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Chinese Chemical Letters 2024年第5期35卷 45-56页

作者： Feifei Wang hang Yao Xinyue Wu Yijian Tang Yang Bai Hui chong Huan Pang School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China School of Pharmacy Changzhou UniversityChangzhou 213164China State Key Laboratory of Coordination Chemistry Nanjing UniversityNanjing 210023China

Metal-organic framework(MOF)is a periodic sexual network structure with large surface area and high porosity,which is assembled by inorganic nodes and organic ligands through coordinate covalent bond.MOFs have the advantages of controllable pore size and shape,large specific surface area,easy modification and more active sites.In addition,MOF based nanoenzymes display excellent enzyme catalytic activity due to their special structure and multiple exposed metal active sites,controlling the production of reactive oxygen species(ROS)in cells or the body,and thus regulating the polarization of macrophage.This article reviews the mechanism of MOF material regulating macrophage polarization and the function of macrophages with different phenotypes.By utilizing the excellent properties of MOFs and the advantages of combining them with bioactive materials,we have discovered their excellent applications in the treatment of inflammatory diseases.Finally,we discussed the current challenges and prospects faced by MOF based composite materials.We expect that the research in this developing field will play a more important role in combating inflammatory diseases in the field of nanomedicine.

关键词： Metal-organic framework Inflammation Macrophage polarization Reactive oxygen species Nanozyme activity

Defective NH2-UiO-66 for effective Pb（Ⅱ） removal:Facile fabrication strategy,performances and mechanisms

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Progress in Natural Science:Materials International 2024年第2期34卷 420-428页

作者： Meng-Yuan Liu Lu Zhang Yu-hang Li chong-Chen Wang Peng Wang Chen Zhao Huifen Fu Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation School of Environment and Energy Engineering Beijing University of Civil Engineering and Architecture

Defective NH2-UiO-66 adsorbent（named as NH2-UiO-66-SD） was successfully fabricated via post-synthesis method with the aid of both sodium carbonate anhydrous（Na2CO3） and diethylenetriaminepentaacetic acid（DTPA）,in which the defective structure was confirmed by various characterizations.The as-obtained defective NH2-UiO-66-SD exhibited outstanding Pb（Ⅱ） sorption capacity(172.21 mg g-1) and rapid diffusion rate(29.87mg g-1min-0.5) at room temperature with optimal pH being 5.47.The Pb（Ⅱ） sorption behavior was conformed to pseudo-second-order kinetics and Langmuir model,demonstrating that the chemical sorption of the monolayer played a dominant model.As well,the thermodynamic parameters like standard Gibbs free energy change ΔG~o(-31.21 kJ mol-1),standard enthalpy change ΔH~o(12.79 kJ-1mol-1) and standard entropy change ΔS~o(146.73J mol-1K-1) revealed that the Pb（Ⅱ） sorption process of NH2-UiO-66-SD was spontaneous,endothermic and disordered.Furthermore,the NH2-UiO-66-SD exhibited desirable desorption and recirculation performances（removal efficiencies>85 % in 5 runs） with ideal stability.Moreover,the Pb（Ⅱ） sorption mechanism of NH2-UiO-66-SD mainly included the electrostatic attractions and coordinative interactions.Overall,this work offered an intriguing method of fabricating defective NH2-UiO-66 adsorbent,which vastly enhanced adsorption efficiency for toxic metal ions elimination from wastewater.

关键词： Adsorption Defect Mechanism NH2-UiO-66 Pb(II)

Review of Sc microalloying effects in Al-Cu alloys

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 1098-1114页

作者： Shenghua Wu chong Yang Peng Zhang hang Xue Yihan Gao Yuqing Wang Ruihong Wang Jinyu Zhang Gang Liu Jun Sun State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China School of Materials Science and Engineering Xi’an University of TechnologyXi’an 710048China School of Aerospace Engineering North University of ChinaTaiyuan 030051China

Artificially controlling the solid-state precipitation in aluminum (Al) alloys is an efficient way to achieve well-performed properties,and the microalloying strategy is the most frequently adopted method for such a purpose.In this paper,recent advances in lengthscale-dependent scandium (Sc) microalloying effects in Al-Cu model alloys are reviewed.In coarse-grained Al-Cu alloys,the Sc-aided Cu/Sc/vacancies complexes that act as heterogeneous nuclei and Sc segregation at the θ′-Al_(2)Cu/matrix interface that reduces interfacial energy contribute significantly to θ′precipitation.By grain size refinement to the fine/ultrafine-grained scale,the strongly bonded Cu/Sc/vacancies complexes inhibit Cu and vacancy diffusing toward grain boundaries,promoting the desired intragranular θ′precipitation.At nanocrystalline scale,the applied high strain producing high-density vacancies results in the formation of a large quantity of (Cu Sc,vacancy)-rich atomic complexes with high thermal stability,outstandingly improving the strength/ductility synergy and preventing the intractable low-temperature precipitation.This review recommends the use of microalloying technology to modify the precipitation behaviors toward better combined mechanical properties and thermal stability in Al alloys.

