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Full-endoscopic spine surgery treatment of lumbar foraminal stenosis after osteoporotic vertebral compression fractures:A case report

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World Journal of Clinical Cases 2022年第2期10卷 656-662页

作者： Quan-Lai Zhao Kun-Peng Hou Zhong-xuan Wu Liang Xiao hong-guang xu Department of Spine Surgery Wannan Medical CollegeWuhu 241001Anhui ProvinceChina

BACKGROUND Few reports have described lumbar foraminal stenosis-induced radiculopathy after treatment by full-endoscopic spine surgery(FESS)combined with percutaneous vertebroplasty(PVP)in patients with vertebral compression *** herein report such a case,including the patient’s treatment process and doctor’s surgical *** SUMMARY A 79-year-old man presented with symptoms of radiculopathy after sustaining L4 vertebral compression *** and physical examination revealed L4 vertebral compression fractures combined with L3/4 Lumbar foraminal stenosis(LFS).The patient’s symptoms were low back pain with pain in the lateral left *** many reports have described radiculopathy induced by osteoporotic vertebral compression fractures,the use of FESS combined with PVP has rarely been *** case report indicates that the combination of FESS and PVP is a safe and effective approach for the treatment of LFS-induced radiculopathy after vertebral compression *** minimally invasive technique has great potential to replace traditional lumbar fixation and decompression ***,we suggest the continued accumulation of similar cases to discuss the wider application of *** For patients with osteoporotic vertebral compression fracture(OVCF)and LFS,PVP and FESS can be used to restore the vertebral height and reduce the pressure around the intervertebral ***,the combination of FESS and PVP can treat the pain or numbness of the low back and lower limbs and allow for recovery in a short time with excellent postoperative *** general,FESS is a good treatment for radiculopathy caused by foraminal stenosis after OVCF.

关键词： Osteoporotic vertebral compression fracture Lumbar foraminal stenosis Percutaneous vertebroplasty Full-endoscopic spine surgery Radiculopathy Case report

Modification of Reflectron Time-of-Flight Mass Spectrometer for Photodissociation of Mass-Selected Cluster lons

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Chinese Journal of Chemical Physics 2009年第6期22卷 655-662,J0002页

作者： Yu-chao Zhao Zeng-guang Zhang Jin-yun Yuan hong-guang xu Wei-jun Zheng Beijing National Laboratory for Molecular Science State Key Laboratory of Molecular Reaction Dynamics Institute of Chemistry Chinese Academy of sciences Beijing 100190 China

We introduce a modification of reflectron time-of-flight mass spectrometer for laser photodissociation of mass-selected ions. In our apparatus, the ions of interests were selected by a mass gate near the first space focus point and decelerated right after the mass gate, were then crossed by a laser beam for dissociation. The daughter ions and surviving parent ions were re-accelerated and analyzed by the reflectron time-of-flight mass spectrometer. Compared to the designs reported by other research groups, our selection-deceleration-dissociation-reacceleration approach has better daughter-parent-ions-separation, easier laser timing, and better overlapping between the ion beam and laser beam. We also conducted detailed cal- culations on the parent ion and daughter ion flight times, and provided a simplified formula for the calibration of daughter ion mass.

关键词： Reflectron time-of-flight mass spectrometer Photodissociation Mass-selection Cluster

Structural Evolution and Electronic Properties of Au2Gen-/0（n=1-8） Clusters: Anion Photoelectron Spectroscopy and Theoretical Calculations

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Chinese Journal of Chemical Physics 2019年第2期32卷 229-240,I0003页

作者： Sheng-Jie Lu hong-guang xu Xi-Ling xu Wei-Jun Zheng Department of Chemistry and Chemical Engineering Heze University Heze 274015 China Beijing National Laboratory for Molecular Sciences State Key Laboratory of Molecular Reaction Dynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China Department of Chemistry COMSATS University Islamabad Abbottabad-Campus Pakistan University of Chinese Academy of Sciences Beijing 100049 China

