检索结果-南通市图书馆

Passive seismic investigation of intraplate earthquakes epicentral zones in the north of Russia as one of the ways to understand their source mechanics

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2024年

作者： Konstantin Danilov galina Antonovskaya Irina Basakina Eugenia Shakhova natalia Kapustian n.Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences

Studying the inner structure of intraplate earthquakes originating in aseismic areas， which are poorly covered by seismic networks or as historical earthquakes is usually the only way to get knowledge about their source mechanisms that is partially important to deeper understand intraplate geodynamics. The epicentral zones of earthquakes are situated in hard-to-reach areas， so， using active seismic methods for such purposes is unreasonable or even impossible because of high cost and logistical difficulties. We are presenting a way to join using different passive seismic methods， which allows us to get sufficient information about geological environment structure for such task solutions. As an example， we investigated the inner structure of platform earthquake epicentral zone originated up north of Russia. We used four passive seismic methods: microseismic sounding method， passive seismic interferometry， HVSR method， and microseismic activity method. We show that passive seismic data， recoded in the same installation and processed by these different methods， can provide sufficient information about structure of studied environment， needed to explain source mechanism. In sum， the hypocenter zone is presented by intersection of vertical faults and a lateral fractured zone in the middle crust. Results were confirmed by comparison with results by active seismic methods.

关键词：

Prognostic and predictive role of immune microenvironment in colorectal cancer

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2024年第3期16卷 643-652页

作者： Olesya Kuznetsova Mikhail Fedyanin Larisa Zavalishina Larisa Moskvina Olga Kuznetsova Alexandra Lebedeva Alexey Tryakin galina Kireeva Gleb Borshchev Sergei Tjulandin Ekaterina Ignatova Department of Chemotherapy Federal State Budgetary Institution(N.N.Blokhin National Medical Research Center of Oncology)of the Ministry of Health of the Russian FederationMoscow 115478Russia Department of Pathology Russian Medical Academy of Continuous Professional EducationMoscow 123242Russia OncoAtlas LCC Moscow 115478Russia Federal State Budgetary Institution“national Medical and Surgical Center named after n.I.Pirogov”of the Ministry of Health of the Russian Federation Moscow 105203Russia STOOnCO:Science and Technology in Oncology Moscow 115478Russia

Colorectal cancer(CRC)represents a molecularly heterogeneous disease and one of the most frequent causes of cancer-related death *** traditional classification of CRC is based on pathomorphological and molecular character-istics of tumor cells(mucinous,ring-cell carcinomas,etc.),analysis of mechanisms of carcinogenesis involved(chromosomal instability,microsatellite instability,CpG island methylator phenotype)and mutational statuses of commonly altered genes(KRAS,nRAS,BRAF,APC,etc.),as well as expression signatures(CMS 1-4).It is also suggested that the tumor microenvironment is a key player in tumor progression and metastasis in *** to the latest data,the immune microenvironment can also be predictive of the response to immune checkpoint *** this review,we highlight how the immune environment influences CRC prognosis and sensitivity to systemic therapy.

关键词： Immunoscore Immune microenvironment Colorectal cancer Gastrointestinal cancers Predictive biomarkers Digital pathology

Olefin Polymerization Behavior of Titanium(IV) Complexes with Fluorinated and non-fluorinated Aliphatic Phenoxyimine Ligands

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第1期42卷 52-62,I0007页

作者： Vladislav A.Tuskaev Kasim F.Magomedov Svetlana Ch.Gagieva Dmitry A.Kurmaev Yulia V.nelyubina Evgenii K.Golubev Maria D.Evseeva Viktor G.Vasil'ev galina G.nikiforova Mikhail I.Buzin Vyacheslav S.Bogdanov Boris M.Bulychev Department of Chemistry M.V.Lomonosov Moscow State UniversityMoscow 119992Russian Federation A.n.nesmeyanov Institute of Organoelement Compounds Russian Academy of SciencesMoscow119991Russian Federation Enikolopov Institute of Synthetic Polymer Materials Russian Academy of SciencesMoscow 117393Russian Federation

