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Microstructure and properties of Al_(0.3)CrFe_(1.5)MnNi_(0.5)Ti_x and Al_(0.3)CrFe_(1.5)MnNi_(0.5)Si_x high-entropy alloys

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Rare Metals 2014年第2期33卷 149-154页

作者： Bo Ren Rui-Feng Zhao Zhong-Xia Liu Shao-Kang Guan hong-song zhang School of Materials Science and Engineering Zhengzhou University School of Mechanical Engineering Henan Institute of Engineering

In this article, the microstructure, hardness, and corrosion resistance of the Al0.3CrFe1.5MnNi0.5Tixand Al0.3CrFe1.5MnNi0.5Six（x = 0, 0.2, 0.5, 1.0） high-entropy alloys were investigated via X-ray diffraction（XRD）scanning electron microscopy（SEM）, digital display Vickers hardness tester, and electrochemical technique These alloys are mainly composed of BCC solid-solution structure. When adding high content of Ti or Si elemen（x C 0.5）, some intermetallic compounds are found in the microstructure, which makes the alloys have a high hardness, high brittleness, and easy cracking. While the alloys with low content of Ti or Si（x = 0.2） have a hardness of HV 420–HV 430, and its hardness increases about 14 %compared with that of Al0.3CrFe1.5MnNi0.5. Electrochemical results in 3.5 % NaCl solution show that the alloying elements Ti and Si have a negative influence on the corrosion resistance of the Al0.3CrFe1.5MnNi0.5alloys.

关键词： High-entropy alloy Microstructure Hardness Corrosion resistance Solid-solution strengthening

Efficacy of conbercept after switching from bevacizumab/ranibizumab in eyes of macular edema secondary to central retinal vein occlusion

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International Journal of Ophthalmology(English edition) 2022年第4期15卷 609-614页

作者： Tong Zhao You Chen hong-song zhang Yi Chen Zhi-Jun Wang Department of Ophthalmology China-Japan Friendship HospitalBeijing 100029China

AIM: To explore the efficacy of conbercept after switching from bevacizumab/ranibizumab in eyes of central retinal vein occlusion(CRVO) through optical coherence tomography angiography(OCTA). METHODS: Patients with prior treatment of a minimum of three consecutive intravitreal injections of either bevacizumab or ranibizumab, followed by injection of conbercept, were recruited. The minimal follow-up period after switching was 12 mo. Central retinal thickness(CRT), best-corrected visual acuity(BCVA), the interval of injections was reviewed. Perfusion density(PD) and vascular length density(VLD) of superficial and deep capillary plexus were acquired from OCTA images before and after switching. RESULTS: Twenty-four eyes were included. CRT significantly decreased from 460.71±153.23 μm(before switching) to 283.92±38.27 μm at the end of follow-up(P<0.001). However, BCVA gained to some extent(from 0.98±0.33 to 0.76±0.42 log MAR) but the difference was not significant(P=0.070). After switching to conbercept the injection interval extended from 5.2±2.3 wk to 8.3±3.9 wk(P=0.012). At the end of follow-up, PD of deep retinal layer decreased significantly compared with before switching(from 34.62%±5.27% to 33.26%±5.82%, P=0.016), similar result was found in VLD of deep retinal layer but not in PD or VLD in superficial ***: In cases of refractory macular edema secondary to CRVO, switching to conbercept improves macular thickness and extends interval of injection. Retinal microvasculature cannot improve with treatment of conbercept.

关键词： conbercept central retinal vein occlusion switching

The Observation of Martensite and Magnetic Domain Structures in Ni_(53)Mn_(24)Ga_(23) Shape Memory Alloys by Scanning Electron Acoustic Microscopy and Scanning Thermal Microscopy

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Chinese Physics Letters 2012年第5期29卷 70-73页

作者： ZHAO Kun-Yu ZENG Hua-Rong song hong-zhang HUI Sen-Xing LI Guo-Rong YIN Qing-Rui Key Laboratory of Inorganic Functional Materials and Devices Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050 School of Physical Engineering and Material Physics Laboratory Zhengzhou UniversityZhengzhou 450052

We present observations of martensite variants and ferromagnetic domain structures of Ni_(53)Mn_(24)Ga_(23) ferromagnetic shape memory alloys with a pure tetragonal martensitic phase by using scanning electron aconstic microscopy (SEAM) and scanning thermal microscopy (SThM).Electron acoustic images show a polycrystalline morphology with martensite *** coincidence between crystallographic martensitic twin variants and magnetic domains is found.A domain-like structure,obtained by SThM,is firstly reported,and then confirmed by magnetic force microscopy (MFM).The experimental results will be helpful for investigating the local thermal properties of ferromagnets and understanding the relationship between martensite variants and magnetic domains.

