检索结果-南通市图书馆

High-purity Mg and Mg-1Ca alloys:Comparative assessment of the merits regarding degradation,osteogenesis,and biosafety for orthopedic applications

引用

Journal of Materials Science & Technology 2023年第9期140卷 58-66页

作者： Baiyan sui hua Lu Xin Liu Jiao Sun Department of Dental Materials Shanghai Biomaterials Research and Testing CenterShanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineCollege of StomatologyShanghai Jiao Tong UniversityNational Center for StomatologyNational Clinical Research Center for Oral DiseasesShanghai Key Laboratory of StomatologyShanghai 200011China

High-purity magnesium(HP Mg)and Mg-1Ca,as representations of Mg-matrix implants produced by purifying and alloying,are employed in biomedical applications primarily because of their bioactivity and degradability.The superiority of both degradation properties,the match between degradation and osteo-genesis in vivo,and biosafety are critical problems that will decide future purifying or alloying to construct Mg-based implants and promote clinical translation.The present study investigated the benefits and limitations of degradation behavior and biosafety of HP Mg and Mg-1Ca according to the electro-chemical experiment,hydrogen evolution test,immersion test,and in vivo bone implantation assay.The results indicated that due to its Mg 2 Ca phase,Mg-1Ca exhibited a considerably higher corrosion current density and hydrogen production than HP Mg in vitro.Furthermore,HP Mg and Mg-1Ca display a favorable match between their degradation and the surrounding osteogenesis,resulting in no significant variation in degradation in vivo during 26 weeks.Additionally,the implantation and degradation of HP Mg and Mg-1Ca do not result in major organ dysfunction or pathological abnormalities.This work is expected to lay the foundation for future clinical translation of Mg and Mg alloy orthopedic implants.

关键词： High-purity magnesium Mg-1Ca Microstructure Degradation in vitro and vivo Biosafety

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of solution treatment on microstructure and mechanical properties of as-cast Al-12Si-4Cu-2Ni-0.8Mg-0.2Gd alloy

引用

China Foundry 2022年第3期19卷 238-244页

作者： Yu-dong sui Ye-hua Jiang Qu-dong Wang School of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China National Engineering Research Center of Light Alloys Net Forming and State Key Laboratory of Metal Matrix Composite Shanghai Jiao Tong UniversityShanghai 200240China

Effect of solution treatment on microstructure and mechanical properties of Al-12Si-4Cu-2Ni-0.8Mg-0.2Gd alloy was investigated.Results show the Si particles become stable and more intermetallic compounds dissolve in the matrix after solution treatment at 500℃for 2 h followed by 540℃for 3 h(T4).The skeleton-like Al_(3)CuNi develops into two parts in the T4 alloy:one is Al_(3)CuNi which has the framework shape;the other is intermetallics including the Al_(3)CuNi(size:5-10μm)and AlSiCuNiGd phases(size:≤5μm)with complex structure.Adding 0.2%Gd can improve the mechanical properties of the alloys after two-step solution treatment(500℃/2 h followed by 540℃/3 h),the hardness of the alloy increases from 130.9 HV to 135.8 HV compared with the alloy with one-step solution treatment(500℃/2 h),the engineering strength increases from 335.45 MPa to 352.03 MPa and the fracture engineering strain increases from 1.44%to 1.67%.

关键词： Al-Si-Cu-Ni-Mg alloy Gd element solution treatment microstructure mechanical properties

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Transarterial chemoembolization plus stent placement for hepatocellular carcinoma with main portal vein tumor thrombosis:A meta-analysis

引用

World Journal of Clinical Oncology 2024年第3期15卷 447-455页

作者： Wei-Fan sui Jian-Yun Li Jian-hua Fu Department of Interventional Radiology Zhenjiang First People's HospitalZhenjiang 212000Jiangsu ProvinceChina

