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Short-term antioxidant diet prev.nts hyperfiltration in young male rat kidney subjected to ischemia/reperfusion injury

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Open Journal of Molecular and Integrativ. Physiology 2013年第1期3卷 36-41页

作者： yuriy Slyv.a Felicia v. Nowak Tracey M. Hayes Sharon R. Inman Department of Biomedical Sciences Ohio University Athens USA Program in Molecular and Cellular Biology Ohio University Athens USA

Objectiv.s: The process of transplantation is associated with exposure to both long and short cold and warm ischemic times that result in ischemia/reperfusion injury. Oxidativ. stress contributes to tissue fibrosis, renal dysfunction, and/or rejection. Treatments that scav.nge oxygen free radicals and hav. antioxidant properties can ameliorate the damaging results in renal grafts following ischemia/reperfusion injury. The present study tests the hypothesis that an antioxidant-fortified diet giv.n to rats before and after renal ischemia/reperfusion injury will reduce the kidney damage that results and improv. renal function. Endothelial and inducible nitric oxide synthases may change with tissue injury, including ischemia/ reperfusion. Materials and Methods: Male Wistar rats were subjected to ischemia/reperfusion injury at 7 or 19 weeks of age with or without dietary antioxidant supplementation. One week later, glomerular filtration rate, mean arterial pressure and urinary nitric oxide were measured, and renal endothelial and inducible nitric oxide synthases examined. Results: The glomerular filtration rate was elev.ted more than two-fold abov. the normal range? at 8 weeks in animals on the regular diet exposed to ischemia/reperfu- sion, while in the 8 week antioxidant-fortified diet group the glomerular filtration rate was normal. Also, in 8 week rats, lev.ls of endothelial nitric oxide synthase protein in cortex were higher on the regular than on the antioxidant-fortified diet. Conclusion: Early after ischemia/reperfusion injury renal endothelial nitric oxide synthase lev.ls rise, possibly contributing to v.scular dilation and hyperperfusion, and an antioxidant-fortified diet can ameliorate these changes in the younger age group.

关键词： Antioxidants Ischemia/Reperfusion Kidney Nitric Oxide Synthase

Effect of hydrodynamic desulphurisation of low parameters on the oxidativ. rank coal

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International Journal of Coal Science & Technology 2018年第2期5卷 213-229页

作者： Serhiy Pyshyev.yuriy Prysiazhnyi Mariia Shv.d Marek Kulazynski Denis Miroshnichenk Department of Chemical Technology of Oil and Gas Processing Institute of Chemistry and Chemical Technology Lviv Polytecnic National University 12 Bandery Str. Lviv 79013 Ukraine Div.sion of Chemistry and Technology of Fuel Faculty of Chemistry Wroclaw University of Science and Technology Gdafiska Str. 7/9 50-344 Wroclaw Poland National Technical Univ.rsity "Kharkiv.Polytechnic Institute" 2 Kirpichova St. Kharkiv 61002 Ukraine

In this paper, the desulphurisation of high sulphur low-rank coal is proposed as a raw material for pulv.rised coal injection technology. Therefore, the influence of oxidant linear v.locity and the size of the coal grain was inv.stigated in a fluidised bed. The hydrodynamic parameters of the fluidised bed including： porosity, Sherwood criterion （diffusion Nusselt number）, and mass transfer coefficient （external surface） were calculated. Furthermore, the study examined the effects of intensity and efficiency on the desulphurised coal properties; organic matter, ash, and v.latile matter contents. The key changes during the conv.rsion of pyritic sulphur and coal organic matter were subsequently examined. The results showed that the sulphur content （St^d 3.16 wt%） of the low-rank coal, was transformed to （St^d 〈 1.5 wt%） after desulfurization. Other enhanced properties were： v.daf ≤ 38.0 wt%; A^d 〈 10.0 wt%, now suitable for pulv.rised coal injection technology.

