二聚的

The present invention discloses a polycarboxylic acid copolymer which is obtained by copolymerization of monomer components comprising a polyalkyleneimine unsaturated monomer (A2) and an unsaturated carboxylic acid monomer, the polyalkylene glycol unsaturated monomer (A2) having an oxyalkylene group bonded to a polyhydric alcohol residue, and the monomer component containing an unsaturated monocarboxylic acid monomer.

公开了一种多元羧酸共聚物，它是通过单体组分共聚制得的，所述单体组分包括聚二醇不饱和单体(A2)和不饱和一元羧酸单体，所述聚二醇不饱和单体(A2)具有使氧化烯基结合到多元醇残基上的结构，所述多元醇残基平均每个分子具有不少于3个羟基。

Two new kind of energy transfer donor-acceptor dyads consisting of α-naphthoic acid moiety and 9-aminoacridine units linked by tetraethylene glycol or triethylene glycol flexible chain have been synthesized.

本工作分别用聚三乙二醇及聚四乙二醇柔性链将α-萘甲酸酯与9-氨基吖啶连接起来，合成了两种新型二元发色团分子体系，在两个体系中，选择激发α-萘甲酸酯，都可以发生从α-萘甲酸酯到9-氨基吖啶的高效率的单重态-单重态能量传递。

The influence factors on decomposition efficiency, such as digestion time and pH were identified. It was shown that non-condensed phosphate could be decomposed completely by persulphate.

结果表明：在碱性条件下过二硫酸钾高温氧化可使海水中非聚磷类化合物完全回收，而聚磷类化合物回收率不高，延长消化时间聚磷类化合物的回收率有一定提高。

The influence factors on decomposition efficiency, such as digestion time and pH were identified. It was shown that non-condensed phosphate could be decomposed completely by persulphate. But in alkali condition, condensed phosphate can only be decomposed partly.

结果表明：在碱性条件下过二硫酸钾高温氧化可使海水中非聚磷类化合物完全回收，而聚磷类化合物回收率不高，延长消化时间聚磷类化合物的回收率有一定提高。

The influence factors on decomposition efficency, such as digestion time and pH were identified. It was shown that noncondition phosphate could be decomposed completely by persulphate. But in alkali condition, condensed phosphate could only be decomposed partly.

结果表明，在碱性条件下过二硫酸钾高温氧化可使海水中非聚磷类化合物完全回收，而聚磷类化合物回收率不高，延长消化时间聚磷类化合物的回收率有一定提高。

The bromo-polyethylenegylcol-monomethacrylate was synthesized by two steps. Firstly, methylacrylic acid was esterified with polyethylene glycol (PEG, M=200, 400) to give polyethyleneglycol-monomethacrylate Secondly, treatment of PEG-MA with phosphorus tribromide gave the aim product.

以聚乙二醉（M分别为200，400）和甲基丙烯酸进行单酯化反应，所得单酯再与三溴化磷进行溴化反应合成了一种新的两端具有功能团的不饱和溴化物，即溴代甲基丙烯酸单聚乙二醇酯。

First, N'-(4-aminophenyl)-N'-4-(5-phenyl-1,3,4-oxadiazol-2-ylphenylbenzene-1,4-diamine was prepared and polymerization was carried out by direct polycondensation with a series of dianhydrides to obtain polyimides containig triphenylamine units in the main chain and 1,3,4-oxadiazole moieties as pendent group.

首先合成新型双胺N'-(4-aminophenyl)-N'-4-(5-phenyl-1，3，4-oxadiazol-2-ylphenylbenzene-1，4-diamine后，与一系的芳香族二酐进聚缩合反应，可制得一系列三苯胺为主链且1，3，4-恶二唑为侧链的聚醯亚胺。

As superplasticizer , a series of comb-shaped copolymers of polycarboxylic acid were synthesized by polyoxyethylene allyl methyl diether, maleic anhydride, and styrene with different initiators,and esterified with PEO-n.

以聚氧乙烯甲基烯丙基二醚、顺丁烯二酸酐、苯乙烯等为共聚单体，采用不同引发剂，合成了一系列聚羧酸型梳状共聚物超分散剂，并以PEO n单酯化得酯化产物，研究了共聚物的结构、组成、添加量等对水泥粒子分散性能的影响。

The technology of separation and purification of the interesting protein was studied, centrifuge the sample and get the clear supernatant, remove protein by 50％ ethanol, concentrate by drying with freezing way, remove salt and pigment by dialysing, separation with G-50 and CM-cellulose52 column, concentrate by PEG6000, The purified sample was a single band after separation by SDS-PAGE.

研究了目的阿片肽的分离纯化工艺。发酵混合物经过离心取上清，乙醇沉淀去蛋白，冷冻干燥浓缩，透析除盐脱色，聚乙二醇6000反渗透浓缩，G-50柱分离，CM-cellulose52阳离子交换层析，聚乙二醇6000浓缩等步骤后得到了较纯的目的产物，目的产物在SDS-PAGE上呈现单一条带。

The effect of controlling microstickies in recycled newspaper pulp and the effect on the resultant paper property of some fixatives,including inorganic polyaluminum chloride,organic polyamine,polydiallydimethyl ammonium chloride,and high cationic starch,were investigated in this paper.

分别以聚合氯化铝、聚胺、聚二甲基二烯丙基氯化铵和高取代度阳离子淀粉作为固定剂，研究了它们对废纸浆中微胶黏物的控制效果及对纸页性能的影响。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。