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Thermodynamic Analyses of Strain-induced Martensite Transformation in Fe-7Mn-1.2C Alloy

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Journal of Materials Science & Technology 2000年第4期16卷 449-451页

作者： Xie, JP Zhu, YM wang, xy Luoyang Inst Technol Grad Div Luoyang 471039 Peoples R China

The M-s temperature, Delta G(gamma-->alpha), Delta G(gamma-->M) and mechanical energy under a non-severe impact loading in a medium manganese steel (Fe-7Mn-1.2C) have been calculated by means of Xu's Fe-X-C model. The relation between the yield strength of austenite and the driving force for martensite transformation has been established. It is proved that the martensite transformation can take place in a medium manganese steel (Fe-7Mn-1.2C alloy) under a non-severe impact loading.

关键词： martensite transformation manganese steel impact loading the driving force mechanical energy Ms temperature strength of

RELIABILITY ANALYSIS OF FRP LAMINATED PLATES WITH CONSIDERATION OF BOTH INITIAL IMPERFECTION AND FAILURE SEQUENCE

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Acta Mechanica Solida Sinica 2002年第3期15卷 227-235页

作者： Chen, JQ wang, xy Luo, C Huazhong Univ Sci & Technol Dept Mech Wuhan 430074 Peoples R China

A probabilistic progressive failure analyzing method is applied to estimating the reliability of a simply supported laminated composite plate with an initial imperfection under bi-axial compression load. The initial imperfection and the strength parameters are considered as random variables. Ply-level failure probability is evaluated by the first order reliability method (FORM) together with the Tsai-Wu strength criterion and Tan criterion. Current stresses in the laminated structure are calculated by the classical lamination theory with the stiffness modified based on the last step ply failure. Probabilistically dominant ply-level failure sequences leading to overall system failure are identified, based on which the system failure probability is estimated. A numerical example is presented to demonstrate the methodology proposed. Through parameter studies it is shown that the deviation of the initial imperfection and some of the strength parameters largely influence the system reliability.

关键词： failure sequences initial imperfection laminated-plates structural reliability first order reliability method (FORM) strength criterion

EFFECT OF ELECTROLESS PLATING COBALT UPON CHARACTERISTICS OF NICKEL HYDROXIDE ELECTRODEFORRECHARGEABLEALKALINEBATTERIES

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中国有色金属学会会刊：英文版 1998年第4期8卷 135-141页

作者： wang, xy Zhang, YS Yan, J Yuan, HT Song, DY Nankai Univ Inst New Energy Mat Chem Tianjin 300071 Peoples R China

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ＩＮＴＲＯＤＵＣＴＩＯＮＮｉｃｋｅｌｈｙｄｒｏｘｉｄｅｅｌｅｃｔｒｏｄｅｓｈａｖｅｂｅｅｎｗｉｄｅｌｙｕｓｅｄａｓｐｏｓｉｔｉｖｅｅｌｅｃｔｒｏｄｅｉｎＮｉＣｄ，ＮｉＨ２ａｎｄＮｉＭＨｓｅｃｏｎｄａｒｙｂａｔｅｒｉｅｓ．Ｉｍｐｒｏｖｅｍｅｎｔ...

关键词： nickel hydroxide electrode electroless plating cobalt electrode performance electrochemical impedance conductivity

Spectroscopic studies on interaction of hemoglobin and serum albumin with nicotine

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Chinese Science Bulletin 2002年第7期47卷 538-542页

作者： wang, HF wang, Y Cheng, Y Sun, HF wang, xy Liu, YF Peking Univ Coll Chem & Mol Engn Dept Appl Chem Beijing 100871 Peoples R China

The interactions of nicotine and Hb/SA were studied in vitro by UV/Vis, fluorescence, 1H NMR and FT-IR spectroscopies. The UV/Vis absorbance of Hb/SA (200nm) shifted to red and decreased gradually with the addition of nicotine, indicating that the protein conformational change resulted from the chemical interaction. With increasing nicotine concentration, incubation of SA with nicotine caused the quenching of fluorescence typical of protein tryptophan residues, which meant that the vicinity of the tryptophan residues of SA was changed because of nicotine. FT-IR spectra showed that α-helix component of Hb/SA decreased, turn and β-structure components of Hb/SA increased in the presence of nicotine. In the 1H NMR spectra of nicotine, all proton peaks on pyrrolidinyl ring moved to downfield and the resonance emanating from nicotine was preferentially broadened while the concentration of Hb/SA increased. All these results indicate that nicotine and Hb/SA in vitro interact on each other, forming a new

关键词： hemoglobin (Hb) serum albumin (SA) nicotine spec-troscopic studies.

