酰化产物

Chitosan is an unique alkali polysaccharide from deacetylation of chitin, the abundant polysaccharide in nature.

壳聚糖是自然界中大量存在的甲壳素的脱乙酰化产物，为碱性多糖。

The reaction of condensation-cyclization of the two prepared compounds at 100 ℃ in the presence of anhydrous potassium carbonate gave 1,4,7,10-tetrakis(p-toluenesulfonyl)-1,4,7,10-tetraazacyclododecane,with a yield of 71%.

在无水碳酸钾存在下，100℃加热使所得两种磺酰化产物缩合环化得到1，4，7，10-四-1，4，7，10-四氮杂环十二烷，产率71.0%。

IR analysis indicated that both of the results were accorded with their standards IR spectrum and that the products of alkylation and animation were polyisobutylene succinic anhydride and ashless dispersant TEPA.

通过烃化产物和胺化产物的红外光谱分析，并分别与其标准谱图对照比较，看出产物红外谱图与标准谱图相符，可以确认烃化产物和胺化产物即为聚异丁烯丁二酸酐和聚异丁烯丁二酰亚胺无灰分散剂。

Methyl 6-acylnaphthalene from 2-methylnaphthalene was synthesized via acylation using acetic anhydride and propionyl chloride as the acylating agents with catalyst aluminum trichloride in homogeneous liquid phase system.

为制备重要的化合物2-甲基6-酰基萘，提高酰化产物的收率和纯度，以2-甲基萘为原料，分别研究了乙酸酐和丙酰氯为酰化剂时的酰化反应，对酰化反应的产物进行了GC、FT-IR和GC-MS表征；对酰化反应的影响因素进行了研究。

Following resolution, the following steps are performed: reduce the isomer to an alcohol, react the alcohol with triphenylmethyl chloride, ozonalyze the resulting reaction product, reduce the ozonalyzed product to yield a diol and react the diol with a methane sulfonyl compound to form-3-2-{(methylsulfonyloxy}ethoxy-4--1-butanol methane sulfonate.

拆分后，进行下一步：将异构体还原为醇，使醇与三苯基甲基氯反应，臭氧化所得反应产物，还原臭氧化产物以得到一种二醇并使所述二醇与甲烷磺酰基化合物反应以形成-3-2-{(甲基磺酰基氧}乙氧基-4--1-丁醇甲烷磺酸酯。

The oxylated SEBS and acetylated SEBS were obtained byFriedel-Crafts reactions using the mild catalyst of 〓/〓 complex.

通过SEBS的草酰化及其产物的水解或SEBS的乙酰化及其产物的氧化可以得到单分散的羧化SEBS。

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。

In chapter 2,the bi-electrophilicity ofα-CAPAs(Gly-CAPA,Ala-CAPA) was identified by the isotope analysis ~(18O,~(15)N and furtherproved by trappingα-CAPA with nucleophiles such as water,amino acids,phosphateand methanol in alkaline media which yielded phosphorylated products,namely,theNPAAs and N-(mono-substituted)phosphoryl amino acids.

同时，CAPA和亲核试剂如水，氨基酸，磷酸和甲醇分子反应可以生成各种磷酰化产物，如NPAAs和N-磷上单取代的磷酰化氨基酸。

Seventeen resins were selected to compare their performances in adsorbing and desorbing monosubstituent in the mixture. Experimental results showed that HZ-841 resin possessed higher selectivity and desorption capacity.

比较了17种树脂对β-环糊精单甲苯磺酰化产物的吸附特性，确定了大孔弱极性吸附树脂HZ-841对单取代物具有较高的吸附选择性和良好的脱附性能。

Based on the-references on the thermal imidization of polyand the polymer composition analysis,the thermal imidization mechanism of SMA with aniline was demonstrated to be a two-stage consecutive reaction,in which a second-order reversible ring-opening reaction of SMA to produce poly(styrene-co-N-phenyl-maleamic acid)and a first-order irreversible intrachain ring-closing reaction to form SNPMI were involved.

论文首先参考聚酰胺酸热环化反应，并通过SMA酰亚胺化产物的组成分析，确定了SMA与苯胺的热酰亚胺化反应机理为一个包含由SMA生成苯乙烯—N-苯基马来酰胺酸共聚物的二级可逆开环反应以及由SNPMA生成苯乙烯—N-苯基马来酰亚胺共聚物的一级不可逆分子内闭环反应在内的串联反应过程，其中第二步SNPMA闭环反应为控制步骤。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。