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Clinical features of syphilitic myelitis with longitudinally extensive myelopathy on spinal magnetic resonance imaging

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World Journal of Clinical Cases 2019年第11期7卷 1282-1290页

作者： Jun-Liang Yuan wei-xue Wang Wen-Li Hu Department of Neurology Beijing Chaoyang Hospital Capital Medical University Beijing 100020 China Department of Oncology Beijing Chaoyang Hospital Capital Medical University Beijing 100020 China

BACKGROUND Syphilitic myelitis caused by Treponema pallidum is an extremely rare disease. However, symptomatic neurosyphilis, especially syphilitic myelitis, and its clinical features have been infrequently reported. Only a few cases of syphilitic myelitis have been documented. To the best of our knowledge, there are only 19 reported cases of syphilitic myelitis. However, the clinical features of syphilitic myelitis with longitudinally extensive myelopathy have been still not clear. AIM To explore the clinical features of syphilitic myelitis with longitudinally extensive myelopathy on spinal magnetic resonance imaging (MRI). METHODS First, we report a patient who suffered from syphilitic myelitis with symptoms of sensory disturbance, with longitudinally extensive myelopathy with "flip-flop sign" on spinal MRI. Second, we performed a literature search to identify other reports (reviews, case reports, or case series) from January 1987 to December 2018, using the PubMed and Web of Science databases with the terms including "syphilis","neurosyphilis","syphilitic myelitis","meningomyelitis","central nervous system", and "spine". We also summarized the clinical features of syphilitic myelitis with longitudinally extensive myelopathy. RESULTS A total of 16 articles of 20 cases were identified. Sixteen patients presented with the onset of sensory disturbance (80%), 15 with paraparesis (75%), and 9 with urinary retention (45%). Eleven patients had a high risk behavior (55%). Five patients had concomitant human immunodeficiency virus infection (25%).Serological data showed that 15 patients had positive venereal disease research laboratory test (VDRL)/treponema pallidum particle agglutination (TPHA), and 17 had positive VDRL/TPHA in cerebrospinal fluid (CSF). Seventeen patients were found to have elevated leukocytosis and protein in CSF. On MRI, 16 patients showed abnormal hyperintensities involved the thoracic spine, 6 involved the cervical spine, and 3 involved both the cerv

关键词： Neurosyphilis Syphilitic myelitis Syphilitic meningomyelitis Human immunodeficiency virus

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Effects of SiO_2 and TiO_2 on resistance stabilities of flexible indium-tin-oxide films prepared by ion assisted deposition

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Rare Metals 2009年第6期28卷 559-563页

作者： LI Yuqiong YU Zhinong WANG Wuyu FAN Yuejiang DING Zhao xue wei School of Optoelectronics Beijing Institute ofTectmology Beijing 100081 China General Research Institute for Nonferrous Metals Beijing 100088 China

Inorganic buffer layers such as SiO2 or TiO2 and transparent conductive indium-tin-oxide （ITO） films were prepared on polyethylene terephthalate （PET） substrates by ion assisted deposition （IAD） at room temperature, and the effects of SiO2 and TiOzon the bending resistance performance of flexible ITO films were investigated. The results show that ITO films with SiO2 or TiO2 buffer layer have better resistance stabilities compared to ones without the buffer layer when the ITO films are inwards bent at a bending radius more than 1.2 cm and when the ITO films are outwards bent at a bending radius from 0.8 cm to 1.2 cm. 1TO films with SiO2 buffer layer have better resistance sta- bilities compared to ones with TiO2 buffer layer after the ITO fdms are bent several hundreds of cycles at the same bending radius, for the adhesion of SiO2 is stronger than that of TiO2. The compressive stress resulted from inward bending leads to the formation of more defects in the ITO films compared with the tensile stress arising from outward bending. SiO2 and TiO2 buffer layers can effectively improve the crystallinity of ITO films in （400）, （440） directions.

