官能团

A new type of difunctional initiator (benzyl dibromide, ethyl dibromoacetate) was proposed in this paper and used to synthesize poly based triblock copolymers such as PSt-PBA-PSt, PMMA-PBA-PMMA.

本论文提出一种新型ATRP双官能团引发剂(如α，α-二溴化苄、α，α-二溴乙酸乙酯)，并用聚合反应速度法、GPC法、核磁分析法进行双官能度的验证，并通过两步聚合合成以聚丙烯酸酯为中间嵌段、苯乙烯或甲基丙烯酸甲酯为两端嵌段的ABA型三嵌段共聚物。

The relationship of HLB value of dispersant and the performance of ultra-fine pigment was further studied in this dissertation.

本课题还对阳离子分散剂的HLB值和超细颜料性能之间的关系，以及不同阳离子超细颜料的色度值与分散剂官能团的关系作了研究。

SEM result indicates that the mycelium on the surface of ectoblast of Nocardia cell is the important attachable site. IR spectrum shows that the functional groups such as —OH,—NH2, C==O, P==O, S==O, etc make vital contribution on adsorption process.

扫描电镜检测结果表明，诺卡氏菌细胞表面的菌丝是重要的吸附部位；红外光谱分析结果表明，诺卡氏菌表面含有—OH、—NH2、 C==O、 P==O、 S==O等活性官能团，它们在吸附过程中起重要作用。

The functional groups which are placed at 4-position of pyridine-2,6-dicarboxylic acid can effect the electron cloud of the lanthanide complexes.

吡啶-2，6-二甲酸的4位取代官能团能影响配合物的电子云形状，配合物的荧光性能和电子能量传递密切相关。

A novel rearrangement reaction of enol ester epoxide upon treatment of methoxide was first discovered, which could generate two key essential functions for ring cyclization, C5-OH and 7, 11-double bond in one step.

烯醇酯环氧化物在甲醇钠处理下一步反应派生出两个关环所需的重要官能团：C5-OH和7，11-双键；2。

The efficient first asymmetric syntheses of-6β-hydroxy-7αH-eudesm-4-en-3-one, and its C-6 epimer were achieved starting from-dihydrocarvone, whichprovide a novel and efficient synthetic method to 6-oxgenated eudesmanes.

以-二氢香芹酮为原料，经五步反应，首次完成了6β-羟基-4(5)-烯-3-羰基桉烷及其6位差向异构体的立体选择合成，并为C-6位含氧官能团取代桉烷类化合物的合成提供了一种简便有效的方法。

As a result, the yield of acetylene will exceed its concentration in equilibrium system.

考虑C_2H官能团的复合作用，根据乙炔浓度最大化的原则，本文通过数值模拟选定最佳的反应条件为C／H=1／2、反应温度3200—4100K。

In Chapter four,we investigate the effect of different side groups,anchoring groups(dithiocarboxylate and thiol group),torsion angle and external electric field on the electronic transport properties of 4,4′-biphenyldithiolmolecular junction.

第四章中我们主要系统地研究了官能团、不同的连接方式、分子间的扭转角以及外电场对4，4\'-二巯基联苯分子的电输运性质的影响。

The flotation mechanism of MG reverse-floating dolomite was studied by measuring the Zeta-potential of collophanite and dolomite, Infrared Absorptions Spectra analysing the adsorption of MG onto the minerals surface, ultraviolet- visible light absorbing spectrum calculating the amount of MG which was adsorbed onto the minerals surface. These researches showed that MG was more easyly adsorded onto the surface of dolomite in feeble acidic solution because of pure dolomite charges positive as well as pure collophanite charges negative. Therefore, a lot of MG negative ions was adsorded onto dolomite, and that MG negative ions contained hydrophobic group, the hydrophobicity of dolomite was modified, the grains of dolomite were adhered to air bubble and float with them.

对白云石和胶磷矿的Zeta-电位测定、红外光谱分析MG药剂在矿物上面的吸附情况、紫外-可见吸收光谱测定矿物上MG的吸附量等，研究了MG药剂反浮选白云石的浮选作用机理，表明在弱酸性条件下，由于白云石表面荷正电而胶磷矿表面荷负电，带有羧基和羟基官能团的MG药剂更容易吸附在白云石上，使其周围吸附有大量的MG负离子，而MG负离子的另一端为烃基，这就改变了白云石的疏水性，使其矿粒容易附着于气泡上浮。

The chemical stability of Vanisperse-A sodium lignosulphonate in the electrolytic enviroment simulating the floating charge of lead-acid battery was studied.

研究了Vanisperse-A木质素磺酸钠在模拟铅酸电池浮充的电解环境下的化学稳定性，利用UV-Vis和FT-IR光谱，分析了木钠分子中某些官能团的变化情况。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。