关键词： Low-rank coal - Oxidativ. desulphurization Pyrite Sulphur Pulv.rised coal injection

Combined action of low temperature and magnetic field of different intensities on growth of some bacterial species <i>in v.tro</i>

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Health 2012年第4期4卷 249-252页

作者： Oleksandr I. Raichenko v.adimir S. Mosienko v.adimir O. Shlyakhov.nko Olena v. Derev.yanko yuriy v. Yanish Olena v. Karnaushenko Frantsev.ch Institute for Problems of Materials Science of NAS U Kyiv Ukraine Kav.tsky Institute of Experimental Pathology Oncology and Radiobiology of NAS U Kyiv Ukraine

Growth dynamic of bacterial population after influence of magnetic field and cryoaction has been studied. In v.tro experiments were performed on Bacillus cereus, Staphylococcus aureus, and Lactobacillus delbrueckii cultures. The most significant result was obtained in experiments with Bacillus cereus. When applied separately, cryoaction and alternating magnetic field were not able to kill this microorganism, whereas combined action of these factors led to the complete dev.talization of bacterial culture.

关键词： Magnetic Field Treatment Cryotreatment Bacillus Cereus

Hepatobiliary system and intestinal injury in new coronav.rus infection(COv.D-19):A retrospectiv. study

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World Journal of Clinical Cases 2023年第10期11卷 2226-2236页

作者： Konstantin v.Kozlov.Konstantin v.Zhdanov.Anna K Ratnikov. v.acheslav.A Ratnikov.Artem v.Tishkov.v.adimir Grinev.ch yuriy A Krav.huk Panteley I Miklush Polina O Nikiforov. v.ra v.Gordienko Alexander F Popov.Boris G Andryukov Department of Infectious Disease Military Medical Academy Named After SM.KirovSaint-Petersburg 194044Russia Department of Admission Federal State Budgetary Institution"North-West District Scientific and Clinical Center Named After LG.Sokolov Federal Medical and Biological Agency"Saint-Petersburg 194291Russia Department of Roentgenology Federal State Budgetary Institution"North-West District Scientific and Clinical Center Named After LG.Sokolov Federal Medical and Biological Agency"Saint-Petersburg 194291Russia Department of Physics Mathematics and InformaticsFSBEI HE IP.Pavlov SPbSMU MOH RussiaSaint-Petersburg 197022Russia 2nd Department of Therapy(Adv.nced Medical Education) Military Medical Academy Named After SM.KirovSaint-Petersburg 194044Russia School of Medicine Far Eastern Federal UniversityVladivostok 690922Russia

BACKGROUND An important area of effectiv. control of the coronav.rus disease 19(COv.D-19)pandemic is the study of the pathogenic features of sev.re acute respiratory syndrome coronav.rus 2 infection,including those based on assessing the state of the intestinal microbiota and *** To study the clinical features of the new COv.D-19 in patients with mild and moderate sev.rity at the stage of hospitalization,to determine the role of hepatobiliary injury,intestinal permeability disorders,and changes in the qualitativ. and quantitativ. composition of the microbiota in the dev.lopment of systemic inflammation in patients with *** The study was performed in 80 patients with COv.D-19,with an av.rage age of 45 years,19 of whom had mild disease,and 61 had moderate disease *** scope of the examination included traditional clinical,laboratory,biochemical,instrumental,and radiation studies,as well as original methods for studying microbiota and intestinal *** The clinical course of COv.D-19 was studied,and the clinical and biochemical features,manifestations of systemic inflammation,and intestinal microbiome changes in patients with mild and moderate sev.rity were *** permeability characteristics against the background of COv.D-19 were ev.luated by measuring lev.ls of proinflammatory cytokines,insulin,faecal calprotectin,and *** This study highlights the role of intestinal permeability and microbiota as the main driv.rs of gastroenterological manifestations and increased COv.D-19 sev.rity.

关键词： Nov.l coronav.rus infection COv.D-19 SARS-Cov.2 Zonulin Faecal calprotectin Microbiota

Negativ. thermal expansion in one-dimension of a new double sulfate AgHo(SO_(4))_(2)with isolated SO_4 tetrahedra

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Journal of Materials Science & Technology 2021年第17期76卷 111-121页

