Structure and sorption properties of hypercrosslinked polystyrenes and magnetic nanocomposite materials based on them

Some special habits of dilute solution-grown single crystals were introduced by means of atomic force microscopy (AFM) and transmission electron microscopy (TEM) equipped with electron diffraction (ED). Well-defined block copolymers of poly(ethylene glycol)-block-polystyrene (PEG-b-PS) having predetermined molecular weight and narrow molecular weight distribution (1.06–1.08) were synthesized by atom transfer radical polymerization (ATRP). The single crystals of PEG-b-PS copolymers were grown in a mixed solvent comprised of chlorobenzene/octane and separately in amyl acetate, both using a self-seeding technique. We were capable to develop various growth fronts that resulted from different growth rates through infinitesimal temperature fluctuations. Elevated crystallization temperatures and a higher ratio of molecular weight of PS to that of PEG intensified the curvatures. The corresponding overall, crystalline, and amorphous thickness of a given single crystal, either in square and truncated shapes or with concave and convex lateral sides, had high consistency with each other.     

Tool Wear and Microcrack Formation in the Machining of Medium-Carbon Bearing Steels

Russian Engineering Research - The tool wear and microcrack formation in the machining of medium-carbon bearing steels are studied experimentally for the example of ШХ15-ШД...     

Post-Radiation Radiochemical Analysis of Spent Nuclear Fuel from VVER-440 Reactor

Radiochemistry - Data of destructive radiochemical analysis of the isotopic composition, mass content and, burnups of 12 nuclear fuel samples irradiated in a VVER-440 reactor are reported. The...     

Application of Microwave Plasma Atomic Emission Spectrometry and Hydride Generation for Determination of Arsenic and Selenium in Mineral Water

The ability to determine arsenic and selenium at their maximum acceptable concentrations (MAC) in drinking water via microwave plasma atomic emission spectrometry (MP-AES) and hydride generation is shown in this study. The determination of these elements is possible even in samples with a high degree of mineralization (up to 12 g/L). To provide the required sensitivity of determination of both elements, certain operating modes of the spray chamber for hydride generation are chosen. The conditions for the determination of these elements in mineral and medical-table waters are proposed.     

Study of the behavior of vver and pwr fuel irradiated in the hbwr reactor (halden,norway)

The methods, techniques, and results of comparative studies of VVER and PWR fuel tested in the HBWR reactor (Norway) are presented. Experimental VVER fuel elements with uranium dioxide fuel were fabricated at the Machine Building Plant (MSZ) (in Elektrostal) using standard technology; the experimental PWR fuel elements were fabricated according to the model specifications. The results obtained made possible a comparative evaluation of the changes in the thermophysical parameters and the heat and radiation resistance of the two types of fuel as well as the kinetics of the gaseous fission products as a function of the heat load and burnup.