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Corrosion and biocompatibility improvement of magnesium-based alloys as bone implant materials:a review

Regenerative Biomaterials 2017年第2期4卷 129-137页

作者： long Li ming zhang Ye Li Jie Zhao Ling Qin Yuxiao Lai Translational Medicine R&D Center Institute of Biomedical and Health EngineeringShenzhen Institutes of Advanced TechnologyChinese Academy of Sciences1068 Xueyuan AvenueShenzhen University TownShenzhen 518055China Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences1068 Xueyuan AvenueShenzhen University TownShenzhen 518055China Material Engineering Invention Examination Department State Intellectual Property OfficeNo.6 Xitucheng Road Haidian DistrictBeijing 100088China Musculoskeletal Research Laboratory Department of Orthopedics and TraumatologyThe Chinese University of Hong KongShatinNTHong Kong SARChina Key Laboratory of Molecular Engineering of Polymers Fudan University220 Handan RoadYangpu DistrictShanghai 200433China.

Magnesium(Mg)or its alloys are widely tested as potential orthopedic implants,particularly as biodegradable alloys for fracture fixation due to their mechanical properties are close to those of ***,available Mg or its alloys are confronted with challenges in passing regulatory biosafety tests prior to clinical trials due to its fast degradation and associated degradation *** degradation of Mg is accompanied by the release of Mg ions,the rise of pH and osmolality in surrounding *** to the standard of ISO 10993 Part 13,the pH value shall be appropriate to the site of intended use maintaining in an appropriate *** to overcome these challenges include the selection of adequate alloying elements,proper surface treatment techniques and control of the degradation rate of Mg or its alloys developed as orthopedic *** date,Mg or its alloy-based bone implants have not yet been widely used in clinical applications as medical *** review critically summarized published methods to improve the corrosion resistance of Mg and its *** current progress on in vitro cytotoxicity and in vivo biocompatibility properties of these metals was also *** review aimed to provide a reference for further research and development(R&D)of biodegradable Mg and its alloys with regard to the evaluation of their corrosion process and biocompatibility and facilitation of their translation to clinical applications.

关键词： magnesium alloy biocompatibility corrosion bone implant

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Natural selection contributes to the myopia epidemic

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National Science Review 2021年第6期8卷 128-135页

作者： Erping long Jianzhi zhang Department of Ecology and Evolutionary Biology University of Michigan State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen University

The prevalence of myopia, or nearsightedness, has skyrocketed in the past few decades, creating a public health crisis that is commonly attributed to lifestyle changes. Here we report an overall increase in the frequencies of myopia-associated mutant alleles over 25 years among participants of the UK *** myopia itself appears to be selected against, many of the mutant alleles are associated with reproductive benefits, suggesting that reproduction-related selection inadvertently contributes to the myopia epidemic. We estimate that, in the UK alone, natural selection adds more than 100 000 myopia cases per generation, and argue that antagonistic pleiotropy be broadly considered in explaining the spreads of apparently disadvantageous phenotypes in humans and beyond.

关键词： allele frequency natural selection antagonistic pleiotropy evolution myopia reproduction

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Developments and challenges ahead in blue perovskite light-emitting devices

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Journal of Energy Chemistry 2022年第8期31卷 418-433,I0011页

作者： Lin zhang Run long College of Chemistry Key Laboratory of Theoretical&Computational Photochemistry of Ministry of EducationBeijing Normal UniversityBeijing 100875China

Recently,perovskite light-emitting diodes(Pe LEDs)have developed rapidly in the green,red,and nearinfrared light emissions,owing to the unique optoelectronic characteristics of halide perovskites,such as high carrier mobility,narrow emission linewidths,high photoluminescence quantum yield,as well as bandgap ***,the efficiency improvement in blue(especially deep-blue)Pe LEDs is still inferior to other analogs,which severely restricts the Pe LED ***,we systematically summarize the substantial progress in the performance of blue Pe LEDs based on different blue perovskite candidates,and recent advances from three aspects(i.e.,the sky-blue,pure-blue,and deep-blue light emissions).Then,we point out several challenges existing in deep-blue Pe LEDs,such as the effect of Cl-ions incorporation,spectral instability,ion migration,and the difficulty of charge injection,and highlight the strategies to improve device efficiency,to motivate further research and development of blue Pe LEDs.

