According to the electrophilic substitution of α-Allocryptopin by ICl, it can be suggested that there are competitions of n-donors (such as N and O atom occurred in alkaloid or solvent molecules) with the conjugated π system in alkaloid molecule for iodine monochloride when charge-transfer complexes are formed, which may block the formation of pre-reactive π-complex intermediate, and thus suppress the electrophilic substitution.
这一方法标记过程简便，标记产物富集于有机相，易于进一步纯化，其放射化学纯度接近95%，标记率超过70%；ICl与α-别隐品碱的亲电碘化反应结果表明，生物碱底物或溶剂分子中的N、O等n电子给体可能与亲电试剂形成电荷转移络合物，竞争芳香亲电取代反应π络合物反应前体的形成，从而抑制碘化反应的发生。
We can see the intermediate and legal retail sales of house property everywhere do business in the license in China, lying in Singapore we can hardly see street face ascend of house property, the beginning arrives the friend of Singapore to want that the subway stand mostly the small free advertisement of side block in and network up acquire the information of rent the building, this give illegal of black in lay the machine that can multiply by, they need not spend the cost need not pay tax and then can deliver the deceitful information everywhere to attain the bogus purpose, wide soldier of that the elephant bud cage is in the street etc.
在中国我们到处可以看到房产中介的合法门市在执照营业，在新加坡我们很难看到街面上的房产中介，初到新加坡的朋友大多要到地铁站旁的小免费广告拦里和网络上获得租房的信息，这就给不法的黑中介有了可乘之机，他们不必花成本不用上税就可以到处发虚假信息以达到骗人的目的，象芽笼街上的杨广军等不法之徒得以嚣张，其实职能部门也有监管不利和打击不严的问题：我们建议对中介的管理要行之有效，以免消费者在上当受骗。
Drugs of beta-hydroxy-beta-methylglutaryl coenzyme A reductase inhibitors family are usually used as a very effective lipid-lowering preparations but they simultaneously block biosynthesis of both cholesterol and ubiquinone Q10, which is an intermediate electron carrier in the mitochondrial respiratory chain. It is known that reduced form of ubiquinone Q10 acts in the human LDL as very effective natural antioxidant.
HMG-CoA还原酶抑制剂是非常有效的降脂药物，但它同时抑制胆固醇和辅酶Q的生物合成，而其中辅酶Q是线粒体呼吸链中的中间电子载体，其还原形式在人LDL中是有效的天然抗氧化剂。
Host system data files are written directly to a large erase block flash memory system with a unique identification of each file and offsets of data within the file but without the use of any intermediate logical addresses or a virtual address space for the memory.
使用每一文件的唯一标识以及数据在文件内的偏移量、但不使用任何中间逻辑地址或存储器的虚拟地址空间，将主机系统数据文件直接写入至大的擦除区块闪速存储器系统中。
The system includes work process in Field area chart(transfer of hull sections, assembly of interim Products, assembled of block, and so on), the information sharing of the intermediate goods information in the operation plant, the technology state information, the closure state, the stacking state of materials the capabilities of the equipment are realized, so as to the network technical support for LAN C/S database query.
系统主要实现中间产品在场区图上的作业过程操作(包括分段内外场的运转，中间产品的组装，总段的合拢等)，作业区域放置信息、工艺状态信息、合拢状态、物料堆放状态、设备能力、生产计划的信息集成与共享，网络技术支持为局域网内C/S数据库查询。
Because of the northward compressing of Indian plate, the subduction along the south edge of Lhasa block was stronger. The volcanic magma activities were extensive, producing abundant intermediate-acid calcium alkaline island arc igneous rocks.
由于印度板块向北强烈推挤，沿拉萨地体南缘的俯冲消减活动更加强烈，火山岩浆活动十分广泛，进一步形成了大量中酸性的钙碱性岛弧岩浆岩，如桑日岛弧等。
But the latter inserts the watermark to the high frequency or the intermediate frequency strip of the image DCT block, which obtains the transformation territory half frail watermark after the DCT inverse transformation.
而后者是将水印嵌入到图像DCT块的高频或中频部分，再经过DCT反变换得到变换域半脆弱水印。
From the view of intermediate frequency sampling. This paper introduces theory of intermediate frequency sampling, and composition and implementation block diagram of QPSK demodulation.
