检索结果-南通市图书馆

Protective effect of ginsenoside Rg1 on glutamate-induced lung injury

在线全文

学校读者我要写书评

暂无评论

Acta Pharmacologica Sinica 2007年第3期28卷 392-397页

作者： Li SHEN~2 Jian-zhong HAS~2 Chen LI~2 Shao-jie YUE~3.Yong LIU~2 Xiao-qun QIN~2 Hui-jun LIU~2 Zi-qiang LUO~(3.4)2 Departments of Physiology,Xiangya medical school and3.Neonatology,Xiangya Hospital,central south university,changsha 410078,china Departments of Physiology Xiangya medical school Xiangya Hospital Central South University

Aim:To examine the possible protective effect of ginsenoside Rgl,an activecomponent of ginseng,on lung injury caused by glutamate in ***:Thelungs of mice receiving glutamate(0.5 g/kg)and/or ginsenoside Rg1(0.03.g/kg)via intraperitoneal administration were *** indexes of lung wet weight/body weight ratios(LW/BW),lung wet/dry weight ratios(W/D),heart rate(HR),and breathing rate(BR)were *** activity of nitric oxide synthase(NOS),xanthine oxidase(XOD),superoxide dismutase(SOD),catalase(CAT),thecontent of NO,and malondialdehyde in the lung homogenate were ***:Treatment with glutamate for 2 h increased LW/BW,W/D,HR,and *** changes were nearly abolished by pretreatment with ginsenoside Rgl for3. min before glutamate *** analysis of the lung homogenate demon-strated the protective effect as evidenced by the inhibition of NOS(12%)andXOD(50%)inactivity,the enhanced activity of SOD(20%)and CAT(25%).Conclusion:Ginsenoside Rgl has a potential protective role in lung diseasesassociated with glutamate toxicity.

关键词： ginsenoside Rgl glutamate acute lung injury nitrogen monoxide reactive oxygen species

Effects of Oxalic Acid Addition on the Hydrothermal Synthesis of Kaolinite

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of central south university 2000年第1期12卷 34-36页

作者： LIU Su qin,HUANG Ke long (College of Chemistry and Chemical Engineering, central south university of Technology, changsha 410083. china) 1. College of Chemistry and Chemical Engineering Central South University of Technology 410083 Changsha China

Kaolinite was hydrothermally synthesized from alumina gel and silicate by dissolving alumina gel in oxalic acid before it was mixed with silicate, effects of the amount of addition on the species of synthetic products were discussed. The reaction product was characterized by X ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that analcite is the only phase of the reaction solution without oxalic acid, the proportion of kaolinite in product increases with the amount of addition, and kaolinite is the main species when the molar ratio of oxalic acid to alumina reaches 0.6∶1.0. This is because oxalic acid addition is beneficial to the formation of kaolinite through changing the coordination number of aluminium from four to six, while the mixture of alumina gel, before it was dissolved in oxalic acid with silicate interfered with the crystallization of kaolinite.

关键词： kaolinite hydrothermal synthesis oxalic acid

EVALUATION OF LUBRICANTS FOR COLD ROLLING ALUMINUM STRIPS

在线全文

学校读者我要写书评

暂无评论

Journal of central south university 1997年第1期9卷 65-68页

作者： Sun Jianlin Zhang Xinming(Department of Materials Science and Engineering, central south university ofTechnology, changsha 410083. china) Department of Materials Science and Engineering Central South University of Technology Changsha 410083 China

Various kinds of base oils were applied to cold rolling aluminum strips on a test mill for evaluationof the influences of these base oils,aromatics contents and viscosity of base oils on their lubricating performances and surface reflectivity of rolled strips at annealing. Results showed that low friction coefficient androlling force were obtained by using the normal paraffins,whereas their contaminations on the annealed stripsurface were the same as those of other saturated hydrocarbons. Aromatics in base oil affected the stir face reflectivity of annealed strips, but the decrease of aromatics in base oil was ineffective to improve rolled stripssurface quality when it is less than 1 %. Base oil viscosity has the great influences on the lubricating performances and surface reflectivity of annealed strips just in this condition.

