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Burns & Trauma 2014年第4期2卷 187-195页

作者： Rostislav v.shevchenko Matteo Santin Pharmidex Pharmaceutical Services Ltd London Brighton Centre for Regenerative Medicine University of BrightonBrightonUnited Kingdom

in the last decade,a new class of natural biomaterials derived from de-fatted soybean fl our processed by either thermoset or extraction procedures has been *** biomaterials uniquely combine adaptability to various clinical applications to proven tissue regeneration *** the present work,the biomaterials were formulated either as hydrogel or as paste formulation and their potential as wound dressing material or as dermal substitute was assessed by two in vivo models in pig skin:The healing full-thickness punch biopsy model and the non-healing full-thickness polytetrafl uoroethylene(PTFE)chamber *** results clearly show that collagen deposition is induced by the presence of these biomaterials.A unique pattern of early infl ammatory response,eliciting neutrophils and controlling macrophage infi ltration,is followed by tissue cell colonization of the wound bed with a signifi cant deposition of collagen fi *** study also highlighted the importance in the use of optimal formulations and appropriate handling upon *** large size,non-healing wounds,wound dermis was best obtained with the paste formulation as hydrogels appeared to be too loose to ensure lasting scaff olding *** the contrary,packing of the granules during the application of paste reduced biomaterial degradation rate and prevent the penetration of newly vascularized tissue,thus impeding grafting of split-thickness autologous skin grafts on the dermal substitute base.

关键词： Dermal substitutes in vivo models wound dressings soyabean-based biomaterials

Detecting lithium plating dynamics in a solid-state battery with operando X-ray computed tomography using machine learning

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npj Computational Materials 2023年第1期9卷 1402-1410页

作者： Ying Huang David Perlmutter Andrea Fei-Huei Su Jerome Quenum Pavel shevchenko Dilworth Y.Parkinson iryna v.Zenyuk Daniela Ushizima Department of Materials Science&Engineering University of California IrvineIrvineCaliforniaUSA National Fuel Cell Research Center University of California IrvineIrvineCaliforniaUSA Applied Math and Computational Research Division Lawrence Berkeley National LaboratoryBerkeleyCaliforniaUSA Department of Chemical&Biomolecular Engineering University of California IrvineIrvineCaliforniaUSA Department of Electrical Engineering and Computer Sciences College of EngineeringUniversity of California BerkeleyBerkeleyCaliforniaUSA Advanced Photon Source Argonne National Laboratory9700 South Cass AvenueLemontIllinoisUSA Advanced Light Source Lawrence Berkeley National LaboratoryBerkeleyCaliforniaUSA Berkeley institute for Data Science University of California BerkeleyBerkeleyCaliforniaUSA

Operando X-ray micro-computed tomography(µCT)provides an opportunity to observe the evolution of Li structures inside pouch *** is an essential step to quantitatively analyzingµCT datasets but is challenging to achi.v. on operando Li-metal battery datasets due to the low X-ray attenuation of the Li metal and the sheer size of the ***,we report a computational approach,batteryNET,to train an iterative Residual U-Net-based network to detect Li *** resulting semantic segmentation shows singular Li-related component changes,addressing diverse morphologies in the *** addition,visualizations of the dead Li are provided,including calculations about the volume and effective thickness of electrodes,deposited Li,and redeposited *** also report discoveries about the spatial relationships between these *** approach focuses on a method for analyzing battery performance,which brings insight that significantly benefits future Li-metal battery design and a semantic segmentation transferrable to other datasets.

