二-十进制

Tgs are about 573 K for copolyimides based on pyromellitic dianhydride and 533—543 K for those based on 3,3′,4,4′-diphenylethertetra-carboxylic dianhydride and are almost independent of the chromophore loading level.

以刚性相对较大的均苯四甲酸二酐为二酐单体的PPI 的Tg在573 K左右；以二苯醚-3，3′，4，4′-四甲酸二酐为单体的OPI 的Tg在533～543 K之间，且基本与染料发色团含量无关。

In this paper, the third monomer 1,4- benzenediamine was introduced into the system of pyromellitic dianhydride and 4, 4-diamino diphenyl. Polyamic acid was synthesized in N-methyl pyrrolidone by solution polycondensation. The chemical structure of the polymer obtained was characterized by infrared spectrum. The dynamic viscosity and intrinsic viscosity were measured. Studies were mainly focused on the influences of monomer solid contents, monomer adding methods on intrinsic viscosity.

本实验在常用的均苯四酸二酐和4，4'—二氨基二苯醚聚酰亚胺体系中，引入第三单体对苯二胺，采用三元共聚的办法合成出聚酰胺酸溶液，对合成产物进行了分子结构的红外光谱分析以及特性粘数、动力学粘度的测试，并讨论了单体固含量、加入方式等对聚酰胺酸特性粘数的影响。

In this paper,pyromellitic dianhydride,1,2,3,4-cyclobutanetetracarboxylic dianhydride,4[(4-aminophenyl)-bis(4-methoxyphenyl)methyl]benzeneamine,4-hexyloxy-biphenyl-3′,5′-diaminobenzoate,and additive ADD-34 were used to synthesize four PIs.

文章用均苯四甲酸二酐，4[(4-氨基苯基)-二(4-甲氧基苯基)甲基]苯胺，1，2，3，4-环丁烷四羧酸二酐，4-己烷氧基联苯酚-3′，5′-二胺基苯甲酸酯和不同含量的添加剂制备了聚酰亚胺液晶取向剂。

Four hemicyanine derivatives,-N-(4-sulfobutyl)-4-[2-(4-N,N-dimethylamino-phenyl) etheny1] pyridinium (P1),-N-(4-sulfobutyl)-4-[2-(4-N,N-dimethylaminophenyl)-1,3-buteny1] pyridinium (P2),-N-(4-sulfobutyl)-4-2-(4-N,N-dimethylaminophenyl) ethenyll quinolinium (Q1) and-N-(4-sulfobutyl)-4-

合成了具有不同共轭链长度的吡啶盐类及喹啉盐类半菁染料-N-（4-磺酸丁基）-4-[2-4-N，N-二甲基氨基苯基）乙烯基]吡啶鎓盐(P1、-N-（4-磺酸丁基）-4-[2-4-N，N-二甲基氨基苯基）丁二烯基]吡啶鎓盐(P2、-N-（4-磺酸丁基）-4-[2-(4-N，N-二甲基氨基苯基)乙烯基]哇琳鎓盐(Q1)以及-N-（4-磺酸丁基）-4-[2-4-N，N-二甲基氨基苯基丁二烯基]喹啉鎓盐(Q2)。研究了它们的光物理性质，并将它们用作TiO2纳米晶电极的光敏化剂引入光电化学电池。

Second, residues in the reactive site of the inhibitor were replaced by the consensus substrate recognition sequence of furin, namely, Arg at P_1, Lys at P_2, Arg at P_4 and Arg at P_6. In addition, the P_7 residue Asp was substituted with Ala to avoid possible electrostatic interference with furin inhibition. Finally, the extra N and C terminal residues beyond the doubly conjugated disulfide loops were further truncated. However, all resultant synthetic peptides were found to be temporary inhibitors of furin and kexin during a prolonged incubation, with the scissile peptide bond between P1 and P'1 cleaved to different extents by the enzymes.

高活性、低分子量的furin酶抑制剂有可能发展成为新型的抗细菌内毒素和抗病毒感染的药物，我们以绿豆胰蛋白酶抑制剂Lys片段长链22肽为模板，设计了一系列能抑制furin和kexin活性的突变体，采用如下三种方法逐步优化：一、去除Lys片段长链三对二硫键中的一对，用Ser替换Cys，减少可能存在的二硫键错误配对；二、抑制剂的活性中心根据furin底物的专一性逐步改变，即P1、P2、P4和P6位分别变为Arg、Lys、Arg和Arg，同时为了避免P7 Asp和P6 Arg之间可能存在的相互作用，将P7位Asp替换为Ala；三、将两对二硫键形成的双环的外面5个氨基酸残基去除。

On the basis of above works, dibutyl sebacate and 1、2-cyclohexanedicarboxylic acid diisobutyl ester were chosen to be absorbents of MA according to the solubility and property of solvents.

第二：在前一部分工作基础上，考虑了溶解度测定结果和溶剂本身性质选择有机溶剂癸二酸二丁酯和溶剂六氢化邻苯二甲酸二异丁酯作为吸收顺酐的吸收剂。

The inhibition effects of di-(2-ethylhexyl)-sebacate on the corrosion behavior of reinforcing steel bar were investigated by electrochemical polarization curves and electrochemical impedance spectroscopy in simulated pore solution.

采用动电位极化曲线和电化学阻抗谱研究了癸二酸二异辛酯在模拟混凝土孔隙液中对钢筋的保护作用。癸二酸二异辛酯的加入导致混凝土钢筋的腐蚀电位正移，对钢筋的阳极电化学过程有抑制作用。

The liner for double-based propellant was prepared from HTPB,toluene diisocyanate,diisooctyl sebacate,1,4-butanediol and mica.

以端羟基聚丁二烯、癸二酸二异辛酯、1，4 丁二醇、绢云母、甲苯二异氰酸酯等为原材料，制备了双基药柱用包覆层。

In order to recycle extra caustic soda and increase purity of sebacic acid, the research work in this thesis includes: extra caustic soda recovery, purification of sebacic acid and determination of solubility of sebacic acid in water, ethanol, and ethanol aqueous solution.

但是，它的传统生产工艺中存在过量游离碱浪费，癸二酸产品纯度不高等问题。对此本文做了三方面的研究，包括改进癸二酸生产工艺回收过剩的游离碱；提纯癸二酸；测定癸二酸在乙醇、水、乙醇水溶液中溶解度。

Sebacic acid, decanedioic acidA trademark used for methamphetamine.

DOP 邻苯二甲酸二辛酯或邻苯二甲酸二

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