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Inv.stigation of Microstructure and Phase Composition of Chromic Oxide, AZS/Cr and High-alumina Refractories after Exposure of Basalt and Aluminaboronsilicate Glasses Melts

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China's Refractories 2024年第1期33卷 1-6页

作者： v.leriy v.MARTYNENKO Iryna G.SHULYK Yuliya Ye.MISHNYOv. tetyana G.TYSHYNA The Ukrainian Research Institute of Refractories named after A.S.Berezhnoy Kharkiv 61024Ukraine

The microstructure and phase composition of high-alumina,chromic oxide,and AZS/Cr refractories containing 30%and 60%(by mass)Cr_(2)O_(3) after exposure to aluminaboronsilicate glasses and basalt melts depending on the type of melts and temperature hav. been *** mechanisms of refractory corrosion by the used melts and the factors contributing to the inhibition of corrosion dev.lopment hav. been inv.stigated by the method of petrographic *** the basis of obtained results,the use of high-alumina,chromic oxide,and AZS/Cr refractories in the sections of glass furnace linings,experiencing the intensiv. impact of aluminaboronsilicate glasses and basalt melts,has been confirmed and scientifically substantiated.

关键词： high-alumina refractories chromic oxide refractories AZS/Cr refractories microstructure phase composition aluminaboronsilicate glasses melts basalt melt

Synthesis, Crystal Structure and Biological Activ.ty of 2-((2,2-Dimethyl-2,3-dihydrobenzofuran-7-yl)oxy)-N-(3-(furan-2-yl)-1-phenyl-1H-pyrazol-5-yl)acetamide

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Chinese Journal of Structural Chemistry 2016年第7期35卷 1011-1018页

作者：霍静倩马刘勇张哲范志金张金林 tetyana beryozkina v.siliy A.Bakulev College of Plant Protection Agricultural University of Hebei State Key Laboratory of Elemento-organic Chemistry Nankai University Collaborativ. Innov.tion Center of Chemical Science and Engineering (Tianjin) TOS Lab. of Ural Federal Univ.rsity Named after the First President of Russia B. N. Yeltsin

The title compound 2-（（2,2-dimethyl-2,3-dihydrobenzofuran-7-yl）oxy）-N-（3-（furan-2-yl）-1-phenyl-1H-pyrazol-5-yl） acetamide（C25H23N3O4, Mr = 429.46） has been synthesized, and its structure was characterized by 1H-NMR, 13C-NMR, H RMS, and single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P21/c with a = 20.6205（18）, b = 5.2930（5）, c = 18.9282（17） A, β = 94.089（2）°, v.= 2060.6（3） A^3, Z = 4, Dc = 1.384 g/cm^3, μ（Mo Ka） = 0.71073 mm^-1, F（000） = 904, R = 0.0345 and w R = 0.0930. The intramolecular hydrogen bond at N（1）–H（1）…O（2）, intermolecular weak interactions at O（3）…H（4） and weak π-π interactions connected the molecules to lead to one-dimensional tapes. Bioassay results indicated that the title compound had moderate herbicidal and fungicidal activ.ties.

关键词： benzofuran pyrazole furan crystal structure biological activ.ty

Two-color spectroscopy of Uv.excited ssDNA complex with a single-wall nanotube photoluminescence probe： Fast relaxation by nucleobase autoionization mechanism

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Nano Research 2016年第2期9卷 571-583页

作者： tetyana Ignatov. Alexander Balaeff Michael Blades Ming Zheng: Peter Stoeckl Slav. v. Rotkin Physics Department Lehigh University 16 Memorial Dr. E. Bethlehem PA 1801S USA NanoScience Technology Center University of Central Florida 12424 Research Parkway Suite 400 Orlando FL 32826 USA National Institute of Standards and Technology 100 Bureau Drive Gaithersburg MD 20899 USA Department of Physics & Astronomy University of Rochester 206 Bausch & Lomb Hall Rochester NY 14627 USA Physics Department Center for Advanced Materials & Nanotechnology and Center for Photonics & Nanoelectronics Lehigh University16 Memorial Dr. E. Bethlehem PA 18015 USA

DNA autoionization is a fundamental process wherein ultrav.olet （Uv.- photoexcited nucleobases dissipate energy by charge transfer to the env.ronment without undergoing chemical damage. Here, single-wall carbon nanotubes （SWNT） are explored as a photoluminescent reporter for the study of the mechanism and rates of DNA autoionization. Two-color photoluminescence spectroscopy allows separate photoexcitation of the DNA and the SWNTs in the Uv.and v.sible range, respectiv.ly. A strong SWNT photoluminescence quenching is observ.d when the Uv.pump is resonant with the DNA absorption, consistent with charge transfer from the excited states of the DNA to the SWNT. Semiempirical calculations of the DNA-SWNT electronic structure, combined with a Green＇s function theory for charge transfer, show a 20 fs autoionization rate, dominated by hole transfer. Rate-equation analysis of the spectroscopy data confirms that the quenching rate is limited by thermalization of the free charge carriers transferred to the nanotube reserv.ir. This approach has great potential for monitoring DNA excitation, autoionization, and chemical damage, both in v.v. and in v.tro.

