用等厚干涉测定液体折射率

介绍一种采用等厚干涉原理测定液体折射率的简单可靠的方法。     

直线与平面(选择题五题)

1.“两条平行线确定一个平面”,此命题可分开看作 (A)半定理,半推论 (B)半推论,半定义 (C)半定义,半公理 (D)半公理,半定理     

幂指对函数一例

题 下列函数,在区间[0,1]上为减函数的是( )     

基于低功耗双边沿D触发器的任意进制异步计数器设计

从D触发器激励表入手，分别给出了采用单边沿D触发器和双边沿D触发器的2^n进制异步加法计数器、减法计数器的设计方法．在此基础上，采用逻辑函数修改技术，通过实例讨论了基于单边沿D触发器和双边沿D触发器的异步任意进制计数器的设计．该设计方法方便，快速，具有一定的实用意义．     

(七) 复数

[分析] |z|=2的图形是个圆,|z＇ i|=2的图形也是一个圆。问题化为求后一个圆上离原点最远的点的距离。     

KNbO3：Fe晶体的时间微分效应及图像追踪

本文观察到了KNbO_3:Fe晶体的时间微分效应,并用这个微分效应进行了图像追踪的演示,为KNbO_3:Fe晶体在光折变器件领域的应用进行了有益的探索。     

LIQUID CHLOROPRENE-HYDROXYETHYL METHACRYLATE COPOLYMER MODIFIED EPOXY RESIN Ⅱ. N, N-DIMETHYL BENZYL AMINE CURING SYSTEM

A series of liquid chloroprene-hydroxyethyl methacrylate copolymer (CP-HEMA) modifiedepoxy resin were prepared. The effects of CP-HEMA content, curing conditions on physical pro-perties of the modified system were examined. With IR and Viscoelastocuremeter, the curing reactionrate was determined and the mechanism of the curing reaction was discussed. The effects of CP-HEMA content and curing conditions on morphology were mainly observed by scanning electronmicroscopy.     

修饰剂结构对桥氧双核锰2，2＇－联吡啶配合物电化学的影响

修饰剂结构对桥氧双核锰２，２＇－联吡啶配合物电化学的影响吴丛笑，郑军伟，陆天虹（中国科学院长春应用化学研究所电分析化学开放实验室，长春，１３００２２）关键词桥氧双核锰２，２＇－联吡啶配合物，烟酸，异烟酸，２－羧酸吡啶锰酶在生物体系中作为一类重要的氧化...     

POLYURETHANE-POLYSTYRENE INTERPENETRATING NETWORKS

A series of polyurethane based on liquid chloroprene-hydroxyethyl methacrylate copolymer(CP-co-HEMA)-polystyrene (PS) interpenetrating polymer networks (PU-PS IPN) were synthe-sized. Some physical properties were examined and density behavior was investigated. In 60%polyurethane (PU) system, the tensile strength and density increased greatly. Transmission electronmicrographs showed that the phase separation existed and the sizes of PS domains dispersed in PUphase were about 500-4,000 A. In comparison with correlative PU-PMMA IPN system, whichhas the higher compatibility, this system showed an extensive phase separation and clear boundaries.There was no phase inversion observed even for 60% PU system in which PS was still the dispersed phaseand PU the continuous phase. This was due to the relatively faster rate of formation of PU than thatof ST polymerization.     

整体柱在线净化-液相色谱-高分辨质谱法快速测定牛奶中15种糖皮质激素

将自制的在线固相萃取柱与液相色谱串联四极杆静电轨道离子阱质谱技术相结合,建立了快速测定牛奶中15种糖皮质激素类药物的新方法.样品采用乙腈均质提取2 min,经自制在线固相萃取小柱富集净化,在Waters CORTECS T3(150 mm ×2.1 mm,5μm)分析柱上实现良好分离,外标法定量.15种目标物质量浓度在0.10～100 ng/mL范围内线性关系良好,相关系数均大于0.99;在0.20,0.40,2.0μg/kg3个添加水平下,15种糖皮质激素的回收率在87.1％ ～ 116.0％之间,相对标准偏差(RSD)在3.2％～8.7％(n=6)之间;方法的检出限(LOD,S/N≥3)和定量限(LOQ,S/N≥1O)分别为0.10和0.20μg/kg.该法适用于大批量牛奶中糖皮质激素类药物的快速定性筛查和定量分析.