Characterization of Ni-Cd Nanostructured System Obtained by Chemical Reduction of Salts

The process of obtaining of highly dispersed metal powders of Ni-Cd system by reduction of their salts by hydrazine in aqueous medium at high alkalinity was investigated. The possibility of production metal powders containing up to 50 mol% of cadmium is established and conditions for their synthesis are optimized. Phase composition, structural parameters, dispersity of solid products during the reduction process were studied by X-ray diffraction (XRD) and SAXS. The formation of metal solid solutions with FCC lattice contradicts to the known phase diagram for Ni-Cd and may be explained by increasing the energy of the particles in the nanostate. The formation of intermetallide NiCd5 in the studied compositions area is caused by sequential character of reduction process; as a result the metal product on the initial stage of reduction is significantly enriched with cadmium

Globular Clusters as Candidates for Gravitational Lenses to Explain Quasar-Galaxy Associations

We argue that globular clusters (GCs) are good candidates for gravitational lenses in explaining quasar-galaxy associations. The catalog of associations (Bukhmastova 2001) compiled from the LEDA catalog of galaxies (Paturel 1997) and from the catalog of quasars (Veron-Cetty and Veron 1998) is used. Based on the new catalog containing 8382 pairs, we show that one might expect an increased number of GCs around irregular galaxies of types 9 and 10 from the hypothesis that distant compact sources are gravitationally lensed by GCs in the halos of foreground galaxies. The King model is used to determine the central surface densities of 135 GCs in the Milky Way. The distribution of GCs in central surface density was found to be lognormal.Comment: 22 pages, 4 figure

Kinetics of exciton photoluminescence in type-II semiconductor superlattices

The exciton decay rate at a rough interface in type-II semiconductor superlattices is investigated. It is shown that the possibility of recombination of indirect excitons at a plane interface essentially affects kinetics of the exciton photoluminescence at a rough interface. This happens because of strong correlation between the exciton recombination at the plane interface and at the roughness. Expressions that relate the parameters of the luminescence kinetics with statistical characteristics of the rough interface are obtained. The mean height and length of roughnesses in GaAs/AlAs superlattices are estimated from the experimental data.Comment: 3 PostScript figure

Structure of Core-Shell Ni/Au Nanoparticles Synthesized in Two-Stage Process From Aqueous Salt Solutions

Core-shell Ni/Au nanoparticles are synthesized in a two-stage process in aqueous solutions. The core-shell structure of the synthesized particles is proven by using results of HRTEM, TEM, SAXS and CVA methods. The thickness of the core is estimated at 1 nm and it is formed from 1–2 layers of mutually oriented gold crystallites. The CVA results show that the Au-shells are nanoporous, and that a layer of nickel oxidation products is formed. These results were obtained by using Vis spectrophotometer, TEM, HRTEM, SAXS, CVA and elemental analysis

Exact Bright and Dark Spatial Soliton Solutions in Saturable Nonlinear Media

We present exact analytical bright and dark (black and grey) solitary wave solutions of a nonlinear Schrodinger-type equation describing the propagation of spatial beams in media exhibiting a saturable nonlinearity (such as centrosymmetric photorefractive materials). A qualitative study of the stationary equation is carried out together with a discussion of the stability of the solutions.Comment: 16 pages, 5 figure

К решению проблем ведения пациентов с гепатоцеллюлярной карциномой (ГЦК). Консенсус экспертов Сибири и Дальнего Востока

.Этапами подготовки консенсуса были два научных медицинских мероприятия с участием ведущих специалистов по гепатоцеллюлярной карциноме (ГЦК) сибирских и дальневосточных регионов. Междисциплинарный совет экспертов «Организация медицинской помощи пациентам с ГЦК и пациентам групп риска ее развития в Новосибирской области (НСО)», с веб-подключением специалистов Иркутского областного онкологического диспансера состоялся 24 сентября 2020 г. В рамках проекта долгосрочного научного сотрудничества Eisai Virtual Oncology Key Experts Academy (EVOKE-Academy) «Гепатоцеллюлярная карцинома» 30 сентября 2021 г. проведено Межрегиональное совещание экспертов Сибири и Дальнего Востока

Adaptational characteristics of erythron system during heat exposure

Изложены механизмы торможения эритропоэза у животных,подвергнутых длительным тепловым воздействиям. Представлены результаты экспериментальных исследований длительных тепловых воздействий на метаболизм и связанный с ними кислородный запрос тканей, периферический отдел эритрона, межклеточные и межмолекулярные взаимоотношения в кроветворной ткани – в эритробластических островках костного мозга – морфофункциональных единицах эритрона. Установлено, что продолжительное влияние тепла ведет к снижению эритропоэза, обусловленного приведением количества эритроцитов, к уменьшению потребления кислорода тканями. Последний реализуется различными механизмами повышения депонирования эритроцитов в селезенке; ускоренной элиминацией эритроцитов, мало устойчивых к гемолизу; снижением эритропоэтических свойств крови; снижением продукции гормонов щитовидной железы; воспроизводством в эритробластических островках эритроцитов, адаптированных к изменениям гомеостаза.The results of experimental investigations of long thermal effects on metabolism and associated tissue oxygen inquiry, peripheral part of the erythron, intercellular and intermolecular relationships in hematopoietic tissue – in erythroblastic islets in the bone – marrow morphofunctional erythron units. Prolonged exposure to heat leads to a decrease of erythropoiesis, bringing the number of erythrocytes due to a decrease in oxygen consumption of tissues. The last is realized by various mechanisms of increase the deposit of erythrocytes in the spleen; accelerated elimination of erythrocytes, low stability to hemolysis; reduction of erythropoietic properties of blood; decreased production of thyroid hormones; reproduction in erythroblastic of erythrocytes islets adapted to changes in homeostasis