关键词： cold rolling lubricants aluminum strip

ENERGY MANAGEMENT AND CONTROL TECHNOLOGY IN THE NONFERROUS METALS INDUSTRY

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1994年第2期4卷 98-102页

作者： Wu,Min Gui,Weihua(central south university of Technology ,changsha 410083.

ＥＮＥＲＧＹＭＡＮＡＧＥＭＥＮＴＡＮＤＣＯＮＴＲＯＬＴＥＣＨＮＯＬＯＧＹＩＮＴＨＥＮＯＮＦＥＲＲＯＵＳＭＥＴＡＬＳＩＮＤＵＳＴＲＹＥＮＥＲＧＹＭＡＮＡＧＥＭＥＮＴＡＮＤＣＯＮＴＲＯＬＴＥＣＨＮＯＬＯＧＹＩＮＴＨＥＮＯ... 详细信息

ＥＮＥＲＧＹＭＡＮＡＧＥＭＥＮＴＡＮＤＣＯＮＴＲＯＬＴＥＣＨＮＯＬＯＧＹＩＮＴＨＥＮＯＮＦＥＲＲＯＵＳＭＥＴＡＬＳＩＮＤＵＳＴＲＹＥＮＥＲＧＹＭＡＮＡＧＥＭＥＮＴＡＮＤＣＯＮＴＲＯＬＴＥＣＨＮＯＬＯＧＹＩＮＴＨＥＮＯＮＦＥＲＲＯＵＳＭＥＴＡＬＳＩＮＤ...

关键词： energy management and control real-time computer networks

THEORETICAL　ANALYSIS　AND　DESIGN／CALCULATION　FORMULAE　FOR　HYDRAULIC　IMPACT　MECHANISM

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1995年第1期5卷 116-121页

作者： He Qinghua(Department of Mechanical Engineering ,central south university of Technology , changsha 410083.

ＴＨＥＯＲＥＴＩＣＡＬＡＮＡＬＹＳＩＳＡＮＤＤＥＳＩＧＮ／ＣＡＬＣＵＬＡＴＩＯＮ　ＦＯＲＭＵＬＡＥＦＯＲ　ＨＹＤＲＡＵＬＩＣＩＭＰＡＣＴＭＥＣＨＡＮＩＳＭＨｅ；Ｑｉｎｇｈｕａ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃ... 详细信息

ＴＨＥＯＲＥＴＩＣＡＬＡＮＡＬＹＳＩＳＡＮＤＤＥＳＩＧＮ／ＣＡＬＣＵＬＡＴＩＯＮ　ＦＯＲＭＵＬＡＥＦＯＲ　ＨＹＤＲＡＵＬＩＣＩＭＰＡＣＴＭＥＣＨＡＮＩＳＭＨｅ；Ｑｉｎｇｈｕａ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，Ｃｅｎ...

关键词： hydraulic impact mechanism acceleration ratio unretrieved oil

Abnormal gradient microstructure in Cr_3._2 based cemented carbide

在线全文

学校读者我要写书评

暂无评论

Journal of central south university of Technology 2001年第4期8卷 224-227页

作者： ZHANG Li 1,CHEN Shu 2 (1. Powder Metallurgy Factory, central south university, changsha 410083. china 2. changsha Research Institute of Mining and Metallurgy, changsha 410012, china) 1. Powder Metallurgy Factory Central South University 410083 Changsha China 2. changsha Research Institute of Mining and Metallurgy 410012 Changsha China

With OLYMPUS PMG3.metallograph, an abnormal three-layer gradient structure, i. e. coarse grain zone, binder enrichment zone and normal structure zone from surface to inner, was observed in Cr3.2 based cemented carbide. In the binder enrichment zone, three different shapes of anomalous coarse carbides were observed. It is shown that the transverse rupture strength can be raised remarkably, up 20.7%from the alloy with abnormal gradient structure by removing the abnormal gradient structure. The results suggested that the abnormal gradient structure in the surface, especially the anomalous coarse carbides in the binder enrichment zone is the main reason for the lower strength

关键词： Cr3.2 based cermet cemented carbide gradient structure microstructure

KINETICS OF LIQUID PENETRATING INTO GRAIN BOUNDARY

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1995年第3期5卷 88-92页

作者： Chen, Kanghua Huang, Baiyun (Powder Metallurgy Research institute,central south university of Technology, changsha 410083. central south Univ of Technology Changsha China

