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Graphene oxide effects on the properties of Al2O3-Cu/35W5Cr composite

Journal of Materials Science & Technology 2020年第2期37卷 185-199页

作者： Xiaohui Zhang Yi Zhang Baohong Tian Yanlin Jia ming Fu Yong liu Kexing Song AlexAVolinsky Xiao Yang Hang Sun School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471023China Collaborative Innovation Center of Nonferrous Metals Henan ProvinceLuoyang 471023China Henan Key Laboratory of Nonferrous Materials Science and Processing Technology Luoyang 471023China College of Materials Science and Engineering Beijing University of TechnologyBeijing 100124China China Airborne Missile Academy Luoyang 471023China Department of Mechanical Engineering University of South FloridaTampa 33620USA Luoyang Ship Material Research Institute Luoyang 471023China

Graphene oxide(GO)nanosheets were dispersed into premixed powders(Cu-0.4 wt%Al/35W5Cr)by wet grinding and vacuum freeze-drying *** 0.3 wt%GO/Al2O3-Cu/35W5Cr and 0.5 wt%GO/Al2O3-Cu/35W5Cr composites,used for electrical contacts,were fabricated by vacuum hot-pressing *** microstructure was analyzed by field emission scanning electron and transmission electron *** addition,the Raman spectroscopy and X-ray photoelectron spectroscopy were used to investigate the structural changes of GO before and after *** arc erosion behavior was investigated by the JF04 C electrical contact testing ***,the Al2O3 nanoparticles were evenly dispersed in the matrix,causing dislocation *** was converted to reduced graphene oxide after sintering.A group of carbon atoms combined with Cr forming Cr3C2 in situ during sintering,which enhanced the interface *** with the Al2O3-Cu/35W5Cr composite,the tensile strength of the two contact materials containing 0.3 wt%GO and 0.5 wt%GO was increased by 45%and 34%,***,pips and craters were present on the anode and cathode surfaces,*** has undergone re-sintering during arcing and formed needle-like *** with Al2O3-Cu/35W5Cr,the GO/Al2O3-Cu35W5Cr composites have better welding *** final mass transfer direction of the two composites was from the cathode to anode.

关键词： Graphene oxide Freeze-drying Electrical contact In situ formed Cr3C2 Tensile strength

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实验室化学试剂管理研究进展

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四川化工 2024年第1期27卷 32-35页

作者：刘高李铭田华吴文韬文若屹四川省产品质量监督检验检测院四川成都610100 成都产品质量检验研究院有限责任公司四川成都610100

目前国内大部分化学试剂使用实验室对化学试剂的管理属于粗放型管理方式,存在较大试剂使用浪费和管理安全隐患。对当前国内外化学试剂的管理研究进展进行综述,指出目前我国化学试剂主要采用的实验室专人管理、软件系统管理、物理分割试... 详细信息

目前国内大部分化学试剂使用实验室对化学试剂的管理属于粗放型管理方式,存在较大试剂使用浪费和管理安全隐患。对当前国内外化学试剂的管理研究进展进行综述,指出目前我国化学试剂主要采用的实验室专人管理、软件系统管理、物理分割试剂柜管理模式存在的不足,并对未来化学试剂管理研究一定是人工智能和物联网的结合应用进行了展望,以期为我国监管部门和化学试剂使用者提供参考。

关键词：实验室化学试剂管理研究进展实验室专人管理软件系统管理试剂柜物理分区管理人工智能管理发展趋势

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常染色体隐性遗传性羊毛状发伴少毛症两家系基因突变分析

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中国麻风皮肤病杂志 2024年第4期40卷 234-238页

作者：赵安琪曹巧玉郑璐瑶刘庆梅李明吴文育赵敬军上海交通大学医学院附属新华医院皮肤科上海200092 上海交通大学医学院皮肤病研究所上海200092 复旦大学附属儿科医院皮肤科上海201102 安徽省儿童医院皮肤科安徽合肥230022 复旦大学附属华山医院皮肤科上海200040

目的:检测常染色体隐性遗传性羊毛状发伴少毛患者家系的致病基因。方法:收集2例中国汉族常染色体隐性遗传性羊毛状发伴少毛家系患者及其父母外周血标本,应用二代皮肤靶向测序包检测血样中DNA的基因突变,Sanger测序进行家系验证,Minigen... 详细信息

