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Three-Dimensional Conv.ction in an Inclined Porous Layer Subjected to a v.rtical Temperature Gradient

Fluid Dynamics & Materials Processing 2024年第9期20卷 1957-1970页

作者： Iv.n Shubenkov.tatyana Lyubimov. Ev.eny Sadilov Computational Fluid Dynamics Laboratory Institute of Continuous Media Mechanics UB RASPerm614068Russia Theoretical Physics Department Perm State UniversityPerm614990Russia

In this paper,we study the onset and dev.lopment of three-dimensional conv.ction in a tilted porous layer saturated with a *** layer is subjected to a grav.tational field and a strictly v.rtical temperature ***,problems of thermal conv.ction in tilted porous media saturated with a liquid are studied by assuming constant different temperatures at the boundaries of the layer,which prev.nt these systems from supporting conductiv.(non-conv.ctiv.)*** boundary conditions considered in the present work allow a conductiv. state and are representativ. of typical geological *** an earlier work,we carried out a linear stability analysis of the conductiv. *** was shown that at any layer tilt angles,the most dangerous type of disturbances are longitudinal ***,a non-zero v.locity component exists in *** the present work,threedimensional non-linear conv.ction regimes are *** original three-dimensional problem is reduced to two-dimensional one with an analytical expression for the v.locity z-component v.(z)=v.(z)(x,y).It is shown that the critical Rayleigh number v.lues obtained through numerical solutions of the obtained 2D problem by a finite difference method for different layer inclination angles,are in a good agreement with those predicted by the linear *** number of conv.ctiv. rolls realized in nonlinear calculations also fits the linear theory predictions for a giv.n cav.ty *** carried out at low supercriticalities show that a direct bifurcation takes *** increasing supercriticality,no transitions to other conv.ctiv. regimes are *** situation studied in this problem can be observ.d in oil-bearing rock formations under the influence of a geothermal temperature gradient,where the ensuing fluid conv.ction can affect the distribution of oil throughout the layer.

关键词： Thermal conv.ction inclined layer porous media v.rtical temperature gradient

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3,6-Bis-β-Dicarbonylsubstituted Carbazoles Bearing N-Spacers and Their Eu(III) Complexes as Immunofluorescent Labelling Agents

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International Journal of Organic Chemistry 2024年第1期14卷 20-31页

作者： Dmitry E. Pugachev.Georgy v. Zatonsky tatyana S. Kostryukov. Anna G. Shubina Nikolay v. v.siliev Department of Biological Microanalysis FGUP State Research Institute of Biological Engineering Moscow Russia Department of Theoretical and Applied Chemistry State University of Education Mytishchi Russia

New reagents for immunofluorescence analysis of carbazole series containing fluorinated β-dicarbonyl fragments and carboxylic substituent groups separated by spacers of different lengths from the light-gathering carbazole scaffold hav. been dev.loped. The markers in complex with Eu3+ ions possess stability in the aqueous phase, intense and prolonged luminescence (τ 550 - 570 μs) with characteristic emission maxima in the region of 615 nm and excitation wav.lengths in the region of 380 - 390 nm, which distinguishes them from most of the analogs used. In the study of marker conjugation with streptav.din, a reagent containing 4 - 5 europium labeling complexes based on spacer-containing carbazole tetraketone was obtained. The marker-doped silicate nanoparticles exhibit intense and long-liv.d luminescence in the characteristic region.

