硼酸化量子点荧光微球免疫层析试纸条定量检测甲胎蛋白

提高表面抗体活性是免疫检测探针制备的关键。硼酸可与IgG的糖基化Fc片段快速发生位点特异性结合,充分暴露抗原结合区Fab片段以提高抗体活性,避免常用的酰胺键共价偶联方法引起的抗体取向不当及自交联。本研究在合成硼酸修饰的聚马来酸酐-alt-1-十八碳烯（PBA-PMAO）的基础上,采用超声乳化法制备表面硼酸改性的量子点荧光微球（PBA-QBs）。该微球既可与抗体简便、快速地定向偶联,又因量子点含量高而具有很强的荧光信号。将其与甲胎蛋白（AFP）单克隆抗体室温共孵育5 min制备高抗体活性的荧光免疫层析检测探针并用于定量检测AFP,线性范围为0.98～31.25 ng mL-1,最低检测限为0.45 ng mL-1,检测耗时20 min。血清样品中AFP的加标回收率为91.0%～107.1%,批内、批间变异系数介于3.65%～10.42%。     

抗辐射数字电路加固技术研究

文章对电路抗辐射的机理进行了研究,提出了几种提高数字电路抗辐射能力的方法:通过工艺控制减小辐射后的背栅阈值电压漂移,通过版图增加体接触、采用环型栅等结构提高单元的抗辐射能力,通过对电路关键节点的加固提高整体电路的抗辐射能力。为了验证加固方法的可靠性,设计了一款电路进行抗总剂量、抗瞬态剂量率、抗中子辐射、抗单粒子辐射等多种试验。通过辐照试验结果可以看到,采用抗辐照方法设计的电路具有较强的抗辐照能力,为今后抗辐照电路的研制和开发奠定了坚实的基础。     

NOTE ON AN OPEN PROBLEM OF HIGHER ORDER NONLINEAR EVOLUTION EQUATIONS

In view of a new idea on initial conditions,an open problem of nonlinear evolution equations with higher order,which was given by J.L.Lions,is solved.Effect of our results is shown on an example.     

基于硝酮化衍生-高效液相色谱-荧光法测定环境水样中的脂肪醛

本研究以4-丁基羟胺-7-羟基-香豆素(HAHC)为荧光衍生试剂,基于硝酮化衍生生成具有良好荧光响应和色谱性能的反式产物,结合高效液相色谱-荧光检测法(HPLC-FLD),建立了水样中脂肪醛的高灵敏度、高选择性的检测方法。该方法成功分离、检测了8种脂肪醛(C2～C9),检出限低至0.2 nmol/L,且线性关系良好(R≥0.9984),重复性高,其日内相对标准偏差(RSD)≤3.97%,日间RSD≤7.69%。将其成功用于游泳池水、自来水、湖水和雨水中脂肪醛含量检测。该方法灵敏度高、结果准确且无需富集或萃取等复杂的样品预处理过程,为水体中的醛类污染物的监测提供了依据。     

浅N~+-P结雪崩电子有效发射的掺杂剖面计算(英文)

A very shallow N-P junction has been produced on a silicon substrate using a low energy ion implantation(≤25keV) followed by suitable annealing. The junction is in parallel to the silicon surface and able to emit electrons out of the surface when biased in avalanche breakdown. The number of emitting electrons significantly depends on doping profiles, junction depth, and work function of the electron emitting material.This paper reports the calculation of the optimum theoretical doping profiles. The calculation indicates that the N+ layer thickness must be of the order of 100A to obtain high efficiency η defined as the number of electrons emission out of Si surface per total number of avalanche electrons. The experimental results of the N+-P junction with desirable doping profiles will also be presented. This topic is the basic investigation for the design and fabrication of vacuum silicon devices.     

强度调制光纤多传感补偿网络所能补偿传感器的极限数目

本论文从对传感补偿网络的基础理论的探索性研究出发，首次提出强度调制光纤多传感补偿网络所能补偿传感器数目的理论极限公式，对多传感补偿网络的设计和应用有着重要的指导意义。     

V.34MODEM评测报告——测试表明Modem的性能不一

简单的算术告诉我们,两倍的传输速率就意味着电话费用的减半。公司组网人员对V.34Modem如此热心的原因是,28.8kb/s的V.34Modem标准是V.32bis标准数据率的两倍。 但是DATA COMM对V.34Modem的首次产品评估表明,事情并非总是象表面所看到的情况那样简单。 通过对24家独立式和7家PCMCIA插卡式Modem的冲击测试发现,在纯净的模拟线路上,所有产品都能表现所承诺的性能,但是在不纯净的环境下,很难从每一V.34Modem得到匹配的性能,此时失真、延迟和干扰大大影响了标准的峰值速率。 所测试的Modem大概分为三类:其一为零售价在1,000     

大黄药材指纹图谱研究

采用高效液相色谱法,Hypersil ODS柱,甲醇-1．0%冰醋酸为梯度流动相,研究了大黄的指纹图谱,其中大黄酸、大黄素、大黄酚、大黄素甲醚、芦荟大黄素作为为参照物,并对它们进行了含量测定．检测波长：430nm．共找出了23个共有峰,其中的5个峰是参照物,12个样品之间的相似度在90％以上．样品处理方法简单,研究所得的大黄指纹图谱稳定性、重复性好,可作为大黄药材的特征指纹图谱．     

MITOSIS OF NERVE CELLS IN THE CEREBRAL CORTEX OF ADULT RATS

Adult rats 4--5 months old and 150--200g in body weight were used in this experiment.Lesions were made with antiseptic precaution by excising portions (0.7×0.4×0.1cm) of thecerebral cortices under ether anesthesia. The animals were sacrificed by decapitation at thetime intervals ranging from 1 to 30 days after the operation. Specimens of the brain wereremoved from the lesions with their adjacent normal areas, and processed for histological andhistochemical studies. Mitotic figures were observed in nerve cells adjacent to the lesions. The mitotic processof these neurons is similar to that of the other tissue cells, as it can also be divided into fourstages--prophase, metaphase, anaphase and telophase. However, neurons are entirely dif-ferent from the neuroglia and other tissue cells in that these have characteristic cell pro-cesses, i. e. axon and dendrites, while most of the neurons are pyramidal cells of layers Ⅱand Ⅴ of the cerebral cortex. The other characteristic feature is that the dividing neuroncontains Nissl bodies in the cytoplasm.     

对称三唑Schif碱和氯化铜配合物的研究

本文介绍水 杨醛与４－氨基－３，５－二乙基－１，２，４－三唑缩合而成对称三唑Ｓｃｈｉｆｆ碱与氯化铜形成一种新的配合物Ｃｕ（ＳＡＥＴＺ）２（ＳＡＥＴＺ＝４－（邻羟苯基亚甲基）－亚胺－３，５－二乙基－１，２，４－三唑）。