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Simulating the Peculiar Periphery of the Cygnus Loop

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Research in Astronomy and Astrophysics 2024年第12期24卷 194-208页

作者： jun-yu shen Bi-Wen Bao Li Zhang Department of Astronomy Key Laboratory of Astroparticle Physics of Yunnan Province Yunnan University Key Laboratory of Statistical Modeling and Data Analysis of yunnan Province Yunnan University

The middle-aged Galactic supernova remnant （SNR）-the Cygnus Loop （CL）-displays a peculiar morphology in X-rays,featuring a blowout in the southern *** underlying process accounting for the formation of the peculiar periphery remains a *** this end,we conduct hydrodynamical simulations to investigate the SNR evolution coupled with a tailored stellar-wind model:a bipolar stellar wind emanating from a runaway red supergiant progenitor,excavating a wind-blown cavity elongated along *** simulation results reveal that the forward shock of the consequent SNR sweeps up the modified ambient media,shaping the overall morphology with a blowout comparable to that of ***,a series of simulation runs are performed to assess the impacts of different model parameters and the projection effect (observational angle θobs) on the final SNR *** physical quantities are extracted from simulation results to characterize the simulated SNR and make a direct comparison with the X-ray observations of *** find that the final SNR morphology is sensitive to both stellar-wind properties and θobs.A Cygnus-Loop-like SNR could be reproduced under appropriate parameter combinations at θobs=0°.While for ■,the projected morphology akin to CL could be also generated under specific conditions.

关键词： hydrodynamics ISM: supernova remnants methods: numerical

Relationship between preoperative staging by endoscopic ultrasonography and MMP-9 expression in gastric carcinoma

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World Journal of Gastroenterology 2007年第14期13卷 2108-2112页

作者： Shi-yun Tan jun-yu Wang Lei shen He-sheng Luo Zhi-Xiang shen Department of Gastroenterology Renmin Hospital Wuhan University Wuhan 430060 Hubei Province China

AIM: To investigate the relationship between the staging by endoscopic ultrasonography (EUS) and the expression of carcinoma metastasis associated gene in the patients with gastric carcinoma. METHODS: Sixty-three patients with gastric cancer were diagnosed by electric gastroscopy and EUS. The preoperative staging of gastric cancer was measured by EUS and compared with pathologic staging and MMP-9 expression. Peripheral serum level of MMP-9 was measured with enzyme-linked immunosorbent assay (ELISA), while the expression of MMP-9 protein was tested with immunohistochemistry and hybridization in situ in the gastric carcinoma tissues. RESULTS: The total accuracy of EUS in estimating invasive depth of gastric cancer was 80.95%, while that in estimating lymphatic metastasis was 73.02%. Serum MMP-9 levels were consistent with the expression of MMP-9 protein and MMP-9 mRNA in tissue, a result closely correlated with invasive degree, staging with EUS and lymphatic metastasis in gastric cancer (P < 0.05). The total accuracy of estimating invasive depth in gastric cancer was 95.22% using both EUS and MMP-9. CONCLUSION: The MMP-9 level of preoperative serum presents the reference value for preoperative staging by EUS in the patients with gastric cancer. When serum MMP-9 level in gastric cancer is significantly high, physicians should pay closer attention to the metastasis which reaches the serosa or beyond. Combining EUS and MMP-9 improves the accuracy in deciding the invasion and metastasis in the patients with gastric carcinoma.

关键词： Endoscopic ultrasonography Stomachneoplasm Gastroscopy Neoplasm staging Matrixmetalloproteimase 9

Insights into photocatalytic mechanism over a novel Cu_(2)WS_(4)/MoS_(2) S-scheme heterojunction

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Rare Metals 2024年第7期43卷 3118-3133页

作者： Wei Zhao Ji-Hui Cao jun-Jie Liao yun Liu Xiao-jun Zeng jun-yu shen Xue-Kun Hong Yang Guo He-Hua Zeng Ya-Zi Liu School of Materials Engineering Jiangsu Key Laboratory of Advanced Functional MaterialsSchool of Electronic and Information EngineeringChangshu Institute of TechnologyChangshu215500China School of Chemistry and Chemical Engineering Changji UniversityChangji 831100China State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control Ministry of Ecology and EnvironmentNanjing Institute of Environmental SciencesNanjing 210023China School of Environment Jiangsu Engineering Lab of Water and Soil Eco-RemediationNanjing Normal UniversityNanjing 210023China Department of Chemical Engineering Curtin UniversityPerthWA6845Australia

