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Journal of Energy Chemistry 2024年第1期88卷 513-520,I0011页

作者： Feng Zhou Xiaofeng Ke Yihuang Chen Mei Zhao Yun yang Youqing Dong Chao Zou Xi’an Chen Huile Jin Lijie Zhang Shun Wang Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325000ZhejiangChina Zhejiang Engineering Research Center for Electrochemical Energy Materials and Devices Institute of New Materials&Industry TechnologyWenzhou UniversityWenzhou 325000ZhejiangChina

The scarcity,high cost and susceptibility to CO of Platinum severely restrict its application in alkaline hydrogen oxidation reaction(HOR).Hybridizing Pt with other transition metals provides an effective strategy to modulate its catalytic HOR performance,but at the cost of mass activity due to the coverage of modifiers on Pt ***,we constructed dual junctions'Pt/nitrogen-doped carbon(Pt/NC)andδ-MoC/NC to modify electronic structure of Pt via interfacial electron transfer to acquire Pt-MoC@NC catalyst with electron-deficient Pt nanoparticles,simultaneously endowing it with high mass activity and durability of alkaline ***,the unique structure of Pt-MoC@NC endows Pt with a high COtolerance at 1,000 ppm CO/H_(2),a quality that commercial Pt-C catalyst *** theoretical calculations not only confirm the diffusion of electrons from Pt/NC to Mo C/NC could occur,but also demonstrate the negative shift of Pt d-band center for the optimized binding energies of*H,*OH and CO.

关键词： Hydrogen oxidation reaction Dual junctions CO-tolerance Platinum

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新世纪以来史料发现与中国现当代文学研究

扬子江文学评论 2024年第1期 11-17页

作者：杨扬上海戏剧学院

如果将新世纪作为一个时间段来考察,回顾一下这些年重要的史料发现与中国现当代文学研究的进展,应该是一个比较有意义的研究论题。这不仅仅是对一个阶段的史料发掘工作进行小结,同时也能够从文学史研究角度,回眸一下史料搜集、整理工作... 详细信息

如果将新世纪作为一个时间段来考察,回顾一下这些年重要的史料发现与中国现当代文学研究的进展,应该是一个比较有意义的研究论题。这不仅仅是对一个阶段的史料发掘工作进行小结,同时也能够从文学史研究角度,回眸一下史料搜集、整理工作的进展对文学史研究的影响。

关键词：文学史研究中国现当代文学研究史料发掘史料搜集新世纪以来时间段

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我国闪锌矿中Ge资源富集与提取研究进展

金属矿山 2024年第2期 69-79页

作者：张胜东杨波谢维友童雄谢贤云南师范大学化学化工学院云南昆明650500 昆明学院化学化工学院云南昆明650214 昆明理工大学国土资源工程学院云南昆明650093

Ge是一种战略性稀散金属,在现代工业中发挥着重要作用。闪锌矿作为Ge最主要的载体矿物,是工业上提取回收Ge的重要来源,闪锌矿提Ge在Ge资源开发中占据重要地位。分别从闪锌矿中Ge的赋存状态、载Ge闪锌矿的浮选理论工艺及药剂研究、硫化... 详细信息