目的:检测常染色体隐性遗传性羊毛状发伴少毛患者家系的致病基因。方法:收集2例中国汉族常染色体隐性遗传性羊毛状发伴少毛家系患者及其父母外周血标本,应用二代皮肤靶向测序包检测血样中DNA的基因突变,Sanger测序进行家系验证,Minigene验证剪切突变致病性。结果:先证者1的LIPH基因检测到c.742C>A(***248Asn)和c.982+12A>G的复合杂合突变。先证者2的LIPH基因检测到c.629-1_629delinsTT和c.686delAinsGTAGAACCCAACCTGGCT的复合杂合突变。一代测序验证显示复合杂合突变分别来自母亲和父亲。LIPH c.982+12A>G和c.629-1_629delinsTT尚未报道过,Minigene验证发现,剪切突变c.982+12A>G会导致内含子滞留;剪切突变c.629-1_629delinsTT会导致外显子跳跃和外显子缺失。结论:本文报道了LIPH的两个新剪切突变,通过家系验证和Minigene验证了剪切突变的致病性,丰富了LIPH导致常染色体隐性羊毛状发伴少毛的突变谱。

关键词：常染色体隐性遗传性羊毛状发 LIPH基因剪切突变

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Carrier transport characteristics of H-terminated diamond films prepared using molecular hydrogen and atomic hydrogen

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International Journal of Minerals,Metallurgy and Materials 2017年第7期24卷 850-856页

作者： Jin-long liu Liang-xian Chen Yu-ting Zheng Jing-jing Wang Zhi-hong Feng Cheng-ming Li Institute for Advanced Materials and Technology University of Science and Technology Beijing Science and Technology on ASIC Laboratory Hebei Semiconductor Research Institute

The H-terminated diamond films, which exhibit high surface conductivity, have been used in high-frequency and high-power electronic devices. In this paper, the surface conductive channel on specimens from the same diamond film was obtained by hydrogen plasma treatment and by heating under a hydrogen atmosphere, respectively, and the surface carrier transport characteristics of both samples were compared and evaluated. The results show that the carrier mobility and carrier density of the sample treated by hydrogen plasma are 15 cm^2·V^（-1）·s^（-1） and greater than 5 × 1012 cm^（-2）, respectively, and that the carrier mobilities measured at five different areas are similar. Compared to the hydrogen-plasma-treated specimen, the thermally hydrogenated specimen exhibits a lower surface conductivity, a carrier density one order of magnitude lower, and a carrier mobility that varies from 2 to 33 cm^2·V^（-1）·s^（-1）. The activated hydrogen atoms restructure the diamond surface, remove the scratches, and passivate the surface states via the etching effect during the hydrogen plasma treatment process, which maintains a higher carrier density and a more stable carrier mobility.

关键词： H-termination diamond film surface conductivity carrier mobility plasma treatment

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Alloy anodes for sodium-ion batteries

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Rare Metals 2021年第2期40卷 272-289页

作者： Shu-Min Zheng Yan-Ru Tian Ya-Xia liu Shuang Wang Chao-Quan Hu Bao Wang Kai-ming Wang State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China Nanjing IPE(Institute of Process Engineering)Institute of Green Manufacturing Industry Nanjing211135China School of Fashion Beijing Institute of Fashion TechnologyBeijing100029China School of Science University of Science and Technology LiaoningAnshan114051China

Sodium-ion batteries(SIBs)have emerged as one of the most promising candidates for next-generation energy storage systems because sodium is abundant in *** practical application of SIBs critically depends on developing robust electrode materials with high specific capacity and long cycling life,developing suitable anode materials is even more ***-type anodes are attractive for their high gravimetric and volumetric specific capacities,demonstrating great potential for high-energy SIBs,however,huge volume swelling hampered their practical *** the encouraging breakthroughs on alloy anodes for SIBs,herein,we present a review of the up-to-date progress and works carried out with alloy-based anode materials for *** review the synthetic strategies and their detailed electrochemical *** particular,we extensively reveal the important roles of alloy-based anodes in the development of *** progress of alloy-type anodes and their compounds for sodium storage is *** efforts to enhance the electrochemical performance of the alloy-based anode materials are ***,we proposed multi-component alloys/high-entropy alloys(HEAs)as further research directions for alloy-based anodes.

