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Novel Methodologies for preventing Crack propagation in Steel Gas pipelines Considering the Temperature Effect

Structural Durability & Health Monitoring 2025年第1期19卷 1-23页

作者： Nurlan Zhangabay Ulzhan Ibraimova Marco Bonopera Ulanbator Suleimenov Konstantin Avramov Maryna Chernobryvko Aigerim Yessengali Department of Architecture and Urban planning Mukhtar Auezov South Kazakhstan UniversityShymkent160012Kazakhstan Department of Industrial Civil and Road Construction Mukhtar Auezov South Kazakhstan UniversityShymkent160012Kazakhstan Mechanics Sound&Vibration LaboratoryDepartment of Civil EngineeringCollege of EngineeringNational Taiwan UniversityTaipei10617Taiwan Department of Reability&Dynamic Strength A.Pidhornyi Institute of Mechanical Engineering Problems of National Academy of Sciences of UkraineKharkiv61046Ukraine

Using the software ANSYS-19.2/Explicit Dynamics,this study performedﬁnite-element modeling of the large-diameter steel pipeline cross-section for the Beineu-Bozoy-Shymkent gas pipeline with a non-through straight crack,strengthened by steel wire *** effects of the thread tensile force of the steel winding in the form of single rings at the crack edges and the wires with different winding diameters and pitches were also *** results showed that the strengthening was preferably executed at a minimum value of the thread tensile force,which was 6.4%more effective than that at its maximum *** analysis of the inﬂuence of the winding dia-meters showed that the equivalent stresses increased by 32%from the beginning of the crack growth until the wire *** increment in winding diameter decelerated the disclosure of the edge crack and reduced its length by 8.2%.The analysis of the inﬂuence of the winding pitch showed that decreasing the distance between the winding turns also led to a 33.6%reduction in the length of the straight crack and a 7.9%reduction in the maximum stres-ses on the strengthened pipeline *** analysis of the temperature effect on the pipeline material,within a range from-40℃ to+50℃,resulted in a crack length change of up to 5.8%.As the temperature dropped,the crack length *** such a temperature range,the maximum stresses were observed along the cen-tral area of the crack,which were equal to 413 Mpa at+50℃ and 440 Mpa at-40℃.The results also showed that the presence of the steel winding in the pipeline signiﬁcantly reduced the length of crack propagation up to 8.4 times,depending on the temperature effect and design parameters of *** work integrated the existing methods for crack localization along steel gas pipelines.

关键词： Crack propagation ﬁnite-element internal pressure prestressing steel gas pipeline temperature effect

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Gasotransmitters as Key Members of the Signaling Network Regulating Stomatal Response:Interaction with Other Molecules

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phyton-International Journal of Experimental Botany 2024年第12期93卷 3151-3195页

作者： Yuriy E.Kolupaev Tetiana O.Yastreb Alexander p.Dmitriev Yuriev plant production institute National Academy of Agrarian Sciences of UkraineKharkiv61060Ukraine Department of plant protection Poltava State Agrarian UniversityPoltava36003Ukraine institute of Cell Biology and Genetic Engineering National Academy of Sciences of UkraineKyiv03143Ukraine

Stomatal closure,which serves to limit water loss,represents one of the most rapid and critical reactions of plants,occurring not only in response to drought but also to a range of other stressors,including salinity,extreme temperatures,heavy metals,gaseous toxicants,and pathogen *** is considered to be the main regulator of stomatal movements in plants under abiotic *** the last two decades,however,the list of plant hormones and other physiologically active substances that affect stomatal status has expanded *** is believed that stomata are regulated by a complex multicomponent network of compounds consisting of hormones and signaling mediators.A special place among them is occupied by gasotransmitters,endogenously synthesized gaseous compounds with signaling *** most studied of them are nitrogen monoxide(NO),hydrogen sulfide(H2S),and carbon monoxide(CO).Carbon dioxide(CO_(2)),not yet classified as a classical gasotransmitter,is also considered an important gaseous regulatory *** has been obtained on the ability of each of these gases to induce stomatal responses in *** are also involved as mediators in stomatal responses induced by various plant hormones and other compounds,particularly ABA,jasmonic and salicylic acids,brassinosteroids,and *** review examines the functional interactions between gasotransmitters at the level of influencing each other’s synthesis and interactions with other mediators,especially ROS and calcium ions,in their involvement in providing stomatal *** latest information on proteins involved in stomatal regulation and undergoing post-translational modification under the action of gasotransmitters,including protein kinases,ion channel proteins,aquaporins,pro-and antioxidant enzymes,is also *** possibilities of practical use of gasotransmitter donors as stress protective agents contributing to the normalization of plant water metabolism

关键词： Stomata gasotransmitters reactive oxygen species(ROS) post-translational modification of proteins plant resistance

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The polyhexamethyleneguanidine Stimulation of Seeds Growing and Cell proliferation

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材料科学与工程（中英文B版） 2013年第10期3卷 653-660页