BACKGROUND Portal vein tumor thrombus is an important indicator of poor prognosis in patients with hepatocellular carcinoma.Transarterial chemoembolization is recommended as the standard first-line therapy for unresectable hepatocellular carcinoma.Portal vein stent placement is a safe and effective therapy for promptly restoring flow and relieving portal hypertension caused by tumor thrombus.AIM To assess the clinical significance of transarterial chemoembolization plus stent placement for the treatment of hepatocellular carcinoma with main portal vein tumor thrombosis.METHODS We searched English and Chinese databases,assessed the quality of the included studies,analyzed the characteristic data,tested heterogeneity,explored heterogeneity,and tested publication bias.RESULTS In total,eight clinical controlled trials were included.The results showed that the pressure in the main portal vein after stent placement was significantly lower than that with no stent placement.The cumulative stent patency and survival rates at 6 and 12 months were lower in the transarterial chemoembolization+stent placement group than in the transarterial chemoembolization+stent placement+brachytherapy/radiotherapy group.The survival rates of patients treated with transarterial chemoembolization+stent placement for 6 and 12 months were higher than those of patients treated with transarterial chemoembolization alone.CONCLUSION For Chinese patients with hepatocellular carcinoma with main portal vein tumor thrombosis,transarterial chemoembolization plus stenting is effective.Transarterial chemoembolization+stent placement is more effective than transarterial chemoembolization alone.Transarterial chemoembolization+stent placement+brachytherapy/radiotherapy is more effective than transarterial chemoembolization+stenting.

关键词： Hepatocellular carcinoma Transarterial chemoembolization Portal vein tumor thrombus Stent Meta-analysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Comparison of microstructure, mechanical and wear behaviour of laser cladded stainless steel 410 substrate using stainless steel 420 and Colmonoy 5 particles

引用

Journal of Iron and Steel Research(International) 2020年第12期27卷 1446-1455页

作者： N.Jeyaprakash Che-hua Yang KRRamkumar Guang-zhou sui Additive Manufacturing Center for Mass CustomizationProduction National Taipei University of TechnologyTaipei 10608TaiwanChina Institute of Manufacturing Technology National TaipeiUniversity of TechnologyTaipei 10608TaiwanChina Department of Metallurgical and Materials Engineering Indian Institute of Technology MadrasChennai 600036India Graduate Institute of Mechanical and Electrical Engineering National Taipei University of TechnologyTaipei 10608TaiwanChina

Stainless steel (SS) 410 is widely used in many components of nuclear reactors due to its good corrosion resistance and high strength. However, wear is a major issue of these components due to its continuous sliding. SS 420 and Colmonoy 5 particles were deposited over SS 410 substrate by laser cladding process. Then, X-ray diffraction was used to find the phases present after cladding process. Further, coating morphologies were analysed by scanning electron microscopy (SEM) twinned with energy-dispersive spectroscopy. The obtained morphology indicates the hard laves phase present in the Colmonoy 5 cladding surface and needle-like structure in SS 420 cladding surface. Then, Vickers microhardness test was carried out in order to study the hardness and load-carrying capacity of the cladding specimen. Among those, Colmonoy 5 cladding specimen provide higher hardness due to the presence of laves phase formation. Then, the dry sliding wear study was conducted to calculate the mass loss after 2500 m of sliding. The combined effect of hardness and laves phase formation were reflected in dry sliding wear study analysis of the specimens. Then, to study the wear mechanism and roughness, worn surface morphologies were captured using SEM and white light interferometer, respectively.

关键词： Stainless steel(SS)410 Stainless steel(SS)420 Colmonoy 5 Laser cladding Laves phase Wear behaviour Mechanism Roughness

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Application and exploration of nanofibrous strategy in electrode design

引用

Journal of Materials Science & Technology 2021年第15期74卷 189-202页

作者： Yongliang Li hua Yuan Yanbing Chen Xiaoyu Wei Kunyan sui Yeqiang Tan State Key Laboratory of Bio-Fibers and Eco-Textiles Ef Institute of Marine Biobased Materials&Collage of Materials Science and Engineering Qingdao UniversityQingdao 266071China

The key to develop high specific energy rechargeable batteries is development of new electrode materials.The existing electrode materials still have many problems:the shuttle effect and poor conductivity of the sulfur cathode,the inevitable volume expansion of the silicon anode and the lithium dendrite of the lithium metal anode that cause short circuits,etc.Nanofibers,as active electrical materials,conductive additives and electrode bodies,can play multiple roles in electrode design.More interestingly,nanofibers can be functionalized to obtain better controllable properties(i.e.,electrolyte affinity,pore size distribution and surface electronic structure),thereby further enhancing electrochemical performance.In this article,the latest research progress in electrode design based on nanofibers is reviewed,including processing methods,structure,morphology and electrochemical performance.The key problems affecting the electrochemical performance of the electrode are also discussed,such as the preparation process,atomic structure,electrical conductivity,surface area and pore distribution of nanofibers,to provide reference points for nanofibers in excellent electrode design.