Giant magneto-impedance effects in nanocrystalline soft magnetic alloy ribbons

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Chinese Science Bulletin 1997年第12期42卷 1049-1052页

作者： Ku, WJ Ge, FD Yan, G wang, xy Zhu, J Central Iron and Steel Research Institute Beijing Department of Materials Science and Engineering Tsinghua University Beijing China

SINCE the discovery of the giant magneto-impedance (GMI) effects in amorphous wire (or rib-bon) of CoFeSiB and nanocrystalline wire (or film) of FeCuNbSiB, it has attracted greatattention due to its promising potential applications in industry. Amorphous (and nanocrys-talline) soft magnetic alloys have very large magnetic permeability, when an ac driving currentand an external magnetic field (EMF) are applied, the EMF will damp the magnetic fluxchange caused by the ac driving current, thus the magnetic permeability will decrease; as a re-

关键词： giant magneto-impedance effects (GMI) magnetic permeability penetration depth nanocrystalline soft magnetic alloy ribbon.

Efficacies of β-L-D4A against Hepatitis B virus in 2.2.15 cells

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World Journal of Gastroenterology 2008年第8期14卷 1263-1267页

作者： Lin-Lin Gao, Xiao-Yan wang, Ju-Sheng Lin, Ying-Hui Zhang, Yan Li, Institute of Liver Diseases, Tongji Hospital, Tongii Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China Author contributions:Gao LL and wang xy contributed equally to this work Gao LL, wang xy, Lin JS, Zhang YH, Li Y designed the research Gao LL and wang xy performed the research Gao LL wrote the paper Institute of Liver Diseases Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 Hubei Province China.

AIM： To investigate the antiviral effect of beta-L- enantiomer of 2;3＇-didehydro-2＇,3″-dideoxyadenosine （13-L-D4A） on 2.2.15 cells transfected with the hepatitis B virus （HBV） genome.METHODS： Lamivudine （3TC） as a positive control. Then, HBV DNA in treated 2.2.15 cells and the Hepatitis B surface antigen （HBsAg） in the culture supernatants were detected to determine the inhibitory effect of β-L- D4A. At the same time, 3-（4,5-dimethylthiazol-2-yl）-2,5- diphenyltetrazolium bromide （MTT） was used to detect the survival ratio of 2.2.15 cells.RESULTS： β-L-D4A has a dose-dependent inhibitory effect on HBV DNA replication; this effect was apparent when the concentration was above 1 mol/L. When β-L- D4A was at the highest concentration, 100 mol/L, the HBsAg inhibition ratio was above 50%. The Therapeutic index （TI） of β-L-D4A was above 2.1.CONCLUSION： β-L-D4A has a dose-dependent inhibitory effect on the replication of HBV DNA and the secretion of HBsAg at low toxicity,

关键词： 2 3'-didehydro-2 3'-dideoxyadenosine 2.2.15 cells Hepatitis B virus DNA Hepatitis B surface antigen

Lipopolysaccharide decreasing albumin expression in rat hepatocytes

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Hepatobiliary & Pancreatic Diseases International 2005年第3期4卷 410-415页

作者： Research Institute of General Surgery, Jinling Hospital, Nanjing 210002, China (wang xy, Li WQ, Li N and Li JS) and Department of Orthopaedics, Zhongda Hospital, Nanjing 210009, China (Lu J) Research Institute of General Surgery Jinling Hospital Nanjing 210002 China. wxinying@***

The relations of the severity of hypoalbu-minemia to morbidity and mortality of patients with critical illness illustrate the need for better understanding of molecular mechanism of hypoalbuminemia. This study was undertaken to investigate the response of albumin synthesis to lipopolysaccharide(LPS)in rat hepatocytes in vitro in early acute phase of sepsis. METHODS:Hepatocytes were cultured at an initial cell density of 1.5×106 cells/well in 3 ml culture medium. There were two groups of samples which received either normal saline or 1 μg/L LPS randomly. Albumin mRNA in hepatocytes was assessed by reverse transcription-poly-merase chain reaction(RT-PCR) and albumin level in the supernatant was measured by ELISA at 0,2,8,12,24 hours after exposure. Meanwhile, the albumin precursor was evaluated at the same time points by flow cytometry. RESULTS:The quantitative changes of mRNA, albumin precursor and its protein were analogous. All of them tended to decline at 12 hours post-treatment and did not decrease significantly until 24 hours after LPS exposure. Meanwhile, albumin mRNA decreased about 30% and the levels of albumin precursor and albumin reduced approximately 50%. CONCLUSIONS: LPS can inhibit albumin synthesis in rat hepatocytes by prevention of albumin transcription. Moreover, the response of hepatic albumin synthesis to LPS changes with the stage of sepsis process. The results show that albumin metabolism in sepsis is a complicated process and further studies are required to understand the molecular mechanism of LPS-induced hypoalbuminemia in sepsis.

