二聚体

After tail iv injection, the blood exposure time of stealth liposomes and the area under blood drug concentration-time curve were pronouncedly increased, compared with the regular liposomes group and the free doxorubicin group,respectively.

以化学梯度法包封脂质体，用两亲性聚乙二醇-二硬脂酰磷脂酰乙醇胺对脂质体膜进行修饰以制备隐形脂质体；用HPLC-UV法测定给药后小鼠体内组织中的药物浓度。

A method for the preparation of microcellular elastomeric polyurethane foams from a reaction mixture comprising a polyisocyanate component containing at least 85% by weight of 4,4'-diphenylmethane diisocyanate or a variant thereof, a polyol composition comprising at least one polyoxyalkylene polyol having an average nominal hydroxyl functionality of from 2 to 6, an average hydroxyl equivalent weight of at least 1300 and an average oxyethylene content of between 50 and 85% by weight, water, a chain extender having an average hydroxyl equivalent weight of from 15 to 250 and optionally a crosslinking agent, the hardblock-content being more than 45% by weight.

本发明是有关一种制备微孔弹性聚氨基甲酸酯泡沫体的方法，其反应混合物包括：一种含至少85重量％的4，4′－二苯甲烷二异氰酸酯或其变体的聚异氰酸酯组分，一种多元醇组合物，其包含至少一种平均标称羟基官能度从2至6、平均羟基当量至少1300且平均氧乙烯含量介于50至85重量％之间的聚氧亚烷基多元醇，水，一种平均羟基当量为15至250之增链剂，以及视需要使用的交联剂，该硬性嵌段－含量（hardblock-content）大于45重量％。

The copolycondensation type polyamic acid was synthesized by using 3,3', 4,4'-Benzophenonetetracarboxylic dianhydride as the dianhydride monomer, 4,4'-Diamino diphenylmethane and 4,4'-Oxydianiline as the diamine monomer under microwave irradiation in Dimethylformamide.

在微波辐射条件下，采用3，3'，4，4'-二苯酮四羧酸二酐、4，4'-二氨基二苯甲烷和4，4'-二氨基二苯醚为单体，N，N'-二甲基甲酰胺为溶剂，低温合成一种共缩聚聚酰亚胺的前驱体聚酰胺酸，化学亚胺化脱水环化生成BTDA型共缩聚聚酰亚胺。

Polyethylene glycol ethers of alkyl alcohols having the general formula CH3(CH2)xCH2(OCH2CH2)nOH wherein x is 8 to 20 (of which ceteareth-20, steareth-20 and steareth-100 are preferred), poloxamer 185, poloxamer 407, N,N-dimethyl dodecylamine N-oxide, and mixtures thereof, are employed to increase follicular delivery and/or follicular residence time of certain water soluble ornithine decarboxylase inhibitors of which 2-2,5-diamino pentanoic acid and its pharmaceutically acceptable salts, hydrates, optical enantiomers and racemic mixture are preferred.

使用通式为CH3(CH2)xCH2(OCH2CH2)nOH的烷基醇的聚乙二醇醚，其中x为8-20(其中鲸蜡硬脂醇醚-20、硬脂醇醚-20和硬脂醇醚-100是优选的)、poloxamer 185、poloxamer 407、N，N-二甲基十二烷胺N-氧化物及其混合物来提高某些水溶性的鸟氨酸脱羧酶抑制剂的毛囊传输和/或毛囊停留时间，优选的抑制剂是2--2，5-二氨基戊酸及其药学上可接受的盐、水合物、光学对映异构体及外消旋混合物。

The molecular designs and synthesis of triarylamine-based picolinic acid derivatives used as ancillary ligands, and their cyclometalated iridium complexes used as red-and green-emitters, as well as optoelectronics properites of these compounds were investigated in order to solve current problems of organic/polymeric electroluminescent materials and devices.

