检索结果-南通市图书馆

Science China Materials 2017年第12期60卷 1253-1263页

作者： Daria n.Vtyurina Polina A.Eistrikh-Geller galina M.Kuz mlcheva Victor B.Rybakov Evgeny V.Khramov Irina A.Kaurova Dmitry Yu.Chernyshov Vladimir n.Korchak Semenov Institute of Chemical Physics Russian Academy of SciencesMOSCOW 119991Russia Institute of Fine Chemical Technologies Moscow Technological UniversityMoscow 119571Russia Lomonosov State University Moscow 119992Russia national Research Center《Kurchatov Instituters》 Moscow 123182Russia Swiss-norwegian Beamlines at the European Synchrotron Radiation Facility Grenoble 38000France

The structural features and real compositions with point defects of Bi+-doped TlCdCl_3 and TlCdI_3 single crystals, grown by the Bridgman-Stockbarger technique, are first studied using the X-ray diffraction, X-ray synchrotron radiation, and EXAFS/XAnES spectroscopy. In the structures of Bi^+-doped TlCdCl_3 and TlCdI_3 crystals, the Cd, Cl, and I sites are found to be defect-free. The vacancies in the Tl sites and interstitial Bi atoms located in the vicinity of the Tl sites are detected in the structures of both samples. In the Bi^+-doped TlCdCl_3, the presence of a small amount of Bi^+ ions in the Tl^+ sites is possible. The correlation between photoluminescence bands and point defects in the refined structures are determined. Photoluminescence spectra and decay kinetics of the Bi+-doped TlCdCl_3 and TlCdI_3 demonstrate that they are attractive materials for potential applications in photonics.

关键词： single crystal growth doping crystal structure point defects photoluminescence

Highly Heat-Resistant Materials for Microelectronics:Hydrodynamic,Optical,and Conformational Properties of Fluorine Containing Poly(Amido-ortho-Hydroxy Amide)

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2020年第1期35卷 223-230页

作者： Irina A Strelina Liudmila I Rudaya Ol’ga V Okatova Maxim n Bol’shakov Aleksey YuMarfichev galina K Lebedeva Yuliya V Shagayko Stanislav M Ramsh Institute of Macromolecular Compounds Russian Academy of SciencesBolshoi pr.VO 31St Petersburg199004 Russia Saint-Petersburg State Institute of Technology(Technical University) Moskovskii pr.26St Petersburg190013 Russia

The polycondensation of the mixture of diamines 5,5-methylene bis(2-aminophenol) and 4,4-(hexafluoroisopropylidene)dianiline(molar ratio 0.8:0.2) with isophthaloyl dichloride was used to synthesize poly(amido-o-hydroxy amide)(POA-F)-new heat resistant binder of the composites for microelectronics. The copolymer was fractionated, its hydrodynamic, optical, and conformational properties were researched, and molecular masses(ММ) of the fractions were defined. The polydispersity index was estimated. Based on experimental data, calculation of the size of a segment of Kuhn characterizing degree of an intramolecular orientation order and value of coefficients of the equation of Mark-Kuhn-Hauvink for viscometric and diffusion data were performed. It was demonstrated that introducing 20 mol % of the monomer with-CF3-groups does not lead to any changes in conformational properties of the macromolecules and does not change the degree of intramolecular orientational order(the Kuhn segment length). Optical characteristics of POA-F solutions are virtually similar to the corresponding values for POA prepared with the use of single amine-containing component-5,5-methylene bis(2-aminophenol). The received MM distribution for POA-F(prepolymer) provided the solubility of its films in alkaline solutions. The heat resistance(τ5 and τ10-temperatures corresponding to 5% and of 10% PBO-F mass loss of a polymer) of the powders and the films of PBO, PBO-F were determined. The electrophysical parameters-dielectric permittivity(ε) and dielectric loss tangent(tan δ) of the PBO-F films decreased down to 3.30 and 0.017, in comparison 3.40 and 0.025 for PBO respectively.