关键词： Nanofibers Battery Electrode Energy storage

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Safety and efficacy of transcatheter arterial embolization in autosomal dominant polycystic kidney patients with gross hematuria: Six case reports

引用

World Journal of Clinical Cases 2024年第11期12卷 1954-1959页

作者： Wei-Fan sui Yun-Xin Duan Jian-Yun Li Wei-Bin Shao Jian-hua Fu Department of Interventional Radiology Zhenjiang First People's HospitalZhenjiang 212000Jiangsu ProvinceChina Department of Nephrology Zhenjiang First People’s HospitalZhenjiang 212000Jiangsu ProvinceChina

BACKGROUND To retrospectively report the safety and efficacy of renal transcatheter arterial embolization for treating autosomal dominant polycystic kidney disease(ADPKD)patients with gross hematuria.CASE SUMMARY The purpose of this study is to retrospectively report the safety and efficacy of renal transcatheter arterial embolization for treating ADPKD patients with gross hematuria.Materials and methods:During the period from January 2018 to December 2019,renal transcatheter arterial embolization was carried out on 6 patients with polycystic kidneys and gross hematuria.Renal arteriography was performed first,and then we determined the location of the hemorrhage and performed embolization under digital subtraction angiography monitoring.Improvements in routine blood test results,routine urine test results,urine color and postoperative reactions were observed and analyzed.Results:Renal transcatheter arterial embolization was successfully conducted in 6 patients.The indices of 5 patients and the color of gross hematuria improved after surgery compared with before surgery.No severe complication reactions occurred.CONCLUSION For autosomal dominant polycystic kidney syndrome patients with gross hematuria,transcatheter arterial embolization was safe and effective.

关键词： Renal artery Autosomal dominant polycystic kidney disease Gross hematuria Interventional radiology Embolization Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Correlation analysis of combined and separated effects of wing deformation and support system in the CAE-AVM study

引用

Chinese Journal of Aeronautics 2018年第3期31卷 429-438页

作者： Min ZHONG sui ZHENG Ganglin WANG Jun hua Roy GEBBINK Chinese Aeronautical Establishment Beoing 100012 China German-Dutch Wind Tunnels Marknesse 8316 PR The Netherlands

The Chinese Aeronautical Establishment（CAE） Aerodynamic Validation Model（AVM）is a dual-purpose test geometry dedicated to verify the aerodynamic performance of a conceptual intercontinental jet aircraft and to provide a dataset for CFD software validation. To this end, a scaled model of the AVM was tested in the High-Speed Tunnel（HST） of the German-Dutch Wind-tunnels（DNW） with special test consideration and instrumentation. For complementary analysis of experimental results, specific CAE-AVM geometries are analyzed using a CAE inhouse CFD code. The specific geometries consist of a baseline aircraft, an aircraft with a deformed wing shape, and an aircraft with both a deformed wing shape and a representation of the model support system used in the wind tunnel. Detailed analysis of numerical and experimental results is presented; both the combined and individual attributions of wing deformation and support system interference on wing pressure distributions and longitudinal aerodynamic characteristics are summarized.

关键词： Aerodynamic validation model CFD CFD-Wind tunnel data correlation Support interference Wing deformation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Recovery of titania from high titanium slag by roasting method using concentrated sulfuric acid

引用

Rare Metals 2015年第12期34卷 895-900页

作者： Li-Li sui Yu-Chun Zhai Li-hua Miao Department of Chemistry Shenyang Medical College School of Materials and Metallurgy Northeastern University

By means of energy-dispersive X-ray spectroscopy (EDX) and scanning electron microscope (SEM) analysis, the phase structure characteristics of high titanium slag were analyzed. Through the single factor and the orthogonal experiment methods, the effects of material particle size, mass ratio of acid to ore, roasting temperature, and roasting time on the acidolysis ratio of TiO2 during the process of roasting high titanium slag with concentrated sulfuric acid were systematically investigated. The results show that the sequence of each factor affecting the acidolysis ratio of TiO2 is: mass ratio of acid to ore, roasting time, and roasting temperature. The optimum technological conditions are obtained as mass ratio of acid to ore of 2.1, roasting temperature of 310°C, roasting time of 75min, and material particle size of 45–53μm. The acidolysis ratio of TiO2 is over 96% under the optimum conditions. The roasting process is proved to be significant in the exploitation and utilization of high titanium slag. The advantages of the proposed roasting process are of high efficiency, low power consumption, and minimum pollution.