关键词： Perovskite Blue emission Light-emitting diodes Stability Efficiency

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Relationship between dietary niacin intake and erectile dysfunction:a population-based study

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Asian Journal of Andrology 2024年第4期26卷 382-388页

作者： Wei-long Lin Cheng Zheng Hao-Xu Wang Wei zhang ming-En Lin Department of Urology The First Affiliated Hospital of Shantou University Medical CollegeMedical College of Shantou UniversityShantou 515041China The Second School of Clinical Medicine Southern Medical UniversityGuangzhou 510260China.

Existing research on the precise link between dietary niacin intake and erectile dysfunction(ED)is ***,this study aimed to investigate the potential association between dietary niacin intake and the risk of *** logistic regression and restricted cubic splines(RCSs)were used to examine the relationship between dietary niacin intake and *** interaction analysis was performed to assess the impact of different subgroups on the study *** addition,1:1 propensity score matching(PSM)was employed to adjust for potential confounding factors,ensuring the reliability of the *** analyzed data were collected from the 2001–2004 National Health and Nutrition Examination Survey(NHANES)in the *** study encompassed 3184 adults,among whom 863 participants were identified as having *** adjustments for potential confounders,the findings revealed that higher niacin intake,specifically in the highest tertile,was associated with a decreased risk of ED compared to that in the lowest tertile,showing an odds ratio(OR)of 0.56(95%confidence interval[CI]:0.37–0.85).Analysis of dose–response curves illustrated a negative correlation between dietary niacin intake and the risk of *** and interaction analyses fortified the consistency of these ***,PSM corroborated the validity of the *** study suggests an inverse association between dietary niacin intake and the risk of ***,establishing a cause-and-effect relationship remains elusive,and defining the safe threshold of niacin intake to prevent ED requires further investigation.

关键词： dietary niacin erectile dysfunction National Health and Nutrition Examination Survey propensity score matching

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Symmetry selective directionality in near-field acoustics

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National Science Review 2020年第6期7卷 1024-1035页

作者： Yang long Hao Ge Danmei zhang Xiangyuan Xu Jie Ren ming-Hui Lu ming Bao Hong Chen Yan-Feng Chen Center for Phononics and Thermal Energy Science China-EU Joint Center for Nanophononics Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology School of Physics Sciences and Engineering Tongji University Department of Materials Science and Engineering College of Engineering and Applied Sciences and National Laboratory of Solid State Microstructures Nanjing University Key Laboratory of Noise and Vibration Research Institute of Acoustics Chinese Academy of Sciences Collaborative Innovation Center of Advanced Microstructures Nanjing University Key Laboratory of Noise and Vibration Research Institute of Acoustics Chinese Academy of Sciences Beijing 100190 China and4Collaborative Innovation Center of Advanced Microstructures Nanjing University

Understanding unidirectional and topological wave phenomena requires the unveiling of intrinsic geometry and symmetry for wave dynamics. This is essential yet challenging for the flexible control of near-field evanescent waves, highly desirable in broad practical scenarios ranging from information communication to energy radiation. However, exploitations of near-field waves are limited by a lack of fundamental understanding about inherent near-field symmetry and directional coupling at sub-wavelengths, especially for longitudinal waves. Here, based on the acoustic wave platform, we show the efficient selective couplings enabled by near-field symmetry properties. Based on the inherent symmetry properties of three geometrically orthogonal vectors in near-field acoustics, we successfully realize acoustic Janus, Huygens,spin sources and quadrupole hybrid sources, respectively. Moreover, we experimentally demonstrate fertile symmetry selective directionality of those evanescent modes, supported by two opposite meta-surfaces. The symmetry properties of the near-field acoustic spin angular momenta are revealed by directly measuring local vectorial fields. Our findings advance the understanding of symmetries in near-field physics, supply feasible approaches for directional couplings, and pave the way for promising acoustic devices in the future.

