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Chinese Physics B 2021年第1期30卷 568-571页

作者： Yan Wang Shuai Luo Haiming Ji Di qu Yidong Huang Innovation Center of Advanced Optoelectronic Chip Institute for Electronics and Information Technology in TianjinTsinghua UniversityTianjin 300467China Tianjin H-Chip Technology Group Corporation Tianjin 300467China Department of Electronic Engineering Tsinghua UniversityBeijing 100084China Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

We demonstrate high-performance broadband tunable external-cavity lasers(ECLs) with the metal-organic chemical vapor deposition(MOCVD) grown In As/In P quantum dots(QDs) structures. Without cavity facet coatings, the 3-d B spectral bandwidth of the Fabry–Perot(FP) laser is approximately 10.8 nm, while the tuning bandwidth of ECLs is 45 *** with the anti-reflection(AR)/high-reflection(HR) facet coating, a 92 nm bandwidth tuning range has been obtained with the wavelength covering from 1414 nm to 1506 nm. In most of the tuning range, the threshold current density is lower than 1.5 k A/cm2. The maximum output power of 6.5 m W was achieved under a 500 m A injection *** achievements mentioned above were obtained under continuous-wave(CW) mode at room temperature(RT).

关键词： InAs/InP quantum dot external-cavity laser continuous-wave operation metal-organic chemical vapor deposition

Au nanowires with high aspect ratio and atomic shell of Pt-Ru alloy for enhanced methanol oxidation reaction

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Chinese Chemical Letters 2021年第6期32卷 2033-2037页

作者： Xiran Zhu Zheng Hu Ming Huang Yuxin Zhao Jianqiang qu Shi Hu Tianjin Key Laboratory of Molecular Optoelectronic Science Department of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China Institute of Energy Hefei Comprehensive National Science CenterHefei 230026China School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'an 710049China

The methanol oxidation reaction(MOR)is the limiting half-reaction in direct methanol fuel cell(DMFC).Although Pt is the most active single-metal electrocatalyst for MOR,it is hampered by high cost and CO *** a Pt or Ru monolayer on a second metal substrate by means of galvanic replacement of underpotentially deposited(UPD)Cu monolayer has been shown as an efficient catalyst design strategy for the electrocatalysis of MOR because of the presumed 100%utilization of atoms and resistance to CO ***,we prepared one-dimensional surface-alloyed electrocatalyst from predominantly(111)faceted Au nanowires with high aspect ratio as the substrate of under-potential *** electrocatalyst comprises a core of the Au nanowire and a shell of catalytically active Pt coated by ***-dependent electro-catalytic activity and stability is demonstrated on the Pt/Ru submonolayers on Au wires for *** all these catalysts,Au@Pt_(ML)@Ru_(ML)exhibits the best electrocatalytic activity and poisoning tolerance to *** presents a viable method for the rational catalyst design for achieving high noble-metal utilization efficiency and high catalytic performance.

关键词： Au nanowires Pt/Ru submonolayers Underpotentially deposited Core-shell nanostructure Methanol oxidation reaction

A New Spirostanol Saponin from Dioscorea futshauensis

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Chinese Chemical Letters 2001年第7期12卷 613-616页

作者： Hong Wei LIU Hisayoshi KOBAYASHI Ge Xia qu Xin Sheng YAO Department of Natural Products Chemistry Shenyang Pharmaceutical UniversityShenyang 110015 Institute of Molecular&Cellular Biosciences The University of TokyoTokyoJapan 113

A new spirostanol saponin presenting strong activity of inducing morphological deformation of Pyricularia oryzae mycelia was isolated from Dioscorea futshauensis R. Kunth by bioactivity-guided fractionation. The structure was established as (25S)-spirost-5-en-3 beta, 27-diol-3-O- [alpha -L-rhamnopyranosyl (1 -->2)-beta -D glucopyranosyl (1 -->3)]-beta -D-glucopyranoside on the basis of chemical evidences and spectral analysis, especially by 2D-NMR techniques.

关键词： New spirostanol glycoside Dioscorea futshauensis Pyricularia oryzae

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清水池观察级水下机器人巡检装置设计与实践

中国给水排水 2024年第12期40卷 105-109页

作者：袁曲周冬胡彪王海龙祝灵童力孙倜王凌云武汉市自来水有限公司制水部湖北武汉430034 华中科技大学电气与电子工程学院湖北武汉430074

针对清水池巡检作业中存在需要停产、作业环境差、劳动强度大和成本高等问题,提出了清水池水下机器人巡检的技术方案。在对清水池水下巡检作业进行功能需求、性能需求分析的基础上,给出了装置的具体设计方案,并集成了一套清水池观察级... 详细信息