关键词： indium-tin-oxide (ITO) inorganic buffer layers bending resistance performance stress ion assisted deposition (IAD)

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Identification of Molecular Markers for a Aphid Resistance Gene in Sorghum and Selective Efficiency Using These Markers

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Journal of Integrative Agriculture 2012年第7期11卷 1086-1092页

作者： CHANG Jin-hua CUI Jiang-hui xue wei ZHANG Qing-wen College of Agriculture and Biotechnology China Agricultural University Beijing 100096 P.R.China College of Agriculture Agricultural University ofHebei Baoding 071001 P.R.China Student Employment Guidance Center Baoding Vocational and Technical College Baoding 071001 P.R.China

In this study, an F2 segregated population obtained by hybridization between the aphid-sensitive sorghum strain Qiansan and aphid-resistant cultivar Henong 16 was used to establish an aphid-resistant pool and an aphid-sensitive pool. 192 pairs of AFLP （amplified fragment length polymorphism） marker primers were screened in these pools using BSA （bulked segregant analysis）. Three pairs of EcoR I-CTG/Mse I-CCT, EcoR I-CTG/Mse I-CAT, and EcoR I-AGT/Mse I-CCC showed linkage with aphis resistance. EcoR I-CTG/Mse I-CCT-475, EcoR I-CTG/Mse I-CAT-390, and EcoR I-AGT/Mse I-CCC- 350 （E42/M52-350） were mapped within 6, 10, and 13 cM distances with the aphid-resistant gene by using Mapmaker 3.0 software. The bands amplified by EcoR I-CTG/Mse I-CCT-475 and EcoR I-CTG/Mse I-CAT-390 were extracted, cloned, and sequenced. Specific primers of SCAR （sequence characterized amplified regions） were then designed from these bands. A specific band of 300 bp was amplified by a pair of SCAR primers designed based on the sequence obtained from the EcoR I-CTG/Mse I-CAT-390 marker. The SCAR marker was named SCAS0. The marker was used to detect the F2, BC1, and F2：3 populations. The selective efficiency was 86.8, 91.1, and 86.3% in the BC1, F2, and F2：3 populations, respectively. The average selective efficiency was 88.2%.

关键词： sorghum bicolor aphid resistance gene molecular marker SCAR molecular assistant selection

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Water-induced MAPbBr_(3)@PbBr(OH) with enhanced luminescence and stability

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Light(Science & Applications) 2020年第1期9卷 1598-1608页

作者： Kai-Kai Liu Qian Liu Dong-Wen Yang Ya-Chuan Liang Lai-Zhi Sui Jian-Yong wei Guo-wei xue Wen-Bo Zhao xue-Ying Wu Lin Dong Chong-Xin Shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material PhysicsMinistry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of Sciences457 Zhongshan RoadDalian 116023China

Poor stability has long been one of the key issues that hinder the practical applications of lead-based halide *** this paper,the photoluminescence(PL)quantum yield(QY)of bromide-based perovskites can be increased from 2.5% to 71.54% by introducing water,and the PL QY of a sample in aqueous solution decreases minimally over 1 *** enhanced stability and PL QY can be attributed to the water-induced methylamino lead bromide perovskite(MAPbBr_(3))@PbBr(OH).We note that this strategy is universal to MAPbBr_(3),formamidine lead bromide perovskite(FAPbBr_(3)),inorganic lead bromide perovskite(CsPbBr_(3)),***-emitting devices(LEDs)are fabricated by using the as-prepared perovskite as phosphors on a 365 nm UV *** luminance intensity of the LED is 9549 cd/m^(2) when the driven current is 200 mA,and blemishes on the surface of glass are clearly observed under the illumination of the *** work provides a new strategy for highly stable and efficient perovskites.

关键词： perovskite stability luminescence

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Lessons Learned from Optimizing the Sunway Storage System for Higher Application I/O Performance

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Journal of Computer Science & Technology 2020年第1期35卷 47-60页

作者： Qi Chen Kang Chen Zuo-Ning Chen Fellow CCF wei xue Xu Ji Bin Yang Department of Computer Science and Technology Beijing National Research Center for Information Science and Technology(BNRist)Tsinghua UniversityBeijing 100084China Chinese Academy of Engineering Beijing 100088China National Supercomputing Center in Wuxi Wuxi 214100China School of Software Shandong UniversityJinan 250101China