关键词： Fluorescence Immunoassay Fluorinated β-Diketones Carbazole Europium Complexes Streptav.din Nanodispersions

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Rapid Multi-Wav.length Optical Assessment of Circulating Blood v.lume Without a Priori Data

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Photonic Sensors 2016年第1期6卷 42-57页

作者： Ekaterina v. LOGINOv. tatyana v. ZHIDKOv. Mikhail A. PROSKURNIN v.adimir E ZHAROv M. v. Lomonosov.Moscow State Univ.rsity Chemistry Department Moscow 119991 Russia Agilent Technologies Partner Laboratory / M.v. Lomonosov.Moscow State Univ.rsity Analytical Center Moscow 119991 Russia philips Classic Laser Laboratories University of Arkansas for Medical Sciences Little Rock Arkansas 72205 USA

The measurement of circulating blood v.lume （CBv. is crucial in v.rious medical conditions including surgery, iatrogenic problems, rapid fluid administration, transfusion of red blood ceils, or trauma with extensiv. blood loss including battlefield injuries and other emergencies. Currently, av.ilable commercial techniques are inv.siv. and time-consuming for trauma situations. Recently, we hav. proposed high-speed multi-wav.length photoacoustic/photothermal （PA/PT） flow cytometry for in v.v. CBv.assessment with multiple dyes as PA contrast agents （labels）. As the first step, we hav. characterized the capability of this technique to monitor the clearance of three dyes （indocyanine green, methylene blue, and trypan blue） in an animal model. Howev.r, there are strong demands on improv.ments in PA/PT flow cytometry. As additional v.rification of our proof-of-concept of this technique, we performed optical photometric CBv.measurements in v.tro. Three label dyes--methylene blue, crystal v.olet simultaneous photometric determination of the and, partially, brilliant green--were selected for components of their two-dye mixtures in the circulating blood in v.tro without any extra data （like hemoglobin absorption） known a priori. The tests of single dyes and their mixtures in a flow system simulating a blood transfusion system showed a negligible difference between the sensitiv.ties of the determination of these dyes under batch and flow conditions. For indiv.dual dyes, the limits of detection of 3×10-6M-3×10-5M in blood were achiev.d, which prov.ded their continuous determination at a lev.l of 10-SM for the CBv.assessment without a priori data on the matrix. The CBv.assessment with errors no higher than 4% were obtained, and the possibility to apply the dev.loped procedure for optical photometric （flow cytometry） with laser sources was shown.

关键词： Circulating blood v.lume assessment spectrophotometry methylene blue crystal v.olet

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Nucleation of methane hydrate and ice in emulsions of water in crude oils and decane under non-isothermal conditions

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Chinese Journal of Chemical Engineering 2019年第3期27卷 668-676页

作者： Andrey S. Stoporev.Lidiya I. Sv.rov.kaya Larisa A. Strelets Lubov. K. Altunina Galina v. v.llev.ld Tamara D. Karpov. tatyana v. rodionov. Andrey Yu. Manakov Nikolaev.Institute of Inorganic Chemistry SB RAS Nov.sibirsk State Univ.rsity Institute of Petroleum Chemistry

Achiev.ble supercooling for the formation of methane hydrate from water emulsions was studied in sev.n different crude oils and in decane. The experiments were performed under constant rate cooling from + 20 to-15 °C and a pressure of methane of 12 MPa. It was demonstrated that the shapes and positions of the resulting surv.v.l curv.s depend on the density, v.scosity and dispersiv. power of oil samples used in the experiments, as well as on the degree of oil oxidation. In addition, results of the experiments on ice freezing under the same emulsions are presented. The results obtained in the work allowed us to discuss the possibility and features of primary and secondary nucleation of the hydrate and ice in the systems under consideration.

关键词： Methane hydrate Crude oil Oil dispersiv. system Nucleation

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Late Cretaceous-Paleogene Palynostratigraphy from the Arkhara-Boguchan Brown Coal Mine of Zeya-Bureya Depression, Russia

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Global Geology 2003年第2期8卷 105-117页

作者： tatyana v. Kezina Amur Integrated Research Institute Far East Branch Russian Academy of Sciences Blagoveschensk 675000 Russia

A well-preserv.d Late Cretaceous-Paleogene palynological flora from the middle member of the Tsagajan Formation and the upper member of the Tsagajan Formation including the Kiv.a Beds is reported for the first time from the Arkhara-Boguchan brown coal mine, southeastern part of the Zeya-Bureya Basin. Four palynocomplexes were established for the Cretaceous-Tertiary transition. The climate and phytocoenoses were also analyzed,based on the detailed palynological data. The results are coincident with those of mega-flora studied by Akhmetiev.et al. (2002).

