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解读新时代档案价值实现的一部力作——评《基于价值全面实现的档案信息资源配置》

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档案 2024年第6期 60-65页

作者：陈闽芳王彩虹广州市档案发展中心广东广州510006

《基于价值全面实现的档案信息资源配置》是一部深入解读新时代档案价值实现多元途径的匠心之作。从研究取向、研究方法、研究过程三方面评析其著作特色,该书开拓多元路径,推动档案信息资源价值实现、汲取他学之长,引领档案学科领域发... 详细信息

《基于价值全面实现的档案信息资源配置》是一部深入解读新时代档案价值实现多元途径的匠心之作。从研究取向、研究方法、研究过程三方面评析其著作特色,该书开拓多元路径,推动档案信息资源价值实现、汲取他学之长,引领档案学科领域发展潮流、扎根现实土壤,探索档案信息资源优化配置,对创新档案价值基础理论与指导档案管理实践颇具意义。

关键词：档案价值档案信息资源配置书评

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海洋大气环境下镁合金腐蚀行为研究进展

稀有金属材料与工程 2024年第4期53卷 1170-1180页

作者：周慧敏黄须强孔令菲陈建鑫高飞刘绍红陈民芳张晋铁镝东北大学材料科学与工程学院辽宁沈阳110819 天津理工大学材料科学与工程学院天津300384 大连交通大学连续挤压教育部工程研究中心辽宁大连116028

本文综合研究了海洋大气环境下镁合金腐蚀行为的研究进展,比较分析了各种因素对腐蚀行为的影响,对当前研究进展进行总结并对未来研究方向进行展望。在海洋大气环境下,表面薄电解质溶液膜的包覆是镁合金发生电化学腐蚀的主要原因,且多发... 详细信息

本文综合研究了海洋大气环境下镁合金腐蚀行为的研究进展,比较分析了各种因素对腐蚀行为的影响,对当前研究进展进行总结并对未来研究方向进行展望。在海洋大气环境下,表面薄电解质溶液膜的包覆是镁合金发生电化学腐蚀的主要原因,且多发生局部腐蚀。相比于内陆大气环境,海洋大气中含有较多无机盐气溶胶颗粒,导致点蚀成为主要的局部腐蚀形式。相对湿度的升高会导致薄电解质膜厚度增加,进而加速整体腐蚀速率。随气温上升,镁合金的大气腐蚀速率线性增加,而空气中的CO_(2)可以抑制NaCl对镁合金的侵蚀。该领域未来需更多关注具体使役环境下合金的腐蚀机理,以及各种环境因素对腐蚀行为的协同作用机制,以指导海洋用镁合金材料的设计和制备。

关键词：镁合金海洋环境腐蚀大气腐蚀局部腐蚀

In vivo degradability and biocompatibility of a rheo-formed Mg–Zn–Sr alloy for ureteral implantation

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Journal of Magnesium and Alloys 2022年第6期10卷 1631-1639页

作者： Di Tie Renguo Guan Huinan Liu minfang chen Sviatlana A.Ulasevich Ekaterina V.Skorb Patricia Holt-Torres Xiaopeng Lu Norbert Hort Engineering Research Center of Continuous Extrusion Ministry of EducationDalian Jiaotong UniversityDalian 116028China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China Department of Bioengineering University of CaliforniaRiversideCA 92521USA School of Materials Science and Engineering Tianjin University of TechnologyTianjin 300384China Infochemistry Scientific Center ITMO UniversitySt.Petersburg 192007Russia Magnesium Innovation Center-MAGIC Helmholtz Zentrum GeesthachtGeesthacht D-21502Germany

The introduction of biodegradable implant materials has significantly improved the postoperative subjective feelings of patients within the past few decades,among which magnesium alloy is widely considered a favorable choice as its appropriate biodegradability and evident antibacterial ***,we reveal a semisolid rheo-formed Mg–Zn–Sr alloy ureteral implant that displayed suitable degradability and biocompatibility in a pig *** non-dendritic microstructure was observed in the rheo-formed alloy,which led to ca.47%increase in ultimate tensile strength(from 195.0 MPa to 288.1 MPa)and more homogeneous degradation process compared with the untreated *** post-interventional inflammation or pathological changes of the test animals were observed during the implantation period,and the corrosion rate(0.22±0.04 mm·y^(-1))perfectly fitted the clinical ureteral stent indwelling *** urine bacteria numbers decreased from 88±13 CFU·mL^(-1)at 7 weeks post operation to 59±8 CFU·mL^(-1)at 14 weeks post operation,which confirmed the evident antibacterial activity of the *** study demonstrates that the Mg–Zn–Sr alloy is clinically safe for urinary system,enabling its efficacious use as ureteral implant materials.

