检索结果-南通市图书馆

Acta Metallurgica Sinica(English Letters) 2020年第8期33卷 1145-1150页

作者： Bang Dou hui Zhang Jia-Hao Zhu Ben-Qi Xu zi-Yi Zhou Ji-li Wu Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials(Ministry of Education) Anhui University of TechnologyMa'anshan 243002China School of Materials Science and Engineering Anhui University of TechnologyMa'anshan 243002China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China

A medium-entropy high-speed steel(ME-HSS)coating with the 76 at.%of Fe and multiple alloying elements was prepared by the wide-band laser *** with the commercial W6 Mo5 Cr4 V2(M2)HSS coating which contains a large number of network lamellar M2 C-type carbides along the grain boundaries,the presented ME-HSS coating has a high quantity of fi ner and more uniformly dispersed M C-type carbides;on the other hand,the coating has less retained austenite and much lower brittleness as well as similar secondary hardening eff ect and tempering hardness.

关键词： High-speed steel Medium-entropy alloy Phase selection Laser cladding

Conclusions in Theory and Practice for Advancing the Applications of Cable-Driven Mechanisms

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2017年第4期30卷 763-765页

作者： Bin zi Yuan li School of Mechanical Engineering Hefei University ofTechnology Hefei 230009 China

The theoretical research of cable-driven mechanisms is developed with its broad applications. The first prototype of cable-driven mechanisms is RoboCrane, which was developed by the National Institute of Standards and Technology （NIST）. Then many excellent properties were developed and they have a variety of applications such as aerospace, aircraft and automobile industries [1]. Example application for RoboCrane in the field of aircraft mainte- nance is equipped with a quick-change mechanism to remove the robot arm remotely.

关键词： In more Conclusions in Theory and Practice for Advancing the Applications of Cable-Driven Mechanisms

Traditional Chinese Medicine Erhuang Suppository for Treatment of Persistent High-risk Human Papillomavirus Infection and Its Impact on Transcriptome of Uterine Cervix

在线全文

学校读者我要写书评

暂无评论

Current Medical Science 2024年第4期44卷 841-853页

作者： zi-zhuo WANG hui-li WANG Wei XIONG Juan DU Rong liU Department of Obstetrics and Gynecology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Department of Pharmacology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China

Objective High-risk human papillomavirus(HR-HPV)infection is the chief cause of cervical intraepithelial neoplasia(CIN)and cervical *** Erhuang suppository(EHS)is a traditional Chinese medicine(TCM)prepared from realgar(As_(2)S_(2)),Coptidis rhizoma,alumen,and borneolum syntheticum and has been used for antiviral and antitumor ***,whether EHS can efficiently alleviate HR-HPV infection remains *** study was conducted to evaluate the efficacy of EHS for the treatment of persistent HR-HPV infection in the uterine *** In this study,we evaluated the therapeutic efficacy of EHS in a randomized controlled clinical trial with a 3-month ***,70 patients with persistent HR-HPV infection were randomly assigned to receive intravaginal administration of EHS or *** DNA,ThinPrep cytologic test(TCT),colposcopy,and safety evaluation were carried out after *** analysis was performed to compare transcriptome profiles before and after EHS treatment.A K14-HPV16 mouse model was generated to confirm the efficiency of *** After 3 months,74.3%(26/35)of the patients in the treatment group were HPV negative,compared to 6.9%(2/29)in the placebo ***-throughput microarrays revealed distinct transcriptome profiles after *** differentially expressed genes were significantly enriched in complement activation,immune response,and apoptotic *** K14-HPV16 mouse model also validated the remarkable efficacy of *** This study demonstrated that EHS is effective against HR-HPV infection and cervical ***,no obvious systemic toxicity was observed in patients during the *** superior efficacy and safety of EHS demonstrated its considerable value as a potential cost-effective drug for the treatment of HPV infection and HPV-related cervical diseases.

关键词： Traditional Chinese Medicine Erhuang suppository human papillomavirus cervical diseases transcriptomics

A sensitive acetaminophen sensor based on Co metal–organic framework(ziF-67)and macroporous carbon composite

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2022年第1期41卷 189-198页

作者： Jing Tang Zhen-Zhen hui Tao Hu Xin Cheng Jia-Hao Guo zi-Rong li Hao Yu College of Chemistry and Material Engineering Anhui Science and Technology UniversityBengbu 233030China