作者： Lysytsya Andri Lyco Sergij portuhaj Oksana west p olissya agriculture institute of national academy of the agrarian sciences of ukraine Rivne 33028 Ukraine Rivne State University for Humanities Rivne 33028 Ukraine

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Structure and properties of Nanostructured Vacuum-Deposited Foils of Invar Fe–(35–38 wt%)Ni Alloys

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Journal of Materials Science & Technology 2015年第11期31卷 1079-1086页

作者： V.M.Nadutov A.I.Ustinov S.A.Demchenkov Ye.O.Svystunov V.S.Skorodzievski G.V.Kurdyumov institute for Metal physics of national academy of sciences of ukraine E.O.paton Electric Welding institute of national academy of sciences of ukraine

The process of electron beam vacuum deposition of the Fe-（35-38 wt%）Ni alloys at substrate temperatures Ts from 300 to700 ℃ were used to produce vacuum-deposited foils with the FCC structure, differing by the size of characteristic microstructural elements （grains and subgrains）. It was shown that refinement of foil microstructural elements to nanoscale is accompanied by their microhardness increase up to 4-5 Gpa. The change of the thermal expansion coefficient （TEC） of the nanostructured （NS） foil of the Fe-35.1Ni alloy within the temperature range from -50 to 150 ℃ has some deviation from that observed for cast Invar alloy of the same composition. It has been found that the main factors affecting the peculiarities of thermal expansion of the NS foil can be related to the presence of small fraction of BCC- phase in them, high level of crystalline lattice microstrains and inhomogeneous magnetic order in FCC- phase. It was shown that as a result of additional thermal treatment of NS foils their invar properties become similar to that observed for cast Invar alloy but mechanical properties remain on the same level.

关键词： Fe-Ni alloys Electron beam physical vapor deposition (EBpVD) Nanostructured materials Hardness Thermal expansion Mossbauer spectroscopy

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3d-visualization of magnesium strengthening mechanisms for a description of experimentally obtained data of alloying effect in Mg-Ga system

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Journal of Magnesium and Alloys 2020年第2期8卷 546-551页

作者： J.A.Khokhlova M.A.Khokhlov paton Electric Welding institute of national academy of sciences of ukraine KyivUkraine

Based on laws of theory of materials strengthening were discribed the experimentally obtained alloying effect in Mg-Ga system and shown using program for 3d atomic *** known from our experiments a homogeneous"wavy"microstructure of the diffusion zone forms as result of mass-transfer of molten gallium into the volume of magnesium *** chemical composition shows Mg 65%*** Ga 35%*** X-ray spectra diffraction data-Mg5Ga2 intermetallic phase *** intermetallic diffusion zone provides the significant strengthening effect of microstructure which was determined experimentally by the indentation *** 3-d visualization shows the reaction and changing of an original crystal structure of magnesium atomic lattice upon diffusion doping with foreign atoms of gallium and then is shown the coalescence of Mg5Ga2 intermetallic crystal with crystals surfaces of ***,investigated Mg-alloy strengthening at alloying with Ga explained by two main *** first is the formation of intermetallic phases with the ordering and consolidation of the crystal structure of the matrix by the ligature atoms,which is the key factor of the strengthening mechanism fixed ***,when hexagonal and orthorhombic atomic structures growth according to their spatial type,a significant disorientation of structural fragments occurs,an increase in the density of the amorphous transition layer,a twinning of the structure in the interphase boundaries,which leads to the formation of intrinsic mutual deformation and a high level of internal stresses.

关键词： Magnesium Gallium Alloying Strengthening Atom 3d

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Triggering of Major Brain Disorders by protons and ATp:The Role of ASICs and p2X Receptors

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Neuroscience Bulletin 2023年第5期39卷 845-862页

作者： Andri Cherninskyi Maksim Storozhuk Oleksandr Maximyuk Vyacheslav Kulyk Oleg Krishtal Bogomoletz institute of physiology of national academy of sciences of ukraine Kyiv 01024Ukraine

Adenosine triphosphate(ATp)is well-known as a universal source of energy in living *** known is that this molecule has a variety of important signaling func-tions:it activates a variety of specific metabotropic(p2Y)and ionotropic(p2X)receptors in neuronal and non-neu-ronal cell ***,a wide variety of signaling func-tions well fits the ubiquitous presence of ATp in the *** more ubiquitous are *** from the unspe-cific interaction of protons with any protein,many physi-ological processes are affected by protons acting on specific ionotropic receptors--acid-sensing ion channels(ASICs).Both protons(acidification)and ATp are locally elevated in various pathological *** these fundamentally important molecules as agonists,ASICs and p2X receptors signal a variety of major brain *** we briefly outline the physiological roles of ASICs and p2X receptors,focusing on the brain pathologies involving these receptors.

