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基体脉冲偏压对Tin/Cu纳米复合薄膜组织结构、力学及耐磨性能的影响（英文）

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稀有金属材料与工程 2018年第11期47卷 3284-3288页

作者：赵彦辉赵升升任玲 V.V.Denisov n.n.koval 杨柯于宝海中国科学院金属研究所辽宁沈阳110016 深圳职业技术学院机电工程学院广东深圳518055 俄罗斯科学院西伯利亚分院强流电子研究所俄罗斯托木斯克634055

采用轴向磁场增强电弧离子镀在高速钢基体上沉积了Ti n/Cu纳米复合薄膜,研究了基体脉冲偏压幅值对薄膜成分、结构、力学性能及耐磨性能的影响。结果表明,薄膜中铜含量随着脉冲偏压幅值的增加先增加而后降低,在一个较低的范围内(1.3 at%... 详细信息

采用轴向磁场增强电弧离子镀在高速钢基体上沉积了Ti n/Cu纳米复合薄膜,研究了基体脉冲偏压幅值对薄膜成分、结构、力学性能及耐磨性能的影响。结果表明,薄膜中铜含量随着脉冲偏压幅值的增加先增加而后降低,在一个较低的范围内(1.3 at%～2.1 at%)。X射线衍射结果表明所有的薄膜均出现Ti n相,并未观察到Cu相。薄膜的择优取向随着脉冲偏压幅值的增加而改变。薄膜的最高硬度为36 GPa,是在脉冲偏压幅值为-200 V时得到的,对应了1.6 at%的Cu含量。与纯的Ti n薄膜相比,Cu的添加明显增强了薄膜的耐磨性能。

关键词：电弧离子镀磁场:脉冲偏压显微结构力学性能

Pediatric GnAO1 encephalopathies:from molecular etiology of the disease to drug discovery

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neural Regeneration Research 2023年第10期18卷 2188-2189页

作者： Vladimir L.Katanaev Jana Valnohova Denis n.Silachev Yonika A.Larasati Alexey koval Translational Research Centre in Oncohaematology Department of Cell Physiology and MetabolismFaculty of MedicineUniversity of GenevaGenevaSwitzerland Institute of Life Sciences and Biomedicine Far Eastern Federal UniversityVladivostokRussia Department of Functional Biochemistry of Biopolymers A.N.Belozersky Research Institute of Physico-Chemical BiologyMoscow State UniversityMoscowRussia

Gao is the major G protein in neurons,where it transduces signals from numerous G proteincoupled receptors(GPCRs)such as D2 dopamine,μ-opioid,M2 muscarinic,or α2-adrenergic *** 2013,the first mutations in GnAO1,the gene encoding Gao,were described in pediatric patients with encephalopathies(nakamura et al.,2013),suffering from movementdisorders,epileptic seizures。

关键词： encephalo opioid

Laser polarization-variable autofluorescence of the network of optically anisotropic biological tissues:Diagnostics and differentiation of early stages of cancer of cervia uteri

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Journal of Innovative Optical Health Sciences 2014年第3期7卷 98-107页

作者： Yu.A.Ushenko M.I.Sidor n.Pashkovskaia G.D.koval Yu.F.Marchuk D.Andreichuk Correlation Optics Department Chernivtsi National University 2 Kotsyubinsky StreetChernivtsi 58012Ukraine Clinical Immanology Allergology and Endocrinology Dep artmentBucovinian State Medical University2 Theatral Sq.Chernivtsi 58002Ukraine

This research presents the results of investigation of laser_polarization fluorescence ofbiological layers(histological sections,cy tological smears)in the task of diagnostics and differ-en tiation of early stages of cancer:Dysplasia-cervical microinvasive carcinoma of cervic *** analytical conditions of polarization-optimal probing of biological layers were determinedbasing on the model of linear birefringence and dichroism of birefringent(fibrllar,porphyrin)*** technique of polarization-variable laser autofluorescence was developed andexperimentally *** objective criteria(statistical moments)of differentiation of histo-logical sections autofluorescent images of endometrium biopsy and cytological smears of itmucous coat were *** operational characteristics(sensitivity,speifity,accuracy)ofthis technique were determined concerning the positions of probative medicine,and clinical efficiency.

