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Diagnostic value ultrasound signs of stones less than or equal to 10 mm and clinicoradiological variants of ureteric colic

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Asian Journal of Urology 2023年第1期10卷 39-49页

作者： Denis V.Krakhotkin volodymyr A.Chernylovskyi Kemal Sarica Arman Tsaturyan Evangelos Liatsikos Jurijus Makevicius Nikolay Yu Iglovikov Dmitry N.Pikhovkin Central District Hospital Outpatient ClinicSadovaya Lane 23KamenolomniRostov RegionRussia Private Urological Practice DniproUkraine Department of Urology Biruni University HospitalInstanbulTurkey Department of Urology University Hospital of PatrasPatrasGreece Department of Urology Medical University of ViennaViennaAustria Institute for Urology and Reproductive Health Sechenov UniversityMoscowRussia Institute of Clinical Medicine Faculty of MedicineVilnius UniversityVilniusLithuania Department and Clinic of Urology S.M.Kirov Military Medical Academy of the Ministry of Defense of the Russian FederationSt.PetersburgRussia Central District Hospital Department of SurgeryLenina Avenue 28AksayRostov RegionRussia

Objective:To determine the diagnostic value of ultrasound signs of urinary stones less than or equal to 10 mm and to determine clinico-radiological variants of ureteric ***:A total of 455 ultrasound investigations were performed in patients referring to emergency department with urolithiasis and symptoms suspected of ureteric colic between January 2021 and May *** addition to microscopic evaluation of urine sediment to detect different crystals and non-contrast spiral computed tomography to detect stones,B-mode and color Doppler sonography was performed to assess the presence of acoustic shadow(AS)and twinkle artifacts(TA)as possible signs of stone(s)in ***:While the sensitivity and specificity of AS and TA were higher than 90%in patients with stones greater than 5 mm;positive prognostic values of these parameters were found to be extremely low for stones with sizes of 1-3 mm with specificity and sensitivity values not exceeding 53%.The sensitivity and specificity of AS and TA in the upper and lower ureters were higher for stones greater than or equal to 5 than for compared to those less than 5 *** the same time,the diagnostic values of TA and AS for middle ureter stones were very *** most prevalent clinico-radiological variants of ureteric colic were types I,III,and V being observed in 39%,28% and 21% cases,***:Our results demonstrate that TA and AS parameters seem to have a very low sensitivity and specificity in the diagnosis of urinary stones less than 5 *** diagnostic value of TA and AS increase significantly in stones greater than or equal to 5 ***,clinicians need to be very careful for overestimating the diagnostic values of TA and AS for stones less than 5 mm and non-contrast spiral computed tomography must be the method of choice for patients presenting to emergency department with ureteric colic.

关键词： Ureteric colic Urolithiasis Ultrasound Twinkle artifact Non-contrast computed tomography

316L表面激光熔覆复合等离子体电解氧化制备多孔陶瓷涂层及其生物应用

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Transactions of Nonferrous Metals Society of China 2022年第9期32卷 2993-3004页

作者：吴国龙张烁王晔孙敏张群莉 volodymyr KOVALENKO 姚建华浙江工业大学机械工程学院杭州310014 浙江工业大学激光先进制造研究院杭州310014 浙江工业大学高端激光制造设备协同创新中心杭州310014 Laser Technology Research Institute National Technical University of Ukraine“Kiev Polytechnic Institute”Kiev03056Ukraine

为了提高316L不锈钢的生物活性,采用激光熔覆(LC)技术在316L不锈钢表面制备钛层,然后利用等离子体电解氧化(PEO)技术在钛层上形成多孔陶瓷涂层。采用三维表面轮廓仪、SEM、EDS、XRD和XPS等测试方法对涂层试样的形貌、微观结构和组成进... 详细信息

为了提高316L不锈钢的生物活性,采用激光熔覆(LC)技术在316L不锈钢表面制备钛层,然后利用等离子体电解氧化(PEO)技术在钛层上形成多孔陶瓷涂层。采用三维表面轮廓仪、SEM、EDS、XRD和XPS等测试方法对涂层试样的形貌、微观结构和组成进行表征。通过动电位极化曲线和模拟体液(SBF)浸泡试验,分别对涂层的耐腐蚀性和生物活性进行评价。结果表明,多孔陶瓷涂层主要由锐钛矿和金红石组成,并检测到高结晶HA。陶瓷涂层的主要元素为Ca、P、Ti和O。在模拟体液中,LC+PEO复合生物涂层比316L基质具有更优异的耐腐蚀性,并且复合涂层能有效提高316L不锈钢的生物活性。

关键词： 316L不锈钢激光熔覆钛等离子体电解氧化生物活性

On the Construction and Classification of the Common Invariant Solutions for Some P(1,4) -Invariant Partial Differential Equations

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Applied Mathematics 2023年第11期14卷 728-747页

作者： Vasyl M. Fedorchuk volodymyr I. Fedorchuk Pidstryhach Institute for Applied Problems of Mechanics and Mathematics National Academy of Sciences of Ukraine Lviv Ukraine

