle based upon catalytic reversible reactions as a means to transmit hydrogen. A real example for the application of the proposed system for transportation of secondary energy was considered. In particular, choosing a large hydro-electric source as reference, a comparison was made between costs and efficiencies in transferring energy as hydrogen (in its different forms) over long distances, with respect to transportation of the same energy as electricity.