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Tribological Behavior of Magnesium Alloy by Composite Treatment

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稀有金属材料与工程 2011年第S3期40卷 290-293页

作者： zheng shunqi1, zhang gaohui2, huang guoqing2, xu peng2, Li Gen2 1 Ningbo Branch of china Academy of Ordnance Science, Ningbo 315103, china 2 china jiliang university, hangzhou 310018, china china Acad Ordnance Sci Ningbo Branch Ningbo 315103 Zhejiang Peoples R China china jiliang Univ Hangzhou 310018 Zhejiang Peoples R China

A compact and homogeneous composite membranous layer was coated on the surface of AZ31 magnesium alloy by a multiple treatment of micro-arc oxidation, magnetron sputtering, and ion implantation in order to improve the wear-resistance performance and micro-arc oxidation surface of the magnesium alloy. X-ray diffraction (XRD) and metallurgical microscopy as well as scanning electron microscopy (SEM) were used to identify the phases structures of the coating and worn surface. The dry sliding wear behavior of the composite membranous layer was performed on WTM-2E tribological and wear tester. The results show that the ceramic coating formed by micro-arc oxidation is not uniform, and lots of holes can be founded on the surface. While a uniform composite membranous layer with TiN can be formed on the surface of the magnesium alloy by the multiple treatment technology, and the porosity of this layer is also reduced. And the multiply treated sample shows good anti-wear performance in dry sliding against the steel, the width of the wear trace is 227.5767 μm which is only 66% of the micro-arc oxidation one as the sliding distance reaches 175 m.

关键词： magnesium alloy micro-arc oxidation multiple treatment sliding wear

Efficient Polytelluride Anchoring for Ultralong-Life Potassium Storage: Combined Physical Barrier and Chemisorption in Nanogrid-in-Nanofiber

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Nano-Micro Letters 2024年第4期16卷 364-378页

作者： Qinghua Li Dandan Yu Jian peng Wei zhang Jianlian huang Zhixin Liang Junling Wang Zeyu Lin Shiyun Xiong Jiazhao Wang Shaoming huang Guangzhou Key Laboratory of Low‑Dimensional Materials and Energy Storage Devices School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006People’s Republic of China College of Materials and Chemistry China Jiliang UniversityHangzhou 310018People’s Republic of China Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongInnovation CampusSquires WayNorth WollongongNSW 2522Australia

Metal tellurides(MTes) are highly attractive as promising anodes for high-performance potassium-ion batteries. The capacity attenuation of most reported MTe anodes is attributed to their poor electrical conductivity and large volume variation. The evolution mechanisms, dissolution properties, and corresponding manipulation strategies of intermediates(K-polytellurides, K-pTe_(x)) are rarely mentioned. Herein,we propose a novel structural engineering strategy to confine ultrafine CoTe_(2) nanodots in hierarchical nanogrid-in-nanofiber carbon substrates(CoTe_(2)@NC@NSPCNFs) for smooth immobilization of K-pTe_(x) and highly reversible conversion of CoTe_(2) by manipulating the intense electrochemical reaction process. Various in situ/ex situ techniques and density functional theory calculations have been performed to clarify the formation, transformation, and dissolution of K-pTe_(x)(K_(5)Te_(3) and K_(2)Te), as well as verifying the robust physical barrier and the strong chemisorption of K_(5)Te_(3) and K_(2)Te on S, N co-doped dual-type carbon substrates. Additionally, the hierarchical nanogrid-in-nanofiber nanostructure increases the chemical anchoring sites for K-pTe_(x), provides sufficient volume buffer space, and constructs highly interconnected conductive microcircuits, further propelling the battery reaction to new heights(3500 cycles at 2.0 A g^(-1)). Furthermore, the full cells further demonstrate the potential for practical applications. This work provides new insights into manipulating K-pTe_(x) in the design of ultralong-cycling MTe anodes for advanced PIBs.

