Effect of Nontraditional Additives on the Processes of Silicate and Glass Formation

The results of studying the effect of nontraditional additives, namely, metallic aluminum and zinc powders on the process of silicate and glass formation using polythermal and thermogravimetric analysis, are described. The specifics of the glass-melting process for decorative glasses using the nontraditional additives are considered. __________ Translated from Steklo i Keramika, No. 5, pp. 7 – 10, May, 2005.     

Effect of S-1 heat-stabilizer on the physicomechanical properties of complex polyester yarns

Conclusions It has been shown that the use of the industrial S-1 thermostabilizer in the synthesis of polyethylene terephthalate aids in obtaining high molecular polymer with an improved thermal stability and an increased degree of crystallinity.The effect of S-1 thermostabilizer on the physicomechanical properties complex polyester yarns has been studied. It has been found that with time, the complex yarns obtained undergo structural changes which lead to a decrease in the initial strength characteristics.Institute of Physicoorganic Chemistry, Academy of Sciences of Byelorussia. Mogilevskii Khimvolokno PO. Translated from Khimicheskie Volokna, No. 2, pp. 41–42, March–April, 1992.     

Migration of artificial radionuclides in the water stream of the Yenisei River

The distribution of artificial radionuclides between size fractions of the suspended matter in the bulk of the water stream of the Yenisei River near the Mining and Chemical Combine discharge sites was studied. The majority of radionuclides in the region of the discharge site were found to occur in the form of soluble salts or colloids with the particle size smaller than 0.2 μm. With an increase in the distance from the discharge site, the radionuclides undergo redistribution with the formation of coarser suspended particles due to coagulation. This fact was confirmed by mathematical simulation.     

Redistribution of residual stress in plasma-sprayed coatings

A mathematical model is proposed for the residual-stress redistribution in plasma-sprayed coatings on melting.     

Distribution of the residual tritium content in organs of <Emphasis Type="Italic">Carassius gibelio</Emphasis> (Prussian carp) freshwater ray-finned fish

The distribution of residual tritium in organs of Carassius gibelio (Prussian carp) freshwater rayfinned fish as a representative of the Carassius phytophagous genus of Cyprinidae family was studied for determining the ³Н accumulation in the aquatic plants–fishes food chain in water bodies contaminated with radionuclides. In the first step, tritium was accumulated by 3000 g (wet weight) of the aquatic plant biomass in aquaria of 100 L volume with the specific water activity of 100 kBq L^–1. The aquatic plants were shown to actively take up the introduced tritium, accumulating up to 70% of the radionuclide. The content of tritium bound to organics in the biomass increased to 21% of the whole accumulated tritium. After that, the plants (Ceratophyllum, Lemna) were dried and mixed with dry fish fodder (1: 1), and the mixture was pressed in granules. The activity of each granule was up to 50 Bq. These granules were used for forced feeding of fishes, so that each individual took up in the course of the 550-day experiment up to 330 kBq of tritium. According to the analysis results, about 75% of the whole amount of the accumulated tritium was present in muscle tissues. Determination of the tritium content of proteins and lipids in the experimental systems revealed no differences in the use of Ceratophyllum and Lemna as fodder.     

Assessing External Defects at Manufacturing Enterprises

Russian Engineering Research - A method is outlined for calculating the components responsible for external defects in manufacturing. A classical quality-control tool is employed to analyze the...