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过氧化二碳酸酯和N N-二羟烷基对甲苯胺体系引发甲基丙烯酸甲酯聚合

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高等学校化学学报 1989年第5期10卷 506-510页

作者：丘坤元傅杰北京大学化学系

本文以过氧化二碳酸酯BPPD和芳叔胺DHET、DHPT、DMT、DMA组成的引发体系进行MMA聚合的研究。测定了聚合速率R_p,发现添加DHET、DHPT能促进MMA的聚合,缩短诱导期,提高R_p,其效果要比DMT、DMA为好。测定了E_3.聚合速率方程。由ESR谱和端... 详细信息

本文以过氧化二碳酸酯BPPD和芳叔胺DHET、DHPT、DMT、DMA组成的引发体系进行MMA聚合的研究。测定了聚合速率R_p,发现添加DHET、DHPT能促进MMA的聚合,缩短诱导期,提高R_p,其效果要比DMT、DMA为好。测定了E_3.聚合速率方程。由ESR谱和端基分析证实DHET、DHPT芳胺组分产生的自由基能引发单体聚合。

关键词： MMA 聚合引发机理氧化还原引发

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条形介质波导导模的近似分析

光学学报 1986年第10期6卷 930-935页

作者：乔力佘守宪北方交通大学应用数理系

本文提出适用于计算各类条形介质波导导模传播特性与场分布的微扰方法、变分方法.本文导出的各表达式形式较简单,计算结果较其它近似方法准确,与精确的数值计算符合较好,便于应用.

关键词：介质波导导模本征值方程近似分析

Extraction and Comparison of Polysaccharidepeptides of Ganoderma lucidum Cultivated with Grass and Wood Log

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Extraction and Comparison of Polysaccharidepeptides of Ganod...

2.02.际灵芝专题研讨会

作者： Shu-Qian Lin Shai-Zhen Wang Shu-Guang Lin Zhi-Bin Lin 1 Fuzhou Green Valley Institute of Bio-pharmaceutical Technology, Fuzhou, china 2.1}, of Pharmacology, School of Basic Medical Science,{2., Beijing, china

This research studied the optimal conditions for extracting polysaccharide-peptides from Ganoderma lucidum, and compared the amounts of polysaccharide-peptide and heavy metals of Ganoderma lucidum cultivated with grass and wood log. The polysaccharide-peptide was obtained by water extraction, ethanol precipitation and reserve dialysis. Heavy metals were examined by atom absorptive spectrum and atom fluorescence *** optimal condition for extracting polysaccharide-peptide from Ganoderma lucidum fruit body was the ratio of sample to water 1 : 15, temperature 1001, time 3.hours. The polysaccharide-peptide content in grass-cultivated Ganoderma is 1 to 3.times higher to that in wood log-cultivated Gano-derma. Heavy metals examination shows that Hg and As in the polysaccharide-peptide meet with the requirement, while Pb content is exceed the food standard.

关键词： polysaccharide-peptide, extraction conditions, heavy metal examination

Immunological effects of multiwalled carbon nanotubes in mice

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生物物理学报 2009年第S1期25卷 72-72页

作者： Jie Meng1, Man Yang1, Fumin Jia1, Hua Kong1, Chaoying Wang2. Rui Wang3. Jianmin Xing4, Chen Wang3. Sishen Xie2. Haiyan Xu1 1 Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & peking Union Medical College, Beijing,{3. 2.Institute of {2., Chinese Academy of Sciences, Beijing,{3. 3.National Center of Nanoscience and Technology, Beijing,{3. 4 Beijing university of Chinese Medicine, Beijing,{3..