It is hard for applications to make full utilization of the peak bandwidth of the storage system in highperformance computers because of I/O interferences,storage resource misallocations and complex long I/O *** performed several studies to bridge this gap in the Sunway storage system,which serves the supercomputer Sunway *** locate these issues and connections between them,an end-to-end performance monitoring and diagnosis tool was developed to understand I/O behaviors of applications and the *** the help of the tool,we were about to find out the root causes of such performance barriers at the I/O forwarding layer and the parallel file system *** application-aware I/O forwarding allocation framework was used to address the I/O interferences and resource misallocations at the I/O forwarding layer.A performance-aware data placement mechanism was proposed to mitigate the impact of I/O interferences and performance variations of storage devices in the ***,applications obtained much better I/O *** the process,we also proposed a lightweight storage stack to shorten the I/O path of applications with N-N I/O *** paper summarizes these studies and presents the lessons learned from the process.

关键词： high performance computing I/O interference parallel file system performance optimization resource misallocation

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N,N,O-Tridentate One-dimensional Methyl-bridged Heterobimetallic Complex: Synthesis, Crystal Structure and Catalytic Activity

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Chinese Journal of Structural Chemistry 2020年第7期39卷 1343-1349页

作者： HUA Yu-Peng PANG Jing-Lin GAO Yan-Peng wei xue-Hong Ordos Institute of Technology Ordos 017000Inner MongoliaChina Scientific Instrument Center Shanxi UniversityTaiyuan 030006China

The sequential reaction of the N,N,O-tridentate ligand HOC(CH2)5CH2N(Me)CH2CH2NMe2(LH)in diethyl ether with AlEtCl2 and MeLi afforded a lithium-aluminum complex containing a polymeric structure of one-dimensional chain[{-LiOC(CH2)5CH2N(Me)CH2CH2NMe2}AlMe2CH3-}n](1),which was characterized by 1H,13C NMR spectra,elemental analyses and single-crystal X-ray diffraction *** 1 crystallizes in triclinic,space group P1 with a=10.526(3),b=10.949(3),c=17.799(4)?,β=76.211(11)°,V=1915.3(8)?3,Dc=1.014 g·cm–3,F(000)=648 andμ=0.104 mm–*** addition,the heterobimetallic complex 1 was used to catalyze the Meerwein-Ponndorf-Verley(MPV)reaction and exhibited excellent catalytic activities in good yield(up to 97%).

关键词： heterobimetallic complex synthesis characterization catalytic reaction

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Solid-state reaction of a CaO−V_(2)O_(5)mixture:A fundamental study for the vanadium extraction process

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International Journal of Minerals,Metallurgy and Materials 2021年第9期28卷 1462-1468页

作者： Jun-yi Xiang Xin Wang Gui-shang Pei Qing-yun Huang xue-wei Lv College of Materials Science and Engineering Chongqing UniversityChongqing 400044China School of Metallurgy and Materials Engineering Chongqing University of Science and TechnologyChongqing 401331China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and Advanced Materials Chongqing UniversityChongqing 400044China

The aim of this study was to investigate the phase transformation and kinetics of the solid-state reaction of CaO−V_(2)O_(5),which is the predominant binary mixture involved in the vanadium recovery *** analysis,X-ray diffraction spectroscopy,scanning electron microscopy,and energy dispersive spectrometry were used to characterize the solid-state reaction of the *** extent of the solid reac-tion was derived using the preliminary quantitative phase analysis of the X-ray *** results indicate that the solid reaction of the CaO−V_(2)O_(5)mixture is strongly influenced by the reaction temperature and CaO/V_(2)O_(5)mole *** transformation of calcium vanadate in-volves a step-by-step reaction of CaO−V_(2)O_(5),CaO−CaV_(2)O_(6),and CaO−Ca_(2)V_(2)O7 depending on the CaO/V_(2)O_(5)mole *** kinetic data of the solid reaction of the CaO−V_(2)O_(5)(1:1)mixture followed a second-order reaction *** activation energy(Ea)and preexponential factor(A)were determined to be 145.38 kJ/mol,and 3.67×10^(8)min^(−1),respectively.

