二聚的

PLA grafted with PAA has been used as material for preparation of particles. Without using surfactant, and with dimethyl acetamide as solvent and with hexane containing 4% isopropanol as precipitation solution, PLA particles have been prepared with a diameter between 700 and 1250 nm.

聚乳酸接枝聚丙烯酸的高分子化合物，用於制备微粒，二甲基乙醯胺为使用之溶剂，己烷及4%异丙醇为所需之沉淀溶液，界面活性剂并未使用，所得微粒平均粒径大小为700-1250 nm。

To decrease maufacture costs and improve the ratio of efficiency and outlay.The not exensive emulsifier, hydrophobe and other adminicle were mixed with self-made polyesters, siloxane-polyester copolymers to obtain defoamers which be better than imported.And the factors in the process of compound were studied particularly and systemically.the prime project is as follows:the siloxane-polyester copolymer is synthesized with PPG2000,PEG400,1% hydrogen-containing Polyhydrosiloxanes, hexane diacid,which mol ratio of materials is 7:3:6:5.emulsifying agents are SP-60 and tw-60,the value of HLB is 8.5.its dosage is 5%.the concentration of control- bubble resin is 5%. the concentration of liquid hydrocarbon A is 20%.

为进一步降低消泡剂的生产成本，提高其使用时的效费比，采用价格低廉的乳化剂、疏水剂及其他助剂与所制聚醚酯、有机硅改性聚醚酯进行复配，制取了性能优于进口产品的优质消泡剂；并对复配工艺各要素进行了详细、系统的研究；最佳配方为：PPG2000、PEG400、含氢量1%的硅油，己二酸以物质的量之比为7：3：6：5制成的有机硅改性聚醚酯，乳化剂选择SP-60/TW-60组合、HLB值为8.5、用量5%，抑泡树脂用量5%，液态烃A用量20%，液态烃B用量10%，疏水剂用量15%～20%。

Fourthly, plasticized polymer electrolytes based on PEUU and poly were prepared by impregnating PEUU/PECH blend films with lithium salt/PC solution.

三。以带有醚氧链段的线性高分子—聚乙二醇型聚醚氨酯脲为离子导电相制备两相高分子电解质。

In this paper, the Fuzzy C-Means algorithm is used to classify large numbers of mass spectrum of SOA particles formed from photooxidation of 1,3,5-trimethylbenzene analyzed by ATOFMS.

本文介绍模糊聚类算法在苯系物二次有机气溶胶单粒子聚类分析中的成功运用。

The epoxidised cashew nut shell oil acrylate oligomer for UV curing materials was synthe- sized using epoxidised cashew nut shell oil and acrylic acid as main raw materials,N,N-dimethyl- benzylamine as catalyst and p-hydroxyanisole as inhibitor.

以N，N-二甲基苄胺作催化剂、对羟基苯甲醚作阻聚剂，环氧化腰果壳油和丙烯酸为主要原料合成了一种新型的紫外光固化预聚物——环氧化腰果壳油丙烯酸酯。

The initial three chapters of this dissertation aim to improve the regularity of ladderlike polysiloxane through strong H-bonding template and slowly dropping half water for hydrolysis and condensation.

本论文前三章旨在利用强氢键模板作用和半水量水解同步缩合脱氯化氢的改进方法首次合成了(1)高规整性、可溶的反应性含对苯二胺有机桥基的聚氢基硅氧烷高分子，29Si-NMR 图中显示梯形主链上硅原子-Si(HO2/2峰的基线宽度△1.0 ppm，这是至今文献报道的所有梯形聚硅氧烷规整性最好的数据；采用分段去撑法成功的合成了纯无机梯形聚氢基硅氧(来源：1bABC论文网www.abclunwen.com)烷。

Purified GO had a molecular weight between 145, 000 and 162, 300, as determined by Sephadex G-200 filtration and SDS-PAGE of the enzyme as cross-linked with glutaraldehyde. This result showed that the holoenzyme was a tetramer, and no change occurred in molecular weight of the enzyme during the s〓orage. The active form of GO from brassica leaves showed a constant molecular weight during purification, so did that from O. sativa leaves during greening of etiolated seedlings, maybe acting as a stable tetramer.

用Sephadex G-200胶过滤和戊二醛交联后的SDS-PAGE法测得纯化的菜心叶片GO的分子量在145，000-162，300间，为四聚体；并且在放置过程中其分子量和聚合态均保持不变，为稳定的四聚体；进一步研究表明菜心叶片GO在纯化过程中和水稻叶片GO在黄化苗的转绿过程中，两种GO活性状态的分子量和聚合态也没有发生变化，均呈四聚体。

In this paper, the synthesis of polyamide acid resin, with 4, 4′-diam-inodiphenyl ether and pyromellitic dianhyride as monomers and dimethylacetamide as solvent, is reported; the preparation of polyimide fiber from PAA resin by dry- spinning method is described; and the effects of various factors of operating conditions upon the mechanical properties of the fiber is discussed.

本文报导了用4，4′—二氨基二苯醚与苯均四酸酐作单体，在N，N′—二甲基乙酰胺溶剂中合成聚酰胺酸树脂，以及用该树脂经干纺法制备纤维和制备过程中各项参数对纤维力学性能的影响。

Results:The cell aggregations had differences in shape as well as size, flavone content, enzyme activities, growth speed and so forth. The flavone content of the smallest cell aggregation was approximately twice compared to the larger ones, and its malonaldehyde content, the phenylalanine ammonialyase and peroxide enzyme activities and recultivate curve presented the same change tendency.

结果：不同的细胞聚集体在形态大小、黄酮含量、酶的活性、生长速度等方面均存在着差异，其中颗粒最小的细胞聚集体黄酮含量约为颗粒较大的细胞聚集体的2倍，并且其丙二醛含量、苯丙氨酸解氨酶及过氧化物酶的活性及再培养曲线均具有相同的变化趋势。

Thermal imidization of the polyamic acid derived from BPADA and BAPS was investigated mainly by GPC and FTIR equipped with an in-situ hot cell.

利用GPC、原位FTIR测定了长链聚酰胺酸PAA由双酚A二酐与 4 ，4′-二(4-胺基苯氧基二苯酚制备的热环化过程。

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。