The composite of zeolitic imidazolate frameworks(ziF-67)and ordered macroporous carbon(OMC)was successfully synthesized via in situ growth from the OMC *** ziF67–OMC composite was verified by scanning electron microscopy(SEM)and transmission electron microscopy(TEM),powder X-ray diffraction(XRD)and electrochemical impedance spectroscopy(EIS)and then evaluated as a modified material for electrochemical *** from the large surface area and enhanced conductivity of the ziF67–OMC composite,ziF67–OMC nanocomposite showed superior electrocatalytic performance toward acetaminophen(AP)*** redox reaction of AP underwent a quasi-reversible redox reaction with higher anodic current at ziF67–OMC modified electrode compared with the bare glassy carbon electrode(GCE).In optimal condition,the ziF67–OMC/GCE was stable,reproducible and had a linear range of 0.05–100 μmol·L^(-1) AP concentration,with the detection limit of 20 nmol·L^(-1)(signal-to-noise of S/N=3).In addition,the prepared sensing platform for the detection of AP was evaluated for the compound paracetamol tablets and urine samples.

关键词： Macroporous carbon ziF-67 Acetaminophen Modified electrode

Construction of Ni single-atom coordinated with doped N and S elements for mild hydrogenation of methyl acrylate to methyl propionate

在线全文

学校读者我要写书评

暂无评论

Nano Research 2025年第1期18卷 217-224页

作者： Taolue Sun Chen Jian Gang Wang hui Zhao Guoliang Zhang Zengxi li Chunshan li State Key Laboratory of Mesoscience and Engineering CAS Key Laboratory of Green Process and EngineeringBeijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China huizhou Institute of Green Energy and Advanced Materials Huizhou 516081China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516081China

Although the nickel-based catalyst is able toexhibit comparative catalytic activity to noble metal formethyl acrylate hydrogenation,it requires strict reactioncondition,which can be improved by regulation ofcoordination *** this study,we constructed akind of Ni single-atom coordinated with N and S(Ni-NSC)through the pyrolysis of organic Ni-based precursors at600℃.The existence and fine structure of Ni single-atom were confirmed by the spherical electron microscopicobservation in combination with the X-ray absorption spectroscopy(XAS)*** addition,the catalytichydrogenation assessment suggested that the as-prepared Ni-NSC catalyst exhibited higher activity and stability than theNi/NSC supported catalyst prepared by incipient wetness impregnation *** remarkable catalytic activity was dueto the high dispersion and density of Ni single-atom and weak adsorption energy of intermediates on these Ni sites.

关键词： methyl acrylate mild hydrogenation Ni single-atom coordination environment adsorption energy

Plasmon-induced local electric field improved hydrogen evolution reaction on Ag/Mo_(2)C nanosheets

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2025年第1期18卷 270-277页

作者： HuangJingWei li Xin zi Jun Wu Xinli Wang li Zhu Qiyou Wang Jianfu Han Junwei Fu Hongmei li Kai Huang Yu Chen Min liu School of Physics State Key Laboratory of Powder MetallurgyHunan Joint International Research Center for Carbon Dioxide Resource UtilizationCentral South UniversityChangsha 410083China School of Metallurgy and Environment Central South UniversityChangsha 410083China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Nano-Institute Munich Faculty of PhysicsLudwig-Maxilimians-Universität MünchenMünchen 80539Germany Hunan Institute of Advanced Sensing and Information Technology Xiangtan UniversityXiangtan 411105China

Electrocatalytic water splitting offers a promising way for hydrogen production with near-zero ***,such as molybdenum carbides(Mo_(2)C),are promising materials for hydrogen evolution reaction(HER)but still suffer from poor intrinsic water activation ***,we developed a plasmon-induced local electric field(PILEF)strategy to solve this ***(Ag)nanoparticles decorated Mo_(2)C nanosheets(Ag/Mo_(2)C)were successfully prepared by electrostatic *** visible light excited the PILEF on Ag/Mo_(2)C remarkably reducing the activation energy by 92.7 kJ·mol^(-1)from 147.3 kJ·mol^(-1)of Mo_(2)C to 54.6 kJ·mol^(-1).As a result,the plasmonic Ag/Mo_(2)C significantly enhances~2.3-fold of the current density from 2.8 mA·cm^(-2)of Mo_(2)C to 6.5 mA·cm^(-2)at-3 V *** and reduces the overpotential by 104 mV from 403 mV of dark state to 299 mV of light state at the current density of 10 mA·cm^(-2),achieving better performance than reported *** research demonstrates that PILEF enhances HER activities,offering a potential strategy for boosting the intrinsic activities of catalysts.