关键词： acoustics near field symmetry

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Interplay between Hydrogen Bond Network and Entangled Network in Polymers During Stretching Based on Molecular Simulations

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Chinese Journal of Polymer Science 2024年第12期42卷 2069-2080,I0014页

作者： Jian-long Wen Yong-Qiang ming Ao-Fei zhang Jiang-long Li Xiao-Yu Du Lang Shuai Yi-Jing Nie Institute of Polymer Materials School of Materials Science and EngineeringJiangsu UniversityZhenjiang212013China

Mechanical properties of polymers can be regulated by changing the numbers of hydrogen bonds and entanglement ***,the interplay between hydrogen bond network and entangled network during stretching has not been fully *** performed molecular dynamics simulations to investigate the changes of hydrogen bonds and entanglements during *** stretching causes the orientation of local segments,leading to the entanglement sliding and disentanglements at different strain ***,the number of entanglement points keeps constant at first and then decreases with increasing ***,the orientation of local segments can cause the change of chain conformation,which leads to the breakage of hydrogen ***,the number of hydrogen bonds decreases with the increase of *** results also demonstrated that the number of hydrogen bonds decreases faster during stretching in systems containing more *** systems with different hydrogen bond site contents,the initial number of entanglement nodes and its decline range during stretching increase firstly and then decrease with the increase of hydrogen bond site content.

关键词： Moleculardynamics simulations Hydrogen bonds Entanglements

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The Existence of Two Closed Characteristics on Every Compact Star-shaped Hypersurface in R^4

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Acta Mathematica Sinica,English Series 2016年第1期32卷 40-53页

作者： Hui LIU Yi ming long School of Mathematical Sciences University of Science and Technology of China Chern Institute of Mathematics and LPMC Nankai University

Recently, Cristofaro-Gardiner and Hutchings proved that there exist at least two closed characteristics on every compact star-shaped hypersuface in R4. Then Ginzburg, Hein, Hryniewicz, and Macarini gave this result a second proof. In this paper, we give it a third proof by using index iteration theory, resonance identities of closed characteristics and a remarkable theorem of Ginzburg et at.

关键词： Compact star-shaped hypersurface closed characteristic Hamiltonian systems resonanceidentity multiplicity

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Ultralight and compressive SiC nanowires aerogel for high-temperature thermal insulation

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Rare Metals 2023年第10期42卷 3354-3363页

作者： Jun-Xiong zhang Jing zhang Xin-Li Ye Xiao-ming Ma Rong Liu Qi-long Sun Yun-Lei Zhou School of Textile and Clothing Nantong UniversityNantong226019China School of Civil Aviation Northwestern Polytechnical UniversityXi’an710072China National Equipment New Materials&Technology(Jiangsu)Co. LtdSuzhou215101China Hangzhou Institute of Technology Xidian UniversityHangzhou311231China

Aerogels with excellent properties combination of ultralow density and great thermal insulation are drawing attention to applications in harsh *** aerogels,however,are usually constructed with nanoparticles with a weakness in physical *** silicon carbide nano wire(SiC_(NW)) is a kind of one-dimensional(1D) nano wire possessing the promising properties of flexibility,great thermal insulation,and stability at high *** aerogel constructed by the SiC_(NW) will produce a great material with a promising material,the amazing SiC_(NW) ***,a novel SiC_(NW) aerogel was fabricated consisting of quantities of β-SiC_(NW) of15-40 nm in diameter and tens to hundreds of micrometers in *** SiC_(NW) aerogel possessed an ultralow density of 5.82 mg·cm^(-3),high-temperature resistance,and great thermal insulation with its thermal conductivities of0.063 W·m^(-1)·K^(-1) at 100℃ and 0.243 W·m^(-1)·K^(-1) at900℃ in ***,the thermal insulation applicability of this aerogel was *** study provides a promising way for designing and fabricating other multifunctional nanowire aerogels for high-temperature thermal insulation.

