甲基剂

Versicolor suited to grow and produce laccases at pH value 3.5-5.7, and unbuffered media were able to get good laccase productivity though buffered media could get higher laccase activity. Metal ions Cu(superscript 2+) and Mn(superscript 2+) in the culture could remarkably increase the activity of laccases. The optimal concentration of Cu(superscript 2+) was 0.008-0.08mmol/L, and the optimal concentration of Mn(superscript 2+) was about 0.01mmol/L, when the culture contained 0.1mmol/L 2,5-dimethoxyaniline.

结果发现该菌种适宜在pH值3.5~5.7环境下生长并合成漆酶，培养基中添加缓冲液可以获得更高的酶活，但不加则有较高的酶产率；铜和锰可以显著提高漆酶活力，当以0.1mmol/L 2，5-二甲基苯胺为诱导剂时，培养基中宜含0.008~0.08mmol/L Cu(上标 2+)，0.01mmol/L左右的Mn(上标 2+)。

A new process for the preparation of 5-bromo-vanillin with vanillic aldehyde as raw material,AlBr3 as activator,HBr and H2O2 as brominating agent and anhydrous alcohol as solvent was developed in this paper.

摘 要：以甲基香兰素为原料，氢溴酸与过氧化氢为溴化剂，溴化铝为催化剂，无水乙醇为溶剂制备5-溴香兰素。

In the terpolymerization of polyoxyethylene macromer , methyl methacrylate and butyl acrylate the polymerization rate and the effects of various factors on grafting efficiency and molecular weight of the terpolymers were studied.

研究了聚氧乙烯大单体与甲基丙烯酸甲酯及丙烯酸丁酯的三元共聚中大小单体的聚合速率和引发剂用量、大单体分子量及投料比对接枝效率及共聚物分子量的影响。

Amphiphilic graft copolymers were synthesized by the copolymerization of polyoxyethylene macromer with butyl acrylate and methyl methacrylate in benzene using azobisisobutyronitrile as initiator.

以偶氮二异丁腈为引发剂，将大单体聚环氧乙烷与小单体丙烯酸丁酯、甲基丙烯酸甲酯在苯溶液中进行共聚，合成了两亲性接枝共聚物。

Carboxymethyl cellulose was used for pulping agent and water was used for dissolvent in this process. The organic pulp on the surface of the ZnO nanotapers film was decomposed fully, and the ZnO nanotapers were neither curving nor conglobating at high temperature. Moreover, this method had the advantages of low fabrication cost and simple process.

该工艺以羧甲基纤维素为制浆剂，以水为溶剂，所制备的ZnO纳米锥薄膜表面上的有机浆料已基本分解，ZnO纳米锥在高温下既不会弯曲也不会团聚，且成本低，工艺简单。

The composition of copolyester was analyzed and the effect of diluting agent on the properties of polyurethane materials was also studied.

研究了共聚酯的组成及稀释剂（甲基丙烯酸羟乙酯，HEMA）的含量对聚氨酯材料的力学、降解性能的影响。

Chloro 2 hydroxypropyl trimethyl ammonium chloride an etherizing agent ,for modified starch, was synthesised from epichlorohydrin.

以环氧氯丙烷为原料合成了 3-氯- 2 -羟丙基基三甲基氯化铵，后者作为改性淀粉的醚化剂。

The coated non-polymer was a liver-born methylating agent with active surface property.

包被SPIO的非聚合物材料是肝内的甲基化剂，具有活泼的表面活性。

Historically, oxygenates like MTBE were developed in the 1970s as octane enhancers to replace toxic additives like lead, which were phased out of gasoline.

从历史上看，甲基叔丁基醚含氧化合物一样制定了在20世纪70年代的辛烷值促进剂，以取代有毒添加剂，如铅，这是逐步淘汰汽油。

In order to study the mechanism of macromolecule deterring propellant on changing burning law,the polymerizing conditions,mechanical and thermal decomposition performance of coating-layer is studied.

通过改变聚合方式、温度、时间、引发剂、聚合界面的方法，探讨了涂覆层的聚合工艺；通过材料试验机试验和热分解试验，研究了聚二甲基丙烯酸乙二醇酯涂覆层在不同温度下的力学性能及其热分解规律。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。