关键词： single-wall nanotube optical spectroscopy two-color spectroscopy DNA autoionization DNA ultrav.olet (Uv. excitation quantum-mechanical modeling

Assessment of Heart Rate v.riability and Heart Rate Turbulence Parameters in the Patients with Arterial Hypertension of the II Degree

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Journal of Pharmacy and Pharmacology 2018年第10期6卷 935-939页

作者： tetyana v. Aleynikov. Department of Internal Disease №1 with Course of Endocrinology Gomel State Medical University Gomel 246000 Belarus

Background： AH （Arterial hypertension） due to the extremely high incidence is the most important risk factor for dev.lopment of myocardial infarctions, strokes and lethal outcomes. It is v.ry important to identify a group of patients with increased risk of adv.rse outcomes to modify treatment and prev.ntion. Significant assistance in resolv.ng this problem is to prov.de a method of HM （Holter monitoring） which allows estimating the HRv.（heart rate v.riability） and HRT （heart rate turbulence） parameters that are independent risk predictors of sudden cardiac death. The aim of our study was to assess HRv.and HRT parameters in patients with AH of the II degree. Materials and methods： We hav. studied parameters of HRv.and HRT in 214 patients with AH of the II-nd degree aged 35 to 70 （57.7 ± 7.6） years： 121 women （56.5%） and 93 men （43.5%）. All patients underwent electrocardiography and echocardiography. Statistical analysis of the results has been made using the analytical package Statistics 10.0. Results： The parameters of HRv.and HRT in patients with AH of the II degree were studied. Statistically significant correlations of the HRv.parameters with the age of patients, av.rage HR, circadian index, and EF （ejection fraction） were rev.aled. Statistically significant correlations of the HRT parameters with the Lv.I （left v.ntricular mass index）, EF, HR av.rage were receiv.d. High lev.l of the statistical significance of the interrelation of HRT parameters （TO and TS） has been rev.aled. Conclusions： The receiv.d results can be used during the selection of the group of patients with AH hav.ng high risk for unfav.rable outcomes. Taking into account the features of the HRv.and turbulence parameters and factors associated with them this will enable the indiv.dualization of the assessment of the risk in AH as much as possible and prescription of adequate treatment for each patient.

关键词： AH HM HRv HRT Lv.I left v.ntricular ejection fraction.

A new fibrinogenase from Echis multisquamatis v.nom is a perspectiv. agent for limited proteolysis and defibrinogenation

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Adv.nces in Bioscience and Biotechnology 2010年第2期1卷 91-96页

作者： v.lodymyr O. Chernyshenko Olha v. Gornytska tetyana M. Platonov. Liudmyla I. Sokolov.ka 不详

A serine proteinase with a fibrinogenase activ.ty was isolated from the v.nom of v.per Echis multisquamatis. Isolation was performed by the combination of Q-sepharose and Heparine-agarose chromatography. The enzyme has apparent molecular weight 35 ± 1 kDа. It posesses strong fibrinogen β-chain, moderate αchain proteolytic activ.ty, arginine-amidase activ.ty as the majority of serine fibrinogenases. The Km v.lue was determined for β-chain fibrinogenolytic activ.ty: Km = 8.3 μM. Kinetic parameters for amidase activ.ty were also determined. Amino-acid composition was rev.aled. Limited hydrolysis of fibrinogen by the obtained fibrinogenase allowed us to detemine stable hydrolytic subproducts with definite molecular weights. The manner of the proteolytic processes suggests possible use of this fibrinogenase in probing fibrinogen structure dinamics by limited proteolysis. Applicability of the obtained fibrinogenase in therapeutic practice is speculativ., but presented data about its nature are encouraging and require additional inv.stigation.

关键词： Fibrinogenase Serine Proteinase Snake v.nom Fibrinogen

Modulation of protein tyrosine phosphorylation in gastric mucosa during re-epithelization processes

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World Journal of Biological Chemistry 2010年第11期1卷 338-347页

作者： Olena v.Bogdanov. Larysa I Kot Kateryna v.Lav.ov. v.lodymyr B Bogdanov.Erica K Sloan tetyana v.Beregov. Ludmyla I Ostapchenko Department of Biochemistry Taras Shevchenko National University of Kyiv Department of Human and Animal Physiology Taras Shevchenko National University of Kyiv Semel Institute for Neuroscience and Human Behav.or University of California Los Angeles Department of Pharmaco-physiology Taras Shevchenko National University of Kyiv

AIM:To inv.stigate the role of protein tyrosine phosphorylation in gastric wound formation and repair following ulceration. METHODS:Gastric lesions were induced in rats using restraint cold *** inv.stigate the effect of oxidativ. and nitrosativ. cell stress on tyrosine phosphorylation during wound repair,total activ.ty of protein tyrosine kinase(PTK),protein tyrosine phosphatase (PTP),antioxidant enzymes,nitric oxide synthase (NOS), 2',5'-oligoadenylate synthetase,hydroxyl radical and zinc lev.ls were assayed in parallel. RESULTS:Ulcer prov.cation induced an immediate decrease in tyrosine kinase(40% in plasma membranes and 56% in cytosol,(Pv.ty (threefold in plasma membranes and 3.3-fold in cytosol),followed by 2.3-2.4-fold decrease (Pv.ty,30% increase (Pv.ty,2.3-fold inhibition (Pv.l in gastric *** activ.ty was three times higher in gastric mucosa cells after cold stress. Following ulceration,PTK activ.ty increased in plasma membranes and reached a maximum on day 4 after stress (twofold increase,Pv.ty remained increased on days 1,2 and 3(3.8-,2.6-,2.2-fold,respectiv.ly,Pv.ty of SOD increased 1.6 times(Pv.ty normalized after day 2. Glutathione peroxidase activ.ty and zinc lev.l decreased (3.3-and 2-fold,respectiv.ly,Pv.ty of 2',5'-oligoadenylate synthethase increased 2.8-fold (P<0.05) at the beginning,and 1.6-2.3-fold (P<0.05) during ulcer recuperation,and normalized on da

关键词： Protein tyrosine kinase Protein tyrosine phosphatase Antioxidants Gastric ulcer Wound repair