关键词： Polytelluride dissolution Nanogrid-in-nanofiber structure Physicochemical adsorption Reaction mechanism Ultralonglife potassium storage

The properties of halo structure for ^(17)B

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Science china(Physics,Mechanics & Astronomy) 2008年第7期51卷 781-787页

作者： HU zhengGuo1, WANG Meng1, xu HuShan1, SUN ZhiYu1, WANG JianSong1, XIAO guoqing1, ZHAN WenLong1, XIAO ZhiGang1, MAO RuiShi1,2, LI Chen1, zhang xueYing1,2, zhang HongBin1, ZHAO TieCheng1, xu ZhiGuo1, WANG Yue1,2, CHEN RuoFu1,2, huang TianHeng1,2, FU Fen1,2, GAO Qi1,2, HAN JianLong1,2, zhang xueHeng1,2, zheng Chuan1,2, YU YuHong1,2 & GUO ZhongYan1 1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, china 2 Graduate university of the Chinese Academy of Sciences, Beijing 100049, china 1. Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China 2. Graduate university of the Chinese Academy of Sciences Beijing 100049 China

The total reaction cross section (1724±93 mb) of 17B at the energy of 43.7 A MeV on C target has been measured by using the transmission method at the Radioactive Ion Beam Line in Lanzhou (RIBLL). Assuming 17B consists of a core 15B plus two halo neutrons,the total cross section of 17B on C target was calculated with the zero-range Glauber model,where double Gaussian density distributions and Gaussian plus HO density distributions were used. It can fit the experimental data very well. The characteristic of halo structure for 17B was found with a large diffusion of the neutrons density distribution.

关键词： total cross section density distribution Glauber model the characteristic of halo structure

Cascade Two-photon Correlated-emission Optical Bistability

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Chinese Journal of Lasers 1998年第4期 26-33页

作者： huang Hongbin 1,2 SONG jiliang 3 WEI Jiang 2 zhang Xiaolan 2 LU Hüi 2 ( 1 CCAST (World Laboratory), P.O.Box 8730, Beijing 100080, china 2 Department of Physics, Southeast university, Nanjing 210096, china 3 Department

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｔｈｅｓｔｕｄｉｅｓｏｆｔｈｅｇｅｎｅｒａｔｉｏｎｏｆｔｈｅｓｑｕｅｚｅｄｓｔａｔｅｓｏｆｌｉｇｈｔａｎｄｔｈｅｉｒｐｒｏｐｅｒｔｉｅｓ，ｔｗｏｐｈｏｔｏｎｔｒａｎｓｉｔｉｏｎｐｒｏｃ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｔｈｅｓｔｕｄｉｅｓｏｆｔｈｅｇｅｎｅｒａｔｉｏｎｏｆｔｈｅｓｑｕｅｚｅｄｓｔａｔｅｓｏｆｌｉｇｈｔａｎｄｔｈｅｉｒｐｒｏｐｅｒｔｉｅｓ，ｔｗｏｐｈｏｔｏｎｔｒａｎｓｉｔｉｏｎｐｒｏｃｅｓｅｓｈａｖｅｒｅｃｉｅｖｅｄｇ...

关键词： two photon optical bistability atomic coherences phase and photon number squeezing

水体中痕量挥发性有机物单体碳同位素组成分析

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色谱 2004年第4期22卷 439-441页

作者：刘国卿张干黄世卿彭先芝陈鸿汉中国科学院广州地球化学研究所有机地球化学国家重点实验室广东广州510640 长沙航空职业技术学院湖南长沙410014 中国地质大学(北京)环境科学院北京100083

将固相微萃取 (SPME)技术与冷阱富集系统相结合 ,对水体中痕量挥发性有机物进行了单体碳同位素分析 ,方法检测限较常规SPME提高了一个数量级。在优化的条件下 ,对 2 0 μg/L的三氯乙烯 /四氯乙烯和 10 μg/L的苯/甲苯水溶液进行了单体... 详细信息