A novel efficient Cu_(2)WS_(4)/MoS_(2) step-scheme(S-scheme)heterojunction photocatalyst was constructed for the first time and applied in the removal of environmental *** the as-prepared photocatalysts,the Cu_(2)WS_(4)/MoS_(2)-8%heterojunc tion photoc atalyst demonstrates the optimal photocatalytic performance,with the catalytic oxidation efficiency of tetracycline(TC)and the catalytic reduction efficiency of Cr^(6+)reaching 93.3%and 82.1%,*** excellent catalytic properties of Cu_(2)WS_(4)/MoS_(2) heterojunction photocatalysts are attributed to the effective separation pathways of charges and the presence of S-scheme heterojunctions,together with stronger redox *** is speculated that the photogenerated carrier migration path of the Cu_(2)WS_(4)/MoS_(2) catalyst follows the typical S-scheme photocatalytic mechanism,which is verified by the in-depth experimental study and simulated calculations including the electron paramagnetic resonance(EPR)analysis,free radical quenching experiments,charge density distribution,and simulated built-in electric field formation at the interface,which acts as driving force to promote the separation of photoinduced electrons and ***,the photocatalytic mechanism of S-scheme photogenerated carrier migration for the Cu_(2)WS_(4)/MoS_(2) catalyst is revealed based on the systematic experimental techniques and simulated calculations,accounting for its superior photocatalytic oxidation and reduction *** study provides inspiring implications to develop high-efficient S-scheme photocatalytic systems for versatile applications in solarenergy conversion.

关键词： Cu_(2)WS_(4)/MoS_(2) S-scheme Heterojunction Photocatalysis

Clinical research of comprehensive rehabilitation in treating brachial plexus injury patients

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Chinese Medical Journal 2012年第14期125卷 2516-2520页

作者： ZHOU jun-ming GU yu-dong XU Xiao-jun ZHANG shen-yu ZHAO Xin Department of Hand Surgery Huashan Hospital Fudan UniversityKey Laboratory of Hand Reconstruction Ministry of HealthShanghai Key Laboratory of Peripheral Nerve and MicrosurgeryShanghai 200040 China

Background Brachial plexus injury is one of the difficult medical problems in the world. The aim of this study was to observe the clinical therapeutic effect of comprehensive rehabilitation in treating dysfunction after brachial plexus injury. Methods Forty-three cases of dysfunction after brachial plexus injury were divided into two groups randomly. The treatment group, which totaled 21 patients （including 14 cases of total brachial plexus injury and seven cases of branch brachial plexus injury）, was treated with comprehensive rehabilitation including transcutaneous electrical nerve stimulation, mid-frequency electrotherapy, Tuina therapy, and occupational therapy. The control group, which totaled 22 patients （including 16 cases of total brachial plexus injury and six cases of branch brachial plexus injury）, was treated with home-based electrical nerve stimulation and occupational therapy. Each course was of 30 days duration and the patients received four courses totally. After four courses, the rehabilitation effect was evaluated according to the brachial plexus function evaluation standard and electromyogram （EMG） assessment. Results In the treatment group, there was significant difference in the scores of brachial plexus function pre- and post-treatment （P 〈0.01） in both ＂total＂ and ＂branch＂ injury. The scores of two ＂total injury＂ groups had statistical differences （P 〈0.01）, while the scores of two ＂branch injury＂ groups had statistical differences （P 〈0.05） after four courses. EMG suggested that the appearance of regeneration potentials of the recipient nerves in the treatment group was earlier than the control group and had significant differences （P 〈0.05）. Conclusion Comprehensive rehabilitation was more effective in treating dysfunction after brachial plexus injury than nonintegrated rehabilitation.

关键词： brachial plexus injury comprehensive rehabilitation therapeutic effects

Distribution of donor states on the surface of AlGaN/GaN heterostructures

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Chinese Physics B 2021年第12期30卷 620-624页

作者： yue-Bo Liu Hong-Hui Liu jun-yu shen Wan-Qing Yao Feng-Ge Wang yuan Ren Min-Jie Zhang Zhi-sheng Wu Yang Liu Bai-jun Zhang School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510006China State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 510275China

The uniform distribution model of the surface donor states in AlGaN/GaN heterostructures has been widely used in the theoretical calculation.A common and a triple-channel AlGaN/GaN heterostructure Schottky barrier diodes have been fabricated to verify the models,but the calculation results show the uniform distribution model can not provide enough electrons to form three separate 2DEGs in the triple-channel Al GaN/GaN *** experiments indicate the uniform distribution model is not quite right,especially for the multiple-channel AlGaN/GaN ***,it is found the exponential distribution model possibly matches the actual distribution of the surface donor states better,which allows the 2DEG to form in each channel structure during the *** exponential distribution model would be helpful in the research field.

关键词： AlGaN/GaN surface states exponent distribution

Abnormal phenomenon of source-drain current of AlGaN/GaN heterostructure device under UV/visible light irradiation

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Chinese Physics B 2021年第11期30卷 524-531页

作者： yue-Bo Liu jun-yu shen Jie-Ying Xing Wan-Qing Yao Hong-Hui Liu Ya-Qiong Dai Long-Kun Yang Feng-Ge Wang yuan Ren Min-Jie Zhang Zhi-sheng Yang Liu Bai-jun Zhang School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510006China State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 510275China