关键词： Autofluorescence polarization birefringence statistical optics diagnostics medical and autofluorescence imaging.

Change of oxide ceramics microhardness under action of high current pulsed beamof lowenergy electrons

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广东有色金属学报 2005年第2期15卷 129-131页

作者： Surzhikov A.P. Frangulyan T.S. Ghyngazov S.A. koval n.n. Devyatkov V.n. Tomsk Polytechnic University TomaskRussia Institute of High Current Electronics TomskRussia

The main point of the process of impact of a high-current pulsed beam for low-energy electrons (HPBLE) is that a kinetic energy of accelerated particles turns into a thermal energy.

关键词：陶瓷氧化物显微硬度电子机械性能

Enhanced piezoelectricity in na and Ce co-doped CaBi_(4)Ti_(4)O_(15) ceramics for high-temperature applications

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Journal of Advanced Ceramics 2023年第7期12卷 1331-1344页

作者： Zimeng Hu Vladimir koval Hangfeng Zhang Kan Chen Yajun Yue Dou Zhang Haixue Yan School of Engineering and Materials Science Queen Mary University of LondonLondon E14NSUK Institute of Materials Research Slovak Academy of SciencesKosice 04001Slovakia Spallation neutron Source Science Center Dongguan 523803China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

The sodium(na)and Ce co-doped calcium bismuth titanate(CBT;CaBi_(4)Ti_(4)O_(15))Aurivillius ceramics in a Ca_(1-x)(na_(0.5)Ce_(0.5)),Bi_(4)Ti_(4)O_(15)(CnCBT;doping content(x)=0,0.03,0.05,0.08 and 0.12)system were synthesized by the conventional solid-state sintering *** compositions show a single-phase orthorhombic(space group:A2jam)structure at room *** shift of the Curie point(T_(c))towards lower temperatures(T)on doping results from the increased tolerance factor(t).The substitution-enhanced ferroelectric performance with large maximum polarization(P_(m))and facilitated domain switching is evidenced by the developed electrical polarization-electric field(P-E)and electrical current-electric field(I-E)hysteresis *** piezoelectric coefficient(d_(33)=20.5±0.1 pC/n)of the x=0.12 sample is about four times larger than that of pure *** improved piezoelectric properties can be attributed to the high remanent polarization(P_(r))and relatively high dielectric permittivity(ε′).In addition,multi-sized(micron and sub-micron)domain structures were observed in the CnCBT ceramics by the piezoresponse force microscope(PFM).The multiple-sized ferroelectric domain structure with smaller domains is beneficial to the easy domain switching,enhanced ferroelectric performance,and improved piezoelectric properties of the CnCBT *** designed Aurivillius-phase ferroelectric ceramics with the T_(c) around 765℃and high piezoelectric coefficient(d_(33))are suitable for high-temperature piezoelectric applications.

关键词： Aurivillius-phase ceramics high Curie point domain switching,piezoelectric properties

Endoscopic endonasal transclival removal of tumors of the clivus and anterior region of the posterior cranial fossa (results of surgical treatment of 140 patients)

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Chinese neurosurgical Journal 2018年第4期4卷 219-232页

作者： Alexey n. Shkarubo Konstantin V. koval Ilia V. Chernov Dmitry n. Andreev Alexey B. Kurnosov Andrey A. Panteleyev Federal State Autonomous Institution N.N. Burdenko National Medical Research Center of Neurosurgery of the Ministry of Health of the Russian Federation (N.N. Burdenko NMRCN) 4-ya Tverskaya-YAmskaya street 16 Moscow Russian Federation