Investigating the structures and properties of Au-Ge mixed clusters can give insight into the microscopic mechanisms in gold-catalyzed Ge films and can also provide valuable information for the production of germanium-based functional materials. In this work, size-selected anion photoelectron spectroscopy and theoretical calculations were used to explore the structural evolution and electronic properties of Au2Gen^-/0 (n=1-8) clusters. It is found that the two Au atoms in Au2Gen^-/0 (n=1-8) showed high coordination numbers and weak aurophilic interactions. The global minima of Au2Gen- anions and Au2Gen neutrals are in spin doublet and singlet states, respectively. Au2Gen- anions and Au2Gen neutrals showed similar structural features, except for Au2Ge4^-/0 and Au2Ge5^-/0. The C2v symmetric V-shaped structure is observed for Au2Ge1^-/0, while Au2Ge2^-/0 has a C2v symmetric dibridged structure. Au2Ge3^-/0 can be viewed as the two Au atoms attached to different Ge-Ge bonds of Ge3 triangle. Au2Ge4- has two Au atoms edge-capping Ge4 tetrahedron, while Au2Ge4 neutral adopts a C2v symmetric double Au atoms face-capping Ge4 rhombus. Au2Ge5-8^-/0 show triangular, tetragonal, and pentagonal prism-based geometries. Au2Ge6 adopts a C2v symmetric tetragonal prism structure and exhibits σ plus π double bonding characters.

关键词： Photoelectron spectroscopy Transition metal Germanium cluster Structural evolution Quantum chemical calculations

Anion Photoelectron Spectroscopy and Density Functional Theory Studies of AuC_(n)^(-/0)(n=3-8):Odd-Even Alternation in Electron Binding Energies and Structures

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Chinese Journal of Chemical Physics 2022年第1期35卷 177-184,I0035-I0040,I0064页

作者： Peng Wang Shuai-Ting Yan hong-guang xu Xi-Ling xu Wei-Jun Zheng Beijing National Laboratory for Molecular Sciences State Key Laboratory of Molecular Reaction DynamicsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

We measured the photoelectron spectra of AuC_(n)^(-)(n=3-8)and conducted theoretical study on the structures and properties of AuC_(n)^(-/0)(n=3-8).It is found that the photoelectron spectra of AuC_(n)^(-)exhibit odd-even *** spectral features of AuC_(3)^(-),AuC_(5)^(-),and AuC_(7)^(-)are much broader than those of AuC_(4)^(-),AuC_(6)^(-),and AuC_(5)^(-).The vertical detachment energies of AuC_(3)^(-),AuC_(5)^(-),and AuC_(7)^(-)are lower than those of AuC_(4)^(-),AuC_(6)^(-),and AuCs_(8)^(-).The most stable structures of AuC_(n)^(-)(n=3-8)are chain *** most stable structures of neutral AuC_(n)(n=3-8)are linear structures except that those of AuC_(3) and AuC_(5) are slightly *** calculated∠AuCC angles,Au-C bond lengths,and the charges on Au atom also show odd-even alternations,consistent with the experimental observations.

关键词： Gold carbides Photoelectron spectroscopy Density functional theory Odd-even alternation

A novel tissue engineered nerve graft constructed with autologous vein and nerve microtissue repairs a longsegment sciatic nerve defect

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Neural Regeneration Research 2021年第1期16卷 143-149页

作者： Jing Wang Ya-Qiong Zhu Yu Wang hong-guang xu Wen-Jing xu Yue-Xiang Wang Xiao-Qing Cheng Qi Quan Yong-Qiang Hu Chang-Feng Lu Yan-xu Zhao Wen Jiang Chen Liu Liang Xiao Wei Lu Chen Zhu Ai-Yuan Wang Spine Research Center of Wannan Medical College Key Laboratory of Non-coding RNA Transformation Research of Anhui Higher Education Institution(Wannan Medical College)Department of Spine SurgeryYijishan HospitalThe First Affiliated Hospital of Wannan Medical CollegeWuhuAnhui ProvinceChina Department of Ultrasound Chinese PLA General HospitalBeijingChina Department of Orthopedic Surgery Key Laboratory of Musculoskeletal Trauma&War Injuries PLABeijing Key Lab of Regenerative Medicine in OrthopedicsChinese PLA General HospitalBeijingChina Medical College of Nankai University TianjinChina The Neural Regeneration Co-Innovation Center of Jiangsu Province NantongJiangsu ProvinceChina Department of Anesthesiology the Second Affiliated Hospital of Inner Mongolia Medical UniversityHuhhotInner Mongolia Autonomous RegionChina Department of Orthopedic Surgery Yan’an University Affiliated HospitalYan’anShaanxi ProvinceChina Department of Orthopedic Surgery the First Affiliated Hospital of Medical CollegeShihezi UniversityShiheziXinjiang Uygur Autonomous RegionChina Department of Orthopedic Surgery The First Peoples’Hospital of Yunnan ProvinceKunmingYunnan ProvinceChina Department of Orthopedic Surgery Anhui Provincial HospitalThe First Affiliated Hospital of University of Science and Technology of ChinaHeifeiAnhui ProvinceChina