Ge是一种战略性稀散金属,在现代工业中发挥着重要作用。闪锌矿作为Ge最主要的载体矿物,是工业上提取回收Ge的重要来源,闪锌矿提Ge在Ge资源开发中占据重要地位。分别从闪锌矿中Ge的赋存状态、载Ge闪锌矿的浮选理论工艺及药剂研究、硫化锌冶炼过程中Ge的迁移与富集规律和从含Ge冶炼富集物中深度富集回收Ge的方法与工艺等方面,系统概述了近年来我国闪锌矿中Ge资源富集与提取技术开发和工业实践的现状。闪锌矿中Ge主要以类质同象形式存在,Ge取代导致闪锌矿的铜活化和黄药捕收活性降低、浮选回收难度增加。工业实践表明,通过优化载体矿物载锗闪锌矿的浮选药剂和工艺,可在一定程度上提升硫化锌精矿中Ge回收效果。在目前常用的硫化锌冶炼工艺中,形成的含Ge富集物主要包括真空炉渣、浸出渣、氧化锌烟尘、锗铁渣、中和渣、置换渣等。针对上述Ge富集物,目前形成了以火法富集、浸出法、沉淀法、萃取法和离子交换法等为主的Ge深度富集提取技术,其中浸出—沉淀/溶剂萃取的发展和应用最为成熟。在分析发展现状的基础上,提出需从重视选别阶段Ge回收指标提升、改进冶炼工艺的提升Ge在冶炼产物中富集程度和强化Ge萃取分离技术开发及工业化应用3个方面进一步提高我国闪锌矿中Ge资源富集提取技术水平。

关键词：锗资源富集与提取载锗闪锌矿赋存状态

Surface/Interface Engineering of Hierarchical MoO_(2)/MoNi_(4)@Ru/RuO_(2)Heterogeneous Nanosheet Arrays for Alkaline Water Electrolysis with Fast Kinetics

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Chinese Journal of Chemistry 2024年第2期42卷 119-128页

作者： Qiong Zhang Ruixue Zhang Yingxiu Zhao Tiantian Sun Jianyang Gao Guang-Rui Xu Zexing Wu Yu yang Lei Wang Key Laboratory of Eco-chemical Engineering Key Laboratory of Optic-electric Sensing and Analytical Chemistry of Life ScienceTaishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and TechnologyCollege of Chemistry and Molecular EngineeringSchool of Materials Science and EngineeringQingdao University of Science and TechnologyQingdaoShandong 266042China College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdaoShandong 266042China

Realizing the hydrogen economy by water electrolysis is an attractive approach for hydrogen production,while the efficient and stable bifunctional catalysts under high current densities are the bottleneck that limits the half-cell reactions of water ***,we propose an approach of hydrothermal and thermal annealing methods for robust MoO_(2)/MoNi_(4)@Ru/RuO_(2) heterogeneous cuboid array electrocatalyst with multiplying surface-active sites by depositing a monolayer amount of *** from abundant MoO_(2)/MoNi_(4)@Ru/RuO_(2)heterointerfaces,MoO_(2)/MoNi_(4)@Ru/RuO_(2) heterogeneous cuboid array electrocatalysts effectively drive the alkaline water splitting with superior hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)*** synthesized MoO_(2)/MoNi_(4)@Ru/RuO_(2) has high HER activity,which realizes the working overpotentials of 48 mV at 50 mA·cm^(-2),further achieving overpotentials of 230 mv for industry-level 1000 mA·cm^(-2) in alkaline water ***,it also showed an enhanced OER activity than commercial RuO_(2) with a small overpotential of 280 mV at 200 mA·cm^(-2) in alkaline *** building an electrolyzer with electrodes of(-)MoO_(2)/MoNi_(4)@Ru/RuO_(2)IIMo02/MoNig@Ru/RuO_(2)(+),a cell voltage of 1.63 V and 1.75 V is just required to support the current density of 200 mA·cm^(-2) and 500 mA-cm^(-2) in alkaline water electrolysis,much lower than that of the electrolyzer of(-)Pt/CIIRuO_(2)(+).This work demonstrates that MoO_(2)/MoNig@Ru/RuO_(2) heterogeneous nanosheet arrays are promising candidates for industrial water electrolysis applications,providing a possibility for the exploration of water electrolysis with a large currentdensity.