We report an abnormal phenomenon that the source-drain current(I_(D))of AlGaN/GaN heterostructure devices decreases under visible light *** the incident light wavelength is 390 nm,the photon energy is less than the band gaps of GaN and AlGaN whereas it can causes an increase of *** on the UV light irradiation,a decrease of I_(D) can still be observed when turning on the visible *** speculate that this abnormal phenomenon is related to the surface barrier height,the unionized donor-like surface states below the surface Fermi level and the ionized donor-like surface states above the surface Fermi *** visible light,its photon energy is less than the surface barrier height of the AlGaN *** electrons bound in the donor-like surface states below the Fermi level are excited and trapped by the ionized donor-like surface states between the Fermi level and the conduction band of *** electrons trapped in ionized donor-like surface states show a long relaxation time,and the newly ionized donor-like surface states below the surface Fermi level are filled with electrons from the two-dimensional electron gas(2DEG)channel at AlGaN/GaN interface,which causes the decrease of *** the UV light,when its photon energy is larger than the surface barrier height of the AlGaN layer,electrons in the donor-like surface states below the Fermi level are excited to the conduction band and then drift into the 2DEG channel quickly,which cause the increase of ID.

关键词： AlGaN/GaN heterostructure two-dimensional electron gas(2DEG) surface states irradiation

Inflammation-induced ER stress and ARMET expression in antigen-induced arthritis

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Inflammation-induced ER stress and ARMET expression in antig...

From waste to wealth:Coal tar residue derived carbon materials as low-cost anodes for potassium-ion batteries

第十届全国抗炎免疫药理学学术会议

作者： Li-Jie Feng,Chang-Liang yu,Xue-Gui Huang,Fa-Cai Wang,yu-jun shen,Yong-Qiang yu,Hai-Ping Wang,yu-Xian shen,jun Li

Introduction:Rheumatoid arthritis(RA) is an inflammatory,progressive,destructive autoimmune disease with synovial hyperplasia followed by impairment of quality of ***,its exact mechanism(s) is not fully *** reticulum(ER) stress has been shown to be involved in the pathogenesis of several diseases,including autoimmune ***-rich,mutated

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 464-475页

作者： Zhonghua Lu jun shen Xin Zhang Lingcong Chao Liang Chen Ding Zhang Tao Wei Shoudong Xu College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China College of Chemistry Taiyuan University of TechnologyTaiyuan 030024China School of Chemical Engineering and Pharmacy Wuhan Institute of TechnologyWuhan 430205China School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China

Carbon materials are widely recognized as highly promising electrode materials for various energy storage system *** tar residues(CTR),as a type of carbon-rich solid waste with high value-added utilization,are crucially important for the development of a more sustainable *** this study,we employed a straightforward direct carbonization method within the temperature range of 700-1000℃to convert the worthless solid waste CTR into economically valuable carbon materials as anodes for potassium-ion batteries(PIBs).The effect of carbonization temperature on the microstructure and the potassium ions storage properties of CTR-derived carbons(CTRCs)were systematically explored by structural and morphological characterization,alongside electrochemical performances *** on the co-regulation between the turbine layers,crystal structure,pore structure,functional groups,and electrical conductivity of CTR-derived carbon carbonized at 900℃(CTRC-900H),the electrode material with high reversible capacity of 265.6m Ah·g^(-1)at 50 m A·g^(-1),a desirable cycling stability with 93.8%capacity retention even after 100 cycles,and the remarkable rate performance for PIBs were ***,cyclic voltammetry(CV)at different scan rates and galvanostatic intermittent titration technique(GITT)have been employed to explore the potassium ions storage mechanism and electrochemical kinetics of *** indicate that the electrode behavior is predominantly governed by surface-induced capacitive processes,particularly under high current densities,with the potassium storage mechanism characterized by an“adsorption-weak intercalation”*** work highlights the potential of CTR-based carbon as a promising electrode material category suitable for high-performance PIBs electrodes,while also provides valuable insights into the new avenues for the high value-added utilization of CTR.

关键词： coal tar residue carbon materials anode potassium-ion batteries high value-added

Effect of cholesterol metabolism on hepatolithiasis

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World Journal of Gastroenterology 2025年第1期31卷 157-162页

作者： Lin Zheng Zi-yu Ye jun-Ji Ma Department of Gastroenterology The Second Hospital of Hebei Medical UniversityHebei Key Laboratory of GastroenterologyHebei Institute of GastroenterologyHebei Clinical Research Center for Digestive DiseasesNo.215 Heping West RoadShijiazhuang 050000Hebei ProvinceChina

Surgical intervention is currently the primary treatment for hepatolithiasis;how-ever,some patients still experience residual stones and high recurrence rates after *** metabolism seems to play an important role in hepatoli-thiasis pathogenesis.A high cholesterol diet is one of the significant reasons for the increasing incidence of ***,regular diet and appropriate medical intervention are crucial measures to prevent hepatolithiasis and reduce recurrence rate after *** dietary cholesterol and drugs that increase cholesterol stone solubility are key therapeutic approaches in treating *** article discusses the cholesterol metabolic pathways related to the pathogenesis of hepatolithiasis,as well as food intake and targeted therapeutic drugs.

关键词： Hepatolithiasis Cholesterol metabolism High-fat diet 3-hydroxy-3-methylglutaryl-coenzyme A reductase Interlobular bile duct