基侧的

But they can be explained satisfactorily by considering the influence of side-groups of the donor and acceptor.

但如果同时考虑侧基的影响则能满意地解释这些现象。

Polyethersulfone with cardo was a developed engineering thermoplastic and membrane material with high glass transition temperature,PES-C ultrafiltration membranes were prepared by phase inversion method using dimethylacetamide as solvent and oxalic acid and polyethylene glycol as additives.The membrane morphology forming and evolution could be observed by the experimental system and method.The effect of additive and polymer concentration on cast solution and the gelation kinetics of polyethersulfone with cardo asymmetric membrane were studied.

采用耐高温工程塑料——含酚酞侧基的聚芳醚砜为膜材料，草酸和聚乙二醇为添加剂， N，N -二甲基乙酰胺为溶剂，并利用改进的凝胶动力学实验装置和方法，使之能真实地再现不同膜孔结构生长及发展演化的过程，借助相关软件对图像进行处理，考察了添加剂、聚合物浓度对铸膜液凝胶速度的影响，对酚酞基聚芳醚砜非对称膜的凝胶过程的动力学进行研究。

Three reference current detecting methods are presented for single-phase active power filter, i.e. fundamental current detecting method based on parallel resonance of passive LC filter, fundamental current detecting method based on switched-capacitor filter, harmonic current detecting method based on d-q transformation and its improved circuits.

同样通过采用并联变压器二次侧多补偿绕组的结构来提高有源电力滤波器的容量。4、提出三种单相有源电力滤波器指令电流的提取方法，即基于LC并联谐振的基波电流检测方法、基于开关电容滤波器的基波电流检测方法、基于单相d-q变换的谐波电流检测方法及其改进电路。

Research progresses in the oganoboron π-conjugated materials are reviewed in this paper, in terms of the molecular structures of the π-conjugated systems, including the linear π-conjugated systems with boryl groups at the terminal positions, the starburst π-conjugated systems containing boron atoms at the center, the polymeric π-conjugated systems containing boron atoms in the main chain, the boron-bridged ring-fused π-conjugated systems, as well as the π-conjugated systems with boryl groups at the side positions.

本文根据π-共轭体系分子结构的不同，对有机硼π-共轭材料，包括硼取代基位于末端的线形π-共轭体系、硼原子位于中心的星形π-共轭体系、硼原子位于主链的π-共轭聚合物体系、硼原子桥联的并环π-共轭体系以及硼取代基位于侧链的π-共轭体系等的研究进展进行了综述，并进一步对该领域的发展前景进行展望。

Here we introduced oxadiazole moiety to theside-chain of Ph-PPV to enhance the electron transport properties. The luminescenceefficiency and luminescence brightness (1.33cd/A, 9400 cd/m~2) of the Ph-PPV withside oxadiazole moiety are much higher than non-oxadiazole Ph-PPV (0.70 cd/A,2300 cd/m~2), and these polymers emitted green light which unaffected by theintroduction of oxadiazole moiety. Anthracene has a rigidity and planar structure which shows high photoluminescenceand thermo-stability.

结果表明，以十烷氧基作为间隔基使噁二唑单元键接在苯基取代PPV的侧链，所得材料制备的电致发光器件的效率和亮度(1.33cd／A，9400 cd／m~2)明显高于不含噁二唑单元的苯基取代PPV(0.70 cd／A，2300 cd／m~2)，噁二唑单元的引入并不影响材料的发光光色，膜状态下的荧光发射光谱和电致发光光谱均呈绿光发射。

As CAAX-mimetics, 1, 3-dihydro-5-phenyl-2-H-1, 4-benzodiazepin-2-one was modified by linking carboxyl groups with various carbon through N-1 and C-3, 3-(imidazol-4-yl) propion amido group with different substituents was connected at C-7; In the synthesis of bisubstrate analogues, thiocarbamido compounds was alkylated by alkyl iodide and then hydrolyzed to give alkylthiol benzoate compounds.