A series of Ti(Ⅳ) dichloride and dialkoxide com plexes with phenoxyimine ligands containing fluorinated and nonfluorinated aliphatic imine fragments have been *** molecular structures of complexes 1 and 4 were established by single-crystal X-ray diffraction *** complexes adopt a distorted octahedral coordination structure around the titanium atom and two oxygen atoms are situated in trans position while two nitrogen atoms and two outgoing ligands(Cl or iPrO) are situated in cis *** of activators(MMAO-12 and combinations Et_nAICl_(3-n)+Bu_(2)Mg) and outgoing ligand(Cl or iPrO) nature on the catalytic activity and properties of the resulting polymers was *** Ti complexes,despite the nature of the outgoing ligands(Cl or iPrO) in the presence of Al/Mg activators,was found to display a high ethylene polymerization activity in the range 1600-3830 kg_(polymer)·mol_(Ti)^(-1)·h^(-1)·atm^(-1) with a viscosity average molecular weight(M_v) value in the range 1.1×10~6-7.1×10~6 Dalton(Da).The resulting UHMWPE can be processed by a solventless method into high-strength and high-modulus oriented *** rheological characteristics of a polymer melt have been *** absence of a cross-over point did not allow to compare the values of the molecular weight distribution of polymers obtained on fluorinated and non-fluorinated pre-catalysts,however,the estimation of the entanglement density is in good agreement with the mechanical characteristics of oriented film *** activation with methylalumoxane,the activity of the com plexes decreased very significantly;however,a polymer with a molecular weight of about 12 million Da was *** the process of ethylene/octene-1 copolymerization,fluorine-containing precatalysts showed a clear advantage over non-fluorinated analogues both in activity and in comonomer content.

关键词： FI catalysts Titanium(IV) (Co)polymerization Al/Mg co-catalyst Ultra-high molecular weight polyethylene

Role of the Rossiter-McLaughlin effect in the study of close binaries

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2019年第3期19卷 21-30页

作者： galina n.Dryomova Vladimir V.Dryomov Russian Federal nuclear Centre

This paper is devoted to binary stars belonging to the class of eclipsing-variable *** and spectroscopic analysis of eclipses allows us to determine geometric parameters of the orbit and physical characteristics of stellar components as well as inclinations of stellar equators to the orbital plane. Estimations of inclinations can be obtained from measurement of the Rossiter-McLaughlin effect, which is discussed using examples of some eccentric binaries with an anomalous apsidal effect. Our task is to find the complete spectrum of solutions of the equation of apsidal motion, depending on the inclinations of the polar axes of the components to the orbital one for these systems, based on their individual spectroscopic and photometric observational data. The matrix of solutions allows us to select those pairs of polar inclinations that provide agreement with the observational apsidal period.

关键词： Rossiter-McLaughlin effect: eclipsing-variable stars apsidal effect individual binaries: AI Hya,nY Cep,EW Ori,DI Her,AS Cam

Casimir Effect in Optoelectronic Devices Using Ferrofluids

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2020年第1期18卷 76-82页

作者： Elena n.Velichko galina L.Klimchitskaya Elina n.nepomnyashchaya Institute of Physics Nanotechnology and TelecommunicationsPeter the Great St.Petersburg Polytechnic UniversitySt.Petersburg 195251 Department of Astrophysics Central Astronomical Observatoryat Pulkovo of the Russian Academy of SciencesSt.Petersburg 196140

Some of the modern electronic and optoelectronic devices exploit ferrofluids contained in narrow gaps between two material plates. When the width of the gap becomes below a micrometer, the boundary plates are subjected to the Casimir force arising from the zero-point and thermal fluctuations of the electromagnetic field. These forces should be taken into account in microdevices with the dimensions decreased to below a micrometer. In this paper, we review recently performed calculations of the attractive Casimir pressure in three-layer systems containing a ferrofluid. We also find the ferrofluidic system where the Casimir pressure is repulsive. This result is obtained in the framework of the fundamental Lifshitz theory of van der Waals and Casimir forces. The conclusion is made that enhanced repulsion due to the presence of a ferrofluid may prevent from sticking of closely spaced elements of a microdevice.