This work investigates the interaction between oxidized and water-soluble multiwalled carbon nanotubes (wsMWCNT) and the immune system of both murine

关键词： adjuvant carbon nanotubes anti-tumor

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Reflective Fourier CGH with 16 phase levels

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Chinese Journal of Lasers 1992年第5期 53-57页

作者： Pin Long, Dahsiung Hsu (Applied physics department, Beijing {2. of Posts & Telecommunications,Beijing 100088,{3.)Minxian Wu, Kuofan Chin(Dept. Precise Instruments, Tsinghua {2.,Beijing 1000084,{3.)Shiping Gao (Microelectronic Research Center,china Science Academy)

This paper reports design and fabrication of reflective Fourier computer generat-ed hologram(CGH) with 16 phase *** CGH converts a single beam to a 5×5 *** measured diffraction efficiency is 76.16％. The size of the ... 详细信息

关键词： computer generated hologram array generator optimization simulated annealing

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正赝复合全景像全息术

光学学报 1989年第10期9卷 955-960页

作者：傅声乔湘潭大学物理系

本文提出一种利用正、赝再现像,将物体的正、反两面信息复合在一起的全息术.在一张全息干板片上,可以同时看到物体的两面,增强立体效果和艺术感.文中介绍了原理、方法和结果.

关键词：全息术合成全息

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Semiclassical Molecular Dynamics Investigation of 1,3.Cyclohexadiene （CHD）

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Semiclassical Molecular Dynamics Investigation of 1,3-Cycloh...

中国化学会第九届全国量子化学学术会议

作者： Lei Yibo, Dou Yusheng, Zhai Gaohong, Wen Zhenyi Chemistry department, Northwest university, Xi''an 710069,{2. department of Physical Science, Nicholls State university, Thibodaux, LA 703.0,U.S.A. Institute of Modern physics, Northwest university, Xi''an 710069,{2.

＜正＞The ring-opening reaction of 1,3.cyclohexadiene （CHD） serves as model for a wide-variety of photochemical reactions, including that in the synthesis of vitamin-D. Upon excitation with ultraviolet light, CHD forms a close hexatriene （HT） structure. This structure then rapidly isomerizes to form a longer open chain. This reaction has been studied by a variety of non-linear spectroscopy, such as pump-probe experiments as well as by time-resolved electronic diffraction in the gas phase. For the last few

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CuNi合金电阻极小值理论

金属学报 1986年第4期 63-66页

作者：杨振凡刘福绥武汉大学物理系北京大学物理系

在稀磁合金中发现低温下电阻率的Kondo效应以后,一个非常引人注目的现象是含3.—42.t.-％Ni的Cu合金中,也存在电阻率低温反常,实验结果为图1中圆圈所示（最近在AuNi合金中也观测到相同的现象）。这个电阻异常的特点是极小值的宽度和出... 详细信息

在稀磁合金中发现低温下电阻率的Kondo效应以后,一个非常引人注目的现象是含3.—42.t.-％Ni的Cu合金中,也存在电阻率低温反常,实验结果为图1中圆圈所示（最近在AuNi合金中也观测到相同的现象）。这个电阻异常的特点是极小值的宽度和出现极小值的温度,都随Ni含量的增加明显地加大。这个现象普遍认为是磁性集团效应引起的,不是单个Ni原子引起的。但是,至今尚无一个理论对此现象作出定量的解释。本文应用无序自旋集团模型导出一个电阻率公式,对此现象作了定量的解释。

关键词：极小值 CuNi 电阻率电阻系数磁性杂质自旋粒子性质最近邻

ROLE OF FLEXIBLE CYSTOSCOPE ASSISTED MPCNL IN TREATMENT OF STAGHORN CALCULI

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ROLE OF FLEXIBLE CYSTOSCOPE ASSISTED MPCNL IN TREATMENT OF S...

第十五届全国泌尿外科学术会议

作者： WANG GANG, ZHANG XIAOCHUN (department OF UROLOGY, FIRST HOSPITAL, INSTITUTE OF UROLOGY, peking university 10003.)

Purpose: To investigate the feasibilty and efficacy of flexible cystoscope assisted mPCNL in treatment of staghorn calculi. Materials and Methods: Between July 2.06 and Mar 2.08, 108 cases of staghorn calculi were tre...

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