关键词： battery lithium state

Rare primary mature teratoma of the liver:A case report

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World Journal of Hepatology 2021年第12期13卷 2192-2200页

作者： Yury A Kovalenko Yury O Zharikov Yana v Kiseleva Anton B Goncharov Tatyana v shevchenko Beslan N Gurmikov Dmitry v Kalinin Alexey v Zhao Department of Surgical Oncology and Chemotherapy A.V.Vishnevsky National Medical Research Center of Surgery of the Russian Ministry of HealthcareMoscow 115093Russia Department of Human Anatomy Sechenov First Moscow State Medical University(Sechenov University)Moscow 119048Russia international School“Medicine of the Future” Sechenov First Moscow State Medical University(Sechenov University)Moscow 119048Russia Pathology Department A.V.Vishnevsky National Medical Research Center of Surgery of the Russian Ministry of HealthcareMoscow 115093Russia

BACKGROUND Primary liver teratoma is an extremely rare tumor usually affecting children under the age of 3 *** signs of teratoma on ultrasound,computed tomography(CT)or magnetic resonance imaging are lacking,which makes morphology the only diagnostic *** of a mature teratoma may lead to excessive liver resection,whereas misdiagnosis of an immature teratoma may result in spread,causing a life-threatening ***,a careful tumor examination is important,and the rarest types of tumors must be accounted *** SUMMARY We describe a 52 years old female who presented with a solid mass in the left liver ***-enhanced CT and magnetic resonance imaging(MRi)revealed a round,heterogeneous lesion containing a number of fluid areas and areas of calcification in the middle,and the provisional diagnosis was *** patient underwent resection of liver segment *** analysis of the resected lesion indicated thyroid follicular epithelium;however,the thyroid gland was intact.10 years prior to presentation the patient underwent a surgery due to mature teratoma of the right ovary,nevertheless the tumor was benign and could not spread to the liver,in addition teratoma of the liver was also *** led to the final diagnosis of primary mature liver *** Primary hepatic teratoma,including heterotopia of the thyroid gland in the liver,is an extremely rare condition in adults that needs to be considered in the differential diagnosis of solid-cystic neoplasms in the liver and *** case adds to the limited literature on the patient presentation,clinical workup and management of liver teratomas.

关键词： Case report Primary liver teratoma Ectopic thyroid gland tissue Mature teratoma Epidermoi cyst

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窄禁带半导体的自由载流子吸收

红外与毫米波学报 1991年第4期10卷 241-245页

作者： A.E.BELYAEv N.v.shevchenko Z.A.DEMiDENKO institute of Semiconductors Academy of Sciences of the Ukrainian SSRInstitute of Semiconductors Academy of Sciences of the Ukrainian SSRInstitute of Physics Academy of Sciences of the Ukranian SSR Prospect Nauki 45 Kiev-28 252650 USSRProspect Nauki 45 Kiev-28 252650 USSRProspect Nauki 46 Kiev-28 252028 USSR

从理论和实验上研究了77K和300K温度下,本征型半导体inSb,Hg_(1-x)Cd_xTe,Hg_(1-x)Mn_xTe和高掺杂Hg_(1-x)Cd_xTe在2.5～50μm波段范围内的自由载流子吸收,结果表明:对于所研究的三种本征型样品,均是极性光学声子散射起主要作用,对于inS... 详细信息

从理论和实验上研究了77K和300K温度下,本征型半导体inSb,Hg_(1-x)Cd_xTe,Hg_(1-x)Mn_xTe和高掺杂Hg_(1-x)Cd_xTe在2.5～50μm波段范围内的自由载流子吸收,结果表明:对于所研究的三种本征型样品,均是极性光学声子散射起主要作用,对于inSb还应考虑声学声子和电离杂质散射。对有缺陷的Hg_(1-x)Mn_xTe样品,理论计算的自由载流子吸收系数与实验值不一致,表明存在附加的散射机制,对高掺杂Hg_(1-x)Cd_xTe的研究证实了这一假设。还讨论了非弹性电子-声子散射机制的起因,估算了特性参数。

关键词：窄禁带半导体自由载流子

Production of super-heavy nuclei in cold fusion reactions

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Chinese Physics C 2021年第4期45卷 301-324页

