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journal of Magnesium and Alloys 2023年第10期11卷 3829-3839页

作者： y.j.hu j.y.Wang W.Zhai B.Wei School of Physical Science and Technology Northwestern Polytechnical UniversityXi’an 710072China

One dimensional(1D) and three dimensional(3D) ultrasound sources were applied to the solidification process of Mg_(71.5)Zn_(26.1)y_(2.4) *** acoustic spectra were in-situ measured, based on which the cavitation intensities and dynamic solidification mechanism were further investigated. With the increase of ultrasonic dimension and amplitude, the primary Mg_(3)Zn_(6)y phase was significantly refined from petals to nearly pentagonal shape. The sound field measurements showed that the transient cavitation played a decisive role in generating a high local undercooling, which facilitated the formation of icosahedral clusters and promoted the nucleation of primary Mg_(3)Zn_(6)y phase. The morphological transition of(α-Mg+Mg_(3)Zn_(6)y) eutectic from lamellar to anomalous structure occurred under 3D ultrasonic condition. The stable cavitation took the main responsibility because the high pressure excited by nonlinearly oscillating bubbles induced the preferential nucleation of α-Mg phase rather than Mg_(3)Zn_(6)y phase. As compared with its static values, the tensile strength and compression plasticity of this alloy were increased by the factors of 1.9 and 2.1, and its corrosion resistance was also improved with the corrosion current density decreased by one order of magnitude.

关键词： Three dimensional ultrasounds Quasicrystalline Mg_(3)Zn_(6)y phase Anomalous eutectic Mechanical performances Corrosion resistance

Microcalorimetric Investigation of the Antibacterial Activity of jatrorrhizine

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Microcalorimetric Investigation of the Antibacterial Activit...

Optical Properties of Nanosilver Synthesized by Chemical Reduction Method at Room Temperature

第十七届全国化学热力学和热分析学术会议

作者： R.Mi y.j.hu hubei Key Laboratory of Pollutant Analysis ＆ Reuse Technology Department of Chemistry Hubei Normal University

Isoquinoline alkaloids exhibit not only significant activity against a variety of organisms including bacteria, viruses, fungi, protozoans, helminthes, and chlamydia, but also potential anticancer properties. jatrorrhizine, an isoquinoline alkaloid, is an important medicinal herbal extract possessing diverse pharmacological and biological activities. In this antibacterial agents study, microcalorimetry was used to investigate interaction between jatrorrhizine and three kinds of bacteria, Shigella dysenteriae（S. dysenteriae）, Staphylococcus aureus（S. aureus） and Escherichia coli（E. coli） to evaluate the antibacterial effect of jatrorrhizine through analyzing the power-time curves, quantitative parameters, such as the growth rate constant（k）, maximum heat output power（Pmax）, peak time of maximum heat output power（tp） which were obtained to characterize the interactions. The results showed that jatrorrhizine presented strong antibacterial effect on the three kinds of bacteria with the sequence of inhibitory effects as: S. aureus ＞ S. dysenteriae ＞ E. coli. And the results were in accordance with clinical efficacy trials references. jatrorrhizine might be used as a potential novel antibacterial agent in practice. Microcalorimetric investigation of the effect of antibacterial agent on bacterial pathogens was promising in comparison to other methods.

关键词： jatrorrhizine microcalorimetry S.aureus S.dysenteriae E.coli

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Optical Properties of Nanosilver Synthesized by Chemical Red...

Characterizing the interaction between human serum albumin and naringenin by fluorescence spectroscopy and electrochemical measurements

第十七届全国化学热力学和热分析学术会议

作者： S.jiang A.M.Bai y.j.hu hubei Key Laboratory of Pollutant Analysis ＆ Reuse Technology Department of ChemistryHubei Normal University

Nanosilver has been applied in many fields including surface-enhanced Raman spectroscopy（SERS）,surface enhanced fluorescence（SEF）,biomedicine and other areas due to the its unique physical and chemical *** this paper,nanosilver equipped with uniform dispertion,controllable partical size and morphology was prepared by chemical reduction method in aqueous *** reaction can be carried out at room temperature（298.15K）by taking silver nitrate as the source,sodium borohydride as a reducing agent,sodium citrate tribasic dihydrate and Polyvinylpyrrolidone as protective ***,we focused on the effects of reaction time,temperature,protective agents and so forth on the experimental *** analysis of UV–vis spectra（Fig.1）showed that the surface plasmon resonance（SPR）absorption peaks of asprepared nanosilver appeared at about 400 nm and 650 nm,which demonstrated the formation of nanosilver corresponding to different morphologies and particle *** addition,sharp and smooth peaks indicated a uniform dispersion.

关键词： Nanosilver chemical reduction method UV-vis spectrum surface plasmon resonance(SPR)

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Characterizing the interaction between human serum albumin a...