关键词： calcium vanadate vanadium extraction solid-state reaction kinetics

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Electrocatalytic Multicomponent Cascade Cross-Coupling for the Synthesis of Chalcogenosulfonates

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Chinese Journal of Chemistry 2024年第17期42卷 2049-2055页

作者： Zhiheng Zhao Hongyan Yan Yaqin Zhou wei xue Lijun Gu Shengyong Zhang State Key Laboratoryof Green Pesticide Key Laboratoryof Green Pesticide and Agricultural BioengineeringMinistry of EducationCenter for R&D of Fine Chemicals of Guizhou UniversityGuiyangGuizhou 550025China Schoolof Pharmacy Air Force Medical UniversityShaanxiXi'anShaanxi 710032China

An electrocatalytic multicomponent cascade cross-coupling for the synthesis of chalcogenosulfonates has been *** approach does not require the use of transition metals,acids,and external *** gentle conditions and tole... 详细信息

关键词： Electrochemical catalysis Synthetic methods Radical Multi-component reaction Chalcogenosulfonates Tellurium

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Elman neural network for predicting aero optical imaging deviation based on improved slime mould algorithm

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Optoelectronics Letters 2023年第5期19卷 290-295页

作者： XU Liang WANG Luyang xue wei ZHAO Shiwei ZHOU Liye Tianjin Key Laboratory of Complex Control Theory and Application School of Electronic Engineering and AutomationTianjin University of TechnologyTianjin 300384China China Academy of Aerospace Science and Innovation Beijing 100048China

This research suggests a methodology to optimize Elman neural network based on improved slime mould algorithm(ISMA) to anticipate the aero optical imaging *** improved Tent chaotic sequence is added to the SMA to initialize the population to accelerate the algorithm’s speed of ***,an improved random opposition-based learning was added to further enhance the algorithm’s performance in addressing problems that the SMA has such as weak convergence ability in the late iteration and an easy tendency to fall into local optimization in the optimization process when solving the optimization ***,the algorithm model is compared to the Elman neural network and the SMA optimization Elman neural network *** three models are assessed using four evaluation indicators,and the findings demonstrate that the ISMA optimization model can anticipate the aero optical imaging deviation in an accurate way.

关键词： neural Elman network

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Enhanced stability of nitrogen-doped carbon-supported palladium catalyst for oxidative carbonylation of phenol

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Chinese Journal of Chemical Engineering 2024年第1期65卷 19-28页

作者： Xiaojing Liu Ruohan Zhao Hao Zhao Zhimiao Wang Fang Li wei xue Yanji Wang Hebei Provincial Key Laboratory of Green Chemical Technology and High Efficient Energy Saving School of Chemical Engineering and TechnologyHebei University of TechnologyTianjin 300130China Tianjin Key Laboratory of Chemical Process Safety Tianjin 300130China Hebei Industrial Technology Research Institute of Green Chemical Industry Huanghua 061100China

Enhancing the stability of supported noble metal catalysts emerges is a major challenge in both science and ***,a heterogeneous Pd catalyst(Pd/NCF)was prepared by supporting Pd ultrafine metal nanoparticles(NPs)on nitrogen-doped carbon;synthesized by using F127 as a stabilizer,as well as chitosan as a carbon and nitrogen *** Pd/NCF catalyst was efficient and recyclable for oxidative carbonylation of phenol to diphenyl carbonate,exhibiting higher stability than Pd/NC prepared without F127 *** hydrogen bond between chitosan(CTS)and F127 was enhanced by F127,which anchored the N in the free amino group,increasing the N content of the carbon material and ensuring that the support could provide sufficient N sites for the deposition of Pd *** process helped to improve metal *** increased metal-support interaction,which limits the leaching and coarsening of Pd NPs,improves the stability of the Pd/NCF ***,density functional theory calculations indicated that pyridine N stabilized the Pd^(2+)species,significantly inhibiting the loss of Pd^(2+)in Pd/NCF during the reaction *** work provides a promising avenue towards enhancing the stability of nitrogen-doped carbon-supported metal catalysts.

关键词： Supported Pd catalyst N-doped carbon Amphiphilic triblock copolymer Pyridinic nitrogen Stability

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