作者： v.Yu.Denisov i.Yu.Sedykh institute for Nuclear Rescarch Prospect Nauki 4703028 KievUkraine Faculty of Physics Taras Shevchenko National University of KievProspect Glushkova 203022 KievUkraine Financial University under the Goverment of the Russian Federation Leningradsky Prospekt 49125993 MoscowRussian Federation

A model for cold-fusion reactions related to the synthesis of super-heavy nuclei in collisions of heavy projectile-nuclei with a ^(208)Pb target nucleus is *** the framework of this model,the production of the com-pound nucleus by two paths,the di-nuclear system path and the fusion path,are taken into account *** formation of the compound nucleus in the framework of the di-nuclear system is related to the transfer of nucle-ons from the light nucleus to the heavy *** fusion path is linked to the sequential evolution of the nuclear shape from the system of contacting nuclei to the compound *** is shown that the compound nucleus is mainly formed by the fusion path in cold-fusion *** landscape of the potential energy related to the fusion path is discussed in *** landscape for very heavy nucleus-nucleus systems has an intermediate state,which is linked to the formation of both the compound nucleus and the quasi-fission *** decay of the intermediate state is taken into account in the calculation of the compound nucleus production cross sections and the quasi-fission cross *** values of the cold-fusion cross sections obtained in the model agree well with the experimental data.

关键词： super-heavy nuclei production statistical compound-nucleus reactions low energy heavy-ion reactions fusion and fusion-fission reactions

Ferrofluid nucleus phase transitions in an external uniform magnetic field

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Chinese Physics B 2015年第10期24卷 322-330页

作者： B.M.Tanygin S.i.Shulyma v.F.Kovalenko M.v.Petrychuk Faculty of Radiophysics Taras Shevchenko National University of Kyiv

The phase transition between a massive dense phase and a diluted superparamagnetic phase has been studied by means of a direct molecular dynamics simulation. The equilibrium structures of the ferrofluid aggregate nucleus are obtained for different values of a temperature and an external magnetic field magnitude. An approximate match of experiment and simulation has been shown for the ferrofluid phase diagram coordinates ＂field-temperature＂. The provided phase coexistence curve has an opposite trend comparing to some of known theoretical results. This contradiction has been discussed. For given experimental parameters, it has been concluded that the present results describe more precisely the transition from linear chains to a dense globes phase. The theoretical concepts which provide the opposite binodal curve dependency trend match other experimental conditions： a diluted ferrofluid, a high particle coating rate, a high temperature,and/or a less particles coupling constant value.

关键词： ferrofluid aggregate phase diagram molecular dynamics

A simple description of the temperature dependence of the width of the fission-fragment mass yield in ^(197)Au and ^(209)Bi at intermediate energies

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Chinese Physics C 2019年第1期43卷 91-95页

作者： v.Yu.Denisov O.A.Belyanovska v.P.Khomenkov i.Yu.Sedykh K.M.Sukhyy institute for Nuclear Research Ukrainian State University of Chemical Technology Faculty of Physics Taras Shevchenko National University of Kiev National Technical University of Ukraine "igor Sikorsky Kyiv Polytechnic institute" Financial University

A simple approach is proposed to describe the experimental data for the widths of the fission-fragment mass yields in^(197)Au and^(209)Bi at low and intermediate *** approach is based on the expressions for the temperature dependence of the width of the fission-fragment mass yield and the mass of the most probable *** expression for the width of the fission-fragment mass yield depends on the mass of the most probable fragment,the surface terms of the energy level density parameter,the temperature and the stiffness parameter of the potential related to mass-asymmetric degree of *** is shown that the contribution of the surface term of the energy level density parameter is important for describing the experimental data in a wide range of energies.

