一种高效纯化血清淀粉样物质A(SAA)的方法

通过密度梯度超速离心、脱脂从急性相胸水中分离得到含有血清淀粉样物质A（Serum AmyloidA,SAA）的高密度脂蛋白（HDL），再通过两次Sephacry1S-200层析纯化SAA蛋白。经SDS-PAGE电泳和Western Blotting检验证实得到的SAA蛋白纯度高，可作为抗原免疫动物制备抗体，方法可用于从胸水中大量制备SAA。     

数学诗

1.向量给你一个方向,你就成为向量.给你一个坐标,让你展翅翱翔.给你一个基底,征途由此启航.繁复的几何关系,变成纯代数的情殇.不管起点在哪里,你始终在水一方.啊,向量,矢志不渝的理想!2.快乐,就跳起来想快乐,就把烦恼丢开,放开手,把舞跳起来.来吧,进入数学宫殿,这里有旋转的舞台.变量在跳跃,舞步轻快,公式在舞动,平稳和谐.曲线在变幻,斑澜五彩.智慧在伴唱,激情澎湃.符号的神奇大观,结构的精心安排.换元不换伴侣,嵌入巧借迭代,从西汉时期的《周髀算经》,到哥德巴赫猜想的无奈.智慧的结晶,人间的至爱.生生不息,一代一代.跳起来,跳起来,把一切…     

High-power and high-efficiency operation of an all-solid-state, quasi-continuous-wave, titanium sapphire laser system

High-power and high-efficiency operation of an all-solid-state, quasi-continuous-wave, titanium sapphire laser is obtained with a diode-laser-pumped frequency-doubled Nd:YAG laser as the pump source. A maximum output power of 2.5 W is obtained for 16-W power of 532-nm pump light. A much higher conversion efficiency of 15.7% is obtained when at the maximum output power.     

用核磁共振量子计算机研究量子退相干问题

量子退相干理象是由系统与环境的纠缠所引起的系统相干性的消失，是一种纯粹量子力学效应[1].     

流水线用水玻璃砂VRH—CO2法的研究

着重研究了水玻璃砂ＶＲＨ－ＣＯ２法流水线作业时如何调整真空度，ＣＯ２用量和添加剂等，以保证型砂起模的即时强度，同时使０．５～３ｈ的短期存放强度在１ＭＰａ以上，实验结果表明：单纯用真空脱一ＶＲＨ－ＣＯ２法都不能使水玻璃砂的短期存放强度满足流水线生产的要求，只有加入添加剂才可以使ＶＲＨ－ＣＯ２法取得最好的硬化效果，水玻璃模数及ＣＯ２用量都对水玻璃砂短期存放强度有一定影响。     

抽吸和压力梯度在层流边界层转捩过程中的作用

用空间模式的二次稳定性理论研究了抽吸和压力梯度对边界层三维亚谐扰动流动稳定性的影响．数值结果表明，固体边界上的抽吸有明显的层流控制作用，逆压梯度则有较强的不稳定作用．     

Investigation of External Optical Feedback Resistance of IC—DFB and GC—DFB Lasers Using a Very Simple Experimental set—up

We study the external optical feedback resistance of both index-coupled(IC) and gain-coupled distributed feed-back(DFB) lasers using a very simple experimental set-up.Though IC-DFB lasers with large coupling coefficients are found to be less sensitive to external reflection,they suffer from mode instability at high injection level.On the other hand ,the introduction of gain-coupling mechanism can significantly improve both the immunity of external optical feedback and the single mode yield of the device.