ＫＩＮＥＴＩＣＳＯＦＬＩＱＵＩＤＰＥＮＥＴＲＡＴＩＮＧＩＮＴＯＧＲＡＩＮＢＯＵＮＤＡＲＹ￥Ｃｈｅｎ，Ｋａｎｇｈｕａ；Ｈｕａｎｇ，Ｂａｉｙｕｎ（ＰｏｗｄｅｒＭｅｔａｌｌｕｒｇｙＲｅｓｅａｒｃｈｉｎｓｔｉｔｕｔｅ，Ｃｅｎ... 详细信息

ＫＩＮＥＴＩＣＳＯＦＬＩＱＵＩＤＰＥＮＥＴＲＡＴＩＮＧＩＮＴＯＧＲＡＩＮＢＯＵＮＤＡＲＹ￥Ｃｈｅｎ，Ｋａｎｇｈｕａ；Ｈｕａｎｇ，Ｂａｉｙｕｎ（ＰｏｗｄｅｒＭｅｔａｌｌｕｒｇｙＲｅｓｅａｒｃｈｉｎｓｔｉｔｕｔｅ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉ...

关键词： interface interface energy wetting penetration

COMPUTER MODEL OF COPPER SMELTING PROCESS AND DISTRIBUTION BEHAVIORS OF ACCESSORY ELEMENTS

在线全文

学校读者我要写书评

暂无评论

Journal of central south university 1997年第1期9卷 36-41页

作者： Tan Pengfu Zhang Chuanfu(Department of Nonferrous Metallurgy. central south university ofTechnology, changsha 410083. china) Department of Nonferrous Metallurgy Central South University of Technology Changsha 410083 China

A computer model has been developed to simulate the distribution behaviors of Ni, Co. Sn. Ph,Zn, As, Sb, Bi, An and Ag in copper smelting process. The model assumes that the copper smelting furnaceis in thermodynamic equilibrium. As many as 21 elements (Cu. S, Fe. Ni, Co. Sn, As, Sb. Bi, Ph. ***. Ag. O, N, C, H, Ca, Mg, Al, and St) and 73.compounds are considered. This model accounts forphysical entrainment in the melts. The predictions by the present computer model are compared with theknown commercial data from Guixi Smelter in china, Home Smelter in Canada and Naoshima Smelter inJapan. The agreements between the computer predictions and the commercial data are excellent, so that thepresent computer model can be used to monitor and optimize the actual industrial operations of copper smelting. It is applicable to simulation of almost all copper pyrometallurgical processes.

关键词： simulate distribution behaviors copper smelting computer model

EFFECTS OF TRACE Zr ON FATIGUE CRACK GROWTH RATE OF HIGH DAMPING Zn-Al ALLOY

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1996年第3期6卷 92-95页

作者： Zhou Shanchu Luo Binghui (Department of Materials Science and Engineering,central south university of Technology, changsha 410083. CENT S UNIV TECHNOL DEPT MAT SCI & ENGNCHANGSHA 410083PEOPLES R CHINA

ＥＦＦＥＣＴＳＯＦＴＲＡＣＥＺｒＯＮＦＡＴＩＧＵＥＣＲＡＣＫＧＲＯＷＴＨＲＡＴＥＯＦＨＩＧＨＤＡＭＰＩＮＧＺｎ－ＡｌＡＬＬＯＹ￥ＺｈｏｕＳｈａｎｃｈｕ；ＬｕｏＢｉｎｇｈｕｉ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓ... 详细信息

ＥＦＦＥＣＴＳＯＦＴＲＡＣＥＺｒＯＮＦＡＴＩＧＵＥＣＲＡＣＫＧＲＯＷＴＨＲＡＴＥＯＦＨＩＧＨＤＡＭＰＩＮＧＺｎ－ＡｌＡＬＬＯＹ￥ＺｈｏｕＳｈａｎｃｈｕ；ＬｕｏＢｉｎｇｈｕｉ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅ...

关键词： Zr Zn-Al alloy fatigue crack growth rate internal friction