查询词典 acetylating

The pure isomers 3-(1-hydroxyethyl)-8-vinyldeuteroporphyrin Ⅸ and 3-vinyl-8-(1-hydroxyethyl)deuteroporphyrin Ⅸ were obtained from protoporphyrin Ⅸ dimethyl ester.Starting from these two acetylating compounds,eight new porphyrin derivatives were synthesized through an alkyloxy fission reaction.

以原卟啉Ⅸ二甲酯为起始原料，合成并分离得到3-(1-羟乙基)-8-乙烯基次卟啉Ⅸ（Ⅱ1）和3-乙烯基-8-(1-羟乙基)次卟啉Ⅸ（Ⅱ2）二个异构体，两者分别经酰化后与醇进行烷氧裂解反应合成了8个全新的卟啉衍生物。

The optimum reaction condition of NaClO oxidative pretreating and viny acetate acetylating technique has been determined according to sizing property, that further improves the function of acetylated starch size and expands its application in warp sizing .

对醋酸淀粉酯的变性工艺进行了系统的研究和探讨，以浆纱性能为依据，确定了次氯酸钠氧化预处理工艺和醋酸乙烯酯乙酰化工艺的最佳反应条件，进一步提高了醋酸淀粉酯浆料的性能，扩大了醋酸淀粉酯在纺织经纱上浆中的应用

The results for origin differentiation of 10 heroin samples and their acetylating agents were satisfactory.

经对10个不同来源的海洛因样品进行检测，得到了满意的结果。

Including the common component CBP/p300, one of whose functions is to modify the structure of chromatin by acetylating

它的名字最初来自于果蝇上的同源位点（这个基因决定果蝇身体结构的特征）。

The optimal derivatization condition is reducting reaction 2.5h at 50℃followed by acetylating 2.5h at 90℃.

总结出了单糖衍生化最佳的反应条件为还原温度50℃、还原时间2.5h；乙酰化温度90℃、乙酰化时间2.5h。

Results: By acetylating the extract before analysis, differentiation of the early-eluting components was observed, some of the derivatives were retained extremely strongly.

结果：在三七提取液乙酰化后，可以观察到在原样品色谱图中较早洗脱出的组分的变化，其中某些组分衍生物的保留时间大大延长。

METHOD:Synthesis of paracetomol by hydrogenating and acetylating the p-nitrogenation at different conditions.

以对硝基酚和醋酐为原料，Pd-C或Pt-C作催化剂，加氢制备扑热息痛，优选反应条件。

In order to investigate whether the lysine 188 residue in the XRCC4 is chemically modified by the enzyme SIRT2 or not, I apply site-directed mutagenesis to alter this lysine to either arginine or glutamine, which mimicking the non-acetylating or fully acetylating of lysine residue.

为探讨具酵素功能之SIRT2是否对於XRCC4 188位置之离胺酸进行化学修饰作用，利用定位突变方式分别将该离胺酸置换成麸醯胺或精胺酸，试图模仿XRCC4离胺酸188乙醯化与去乙醯化，是否造成其对SIRT2之亲和力之改变。

Thederivatives of 5 kinds of monosaccharides Xyl, Ara, Man, Glc, Gal were detected anddetermined respectively by GC-MS. The influences of several factors, such asreductive time, reductive temperature, acetylating temperature and acetylating time,on recovery of monosaccharides were studied by orthogonal experiments. The resultsshowed that the reductive temp.

利用气相色谱—质谱联用技术检测五种常见单糖(木糖、阿拉伯糖、甘露糖、葡萄糖、半乳糖)的乙酰化产物含量，采用正交试验综合考察了还原时间、还原温度、乙酰化温度、乙酰化时间等因素对单糖回收率的影响及规律。

Respectively, glutamic acid derivatized β-CD has been synthesized with epoxy chloropropane as the intermediate, a water-insoluble yellow liquid was got after the acetylating of the by using acetic anhydride, which was used as a novel gas chromatographic CSP; A water-soluble β-CD polymer cross-linked with epoxy chloropropane has been synthesized, and the derivatives of β-CD polymer were synthesized by its alkylating and acetylating. The different β-CD derivatives were coated on silica capillary columns by dynamic method, the chromatographic properties and retention behaviors of the fused silica capillary columns were studied, the results showed that the β-CD derivatives had good stereoselectivity and separation results to some compounds, especially to various positional isomers and enantiomers.

本文还分别以环氧氯丙烷为中间体，合成了七{2，6-二-O-[3-(1，3-二羟基丙氨酸)]}-β-环糊精，再用醋酸酐将其乙酰化，得到了一种淡黄色粘稠液体，合成了一种新型的环糊精衍生物；以环氧氯丙烷作交联剂合成了一种水溶性的β-环糊精聚合物，再将其烷基化和酰基化，合成了β-环糊精聚合物的不同衍生物，用动态法将不同类型的β-环糊精衍生物涂渍在石英毛细管柱上，通过对所制备柱柱性能的测试和对一系列化合物的分离和保留行为的研究，结果表明所合成的β-环糊精衍生物对各类化合物，特别是对位置异构体和对映异构体具有较好的分离效果，显示了很强的立体选择性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。