关键词： poly(o-hydroxy amide) 4,4-(hexafluoroisopropylidene) dianiline Kuhn segment Mark-Kuhn-Houwink equations translational diffusion intrinsic viscosity flow birefringence

Advanced fuel layering in line-moving, high-gain direct-drive cryogenic targets

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2019年第3期7卷 12-26页

作者： I.V.aleksandrova E.R.Koresheva Lebedev Physical Institute Russian Academy of Sciences

In inertial fusion energy(IFE)research,a number of technological issues have focused on the ability to inexpensively fabricate large quantities of free-standing targets(FSTs)by developing a specialized layering module with repeatable *** central importance for the progress towards plasma generation with intense thermonuclear reactions is the fuel structure,which must be isotropic to ensure that fusion will take *** this report,the results of modeling the FST layering time,τForm,are presented for targets which are shells of^4 mm in diameter with a wall made from compact and porous *** layer thickness is^200μm for pure solid fuel and^250μm for in-porous solid *** showsτFormndτFormn excellent result in terms of minimizing the tritium inventory,producing IFE targets in massive numbers(~1 million each day)and obtaining the fuel as isotropic ultrafine *** is shown experimentally that such small layering time can be realized by the FST layering method in line-moving,high-gain direct-drive cryogenic targets using n-fold-spiral layering channels at n=2,3.

关键词： inertial fusion energy moving free-standing targets ultrafine cryogenic layers

Specific structural features of LnZrOx(Ln:La, Sm) mixed oxides prepared by different methods

在线全文

学校读者我要写书评

暂无评论

Progress in natural Science:Materials International 2018年第4期28卷 437-446页

作者： Tatyana Kuznetsova Tamara Kriger Yurii Chesalov AnDrey Boronin Arcadii Ishchenko Pavlos K.PAnDis Vladimir Krivensov galina Litvak Tatyana Larina Vladislav Sadykov Vassilis n.Stathopoulos Boreskov Institute of Catalysis novosibirsk State University Laboratory of Chemistry and Materials Technology Department of Electrical Engineering School of Technological Applications Technological Education Institute of Sterea Ellada

LnZrOx(Ln: La, Sm) mixed oxides of Ln: Zr = 1 were prepared by different methods(complex polymerized method, sorption of cations on starch from aqueous salt solution and conventional co-precipitation with additional redispersion of precipitate by ultra sound) and calcined at 700–1300 °C. Their specific structural features and changes were studied and discussed. Various characterization methods were used such as X-ray diffraction,Electron microscopy, Fourier-transform infrared and Raman spectroscopy, UV–Vis spectroscopy, X-Ray absorption fine structure and X-ray photoelectron *** formation of pyrochlore structure occurred at 1100–1300 °C from fluorite-like pseudocubic phase ZrO2regardless the method of preparation. This phase had a block-like structure consisting of ZrO2nanocrystals stabilized by Ln cations and residual anions such as hydroxyls and carbonates. The desorption of such anions with heating already started at 900 °C and lead to local changes of Zr cations coordination to octahedral and to the formation of pyrochlore nanodomains inclusions within fluorite-like phase. The increased cation mobility and further elimination of anions caused by further heating was accompanied by the formation of bulk pyrochlore phase at 1100–1300 °C. Even after calcination at 1300 °C the local microheterogeneity as well as defects were identified at domains boundaries or sintered microstructure. These specific features of the formed pyrochlores depend on the method of preparation.

关键词： Fluorites Pyrochlores Synthesis Powders Structure

Overloading of differentiated Caco-2 cells during lipid transcytosis induces glycosylation mistakes in the Golgi complex

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

BIOCELL 2021年第3期45卷 773-783页

作者： galina n.DEnISOVA IVAn D.DIMOV AnnA V.ZAITSEVA LInARD J.ARTIUX ALEXAnDER A.MIROnOV nATALIA R.KARELInA Department of Anatomy Saint Petersburg State Paediatric Medical UniversityPetersburg194100Russia Department of Biochemistry Saint Petersburg State Paediatric Medical UniversityPetersburg194100Russia Department of Heart and Vessel Surgery Saint Petersburg State Paediatric Medical UniversityPetersburg194100Russia The FIRC Institute of Molecular Oncology Milan20139Italy

Overloading the intestine enterocytes with lipids induced alteration of the Golgi complex(GC;Sesorova et al.,2020)and could cause glycosylation ***,using differentiated Caco-2 cells with the established 0[I]blood group phenotype(no expression of the blood antigens A and B[AgA,AgB]under normal conditions)as a model of human enterocytes we examined whether the overloading of these cells with lipids could cause errors in the Golgi-dependent *** demonstrated that under these conditions,there were alterations of the GC and the appearance of lipid droplets in the *** cells produced AgA and *** suggested that after overloading of enterocytes with lipids,AgA were mistakenly synthesized in individual enterocytes by the Golgi *** mistakes could explain why in the absence of AgA and AgB antibodies against them exist in the blood.