关键词： Concentrated sulfuric acid Roasting High titanium slag Titania

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Wide emission shifts and high quantum yields of solvatochromic carbon dots with rich pyrrolic nitrogen

引用

Nano Research 2020年第9期13卷 2492-2499页

作者： hua Wang Philip Haydel Ning sui Lina Wang Yan Liang William W.Yu Departm ent of Chem istry and Physics Louisiana State UniversityShreveportLA 71115USA College of M aterials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Food Science and Engineering Qilu University of Technology(Shandong A cadem y of Sciences)Jinan 250353China

Carbon dots(CDs)with solvatochromic emission colors in different solvents have attracted much attention as a new class of luminescent nanomaterial owing to their facile synthesis and low production cost.In this work,we prepared two kinds of CDs with solvatochromic emissions:green emission CDs(G-CDs)and multicolor emission CDs(M-CDs).G-CDs synthesized from o-phenylenediamine exhibited weak photoluminescence emission(quantum yield 2.8%-6.1%)and 39 nm solvatochromic shifts(492-531 nm).In contrast,M-CDs prepared from o-phenylenediamine and 4-aminophenol showed 87 nm solvatochromic shift range(505-592 nm)and much higher photoluminescence quantum yield(18.4%-32.5%).The two CDs exhibited different emission,absorption,and photoluminescence lifetime.The origin of solvatochromic shifts and the formation mechanism of CDs were demonstrated by analyzing the structures and compositions of two CDs.High percentages of pyrrolic nitrogen and amino nitrogen make wider solvatochromic shifts and higher quantum yields.The results were well supported by density functional theory calculations.This effective strategy to expand solvatochromic shift range and improve quantum yields could open a new window to prepare satisfied solvatochromic carbon dots.

关键词： carbon dot solvatochromism density functional theory(DFT)calculation quantum yield pyrrolic nitrogen

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

黄海湿地遗产区周边农户生计恢复力评价及优化路径

引用

生态与农村环境学报 2023年第11期39卷 1421-1429页

作者：马随随李传武张华兵西北大学城市与环境学院陕西西安710127 盐城师范学院城市与规划学院江苏盐城224007 盐城师范学院苏北农业农村现代化研究院江苏盐城224007

黄海湿地遗产区是我国第一个滨海湿地类自然遗产,随着湿地生境保护成为发展重心,遗产区周边的农户生计面临诸多挑战,提升农户生计恢复力,对实现湿地保护与周边社区协同发展具有重要意义。以黄海湿地遗产区周边乡村为案例地,从缓冲能力... 详细信息

黄海湿地遗产区是我国第一个滨海湿地类自然遗产,随着湿地生境保护成为发展重心,遗产区周边的农户生计面临诸多挑战,提升农户生计恢复力,对实现湿地保护与周边社区协同发展具有重要意义。以黄海湿地遗产区周边乡村为案例地,从缓冲能力、自组织能力和学习能力3个维度构建农户生计恢复力评价指标体系,借助障碍度模型识别其关键影响因子,并据此提出农户生计恢复力优化路径。结果表明:(1)黄海湿地遗产区周边乡村的农户生计恢复力整体偏低,其中缓冲能力最高,自组织能力和学习能力均较低,不同类型农户间生计恢复力差异显著;(2)住房条件、公共服务覆盖度、人均农业用地面积、家庭生计类型总数、金融支持度和风险感知能力是不同类型农户生计恢复力的共同影响因子;(3)应当按照“分类优化、多业协同、政策扶持、农户自觉”的思路系统构建农户生计恢复力提升路径。研究结果可以为深化黄海湿地遗产区人与自然和谐共生以及乡村高质量发展提供决策参考。

关键词：农民生计恢复力影响因子优化路径黄海湿地遗产区

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：