甲基

Several methods applied widely for synthesizing uronic acid are introduced, such as methods of one-step process and two-step process.

分别就糖醛酸的几种常用合成方法进行了介绍，即直接将羟甲基氧化成羧基的一步法和先将羟甲基氧化成甲酰基、再氧化成羧基的两步法。

Promoter methylation of hTERT is a regular event in uveal melanoma.

葡萄膜黑色素瘤中 CpG 岛甲基化的启动子：通过启动子超甲基化使肿瘤相关基因失活是各种肿瘤发展过程中的一种普遍核外遗传现象。

R-4-Methyl-δ-valerolactone was transformed into-methyl 5-bromo-4-methylpentanoate (5) which is a stable and easily reserved reagent.

首次利用甾体皂甙元氧化降解废弃物-4-甲基－δ-戊内酯合成了松叶蜂性信息素(25，3S，7S)-3，7-二甲基－2-十五醇乙酸酯(2)和丙酸酯(3)。

MATERIALS: Ethylene glycol methacrylate compound with methyl methacrylate was mixed with NaCl solution to obtain porous hydrogel orbital implant; polyurethane membrane was established using electrospinning method. A volume fraction of 75% ethanol was used to make homologous sclera wrappage.

材料：用甲基丙烯酸-β-羟乙酯和甲基丙烯酸甲酯的聚合物单体加入NaCl成孔剂制备多孔水凝胶义眼台；静电纺丝法制备聚氨酯包裹膜；体积分数为75%乙醇浸泡制备同种异体巩膜包裹物。

It was found that zymosterol in S. cerevisiae GL7 cells and cycloartenol in P. wickerhamii cells were accumulated when treated with solasodine. Zymosterol and cycloartenol are respective substrates of sterol 24Cmethyltransferase in S. cerevisiae GL7 and P. wickerhamii, hence we deduced that sterol C-24-methyltransferase is the main target of solasodine.

根据澳洲茄胺对S.cerevisiae GL7和P.wickerhamii的甾醇生物合成途径的抑制结果均积累24位甾醇甲基化转移酶的底物，分别是zymosterol和cycloartenol，初步阐明了澳洲茄胺的主要作用靶点是24位甾醇甲基化转移酶，而其它几种抗真菌生药活性成分不影响甾醇的生物合成途径。

A series of polymers containing 1,8-naphthalimide moieties in the side chains have been prepared via RAFT technique. Firstly, five styrene and two methyl acrylate based 1,8-naphthalimide monomers were synthesized and characterized. Then, carbazyl group terminated polystyrene was used as macromolecular RAFT agent.

我们合成了5种苯乙烯类和2种甲基丙烯酸酯类萘酰亚胺单体，以一种含末端带咔唑结构的聚苯乙烯为大分子RAFT试剂，考察了所得单体的RAFT聚合，发现苯乙烯类1，8-萘酰亚胺单体可以聚合，但是聚合度不高，甲基丙烯酸酯类1，8-萘酰亚胺单体RAFT聚合不可控。

It was found that for benzoyl peroxide initiation at room temperature, HMA is efficient than the more commonly used DMA, as indicated by decreased cure times or increased peak exotherm and barcol hardness.

比较了N，N-二甲基苯胺和N-甲基-N-2-羟乙基苯胺对不饱和聚酯树脂的固化，HMA的固化时间比DMA的短，放热峰温度和巴士硬度比DMA的高。

This thesis studies the analytical methods of determination of Leucogen and Hydroxymethylnicotinamide by Ultraviolet and Atomic Absorption Spectrscopy.

本文研究了分光光度法和原子吸收光谱法测定利血生及羟甲基烟酰胺的分析方法，提出了利血生的三种测定方法和羟甲基烟酰胺的一阶导数峰-零法的测定新方法，并用于实际样品的测定，获得满意结果。

The PMMA macromer was obtained by radical polymerization in the presence of 2-mercaptoethanol as a chain transfer agent, followed by termination with acryloyl chloride.

甲基丙烯酸甲酯进行自由基溶液聚合，巯基乙醇为链转移剂，然后用丙烯酰氯封端制备了聚甲基丙烯酸甲酯大分子单体。

The macromer, methoxy polyethylene glycol methacrylate, used for polycarboxylate based superplasticizer was prepared by esterification of methacrylic acid and methoxy polyethylene glycol.

以聚乙二醇单甲醚和甲基丙烯酸为主要原料，通过酯化反应制备聚羧酸系减水剂大单体聚乙二醇单甲醚甲基丙烯酸酯。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。