针对清水池巡检作业中存在需要停产、作业环境差、劳动强度大和成本高等问题,提出了清水池水下机器人巡检的技术方案。在对清水池水下巡检作业进行功能需求、性能需求分析的基础上,给出了装置的具体设计方案,并集成了一套清水池观察级水下机器人巡检装置。在4座清水池进行了水下视频检查、水样采集、泥砂沉积测量和杂物拾取等实验验证,结果表明该技术方案经济、可行,装置实现了清水池不停产水下巡检作业的目标。

关键词：清水池观察级水下机器人巡检装置巡检作业

Concise syntheses of 13-methylprotoberberine and 13-methyltetrahydroprotoberberine alkaloids

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Chinese Chemical Letters 2022年第12期33卷 5080-5083页

作者： Wenchang Chen Xiaofen Yi Hongmin qu Yu Chen Pei Tang Fener Chen Sichuan Research Center for Drug Precision Industrial Technology West China School of PharmacySichuan UniversityChengdu 610041China Engineering Center of Catalysis and Synthesis for Chiral Molecules Department of ChemistryFudan UniversityShanghai 200433China hanghai Engineering Center of Industrial Asymmetric Catalysis for Chiral Drugs Shanghai 200433China

The concise syntheses of eight 13-methylprotoberberine(13-MePB)and eight enantioenriched 13-methyltetrahydroprotoberberine(13-MeTHPB)alkaloids have been achieved in a tactically modular *** synthetic work features a one-pot metal-free Pictet-Spengler/Friedel-Crafts hydroxyalkylation/dehydration/oxidation sequence and a following highly enantioselective Ir-catalyzed *** such brevity and modularity,our developed synthetic route would be greatly beneficial to the efficient syntheses of existing natural products and new fully synthetic variants of 13-MePB and 13-MeTHPB family.

关键词： 13-Methylprotoberberine 13-Methyltetrahydroprotoberberine One-pot metal-free sequence Asymmetric hydrogenation

Cdc2-like kinases:structure,biological function,and therapeutic targets for diseases

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Signal Transduction and Targeted Therapy 2023年第5期8卷 2088-2112页

作者： Mengqiu Song Luping Pang Mengmeng Zhang Yingzi qu Kyle Vaughn Laster Zigang Dong Department of Pathophysiology School of Basic Medical SciencesCollege of MedicineZhengzhou UniversityZhengzhouHenan450001China China-US(Henan)Hormel Cancer Institute No.127Dongming RoadJinshui DistrictZhengzhouHenan450008China State Key Laboratory of Esophageal Cancer Prevention and Treatment Zhengzhou UniversityZhengzhouHenanChina Academy of Medical Sciences College of MedicineZhengzhou UniversityZhengzhouHenan450001China Research Center of Basic Medicine Academy of Medical SciencesCollege of MedicineZhengzhou UniversityZhengzhouHenan450001China

The CLKs(Cdc2-like kinases)belong to the dual-specificity protein kinase family and play crucial roles in regulating transcript splicing via the phosphorylation of SR proteins(SRSF1–12),catalyzing spliceosome molecular machinery,and modulating the activities or expression of non-splicing *** dysregulation of these processes is linked with various diseases,including neurodegenerative diseases,Duchenne muscular dystrophy,inflammatory diseases,viral replication,and ***,CLKs have been considered as potential therapeutic targets,and significant efforts have been exerted to discover potent CLKs *** particular,clinical trials aiming to assess the activities of the small molecules Lorecivivint on knee Osteoarthritis patients,and Cirtuvivint and Silmitasertib in different advanced tumors have been investigated for therapeutic *** this review,we comprehensively documented the structure and biological functions of CLKs in various human diseases and summarized the significance of related inhibitors in *** discussion highlights the most recent CLKs research,paving the way for the clinical treatment of various human diseases.

关键词： diseases therapeutic specificity

ROLLING CONTACT FATIGUE BEHAVIOR OF CERAMIC BALLS LUBRICATED BY LUBRICANTS WITH EXTREME PRESSURE ADDITIVES

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Chinese Journal of Mechanical Engineering 2006年第2期19卷 195-199页

作者： ZHANG Feng S0NG Baoyu qu Jianjun LIU Weimin School of Mechatronics Engineering Harbin Institute of TechnologyHarbin 150001 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000 China

An experiment is conducted to investigate the effects of lubricant10#, which contains extreme pressure additives T304 and T305, on the rolling contact fatigue （RCF） life of the contact pairs of a Si3N4 ceramic ball and a steel rod. The experimental investigation is carried out using a ball-rod RCF test rig. The results show that the extreme pressure additives increase the anti-contact-fatigue performance of ceramic balls; When the content of the additives varies from 1% to 5%, the increasing gradient of the RCF life curve decreases; And the oil sample with 1% T305 additive corresponds to the maximal gradient of the RCF life curve, with the RCF life being increased by about 10.77 times. The fatigue surface of the ceramic ball is analyzed with scanning electron microscope （SEM） and X-ray electron dispersion analysis（EDAX）, and the physical model of extreme pressure additives＇ increasing the RCF life of the ceramic ball is proposed. It is found that the extreme pressure additives form a corrosive film and a transfer film on the surface of the ceramic ball, which decrease the surface tangential stress, and to increase the surface energy is the most effective means for increasing the RCF life.