关键词： aluminum alloy microalloying effect length-scale dependence precipitation mechanical properties

Cationic engineered nanodiamonds for efficient antibacterial surface with strong wear resistance

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Nano Research 2024年第3期17卷 939-948页

作者： Fu-Kui Li Wen-Bo Zhao Yong Wang Wen-Tao Huang Ya-Lun Ku hang Liu Rui Guo Hui-Hui Yu Kai-Kai Liu chong-Xin Shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Materials PhysicsMinistry of Educationand School of Physics&MicroelectronicsZhengzhou UniversityZhengzhou 450052China

The spread of diseases caused by bacterial adhesion and immobilization in public places constitutes a serious threat to public health.Prevention of bacteria spread by the construction of an antibacterial surface takes precedence over post-infection treatment.Herein,we demonstrate an effective antibacterial surface with strong wear resistance by constructing cationic engineered nanodiamonds(C-NDs).The C-NDs with positive surface potentials interact effectively with bacteria through electrostatic interactions,where the C-NDs act on the phospholipid bilayer and lead to bacterial membrane collapse and rupture through hydrogen bonding and residual surface oxygen-containing reactive groups.In this case,bactericidal rate of 99.99%and bacterial biofilm inhibition rate of more than 80%can be achieved with the C-NDs concentration of 1 mg/mL.In addition,the C-NDs show outstanding antibacterial stability,retaining over 87%of the antibacterial effect after stimulation by adverse environments of heat,acid,and external abrasion.Therefore,an antibacterial surface with high wear resistance obtained by integrating C-NDs with commercial plastics has been demonstrated.The antibacterial surface with a mass fraction of 1 wt.%C-NDs improved abrasion resistance by 3981 times,with 99%killing of adherent bacteria.This work provides an effective strategy for highly efficient antibacterial wear-resistant surface,showing great practical applications in public health environments.

关键词： antibacterial surface cationic engineered nanodiamonds wear-resistant

A prospective cohort of men with localized prostatecancer on active surveillance protocol in Hong Kong,China:what did we learn?

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Asian Journal of Andrology 2024年第3期26卷 245-249页

作者： Xiaobo Wu Ivan Ching-Ho Ko Cindy Yeuk-Lam Hong Samuel Chi-hang yee Jeremy Yuen-Chun Teoh Samson Yun-Sang Chan Ho-Man Tam Chi-Kwok Chan Chi-Fai Ng Peter Ka-Fung Chiu SH Ho Urology Centre Department of SurgeryFaculty of MedicineThe Chinese University of Hong KongHong KongChina.

This study aimed to report the outcomes of active surveillance(AS)in the management of low-risk prostate cancer(PCa).It recruited87 men who were prospectively followed up according to the Prostate Cancer Research International Active Surveillance(PRIAS)protocol with local adaptation at SH Ho Urology Centre,Prince of Wales Hospital,Hong Kong,China.We investigated the predictorsof disease progression and found that baseline prostate-specific antigen density(PSAD)and the presence of the highest ProstateImaging-Reporting and Data System(PI-RADS)score 5 lesion on magnetic resonance imaging(MRI)are significantly correlatedwith disease progression.Moreover,men with PSAD>0.2 ng ml^(−2)or PI-RADS 4 or 5 lesions had significantly worse upgradingfree survival compared to those with PSAD≤0.2 ng ml−2 and PI-RADS 2 or 3 lesions.The study concludes that AS is a safe andeffective management strategy for selected patients to defer radical treatment and that most disease progression can be detectedafter the first repeated biopsy.The combination of PSAD>0.2 ng ml^(−2)and PI-RADS 4 or 5 lesions may serve as a useful predictorof early disease progression and provide a guide to optimize follow-up protocols for men in different risk groups.