关键词： Golgi Blood group antigens Glycosylation errors Enterocyte Lipid transcytosis Caco-2 cells

A new Criterion for Distinguishing <i>Yendonia</i>Kylin and <i>Mikamiella</i>M.J. Wynne (Delesseriaceae, Rhodophyta)

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

American Journal of Plant Sciences 2013年第12期4卷 2455-2460页

作者： Olga n. Selivanova galina G. Zhigadlova Kamchatka Branch of the Pacific Geographical Institute Far Eastern Division of the Russian Academy of Sciences Petropa- vlovsk-Kamchatskii Russia

An additional morphological criterion is presented to distinguish vegetative samples of the genera Yendonia and Mikamiella (Delesseriaceae, Rhodophyta). The undescribed earlier feature of Y. crassifolia is the presence of abundant lightrefracting cells in the tissues of the blades of both fertile and vegetative plants. This feature was never observed in Mikamiella, namely, in M. ruprechtiana. Additional data amending the description of the genus Yendonia are presented.

关键词： Rhodophyta Delesseriaceae Yendonia Mikamiella Morphological Feature

The characteristic pattern of multiple colored layers in coastal stratified lakes in the process of separation from the White Sea

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

Journal of Oceanology and Limnology 2018年第6期36卷 1962-1977页

作者： Elena D.KRASnOVA Dmitry n.MATORIn Tatiana A.BELEVICH Ludmila E.EFIMOVA Anastasiia V.KHARCHEVA natalia M.KOKRYATSKAYA galina n.LOSYUK Daria A.TODOREnKO Dmitry A.VOROnOV Svetlana V.PATSAEVA Biological Faculty of Lomonosov Moscow State University Leninskye Gory 1bld.12Moscow 119234Russia Faculty of Geography Lomonosov Moscow State University GSP-1 Leninskye Gory1Moscow 119991Russia Faculty of Physics Lomonosov Moscow State UniversityLeninskye Gory1Moscow 119991Russia n.Laverov Federal Center for Integrated Arctic Research Russian Academy of SciencesSevernoj Dviny Emb.23Arkhangelsk 163000Russia A.A.Kharkevich Institute for Information Transmission Problems Russian Academy of SciencesBolshoy Karetny Per.19bld.1Moscow 127051Russia A.n.Belozersky Institute of Physico-Chemical Biology Lomonosov Moscow State UniversityLeninskye Gory1Bld.40Moscow 119991Russia

An unusual feature of the saline stratified lakes that were formed due to ongoing postglacial uplift on the White Sea coast is the presence of several differently colored thin layers in the zone with sharp gradients. Colored layers in five lakes at various stages of separation from the sea were investigated using optical microscopy, spectrophotometry, spectrofluorimetry, and photobiology. The upper greenish colored layer located in the aerobic strata of all lakes near the compensation depth of 1% light penetration contains green algae. In the chemocline, another layer, brightly green, red or pink, is dominated by mixotrophic flagellates. Despite the very low light intensities and the presence of H 2 S, active photosynthesis by these algae appears to be occurring, as indicated by high values of the maximum quantum yield of primary photochemistry, electron transport activity, photosynthetic activity of photosystem II, the fraction of active centers, and low values of heat dissipation. In the reduced zone of the chemocline, a dense green or brown suspension of anoxygenic phototrophs(green sulfur bacteria) is located.

关键词： algal blooms coastal lakes chemocline fluorescence kinetics Arctic White Sea

The morphological changes in the internal organs of laboratory animals after prolonged oral administration of gold nanoparticles

在线全文

学校读者我要写书评

暂无评论

Journal of Innovative Optical Health Sciences 2016年第4期9卷 74-84页

作者： Alla B.Bucharskaya galina n.Maslyakova Svetlana S.Pakhomy Olga V.Zlobina Irina O.Bugaeva nikita A.navolokin Boris n.Khlebtsov Vladimir A.Bogatyrev nikolai G.Khlebtsov Valery V.Tuchin Saratov State Medical University n.a.V.I.Razumovsky 410012 Saratov Russia Institute of Biochemistry and Physiology of Plants and Microorganisms RAS 410049 Saratov Russia Research-Educational Institute of Optics and Biophotonics Saratov national Research State University 410012 Saratov Russia Institute of Precision Mechanics and Control RAS 410028 Saratov Russia Interdisciplinary Laboratory of Biophotonics Tomsk national Research State University 634050 TomskRussia