Background: Until recently, tumors of the clivus and the anterior region of the posterior cranial fossa were considered extremely difficult to access and often inoperable using standard transcranial approaches. With the introduction into the neurosurgical practice of minimally invasive methods utilizing endoscopic techniques, it became possible to effectively remove hard-to-reach tumors, including central tumors of the anterior region of the posterior cranial fossa. Methods: From 2008 to the present time, the inpatient institution has operated on 140 patients with various tumors of the base of the skull, localized to the clivus and anterior region of the posterior cranial fossa (65 men and 75 women). The age of patients ranged from 3 to 74 years. Tumor distribution according to the histopathological features was as follows: chordomas, 103 (73.57%);meningiomas, 12 (8.57%);pituitary adenomas, 9 (6.43%);fibrous dysplasia, 4 (2.86%);cholesteatoma, 3 (2.14%);craniopharyngiomas, 2 (1.43%);plasmacytomas, 2 (1.43%);and other tumors (giant cell tumor, neurohypophyseal glioma, osteoma, carcinoid, chondroma), 5 (3.57%). The tumors had the following size distribution: giant (more than 60 mm), 35 (25%);large (35–59 mm), 83 (59.3%);medium (21–35 mm), 21 (15%);and small (less than 20 mm), 1 (0.7%). In 11 cases, intraoperative monitoring of the cranial nerves was performed (21 cranial nerves were identified). Results: Upper, middle, and lower transclival approaches provide access to the anterior surface of the upper, middle, and lower neurovascular complexes of the posterior cranial fossa. The chordoma cases were distributed as follows according to extent of removal: total removal, 68 (66.02%);subtotal removal, 25 (24.27%);and partial removal, 10 (9.71%). The adenomas of the pituitary gland were removed totally in 6 cases, subtotally in 1 case and partially in 2 cases. The meningiomas were removed totally in 1 case, subtotally in 5 cases, and partially in 5 cases, with less than 50

关键词： Clivus Clival chordoma Endoscopic endonasal transclival approach Monitoring of cranial nerves Posterior cranial fossa Skull base anatomy Skull base surgery

Cranial nerve monitoring in endoscopic endonasal surgery of skull base tumors (observing of 23 cases)

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Chinese neurosurgical Journal 2019年第1期5卷 21-29页

作者： A.n.Shkarubo I.V.Chernov A.A.Ogurtsova V.E.Chernov O.V.Borisov K.V.koval D.n.Andreev Department of neurooncology Federal State Autonomous Institution"N.N.Burdenko National Medical Research Center of Neurosurgery"of the Ministry of Health of the Russian FederationMoscowRussia Department of neurophysiology Federal State Autonomous Institution"N.N.Burdenko National Medical Research Center of Neurosurgery"of the Ministry of Health of the Russian FederationMoscowRussia Department of neurosurgery N.N.Burdenko Main Military Clinical Hospital of the Ministry of Defense of the Russian FederationMoscowRussia Laboratory of Molecular Human Genetics Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological AgencyMoscowRussia

Background:Preservation of anatomic integrity and function of the cranial nerves during the removal of skull base tumors is one of the most challenging procedures in endoscopic endonasal *** is possible to use intraoperative mapping and identification of the cranial nerves in order to facilitate their *** purpose of this study was to evaluate the effectiveness of intraoperative trigger electromyography in prevention of iatrogenic damage to the cranial ***:Twenty three patients with various skull base tumors(chordomas,neuromas,pituitary adenomas,meningiomas,cholesteatomas)underwent mapping and identification of cranial nerves during tumor removal using the endoscopic endonasal approach in Department of neurooncology of Federal State Autonomous Institution"*** national Medical Research Center of neurosurgery"of the Ministry of Health of the Russian Federation from 2013 to *** the surgical interventions,mapping and identification of the cranial nerves were carried out using electromyography in triggered *** effectiveness of the method was evaluated based on a comparison with a control group(41 patients).Results:In the main group of patients,44 nerves were examined during surgery using triggered *** the study,the III,V,VI,VII,and XII cranial nerves were identified *** cranial nerve deficiency was observed in 5 patients in the study group and in 13 patients in the control *** average length of hospitalization was 9 ***:We did not receive statistically significant data supporting the fact that intraoperative identification of cranial nerves using trigger electromyography reduces the incidence of postoperative complications in the form of cranial nerve deficits(p=0.56),but the odds ratio(0.6)suggests a less frequent occurrence of complications in the study *** on our experience,the trigger electromyography methodology appears quite promising and req