关键词： ASICs p2X receptors Stroke Chronic pain Epilepsy Neurodegenerative psychiatric diseases

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An Exact Solution for Heat Transfer of a Jet Co-Axially Impinging on a Rotating Disk and Its Comparisons with Stagnation point Experiments

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Journal of Thermal Science 2002年第1期11卷 53-59页

作者： I.V. Shevchuk (institute of Engineering Thermophysics, Ukrainian national academy of sciences, 2a, Zhelyabov St., Kiev, 03057, ukraine. E-mail: ivshevch@i.com.ua) institute of Engineering Thermophysics Ukrainian National Academy of Sciences Ukraine

An exact solution of laminar heat transfer problem for a uniform flow perpendicular to a rotating disk was obtained. Radial velocity at the outer edge of the boundary layer increases linearly in the radial direction, while the temperature difference between the disk and outer flow follows a power law. The problem is solved using self-similar velocity and temperature profiles. Nusselt numbers were computed for the prandtl numbers pr=1 and 0.71 at different values of parameters affecting flow and heat transfer. Special flow regime was identified where rotating disk heat transfer is determined only by peculiarities of the impinging flow. Results of predictions agree well with known experiments in the vicinity of the stagnation point.

关键词： impinging jet rotating disk Nusselt number laminar flow heat transfer boundary layer exact solution

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Localized States of an Excess Electron in an Ionic Cluster

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Communications in Theoretical physics 2013年第12期60卷 738-746页

作者： K.V.Grigorishin B.I.Lev Boholyubov institute for Theoretical physics of the national academy of sciences of ukraine

A theory of an electron affinity for an ionic cluster is proposed both in a quasiclassical approach and with quantization of a polarization electric field in a nanopartiele. A critical size of the cluster regarding in formation of an electron＇s autolocalized state, dependencies of energy and radius of a polaron on a cluster＇s size are obtained by a variational method. It has been found that binding energy of the electron in the cluster depends on a eluster＇s radius but a radius of electron＇s auto-localization does not depend on the cluster＇s radius and it equals to the polaron radius in a corresponding infinity crystal. A bound state of the electron in a cluster is possible only if the duster＇s radius is more than the polaron radius.

关键词： cluster polaron autolocalization phonon comfinement

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New Taxa of Chrysomelidae (Insecta:Coleoptera) from Rovno Amber,Late Eocene

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Acta Geologica Sinica(English Edition) 2010年第4期84卷 772-782页

作者： Konstantin NADEIN Evgeny pERKOVSKY Schmalhausen institute of Zoology National Academy of Sciences of UkraineKievUkraine

Leaf beetles Chrysomelidae of Rovno amber, from the Late Eocene, are recorded and described. Chrysomelidae of Rovno amber are represented by three subfamilies： Galerucinae （Alticini）, Chrysomelinae, and Enmolpinae. Two new genera and three new species of Alticini： Manobiomorpha Nadein, gen. nov. （type species Manobiomorpha eocenica Nadein, sp. nov.）, psyllototus Nadein, gen. nov. （type species psyUototus progenitor Nadein, sp. nov.）, and Crepidodera decolorata Nadein et perkovsky, sp. nov. are described. A new chrysomeline genus and species paleophaedon minutus Nadein gen. nov. et sp. nov. is described. probable trophic association of Crepidodera decolorata sp. nov., the taxonomic positions of Manobiomorpha gen. nov. and psyUototus gen. nov., and the composition of leaf beetle faunas of Middle and Late Eocene of Europe are discussed.

关键词： Chrysomelidae Rovno amber Late Eocene new genera new species

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Effect of CeO_2 and Al_2O_3 on the activity of pd/Co_3O_4/cordierite catalyst in the three-way catalysis reactions(CO/NO/C_nH_m)

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Journal of Environmental sciences 2012年第7期24卷 1327-1333页

作者： Sergiy O.Soloviev pavlo I.Kyriienko Nataliia O.popovych L.V.pisarzhevsk institute of physical Chemistry National Academy of Sciences of Ukraine

The present article studies the effect of CeO2 and A1203 on the activity of pd/Co304/cordierite catalyst in conversion of NO, CO, CnHm. The catalysts were characterized by temperature programmed reduction with hydrogen, X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy. It is shown that the effect of CeO2 on the properties of pd/C03 O4/cordierite catalyst depends on preparation method. The catalyst obtained by co-deposition of cerium and cobalt oxides has higher activity in CO oxidation （CO ＋ 02 and CO ＋ NO） and total hexane oxidation （C6H14 ＋ 02）. Such phenomenon is probably caused by more than stoichiometric amount of formed oxygen vacancies, an increase in both mobility of surface oxygen and dispersity of components in the catalytic composition. It is demonstrated that CeO2 addition promotes the SO2 resistance of pd/C03 O4/cordierite. The second support decreases the activity of pd/Co3Oa/cordierite catalyst in the reactions of CO and C6H14 with oxygen because of COA1204 formation.

关键词： metal-oxide catalysts structured catalysts effect of CeO2 and A1203 CO NO CnH,. conversion

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