Veins are easy to obtain,have low immunogenicity,and induce a relatively weak inflammatory ***,veins have the potential to be used as conduits for nerve ***,because of the presence of venous valves and the great elasticity of the venous wall,the vein is not conducive to nerve *** this study,a novel tissue engineered nerve graft was constructed by combining normal dissected nerve microtissue with an autologous vein graft for repairing 10-mm peripheral nerve defects in *** with rats given the vein graft alone,rats given the tissue engineered nerve graft had an improved sciatic static index,and a higher amplitude and shorter latency of compound muscle action ***,rats implanted with the microtissue graft had a higher density and thickness of myelinated nerve fibers and reduced gastrocnemius muscle atrophy compared with rats implanted with the vein ***,the tissue engineered nerve graft had a lower ability to repair the defect than autogenous nerve *** summary,although the tissue engineered nerve graft constructed with autologous vein and nerve microtissue is not as effective as autologous nerve transplantation for repairing long-segment sciatic nerve defects,it may nonetheless have therapeutic potential for the clinical repair of long sciatic nerve *** study was approved by the Experimental Animal Ethics Committee of Chinese PLA General Hospital(approval No.2016-x9-07)on September 7,2016.

关键词： in vivo injury motor neurological function peripheral nerve injury rat recovery regeneration repair

Structural and Bonding Properties of Al_(n)C_(4)^(−/0)(n=2−4)Clusters:Anion Photoelectron Spectroscopy and Theoretical Calculations

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Chinese Journal of Chemical Physics 2021年第6期34卷 769-776,I0002,I0003,I0053-I0055页

作者： Chao-jiang Zhang Shuai-ting Yan hong-guang xu Xi-ling xu Wei-jun Zheng Beijing National Laboratory for Molecular Sciences(BNLMS) State Key Laboratory of Molecular Reaction DynamicsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

We measured the photoelectron spectra of Al_(n)C_(4)^(−)(n=2−4)clusters by using size-selected anion photoelectron *** structures of Al_(n)C_(4)^(−/0)(n=2−4)clusters were explored with quantum chemistry calculations and were determined by comparing the theoretical results with the experimental *** is found that the most stable structure of Al_(2)C_(4)^(−) anion is a C_(2v)symmetry planar structure with two Al atoms interacting with two C_(2)*** addition,Al_(2)C_(4)^(−) anion also has a D∞h symmetry linear structure with two Al atoms located at the two ends of a C_(4)chain,which is slightly higher in energy than the planar *** most stable structure of neutral Al_(2)C_(4)has a D∞h symmetry linear *** most stable structure of Al_(3)C_(4)^(−) anion is a planar structure with three Al atoms interacting with two C_(2)*** neutral Al_(3)C_(4)cluster has a C_(2v)symmetric V-shaped bent *** global minima structures of both Al_(4)C_(4)^(−) and neutral Al_(4)C_(4)are C_(2)h symmetry planar structures with four Al atoms interacting with the ends of two C_(2)*** natural density partitioning analyses of Al_(n)C_(4)^(−)(n=2−4)clusters show that the interactions between the Al atoms and C_(2)units have bothσandπcharacters.

关键词： Anion photoelectron spectroscopy Quantum chemistry calculations Planar aluminum-carbon structures

Photoelectron Spectroscopy and Density Functional Investigation of V2Si20- : An Endohedral Dodecahedron Structure

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Photoelectron Spectroscopy and Density Functional Investigat...