关键词： Electromyography T-EMG Intraoperative cranial nerve identification Endoscopic endonasal approach Skull base tumor surgery

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Effects of Substrate Pulse Bias Duty Cycle on the Microstructure and Mechanical Properties of Ti–Cu–n Films Deposited by Magnetic Field-Enhanced Arc Ion Plating

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Acta Metallurgica Sinica(English Letters) 2017年第2期30卷 176-184页

作者： Sheng-Sheng Zhao Yan-Hui Zhao Lv-Sha Cheng Vladimir Viktorovich Denisov nikolay nikolaevich koval Bao-Hai Yu Hai-Juan Mei School of Mechanical and Electrical Engineering Shenzhen Polytechnic Institute of Metal Research Chinese Academy of Sciences Institute of High Current Electronics Siberian BranchRussian Academy of Sciences

Ti–Cu–n films were deposited on 316 L stainless steel substrates by magnetic field-enhanced arc ion *** effect of substrate pulse bias duty cycle on the chemical composition,microstructure,surface morphology,mechanical and tribological properties of the films was systemically *** results showed that,with increasing the duty cycle,Cu content decreases from 3.3 to 0.58 at.%.XRD results showed that only Ti n phase is observed for all the deposited films and the preferred orientation transformed from Ti n（200） to Ti n（111） plane with the increase in duty *** surface roughness and deposition rate showed monotonous decrease with increasing the duty *** residual stress and hardness firstly increase and then decrease afterwards with the increase in duty cycle,while the variation of critical load shows reverse *** for the film with duty cycle of 10%,others perform the better wear resistance.

关键词： Magnetic field Arc ion plating Ti-Cu-n film Residual stress Hardness

Volar locking distal radius plates show better short-term results than other treatment options: A prospective randomised controlled trial

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World Journal of Orthopedics 2016年第10期7卷 687-694页

作者： Herwig Drobetz Lidia koval Patrick Weninger Ruth Luscombe Paula Jeffries Stefan Ehrendorfer Clare Heal Orthopaedic Department Mackay Base Hospital James Cook University School of Medicine and Dentistry Orthopaedic Department the Prince Charles Hospital Orthopaedic Hospital Speising Mathematical Science School Queensland University of Technology Orthopaedic Department Kantons Hospital Uri Department of General Practice Mackay Base Hospital James Cook University School of Medicine and Dentistry Anton Breinl Research Centre for Health Systems Strengthening James Cook University

AIM To compare the outcomes of displaced distal radius fractures treated with volar locking plates and with immediate postoperative mobilisation with the outcomes of these fractures treated with modalities that necessitate 6 wk wrist *** A prospective, randomised controlled single-centre trial was conducted with 56 patients who had a displaced radius fracture were randomised to treatment either with a volar locking plate(n = 29), or another treatment modality(n = 27; cast immobilisation with or without wires or external fixator). Outcomes were measured at 12 wk. Functional outcome scores measured were the Patient-Rated Wrist Evaluation(PRWE) Score; Disabilities of the Arm, Shoulder and Hand and activities of daily living(ADLs). Clinical outcomes were wrist range of motion and grip strength. Radiographic parameters were volar inclination and ulnar *** Patients in the volar locking plate group had significantly better PRWE scores, ADL scores, grip strength and range of extension at three months compared with the control group. All radiological parameters were significantly better in the volar locking plate group at 3 mo. COnCLUSIOn The present study suggests that volar locking plates produced significantly better functional and clinical outcomes at 3 mo compared with other treatment modalities. Anatomical reduction was significantly more likely to be preserved in the plating group. Level of evidence: Ⅱ.

关键词： Volar locking distal radius plate Prospective randomised controlled Postoperative mobilisation Distal radius fracture Short-term outcome