Морфология, строение и состав циркона из метапесчаников алькесвожской толщи (Приполярный Урал)

Description of the features of morphology, internal structure, and analysis results of Th/U and Zr/Hf ratios in zircons from sandstones of the gold-bearing Alkesvozhskaya sequence, located at the basement of the Paleozoic section in the Subpolar Urals, is presented. It has been established that most of the studied zircons are primary igneous grains of the first weathering cycle. The detrital zircon source was probably in formations close in age, underlying or located nearby felsic and basic volcanics of igneous complexes of different stages of formation of Timanides-protouralides, associated granitoids, and intrusive mafic formations. Small part of well-rounded zircon Pre-Riphean grains can be redeposited from the Riphean metasedimentary formations, which, in turn, inherited it from the rocks of the ancient basement of the East European PlatformПриведены описание особенностей морфологии, внутреннего строения и анализ отношений Th/U и Zr/Hf в цирконах из песчаников золотоносной алькесвожской толщи, расположенной в основании палеозойского разреза на Приполярном Урале. Установлено, что большинство изученных цирконов являются первично-магматическими зернами первого цикла выветривания. Источником обломочного циркона, вероятно, являлись близкие по времени образования подстилающие или расположенные поблизости кислые и основные вулканиты магматических комплексов различных стадий формирования тиманид-протоуралид, ассоциирующие с ними гранитоиды и интузивные образования основного состава. Незначительная часть хорошо окатанных зерен циркона с дорифейскими датировками может быть переотложена из рифеских метаосадочных образований, в свою очередь унаследовавших его из пород древнего фундамента Восточно-Европейской платформы

Самородная платина в хондрите

The article presents the first results of the study of native platinum extracted from chondrite. The native platinum forms microinclusions in carbonaceous matter andchromites, which are found in ordinary chondrite. Native platinum forms micrograins and aggregates of cubic microcrystals, most of which are free from impurities. The composition of platinum-containing chromites corresponds to terrestrial analogues of ultrabasic mantle rocks. Assumption about the magmatic origin of platinum-containing carbon is made.Приведены первые результаты изучения самородной платины, микровключения которой обнаружены в углеродистом веществе и хромитах из обыкновенного хондрита. Самородная платина образует мелкие зерна и сростки кубических микрокристаллов, большинство которых свободны от примесей. Определен состав содержащих платину хромшпинелидов и установлено, что он соответствует земным аналогам из ультраосновных пород мантийного происхождения. Сделано предположение о магматическом происхождении содержащего платину углерода

CORECLUST: identification of the conserved CRM grammar together with prediction of gene regulation

Identification of transcriptional regulatory regions and tracing their internal organization are important for understanding the eukaryotic cell machinery. Cis-regulatory modules (CRMs) of higher eukaryotes are believed to possess a regulatory ‘grammar’, or preferred arrangement of binding sites, that is crucial for proper regulation and thus tends to be evolutionarily conserved. Here, we present a method CORECLUST (COnservative REgulatory CLUster STructure) that predicts CRMs based on a set of positional weight matrices. Given regulatory regions of orthologous and/or co-regulated genes, CORECLUST constructs a CRM model by revealing the conserved rules that describe the relative location of binding sites. The constructed model may be consequently used for the genome-wide prediction of similar CRMs, and thus detection of co-regulated genes, and for the investigation of the regulatory grammar of the system. Compared with related methods, CORECLUST shows better performance at identification of CRMs conferring muscle-specific gene expression in vertebrates and early-developmental CRMs in Drosophila

Phase Equilibrium and Interdiffusion in Blends of Polystyrene with Polyacrylates

The solubility and interdiffusion of polystyrene (PS) with polymethyl acrylate (PMA), polyethyl acrylate (PEA), polybutyl acrylate (PBA), and polyethylhexyl acrylate (PEHA) have been studied by the optical interferometry method. Phase state diagrams are plotted. It is shown that they are characterized by the upper critical solution temperatures (UCST), which are localized in the temperature range above 450 K. Pair interaction parameters and their temperature dependences are determined and analyzed. Extrapolation of the temperature dependence of the interaction parameter was used to construct the dome of binodal curves and determine the spinodal curves in the framework of the Flory–Huggins theory. The diffusion coefficients of polystyrene into polyacrylates and polyacrylates into polystyrene are calculated. The dependences of the interdiffusion coefficients on the concentration, temperature, polystyrene molecular weight, and the number of carbons in the side chain of polyacrylate are analyzed. The numerical values of the interdiffusion coefficients of PS-1 into polyacrylates at 433 K change as −8.5 → −6.7 → −6.4 in the homologous series PMA → PEA → PBA. The coefficients of friction are calculated and the effect of change in the matrix structure on the diffusion of polystyrene in them is estimated

Life-purpose orientations of today’s university students of a multicultural region

You The article presents an empirical study of the life-purpose orientations of thirdand fourth-year students of various directions of undergraduate training: “Psychology”, “Environmental sciences”, “Economics”, “Law” of the Volga Humanitarian Institute (branch) of Volgograd State University. The study used the Life-Purpose Orientations Test (LPO technique) of D.A. Leontiev as the main technique. The results of respondents in this sample correspond to the average level of indicators on all scales. In addition, students were offered the author’s questionnaire “What is valuable to you?” An analysis of the answers led to the conclusion that spiritual values are a priority for almost all students and “Family” is the most significant value

Simulation of Binodal and Spinodal Curves of Phase State Diagrams for Binary Polymer Systems

A new approach is proposed for simulating binodal and spinodal curves of phase diagrams for binary polymer systems. It is shown that the Flory–Huggins theory makes it possible to predict phase behavior in a wide range of temperatures and concentrations based on limited data on the components’ solubility. The approbation data of the technique are presented in the example of PS–PB and PS–PMMA systems, for which generalized phase diagrams are constructed

Organization of IT-Based Socio-Pedagogical Research by Students of Pedagogical University

В работе описан опыт организации исследовательской работы студентов педагогических специальностей при изучении характеристик и условий учебного процесса на базе on-line опросов. Проанализированы основные виды исследовательской деятельности, ресурсы их поддержки и практические результаты.The paper deals the experience of organizing research work of students of pedagogical specialties in studying the characteristics and conditions of the educational process by on-line surveys. It was analyzed the main types of research activities, their support resources and practical results

Характеристики метапесчаников светлинской свиты – субстрата щелочных рудных метасоматитов (Октябрьское рудное поле, Средний Тиман)

The paper considers the characteristics of the meta sandstones of the Svetlinskaya Suite developed within the Oktyabrskoe ore field at the Chetlas Stone (Middle Timan) and serving as a substrate for ore alkaline metasomatites. The main source of detrital material for fine-grained feldspar-quartz metasandstones during their formation were the meta-sedimentary and, to a lesser extent, acidic igneous rocks, including those altered in the weathering crust. The formation of metapsammites took place under relatively stable tectonic conditions of the passive continental margin.Рассмотрены характеристики метапесчаников светлинской свиты, развитых в пределах Октябрьского рудного поля на Четласском Камне (Средний Тиман) и служащих субстратом рудных щелочных метасоматитов. Основным источником обломочного материала при формировании полевошпат-кварцевых мелкозернистых метапесчаников были метаосадочные и, в меньшей степени, кислые магматические породы, в том числе измененные в коре выветривания. Образование песчаников проходило в относительно стабильных тектонических условиях пассивной континентальной окраины