关键词： fission-fragment mass yield width of fission-fragment mass yield temperature dependence fission

Temporal Periods and Duration of Formation of Cu-Mo Porphyry Deposits(Siberia and Mongolia)

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Global Geology 1999年第2期4卷 187-191页

作者： Sotnikov v.i., Ponomarchuk v.A., Berzina A.N., Berzina A.P., Kiseleva v.Yu. and shevchenko D.O. (United institute of Geology, Geophysics and Mineralogy, Novosibirsk, 630090, Russia)

Copper-molybdenum porphyry deposits of Russia (Sib eria) and Mongolia were formed within the interaction zone of the Siberian conti nent with Paleo-As ian (Pt 2-Pz 2), Paleo-Tethys (Pz 3) and Mongolo-Okhotsk (Pz 2-Mz) ocean s. Ore-beari ng magmatic (porphyry) complexes, which are closely associated in time and space with Cu-Mo mineralization, are represented by small stocks (up to 1 km 2) and numerous dikes of basic to acid composition. Rb-Sr and 40 Ar/ 39 Ar dating fix three temporal periods of activity o f ore-form ing process within Siberia and Mongolia which resulted in a wide appearance of C u-Mo porphyry mineralization. A series of large-scale deposits was formed at t ha t time: 1) Early Devonian (Mo-porphyry Sora deposit, Kuznetsk-Alatau; Cu-Mo- porp hyry Aksug deposit, Tuva), 2) Triassic (Cu-Mo-porphyry Erdenetuin-Obo, Northe rn Mongolia), 3) Late Jurassic (Cu-Mo-porphyry Zhireken and Shakhtama deposits, Eastern Transbaikalia). The deposits of small size were formed between these periods (Cu-Mo-porphyry Tsagan-Suburga, Cu-porphyry Kharmagtai deposits in Southern Mongolia, etc.). C u- Mo-porphyry deposits within Siberia and Mongolia as a whole were formed with a regular periodicity at 20～30 Ma intervals. Large copper-molybdenum porphyry deposits are characterized by the manifestat ion of multiple ore-forming processes which are related to separate pulses of o r e-bearing magmatism. Three pulses of ore-bearing magmatism are established at th e large scale Erdenetuin-Obo deposit: i-250～240 Ma, ii-225～220 Ma, iii-225 ～195 M a. Every magmatic pulse is accompanied by ore mineralization. The Erdenet ore di strict includes three deposits of different sizes. Large-scale deposits are in principle multi-stage formations. They are charac terized by the repeated manifestation of ore-bearing magmatism and the ore-for mi ng processes during the long period of geological time within a relatively limit ed space.

关键词： Cu-Mo-porphyry deposits temporal periods sources of matter large -scale deposits

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一种原子气室制备碱金属充制工艺设备的研制

真空科学与技术学报 2020年第11期40卷 1050-1053页

作者：王华栋高炳天刘立美冯浩 Gao Xingmin shevchenko.O.v. 兰州工业学院兰州730050 兰州空间技术物理研究所兰州730000 兰州工业学院航空航天配套装备应用技术研究所兰州730050 乌克兰国立技术大学基辅03056

原子气室是新型量子仪表如量子频标和量子传感器等的核心部件,在其制备过程中,碱金属真空充制设备和充制质量控制是工艺和技术难点之一。运用麦克斯韦速率分布规律和Langmuir物质蒸发与凝结理论,研制了一种原子气室制备过程中碱金属充... 详细信息

原子气室是新型量子仪表如量子频标和量子传感器等的核心部件,在其制备过程中,碱金属真空充制设备和充制质量控制是工艺和技术难点之一。运用麦克斯韦速率分布规律和Langmuir物质蒸发与凝结理论,研制了一种原子气室制备过程中碱金属充制的自动化控制工艺设备。实现了碱金属充制过程量化控制。经铷泡充制实验验证,充铷量在500±100μg以内的铷泡占已所充铷泡的比率由35%提高至73%;离散度由±550减小至±250μg。该技术和设备可用于原子气室批量制备,具有广泛的应用推广价值。

关键词：原子气室碱金属真空充制工艺设备