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Positron annihilation study of defect formation and evolution in matrix graphite under He ion irradiation

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Nuclear Science and Techniques 2025年第1期36卷 13-21页

作者： Hong-xia xu Jian-Dang Liu Bang-Jiao Ye Zi-Wen Pan Jun Lin Jin-Liang Song Jian-Qing Cao Chao Yan Ying-Ping Hao Jin-Xing Cheng Qing-Bo Wang Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai 200025China Beijing Institute of High Technology Beijing 100094China

The stability of matrix graphite under neutron irradiation and in corrosive environments is crucial for the safe operation of molten salt reactors(MSRs).Raman spectroscopy and a slow positron beam were employed to investigate the effects of He ion irradiation fluences and subsequent annealing on the microstructure and defects of the matrix *** ions with 500 keV energy and fluences ranging from 1.1×10^(15)ions∕cm^(2)to 3.5×10^(17)ions∕cm^(2)were used to simulate neutron irradiation at 300 *** samples with an irradiation fluence of 3.5×10^(16)ions∕cm^(2)were subjected to isochronal annealing at different temperatures(573 K,873 K and 1173 K)for 3 *** Raman results revealed that the D peak gradually increased,whereas the intrinsic G peak decreased with increasing irradiation *** the same irradiation fluence,the D peak gradually decreased,whereas the intrinsic G peak increased with increasing annealing *** positron beam analysis demonstrated that the density or size of irradiation defects(vacancy type)increased with higher irradiation fluence,but decreased rapidly with increasing annealing *** Raman spectral analysis of sample cross sections subjected to high irradiation fluences revealed the emergence of amorphization precisely at the depth where ion damage was most pronounced,whereas the surface retained its crystalline *** and positron annihilation analyses indicated that the matrix graphite exhibited good irradiation resistance to He ions at 300 ***,vacancy-type defects induced by He ion irradiation exhibit poor thermal stability and can be easily removed during annealing.

关键词： Graphite Positron annihilation Irradiation Raman spectrum

Efficacy and safety of combined Kahook Dual Blade goniotomy with phacoemulsification in Chinese patients with primary open angle glaucoma

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International Journal of Ophthalmology(English edition) 2025年第2期18卷 268-274页

作者： Lin Fu Jiang-Tao Lou Yue Guo Pei-Juan Wang Rong-Rong Le Shu-xia xu Guo-Xing Li Yuan-Bo Liang National Clinical Research Center for Ocular Diseases Eye HospitalWenzhou Medical UniversityWenzhou 325003Zhejiang ProvinceChina

AIM:To report the one-year surgical outcome Kahook Dual Blade goniotomy combined with phacoemulsification(KDB-Phaco)in Chinese patients with primary open angle glaucoma(POAG).METHODS:This is a retrospective study included 43 eyes of 28 Chinese POAG patients with cataract who accepted KDB-Phaco and followed-up for *** pressure(IOP),glaucoma medications and surgical complications were *** 1 and success 2 was defined as 5-21 mm Hg and 5-18 mm Hg,and success plus was determined if additional criteria of IOP reduction≥20%from baseline was reached.A corrected IOP by adding 3 mm Hg for each medication was used to do correlation ***’s proportional hazards regression model was used to test the hazard ratio for factors associated with surgical ***:After a 12-month follow up,the IOP decreased from 28.1±6.3 to 13.8±3.0 mm Hg(47.92%reduction,P<0.001),and the medications used decreased from 2.0(1.0)to 0.0(0.0)(95%reduction,P<0.001).The mean IOP of all postoperative visits were lower than preoperative IOP(all P<0.001),so as the number of glaucoma medications(all P<0.001).Complete success 1 and qualified success 1 were 87.80%and 100.00%*** complete success 1 plus and qualified success 1 plus were 85.37%and 97.56%,*** 82.93%and 90.24%of patients got complete success 2 and qualified success 2 while 80.49%and 87.80%of patients satisfied complete success 2 plus and qualified success 2 ***(r=-0.511,P=0.001)and visual acuity(VA;r=-0.321,P=0.041)were negatively correlated with postoperative corrected IOP at 12mo,while anterior chamber depth(r=0.432,P=0.005),mean deviation(r=0.617,P<0.001)and visual field index(r=0.524,P<0.001)were positively correlated with *** VA(OR=33.092,P=0.004)and MD(OR=1.481,P=0.018)were hazard factors associated with failure based on qualified success as 18 mm *** main complications of KDB were hyphema(9.30%),IOP spike(11.63%)and peripheral anterior synechia(6.98%).CONCLUSI