关键词： active surveillance cohort localized prostate cancer

A Plant SMALL RNA-BINDING PROTEIN 1 Family Mediates Cell-to-Cell Trafficking of RNAi Signals

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Molecular Plant 2020年第2期13卷 321-335页

作者： Yan Yan Byung-Kook Ham yee hang chong Shyi-Dong Yeh William J.Lucas Department of Plant Biology College of Biological SciencesUniversity of CaliforniaDavisCA 95616USA Department of Plant Pathology National Chung-Hsing UniversityTaichung Present address:Global Institute for Food Security University of SaskatchewanSaskatoonSK S7N 4J8Canada Present address:Department of Biology University of Saskatchewan112 Science PlaceSaskatoonSK S7N 5E2Canada

In plants,RNA interference(RNAi)plays a pivotal role in growth and development,and responses to environmental inputs,including pathogen attack.The intercellular and systemic trafficking of small interfering RNA(siRNA)/microRNA(miRNA)is a central component in this regulatory pathway.Currently,little is known with regards to the molecular agents involved in the movement of these si/miRNAs.To address this situation,we employed a biochemical approach to identify and characterize a conserved SMALL RNA-BINDING PROTEIN 1(SRBP1)family that mediates non-cell-autonomous small RNA(sRNA)trafficking.In Arabidopsis,AtSRBP1 is a glycine-rich(GR)RNA-binding protein,also known as AtGRP7,which we show binds single-stranded siRNA.A viral vector,Zucchini yellow mosaic virus(ZYMV),was employed to functionally characterized the AtSRBP1-4(AtGRP7/2/4/8)RNA recognition motif and GR domains.Cellular-based studies revealed the GR domain as being necessary and sufficient for SRBP1 cell-to-cell movement.Taken together,our findings provide a foundation for future research into the mechanism and function of mobile sRNA signaling agents in plants.

关键词： RNAi small RNA-binding protein family small RNA movement non-cell-autonomous protein glycinerich protein

Wearable and interactive multicolored photochromic fiber display

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Light(Science & Applications) 2024年第3期13卷 454-465页

作者： Pan Li Yuwei Wang Xiaoxian He Yuyang Cui Jingyu Ouyang Ju Ouyang Zicheng He Jiayu Hu Xiaojuan Liu hang Wei Yu Wang Xiaoling Lu Qian Ji Xinyuan Cai Li Liu chong Hou Ning Zhou Shaowu Pan Xiangru Wang Huamin Zhou Cheng-Wei Qiu Yan-Qing Lu Guangming Tao State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and Engineering and Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Vascular Aging(HUST) Ministry of EducationWuhan 430030China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and ManipulationCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China School of Performing Arts Wuhan Conservatory of MusicWuhan 430060China School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China School of Architecture and Urban Planning Huazhong University of Science and TechnologyWuhan 430074China School of Fashion Beijing Institute of Fashion TechnologyBeijing 100029China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Tongji Medical College Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Endowing flexible and adaptable fiber devices with light-emitting capabilities has the potential to revolutionize the current design philosophy of intelligent,wearable interactive devices.However,significant challenges remain in developing fiber devices when it comes to achieving uniform and customizable light effects while utilizing lightweight hardware.Here,we introduce a mass-produced,wearable,and interactive photochromic fiber that provides uniform multicolored light control.We designed independent waveguides inside the fiber to maintain total internal reflection of light as it traverses the fiber.The impact of excessive light leakage on the overall illuminance can be reduced by utilizing the saturable absorption effect of fluorescent materials to ensure light emission uniformity along the transmission direction.In addition,we coupled various fluorescent composite materials inside the fiber to achieve artificially controllable spectral radiation of multiple color systems in a single fiber.We prepared fibers on mass-produced kilometer-long using the thermal drawing method.The fibers can be directly integrated into daily wearable devices or clothing in various patterns and combined with other signal input components to control and display patterns as needed.This work provides a new perspective and inspiration to the existing field of fiber display interaction,paving the way for future human–machine integration.

关键词： fiber interactive colored

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金属超疏水涂层制备及其耐腐蚀性能研究进展

中国有色金属学报 2024年第3期34卷 703-724页

作者：尤航彭毅杨冲关小雅李婷贵州大学机械工程学院贵阳550025

金属腐蚀不仅对经济和环境带来严重影响,甚至可能威胁人类生命安全。近年来,超疏水表面因其特殊结构在防腐蚀应用中具有巨大前景,调控超疏水表面也作为一种新型耐腐蚀方法引起研究者的关注。本文介绍了超疏水模型及其表面防腐蚀的基本理... 详细信息

金属腐蚀不仅对经济和环境带来严重影响,甚至可能威胁人类生命安全。近年来,超疏水表面因其特殊结构在防腐蚀应用中具有巨大前景,调控超疏水表面也作为一种新型耐腐蚀方法引起研究者的关注。本文介绍了超疏水模型及其表面防腐蚀的基本理论,重点综述了不同方法在不同金属基底所制备出的超疏水表面在防腐蚀方面的应用,不过目前所制备的超疏水表面仍面临着实际应用的挑战,为此本文归纳总结了具有持久耐腐蚀性超疏水表面的发展趋势。