本论文针对目前有机/聚合物电致磷光材料和器件存在的问题，开展了新型三芳胺吡啶羧酸类辅助配体及其红光和绿光环金属铱配合物电致磷光材料的分子设计、合成和光电性能研究，主要包括：(1)设计、合成了三种新型的三芳胺吡啶羧酸类双齿阴离子型辅助配体；(2)以三芳胺吡啶羧酸衍生物作为双齿阴离子型辅助配体，合成得到了两个系列的红光和绿光环金属铱配合物；(3)研究了三芳胺吡啶羧酸类辅助配体分子结构对环金属配合物的紫外吸收和光致发光性能的影响；(4)以环金属配合物为客体，聚芴和恶二唑衍生物为主体，制作了聚合物电磷光器件，研究了含三芳胺吡啶羧酸类辅助配体、环金属配合物客体材料和聚合物主体材料等分子结构对电致发光性能的影响。

A novel polymer of Poly(diglycidyl maleate-co-stearyl methacrylate) was synthesized and its structure was characterized by ~1H NMR. Its self-assembly behavior was studied in different solvents. It was found that vesicles and tubule-liked aggregates can be obtained through self-assembly of P(DGMA-co-SMA)/THF/EtOH system. And spheral aggregates were obtained in P(DGMA-co-SMA)/THF/H_2O system while the spheral aggregates were converted into rod-liked aggregates and line-liked aggregates after aged for different time.

合成了带含环氧基侧链和十八烷基侧链的聚(马来酸二缩水甘油酯-co-甲基丙烯酸十八酯)，用~1H NMR对所得的共聚物进行了表征；研究了其在选择性溶剂中的自组装行为，发现P(DGMA-co-SMA)／THF／EtOH体系可以通过自组装形成囊泡形自组装体和支化的管状自组装体，P(DGMA-co-SMA)／THF／H_2O体系最初自组装形成球形自组装体，随着陈化时间的延长，球形自组装体逐渐融合成长条形自组装体和线形自组装体；探讨了自组装过程的机理，建立了可能的自组装过程模型。

In this paper a series of multiblock copolymers were synthesized by polycondensation of poly , phthalic anhydride and epoxy resin in the presence of triethyl benzyl ammonium chloride as the catalyst.

以三乙基苄基氯化铵为催化剂，将聚乙二醇、邻苯二甲酸酐和环氧树脂进行共缩聚，制得聚乙二醇-环氧树脂系列多嵌段共聚体。

In-situ synthesis process was used to prepare copper nanoparticles and coppernanoparticles-polyethylene glycol oil solution by reduction of copper acetate by glycol in polyethylene glycol containing amido ligand as dispersant.

采用原位合成法以聚乙二醇400作为反应介质，以氢氧化钠和氨基配体作为分散剂，用乙二醇还原六水合乙酸铜制备出纳米Cu粉和纳米Cu聚乙二醇溶液，用X射线衍射仪和透射电子显微镜表征其结构，在四球摩擦磨损试验机上评价了含不同质量分数纳米铜粉的聚乙二醇溶液的摩擦磨损性能，并与分散剂进行对比。

AtDFA is dihydrofolate synthase localized in mitochondria, it catalyzes one glutamate added to the dihydropteroate and produces dihydrofolat. AtDFB, AtDFC and AtDFD are folylpolyglutamate synthase localized in plastid, mitochondria and cytosol respectively. A short chain ofγ-linked glutamates can be added by FPGS.Folate molecules exist in vivo mainly as polyglutamates and these are preferred by folate-dependent enzymes.

AtDFA为二氢叶酸合成酶(dihydrofolate synthase，DHFS)，定位于线粒体，在它的催化作用下，一个谷氨酸分子与二氢蝶酸(dihydropteroate ， DHP)相结合，形成二氢叶酸；AtDFB、AtDFC、AtDFD为多聚谷氨酸合成酶(folylpolyglutamate synthase，FPGS)，分别定位于质体、线粒体和细胞质，在多聚谷氨酸合成酶的作用下，谷氨酸分子可以逐一连接到四氢叶酸的谷氨酸γ位。

In this study, Japanese cedar, Ma bamboo and Makino bamboo were liquefied in polyethylene glycol/glycerol co-solvent with H2SO4 or HCl as catalyst. The liquefied woody materials were blended with PMDI (4,4'-Diphenylmethane diisocyanate;MDI) to prepare the PU foams. The effects of preparation conditions of PU resin on the properties of PU foams were investigated.

中文摘要本研究将柳杉(Cryptomeria japonica； Japanese cedar)、麻竹(Dendrocalamus latiflorus； Ma bamboo)及桂竹(Phyllostachys makinoi； Makino bamboo)等木质材料以聚乙二醇及丙三醇之混合液为溶剂，H2SO4及HCl为催化剂进行液化处理，并将其液化木质材料与4，4'-二苯甲烷二异氰酸酯反应制造聚胺基甲酸酯发泡体，探讨PU树脂调配条件对PU发泡体性质之影响。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。