关键词： Kahook Dual Blade goniotomy primary open angle glaucoma success rate risk factors

Cardiovascular response to nanosecond pulses is milder in percutaneous ablation of hepatocellular carcinoma compared with microsecond pulses

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Hepatobiliary & Pancreatic Diseases International 2025年第1期24卷 114-116页

作者： Hai-Ying Kong Qian-Hui Jin Xin-Hua Chen Dan-xia xu Qi-Yu Zhao Xiong-Xin Zhang R James Swanson Tian-An Jiang Department of Anesthesiology The First Affiliated Hospital Zhejiang University School of Medicine Division of Hepatobiliary Pancreatic Surgery Department of Surgery The First Hospital of Jiaxing Jiaxing University College of Medicine Key Laboratory of Pulsed Power Translational Medicine of Zhejiang Province Department of Ultrasound Medicine The First Affiliated Hospital Zhejiang University School of Medicine Anatomy Department Liberty University College of Osteopathic Medicine

To the Editor:Irreversible electroporation (IRE)isapromising ablativetechnique for hepatobiliary cancers. IRE has unique advantages, including no detrimental heat sink effect [1] and no injury of the surroundingtissues[2].Forlesionsincomplexareas,bileduct[3],and large blood vessels [4], IRE has been developed as an alternative to thermal ablation such as radiofrequency and *** ***-voltage,highfrequencyandtransientpulsescancreateirreversibleelectroporation in the phospholipid bilayer of the cell membrane and nuclear envelope, resulting in cell apoptosis. Compared with radiofrequencyablationandmicrowaveablation[5],IREdoesnotcause *** shortcomingsindeliveringhighcurrents,whichhaslimitedits clinical applications in the past. In animal and clinical studies, side effects including muscle contraction, procedural hypertension, and arrhythmia are frequently reported [6]. However, during the ablation process, if the pulse is synchronized with the heart rhythm,the risk of arrhythmia is reduced. Sufficient muscle relaxant ***,arrhythmia[7],hypertension[8],

关键词： microwave consequences ablation

小檗碱通过补体和凝血级联改善川崎病冠状动脉内皮细胞损伤的研究

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中国当代儿科杂志 2025年第1期27卷 101-108页

作者：廖锦文郭鑫梁波李许霞徐明国深圳市龙岗区妇幼保健院/汕头大学医学院龙岗妇幼临床学院广东深圳518172 深圳市龙岗区第三人民医院儿科广东深圳518020

目的探讨小檗碱(berberine,BBR)通过调节补体和凝血级联改善川崎病(Kawasaki disease,KD)冠状动脉内皮细胞损伤的作用。方法将人冠状动脉内皮细胞(human coronary artery endothelial cell,HCAEC)分为健康对照组、KD组和BBR处理组(各组n... 详细信息