Recently gold nanoparticles(GnPs)have been actively studied as photot hermal converters,drug carriers,and imaging agents in a wide range of applications in cancer diagnosis and ther *** prolonged peroral administration of GnPs in a range of sizes was performed to investigate the morphological changes and their reversibility in the internal organs of laboratory *** this study,GnP's with average diameters of 2 nm,15 nm and 50nm were administered during 30 days,and the reversibility of morphological changes was investigated 14 days after *** the prolonged administration of GnPs,the severity of morphological changes in the liver,kidney,spleen and lymph nodes depended on the nanoparticle ***,50 nm nano-particles caused the most pronounced dystrophic and necrobiotic effects,whereas the smallest 2 nm nanoparticles caused proliferative *** importantly,the development of patho-logical processes was reversible,as evidenced by the gradual restoration of the organ structure at 14 days after the end of GnPs administration.

关键词： Gold nanoparticles prolonged peroral administration morphological changes reversibility.

A high-pinning-Type-Ⅱsuperconducting maglev for ICF target delivery:main principles,material options and demonstration models

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

High Power Laser Science and Engineering 2022年第2期10卷 20-34页

作者： I.V.aleksandrova E.R.Koresheva E.L.Koshelev P.n.Lebedev Physical Institute Russian Academy of SciencesMoscow 119991Russia

nowadays,inertial confinement fusion(ICF)research related to noncontact positioning and transport of free-standing cryogenic targets is playing an increasingly important role in this *** operational principle behind these technologies is the magnetic acceleration of the levitating target carrier(or sabot)made from Type-Ⅱ,high-temperature superconductors(HTSCs).The physics of interaction among levitation,guidance and propulsion systems is based on a quantum levitation of high-pinning HTSCs in the mutually normal magnetic *** paper discusses current target delivery strategies and future perspectives to create different permanent magnet guideway(PMG)systems for ICF target transport with *** particular,several PMG building options for optimizing both suspension and levitation of ICF targets using an HTSC-sabot will be *** solutions have been demonstrated for both linear and round PMGs,including the ones with a cyclotron acceleration process to realize high-running velocities of the HTSCsabot for a limited magnetic *** on physics,we describe in detail the main aspects of the PMG building and the results obtained from computations and proof of principle ***-pinning HTSC magnetic levitation promises a stable and self-controlled levitation to accelerate the ICF targets placed in the HTSC-sabots up to the required injection velocities of 200 m/s and beyond.

关键词： high-temperature superconductor-sabot inertial confinement fusion permanent magnet guideway system stability target delivery with levitation:Type-Ⅱsuperconductivity

Fuel characteristics, loads and consumption in Scots pine forests of central Siberia

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2020年第6期31卷 2507-2524页

作者： galina A.Ivanova Elena A.Kukavskaya Valery A.Ivanov Susan G.Conard Douglas J.McRae V.n.sukachev institute of forest sb ras-separate subdivision of the federal research center“krasnoyarsk science center of the siberian branch of the russian academy of sciences” krasnoyarskrussia 660036 M.F.reshetnev siberian state university of science and technology krasnoyarskrussia 660049 Emeritus scientist rocky mountain research stationu.s.forest servicemissoulamt 59807usa George mason university fairfaxvausa Canadian forest service natural resources canada1219 queen street eastsault st5.marieon p6a 2e5canada

Forest fuel investigations in central and southern Siberian taiga of Scots pine forest stands dominated by lichen and feather moss ground vegetation cover revealed that total aboveground biomass varied from 13.1 to 21.0 kg/m *** biomass was higher in plots in the southern taiga,while ground fuel loads were higher in the central *** developed equations for fuel biomass(both aerial and ground)that could be applicable to similar pine forest sites of Central *** loading variability found among plots is related to the impact and recovery time since the last wildfi re and the mosaic distribution of living *** consumption due to surface fi res of low to high-intensities ranged from 0.95 to 3.08 kg/m 2,that is,18–74%from prefi re *** total amount of fuels available to burn in case of fi re was up to 4.5–6.5 kg/m *** content of fuels(litter,lichen,feather moss)was related to weather conditions characterized by the Russian Fire Danger Index(PV-1)and FWI code of the Canadian Forest Fire Weather Index *** data obtained provide a strong foundation for understanding and modeling fi re behavior,emissions,and fi re eff ects on ecosystem processes and carbon stocks and could be used to improve existing global and regional models that incorporate biomass and fuel characteristics.

关键词： Pinus sylvestris Tree biomass Surface and ground fuel loads Fuel moisture Fuel consumption