关键词： Hierarchical heterostructure Surface engineering Bifunctional catalysts Hydrogen evolution reaction Oxygen evolution reaction Watersplitting Catalytic activity Electrocatalysis Heterogeneous catalysis

Self-sufficient nanoparticles with dual-enzyme activity trigger radical storms and activate cascade-amplified antitumor immunologic responses

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Acta Pharmaceutica Sinica B 2024年第2期14卷 821-835页

作者： Liping Bai Jin yang Siting Yu Zhongzheng Xiang Yuanyuan Zeng Meiling Shen Xiaorong Kou Qinjie Wu Changyang Gong Department of Biotherapy Cancer Center and State Key Laboratory of BiotherapyWest China HospitalSichuan UniversityChengdu 610041China

Radiotherapy(RT) can potentially induce systemic immune responses by initiating immunogenic cell death(ICD) of tumor ***,RT-induced antitumor immunologic responses are sporadic and insufficient against cancer ***,we construct multifunctional self-sufficient nanoparticles(MARS) with dual-enzyme activity(GOx and peroxidase-like) to trigger radical storms and activate the cascade-amplified systemic immune responses to suppress both local tumors and metastatic *** addition to limiting the Warburg effect to actualize starvation therapy,MARS catalyzes glucose to produce hydrogen peroxide(H_(2)O_(2)),which is then used in the Cu^(+)-mediated Fenton-like reaction and RT *** and chemodynamic therapy produce reactive oxygen species in the form of radical storms,which have a robust ICD impact on mobilizing the immune ***,when MARS is combined with RT,potent systemic antitumor immunity can be generated by activating antigen-presenting cells,promoting dendritic cells maturation,increasing the infiltration of cytotoxic T lymphocytes,and reprogramming the immuno suppre ssive tumor ***,the synergistic therapy of RT and MARS effectively suppresses local tumor growth,increases mouse longevity,and results in a 90% reduction in lung metastasis and postoperative ***,we provide a viable approach to treating cancer by inducing radical storms and activating cascade-amplified systemic immunity.

关键词： Dual-enzyme activity Radiotherapy Chemodynamic therapy Fenton-likereaction Radical storms Immunogeniccell death Tumormicroenvironment Systemicimmunity

Anti-inflammatory and DNA Repair Effects of Astragaloside IV on PC12 Cells Damaged by Lipopolysaccharide

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Current Medical Science 2024年第4期44卷 854-863页

作者： Hai-long LI Li-hua SHAO Xi CHEN Meng WANG Qi-jie QIN Ya-li yang Guang-run ZHANG yang HAI Yi-hong TIAN Department of Geriatrics The Affiliated Hospital of Gansu University of Chinese MedicineLanzhou730000China Key Laboratory for Mining Innovation and Transformation of Traditional Chinese Medicine in Gansu Province and the New Product Creation Engineering Laboratory of Traditional Chinese Medicine in Gansu ProvinceLanzhou730000China Department of Neurology the First People’s Hospital of LanzhouLanzhouGansu730000China School of Public Health Gansu University of Chinese MedicineLanzhou730000China People’s Hospital of Gansu Province Lanzhou730000China Scientific Research and Experimental Center Gansu University of Chinese MedicineLanzhou730000China

Objective This study aimed to establish a neural cell injury model in vitro by stimulating PC12 cells with lipopolysaccharide(LPS)and to examine the effects of astragaloside IV on key targets using high-throughput sequence technology and bioinformatics *** PC12 cells in the logarithmic growth phase were treated with LPS at final concentrations of 0.25,0.5,0.75,1,and 1.25 mg/mL for 24 *** morphology was evaluated,and cell survival rates were calculated.A neurocyte inflammatory model was established with LPS treatment,which reached a 50%cell survival ***12 cells were treated with 0.01,0.1,1,10,or 100µmol/L astragaloside IV for 24 *** concentration of astragaloside IV that did not affect the cell survival rate was selected as the treatment group for subsequent *** activity was detected by colorimetry;the expression levels of ERCC2,XRCC4,XRCC2,TNF-α,IL-1β,TLR4,NOS and COX-2 mRNA and protein were detected by RT-qPCR and Western *** differentially expressed genes(DEGs)between the groups were screened using a second-generation sequence(fold change>2,P0.05).However,after treatment with 0.5,0.75,1,or 1.25 mg/mL LPS for 24 h,the viability steadily decreased(P<0.01).The mRNA and protein expression levels of ERCC2,XRCC4,XRCC2,TNF-α,IL-1β,TLR4,NOS,and COX-2 were significantly increased after PC12 cells were treated with 1 mg/mL LPS for 24 h(P<0.01);however,these changes were reversed when PC12 cells were pretreated with 0.01,0.1,or 1µmol/L astragaloside IV in PC12 cells and then treated with 1 mg/mL LPS for 24 h(P<0.05).Second-generation sequencing revealed that 1026 genes were upregulated,while 1287 genes were downregulat