关键词：超疏水金属腐蚀涂层制备耐腐蚀表面防腐蚀

外源NaHS对盐胁迫下红砂根系形态及碳氮磷含量的影响

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草地学报 2024年第1期32卷 139-147页

作者：谭兵兵种培芳刘行行刘泽华甘肃农业大学林学院甘肃兰州730070

硫氢化钠(Sodium hydrosulfide, NaHS)在植物响应盐胁迫中起着不可或缺的作用。为探究外源NaHS对荒漠植物根系形态的影响,以一年生红砂(Reaumuria soongorica)幼苗为试验材料,研究300和400 mmol·L^(-1)NaCl胁迫下,叶面喷施蒸馏水(CK),0... 详细信息

硫氢化钠(Sodium hydrosulfide, NaHS)在植物响应盐胁迫中起着不可或缺的作用。为探究外源NaHS对荒漠植物根系形态的影响,以一年生红砂(Reaumuria soongorica)幼苗为试验材料,研究300和400 mmol·L^(-1)NaCl胁迫下,叶面喷施蒸馏水(CK),0.000,0.010,0.025,0.050,0.100,0.250,0.500,1.000 mmol·L^(-1)的NaHS溶液对红砂根系形态及碳(Carbon, C),氮(Nitrogen, N),磷(Phosphorus, P)含量的影响。结果显示:300,400 mmol·L^(-1)NaCl胁迫下根长,根系C,N,P含量较对照(CK)显著降低;经不同浓度外源NaHS处理后,根生物量、根长、比根长、根比表面积显著提高;C,N,P含量先升高后降低;根长与比表面积、C/P与C/N之间呈显著正相关关系。上述结果表明,盐胁迫抑制了红砂根系的生长,适宜浓度的外源NaHS可有效缓解盐胁迫对红砂幼苗根系生长的抑制。本研究结果可为促进红砂在盐碱地良好生长提供理论依据。

关键词：盐碱地外源NaHS 生物量元素化学计量相关性分析

恒静载降K法测定焊缝疲劳裂纹扩展门槛值研究

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天津大学学报（自然科学与工程技术版） 2024年第1期57卷 79-86页

作者：刘秀国邓冲邓彩艳梁行张涛牛得田天津大学材料科学与工程学院天津300350 天津市现代连接技术重点实验室天津300350 国家高速列车技术创新中心青岛266111

焊接残余拉应力会显著降低焊接接头疲劳性能,因此,焊接结构疲劳寿命评估参数的测定应对焊接残余应力予以充分考虑.为测得考虑焊接残余应力影响条件下的疲劳裂纹扩展门槛值,本文提出通过设定恒定平均外载以等效残余应力作用,进而逐级降... 详细信息

焊接残余拉应力会显著降低焊接接头疲劳性能,因此,焊接结构疲劳寿命评估参数的测定应对焊接残余应力予以充分考虑.为测得考虑焊接残余应力影响条件下的疲劳裂纹扩展门槛值,本文提出通过设定恒定平均外载以等效残余应力作用,进而逐级降低裂尖应力强度因子范围(ΔK)测得焊缝疲劳裂纹扩展门槛值的方法,即恒静载降K法.通过与ASTM E647-15等标准推荐测试方法所得结果对比,探究了恒静载降K法测量值适用性;通过扫描电镜(SEM)、电子背散射衍射(EBSD)等手段观察,对比分析了不同测量方法近门槛值载荷下的裂尖材料疲劳断口和变形行为.结果表明:采用恒静载降K法测量焊缝疲劳裂纹扩展门槛值最低,采用恒最大应力强度因子(K_(max))降载法的测量值次之,采用恒应力比(R)降载法的测量值最高.对比不同裂纹尖端K_(max)设定对门槛值测量的影响,发现随着K_(max)增大,门槛值测量值先快速下降,随后趋于平稳;采用恒静载降K法测定过程中K_(max)呈逐渐上升趋势,相应的门槛值测量值最低.疲劳断口显示,随着外加平均载荷增大,在近门槛值阶段断口形貌由疲劳辉纹转变为微区解理断裂;基于EBSD表征计算的裂尖材料几何必需位错密度表明,随着近门槛值外载的平均载荷增大,裂纹尖端位错密度增加.

关键词：焊缝疲劳裂纹扩展门槛值疲劳裂纹扩展速率恒静载降K法