关键词： Casimir pressure ferrofluids microdevices repulsion

Alkali-earth Element Aluminates and Chromites Cement Bonded Refractory Castables

在线全文

学校读者我要写书评

暂无评论

China's Refractories 2016年第1期25卷 26-31页

作者： galina n. SHABAnOVA Alla n. KOROHODSKA national Technical University "Kharkov Polytechnic Institute" Kharkov 61002 Ukraine

This scientific paper gives the data of theoretical and experimental research done to solre the scientific and practical problem related to the establishment of theoreti- cal basics and the dertelopment tf the technolog） ./br the production of re/iactorv eastables of high strength, high refractoriness and hostile environment resistance on the basis of aluminates and chromites of alkali-earth ele- *** due to the well-directed formation of the phase composition and the structure of clinker, cement stone and castables. Th, e conceptual princoples of the jbrmation of such materials are based on the primaos thermody- namically advantageous coexistence of the special-pur- pose combinatiots of phases in the subsolidus structure of the muhicomponent subsystems of the oxide system （Mg, Ca, St, Ba）O- Al2O3 -Cr2O3. The obtained data allow for the development of high-strength refracto- ry alumochromite cements and castables based on them. Specific features of the behaiior of phase formation processes and the hydration of alumochromite cements, including the structure Jormation during the castahle service hare been studied.

关键词： refractory castables suhsolidus structure multieomponent system phase formation hydration alumochromite cements strength refractoriness

A word about the teacher

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2019年第3期19卷 35-46页

作者： galina n.Dryomova Olga V.Eretnova Tatyana S.Polushina Russian Federal nuclear Centre named after academician E.I.Zababakhin Chelyabinsk State University Ural Federal University named after the First President of Russia B.n.Yeltsin

This is a memorial report on the biography and scientific heritage of M.A. Svechnikov — an outstanding scientist and teacher, the founder of the Ural school of close binary stars and the author of the classification ... 详细信息

关键词： catalogs photometric-spectroscopic-stars eclipsing variables classification scheme-close binary stars

Effect of WC/ni-Cr additive on changes in the composition of an atmospheric residue in the course of cracking

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2020年第2期17卷 499-508页

作者： galina S.Pevneva natalya G.Voronetskaya nikita n.Sviridenko Anatoly K.Golovko Institute of Petroleum Chemistry SB RAS 4 Akademicheskiy AveTomskRussia 634055

The paper presents the results of investigation of changes in the composition of hydrocarbons and sulfur-containing compounds of an atmospheric residue in the course of cracking in the presence of a tungsten carbide-nickel-chromium(WC/ni-Cr)catalytic additive and without *** cracking is carried out in an autoclave at 500℃for 30 *** addition of the WC/ni-Cr additive promotes the deepening of reactions of destruction not only of resins and asphaltenes,but also high molecular weight naphthene-aromatic compounds of the atmospheric *** is shown that the content of low molecular weight C9-C17 n-alkanes and C9-C10 alkylbenzenes rose sharply in the products of cracking with addition of WC/ni-Cr in comparison with those produced without the ***-and naphthene-substituted aromatic hydrocarbons of benzene,naphthalene,phenanthrene series,polyarenes,benzo-and dibenzothiophenes are identified.

关键词： Atmospheric residue Cracking Catalytic additive Hydrocarbons Composition

Geographical Variants of the Siberian Alpine Vegetation for the ＂Circum-Boreal Vegetation Map＂

在线全文

学校读者我要写书评

暂无评论

Journal of Life Sciences 2013年第6期7卷 643-652页

作者： galina n. Ogureeva Faculty of Geography Lomonosov Moscow State University Moscow 119991 Russia

The vegetation cover in highlands is rather peculiar and complicated in its structure. The experience gained in mapping of alpine vegetation shows that the schematic small-scale maps reflect only the very common features. In boreal forest mountains of Siberia there are four systems of alpine vegetation including alpine-meadow, goltsy-tundra, island near the Pacific Ocean and tundra-steppe ones. Every system is represented by several geographical variants, characterized by regional phytogeographical peculiar features of this vegetation. The geographical variant includes a number of altitudinal belts （zones）, each of them has its floristic peculiarities and complexes of plant formations （for instance, Altai-Sayan variant composes of subalpine-alpine-subnival-nival belts）. Such geographical variants of alpine vegetation may be indicated as chorological units on a new Circum-Boreal Vegetation Map. Under discussion is the possible use of ecological-geographical approach to reflect the alpine vegetation as chorological （structural） units of the vegetation cover being exemplified by high mountains of the Siberia. This map may be more informative in terms of regional peculiarities in alpine vegetation within the boreal biome.

关键词： Biodiversity mapping high mountain (alpine) vegetation altitudinal zonality type.