将固相微萃取 (SPME)技术与冷阱富集系统相结合 ,对水体中痕量挥发性有机物进行了单体碳同位素分析 ,方法检测限较常规SPME提高了一个数量级。在优化的条件下 ,对 2 0 μg/L的三氯乙烯 /四氯乙烯和 10 μg/L的苯/甲苯水溶液进行了单体碳同位素分析 ,相比于纯溶剂 (液相 )碳同位素值 ,顶空 (气相 )同位素分析误差不超过0 5‰ ,而样本标准偏差为 0 3‰。对某受四氯乙烯污染的北京地下水进行了同位素测定 ,近污染源点 (B4 0 8)与远污染源点 (B2 30 )四氯乙烯的碳同位素值 (δ13 C)分别为 - 37 8‰和 - 34 4 5‰ ,δ13 C变重表明四氯乙烯在地下水中可能发生生物降解或化学反应过程。通过比较不同厂家的苯、甲苯、三氯乙烯和四氯乙烯的δ13 C发现 ,同一试剂不同厂家的δ13 C存在明显差异。该法简单、灵敏度高 ,适用于水体中痕量挥发性有机污染物的同位素组成测定。

关键词：单体同位素分析固相微萃取冷阱挥发性有机物地下水

单细胞转录组测序在病原微生物肺部感染研究中的应用

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中国病理生理杂志 2024年第5期40卷 950-955页

作者：黄佳佳王楚雯刘颖张莹莹陈染钱国清宁波大学附属第一医院浙江宁波315000 温州医科大学慈溪生物医药研究院浙江宁波315000

肺部感染是指在终末气道、肺泡腔及肺间质中由细菌、真菌和病毒等病原体诱发的炎症,是威胁人类健康的全球十大问题之一。2019年,世界卫生组织数据显示肺部感染致全球近260万死亡,位列第四大死因^([1]),而且,成人肺部感染的发作次数呈上... 详细信息

肺部感染是指在终末气道、肺泡腔及肺间质中由细菌、真菌和病毒等病原体诱发的炎症,是威胁人类健康的全球十大问题之一。2019年,世界卫生组织数据显示肺部感染致全球近260万死亡,位列第四大死因^([1]),而且,成人肺部感染的发作次数呈上升趋势,特别是≥70岁的男性患者数量增幅最为显著^([2])。病原微生物的感染是病原体与免疫相互作用的结果,不同病原体引起的肺部感染作用机制不同,感染的病原体可激活免疫信号通路和诱导炎症风暴,诱发急性呼吸窘迫综合征(acute respiratory distress syndrome,ARDS)^([3]),导致预后不佳,甚至死亡。

关键词：单细胞转录组测序肺部感染病原微生物

Suppression of Colorectal Cancer Growth by a Novel Adeno-associated Virus Vector-mediated IFN-β through Targeting the Telomerase Activity in vivo

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Suppression of Colorectal Cancer Growth by a Novel Adeno-ass...

塞拉利昂近海黄条[鱼予]基础生物学特征研究

华东六省一市生物化学与分子生物学会2008年学术交流会

作者： Yigang Wang~1 Lingfeng He~(1,2) Fang huang~1 1 Kangjiang zhang~1 Gongchu Li~1 guoqing He~1 Xinyuan Liu~(1,2) (1 Xinyuan Institute of Medicine and Biotechnology,College of Life Science,Zhejiang Sci-Tech university 2 Institute of Biochemistry and Cell Biology,Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences,Shanghai 200031,china.)

Although the antiviral actions of interferons(IFNs)are fast observed,up to date,Type I IFNs(α/β)protein have been widely used as a clinical anticancer agent due to their antiproliferative effects via induction of apoptosis,activation of antitumor immunity and inhibition of angiogenesis ***,there are some limitations in antitumoral clinical trials of type I IFNs such as short halt-life and systemic toxicity at high ***-associated virus (AAV)has rapidly become a promising gene delivery vehicle for its excellent advantage of nonimmunogenic,low pathogenicity and long-term gene ***,lack of tissue specificity caused low efficiency of AAV transfer to target *** application of human telomerase reverse transcriptase(hTERT)promoter is a good targeting strategy for AAV in cancer gene therapy as hTERT is transcriptionally upregulated in most cancer ***,hTERT promoter becomes a prior candidate to improve the targeting of *** present work,a novel tumor targeting AAV harbouring IFN-βgene under the control of hTERT promoter(AAV-hTERT-IFN-β) was ***-βexpression was observed in tumor cells infected with AAV-hTERT-IFN-βAAV-hTERT-IFN-βdisplayed cancer-specific cytotoxicity and induced tumor cell apoptosis via activation of caspase pathway and release of cytochrome ***,in animal experiments, administration of AAV-hTERT-IFN-βsignificantly suppressed the growth of colorectal cancer xenograft and resulted in tumor cells *** data suggested that AAVs in combination with hTERT-mediated IFN-βexpression could exert potential antitumor activity and provide a novel targeting approach to cancer therapy.