关键词： In vivo Biodegradability Biocompatibility Mg–Zn–Sr alloy Ureteral implant

Effects of grain size on the corrosion resistance of pure magnesium by cooling rate-controlled solidification

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Frontiers of Materials Science 2015年第3期9卷 247-253页

作者： Yichi LIU Debao LIU then YOU minfang chen School of Materials Science and Engineering Tianjin University of Technology Tianjin 300384 China

The aim of this study was to investigate the effect of grain size on the corrosion resistance of pure magnesium developed for biomedical applications. High- purity magnesium samples with different grain size were prepared by the cooling rate- controlled solidification, Electrochemical and immersion tests were employed to measure the corrosion resistance of pure magnesium with different grain size. The electrochemical polarization curves indicated that the corrosion susceptibility increased as the grain size decrease. However, the electrochemical impedance spectroscopy （EIS） and immersion tests indicated that the corrosion resistance of pure magnesium is improved as the grain size decreases. The improvement in the corrosion resistance is attributed to refine grain can produce more uniform and density film on the surface of sample.

关键词： pure magnesium solidification cooling rate grain size corrosion resistance

In vivo urinary compatibility of Mg-Sr-Ag alloy in swine model

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Bioactive Materials 2022年第1期7卷 254-262页

作者： Di Tie Norbert Hort minfang chen Renguo Guan Sviatlana Ulasevich Ekaterina V.Skorb Dapeng Zhao Yili Liu Patricia Holt-Torres Huinan Liu Engineering Research Center of Continuous Extrusion Ministry of EducationDalian Jiaotong UniversityDalian116028China Magnesium Innovation Center Helmholtz-Zentrum GeesthachtD-21502GeesthachtGermany School of Materials Science and Engineering Tianjin University of TechnologyTianjin300384China Infochemistry Scientific Center ITMO UniversitySt.Petersburg192007Russia College of Biology Hunan University410082ChangshaChina Department of Urology China Medical UniversityShenyang110084China Department of Bioengineering Bourns College of EngineeringUniversity of California at RiversideCA92521USA

A biodegradable metallic ureteral stent with suitable mechanical properties and antibacterial activity remains a *** we reveal the scientific significance of a biodegradable Mg-Sr-Ag alloy with a favorable combination of balanced mechanical properties,adjustable indwelling time in urinary tract and evident antibacterial activity via in vivo experiments in a swine *** to the rheo-solidification process,equiaxial microstructure and significantly refined grains(average grain size:27.1μm)were ***17Sr2 and Mg4Ag were found as the primary precipitates in the matrix,due to which the alloy obtained ca.111%increase in ultimate tensile strength in comparison to pure *** the in vitro and in vivo results demonstrated the satisfactory biocompatibility of the *** evaluation and bioindicators analysis suggested that there was no tissue damage,inflammation and lesions in the urinary system caused by the degradation *** stent also improved the post-operative bladder functions viewed from the urodynamic *** findings highlight the potential of this alloy as antibacterial biodegradable urinary implant material.

关键词： In vivo Magnesium alloy Biodegradable metals Mechanical properties Urinary compatibility

Effects of solidification cooling rate on the corrosion resistance of Mg–Zn–Ca alloy

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Progress in Natural Science:Materials International 2014年第3期24卷 452-457页

作者： Debao Liu Yichi Liu Yan Huang Rong Song minfang chen School of Materials Science and Engineering Tianjin University of Technology BCAST Brunel University

This study was carried out to investigate the effect of solidification cooling rate on the corrosion resistance of an Mg–Zn–Ca alloy developed for biomedical applications. A wedge shaped copper mould was used to obtain different solidification cooling rates. Electrochemical and immersion tests were employed to measure the corrosion resistance of Mg–Zn–Ca alloy. It was found that increasing cooling rate resulted in a significant improvement in the corrosion resistance of the Mg–Zn–Ca alloy. The findings were explained in terms of solidification behaviour in association with the change in solubility of the alloying elements, microstructural homogeneity and refinement and chemical homogeneity as well as the increased cooling rates.