关键词： PC12 cells astragaloside IV inflammation DNA damage

Influence of pier height on the safety of trains running on high-speed railway bridges during earthquakes

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Journal of Central South University 2024年第6期31卷 2102-2115页

作者： NIE Yu-tao GUO Wei JIANG Li-zhong YU Zhi-wu ZENG Chen WANG yang HE Xu-en REN Shao-xun HUANG Ren-qiang LIANG Guang-yue LI Chang-qing School of Civil Engineering Central South UniversityChangsha 410075China National Engineering Research Center of High-speed Railway Construction Technology Central South UniversityChangsha 410075China

Sudden earthquakes pose a threat to the running safety of trains on high-speed railway bridges,and the stiffness of piers is one of the factors affecting the dynamic response of train-track-bridge *** this paper,a experiment of a train running on a high-speed railway bridge is performed based on a dynamic experiment system,and the corresponding numerical model is *** reliability of the numerical model is verified by ***,the experiment and numerical data are analyzed to reveal the pier height effects on the running safety of trains on *** results show that when the pier height changes,the frequency of the bridge below the 30 m pier height changes greater;the increase of pier height causes the transverse fundamental frequency of the bridge close to that of the train,and the shaking angle and lateral displacement of the train are the largest for bridge with 50 m pier,which increases the risk of derailment;with the pier height increases from 8 m to 50 m,the derailment coefficient obtained by numerical simulations increases by 75% on average,and the spectral intensity obtained by experiments increases by 120% on average,two indicators exhibit logarithmic variation.

关键词： pier height high-speed railway bridge running safety numerical model

Carbene-Catalyzed Asymmetric Ring-Opening Reaction of Biaryl Lactams to Access Axially Chiral Biaryls

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Chinese Journal of Chemistry 2024年第15期42卷 1734-1740页

作者： Guanjie Wang Guowei Yuan Chenlong Wei Ye Zhang Haibin Zhu Weiqi yang Dongping Shi Xiaoxiang Zhang Zhenqian Fu Institute of Advanced Materials Nanjing Tech UniversityNanjingJiangsu 211816China Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical EngineeringNanjing Forestry UniversityNanjingJiangsu 210037China

Axially chiral biaryls represent the most important class of atropisomers,and they widely exist in natural products and biologically active *** also constitute a unique scaffold for chiral ligands and catalysts in organic *** development of synthetic methods to obtain such chiral compounds has received widespread attention,among which catalytically atroposelective ring-opening of configurationally labile compounds represents one of the most attractive *** substrates with strained cyclic structures,such as the renowned Bringmann's lactones,can undergo asymmetric transformation into stable *** advancement primarily relies on metal catalyst combined with well-designed chiral ligands,the approaches utilizing organocatalysis as a critical resolution strategy are notably *** this study,we disclosed a N-heterocyclic carbene(NHC)-catalyzed asymmetric ring-opening reaction of biaryl lactams via direct atroposelective nucleophilic *** optimized bulky carbene catalyst ensures that the reaction can proceed under mild conditions,affording the desired product with good to excellent yields and atroposelectivity.

