酸的

We have used GC to follow up the formation of epoxy acid and established the acidify condition; we have done series of parallel experiments to better the pivotal condensation reaction between acid and amine; In the cyclization step, we use cheap and available reagent-Lithium amide , rather than expensive LiHMDS, to proceed the reaction; and at last, we introduced green reagent-ozone to clear the phenyl group of nitrogen to avoid using heavy metal reagent-CAN. The total yield for this method is 29.8%.

通过GC监测，确定环氧酸的最佳酸化条件；对关键的酸和胺的缩合步骤，平行试验了多种条件；在环合一步，用价廉易得的氨基锂及催化量的HMDS代替昂贵的LiHMDS进行反应；氮上苯基的脱除采用臭氧，避免了重金属试剂-硝酸铈铵的使用，总收率为29.8％。

Bamboo mosaic virus encodes a 155-kDa replicase that the middle region contains a helicase-like domain according to the existence of several conserved featured motifs of helicase. Previous studies showed that the helicase-like domain exhibits both ATPase and RNA 5'-triphosphotase activities, and Mg2+ is essential for both activities. Mutagenesis of conserved motifs showed these amino acids play important roles for enzymatic activities. These results suggested that the properties of this denatured and renatured protein are coincident with other SF1 helicases.

从胺基酸序列分析显示，竹嵌纹病毒复制酵素中间区域的类解螺旋酵素具有解螺旋酵素的保留性胺基酸区域，经实验显示此蛋白具有ATPase和RNA 5'-triphosphatase活性，而且是依赖镁离子进行反应的，其中保留性胺基酸的突变会破坏其催化能力，说明这在大肠杆菌表达的蛋白质经过变性及重新摺叠的过程，具有和其他SF 1解螺旋酵素相似的特性。

The novel process of preparation of DNS by means of dioxygen liquid-phase oxidation of NTS with synthesized metal phthalocyanine complex catalyst in alkali solution under mild condition were systematically investigated for the first time.

首次以金属酞菁络合物为模拟酶催化剂，在碱性水溶液中，于温和条件下，研究了4-硝基甲苯-2-磺酸催化氧化制取4，4'-二硝基二苯乙烯-2，2'-二磺酸的方法和工艺。

Three solid ternary complexes of rare earths with L tyrosine and glycine with the formula RE 1.5 4(ClO 4) 3 (RE=Pr,Eu,Tb) have been synthsized in alcohol solution and characterized by molar conductance,IR spectra,thermal analysis and fluorescence spectra.

在乙醇溶液中合成了三种稀土与L－酪氨酸、甘氨酸的三元固态配合物RE1.54（ClO4）3（RE＝Pr、Eu、Tb）。并通过摩尔电导、红外光谱、热谱和荧光光谱等进行了表征。

Moreover, higher degree of aromaticity of HA than that of FA was observed in pig manure compost.

而且，无论在堆肥开始还是结束，胡敏酸的芳构化程度都明显高于富里酸。

Achievement of research and development of Hydroxyproline is reviewed with 37 cited references, including four parts, i.e., unbalanced Hyp level and diseases, detecting methods and their application, manufacture techniques and prospects.

摘要从羟脯氨酸平衡失调与疾病、检测方法与应用、生产工艺、展望等4个方面介绍了羟脯氨酸的研究与开发。

The conversion and selectivity of oxidation of 2-octano l to hexanoic acid by nitric acid using the mixed-addenda heteropolyacid H15- xPMoxV12-xO40·nH2O(n=20-40)as the catalys t were studied.

采用磷、钼、钒系列多元杂多酸作为硝酸氧化仲辛醇制己酸的催化剂，对其催化性能和选择性进行了实验研究。

For this, he has built a metabolic pathway in yeast cells that synthesises a chemical called artemisinic acid which chemists can easily convert into artemisinin.

为此，他在酵母细胞内建立代谢途径，从而可以将这种酵母细胞合成为一种叫做青蒿酸的化学成分，而化学家们可以很容易地将这种青蒿酸转化为青蒿素。

The recoveries were 98.5% and 98.4% with the relative standard deviations of 2.5% and 2.3% for Arg and Pro respectively.

精氨酸和脯氨酸的平均回收率分别为98.5%(相对标准偏差为2.5%（n=8)和98.4%(RSD为2.3%（n=8)。

As typical natural organic acid of hydrophilicity and small molecule, gallic acid serves to study the adsorption act and mechanism on a new hyper cross-linked resin modified by amino function groups.

以亲水性小分子有机酸没食子酸作为研究对象，研究了氨基修饰超高交联树脂对没食子酸的吸附行为和机理。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。