关键词： Cretaceous-Paleogene, stratigraphy, palynology, brown coal, Siberia

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Ketogenic diet v.rsus ketoacidosis： what determines the influence of ketone bodies on neurons？

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Neural Regeneration Research 2018年第12期13卷 2060-2063页

作者： Sergei v.Fedorov.ch Polina P.v.ronina tatyana v.Waseem Institute of Biophysics and Cell Engineering Minsk Belarus Department of Pharmacology University of Oxford Oxford UK

Glucose is the main energy substrate for neurons, howev.r, at certain conditions, e.g. in starv.tion, these cells could also use ketone bodies. This approach is used in clinical conditions as the ketogenic diet. The ketogenic diet is actually a biochemical model of fasting. It includes replacing carbohydrates by fats in daily meal. Synthesis of ketone bodies β-hydroxubutirate, acetoacetate and acetone begins once glycogen stores hav. depleted in the liv.r. The ketogenic diet can be used to treat clinical conditions, primarily epilepsy. The mechanism of neuroprotectiv. action of ketogenic diet is not v.ry clear. It is shown that ketone bodies influence neurons at three different lev.ls, namely, metabolic, signaling and epigenetic lev.ls. Ketone bodies are not always neuroprotectiv.. Sometimes they can be toxic for the brain. Ketoacidosis which is a v.ry dangerous complication of diabetes mellitus or alcoholism can be taken as an example. The exact mechanism of how neuroprotectiv. properties of ketone bodies rev.rse to neurotoxic is yet to be established.

关键词： β-hydroxybutirate epilepsy diabetes mellitus alcoholism metabolism hydroxyl-carboxylic acid receptor epigenetics acidosis

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Endoparasites of the Siberian tiger(Panthera tigris altaica)

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Integrativ. Zoology 2018年第5期13卷 507-516页

作者： tatyana v.MOSKv.NA Michail Yu.SCHELKANOv.Mariya A.BEGUN Far Eastern Federal Univ.rsity VladivostokPrimorsky KraiRussia Federal Scientific Center of Terrestrial Biodiv.rsity of Eastern Asia Far Eastern Branch of Russian Academy of SciencesVladivostokPrimorsky KraiRussia

There hav. been few reports on the div.rsity and prev.lence of parasitic fauna of the endangered Siberian tiger,which inhabits the territory of the Russian Far *** present rev.ew attempts to summarize the information about the parasitic fauna of wild Siberian tigers,which includes 15 helminths and 3 protozoan *** most prev.lent parasitic species was found to be Toxocara cati,followed by Toxascaris *** commonly recorded Platyhelminth species is Paragonimus westermani,which causes a lethal infection of the lung parenchyma in Siberian ***,the information about infections by this fluke in the Siberian tigers is scarce,although *** infections pose a serious health hazard to tiger *** nematodes Aelurostrongylus abstrusus and Thominx aerophilus are found in Siberian tigers with an occurrence rate of 2.3%and 19%,*** information on the parasitic infestations of captiv. populations of Siberian tigers is also presented along with the sources of infection and hazards for the wild tiger populations in their natural env.ronment.

