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Abstract: Aim To synthesize isonucleoside-incorporated oligonucleotides and investigate their binding abilities with complementary sequences.Methods The synthesis was performed on DNA synthesizer, and the binding behavior was investigated by thermal denat
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文摘:目的合成异核苷掺入寡核苷酸并考察它们与互补序列的结合能力.方法采用DNA固相合成仪合成寡核苷酸,通过热变性实验考察双链的稳定性.结果合成了四条单异核苷掺入的寡核苷酸,热变性实验结果发现异核苷的引入降低了双链的稳定性,当异核苷处于寡核苷酸链的中央时,这种影响更为明显.异核苷6′-OH处于游离和烯丙基保护状态时的结果没有显著差异.结论寡核苷酸中的异核苷使链发生扭曲,从而导致双链稳定性降低. |
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Abstract: Aim at the photocurable sterelithography in which micro-components are made according to point-to-point exposure, the paper describes that this method takes long prototyping time，and it is one of main factors to restrict extension and applicatio
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文摘:采用离散点曝光方式来制作微型构造物的光固化快速成型法，其成型时间长，这一问题是制约微型光固化快速成型技术迅速推广应用的主要因素之一。 |
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Abstract: Aim study the characteristic of the hemolysin of Edwardsiella tarda.
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文摘:目的研究迟缓爱德华菌溶血素的特征。 |
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Abstract: Aim we wanted to approach whether etiological basis of the epidemic eosimephilic meningitis were angiostrongylu cantonensis in WenZhou.
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文摘:目的研究温州流行性嗜酸粒细胞增多性脑膜炎病原是否为广州管圆线虫。 |
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Abstract: Aimed at teaching of the NC technique,it develops the system that can be used to program,link,debug and maintain.This system is capable of setting failure in machine tool,and simulating.
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文摘:从数控技术应用人才培训的实际出发，专门针对数控机床故障诊断和维修的培训需要，研制了数控机床编程操作、连接、调试、维修的培训设备，在人为设置数控机床的故障方面进行了一些尝试，以达到能够方便、多次地设置与排除故障。 |
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Abstract: Aimed to realize the problem of quenched rail qualification forcast through quantitative analysis of quenched rail surface hardness by eddy current, and combined the eddy current theory with the computer image processing and signal analysis, the
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文摘:针对涡流无损检测淬火钢轨踏面硬度的定量分析来实现淬火钢轨质量保证预报问题，将电涡流理论与现代计算机图象处理和信号分析相结合，完成硬度测试模型建立。 |
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Abstract: Aiming at the variety of modals of nonlinear systems,we proposed a general parameter estimation method based on Genetic Algorithms(GA),which can be used in most kinds of nonlinear system modal.This method was applied to simulating parameter esti
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文摘:针对非线性系统模型的多样性，提出适用于多种非线性模型的基于遗传算法的参数估计方法，并以多种非线性模型为例作了仿真研究.结果表明，遗传算法是非线性系统模型参数估计的有效工具. |
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Abstract: Aimming at the defects of the brick masonry norm,through test on masonry wall models,the monolithic spacial effect for longitudinal and lateral walls of brick masonry buildings is studied and suggestions of calculated formulas for seismic resist
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文摘:针对砌体规范中墙体抗震验算中的不足之处，通过模型砖墙试验，研究了带翼缘墙在水平荷载作用下的恢复力特性曲线、砖墙破坏特征以及纵墙的影响等，并提出了在墙体抗震验算中应当考虑纵横墙共同作用的建议. |
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Abstract: Al2O3 moisture sensor is a new type water sensor, which can measure minim water.
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文摘:氧化铝湿度传感器是一种新型的测量微量水分的传感器，在物料干燥和环境湿度监测中都具有重要的应用。 |
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Abstract: All kinds of natural and human factors, including climate, organism, landform, m other rock and material, and human disturbance, influenced the genesis and devel opment of soils in Shunde Ecological Paradise, Guangdong Province.
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文摘:广东省顺德生态乐园内的土壤形成发育受气候、生物、地形地貌、母质母岩和人为干扰等5大因素的影响，其中人为活动是导致土层结构破坏和水土流失的主要原因。 |
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Abstract: Along with information technology swift and violent development,Electronic commerce by the speed development which estimates with difficulty.Electronic commerce is changing social economy each aspect,Electronic commerce has the broad prospect.Bu
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摘要：随信息技术迅猛发展,电子商务以难以估量的速度发展.电子商务改变着社会经济的各个方面,电子商务有着广阔的前景.但电子商务在法律、税收、安全等方面存在着很多问题,要发展电子商务还必须从加快普及电子商务常识,大力推进企业信息从建设、培养电子商务人才等方面下功夫.文章通过对当前国内外,流行的电子商务的发展现状进行描述,指出我国电子商务存在的制约因素,寻找符合我国国情的电子商务发展的对策。 |