关键词： Alloy-based anodes High-entropy alloy Multi-component alloy Sodium-ion battery

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Photometric investigations on two totally eclipsing contact binaries:V342 UMa and V509 Cam

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Research in Astronomy and Astrophysics 2019年第10期19卷 75-86页

作者： Kai Li Qi-Qi Xia Jin-Zhong liu Yu Zhang Xing Gao Shao-ming Hu Di-Fu Guo Xu Chen Yuan liu Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space Sciences Shandong University Weihai 264209 China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences Kunming 650216 China Xinjiang Astronomical Observatory Chinese Academy of Sciences Urumqi 830011 China Qilu Institute of Technology Jinan 250200 China

By analyzing two sets of complete BV Rc Ic light curves for V342 UMa and three sets of complete BV Rc Ic light curves for V509 Cam, we determined that the two systems are both W-subtype contact binaries and that V342 UMa manifests a shallow contact configuration, while V509 Cam exhibits a medium contact configuration. Given that both of them are totally eclipsing binaries, the physical parameters derived only by the photometric light curves are reliable. Meanwhile, the period changes of the two targets were analyzed based on all available eclipsing times. We discovered that V342 UMa shows long-term period decrease with a rate of-1.02(±0.54)× 10^-7 d yr^-1 and that V509 Cam displays long-term period increase with a rate of 3.96(±0.90)× 10^-8 d yr^-1. Both the conservative mass transfer and angular momentum loss via magnetic stellar winds can be used to interpret the long-term period decrease of V342 UMa. The longterm period increase of V509 Cam can be explained by mass transfer from the less massive star to the more massive one. The absolute parameters of the two binaries were estimated according to their Gaia distances and our derived photometric solution results. This method can be extended to other contact binaries without radial velocities but with reliable photometric solutions. Their evolutionary states were investigated and we found that they reveal properties that are identical to other W-subtype contact systems.

关键词： stars binaries close-stars eclipsing-stars individual (V342UMa, V509Cam)

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Transcriptome analysis reveals the effects of alkali stress on root system architecture and endogenous hormones in apple rootstocks

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Journal of Integrative Agriculture 2019年第10期18卷 2264-2271页

作者： liu Xuan LIANG Wei LI Yu-xing LI ming-jun MA Bai-quan liu Chang-hai MA Feng-wang LI Cui-ying State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple College of Horticulture Northwest A&F University

Soil alkalinity is a major factor that restricts the growth of apple *** analyze the response of apple roots to alkali stress, the root structure and endogenous hormones of two apple rootstocks, Malus prunifolia (alkali-tolerant) and Malus hupehensis (alkali-sensitive), were compared. To understand alkali tolerance of M. prunifolia at the molecular level, transcriptome analysis was performed. When plants were cultured in alkaline conditions for 15 d, the root growth of M. hupehensis with weak alkali tolerance decreased significantly. Analysis of endogenous hormone levels showed that the concentrations of indole-3-acetic acid (IAA) and zeatin riboside (ZR) in M. hupehensis under alkali stress were lower than those in the control. However, the trend for IAA and ZR in M. prunifolia was the opposite. The concentration of abscisic acid (ABA) in the roots of the two apple rootstocks under alkali stress increased, but the concentration of ABA in the roots of M. prunifolia was higher than that in M. hupehensis. The expression of IAA-related genes ARF5, GH3.6, SAUR36, and SAUR32 and the Cytokinin (CTK)-related gene IPT5 in M. prunifolia was higher than those in the control, but the expression of these genes in M. hupehensis was lower than those in the control. The expression of ABA-related genes CIPK1 and AHK1 increased in the two apple rootstocks under alkali stress, but the expression of CIPK1 and AHK1 in M. prunifolia was higher than in M. hupehensis. These results demonstrated that under alkali stress, the increase of IAA, ZR, and ABA in roots and the increase of the expression of related genes promoted the growth of roots and improved the alkali tolerance of apple rootstocks.