Electrochemical conversion of methane to bridge the gap in the artificial carbon cycle

第十七届全国化学热力学和热分析学术会议

作者： B.Tu R.Mi y.Ouyang y.j.hu hubei Key Laboratory of Pollutant Analysis ＆ Reuse Technology Department of Chemistry Hubei Normal University

The interaction between naringenin and human serum albumin was carried out under physiological conditions via fluorescence spectroscopy and electrochemical measurements. The experimental results demonstrated that the interaction between HSA-Nar binding initiated by compound formation is high affinity to site I and may induces the slight unfolding of the polypeptides. The calculated thermodynamic parameters revealed that the process is spontaneous and driven mainly by electrostatic interactions. Unraveling the interaction of Nar with HSA would throw light on the prospective understanding of drug action mechanisms and the possibility of designing novel medicines.

关键词： naringenin human serum albumin fluorescence spectroscopy electrochemical measurements

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journal of Energy Chemistry 2025年第1期100卷 286-308页

作者： yuhao Peng yuefeng Song Ihar Razanau juanxiu Xiao Wei Xiao Di hu Guoxiong Wang College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Dalian Institute of Chemical Physics Chinese Academy of Sciences Laboratory of Physical-Chemical Technologies SSPA Scientific and Practical Materials Research Centre of NAS of Belarus State Key Laboratory of Marine Resources Utilization in South China Sea Collaborative Innovation Center of Marine Science and Technology School of Marine Science and Engineering Hainan University Department of Chemical and Environmental Engineering University of Nottingham Ningbo China

Methane, an abundant one-carbon（C1） resource, is extensively used in the industrial production of vital fuels and value-added chemicals. However, current industrial methane conversion technologies are energy-and carbon-intensive, mainly due to the high activation energy required to break the inert C–H bond, low selectivity, and problematic side reactions, including CO2emissions and coke deposition. Electrochemical conversion of methane（ECM） using intermittent renewable energy offers an attractive solution, due to its modular reactor design and operational flexibility across a broad spectrum of temperatures and pressures. This review emphasizes conversion pathways of methane in various reaction systems, highlighting the significance and advantages of ECM in facilitating a sustainable artificial carbon cycle. This work provides a comprehensive overview of conventional methane activation mechanisms and delineates the complete pathways of methane conversion in electrolysis contexts. Based on surface/interface chemistry, this work systematically analyzes proposed reaction pathways and corresponding strategies to enhance ECM efficiency towards various target products, including syngas, hydrocarbons, oxygenates, and advanced carbon materials. The discussion also encompasses opportunities and challenges for the ECM process, including insights into ECM pathways, rational electrocatalyst design, establishment of benchmarking protocols, electrolyte engineering, enhancement of CH4conversion rates, and minimization of CO2emission.

关键词： Activation energy

Tumor inflammation-specific self-amplifying fluorescent molecular probes induce an anti-tumor immune response

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Science China Chemistry 2025年第1期 273-287页

作者： Shuguang yang Lijun hu Hong Xiao Zecong Xiao Xintao Shuai PCFM Lab of Ministry of Education School of Materials Science and Engineering Sun Yat-sen University Department of Ultrasound The Fifth Affiliated Hospital Sun Yat-sen University Department of Medical Ultrasound The Third Affiliated Hospital of Sun Yat-sen University Nanomedicine Research Center The Third Affiliated Hospital of Sun Yat-sen University

Enhancing the concentration of exogenous molecular drugs within the tumor microenvironment through enzyme-catalyzed polymerization presents a novel strategy for cancer therapy. Nonetheless, the optimization of the catalytic efficiency is often impeded by the inefficient expression of enzymes. Herein, we reported a self-amplifying fluorescent molecular probe, Bis-HTPICG, for photodynamic therapy(PDT) and subsequent PDT-induced immunoreaction. The Bis-HTP-ICG probe possesses a noticeable enzyme-catalyzed polymerization facilitated by myeloperoxidase(MPO), a crucial enzyme secreted by neutrophils at inflammation sites. Upon exposure to laser irradiation, Bis-HTP-ICG showed a high PDT efficacy, inducing an acute inflammatory response that stimulates further recruitment of neutrophils and then elevated MPO secretion. The heightened level of MPO enhances the accumulation of the Bis-HTP-ICG via self-polymerization or binding with intratumoral proteins following MPO enzyme catalysis, instigating a self-amplifying chain reaction cycle involving Bis-HTP-ICG, neutrophils and ***, PDT efficiently incites immunogenic cell death(ICD) in tumor cells, initiating an anti-tumor immune response including dendritic cells(DCs) maturation, T cell proliferation and reprogramming of tumor-associated neutrophils(TANs). This work portrays a promising strategy for self-amplification of fluorescent molecular probes through adjustable enzyme levels,potentially offering a unique avenue to enhance the tumor accumulation of molecular drugs for improved tumor therapy.

