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Microstructures, mechanical properties, corrosion, and biocompatibility of extruded Mg-Zr-Sr-Ho alloys for biodegradable implant applications

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Journal of Magnesium and Alloys 2023年第1期11卷 110-136页

作者： Faisal Kiani jixing Lin Alireza Vahid Khurram Munir Cuie Wen Yuncang Li School of Engineering RMIT UniversityMelbourneVictoria 3001Australia School and Hospital of Stomatology Wenzhou Medical UniversityWenzhou 325027China Institute for Frontier Materials Deakin UniversityGeelongVictoria 3217Australia

In this study,the microstructures,mechanical properties,corrosion behaviors,and biocompatibility of extruded magnesium-zirconiumstrontium-holmium(Mg-Zr-Sr-Ho)alloys were comprehensively *** effect of different concentrations of Ho on the microstructural characteristics,tensile and compressive properties,corrosion resistance,and biocompatibility were *** microstructures of the extruded Mg-1Zr-0.5Sr-xHo(x=0.5,1.5,and 4 wt.%)alloys consisted ofα-Mg matrix,fineα-Zr particles,and intermetallic phase particles of Mg_(17)Sr_(2) and Ho_(2)Mg mainly distributed at the grain ***{1012}tensile twins were observed in the partially recrystallized samples of Mg-1Zr-0.5Sr-0.5Ho and *** addition of Ho to 4 wt.%resulted in a complete recrystallization due to activation of the particle stimulated nucleation around the Mg_(17)Sr_(2) *** evolution of a rare earth(RE)texture was observed with the Ho addition,which resulted in the weakened basal and prismatic ***,a drastic increase of 200%in tensile elongation and 89%in compressive strain was observed with Ho addition increased from 0.5 to 4 wt%,*** tension-compression yield asymmetry was significantly decreased from 0.62 for Mg-1Zr-0.5Sr-0.5Ho to 0.98 for Mg-1Zr-0.5Sr-4Ho due to the weakening of *** analysis of the extruded Mg-Zr-Sr-Ho alloys revealed the presence of pitting corrosion.A minimum corrosion rate of 4.98 mm y^(−1) was observed in Mg-1Zr-0.5Sr-0.5Ho *** enhanced corrosion resistance is observed due to the presence of Ho_(2)O_(3) in the surface film which reduced galvanic *** formation of a stabilized surface film due to the Ho_(2)O_(3) was confirmed through the electrical impedance spectroscopy and XPS *** in vitro cytotoxicity assessment revealed good biocompatibility and cell adhesion in relation to SaOS2 cells.

关键词： Mg-Zr-Sr-Ho alloy Mechanical properties Corrosion Cytotoxicity EBSD Electrical impedance spectroscopy Potentiodynamic polarization

Development of Ti-26Nb-1.2TiC shape memory composite for biomedical applications

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Journal of Materials Science & Technology 2023年第22期153卷 128-138页

作者： Quanxiang Sun Dechuang Zhang Xian Tong Jianguo Lin jixing Lin Yuncang Li Cuie Wen School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China Key Laboratory of Low Dimensional Materials&Application Technology Xiangtan UniversityMinistry of EducationHunan 411105China Institute of Stomatology School and Hospital of StomatologyWenzhou Medical UniversityWenzhou 325027China School of Engineering RMIT UniversityMelbourneVictoria 3001Australia

Ti-Nb alloys have great potential in biomedical applications as bone-implant materials due to their low elastic modulus,superelasticity,high corrosion resistance,and good ***,the low yield strength and poor superelasticity of Ti-Nb alloys restrict their practical clinical ***,we report the mechanical properties and superelasticity,corrosion behavior,and biocompatibility of a Ti-26 at.%Nb-1.2 vol.%TiC(Ti-26Nb-1.2TiC)shape memory composite(SMC)prepared by vacuum arc melting and hot *** yield strength,critical stress for inducing martensitic transformation,and elongation of the Ti-26Nb-1.2TiC SMC and a Ti-26Nb alloy were 460 and 337 MPa,251 and 115 MPa,and 27.2%and 24.1%,*** recovery rate of the SMC under 4%pre-strain reached 91.4%,which was 1.2 times that of the *** tests in Hanks’solution revealed that the corrosion current density,passive current density,and corrosion rate of the SMC were lower than those of the *** the Ti-26Nb alloy and Ti-26Nb-1.2TiC SMC showed good cell viability with grade 0 cytotoxicity in relation to MG-63 osteosarcoma cells.