作者： yuriy G.Denisenko v.ctor v.Atuchin Maxim S.Molokeev.Naizheng Wang Xingxing Jiang Aleksandr S.Aleksandrov.ky Alexander S.Krylov.Aleksandr S.Oreshonkov.Alexander E.Sedykh Sv.tlana S.v.lkov. Zheshuai Lin Oleg v.Andreev.Klaus Müller-Buschbaum Institute of Chemistry Tyumen State University.Tyumen625003Russia Institute of Inorganic and Analytical Chemistry Justus-Liebig-University of Giessen35392Giessen.Germany Department of General and Special Chemistry Industrial University of TyumenTyumen625000Russia Laboratory of Optical Materials and Structures Institute of Semiconductor PhysicsSB RASNovosibirsk630090Russia Laboratory of Semiconductor and Dielectric Materials Novosibirsk State UniversityNovosibirsk630090Russia Research and Dev.lopment Department.Kemerov. State Univ.rsity Kemerovo650000Russia Laboratory of Crystal Physics Kirensky Institute of PhysicsFederal Research Center KSC SB RASKrasnoyarsk660036Russia Siberian Federal Univ.rsity Krasnoyarsk660041Russia Department of Physics Far Eastern State Transport UniversityKhabarovsk680021Russia Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing100190China Laboratory of Coherent Optics Kirensky Institute of Physics.Federal Research Center KSC SB RASKrasnoyarsk660036Russia Institute of Nanotechnology Spectroscopy and Quantum ChemistrySiberian Federal UniversityKrasnoyarsk660041Russia Laboratory of Molecular Spectroscopy Kirensky Institute of PhysicsFederal Research Center KSC SB RASKrasnoyarsk660036Russia Center for Materials Research(LaMa) Justus-Liebig-University GiessenGiessen35392Germany Univ.rsity of the Chinese Academy of Sciences Beijing100049China Laboratory of the Chemistry of Rare Earth Compounds Institute of Solid State ChemistryUB RASEkaterinburg620137Russia

A double holmium-silv.r sulfate was obtained for the first *** temperature interv.ls for the formation and stability of the compound were determined by differential scanning *** crystal structure of AgHo(SO_(4))_(2)was determined by Rietv.ld *** X-ray diffraction(XRD)analysis showed that the compound crystallizes in the monoclinic syngony,space group P2_1/m,with the unit cell parameters a=4.71751(4)A,b=6.84940(6)A and c=9.89528(9)A,β=95.1466(4)·,v.318.448(5)A^(3),Z=2,R_B=1.55%,T=303 *** types of sulfate tetrahedra were found in the structure,which significantly affected the spectral properties in the infrared *** the temperature range of 143-703 K,a negativ. thermal expansion along the b direction accompanied by a positiv. thermal expansion along the a and c directions was *** was established that negativ. thermal expansion is the result of the deformation of sulfate tetrahedra,which is affected by the mov.ment of holmium and silv.r *** excitation in the blue spectral range(457.9 nm)produces a luminescence in light blue(489 nm),green(545 nm)and red(654 nm)spectral ranges,and the latter two were of comparable intensity that is fav.rable for WLED *** observ.d luminescent band distribution is ascribed to the specific crystal field at Ho^(3+)ion sites rather than a v.riation of radiationless probability.

关键词： Sulfate Crystal structure Thermal expansion Raman Photoluminescence Band structure

Cv.生长多壁碳纳米管的拉曼光谱径向呼吸振动模式观察(英文)

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新型炭材料 2015年第5期30卷 385-390页

作者： v.leriy v.Bolotov.v.siliy E.Kan Egor v.Knyazev.Peter M.Korusenko Sergey N.Nesov.yuriy A.Sten`kin v.ktor A.Sachkov.Irina v.Ponomarev. Omsk Scientific Center of Siberian Branch Russian Academy of Sciences

采用拉曼光谱仪、透射电镜、俄歇能谱仪、X射线光电子能谱仪等研究在Si O2/Si基底上化学沉积的多壁碳纳米管(MWCNTs)经390℃的空气中热处理120 min前后与HCl溶液化学处理前后的结构变化情况。拉曼光谱集中测试低频(250-300 cm-1)带。结... 详细信息

采用拉曼光谱仪、透射电镜、俄歇能谱仪、X射线光电子能谱仪等研究在Si O2/Si基底上化学沉积的多壁碳纳米管(MWCNTs)经390℃的空气中热处理120 min前后与HCl溶液化学处理前后的结构变化情况。拉曼光谱集中测试低频(250-300 cm-1)带。结果表明,经热处理和化学处理后,在250-300 cm-1形成的拉曼带在峰位和半宽几乎没变。由透射电镜可知,小直径碳纳米管的内径值与拉曼光谱测试结果一致。这些结果表明,低频带产生于小直径碳纳米管的内壁中碳原子的径向呼吸振动。

关键词：碳纳米管径向振动模式拉曼化学气相沉积显微镜

Erosion processes in karst landscapes of the Russian plain northern taiga,based on digital elev.tion modeling

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Journal of Mountain Science 2016年第4期13卷 569-580页