关键词： martensite martensitic Electron

Early vitrectomy combined with pan retinal photocoagulation, anti-vascular endothelial growth factor, and gradual cyclophotocoagulation for treatment of neovascular glaucoma

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Chinese Medical Journal 2019年第20期132卷 2518-2520页

作者： Chuan Sun hong-song zhang Yu-Jie Yan Tong Zhao Ai-hong Li Yan Tang Zhi-Jun Wang Department of Ophthalmology China-Japan Friendship HospitalBeijing 100029China

To the editor: Neovascular glaucoma (NVG) is refractory glaucoma characterized by neovascularization of iris or anterior chamber angle, which often leads to dramatic elevation of intraocular pressure (IOP) and severe vision loss.[1] Series of studies have been reported regarding managing NVG with anti-vascular endothelial growth factor (VEGF) therapy or in combination with anti-glaucoma surgery.[2,3,4] However, the effect of anti-VEGF seems only temporary and it does not improve the prognosis in the long term.[5] Therefore, pan retinal photocoagulation (PRP) remains necessary for improving long term prognosis.[5] However, it is not easy to complete PRP early in NVG patients due to corneal edema, hyphema, or vitreous hemorrhage. We conducted this prospective interventional case series study to propose a protocol which could confine NVG in an early stage. The aims of our treatment modalities included that controlling IOP immediately, complete PRP as soon as possible, anti-VEGF as adjuvant and controlling residual glaucoma with gradual cyclophotocoagulation.

关键词： glaucoma treatment surgery

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铁电体中相变临界尺寸的研究现状

无机材料学报 2007年第4期22卷 583-589页

作者：宋红章李永祥殷庆瑞中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室

从铁电薄膜和铁电颗粒两大方面回顾了处理尺寸效应的理论研究方法(包括宏观的热力学唯像理论、微观的横场Ising模型和第一性原理计算)和铁电相变临界尺寸的理论预测.总结了从50年代以来实验中观测到的各种铁电材料的临界尺寸,简单介绍... 详细信息

从铁电薄膜和铁电颗粒两大方面回顾了处理尺寸效应的理论研究方法(包括宏观的热力学唯像理论、微观的横场Ising模型和第一性原理计算)和铁电相变临界尺寸的理论预测.总结了从50年代以来实验中观测到的各种铁电材料的临界尺寸,简单介绍了铁电纳米陶瓷的一些尺寸效应,并叙述了近几年才开始报道的铁电纳米线中的铁电相变.最后指出了目前研究现状中存在的一些问题.

关键词：铁电薄膜铁电颗粒铁电陶瓷铁电纳米线相变临界尺寸

关于完善现行《医疗事故分级标准(试行)》的设想

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中国医院管理 2006年第11期26卷 21-23页

作者：李国红宋洪章中华医学会医疗事故技术鉴定工作办公室北京100710

《医疗事故分级标准(试行)》使用过程中遇到的主要问题有：对判定器官损害程度的基准未予说明,例举情形相对不足,例举条目中存在有失均衡、文字错误、有悖《医疗事故处理条例》精神及难以把握的情况。通过对问题的分析,提出现行标准需... 详细信息

《医疗事故分级标准(试行)》使用过程中遇到的主要问题有：对判定器官损害程度的基准未予说明,例举情形相对不足,例举条目中存在有失均衡、文字错误、有悖《医疗事故处理条例》精神及难以把握的情况。通过对问题的分析,提出现行标准需要进一步完善,并对修改方式进行了探讨,为今后标准的修改、完善提供参考。

关键词：医疗事故伤残评定标准

Synergistically enhanced ORR and HER performance on Co-N-C coupled in-situ generated PtCo intermetallic

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Journal of Energy Chemistry 2025年第1期100卷 721-729页

作者： Guanyu Luo Min song Lulu An Xiao Huang Qian zhang Chenhao zhang Tao Shen Shuang Wang Deli Wang Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology) Ministry of Education School of Chemistry and Chemical Engineering Huazhong University of Science and Technology