关键词： sliver particles plasmon effect field effect hydrogen evolution reaction(HER) electrocatalysis

Rare earth element-doped porous In_(2)O_(3) nanosheets for enhanced gas-sensing performance

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2021年第6期40卷 1662-1668页

作者： Wen-hui Zhang Su-Jun Ding Qing-Song Zhang hui Yi zi-Xiang liu Meng-li Shi Kong-Feng Guan Lu Yue Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of TechnologyYancheng 224051China

Rare earth(La,Pr,Sm,Ce and Yb)-doped porous In_(2)O_(3) nanosheets are prepared by a solvothermal *** effect of rare earth elements on the structure,morphologies and gas-sensing performance of In_(2)O_(3) nanosheets is systematically *** mixed phase composed of c-In_(2)O_(3) and rh-In_(2)O_(3) can be transformed into rh-In_(2)O_(3) by doping with rare earth *** doping with rare earth elements,the morphology can be changed from compact nanosheets to porous *** with pure In_(2)O_(3) and La,Pr,Sm,Ce-doped porous In_(2)O_(3) nanosheets,Yb-doped In_(2)O_(3) nanosheets present the best gas-sensing *** 3%-10%Yb-doped samples,6%Yb-doped In_(2)O_(3) porous nanosheets exhibit the optimal gas-sensing performance to 5×10^(-6)-750×10^(-6) acetone,giving a high response of 15.3 toward 50×10^(-6) acetone and fast response/recovery time at the operating temperature of 220℃.Moreover,6% Yb-doped porous In_(2)O_(3) nanosheet sensor also exhibits excellent selectivity and stability,indicating its potential in the nextgeneration gas sensor.

关键词： In_(2)O_(3) Doping Rare earth elements Gas sensor Acetone

Deciphering fungal metabolon coupling tandem inverse-electrondemand Diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第01期 288-296页

作者： Shuai liu Wen-Qiang Xu Ying-Tong Di Man-Cheng Tang Ding-Kang Chen Ming-Ming Cao Yao-Wen Chang Hong-Yu Tang Chun-Mao Yuan Jun-Bo Yang Zhi-li Zuo Han Guo zi-Fei Xu Ying Zeng Yun-Dong Wu Xiao-Jiang Hao Key Laboratory of Phytochemistry and Natural Medicines (Chinese Academy of Sciences) Kunming Institute of Botany Chinese Academy of Sciences University of Chinese Academy of Sciences Lab of Computational Chemistry and Drug Design State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen Bay Laboratory State Key Laboratory of Microbial Metabolism School of Life Sciences & Biotechnology Shanghai Jiao Tong University State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest China Kunming Institute of Botany Chinese Academy of Sciences Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of Botany Chinese Academy of Sciences Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical Sciences

In the intricate process of natural product biosynthesis, a metabolon can enhance metabolic flux by associating sequential enzymes. A fungal metabolon, comprising of flavin-dependent monooxygenase Spe F and P450 monooxygenase Spe G, is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide B. Using notoamide E as a substance, Spe F/Spe G metabolon can control the stereoselectivity of its 2,3-epoxidation, followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-m A with dienyl iminium unit. Subsequently,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand Diels-Alder reaction and semipinacol rearrangement. This provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

关键词：

同方期刊数据库

Manufacturing process and microstructure of copper-coated aluminum wires

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2015年第2期22卷 190-196页

作者： Xiao-hua Chen Xin Tang zi-dong Wang Xi-dong hui Mo li Yong-wei Wang State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing School of Materials Science and Engineering Georgia Institute of Technology School of Materials Science and Engineering University of Science and Technology Beijing School of Mechanical Engineering University of Science and Technology Beijing

Copper-coated aluminum wires exhibit good electrical conductivity, high thermal conductivity, low contact resistance of copper and low density, and provide economic advantages over aluminum. However, there are some problems in the manufacring processes of hot-dip copper-coated aluminum wires, such as the difficulties in controlling coating process. In this work, the hot-dip copper-coating method of aluminum wires was investigated for producing copper-coated aluminum wire composites. The interface microstructure between the aluminum wire and the copper coating layer was analyzed by scanning electron microscopy （SEM） and energy-dispersive X-ray spec- trometry （EDS）. Five different fluxing agents were tested. Experimental results show that appropriate conditions for the hot-dip process are determined as the liquid copper temperature of 1085℃ and the treatment time less than 1 s. A success in hot-dip copper-coated aluminum wires is achieved by hot-dipping a low-melting-point metal into a high-melting-point metal liquid, which is significant for the further devel- opment and application of copper-coated aluminum wire composites.

关键词： bimetallic composites copper aluminum hot dip coating interfaces

An Isometric Embedding of Mbius Band with Positive Gaussian Curvature

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2004年第6期20卷 961-964页

作者： hui Xia HE zi Zhou TANG Department of Mathematical Sciences Tsinghua University College of Mathematical Sciences Beijing Normal University

The main purpose of this paper is to show that there is an isometric embedding from M?bius band to ?4 with positive Gaussian curvature.

关键词： Veronese map Gaussian curvature Isometric immersion