关键词： Ceramic bearing Si3N4 ceramic Rolling contact fatigue Extreme pressure additive

Time history of seismic earth pressure response from gravity retaining wall based on energy dissipation

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Journal of Mountain Science 2022年第2期19卷 578-590页

作者： qu Hong-lue DENG Yuan-yuan GAO Ya-nan HUANG Xue ZHANG Zhe School of Geoscience and Technology Southwest Petroleum UniversityChengdu 610500China State Key Laboratory for GeoMechanics and Deep Underground Engineering China University of Mining&TechnologyBeijing 100083China China University of Mining&Technology Xuzhou 221116China

The seismic design of gravity retaining walls is based mostly on the pseudo static *** seismic earth pressure is assumed to be a constant without considering the wave traveling effect when the seismic wave propagates through the ***,under continuous ground motion,the actual earth pressure on the retaining wall varies with *** present seismic earth pressure calculation method yields results that differ significantly from the actual *** this,a slip surface curve was assumed in this *** is more suitable for engineering *** addition,a theoretical calculation model based on energy dissipation was *** time history of seismic earth pressure response under continuous ground motion was calculated using the equilibrium equation between the external power and the internal energy dissipation power of the sliding soil *** can more effectively reflect the stress scenario of a retaining wall under seismic *** verify the applicability of the proposed approach,a large-scale shaking table test was conducted,and the time history of the seismic earth pressure response obtained from the experiment was compared with the calculation *** results show that the proposed approach is applicable to the calculation of the time history of seismic earth pressure response of gravity retaining *** lays the foundation for the seismic design of retaining structures by using dynamic time history.

关键词： Energy dissipation Time history of seismic earth pressure response Slip surface curve Gravity retaining wall Shaking table test

Fabrication of N-CQDs@W_(18)O_(49) heterojunction with enhanced charge separation and photocatalytic performance under full-spectrum ligh irradiation

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Chinese Chemical Letters 2021年第10期32卷 3180-3184页

作者： Ju Huang Jiawen Wang Zhengjia Hao Chensha Li Binsong Wang Yang qu Department of Environmental Science School of Chemistry and Materials ScienceKey Laboratory of Functional Inorganic Material ChemistryMinistry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin 150080China

Increasing the charge separation and the utilization efficiency of sunlight are essential factors in a photocatalytic *** this study,we prepared crystalline N-CQDs@W_(18) O_(49) heterostructures,through the in situ growth of W_(18) O_(49) nanocrystals on nitrogen-doped carbon quantum dots(N-CQDs).N-CQDs@W_(18) O_(49) nanocomposites showed high activity in the photodegradation of ciprofloxacin(CIP)and methyl orange(MO).The photodegradation activity of the optimized N-CQDs@W_(18) O_(49)-5 sample was four times higher than that of W_(18) O_(49) under ultraviolet-visible(UV–vis) light *** photodegradation activity of N-CQDs@W_(18) O_(49)-5 sample was two times higher than that of W_(18) O_(49) under near-infrared(NIR) light *** enhanced photosensitivity of the nanocomposites was attributed to the promotion of charge separation by N-CQDs and the local surface plasmon resonance(LSPR) effect of W_(18) O_(49) under NIR light *** work provides a promising approach for designing and manufacturing photocatalysts with full-spectral responsiveness and improved charge separation.

关键词： Photocatalysis Full-spectrum light Tungsten oxide Localized surface plasmon resonance Nitrogen-doped carbon quantum dots

Development of Laser-HVEM and Its Application on In-situ Observation on Lattice Defects Behavior

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Chinese Journal of Structural Chemistry 2020年第4期39卷 623-629页

作者： YANG Zhan-Bing YANG Su-Bing qu Xiao-Jian SHIBAYAMA Tamaki WATANABE Seiichi School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Graduate School of Engineering Hokkaido UniversitySapporoHokkaido 060-8628Japan Centre for Advanced Research of Energy and Materials Faculty of EngineeringHokkaido UniversitySapporoHokkaido 060-8628Japan

A nanosecond pulse laser source head(Nd:YAG laser,Inlite Ⅱ-20,Continuum)was equipped to a high-voltage electron microscope(HVEM,Hitachi,H-1300)to develop a laser-HVEM system at Hokkaido *** the laser-HVEM,new methods for in-situ observation on the formation process of laser-induced lattice point defects at the internal of crystalline solid are achieved;some striking phenomena and potential mechanisms are *** the present paper,we review our progresses on in-situ experiments of lattice defects behavior in metal using the *** progresses are expected to provide insight for a broader application of laser-HVEM in scientific research.

关键词： Laser high-voltage electron microscope Dual-beam irradiation in-situ observation Lattice defect