Integrating multi-scale sites in a composite catalyst is vital to realize efficient ***,a synergistic composite catalyst consisting of Co atomic sites and in-situ generated PtCo intermetallic compounds （IMCs）(o-PtCo@CoNC) is proposed through Co pre-anchoring and subsequent impregnation-reduction *** loading of Co atoms provides a chance for in-situ generating PtCo ordered intermetallic *** remaining Co single atoms and PtCo IMCs construct synergistic electrocatalytic *** from the ordered structure,synergistic effect of Pt Co IMCs and Co single atoms,o-PtCo@CoNC exhibits excellent electrocatalytic performance for oxygen reduction reaction （ORR） and hydrogen evolution reaction （HER） with mass activity of 1.21 A mgPt-1（at 0.9 V） and5.70 A mgPt-1（at an overpotential of 100 mV）,***,o-PtCo@CoNC delivers negligible loss of half-wave potential and overpotential during long-term stability test in acid solutions,with 13 mV decay after 50,000 potential cycles for ORR and a 2.7 mV decay after 20,000 potential cycles for *** integration strategy of single-atomic sites coupled IMCs paves the way for enhancing the activity and durability of Pt-based electrocatalysts.

关键词： Electrolytic reduction

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水热法制备稳定氧化锆纳米粉体

表面技术 2017年第9期46卷 95-100页

作者：徐高峰宋红章杨德林郑州大学物理工程学院材料物理教育部重点实验室郑州450001

目的制备分散性好、粒径分布窄的稳定氧化锆纳米粉体。方法采用水热法制备氧化锆纳米粉体,考察水热时间、p H值、温度和有机添加剂丙三醇,对氧化锆粉体颗粒粒径、结晶度及稳定性的影响。通过XRD和SEM分析技术对不同条件下制备的样品进... 详细信息

目的制备分散性好、粒径分布窄的稳定氧化锆纳米粉体。方法采用水热法制备氧化锆纳米粉体,考察水热时间、p H值、温度和有机添加剂丙三醇,对氧化锆粉体颗粒粒径、结晶度及稳定性的影响。通过XRD和SEM分析技术对不同条件下制备的样品进行表征。结果结晶度随着水热反应温度的升高而提高,形核速率在250℃时快速增加,粒径在150~250℃出现先长大后减小的规律。反应溶液的p H值影响样品的结晶度,通过调节溶液p H值可以减小粉体颗粒之间的团聚,改善粉体的分散性。水热反应进程越充分,样品的平均粒径越大。加丙三醇后,在反应条件为200℃、p H=10、t=12 h时制备钇掺杂量3%的氧化锆粉体,于1000℃煅烧12 h,得到分散性好、粒径分布窄的单立方相纳米氧化锆粉体颗粒。结论通过设定水热法反应温度、p H值、时间,可以制备粒径可控的稳定氧化锆纳米粉体,且钇掺杂可有效提高氧化锆的稳定性。加入丙三醇可以有效地改善粉体的分散性和稳定性,煅烧稳定氧化锆纳米粉体可以有效减小粉体粒径分布和提高粉体的结晶度。

关键词：氧化锆水热法纳米粉体粒径结晶度稳定性

Sequence-activated chemiluminescence probes: programmable illumination for high-contrast in vivo sensing and imaging

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Science China Chemistry 2025年第01期 26-34页

作者： Yutao zhang Juan Li Wei-hong Zhu Zhiqian Guo Shanghai Key Laboratory of Functional Materials Chemistry Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology State Key Laboratory of Bioreactor Engineering Shanghai Frontier Science Research Base of Optogenetic Techniques for Cell MetabolismEast China University of Science & Technology

Sequence-activated chemiluminescence(CL) technique offers a unique approach to detecting specific biomolecules or cellular events with high sensitivity and spatial resolution. The fundamental principle behind sequence-activated CL probes involves tailoring highly-controllable CL signals in response to specific sequences or events of interest, thus enabling high-contrast signals under complex physiological conditions. This sequential activation could be triggered by enzymes, reactive oxygen species(ROS), biothiols or changes in the microenvironment. These unique sequence-activated CL probes bestow several advantages, including minimal background, deep-tissue penetration, and the ability of non-invasive or minimally invasive detection. The sequence-activated CL techniques represent a significant advancement in molecular imaging and diagnostics. In this mini-review, we focus on the latest developments in sequential CL probes, addressing the technical challenges and discussing the future trajectory by harnessing CL signaling and molecular recognition.

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