1，4-苯并二氮杂草-2-酮类化合物的合成过程中分别对其1、3、4和7位进行了基团变化，在1和3位连接不同长度含羧基或酯基的侧链，在7位连接不同取代的咪唑丙酰氨基。在苯甲酸硫醇酯化合物合成过程中，建立了一种硫原子连有不同长度碳链的苯甲酸硫醇酯的合成方法。

Place short and long food chips in posterior occlusion of unilateral left side. When the masticated load was 3、5、7 kg, the displacement of abutments was measured by a LB-high sensitive laser transferring detector to calculate displacement, inclination and torsion of the abutment in mesial-distal, labial lingual and vertical and horizontal directions.

分别在左侧后牙区放置长、短食物片的咬合状态下，负载3 kg、5 kg、7 kg咬合力时，用高精度半导体激光位移测量仪测量并计算出同侧基牙在近远中向、颊舌向的水平位移和倾斜、垂直向的位移和水平旋转，统计分析不同牙尖斜度对基牙位移的影响。

To improve the effect of CDCA on dissolving cholesterol gallstone, the water-soluble copolymers as polycarboxylic acid of comb-like copolymers and C_(60)-PCC were synthesized, which being used for modification of CDCA and strengthening effects of CDCA on dissolving the cholesterol gallstones by their entropy-repelled properties of comb-shaped side chains in buffers of phosphate and in model bile.The design theory of polymer was mainly employed to synthesis the conjugate of PCC-CDCA and C_(60)-PCC-CDCA by C_(60), polyoxyalkylene allylalkyldiether and maleic anhydride, which were copolymerized with AIBN as initiator, and then PCC or C_(60)-PCC were reacted with CDCA. The structures of the copolymers and the conjugates of PCC-CDCA and C_(60)-PCC-CDCA were confirmed with IR, TLC and TEM. The dissolving effects and the dissolution kinetics mechanism of cholesterol gallstone was inverstigated in PBS and in model bile of different cholesterol saturated index at pH7.4, including PCC-CDCA or C_(60)-PCC-CDCA.

利用高分子设计理论，以烯丙基聚氧乙烯基醚、顺丁烯二酸酐、C_(60)和CDCA为原料，以偶氮二异丁腈为引发剂，合成具有梳状侧链结构的梳状共聚物-CDCA结合物和C_(60)-梳状共聚物-CDCA结合物，以IR、TLC和TEM法表征共聚物的结构，并在pH7.4的PBS液和不同胆固醇饱和指数的模拟胆汁中进行溶石效果的研究，探讨在PBS液和不同CSI的模拟胆汁中结合物溶解胆固醇结石的效果和溶解动力学机制。

The recent progress in molecular design and synthesis of polyborosilazane precurosors for SiBCN ceramics is reviewed.Especially the borazine modified polyborosilazane,monofunctional borane modified polyborosilazane on side chai...

本文分4个方面，即基于硼吖嗪的聚硼硅氮烷、侧基含有环硼氮烷或单硼烷的聚硼硅氮烷、基于多官能硼烷构筑的聚硅氮烷和含硼聚硅基碳化二亚胺，从聚硼硅氮烷分子结构设计、改性、合成及在多维尺寸材料中初步应用的角度综述了该领域国内外研究的新进展，指出了聚硼硅氮烷陶瓷前驱体设计合成研究发展中值得关注的新方向。

In this report, half-esterification between these pendent hydroxyl groups of hydroxyl-PU and maleic anhydride could lead to new pendent groups, carboxylic groups. These highly polar carboxylic groups in the side chain of PU could play the role of internal emulsifier. They had self-dissociation ability in the water or were neutralized first by appropriate amount of base. Then, PU bearing carboxylic group could dispersed steadily in the water, named aqueous-based polyurethane dispersion.

在本论文中，利用原来亲油性Hydroxyl PU主链段上悬挂的羟基经由与琥珀酸酐的半酯化(Half-esterification Reaction)反应后，使PU在侧链上悬挂具有强极性的羧酸基，其可作为聚胺酯分子中的内乳化剂，羧酸基能在水相中自身解离产生离子或加入适量碱使之中合，使聚氨酯高分子能够稳定分散於水中，即所谓水性PU分散液(Aqueous-based Polyurethane Dispersion)。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