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| 1 | Flow stress equation for multipass hot-rolling of aluminum alloys显示文摘A series of simple axisymmetric compression tests were carried out on the computer servo controlled Gleeble 1 500 machine when strain rates ranged between 0.05 25 s -1 and deformation temperature 300 500 ℃. The results show that flow stress is related to the Zener Hollonom parameter Z and strain, as well as the static recrystallization fraction between passes during multipass hot deformation of 5182 aluminum alloy. Hence, a modified exponential flow stress equation was presented by considering the values of ln A and β as functions of strain, and by using the uniform softening method and incorporating the static recrystallization fraction between passes to consider the effects of residual strain during multipass hot rolling of 5182 aluminum alloy. The validity of the equation was examined by a typical non isothermal multipass deformation test. | ZHANG Hui,PENG Da shu,YANG Li bin,MENG Li ping (Department of Materials Science and Engineering, Central South University, Changsha 410083, China) | 2001 | Journal of Central South University of Technology2001，8，1： | 7 |
| 2 | High sensitive detection of presenilin-1 point mutation based on electrochemilumi-nescence显示文摘Electrochemiluminescence (ECL) is a high- sensitive detection method with broad biological applications. Ruthenium (Ⅱ) tris (bipyridyl) 2+3(Ru(bpy)) and tripro-pylamine (TPA) are most commomly used combination of the reactive species in ECL. The redox of 2+3Ru(bpy) with excess TPA at the surface of an electrode produces a highly efficient and stable light emission due to a rapid cycle of the reactions. This rapid, highly sensitive and accurate method has been applied to gene quantification. In this work, an ECL detection system is designed and applied in detection of presenilin-1 (PS-1) gene mutation. The results show that given the same polymerase chain reaction (PCR) cycle num-ber, the ECL intensities from the digested and the undigested wild-type samples are nearly identical, but the difference in ECL intensities between the digested and the undigested mutant samples is distinctive. This detection technology connects PCR with ECL and allows a reliable discrimination between the wild-type and the mutant genes. | ZHU Debin, XING Da, SHEN Xingyan & YAN Guihong Institute of Laser Life Science, South China Normal University, Guang-zhou 510631, China Correspondence should be addressed to Xing Da (e-mail: xingda@ scnu.edu.cn) | 2003 | Chinese Science Bulletin2003，48，16： | 4 |
| 3 | Ultrasound in space显示文摘 | Martin DS South DA Garcia KM | 2003 | Ultrasound in Med & Biol2003，29，1： | 1 |
| 4 | Ultrasound in space显示文摘 | Martin DS South DA Garcia KM | 2003 | Ultrasound Med Biol2003，129，1： | 1 |
| 5 | Comparison of echocardiographic changes after short and long duration spaceflight显示文摘 | Martin DS South DA Wood ML | 2002 | Aviat Space Environ Med2002，73，： | 1 |
| 6 | Fluorescence Resonance Energy Transfer Analysis of Bid Activation in Living Cells during Ultraviolet-induced Apoptosis显示文摘紫外(紫外) 照耀是触发 apoptosisthrough 的一个损坏 DNA 代理人膜死亡受体和 mitochondrial apoptotic 发信号小径。出价, apro-apoptotic Bcl-2 家庭成员,在到响应 DNAdamage.In 的 apoptosis 的大多数房间类型是重要的这研究,一个 recombinant 原生质标志, YFP-Bid-CFP ,黄和青色包括了荧光灯的蛋白质和一个完整的长度出价,被用作荧光回声精力转移分析(烦恼) probe.Using FRET 技术基于 YFP-Bid-CFP ,我们发现出价激活在紫外照耀以后在 9+-1 h 被开始,并且激活的平均持续时间是与 50+-10 min.When 房间的平均持续时间与 mitochondrial 膜潜力的倒塌与一致的 75+-10min .Bid 激活是有 Z-IETD-fmk 的 pretreated ( caspase-8 特定的禁止者)出价激活的过程完全被禁止,但是 apoptosis 仅仅是 partiallyaffected.Z-DEVD-fmk ( caspase-3 禁止者)和 Z-FA-fmk (非毒蛇特定的禁止者)没堵住 Bidactivation.Furthermore ,内长的出价激活与或没有响应 UVirradiation 的 Z-IETD-fmk 被西方的弄污证实。在摘要,用 FRET 技术,我们在紫外导致 apoptosis 期间观察了出价激活的动力学并且发现它是一个 caspase-8 依赖者事件。 | Yinyuan WU Da XING Lei LIU Tongsheng CHEN and Wei R.CHEN MOE Key Laboratory of Laser Life Science &Institute of Life Science,South China Normal University,Guangzhou 510631,China | 2007 | Acta Biochimica et Biophysica Sinica2007，39，1： | 1 |
| 7 | Cutis marmorata telangiectatica congenita (congenital generalized phlebectasia)显示文摘 | South DA Jacobs AH | 1978 | J Pediatr1978，93，： | 1 |
| 8 | A novel cancer imaging method using chemi-luminescence-mediated sonosensitization显示文摘In this paper, we introduce a novel method named chemiluminescence mediated sono dynamic diagnosis (SDD), which is designed as follows: sonosensitizer is used to localize the cancer tissue, and is sonosensitized by the ultra- sound field to produce oxygen free radicals. Then, another agent, FCLA (fluoresceinyl cypridina luciferin analog), re-acts with 1O2 to efficiently transform the chemical energy of 1O2 to photons, thus a strong chemiluminescence is emitted. One can then detect this emission with a high sensitive CCD imaging system to localize the tumor. Based on the principle of chemiluminescence mediated SDD, we obtained a clear diagnostic image of a transplanted tumor in a nude mouse in the experiments. This method could have potential applica-tions in clinics for early stage tumor diagnosis. | HE Yonghong, XING Da & WANG Juan Institute of Laser Life Science, South China Normal University, Guang-zhou 510631, China Correspondence should be addressed to Xing Da (e-mail: xingda@scnu. edu.cn) | 2003 | Chinese Science Bulletin2003，48，8： | 1 |
| 9 | A PRELIMINARY APPROACH TO THE GEOTECTONIC EVOLUTION HISTORY AND MINERLIZATION IN VICTORIA, AUSTRALIA显示文摘According to the available data and field research, based on the diwa theory, the authors have studied the geotectonic evolution history and the associated minerlization in the Victoria area. It has been shown that this area is in fact a part of the Lachlan diwa region. The Victoria area can be divided into geodome fault fold zone and subsidence zone. The former can be subdivided into three zones, from west to east, which are western uplift zone, central depression zone and eastern uplift zone. The evolution history of the Victoria area can be divided into four stages——Pregeosyncline, geosyncline, plateform and diwa. Each stage has distinct sedimentary, magmatic and structural features. Of the four stages, diwa stage is the most important for minerlization. Diwa stage started in the Devonian. During the development of diwa, a number of granites, which are characterized by high SiO 2 and Na 2O+K 2O, were formed. The granites were abundance with mineral forming material. On the other hand, diwa geotectonism reformed and enriched the geosynclinal or platform ore deposits. Therefore, most of the ore deposits that occurred in the Victoria area are, more or less, related with diwa tectonism. | DAI Ta-gen and CHEN Gua da (Dept. of Geology, Central South Univ., Changsha 410083, China) | 2001 | Geotectonica et Metallogenia2001，25，1： | 0 |
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