目的探讨小檗碱(berberine,BBR)通过调节补体和凝血级联改善川崎病(Kawasaki disease,KD)冠状动脉内皮细胞损伤的作用。方法将人冠状动脉内皮细胞(human coronary artery endothelial cell,HCAEC)分为健康对照组、KD组和BBR处理组(各组n=3)。健康对照组、KD组分别加入健康儿童和KD患儿的15%血清,BBR处理组加入KD患儿的15%血清后再加入浓度20 mmol/L BBR。采用同位素标记相对和绝对定量技术和液相色谱-串联质谱技术分析和鉴定差异蛋白表达,并对差异蛋白进行GO功能富集分析和KEGG信号通路富集分析;采用Western blot法检测差异蛋白表达。结果KD组与健康对照组之间共鉴定出518个差异蛋白(上调蛋白300个,下调蛋白218个)。BBR处理组与KD组之间共鉴定出422个差异蛋白(上调蛋白221个,下调蛋白201个)。生物信息学分析结果显示,与健康对照组比较,KD组差异蛋白富集于补体和凝血级联、真核生物的核糖体生物发生;与KD组比较,BBR处理组差异蛋白富集于补体和凝血级联、真核生物的核糖体生物发生。Western blot结果显示,与健康对照组比较,KD组补体C1q亚组分亚基C(complement C1q subcomponent subunit C,C1QC)、激肽原-1(kininogen-1,KNG1)、补体C1s子组件(complement C1s subcomponent,C1S)、C4b结合蛋白α链(C4bbinding protein alpha chain,C4BPA)蛋白表达升高(P<0.05);与KD组比较,BBR处理组KNG1、C1S、C1QC、C4BPA蛋白表达降低(P<0.05)。结论补体和凝血级联可能参与调控BBR治疗KD冠状动脉损伤,C1QC、KNG1、C1S和C4BPA可作为其生物标志物。

关键词：川崎病小檗碱补体和凝血级联冠状动脉病变人冠状动脉内皮细胞

网络互动与企业创新绩效——基于技术信息的调节机制

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山西财经大学学报 2025年第2期47卷 85-98页

作者：赵明明吴福象徐霞南京大学经济学院中南民族大学管理学院

提高创新绩效不仅需要增强企业内部的创新能力，也需要重视外部环境中的技术信息。基于对企业在创新合作网络中的互动水平与其创新绩效之间关系的讨论，分析网络中的互补性和竞争性技术信息如何影响这种关系。研究发现：（1）企业的网... 详细信息

提高创新绩效不仅需要增强企业内部的创新能力，也需要重视外部环境中的技术信息。基于对企业在创新合作网络中的互动水平与其创新绩效之间关系的讨论，分析网络中的互补性和竞争性技术信息如何影响这种关系。研究发现：（1）企业的网络互动水平与其创新绩效之间呈显著的倒“U”型关系；（2）网络中的互补性技术信息正向调节了网络互动水平与创新绩效之间的关系；（3）网络中的竞争性技术信息反向调节了网络互动水平与创新绩效之间的关系。

关键词：创新合作网络网络互动技术关联互补性技术信息竞争性技术信息创新速度创新质量创新新颖性

Exact mobility edges and topological phase transition in two-dimensional non-Hermitian quasicrystals

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Science China(Physics,Mechanics & Astronomy) 2022年第2期65卷 82-90页

作者： Zhi-Hao xu xu xia Shu Chen Institute of Theoretical Physics and State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi UniversityTaiyuan 030006China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Chern Institute of Mathematics and LPMC Nankai UniversityTianjin 300071China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Yangtze River Delta Physics Research Center Liyang 213300China

The emergence of the mobility edge(ME)has been recognized as an important characteristic of Anderson *** difficulty in understanding the physics of the MEs in three-dimensional(3 D)systems from a microscopic image encourages the development of models in lower-dimensional systems that have exact *** most of the previous studies are concerned with one-dimensional(1 D)quasiperiodic systems,the analytic results that allow for an accurate understanding of two-dimensional(2 D)cases are *** this work,we disclose an exactly solvable 2 D quasicrystal model with parity-time(PT)symmetry displaying exact *** the thermodynamic limit,we unveil that the extended-localized transition point,observed at the PT symmetry breaking point,is topologically characterized by a hidden winding number defined in the dual *** coupling waveguide platform can be used to realize the 2 D non-Hermitian quasicrystal model,and the excitation dynamics can be used to detect the localization features.

关键词： quasicrystals mobility edges non-Hermitian systems localization properties

Floral Ontogeny of Two Species in Magnolia L.

