A novel time-to-live countdown scheme based on asymmetric Mach-Zehnder interferometer and Fabry-Perot semiconductor optical amplifier

We propose a novel optical time-to-live (TTL) processing scheme using asymmetric Mech-Zehnder interferometer (AMZI) and Fabry-Perot semiconductor optical amplifier (FP-SOA). AMZI transfers M TTL pulses into M-1 pulses and two residual pulses with 6-dB power difference. FP-SOA enhances the power difference between the M-1 pulses to the residual pulses to more than 10 dB. A numerical model is established for verifying the feasibility of this scheme.     

Novel optical packet with non-return-to-zero label and duobinary carrier-suppressed return-to-zero payload

A novel packet format with non-return-to-zero(NRZ)label and duobinary carrier-suppressed return-to-zero (DCS-RZ)payload is proposed for optical packet switching networks.NRZ label is followed by DCS-RZ payload with a certain guard time.The spectra of the low-rate NRZ label locate around the optical carrier frequency where some parts of the corresponding spectra of the high-rate DCS-RZ payload have been suppressed due to DCS-RZ modulation.At the switching node,the label or payload extraction can be realized simply through an optical bandpass or notch filter respectively.The feasibility of the scheme is verified by the simulation on the famous photonic design platform designed by Virtual Photonics Inc. (VPI).The effects of optical filter bandwidth on the received signal quality are discussed by analyzing bit error rate(BER)and contrast ratio performances.     

一种在光网络实现流量工程的快捷的路由算法

提出了一种在光网络中实现流量工程的快捷的有带宽保证的负载均衡动态路由算法。该算法通过提出期望负载率的概念和新定义的链路关键度函数以及链路当前可用带宽确定链路动态成本，并依据该动态成本运用最短路径优先算法为到达的LSP请求建立动态成本优化路径。仿真实验表明，与其他算法相比，该算法在降低LSP建立请求服务拒绝率、均衡网络负载以及链路失效后重路由等方面有更好的性能。     

数字高速分幅相机中光学分幅系统的设计与分析

使用光学辅助设计软件ZEMAX设计了用于四通道数字高速分幅相机的光学分幅系统，并结合机械设计软件SOLIDWORKS，在ZEMAX的非序列模式下建立了光学分幅系统的三维立体仿真模型。成像质量达到了衍射极限，动态极限空间分辨率为16lp／mm。模拟分析结果表明成像质量理想，符合设计要求。     

几丁质合成酶抑制剂

几丁质合成酶是生物合成几丁质的关键物质。几丁质是昆虫表皮和真菌细胞壁的特征成分，由于存在的特殊性而成为农药、医药研发的独特靶标。几丁质合成酶抑制剂由于具有安全、高效等特点，成为农用杀虫、杀螨、杀菌剂以及医药抗真菌药物的研发热点。本文综述了天然及人工合成的几丁质合成酶抑制剂的研究进展，并对其发展趋势进行了展望。     

环糊精接枝聚硅氧烷气相色谱固定相的手性拆分性能

用环糊精接枝聚硅氧烷（二环[2，6－二－O－戊基－3－O－己烯基（－5）]五环[2，6－二－O－戊基－3－O－甲基－β－CD聚硅氧烷]作气相色谱固定相成功地拆分具有两个手性中心的物质－－2，6－二乙酰氧基庚烷；考察了色谱条件对手性拆分的影响。     

Development of an Indirect Competitive ELISA Based on Polyclonal Antibody for the Detection of Diethylstilbestrol in Water Samples

An indirect competitive enzyme-linked immunosorbent assay （icELISA） based on polyclonal antibody for the estrogen diethylstilbestrol （DES） was developed. With this aim, two different haptens mono-O-3-carboxypropyldiethylstilbestrol （DES-CP） and mono-O-carboxymethyldiethylstilbestrol （DES-CM） with carboxylic group that preserve the molecular structure character of diethylstilbestrol were synthesized. The haptens were conjugated with the carder proteins bovine serum albumin （BSA） by mixed-anhydride method for immunogen and conjugated with ovalbumin （OVA） by active ester method for coating antigen. Polyclonal antibodies for diethylstilbestrol were raised by immunizing mice with immune antigen DES-CP-BSA. Under optimized system, the lowest limit of detection （LLD） of diethylstilbestrol was 0.01 ng/mL, and IC50= 1.02 ng/mL. Its analogs were tested and no obvious cross-reactivity was found to anti-diethylstilbestrol antibody. DES-fortified water samples were determined by simple dilution to diminish the matrix effect. The comparison between the amount of DES estimated by ELISA and the amount added indicates good agreement for all water samples tested, with mean recovery values ranging from 86% to 120.2%.     

乙基橙指示催化动力学极谱法测定痕量铜

１　引　言在ＨＡｃ－ＮａＡｃ介质中，邻菲■啉（ｐｈｅｎ）存在下，痕量铜对抗坏血酸还原乙基橙反应具有强烈的催化作用，且在此条件下乙基橙于－０．３０Ｖ（νｓ　ＳＣＥ）处，有一灵敏的极谱波，以此作为监测反应过程中乙基橙的浓度变化，建立了测定铜的催化动力学极谱方法。２　实验部分２．１　仪器与试剂　ＪＰ３－１型示波极谱仪（山东电讯七厂），ＣＳ５０１型超级恒温器（重庆试验设备厂）。０．５０ｍｇ／ＬＣＵ（Ⅱ）标准溶液；７．０ｘ１０－４ｍｏｌ／Ｌ乙基橙溶液；０．５ｍｏｌ／Ｌ　ＨＡｃ－ＮａＡＣ缓冲溶液（ｐＨ＝４．…     

5-芳甲氧基-3(2H)-哒嗪酮衍生物的设计、合成与生物活性

为寻找新型昆虫生长调节活性化合物, 设计合成了15个未见文献报道的5-芳甲氧基取代的3(2H)-哒嗪酮衍生物, 所有化合物结构均通过¹H NMR, IR和元素分析确证. 初步生物活性研究表明, 化合物8o对2龄家蝇幼虫有明显的抑制作用; 化合物8a, 8c, 8g和8j对3龄蝗蝻显示出较好的生物活性. 对目标化合物的构效关系亦进行了初步探讨.     

时间分辨光电离质谱

介绍了时间分辨光电离质谱（ＴＰＩＭＳ）以及在离子单分子解离反应动力学及能量学研究中的应用。与传统光电离质谱不同，时间分辨光电离质谱可以得出时间分辨的光电离效率曲线（ＰＩＥ），它能够克服传统动力学位移。用ＲＲＫＭ／ＱＥＴ统计理论计算模拟时间分辨的ＰＩＥ曲线，可得出分子离子分解反应的动力学参数：活化能Ｅｏ活化熵△ｓ￣（≠），以及各离子的生成热数据和分子离子的键能数据。