We consider the following (1 + 3)-dimensional P(1,4)-invariant partial differential equations (PDEs): the Eikonal equation, the Euler-Lagrange-Born-Infeld equation, the homogeneous Monge-Ampère equation, the inhomogeneous Monge-Ampère equation. The purpose of this paper is to construct and classify the common invariant solutions for those equations. For this aim, we have used the results concerning construction and classification of invariant solutions for the (1 + 3)-dimensional P(1,4)-invariant Eikonal equation, since this equation is the simplest among the equations under investigation. The direct checked allowed us to conclude that the majority of invariant solutions of the (1 + 3)-dimensional Eikonal equation, obtained on the base of low-dimensional (dimL ≤ 3) nonconjugate subalgebras of the Lie algebra of the Poincaré group P(1,4), satisfy all the equations under investigation. In this paper, we present obtained common invariant solutions of the equations under study as well as the classification of those invariant solutions.

关键词： Symmetry Reduction Classification of Invariant Solutions Common Invariant Solutions The Eikonal Equations The Euler-Lagrange-Born-Infeld Equations The Monge-Ampère Equations Classification of Lie Algebras Nonconjugate Subalgebras Poincaré Group P(1 4)

Probing thermally-induced structural evolution during the synthesis of layered Li-, Na-, or K-containing 3d transition-metal oxides

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eScience 2022年第2期2卷 183-191页

作者： Weibo Hua Xiaoxia Yang Nicola PMCasati Laijun Liu Suning Wang volodymyr Baran Michael Knapp Helmut Ehrenberg Sylvio Indris School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'anShaanxi710049China Institute for Applied Materials(IAM) Karlsruhe Institute of Technology(KIT)Hermann-von-Helmholtz-Platz 1D-76344Eggenstein-LeopoldshafenGermany College of Materials Science and Engineering Guilin University of TechnologyGuilin541004China Paul Scherrer Institut(PSI) WLGA/2295232Villigen PSISwitzerland Deutsches Elektronen-Synchrotron(DESY) Notkestr.85Hamburg22607Germany

Layered alkali-containing 3d transition-metal oxides are of the utmost importance in the use of electrode materials for advanced energy storage applications such as Li-,Na-,or K-ion batteries.A significant challenge in the field of materials chemistry is understanding the dynamics of the chemical reactions between alkali-free precursors and alkali species during the synthesis of these *** this study,in situ high-resolution synchrotron-based X-ray diffraction was applied to reveal the Li/Na/K-ion insertion-induced structural transformation mechanism during high-temperature solid-state *** in situ diffraction results demonstrate that the chemical reaction pathway strongly depends on the alkali-free precursor type,which is a structural matrix enabling phase *** phase analysis identifies for the first time the decomposition of lithium sources as the most critical factor for the formation of metastable intermediates or impurities during the entire process of Li-rich layered Li[Li_(0.2)Ni_(0.2)Mn_(0.6)]O_(2) *** the alkali ions have different ionic radii,Na/K ions tend to be located on prismatic sites in the defective layered structure(Na_(2/3-x)[Ni_(0.25)Mn_(0.75)]O_(2) or K_(2/3-x)[Ni_(0.25)Mn_(0.75)]O_(2))during calcination,whereas the Li ions prefer to be localized on the tetrahedral and/or octahedral sites,forming O-type structures.

关键词： In situ sXRD Structural evolution 3d transition-metal oxides Layered structure High-temperature solid-state reaction

Analysis of EX5del4232ins268 and EX5del955 PAH gene mutations in Ukrainian patients with phenylketonuria

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Genes & Diseases 2017年第2期4卷 108-110页

作者： volodymyr Pampukha Maryna Nechyporenko Ludmila Livshyts Institute of Molecular Biology and Genetics of the National Academy of Sciences of Ukraine Department of Human Genomics150Zabolotnogo str.03680 KyivUkraine

Phenylketonuria(PKU)is an autosomal recessive metabolic disorder caused by deficiency of phenylalanine hydroxylase(PAH).The major molecular defects causing PKU are missense mutations of PAH *** deletions of exon 5(EX5del955 and EX5del4232ins)were first reported by the Czech study and were later found also in the Polish,Slovak,Slovenian and Italian *** observations demonstrate the existence of a common subset of this mutation predominantly among Central European populations of Slavic *** is why we suggest that EX5del1955 and EX5del4232ins268 mutations might be frequent causes of PKU in Ukrainian ***5del955 and EX5del4232ins268 mutations were analyzed in 106 unrelated PKU patients negative for PAH gene mutations on one or both alleles from our previous *** simultaneous detection of EX5del4232ins268 and EX5del955 mutations was performed by PCR amplification of mutant ***5del955 mutation was not detected in the Ukrainian *** relative alleles frequency of EX5del4232ins268 mutation in the Ukrainian PKU population was determined as 1,66%.Our findings can be the one more evidence of Central European Slavic origin of EX5del4232ins268 mutation,suggested *** finding is important for the improvement of DNA diagnosis necessary for the management of PKU patients from Ukraine.

