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Experimental process: jing and 3- methyl -2- methyl ethyl ketonesynthesizes by the benzene zong; Again the glacial acetic acidcatalysis produces 2, 3, 3 - trimethyl - 3H - yinduo; Again has thealkylate response production yinduo iodide after the methyl iodide;The iodide takes off molecular HI under NaOH to become freejier thealkali; Adds 5 - nitryls salicylic aldehydes in the ethyl alcohol forthe solvent under if to respond finally produces 6 '- the nitryl yinduolin spiral benzene and pinan; Through the infrared spectrum andthe ultimate analysis irrevocably proved its structure, and studiedthe annulus with to open the annulus the light to send changes colorthe performance, explained in different solvent medium ultravioletabsorption spectrometry solvent effect, and the comparisondiscoloration the response speed number difference, finally mixed itadds to the methyl methacrylate, the peroxidation benzoin formyl in the plexiglass, tested 6 '- the nitryl yinduolin spiralbenzene and pinan in the glass fatigue resistance, thethermostability.

实验过程:由苯肼和3-甲基-2-丁酮合成腙;再冰醋酸催化生成2 ,3 ,3—三甲基—3H—吲哚;再经过碘甲烷发生烷基化反应生成吲哚碘化物;碘化物在NaOH下脱去一分子HI成为费歇尔碱;在乙醇为溶剂下加5-硝基水杨醛与其反应最后生成6'—硝基吲哚啉螺苯并吡喃;通过红外光谱和元素分析确证其结构,并研究了环体与开环体的光致变色性能,解释了在不同溶剂介质中紫外吸收光谱的溶剂效应,并比较褪色反应速率数的差异,最后将其掺加到甲基丙烯酸甲酯,过氧化二苯甲酰有机玻璃中,测试6'—硝基吲哚啉螺苯并吡喃在玻璃中的抗疲劳性、热稳定性。

RESULTS: The interobserver accuracy was 100% between observers for identifying the AM, hyoid bone, thyroid cartilage, and cricothyroid membrane, and 93% for carotid tubercle.

结果:用下颌角、舌骨、甲状软骨和环甲膜进行辨识,目标观察物的准确度为100%,颈动脉结节为93%。

According to the contrasts between the structure of PANI and that of POT, the conclusion could be made that steric hinderance effect of methyl groups in the poly-O-methylaniline is more prominent than induction effect and hyperconjugation.

比较聚苯胺和聚邻甲苯胺的结构可知,甲基取代苯环中的一个氢原子后,甲基对聚邻甲苯胺的空间位阻效应明显大于诱导效应和超共轭效应。

We get to see a closer look at his armor, which appears to be ringed leather.

我们可以靠近观看他的护甲,看起来是带环扣的皮革甲。

In these chromophores, the ring-locked triene employed as a conjugation bridge and the thiobarbituric acid moiety was as an electron acceptor in a D-π-A units.

在这些发色团中,环锁定的三烯和9,10-二氢蒽用作共轭桥,巴比妥酸和甲氧其分别作为吸电子和给电子基,组成非共轭的两个D-π-A单位。

METHODS: Mono-6-O-tosyl-β-CD and mono-6-formyl-β-CD were synthesized separately. Silylatedβ-CD was loaded onto polymer chain of PVA by acetalization to produce PVA containingβ-CD linear high polymer.

分别合成单6-对甲基苯磺酰β-环糊精酯和单6-甲酰基β-环糊精,利用缩醛化反应将醛基化β-环糊精固载到聚乙烯醇大分子链上,合成出聚乙烯醇固载β-环糊精的线性环糊精高分子。

During minitracheostomy the identification of cricothyroid membrane may not be easy in a post-radiotherapy patient with severe subcutaneous fibrosis.

若患者曾接受过放射线治疗而造成严重的皮下组织纤维化,进行迷你气管造口术时可能不易确认环甲状膜的位置。

The results show that during oxidation, a methoxyl group in the ligand ring broke, and the phenoxy- and water-bridged Cu complex formed.

实验结果表明:在Cu配合物氧化过程中,能使配体环上的一个甲氧基发生断裂,形成苯氧桥和水桥联的Cu配合物。

The electron impact mass spectra of noncyclic crown ether s with heterocyclic methmazole as terminal groups 1a ̄4a and fo were given and discussed in the present article.

本文给出以杂环甲巯咪唑为端基的非环冠醚1a~4a及1a的异构体1b的电子轰击质谱并讨论之。

We inoculated rhesus macaques by thyrocricoid puncture and observed the clinical signs, pathologic changes and so on in a short period.

利用1株鹅源性H5N1流感病毒经环甲膜穿刺接种恒河猴,通过观察恒河猴在接种后短期内各项指标的变化来评价呼吸道吸入法接种恒河猴感染H5N1流感病毒的可行性。

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