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A series of diazonium salts of 4-(N-methyl-N-phenylamino)-3-amino-1,8-naphthalic anhydride 5a, its naphthalimide derivative 5b, and 5e were designed and synthesized,and it was the first time to discover that aromatic radical-induced intramolecular aromatic 1, 5-hydrogen transfer was also involved in the nitrogen-contianed system during Pschorr cyclization.

实验设计合成了4--3-氨基-1,8-萘酐的重氮盐5a、其衍生物N-丁基-4--3-氨基-1,8-萘酰亚胺的重氮盐5b和N--4--3-氨基-1,8-萘酰亚胺的重氮盐5c,并首次发现了通过普朔尔环化反应以氮甲基化的氮为桥原子的体系存在着芳香自由基诱导的芳香1,5-氢转移。

A large molecular sizing agent modified AKD was prepared through the reaction between alkyl ketene dimmer and polyamide then cationization by epichlorohydrin. The large molecular sizing agent has high positive charge and emulsifiability.

摘 要:将聚酰胺多胺与AKD反应,并用环氧氯丙烷将其阳离子化,制备出一种具有高阳电荷的改性AKD大分子,并在中、碱性条件下用该改性AKD对漂白硫酸盐阔叶木浆进行施胶。

Ethanolamines are commonly made by the method of reacting aqueous ammonia and ethylene oxide. Product profile, product quality and energy consumption are three key factors in ethanolamine process.

环氧乙烷氨解法是目前生产乙醇胺的主要方法,产品比例、产品质量及能耗是乙醇胺生产中的三个关键因素。

According to the selective standard of excluding and including cases,90 cases of malignant tumor were randomly divided into 3groups, Medical therapy group (30cases), Moxibustion with ginger group(30cases), A.S.T group (30cases) by using method of random number table. Three groups patients were accepted chemotherapy in vein or mouth given acute bone marrow depression drugs such as Cyclophosphamide,Nitrogen mustard (HN2),Methotrexate,Cytosine arabinosidee,Hydroxyurea,Cisplatin,Etoposide (VP-6),Vincristine etc.

根据本课题研究病例选择的纳入标准和排除标准,选择90例接受化疗的恶性肿瘤病例,通过查随机数字表法随机分为西药组,隔姜灸组和穴位贴敷组,各30例,三组患者都至少采用环磷酰胺,氮芥(HN2),甲胺蝶呤,阿糖胞苷,羟基脲,顺铂,长春碱类(VP-6),鬼臼毒类等急性骨髓抑制药物中的一种或一种以上通过静脉或口服给药进行化疗。

In one embodiment, the invention is a system for initiating free radical polymerization comprising: a in one part, one or more amido-borate compounds containing one or more anionic amido-borate moieties comprising an organoborate wherein the boron atom is bonded to a nitrogen atom of ammonia or an organic compound containing one or more nitrogen atoms, such as a hydrocarbyl amine, a hydrocarbyl polyamine, or an aromatic heterocycle containing one or more nitrogen atoms and optionally containing one or more heteroatoms or heteroatom containing functional moieties, and one or more cationic counter ions and b in a second part, a liberating compound which reacts with the nitrogen atom bound to the boron atom upon contact with the amido-borate to form an organoborane radical.

在一个实施方案中,本发明是引发自由基聚合的体系,包括:a在一个部分中,一种或多种含有一个或多个包含有机硼酸根的阴离子酰氨基-硼酸盐部分和一个或多个阳离子抗衡离子的酰氨基-硼酸盐化合物,其中的硼原子键合到氨的氮原子或含一个或多个氮原子的有机化合物,例如烃基胺、烃基聚胺或含一个或多个氮原子和任选含一个或多个杂原子或含杂原子的官能部分的芳族杂环的氮原子上,和b在第二部分中,在与酰氨基-硼酸盐接触时与键合到硼原子上的氮原子反应形成有机硼烷基团的释放化合物。

ZnO nanorings were prepared on a large scale by a facile solution-based method at 70 ℃ for 5 h via hexamethylenetetramine(C6H12N4) and Zn(NO3)2·2H2O as the raw materials in the presence of surfactant PAM-CTAC.

以六次甲基四胺(Hexamethylenetetramine, C6H12N4)和水合硝酸锌[Zn(NO3)2·2H2O]为原料,表面活性剂聚丙烯酰胺-氯化二烯丙基二甲基铵为形貌控制剂,采用液相沉淀法合成了ZnO纳米环。

The results revealed that the imine mechanism and hydroxylamine mechanism were both existed in the reaction.

结果表明,从量子化学角度分析,环己酮氨肟化反应的亚胺机理和羟胺机理均可以发生。

Enaminones are also valuable precursors for α-iodol enaminones, 3-amino sugar derivatives, azo-compounds,β-aminoketone, as well as tetrahydropentalenes, tetrahydroindenes, and hexahydroazulenes.

烯胺酮类化合物同时也是α-碘代烯胺酮类化合物、3-氨基糖衍生物类化合物、氮杂化合物、β-氨基衍生物类化合物和四氢并环戊二烯类化合物和四氢茚类化合物的重要前体。

Three N-pivot lariat ethers with picrylamino group as side arms have been prepared, and the selective coloration of above chromogenic ethers for alkalic metal salts and amines have been studied conveniently by UV-Vis spectra.

设计合成了三个具有分子隙缝的、以苦胺基为侧臂的N-支套索冠醚,利用其生色基和UV-Vis吸收光谱,简便地研究了冠环大小、键连基团对碱金属盐和有机胺选择变色作用的影响。

Chiral separation of nine enantiomers, which include lobeline, tropicamide, promethazine,propranolol, atenolol, cyclandelate, salbutamol, fenfluramine and benzhexol, has been for the first time achieved by nonaqueous capillary electrophoresis.

用非水毛细管电泳成功地分离了洛贝林、托吡卡胺、普萘洛尔、阿替洛尔、环扁桃酯、沙丁胺醇、苯海索、芬氟拉明和异丙嗪等9种手性化合物。

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推荐网络例句

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。