关键词： Type I IFNs(α/β) Adeno-associated virus hTERT promoter antitumor efficacy

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渔业科学进展 2024年第5期45卷 109-118页

作者：张港琛赵国庆黄洪亮李灵智中国水产科学研究院东海水产研究所、农业农村部远洋与极地渔业创新重点实验室上海200090 上海海洋大学海洋科学学院上海201306

黄条[鱼予](Sphyraena guachancho)是塞拉利昂近海重要的经济鱼种,为全面了解其基础生物学特征,本研究根据2019-2021年共6个科学调查航次(9月、10月、12月、1月、4月和5月)采样的2 135尾黄条[鱼予]样品,对其体长和体质量组成及关系、性... 详细信息

黄条[鱼予](Sphyraena guachancho)是塞拉利昂近海重要的经济鱼种,为全面了解其基础生物学特征,本研究根据2019-2021年共6个科学调查航次(9月、10月、12月、1月、4月和5月)采样的2 135尾黄条[鱼予]样品,对其体长和体质量组成及关系、性比、性腺成熟度、初次性成熟体长、摄食等级和肥满度等基础生物学特征进行了研究。结果显示,黄条[鱼予]体长范围为50~845 mm,优势组为175~345 mm(占比74.52%);体质量范围为0.9~4 000.8 g,优势组为25~225 g(占比71.33%)。体长-体质量关系式为W=3.339×10^(-5)L^(2.758),呈负向异速生长。雌雄比例为0.56:1,雄性明显多于雌性。性腺成熟度以Ⅱ期和Ⅲ期为主,Ⅴ期和Ⅵ期个体占比均较少。雌雄初次性成熟体长分别为(269.982±2.340) mm、(259.846±3.397) mm。摄食等级以0级为主,随体长增加,空胃比例基本呈逐渐增大的趋势,繁殖个体的摄食强度较低。肥满度范围为0.59~1.25,随体长增加,肥满度基本呈先增加后降低的趋势。统计分析结果显示,旱雨季体长、体质量分布呈现明显差异,且在旱季有较多补充群体组成,不同月份黄条[鱼予]体长、体质量分布和体长-体质量关系具有极显著性差异(P1),体长极显著影响性腺成熟度、摄食强度(P1),不同月份性腺成熟度和摄食强度差异性不显著(P>0.05)。本研究丰富了西非塞拉利昂沿岸海域黄条[鱼予]生物学特征资料,可为该海域黄条[鱼予]资源评估、开发利用和资源管理提供科学支撑。

关键词：黄条[鱼予] 塞拉利昂生物学特征初次性成熟体长

New ternary compound La_8Al_(13)Sn_3

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Rare Metals 2009年第5期28卷 491-493页

作者： HE Wei XIA Xiuwen zhang jiliang huang Jinli LIU Yixin Key Laboratory of Nonferrous Metal Materials and New Processing Technology （Ministry of Education） College of Materials Science and Engineering Guangxi University Nanning 530004 China Department of Physics and Electronic Information Science Guangxi Teachers Education University Nanning 530023 China

A new ternary compound La8Al13Sn3 was synthesized and studied by means of X-ray powder diffraction technique. The compound La8Al13Sn3 crystallizes in a hexagonal AlB2-type structure with space group P6/mmm （No. 191） and the lattice parameters a = 0.44919（1） nm and c = 0.43835（1） nm. The Smith and Snyder figure of merit for index, FN, is F30 = 197.3（30）. The Rietveld refinement for the crystal structure of the compound was carried out successfully. The liability R-factors of Rietveld refinement are Rp = 0.114 and Rwp = 0.148. The compound La8Al13Sn3 decomposes into LaAl2 with cubic structure and space group Fd 3m （227）, LaAl3 with hexagonal structure and space group P63/mmc （194）, and Sn at 720°C.

关键词： crystallography X-ray diffraction Reitveld method rare earth compounds