关键词： Mg–Zn–Ca alloy Solidification cooling rate Microstructure Corrosion resistance

Engineering crystal phase of polytypic CuInS2 nanosheets for enhanced photocatalytic and photoelectrochemical performance

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Nano Research 2020年第2期13卷 583-590页

作者： He Li Wenjiang Li Wei Li minfang chen Rony Snyders Carla Bittencourt Zhihao Yuan Key Iaboratory of Display Materials C Photoelectric Devices School of Materials Science and Engineering Tianjin University of TechnologyTianjin 300384China Chimie des Interactions Plasma-Surface University of Mons(UMONS)20 Place du Parc7000 MonsBelgium Materia Nova Research Centre 1 Avenue Nicolas CopernicB 7000 MonsBelgium

Crystal phase engineering on CulnS2(CIS)nanocrystals,especially polytypic structure,has become one of the research hotspots to design the advanced materials and devices for energy conversion and environment ***,the polytypic CIS nanosheets(NSs)including zincblende/wutzite and chalcopyrite/wurtzite types were first time achieved in a hot-injection system using oleic acid and liquid paraffin as the reaction ***-obtained polytypic CIS NSs exhibit significantly enhanced light-absorption abillty and visible-light-driven photocatalytic performance originating from the rational hetero-crystalline interfaces and surface defect states,which efficiently inhibit the recombination of photo-generated ***,the polytypic CIS NSs were spin-coated onto the surface of fluorinated-tin oxide glass substrate and used as the photoelectrode,which shows an excellent photoelectrochemical(PEC)activity in aqueous *** present work not only provides a facile,rapid,low-cost,and environmental-friendly synthesis strategy to design the crystal phase and defect structure of ternary chalcogenides,but also demonstrates the relationships between the polytypic structure and photocatalytic/photoelectrochemical properties.

关键词： CuInS2 polytypic defect hot injection photocatalytic photoelectrochemical activity

In vitro and in vivo biocompatibility of Mg–Zn–Ca alloy operative clip

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Bioactive Materials 2019年第1期4卷 236-244页

作者： Pengfei Ding Yuanchao Liu Xianghui He Debao Liu minfang chen School of Materials Science and Engineering Tianjin University of TechnologyTianjin300384China Tianjin Medical University General Hospital Department of General SurgeryTianjin300384300070China National Demonstration Center for Experimental Function Materials Education Tianjin University of TechnologyTianjin300384China Tianjin Key Laboratory for Photoelectric Materials and Devices Tianjin300384China

At present,titanium(Ti)and its alloys are most commonly use in hemostasis clip clinical ***,the Ti Clip cannot be absorbed in human body and produce artifacts on computed tomography(CT),and induce clinically relevant hypersensitivity in *** order to overcome the drawbacks of the non-degradable Ti clips,an Mg-Zn-Ca alloy operative clip was fabricated by combining hot extrusion and blanking *** vitro and in vivo biocompatibility of Mg-Zn-Ca alloy operative clip were evaluated by L-929 Cells and SD rat model *** was found that Mg-Zn-Ca alloy exhibited non-cytotoxic to L929 *** vivo implantation showed that the newly designed Mg-Zn-Ca clip can successfully ligated carotid artery and no blood leakage occurred *** the period of the clip degradation,a small amount of H2 gas formation and no tissue inflammation around the clips were *** degradation rate of the clip near the heart ligated the arteries faster than that of clip far away the heart due do the effect of arterial *** analysis and various blood biochemical parameters in rat serum samples collected at different times after clip implantation showed no tissue inflammation around the clips.

关键词： Mg-Zn-Ca alloy Biodegradable hemostatic clip In vitro and in vivo biocompatibility Carotid artery

Deposition of Bioactive Layer on NiTi Alloy by Chemical Treatment

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Journal of Materials Science & Technology 2002年第6期18卷 534-537页

作者： Ya LIU, Xianjin YANG, minfang chen, Shengli ZHU and Zhenduo GUISchool of Materials Science and Engineering, Tianjin University, Tianjin 300072, China Sch. of Mat. Sci. and Eng. Tianjin Univ. Tianjin 300072 China

A simple chemical method was developed for inducing bioactivity on NiTi alloys (50 at. pct by Ni/Ti). A layer of calcium phosphate was deposited on the surface to improve biocompatibility of the alloy. NiTi alloys were first etched in HNO3 aqueous solution, and then treated with boiling diluted NaOH solution. A rough surface was created and a thin TiO2 layer was formed on the surface. Pre-calcification was then introduced by immersing the treated NiTi alloys in supersaturated Na2HPO4 solution and supersaturated Ca(OH)2 solution in turn before calcification in simulated body fluid (SBF). A dense and uniform bonelike calcium phosphate (Ca-P) bioactive layer was formed on the surfaces of the specimen, which would improve their biocompatibility. Morphology and element analysis on NiTi surfaces during the treatments were investigated in detail by means of environment scanning electron microscopy (ESEM), energy dispersion X-ray spectroscopy (EDXS), and X-ray diffraction (XRD).

关键词： NiTi alloy Chemical method Bioactive layer Biocompatibility