关键词： Corrosion resistance Cytotoxicity Mechanical properties Superelasticity Ti-Nb alloy Ti-Nb-TiC shape memory composite

机器人辅助手术系统和腹腔镜手术切除胆总管囊肿疗效的Meta分析

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中华消化外科杂志 2024年第2期23卷 289-296页

作者：郭恬汇胡启辉陈聪陶锐何津彤王继兴黄真豪重庆医科大学附属璧山医院全科医学重庆402760 重庆医科大学附属璧山医院肝胆外科重庆402760

胆总管囊肿是一种非常罕见的先天性胆管异常。早期进行囊肿切除术和肝空肠Roux‑en‑Y吻合术是外科治疗该病的首选方式。随着快速康复外科的发展,腹腔镜手术有效减少了胆道并发症及创口感染发生率等,但其仍未满足人们对手术微创的要求。... 详细信息

胆总管囊肿是一种非常罕见的先天性胆管异常。早期进行囊肿切除术和肝空肠Roux‑en‑Y吻合术是外科治疗该病的首选方式。随着快速康复外科的发展,腹腔镜手术有效减少了胆道并发症及创口感染发生率等,但其仍未满足人们对手术微创的要求。机器人手术系统因其清晰的手术视野及灵活的机械臂可以提高手术精准度及外科医师的操作性。笔者查阅国内外相关文献,采用Meta分析评价机器人手术系统与腹腔镜手术治疗胆总管囊肿的疗效。

关键词：胆总管囊肿腹腔镜检查机器人手术系统疗效 Meta分析

特拉敖包矿产地氧化还原过渡带磁异常特征及产生机理探讨

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铀矿地质 2024年第2期40卷 301-308页

作者：陈聪程纪星周俊杰吴国东核工业北京地质研究院中核集团铀资源勘查与评价技术重点实验室北京100029

鄂尔多斯盆地北缘是我国重要的砂岩型铀矿床基地,近几年地质勘查发现特拉敖包地区有很大的找矿潜力,定位氧化还原过渡带是圈定有利成矿地区的关键。前人针对砂岩型铀矿开展的磁法研究大多只是直接对矿床的磁异常进行简单分析,很少研究... 详细信息

鄂尔多斯盆地北缘是我国重要的砂岩型铀矿床基地,近几年地质勘查发现特拉敖包地区有很大的找矿潜力,定位氧化还原过渡带是圈定有利成矿地区的关键。前人针对砂岩型铀矿开展的磁法研究大多只是直接对矿床的磁异常进行简单分析,很少研究不同环境磁化率差异,也未考虑深部基底磁性的影响。文章统计了研究区不同砂体磁化率参数,计算了理论模型正演响应,并开展磁法测量,获得了磁异常特征并求取剩余磁异常,其结果与氧化还原过渡带位置,以及三价铁与二价铁比值有一定的对应关系。认为研究区氧化还原过渡带上方表现为微弱高异常特征,与传统层间氧化带型磁异常形态有区别,原因是后期油气还原作用使局部铁元素价态发生变化,引起局部磁异常升高。

关键词：磁异常正演计算砂岩型铀矿氧化还原过渡带特拉敖包矿产地

Thermal processing induced release and degradation of paralytic shellfish toxin from mussels Mytilus edulis

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Journal of Oceanology and Limnology 2022年第6期40卷 2267-2276页

作者： Chenfan DONG Haiyan WU jixing PENG Mengmeng GUO Yuxiu ZHAI Zhijun TAN College of Food Science and Technology Shanghai Ocean UniversityShanghai 201306China Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality Ministry of AgricultureYellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China Pilot National Laboratory for Marine Science and Technology(Qingdao) Qingdao 266237China Collaborative Innovation Center of Seafood Deep Processing Dalian Polytechnic UniversityDalian 116034China

Understanding the risk factors associated with shellfish consumption is a relevant public health concern because of the potential adverse ef fects of paralytic shellfish toxins(PSTs).This work aims to study the effects of the five most common heating treatments(steaming,boiling,frying,water-bath heating,and microwaving),for different processing times and temperature/power settings,on the content of PSTs in mussels(Mytilus edulis)collected in Qinhuangdao,*** toxin concentration,removal percentages,and toxin distribution in the cooking liquor and meat were *** five processing modes effectively accelerated toxin release into the cooking *** average percentage removal was 73.53%±16.50%from *** led to the most significant toxin degradation among the methods *** findings should facilitate risk assessment of PSTs in mussels.

关键词： processing mode mussels removal percentage toxin distribution

The first N-ligand assisted Pd catalyzed asymmetric synthesis of 3-arylsuccinimides as novel antifungal leads

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Organic Chemistry Frontiers 2022年第1期9卷 183-189页

作者： jixing Lai Juan Yang Chen Yang RenéCsuk Baoan Song Shengkun Li Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou UniversityHuaxi DistrictGuiyang 550025China Organic Chemistry Martin-Luther-University Halle-WittenbergKurt-Mothes-Str.2D-06120 Halle(Saale)Germany

The first palladium/chiral nitrogenous ligand-catalyzed enantioselective addition of aryl boronic acids to various maleimides was *** protocol features mild conditions combined with good functional group *** resultant 3-arylsuccinimides were shown to be novel chiral antifungal leads and inspired the discovery of novel ligands to address the challenging issues of this transformation.