从中频采样出发，介绍了中频采样理论以及QPSK解调的组成和实现框图，同时也对2种采样方式进行了性能比较。
To utilization of the programmable resources, another resource BRAM (Block RAM) in the FPGA is used as intermediate data storage media to reducing the use of FPGA programmable resources Slices.
在可编程资源的利用率上，使用FPGA上的BlockRAM作为中间数据的存储介质，降低了FPGA编程资源Slices的使用。
In order to minimize the total cost of electric power, the dividing line between intermediate load block and peak load block is fixed by an optimization process and later unit recommitment is necessary to achieve the final optimizing results.
为了实现总体的购电费用最小，算法中对于腰荷段和峰荷段的分界点是通过优化来决定的，同时重新优化组合基荷机组，以便于实现总体的优化方案。
Through using the periodic property of DCT coefficients and the digital image scrambling transformation namely Zigzag Scan, the latter proposes a meaningful binary watermarking image embedding algorithm on block DCT intermediate frequency AC coefficients of the original image.
基于DCT系数特性的盲水印，利用分块DCT系数的周期特性，结合Z字形编码置乱技术，提出一种在宿主图像的中频交流系数上嵌入二值水印图像的方案。
Dimethyl carbonate (DMC), as an important green chemical intermediate, has considerable potential for green chemicals synthesis, and is known as a new benign building block of organic synthesis in the new century.
碳酸二甲酯（DMC）是重要的绿色化工产品，具有广泛的应用前景，被誉为21世纪有机合成的新基块。
Integral image as an intermediate image representation can be used to calculate the sum of gray level in rectangle quickly. A novel partial matching error function was presented based on sub block mean.
根据积分图像对匹配误差函数进行变形，提出了一种新的局部匹配误差函数&基于子块均值的匹配误差函数。
The bandpass sigma-delta modulator (BP DSM, for short) is the key block of the digital IF receiver. It digitizes the analog signal at an intermediate frequency, together with the digital decimation filter.
高性能带通sigma-delta调制器是数字中频接收机的核心模块，它和数字降采样滤波器一起完成对中频信号的数字化处理。
The regions with rich lead-zinc deposit in Tibet are: The Sanjiang area of eastern Tibet is a merging composite orogenic belt of some stable block and three island arc of the collusion orogenic belt with violent magmatic activities, almost constructed with intermediate-acidic intrusive rocks.
藏东三江地带是若干稳定地块与三条岛弧碰撞造山带镶嵌拼合的巨型复合造山带，区内岩浆活动剧烈，以中酸性侵入岩为主。
The use of NDIS intermediate driver layer of the intercept data packets, because NDIS intermediate driver layer in the data link layer and network layer, which can completely block all access to the host of the packet.
采用NDIS中间层驱动程序实现数据包的拦截，因为NDIS中间层驱动程序工作在数据链路层与网络层之间，可以彻底的拦截所有进出主机的数据包。
It describes the algorithms to mark parts number, alter parts number, generate item block and output the intermediate files for integration of CAD/PDM under the environment of AUTOCAD.
介绍了在AUTOCAD环境下，实现件号标注、件号标注修改、明细表生成、输出CAD/PDM中间文件的有关技术与算法。
It is shown that the stress regime in Block 84 is characterized by the maximum and intermediate principal stresses being horizontal and the minimum principal stress being vertical.
其结果表明，杜84块油层受构造应力状态为最大和中间主应力近水平，最小主应力垂直。
β - hydroxy ester with optical activity, whose enantiomer was often used as chiral block in the organic synthesis and intermediate for drug production, was one of the important compounds.
具有光学活性的β-羟基酯类化合物是一类重要的化合物，其对映体通常被用来作为有机合成的手性砌块，或作为合成一些天然化合物和药物的中间体。
In order to control styrene composition and block molecular weight, styrene reversible addition-fragmentation chain transfer, bulk and mini-emulsion polymerization processes were performed with 1-phenylethyl phenyldithioacetateduring styrene homopolymerization and copolymerization with other monomers. For styrene bulk RAFT polymerization, retardation was not important because the cross-termination rate of propagating radical with intermediate radical was much slower than the termination rate of double propagating radicals.
为了实现可逆加成-断裂链转移聚合过程中，苯乙烯均聚、高分子量聚苯乙烯的合成及苯乙烯与其他单体共聚时，对苯乙烯转化率、共聚时组成和分子量大小的控制，进行了二硫代苯乙酸-1-苯基乙酯调控苯乙烯本体和细乳液聚合动力学分析。