以蔗糖为原料制取高果糖浆的研究

本文简要叙述了高果糖浆的现实意义以及国内外的生产发展概况。本项实验重点对果糖和葡萄糖的分离进行了研究。以国际上先进的理论为依据,以蔗糖为原料制取了含果糖高于90％的高果糖浆。     

工业生产胰岛素精制工艺改革研究 Ⅲ.从粗品胰岛素精制高纯胰岛素

胰岛素制剂的纯度与其抗原性密切相关。1972年Eli Lilly公司制成了单峰胰岛素和单组成胰岛素。1973年Novo公司和Nordisk公司,开发研制成单组分胰岛素。这些胰岛素制剂的抗原性大大低于一般胰岛素制剂。迄今为止,关于高纯度胰岛素制剂的研究,在我国还未见报导。作者应用离子交换凝胶柱层析技术,通过将一根阳离子——葡聚糖凝胶(CM-Sephadex C—50)柱和另一根阴离子——葡聚糖凝胶(QAE—Sephadex A—50)柱串联,并将层析收集液进一步纯化,从粗品胰岛素制成了高纯胰岛素。用酸、碱二种不连续体系的聚丙烯酰胺凝胶电泳,对制成的产品进行检测,结果证实电泳谱只显出单一的染色区带。这证明本产品的纯度达到了丹麦单峰胰岛素的水平。由于方法简便有效,适宜在生化制药厂推广应用。     

The v-v energy transfer of highly vibrationally excited states (I)──Vibrational quenching of CO(v) by CO_2

The relaxation of the highly vibrationally excited CO (v=1-8) by CO\-2 is studied by time_resolved Fourier transform infrared emission spectroscopy (TR FTIR). 193 nm laser photolysis of the mixture of CHBr\-3 with O\-2 generates the highly vibrationally excited CO(v) molecules. TR FTIR records the intense infrared emission of CO(v→v-1). The vibrational populations of each level of CO(v) have been determined by the method of spectral simulation. Based on the evolution of the time resolved populations and the differential method, 8 energy transfer rate constants of CO(v=1-8) to CO 2 molecules are obtained: (5.7±0.1), (5.9±0.1), (5.2±0.2), (3.4±0.2), (2.4±0.3), (2.2±0.4), (2.0±0.4) and (1.8±0.6) (10 -14 cm 3·molecule -1·s -1), respectively. A two_channel energy transfer model can explain the feature of the quenching of CO(v) by CO 2. For the lower vibrational states of CO, the vibrational energy transfers preferentially to the υ\-3 mode of CO 2. For the higher levels, the major quenching channel changes to the vibrational energy exchange between CO(v→v-1) and the υ\-1 mode of CO 2.     

某工程高大模板支撑系统设计与施工

分析了某工程高大模板支撑系统架设存在的模板支撑系统跨度大、高度高且平面长度长、基础承载力不易满足、承受荷载重、结构梁深等难点,从高支模架体设计所涉及的类型选择、基础处理、材料要求、设计验算等方面,从高支模架体施工管理所涉及的工序、监测、安全等方面,强调精细设计、严格管理、过程控制、精心施工,以保证该系统的施工安全.     

用遗传算法解决谈判中的冲突问题

提出在遗传算法基础上,针对遗传算法的具体步骤,提出了针对谈判冲突问题的二进制编码方法,基于Nash谈判解的适用度函数的确定方法,初始群体生成的方法,最优个体的保存方法,重组操作方法,变异方法,确定了遗传算法中参数的取值域及终止规则。     

《大学图书馆学报》高频被引论文和作者分析

分别时<大学图书馆学报>(1983-2007年)发文的高频被引论文分布和高频被引作者分布进行了分析,揭示了<大学图书馆学报>研究的现状.     

高速移动环境下基于OFDM的LTE系统ICI消除技术综述

在高速移动环境下,基于正交频分复用(orthogonal frequency division multiplexing,OFDM)的长期演进(longterm evolution,LTE)移动通信系统受信道快速时变引起的多普勒频偏影响,产生子载波间干扰(inter-carrier-interfer-ence,ICI),严重破坏系统性能。ICI成为LTE技术在高速移动场景下应用的一个难点。在分析多普勒频偏及ICI成因的基础上,总结国内外通过编码自消除、均衡、迭代判决反馈消除、时域快变信道估计等方法消除高速移动引起的OFDM系统ICI的主要方法,分析并指出现有方法存在的问题。在此基础上,介绍了最新提出的OFDM频域快变信道估计的思想。报道了LTE上、下行链路正交频分多址接入系统中相关问题的研究情况,并对后续的研究工作提出了展望。     

提高专利申请的可授权性应当注意的几个问题

通过具体案例分析了论文的公开、抵触申请、说明书公开不充分等问题对专利授权的影响,并给出了消除这些影响的方法,以提高发明专利申请的可授权性。     

《兄弟·上》的民间世界

余华的《兄弟.上》展示了“文革”中一个复杂的民间世界。小说告诉我们,当民间社会遭遇生存悖论、许多人迷失在纷乱的“政治"指示中时,还有一股暖人的力量在潜滋暗长,并支撑着人们走过了那段艰难的岁月。     

The role of the catalysts with highly dispersed and isolated active sites in the selective oxidation of light hydrocarbons

This review summarizes the role of catalysts with highly dispersed and isolated active sites (active sites: supported atoms f≤0.5%) in the selective oxidation of light hydrocarbons, such as methane, ethane and propane, into oxygenates and the epoxidation of olefins. The plausible structures of the highly dispersed and isolated active species, as well as their effects on the catalytic performances are discussed. The special physico-chemical properties and the functional mechanism of the catalysts with highly dispersed and isolated active sites, as well as the preparation, characterization of the catalysts with highly dispersed and isolated active sites and their applications in other types of reactions of lower hydrocarbons are summarized.