关键词： alkali stress apple rootstock endogenous hormone root architecture transcriptome analysis

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Experimental and Density Functional Theory Calculation Studies on Raman and Infrared Spectra of 1,1＇-Binaphthyl-2,2＇-diamine

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Chinese Journal of Chemical Physics 2017年第1期30卷 7-15,I0001页

作者： Zhen-lin Zhang Wen-lou Wang Shi-lin liu Dong-ming Chen Department of Chemical Physics University of Science and Technology of China Hefei 230026 China National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China

The IR absorption, visible excited normal Raman, and UV-excited near-resonant Raman （UVRR） spectra of 1,1＇-binaphthyl-2,2＇-diamine （BINAM） were measured and analyzed. Density functional theory calculations were carried out to investigate its vibrational frequencies, infrared absorption, normal Raman, and near-resonance Raman intensities. The observed Raman and IR bands of BINAM were assigned with respect to the local vibrations of substituted 2-naphthylamine. Several Raman bands of BINAM were found selectively enhanced in the UVRR in comparison with the normal Raman spectrum. Possible excited state geometry distortion was discussed based on the resonance Raman intensity analysis.

关键词： 1,1'-Binaphthyl-2,2'-diamine Resonance Raman Infrared Density functional theory Molecular vibrations

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可溶性油类和溶解性有机物对砂加载混凝沉淀处理高悬浮矿井水效果的影响

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科学技术与工程 2024年第22期24卷 9316-9323页

作者：王雨晨邸卫猛虎晓龙宋喜东郝春明刘硕中煤(北京)环保股份有限公司北京100071 国家能源集团宁夏煤业有限责任公司灵新煤矿灵武751400 华北科技学院化工安全学院三河065201 河北省地质环境监测院石家庄050011

矿井水中可溶性油类和溶解性有机物含量对石英砂加载混凝沉淀效果的影响很少有系统的研究,影响机制也不清晰。为此,选用石英砂加载混凝处理高悬浮矿井水为研究对象,分析矿井水中乳化油、浓缩液、腐殖酸(humic acid,HA)、富里酸(fulvic a... 详细信息

矿井水中可溶性油类和溶解性有机物含量对石英砂加载混凝沉淀效果的影响很少有系统的研究,影响机制也不清晰。为此,选用石英砂加载混凝处理高悬浮矿井水为研究对象,分析矿井水中乳化油、浓缩液、腐殖酸(humic acid,HA)、富里酸(fulvic acid,FA)和L-色氨酸(L-tryptophan,LA)含量对石英砂加载混凝处理高悬浮物矿井水效率的影响。分析结果表明:矿井水中乳化油、浓缩液和过量的HA含量不利于加载混凝沉淀处理的效率和沉淀速率。HA、LA和适量的FA含量并不能影响加载混凝沉淀处理高悬浮物矿井水的效率和沉降速率。响应面分析结果表明乳化油和浓缩液的浓度变化对砂加载混凝沉淀效率和过程的影响较大,而HA、FA和LA的浓度变化则对其影响较小。该结果为进一步认知砂加载混凝处理工艺,提升其处理效率,实现中国煤矿矿井水资源保护和合理化利用具有重要的意义。

关键词：乳化油浓缩液腐殖酸黄腐酸 L-色氨酸混凝沉淀

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蔡炳勤教授论重症急性胰腺炎的“膜原-三焦-卫气营血”病机轴

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四川中医 2024年第3期42卷 17-20页

作者：何宜斌陈桂豪刘明蔡炳勤钟小生广州中医药大学第二附属医院(广东省中医院)胰腺中心广东广州510120

重症急性胰腺炎的治疗目前采用多学科综合治疗及护理模式,其中中医药在重症急性胰腺炎的不同病程阶段都发挥了积极的治疗作用。广东省名中医蔡炳勤教授在长期治疗重症急性胰腺炎的临床实践中,提出分“期”分“机”治疗原则,将其发病机... 详细信息

重症急性胰腺炎的治疗目前采用多学科综合治疗及护理模式,其中中医药在重症急性胰腺炎的不同病程阶段都发挥了积极的治疗作用。广东省名中医蔡炳勤教授在长期治疗重症急性胰腺炎的临床实践中,提出分“期”分“机”治疗原则,将其发病机理概况为“膜原-三焦-卫气营血”病机轴,为构建重症急性胰腺炎中医药治疗的“理法方药”体系奠定理论基础。

关键词：重症急性胰腺炎分“期”分“机”治疗膜原-三焦-卫气营血病机轴

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