关键词： SiC nanowires Aerogel Thermal insulation Thermal conductivity

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Deciphering the role of ultra-low-loaded rhodium in NiFe-MIL-53 for superior oxygen evolution reaction

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Journal of Energy Chemistry 2025年第1期100卷 77-86页

作者： Jinzhi Jia Jinhua zhang Kailu Guo Lanyue zhang Gening Du Hao You Junfeng Huang Mudong Tu Hua Li Yong Peng Wei Dou Cailing Xu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering School of Materials and Energy Lanzhou University College of Chemistry and Chemical Engineering Luoyang Normal University

Designing highly active and stable electrocatalysts of oxygen evolution reaction （OER） is one of the crucial *** this study,a novel OER electrocatalyst,NiFe-MIL-53 modified with ultra-low rhodium（Rh@NiFe-MIL-53）,is successfully prepared via the hydrothermal ***-situ Raman spectroscopy and electrochemical impedance spectroscopy reveal that the doped Rh accelerates the phase transformation of NiFe-MIL-53 and the in-situ formed Rh@NiFeOOH is the actual active *** importantly,the enhanced reversibility of electrochemical reconstruction between NiFeOOH and NiFe（OH）2after doping Rh is beneficial for improving the electrochemical stability of the catalyst.X-ray photoelectron spectroscopy spectra show the strong electronic interaction between single-atom Rh and Ni/Fe in Rh@***,theoretical calculations confirm that the integration of single-atom Rh into the NiFeOOH successfully reduces the band gap,regulates the d-band center （εd）,accelerates the charge transfer,and optimizes the adsorption behavior of oxygen-containing intermediates,thereby lowering the energy barrier of rate-determining ***,the optimized Rh@NiFe-MIL-53 exhibits excellent OER activity （240 mV） with a small Tafel slope of 48.2 mV dec-1and long-term durability (over1270 h at 10 m A cm-2and 110 h at 200 mA cm-2).This work presents a new perspective on designing highly efficient OER electrocatalysts.

关键词： NiFe-MIL-53 Rh Electrochemical reconstruction Catalytic mechanism Oxygen evolution reaction

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2D phosphides heterostructures on titanium microfiltration membrane for enhanced ampere-level current density overall seawater splitting

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Nano Research 2025年第1期18卷 249-259页

作者： Wenjing Dai Xin Wang Yulong Ma Sisi He ming Chen Zhaohui Yin Shuheng Tian Maolin Wang Shixiang Yu Hang zhang Yuanzhe Wang Hong Wang Jianxin Li Faming Gao Bowen Cheng Yun Wang Zhen Yin Ding Ma Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization College of Chemical Engineering and Materials ScienceTianjin University of Science and TechnologyTianjin 300457China State Key Laboratory of Biobased Fiber Manufacturing Technology Tianjin University of Science and TechnologyTianjin 300457China Haian Institute of High-Tech Research Nanjing UniversityHaian 226600China Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Separation Membranes and Membrane Processes Separation Membrane Science and Technology International Joint Research CentreTiangong UniversityTianjin 300387China Centre for Catalysis and Clean Energy School of Environment and ScienceGold Coast CampusGriffith UniversitySouthportQueensland 4222Australia

The advancement of direct seawater electrolysis is a significant step towards sustainable hydrogen production,addressing the critical need for renewable energy sources and efficient resource ***,direct seawater electrolysis has to face several challenges posed by the corrosiveness of highly concentrated chloride and the competitive chlorine evolution reaction(ClER).To overcome these issues,we designed a novel NiP_(2)@CoP electrocatalyst on a porous titanium microfiltration(Ti MF)*** obtained bifunctional NiP_(2)@CoP catalyst outperforms the Pt/C and IrO_(2),as evidenced by its low overpotentials of 192 and 425 mV at a current density of 500 mA·cm^(-2) for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in alkaline seawater(1 M KOH+0.5 M NaCl),***,only 231 and 569 mV overpotentials are required at the current density of 1500 mA·cm^(-2) towards HER and OER in alkaline seawater,*** importantly,no ClER was observed,demonstrating its excellent selectivity to *** selection of porous Ti MF membrane as an electrode substrate further enhances the performance by providing a robust structure that promotes the fast generation and release of gas *** promising outcomes obtained with NiP_(2)@CoP catalysts on Ti MF support,therefore,pave the way for the commercial viability of direct seawater electrolysis technologies at industrial-level current densities.

关键词： direct seawater electrolysis porous titanium microfiltration membrane phosphides heterostructures NiP_(2)@CoP electrocatalyst excellent selectivity to oxygen evolution reaction(OER)

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