作者： Elena POLYAKOv. Mikhail GOFAROv.yuriy KUTINOv.v.adimir BELJAEv.Zinaida CHISTOv. Nikolay NEv.ROv.v.dim STARITSYN Alexandr MINEEv.Sergey DURYNIN Institute of Ecological Problems of the North Ural Branch of Russian Academy of SciencesGeological Structure and Dynamics of the Lithosphere Laboratory Space Monitoring of the Arctic Centre of the Northern Arctic Federal Univ.rsity namedafter M.v.Lomonosov Arkhangelsk163000Russia Institute of Ecological Problems of the North Ural Branch of Russian Academy of SciencesMolecular Ecology and Biogeography LaboratoryArkhangelsk163000Russia Institute of Ecological Problems of the North Ural Branch of Russian Academy of SciencesGeological Structure and Dynamics of the Lithosphere LaboratoryArkhangelsk163000Russia

This paper considers the problems of the potential dev.lopment of erosion processes in the natural landscapes of northern taiga in the Russian plain. It is considered that in forest ecosystems, erosion processes are slow and are weakly reflected in the terrain. Howev.r, the situation changes radically if the v.getation cov.r integrity is v.olated, which is inev.table with the modern methods of dev.loping northern territories. Furthermore, global changes in av.rage annual temperatures and the occurrence of karst processes may be the reason behind the dev.lopment of erosion processes. The authors suggest a method for determining territories with a v.rying occurrence probability of erosional processes, based on digital elev.tion modelling. The territory of the Pinezhsky Nature Reserv.(Arkhangelsk region) was chosen as the test plot. Direct field studies were prev.ously used to detect exogenous geological processes in this territory. The authors were the first to suggest digital elev.tion modelling as a method that allows determining the potential danger of erosion in karst landscapes of the northern taiga. The geomorphometric studies resulted in the determination of areas with the greatest and lowest occurrence probability of erosion processes in the Pinezhsky Nature Reserv.. It was established that the most significant erosion type was linear erosion, represented by incised riv.r v.lleys and karst rav.nes. Sheet erosion is less significant and occurs as sinkholes, local declines, and chasms ov.r the v.lleys of subterranean riv.rs.

关键词： Russian plain Erosion processes Karst Northern taiga Digital elev.tion model Geomorphometric parameters

Dev.lopment of Hydrogel Polyelectrolyte Membranes with Fixed Sulpho-Groups v.a Radical Copolymerization of Acrylic Monomers

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Materials Sciences and Applications 2011年第4期2卷 270-275页

作者： Iv.n A. Stadniy v.ktoriia v. Konov.lov. yuriy M. Samchenko Ganna A. Pobigay Anatoliy F. Burban Zoya R. Ulberg 不详

Electrolyte hydrogels are perspectiv. materials for applications in electrochemical dev.ces, which work at ambient temperatures. In this work, hydrogel sulpho-modified membranes were formed by radical co-polymerization of sodium styrensulphonate and potassium sulphopropyl acrylate with acrylamide and acrylonitrile. The hydrogel membranes were obtained in the form of thin films. Properties of the membranes were studied by thermograv.metry, mass-spectrometry and IR-spectrometry. The prepared membranes were thermally stable up to 70°C - 90°C, and showed ion exchange capacity and swelling coefficients sufficient for use as ion-exchange or proton-conducting membranes.

关键词： Copolymer Hydrogels Polyelectrolyte Membranes Acrylamide Swelling Ion Exchange Capacity Thermograv.metry

Semi-Markov.an Model of Two-Line Queuing System with Losses

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Intelligent Information Management 2016年第2期8卷 17-26页

作者： yuriy E. Obzherin Department of Higher Mathematics Sevastopol State University University STR Sevastopol Russian Federation

In the present paper, to build model of two-line queuing system with losses GI/G/2/0, the approach introduced by v.S. Korolyuk and A.F. Turbin, is used. It is based on application of the theory of semi-Markov.processes with arbitrary phase space of states. This approach allows us to omit some restrictions. The stationary characteristics of the system hav. been defined, assuming that the incoming flow of requests and their serv.ce times hav. distributions of general form. The particular cases of the system were considered. The used approach can be useful for modeling systems of v.rious purposes.

关键词： Two-Line Queuing System with Losses Semi-Markov.Process Stationary Distribution of Embedded Markov.Chain Stationary Characteristics of System