Synthesis of Nanosized Oxides by Thermal Decomposition of Citrate Precursors

The paper describes the citric acid aided synthesis of single and mixed nanosized oxides of transition metals (Zn, Cu, Co, Ni, Mn, Ce). Thermal analysis is used for determining the composition of precursors and intermediates formed in the process of their pyrolysis and for finding minimal temperatures of the formation of oxide. All samples studied are found to be nanoporous materials with predominant mesoporosity. The greatest surface area is obtained for samples with metal to citric acid ratio as 1 : 2. Overviewing the results of porosity studies one can reach a conclusion regarding the optimal composition of the precursors for obtaining each of target materials of the best quality. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3513

High-rate Electrochemical Performance of Nanosized LiNi0,5Mn1,5O4

Structural and electrochemical characteristics of nanosized LiNi0,5Mn1,5O4 synthesized by means of a citric acid aided route are presented. It is found that materials treated at 800 °C consist of the maximal amount of the disordered face-centered cubic phase. Galvanostatic discharge curves registered at various discharge currents (147-5800 mA·g – 1 or 1-40 C) prove the excellent high-rate performance of the samples studied. Specifically, the sample treated at 800 °С endures a load of 40 C delivering the reversible specific capacity of 34 mAh·g – 1. Such results have never been attained with LiNi0,5Mn1,5O4 electrodes prepared using standard techniques and overwhelms all existing data published to date. This remarkable result makes evident excellent prospects of non-solid-state routes for obtaining electrode materials for heavy-duty lithium-ion batteries of new generation. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3550

Possibility of Various Types SNF Reprocessing at the PA Mayak exampled with AMB SNF

AbstractFor the purpose of reprocessing of irradiated nuclear fuel from the water-cooled graphite-moderated pressure-tube reactor named AMB from decomissioned Russian “Atom Peaceful Big”, modernization of the process flow-sheet of the RT-1 plant is being carried out at PA Mayak with participation of FSUE KRI and VNIINM. A particular AMB SNF feature is extremely broad range of fuel compounds with the main ones being the uranium-molybdenum metal, uranium oxide and uranium carbide compositions usually dispersed in magnesium or calcium. Wide range of fuel compositions required to amend SNF dissolution, extraction processing, evaporation of high-level radioactive wastes and vitrification of high-level radioactive wastes. The above set of laboratory research was completed with dynamic tests using samples of AMB from the water-cooled graphite-moderated pressure-tube reactor. Tests have shown the possibility of processing the entire range of AMB SNF at the radiochemical plant RT-1 plant of the PA Mayak. Thus, the ability of the RT-1 plant to process different fuel compositions, including the long-term research reactor fuel have been proved experimentally

COMPLEX THERAPY EFFECT ON THE STATUS OF THE CHILDREN'S KIDNEYS WITH THE VESICOURETERAL REFLUX IN THE POST OPERATION PERIOD

The medical strategy to address the vesicoureteral reflux is a very urgent issue in the children's nephrology. Based on the examination of 44 children with the iii–iv degree vesicoureteral reflux, aided by the complex of laboratory, functional and instrumental methods, the authors have analyzed the effect of the combined plant medication (Canephron N, Bionorica AG, Germany) on the short and long term outcomes of the antireflux operations. They have established that introduction of the medication into treatment leads to the term increase of the kidney resetting and urinary syndrome related to the inflammatory process inclusive.Key words: vesicoureteral reflux, antireflux operations, urodynamics disorders, tubular dysfunctions, combined plant medication, children