关键词： Large deletions Mutation analysis Phenylalanine hydroxylase Phenylketonuria

Pharmacological induced target temperature management after cardiac arrest： the capsaicinoids

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Neural Regeneration Research 2017年第10期12卷 1623-1624页

作者： J.Marc Simard Xiaofeng Jia volodymyr Gerzanich Department of Neurosurgery University of Maryland School of MedicineBaltimoreMDUSA Department of Orthopedics University of Maryland School of MedicineBaltimoreMDUSA Department of Anatomy and Neurobiology University of Maryland School of MedicineBaltimoreMDUSA Department of Biomedical Engineering Johns Hopkins University School of MedicineBaltimoreMDUSA Department of Anesthesiology and Critical Care Medicine Johns Hopkins University School of MedicineBaltimoreMDUSA

Cardiac or respiratory arrest lasting only a few minutes can inflict grave harm on numerous bodily organs, not least of all, the brain. Neurocognitive deficits, which are often severe and profoundly life altering, rem... 详细信息

关键词： Pharmacological induced target temperature management after cardiac arrest:the capsaicinoids

Lignite oxidative desulphurization Notice *** condition selection

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International Journal of Coal Science & Technology 2014年第1期1卷 62-69页

作者： volodymyr Gunka Serhiy Pyshyev Institute of Chemistry and Chemical Technologies Lviv Polytecnic National University12 Bandery Str.Lviv 79013Ukraine

The process of lignite desulphurization via its treatment by an oxidant(air or air–steam mixture)has been *** research objective was useful determination of steam application in oxidative lignite *** has been proved that the water steam should be included in the oxidant composition to increase the hydrogen sulphide and combustible constituent content in the gases obtained during the processes under *** impact of factors which affect the reactions between solid(in our case–lignite)and gaseous reagent(oxidant,*** and or air–steam mixture)upon the research process has been investigated,if these reactions occur in the kinetic *** factors are linear rate of oxidant movement and coal grain *** values of oxidant movement linear rate and coal grain size,which the reaction transfer from pyrite sulphur and organic content of lignite from diffusion into kinetic area occurs by,have been *** these‘‘transfer’’conditions,the values of coefficients of oxidant mass transfer(β,m/s)as well as Sherwood criteria and boiling layer differences have been calculated.

关键词： Lignite Oxidative desulphurization Pyrite Sulphur Hydrogen sulphide

Lignite oxidative desulphurization. Notice 2： effects of process parameters

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International Journal of Coal Science & Technology 2015年第3期2卷 196-201页

作者： volodymyr Gunka Serhiy Pyshyevt Institute of Chemistry and Chemical Technologies LvivPolytecnic National University 12 Bandery Str. Lviv 79013Ukraine

The influence of main characteristics upon conversion directions of the lignite organic part during its oxidation desulphurization was studied. The optimum temperature values, the ratio oxidant : raw material, and time of coal stay in the reaction zone, which provide the maximum degree of sulphur conversion and hydrogen sulphide content in desulphurization gases, were calculated. The process implemented under these conditions will decrease environment pollution by sulphur dioxide during further lignite burning at least to 55 %–60 % and utilize sulphur in coal in the form of desulphurization gases with hydrogen sulphide content of 7 %. Such gases can be reprocessed by the known methods of obtaining sulphur. The effect of the above three factors on the depth and character of the coal organic matter transformation was studied.

关键词：氧化脱硫工艺参数褐煤脱硫过程硫转化率环境污染二氧化硫煤炭脱硫

Synthesis of ferromagnetic La1-xSrxMnO3 nanoparticles by precipitation from diethylene glycol solution and their properties

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Journal of Advanced Ceramics 2016年第3期5卷 197-203页

作者： Yulia SHLAPA Sergii SOLOPAN Oleksandr YELENICH volodymyr TRACHEVSKII Anatolii BELOUS V.I.Vernadsky Institute of General and Inorganic Chemistry NAS of Ukraine32/34 Palladina Avenue 03680 Kyiv 142 Ukraine Technical Center NAS of Ukraine

La1−x Sr x MnO3 nanoparticles were synthesized by precipitation from diethylene glycol solution. Features of synthesis were studied using 1Н, 13С, 139La... 详细信息

La1−x Sr x MnO3 nanoparticles were synthesized by precipitation from diethylene glycol solution. Features of synthesis were studied using 1Н, 13С, 139La nuclear magnetic resonance (NMR) investigations. The obtained results showed that the complexation reaction between diethylene glycol and metal cations takes place during the synthesis. These complexes decomposed at 200 °C and an amorphous precursor (La,Sr)MnO3 was formed. According to X-ray results, the crystallization of the perovskite structure began at 600 °C and finished at 800 °C. Microstructural studies showed that obtained nanoparticles are weakly agglomerated and have small sizes. Based on these nanoparticles, magnetic fluid was prepared which was effectively heated under an alternating magnetic field.

关键词： manganite perovskite precipitation complexation reaction diethylene glycol nuclear magnetic resonance (NMR)