Photoelectron Spectroscopy and Density Functional Theory Calculations of Binary VnC30/-(n=1-6) Clusters

第十三届全国化学动力学会议

作者： hong-guang xu Xiangyu Kong Xiaojiao Deng Zeng-guang Zhang Weijun Zheng Beijing National Laboratory for Molecular Sciences State Key Laboratory of Molecular Reaction Dynamics Institute of Chemistry Chinese Academy of Sciences

Transition metal-doped caged silicon （M@Sin ） clusters have attracted great attention because of their novel structural features and potential technical applications. Anion photoelectron spectroscopy experiments were conducted to investigate the vanadium-doped silicon cluster, V2Si20- . Extensive DFT calculations were performed to identify low-lying isomers of V2Si20- cluster. The most stable structure of V2Si20 - is an elongated dodecahedron cage structure with a V2 encapsulated inside the silicon cage. The Si20 cage is composed of twelve pentagonal faces. The V-V distance in the dodecahedron V 2 @Si 20 is about 2.31 , which is longer than that of the V2 dimer （1.77 ） but shorter than that in metallic vanadium （2.62 ）. The calculated ADE and VDE of this structure are about 3.47 eV and 3.52 eV, in reasonable agreement with the experimental measurements （3.5 eV and 3.7 eV）. The constant electronic charge density of dodecahedron structure shows that Si atoms sp 3 hybridization leads to the formation of Si-Siσ bonds, and the electron density between two V atoms is higher. The strong bonding between two V atoms in dodecahedron V2Si20- cluster is consistent with those of small size V-Si clusters. We further investigated the geometric and electronic properties of one-dimensional nanowires assembled by a series of endohedral dodecahedron V2@Si20 , （V2@Si20 ） n （n=2-4）. It can be seen that the V2@Si20 units can be connected to form pearl-chain structures with two Si-Si bonds between each pair of neighboring V2@Si20 units. We also found that electrical conductivity of one-dimensional nanowires mainly takes place via s and p electrons. These make the endohedral dodecahedron V2@Si20 cluster a promising building block of self-assembly materials.

关键词： anion photoelectron spectroscopy DFT calculations dodecahedron charge density

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Chinese Journal of Chemical Physics 2022年第6期35卷 907-915,I0039-I0054,I0073页

作者： Jinyun Yuan Peng Wang Xiling xu Yonghui Zhang Linghao He hong-guang xu Gao-Lei Hou Wei-Jun Zheng School of Material and Chemical Engineering Zhengzhou University of Light IndustryZhengzhou 450002China Beijing National Laboratory for Molecular Sciences State Key Laboratory of Molecular Reaction DynamicsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Physical Science Laboratory Huairou National Comprehensive Science CenterBeijing 101400China MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi'an Jiaotong UniversityXi'an 710049China

Transition metal carbides have been shown to exhibit good catalytic performance that depends on their compositions and morphologies,and understanding such catalytic properties requires knowledge of their precise geometry,determination of which is challenging,particularly for clusters formed by multiple *** this study,we investigate the geometries and electronic structures of binary V_(n)C_(3)-(n=1-6)clusters and their neutrals using photoelectron spectroscopy and theoretical calculations based on density functional *** adiabatic detachment energies of V_(n)C_(3)-,or equally,the electron affinities of V_(n)C_(3),have been determined from the measured photoelectron *** calculations reveal that the carbon atoms become separate when the number of V atoms increases in the clusters,i.e.,the C-C interactions present in small clusters are replaced by V-C and/or V-V interactions in larger *** further explore the composition dependent formation of cubic or cube-like structures in 8-atom VnCm(n+m=8)clusters.

关键词： Vanadium carbide cluster Photoelectron spectroscopy Density functional theory Cubic or cube-like structure

Study of substituted aryldiazonium salts and their crown ethers complexes by XPS

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Acta Chimica Sinica(English Edition) 1985年第4期3卷 332-336页

作者： WANG Dang-Han LIU Shi-hong xu guang-Zhi Institute of Chemistry,Academia Sinica,Beijing SUN Xiang-Yu ZHAO Yao-Xing Graduate School,University of Science and Technology of China,Beijing Institute of Chemistry Academia Sinica Beijing Graduate School University of Science and Technology of China Beijing

The complexes of fourteen substituted aryldiazonium salts RC6H4N2+BF4-（R=H,p-CH3,p-NO2,p-I,p-Cl,p-F,m-Br,m-Cl,m-CH3,o-CH3,o-OCH3,o-NO2,o-Br,o-Cl）withcrown ethers 18-c-6（1）and dibenzo-24-c-8（2）have been studied by *** results show that thechemical shifts of a-N1s and β-N1s of substituted aryldiazonium salts are closely related to theinduction and conjugation effects of R *** is interesting to note that charge transfer（β-N→O）take place upon complexation of substituted aryldiazonium salts with crown *** thedecrease of binding energy of crown ether oxygen may be used as a measurement of the stabilitiesof these complexes.

关键词： Study of substituted aryldiazonium salts and their crown ethers complexes by XPS