甲基

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。

38Compounds were identified in Brookes, representing 59.66% of the total peak area; The main contents were Alcohol , Hexyl acetate , Styrene , 1-ethyl -3- methyl –Benzene , 1,2,3-Trimethyl benzene.

从布鲁克斯中检测出38种香气成分占总峰面积的59.66 %，相对百分含量较高的是乙醇、乙酸己酯、1-乙基－3－甲基苯、苯乙烯、1，2，3－三甲基苯。

The two—step sulfomethy lation and the reaction with HOCH〓SO〓Na in sulfite cooking were illustrated in this paper. The optimum technological conditions were determined on the basis of suitable amount of HCHO in sulfite pulping. The differences of delignification and paper properties of wheat straw were also studied in SFP—AQ and alkaline sulfite and AQ cooking .

对麦草粉的两步法磺甲基化反应以及与羟甲基磺酸钠的反应进行了研究，解释了甲醛在亚硫酸盐蒸煮中脱木素作用机理，从理论上确定了甲醛在SFP—AQ蒸煮中的适宜用量，并据此提出了合理的蒸煮工艺和最佳工艺条件。

The formed long and linear chain alkyl benzene changes into benzene methyl and alkene through β-scission and monomolecular homolysis, and then benzene methyl shifts to the position of α-Carbon in the long chain alkyl benzene through H-transfers.

已形成的长直链烷基苯通过β分裂、单分子均裂形成苯甲基、烯烃，苯甲基通过氢转移到长链烷基苯的α碳上，烯烃再与α碳结合形成带支链的烷基苯。

Isolation, purification and characteristics of D-hydantoinase were carried out. The experiment results showed that the optimal pH and temperature of pure D-hydantoinase were pH 8. 5 and 35℃, respectively. D-hydantoinase activity could be increased significantly by Mn〓 and Fe〓. Substrate specificity of D-hydantoinase on various hydantoin derivatives showed the optimal substrate of D-hydantoinase was 5-phenylhydantoin, but hydantoin, 5-methylthioehylhydantoin, 5-hydroxyphenylhydantoin, 5-methylhydantoin, 5-benzylhydantoin could also be hydrolyzed by D-hydantoinase.

本文还进行了海因酶的分离纯化及性质研究，发现酶的最适反应温度为35℃，最适pH为8.5，金属离子Mn〓和Fe〓能显著提高D-海因酶活力。D-海因酶的特异性实验表明，D-海因酶的最适底物为D，L-苯海因，其次为海因，D，L-对羟基苯海因和D，L-甲硫乙基海因，对D，L-甲基海因和D，L-苯甲基海因也有一定的作用。

Six derivatives of 4-phenyl-3-phenoloxymethyl-5-mercapto-1,2,4-triazlyole were synthesized from phenoloxyacetyl hydrazide by two-steps reaction under microwave irradiation, then reacted with 2-chloroacetic acid to give six novel derivatives of 2-(3-phenoxymethyl-4-phenyl-[1,2,4]triazole-5-thio)-acetic acid.

在微波辐射条件下，芳氧乙酰肼经两步反应制得4-苯基－3-芳氧甲基－1，2，4-三唑－5-硫酮衍生物，再与氯乙酸反应得到6种尚未见文献报道的2-（3-芳氧甲基－4-苯基－1，2，4-三唑－5-硫基）乙酸衍生物。

Methyl hydrazine and hydrazine hydrate in reaction mixtures from the preparation of methyl hydrazine were determined by Gas Chromatography.

建立了甲基肼合成液中甲基肼、水合肼含量的气相色谱分析方法。

METHODS Polyaldehyde dextran-epirubicin was made by sodium periodate oxidation.Carboxy-methyldextran-epirubicin was made by chloroacetic acid carboxymethylation followed by conjugating in hydrazone bond.

采用高碘酸钠氧化法制备聚醛基葡聚糖-表柔比星偶合物，将葡聚糖羧甲基化后制备腙健连接的羧甲基葡聚糖-表柔比星偶合物。

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。

The most preferable substituents are methyl groups for positions R1 and/or R2, due to the existence of a hyperconjugation effect between the p z orbital of the central carbon atom and one of the C—H bond orbitals in methyl group.

当R1， R2位置是甲基时，由于碳原子的p z 轨道与甲基的一个C—H键轨道间存在强的超共轭效应，从而可以较大程度地降低α-氢转移反应的势垒。

My first article for Screen Power Magazine, which is to this day is the official magazine of Jackie Chan, was a DVD review of the Hong Kong actioner Gen-X Cops, starring Nicholas Tse and Daniel Wu.

我的第一篇文章为屏幕力量杂志，在对这天是Jackie Chan 正式杂志，是香港actioner Gen X 警察的DVD 回顾，担任主角Nicholas Tse 和丹尼尔吴。

His lips grazed hirs, Now what are you going to do?

他的唇使吃草了 hirs，现在你将要做什麼？