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Journal of Integrative Plant Biology 2006年第10期48卷 1197-1203页

作者： Feng-xia xu South China Botanical Garden the Chinese Academy of Sciences Guangzhou 510650 China

Floral ontogeny is described in two species of genus Magnolia （Magnollaceae）, Magnolia alboserlcea Chun et C. Tsoong, and M. amoena Cheng, representing subgenus Magnolia and subgenus Yulani In Magnolia, by using scanning electron microscope （SEM）. The sequence of Initiation of floral organs Is from proximal to distal. The three distinct outermost and middle organs are Initiated in sequence, but ultimately form a single whorl, thus their ontogeny Is consistent with a sepal Interpretation. The last three tepals （petals） alternate with the preceding tepal whorl. The members of androeclum and gynoeclum arise spirally, although the androecium shows some Intermedlacy between a spiral and whorled arrangement. The carpel prlmordia initiate in group of four to five. The order of stamen Initiation within each tier Is not determined. The floral ontogeny Is remarkably homogeneous between the subgenus Magnolia and subgenus Yulani that does not support the resuming of genus Yulani.

关键词： floral ontogeny Magnolia albosericea Magnolia amoena subgenus Magnolia subgenus Yulania

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基于成本因素的不同建筑用胶改性及材料控制

粘接 2025年第1期52卷 8-11页

作者：鲍莉荣徐霞南京工业大学浦江学院江苏南京211200

基于成本控制对建筑用胶的设计与应用需求,本文以传统氰酸酯胶粘剂为研究对象,通过在胶粘剂中加入苯酚、对苯二酚、间苯二酚和间苯三酚等改性剂的方法,考察了其对建筑用胶热稳定性、粘接性能等影响,并分析了基于成本控制的建筑用胶的应... 详细信息

基于成本控制对建筑用胶的设计与应用需求,本文以传统氰酸酯胶粘剂为研究对象,通过在胶粘剂中加入苯酚、对苯二酚、间苯二酚和间苯三酚等改性剂的方法,考察了其对建筑用胶热稳定性、粘接性能等影响,并分析了基于成本控制的建筑用胶的应用。结果表明,无论是苯酚、对苯二酚、间苯二酚和间苯三酚改性前还是改性后,胶粘剂的红外光谱图中的特征峰位置差异不大,都存在—OH特征吸收峰、—CH_(3)特征峰、—OCN特征峰、C=N特征峰和Cr0特征峰。在胶粘剂中加入苯酚、对苯二酚、间苯二酚和间苯三酚等改性剂后,胶粘剂试样的热稳定性有不同程度增大,焦炭产量有少量增加,表明改性胶粘剂能够保证氰酸酯胶粘剂有良好热稳定性。在胶粘剂中加入苯酚、对苯二酚、间苯二酚和间苯三酚等改性剂后,胶粘剂试样的剪切强度都有不同程度的增大。基于成本控制的建筑用胶的适宜改性剂添加为1%的对苯二酚。

关键词：成本控制建筑用胶改性热稳定性粘接性能

Improved ethane conversion to ethylene and aromatics over a Zn/ZSM-5 and CaMnO^(3-δ) composite catalyst

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Journal of Energy Chemistry 2020年第12期29卷 161-166页

作者： Yan Zhang xia xu Heqing Jiang Key Laboratory of Biofuels Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101ShandongChina University of Chinese Academy of Sciences Beijing 100049China

Ethane conversion to ethylene and aromatics over Zn/zeolite catalysts is a promising technology for efficient exploitation of light alkanes. However, the reaction faces two major hurdles including the limited ethane conversion due to thermodynamics and the drastic catalyst deactivation by kinetical coke accumulation. Here we present a route to improve ethane conversion using a composite catalyst, involving Zn/HZSM-5 for ethane dehydroaromatization and CaMnO3-δperovskite for in situ selective hydrogen oxidation. The in situ H2 consumption shifts ethane dehydrogenation equilibrium to the desired side and can obviously increase the yield of target product. Furthermore, it is found that the in situ generated H2 O through H2 combustion can significantly suppress the coke formation and consequently enhance the stability of the composite catalyst. After 400 min reaction, a product yield of 23% was retained over the composite catalyst, almost a threefold increase with respect to the Zn/HZSM-5 reference(8%). It is anticipated that this novel composite catalyst combined with an efficient reactor technology may improve the viability of ethane aromatization in utilization.

关键词： Ethane aromatization Composite catalyst Zn/HZSM-5 CaMnO^(3-δ) Hydrogen consumption