关键词： catalyzed chiral palladium

Block Copolymer Solid Electrolytes Based on Comb-Like Poly(ethylene glycol)Plasticized Poly(ionic liquid)s for Lithium-Ion Batteries

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Chinese Journal of Chemistry 2023年第19期41卷 2493-2501页

作者： Runtao Zhao jixing Yang Bin Wang Zhe Ma Li Pan Yuesheng Li School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin300072 China

Electrolytes based on poly(ionic liquid)s(PILs)have attracted great attention in the fields of next-generation solid lithium-ion ***,the low ionic conductivity prevents their practical ***,we report novel solid electrolytes based on block copolymers composed of PILs and comb-like poly(ethylene glycol)(PEG),which were synthesized via ring-opening metathesis polymerization of 3-(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-1-butyl-1H-imidazol-3-ium bis((trifluoromethyl)sulfonyl)amide and poly(ethylene glycol monomethyl ether)bicyclo[2.2.1]***-like PEG acts as plasticizers in block copolymers dominated by PILs to promote the mobility of PILs *** of the copolymer composition and length of the comb-like PEG chain on ionic conductivity were *** optimized electrolyte delivers the highest ionic conductivity of 1.5×10^(–5)S·cm^(–1)at 30℃,and robust electrochemical stability up to 4.6 V.A solid-state Li/LiFePO4 cell using the optimized electrolyte demonstrates good cycle performance at 0.2 C with high capacity retention of 92%after 70 cycles at 50℃.

关键词： Solid polymer electrolytes Li-ion batteries Polymerized ionic liquids Poly(ethylene glycol) Block copolymers Electrostatic interactions

Experimental and Numerical Analysis of the Influence ofMicrochannel Size and Structure on Boiling Heat Transfer

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Computer Modeling in Engineering & Sciences 2023年第9期136卷 3061-3082页

作者： Ningbo Guo Xianming Gao Duanling Li jixing Zhang Penghui Yin Mengyi Hua School of Mechanical and Electrical Engineering Shaanxi University of Science and TechnologyXi’an710021China

Computational fluid dynamics was used and a numerical simulation analysis of boiling heat transfer in microchannels with three depths and three cross-sectional profiles was *** heat transfer coefficient and bubble generation process of three microchannel structures with a width of 80μm and a depth of 40,60,and 80μm were compared during the boiling process,and the factors influencing bubble generation were studied.A visual test bench was built,and test substrates of different sizes were prepared using a micro-nano *** the test,the behavior characteristics of the bubbles on the boiling surface and the temperature change of the heated wall were collected with a high-speed camera and a temperature *** was found that the microchannel with a depth of 80μm had the largest heat transfer coefficient and shortest bubble growth period,the rectangular channel had a larger peak heat transfer coefficient and a lower frequency of bubble occurrence,while the V-shaped channel had the shortest growth period,i.e.,the highest frequency of bubble occurrence,but its heat transfer coefficient was smaller than that of the rectangular channel.

关键词： Microchannel boiling heat transfer bubble numerical simulation visual experiment

茶多酚、鱼骨粉复合制剂对福瑞鲤生长性能、消化及抗氧化能力的影响

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饲料工业 2024年第4期45卷 44-50页

作者：杨梓欣邓泳妍张文琦孔晴邹记兴吕利群唐汇娟华南农业大学海洋学院广东广州510640 上海海洋大学国家水生动物病原库上海201306 上海海洋大学水产科学国家级实验教学示范中心上海201306

研究以福瑞鲤(Cyprinus carpio FFRC)幼鱼为研究对象,研究茶多酚、鱼骨粉制成的复合制剂(商品名“血停”)对福瑞鲤生长、体成分、抗氧化性能以及消化器官组织结构的影响。研究选取180尾健康、大小[(1.92±0.01)g]均匀的福瑞鲤,随机分为... 详细信息

研究以福瑞鲤(Cyprinus carpio FFRC)幼鱼为研究对象,研究茶多酚、鱼骨粉制成的复合制剂(商品名“血停”)对福瑞鲤生长、体成分、抗氧化性能以及消化器官组织结构的影响。研究选取180尾健康、大小[(1.92±0.01)g]均匀的福瑞鲤,随机分为对照组和试验组,每组3个重复,对照组投喂商品饲料,试验组在商品饲料的基础上添加0.8%的复合制剂,在循环水系统下养殖8周。结果表明,添加复合制剂对福瑞鲤的生长、形体指标、体成分以及血清生化指标均无影响(P>0.05),但能显著提高福瑞鲤肠道脂肪酶活性以及肝脏和血清的过氧化氢酶(CAT)活性(P0.05);试验组福瑞鲤的肠道肌层厚度、绒毛高度显著低于对照组,绒毛宽度显著高于对照组(P0.05)。上述结果表明,该复合制剂对福瑞鲤的生长性能没有负面影响,可提高福瑞鲤的消化、抗氧化能力,可作为一种潜在的饲料添加剂。

关键词：福瑞鲤茶多酚鱼骨粉复合制剂生长抗氧化