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An SBFEM-Based Model for Hydraulic Fracturing in Quasi-Brittle Materials

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Acta Mechanica Solida Sinica 2018年第4期31卷 416-432页

作者： F. yao Z.j. yang y.j. hu College of Civil Engineering and Architecture Zhejiang University Hangzhou 310058 China School of Civil Engineering Shaoxing University Shaoxing 312000 China

A numerical model based on the scaled boundary finite element method is devel- oped to simulate the hydraulic fracturing in concrete-like quasi-brittle materials using cohesive interface elements. The shadow domain method developed previously （yang and Deeks in Eng Fract Mech 143（4）：333 354, 2007） is extended to consider crack-width-dependent hydraulic pres- sure and cohesive traction, so that the stress intensity factors caused by both crack-face forces are semi-analytically calculated separately in the same way. The crack propagation is determined by the criterion of KI ≥ 0, and the propagation direction by the linear elastic fracture mechanics criteria. Two examples of concrete structures are modeled, and the results are in good agreement with the experimental data and others numerical results.

关键词： Scaled boundary finite element method Hydraulic fracture Cohesive crackmodel Crack propagation

Suppression of grain boundary migration at cryogenic temperature in an extremely fine nanograined Ni-Mo alloy

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journal of Materials Science & Technology 2020年第22期54卷 65-69页

作者： j.hu j.X.Li y.-N.Shi Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Institute of Advanced Materials East China JiaoTong UniversityNanchang 330013China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

Microindentation creep tests on an electrodeposited extremely fine(4.9 nm) nanograined(ng) Ni-14.2 at.% Mo(Ni-14.2 Mo) at both room temperature(RT) and liquid nitrogen temperature(LNT) demonstrated that lowering temperature retarded softening in the ng Ni-Mo alloy. The obtained strain rate sensitivity at LNT was one order of magnitude lower than that at RT. Microstructural characterization revealed that mechanically-driven grain boundary(GB) migration was greatly suppressed by lowering temperature,which might be ascribed to the presence of solute Mo atoms that significantly retarded coupled GB motion at LNT. Deformation was instead carried by shear bands.

关键词： Extremely fine nanograined metals Mechanically-driven grain boundary migration Cryogenic temperature Shear bands Solute atoms

Formation,characteristics and control of sludge in Al-containing magnesium alloys:An overview

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journal of Magnesium and Alloys 2022年第3期10卷 643-658页

作者： y.Fu G.G.Wang A.hu y.Li K.B.Thacker j.P.Weiler H.hu Department of Mechanical Automotive and Materials EngineeringUniversity of Windsor401 Sunset AveWindsorON N9B 3P4Canada Global Technology Centre Meridian Lightweight Technologies25 MacNab AveStrathroyON N7G 4H6Canada

Sludge consisting of heavy element phases and oxides is often generated during the casting operation of aluminum(Al)and magnesium(Mg)*** the help of the well-established Sludge Factor(SF)formula,it is relatively easy to control the sludge generation in aluminum *** formation mechanisms and characteristics of sludge in die casting magnesium alloys are still *** ensure the production of high quality die cast components at a low cost,a full understanding of sludge in die casting Mg alloys and its proper control measures need to be developed,since excessive sludge formation affects deleteriously material and operation cost,and casting *** the present report,the formation,characteristics and control of Mg die-casting sludge,based on the established knowledge of sludge formation and sludge factor in Al die casting alloys,are *** work on characterization and assessment of sludge in die cast Mg alloys are *** principles for control of sludge in ingot production in association with die casting of Mg alloys are *** assessment of Mg oxide and intermetallics relevant to sludge formation in Mg alloys are highlighted.

关键词： Sludge Magnesium alloys Die casting Al-Mn(-Fe)intermetallics Magnesium oxide Microstructure characterization

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社交媒体健康信息用户信任形成机理研究

现代情报 2025年第1期45卷 97-111页

作者：初彦伯王萍胡姝姝吉林大学商学与管理学院吉林长春130012

[目的/意义]在公共卫生事件频发的背景下,国民对健康信息需求急剧增长。社交媒体作为用户信息获取的重要途径之一,在高效传播健康信息的同时,也为虚假健康信息的产生和传播提供便利条件。随着社交媒体渗透力和影响力不断扩大,用户对健... 详细信息

[目的/意义]在公共卫生事件频发的背景下,国民对健康信息需求急剧增长。社交媒体作为用户信息获取的重要途径之一,在高效传播健康信息的同时,也为虚假健康信息的产生和传播提供便利条件。随着社交媒体渗透力和影响力不断扩大,用户对健康信息的不确定感愈发强烈。鉴于此,本文对社交媒体健康信息用户的信任形成机理进行探索,以期为后续相关研究提供参考和借鉴。[方法/过程]解构社交媒体健康信息用户信任形成的要素,建构面向用户感知过程的信任综合框架,从用户、信息和环境3个方面提出社交媒体健康信息用户信任理论假设模型,并对结构模型进行修正。[结果/结论]研究从理论层面明晰社交媒体健康信息用户感知信任过程以及用户心理变化的进程。研究还发现热评情感极性、涉入度、信源可信度、冲突解决对信任存在显著的正向影响。信任对采纳意愿存在显著的正向影响。参照群体规范对采纳意愿存在显著的正向影响。此外,信任分别在热评情感极性、涉入度、信源可信度和冲突解决与信息采纳意愿之间起到完全中介作用。

关键词：社交媒体健康信息信任感知可信度