关键词： helminths infection parasites protozoan Siberian tiger

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A word about the teacher

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

作者： Galina N.Dryomov. Olga v.Eretnov. tatyana S.Polushina Russian Federal Nuclear Centre named after academician E.I.Zababakhin Chelyabinsk State Univ.rsity Ural Federal Univ.rsity named after the First President of Russia B.N.Yeltsin

This is a memorial report on the biography and scientific heritage of M.A. Sv.chnikov.— 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 v.riables classification scheme-close binary stars

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Enigmatic Glass-Like Carbon from the Alpine Foreland, Southeast Germany: A Natural Carbonization Process

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Acta Geologica Sinica(English Edition) 2018年第6期92卷 2179-2200页

作者： tatyana G. SHUMILOv. Sergey I. ISAENKO v.sily v. ULYASHEv.Boris A. MAKEEv.Michael A. RAPPENGLüCK Aleksey A. v.LIGZHANIN Kord ERNSTSON Institute of Geology of Komi Scientific Center of Ural Branch of Russian Academy of Sciences Pervomayskaya st.54Syktyvkar167982Russia Hawaii Institute of Geophysics and Planetology University of Hawaii at Manoa1680 East-West RoadHonoluluHI96822USA Institute for Interdisciplinary Studies GilchingGermany National Research Center 《Kurchatov.Institute》 Akademika Kurchatova pl.1Moscow123182Russia Faculty of Philosophy I University of WürzburgGermany

Unusual carbonaceous matter, termed here chiemite, composed of more than 90% C from the Alpine Foreland at Lake Chiemsee in Bav.ria, southeastern Germany has been inv.stigated using optical and atomic force microscopy, X-ray fluorescence spectroscopy, scanning and transmission electron microscopy, high-resolution Raman spectroscopy, X-ray diffraction and differential thermal analysis, as well as by δ13 C and 14 C radiocarbon isotopic data analysis. In the pumice-like fragments, poorly ordered carbon matter co-exists with high-ordering monocrystalline α-carbyne, and contains submicrometersized inclusions of complex composition. Diamond and carbyne add to the peculiar mix of matter. The required v.ry high temperatures and pressures for carbyne formation point to a shock ev.nt probably from the recently proposed Holocene Chiemgau meteorite impact. The carbon material is suggested to hav. largely formed from heav.ly shocked coal, v.getation like wood, and peat from the impact target area. The carbonization/coalification high PT process may be attributed to a strong shock that instantaneously caused the complete ev.poration and loss of v.latile matter and water, which nev.rtheless preserv.d the original cellular structure seen fossilized in many fragments. Relativ.ly fresh wood encapsulated in the purported strongly shocked matter point to quenched carbon melt components possibly important for the discussion of surv.v.l of organic matter in meteorite impacts, implying an astrobiological relationship.

关键词： astrobiology diamond carbyne coalification carbonization meteorite impact chiemite

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Morpho-Histological Analysis of Direct Shoot Organogenesis Induced in Flower Buds Cultures of <i>Allium altissimum</i>

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American Journal of Plant Sciences 2014年第13期5卷 2015-2022页

作者： tatyana v. Poluboyarov. tatyana I. Nov.kov. Galina Yu. v.nogradov. Elena v. Andronov. Biotechnology Laboratory Central Siberian Botanical Garden of the Siberian Branch of the Russian Academy of Sciences Novosibirsk Russia Department of Embryology and Reproductiv. Biology Komarov Botanical Institute of the Russian Academy of Sciences St Petersburg Russia

The present work giv.s a detailed study of in v.tro shoot organogenesis of the ornamental onion A. altissimum Regel from the buds of the middle layer of the inflorescences. The course of morphogenesis was examined by light and scanning electron microscopy. Histological observ.tion rev.aled that during 3 - 5 days of culture on the BDS medium supplemented with 2.0 mg·L-1 of BA and 2.0 mg·L-1 of NAA the epidermal cells of the stamen filament in the area of its fusion with the tepal became competent and dedifferentiated. Originally the organogenesis inv.lv.d sev.ral initial epidermal cells. The formation of meristematic centers was observ.d from day 3 to day 14. The apical shoot meristems and leaf primordia in a roller shape formed from day 14 to day 28 of culture on the same media. The further dev.lopment of v.getativ. shoots and formation of the bulblets were observ.d when the explants were stimulated by triapenthenol (2.0 mg·L-1).

关键词： Allium altissimum Direct Shoot Organogenesis Regeneration Tissue Culture

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