关键词： lipopolysaccharide hepatocyte albumin hypoalbuminemia signal transduction sepsis

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经皮电离子中药导入治疗闭合性软组织损伤

中国组织工程研究与临床康复 2007年第9期11卷 1746-1749页

作者：代颖汪晓阳山西大学体育学院山西省太原市030006

目的:探讨中药离子导入治疗闭合性软组织损伤的有效性和安全性。资料来源:应用计算机检索Elsevier SDOL数据库1985/2006与中药离子导入治疗闭合性软组织损伤相关文章,检索词“traditional Chinese medicine ion-introduction,closed sof... 详细信息

目的:探讨中药离子导入治疗闭合性软组织损伤的有效性和安全性。资料来源:应用计算机检索Elsevier SDOL数据库1985/2006与中药离子导入治疗闭合性软组织损伤相关文章,检索词“traditional Chinese medicine ion-introduction,closed soft tissue injury”,并限定文章语言种类为“English”。同时用计算机检索CNKI数据库1994/2006的相关文章,限定文章语言种类为中文,检索词“中药离子导入,闭合性软组织损伤”。资料选择:对资料进行初审,选取试验采用中药离子导入方法治疗闭合性软组织损伤的文献,及与经皮离子导入中药的相关文献。无论是否随机对照均纳入,排除陈旧和综述类文献。资料提炼:纳入30篇符合标准的文献,其中9篇介绍电离子导入的原理和特点,6篇关于导入所用的中药,16篇是临床应用报告。资料综合:所收集资料中的试验包括4265例患者,均采用中药离子导入法治疗闭合性软组织损伤,对其结果予以评价。常用的中药有活血药、理气药、补肝肾续筋骨药、祛风寒湿药和清热药等,其治愈率约为52.6%,显效率约为35.8%。结论:中药电离子导入治疗闭合性软组织损伤已经广泛应用于临床,但是基础研究不足,中药起作用的成分不十分明确,需进一步研究。

关键词：电离子导入中草药闭合性软组织损伤

高等学校在读硕士研究生超重与肥胖的现状及其影响因素

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中国组织工程研究与临床康复 2007年第17期11卷 3225-3227,3233页

作者：于芳付奕汪晓阳中北大学体育与艺术学院山西省太原市030051 山西大学体育学院山西省太原市030051

目的:了解高等学校在读硕士研究生超重与肥胖的现状,并分析其影响因素。方法:2005-05对中北大学、山西大学2002～2004级硕士研究生进行调查,共计832人,其中男生328人,女生504人,年龄20～34岁,平均(26.0±3.0)岁。采用体质测试法获取体... 详细信息

目的:了解高等学校在读硕士研究生超重与肥胖的现状,并分析其影响因素。方法:2005-05对中北大学、山西大学2002～2004级硕士研究生进行调查,共计832人,其中男生328人,女生504人,年龄20～34岁,平均(26.0±3.0)岁。采用体质测试法获取体质量、身高数据,计算体质量指数。以体质量指数<18.5kg/m2为过轻,≥18.5kg/m2但<23kg/m2为标准体质量,≥23kg/m2但<25kg/m2为超重,≥25kg/m2但<30kg/m2为肥胖Ⅰ度,≥30kg/m2为肥胖Ⅱ度。同时问卷调查获得研究生个人基本情况。结果:①研究生体质量指数的中位数为21.26kg/m2,分布呈现“细峰右尾”型,存在相当数量的超重、肥胖人数。②性别间比较,男生超重率高于女生(25.0%,9.3%,χ2=37.776,P<0.01);男生肥胖率也显著高于女生(25.30%,5.56%,χ2=67.031,P<0.01)。③不同年龄间比较,男生超重率随年龄的增长有逐步下降的趋势,在30～34岁达到最低(21.57%),各年龄组间不存在显著性差异;男生肥胖率随年龄增加而迅速上升,在30～34岁达到最高(49.01%),分别是20～24岁、25～29岁的3.39,2.10倍,各组间差异有显著性意义(P<0.01)。女生超重率随年龄的增长有逐步上升的趋势,在30～34岁达到最高(15.38%),但各年龄组间差异不显著;女生肥胖率随年龄增长而增长,各组间存在显著性差异。④超重、肥胖的影响因素主要为性别、年龄、遗传、运动缺乏、饮食结构不良、不良生活方式。结论:①研究生体质量指数总体上处于良好状态,但仍存在着相当数量的超重或肥胖的人数。②男生超重、肥胖形势较女生更为严峻。③除了性别、年龄等生理因素以外,遗传因素、运动不足、饮食结构不良、不良生活方式、精神因素也是造成研究生超重、肥胖的主要危险因素。

关键词：教育研究生体重肥胖症身高