关键词： N-Heterocyclic carbene Axially chiral biaryls Organocatalysis Ring-opening reactions Dibenzo cyclic lactams Axially chiral amino acids Amide C-N bond activation Atropisomerism Asymmetric catalysis Lactams

成形路径对Al/CFRTP/Al层板冲压成形特性的影响

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塑性工程学报 2024年第9期31卷 36-45页

作者：王健王重阳丁梓峻熊浪胥亮燕山大学国家冷轧板带装备及工艺工程技术研究中心河北秦皇岛066004 燕山大学机械工程学院河北秦皇岛066004 海安太原理工大学先进制造与智能装备产业研究院江苏南通226600

为提升纤维金属层板成形质量和成形精度,研究了不同成形路径对Al/CFRTP/Al层板冲压成形特性的影响规律。通过回弹角度测量、微观形貌分析以及三点弯曲试验,研究了制板成形、成形固化和混合共冲3种不同成形路径对纤维金属层板U形件成形... 详细信息

为提升纤维金属层板成形质量和成形精度,研究了不同成形路径对Al/CFRTP/Al层板冲压成形特性的影响规律。通过回弹角度测量、微观形貌分析以及三点弯曲试验,研究了制板成形、成形固化和混合共冲3种不同成形路径对纤维金属层板U形件成形特性的影响。结果表明,混合共冲制备的试件回弹角度为1.34°,中间层内外侧0°方向碳纤维发生拉伸断裂,并形成了贫富树脂区和厚度不均匀等宏观缺陷。成形固化制备的试件回弹角度为2.84°,中间层内外侧0°方向碳纤维均发生拉伸断裂,厚度分布均匀,无宏观缺陷,综合性能较好,成形质量较为可控。

关键词： Al/CFRTP/Al层板冲压成形成形路径回弹角度成形质量

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Influence of sintering time on microstructure and properties of hot oscillatory pressing sintered W–Cu refractory alloys

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Tungsten 2024年第2期6卷 323-332页

作者： Zi-Qian Wu Wei Zhao Ka Gao Shi-Hao Du Qing-Quan Kong De-Jian Sun yang Gao School of Materials Science and Engineering Zhengzhou University of AeronauticsZhengzhou 450015China School of Mechanical Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of General Medicine Changhai HospitalShanghai 200000China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and TechnologyWuhan 430081China Sichuan Province Engineering Technology Research Center of Powder Metallurgy Chengdu UniversityChengdu 610106China

W–Cu refractory alloys are widely used in aerospace,aviation,electronics,power,and other fi ***,because of its large melting point diff erence between alloy elements,the conventional powder metallurgy method required a long time of high temperature sintering is very likely to cause low density and abnormal grain size ***,90W-10Cu refractory alloys were successfully prepared by hot oscillatory pressing(HOP)under diff erent sintering time in this *** the infl uence of sintering time on the microstructure,grain size,density,Vickers hardness,room-tensile property,and electrical conductivity of the W–Cu refractory alloy was systematically *** results showed that during the short sintering time(30–90 min),the density,Vickers hardness,tensile strength,and electrical conductivity of the W–Cu refractory alloy increased signifi cantly to 98.7%,163.29 HV 30,507.3 MPa,and 14.2%International Annealed Copper Standard with the sintering time increasing,respectively,while its grain size showed no obvious *** the sintering time further increased to 120 min,the density was basically consistent with the sintering time of 90 ***,the prolonged high temperature sintering resulted in the grain growth of the samples,which caused the deterioration of the Vickers hardness,room-tensile strength,and conductivity properties of the W–Cu refractory *** the same sintering time,the density,Vickers hardness,and electrical conductivity of the HOP sintered W–Cu refractory alloy were signifi cantly higher than those of the HP sintered *** was indicated that high density,fi ne-grain,and excellent properties W–Cu refractory alloys could be prepared by hot oscillatory pressing under appropriate sintering time.

关键词： W–Cu refractory alloy Hot oscillatory pressing Sintering time Microstructure Property