酸化的

The spectra of X-ray diffract revealed that its crystal is B type and the value is about 18%, far lower than that of ordinary maize starch. With the method of chemistry modification, we modified the amylose starch with acetates. The result showed that the best reaction condition was at the ratio of 1:5.3 (glucose: acerbity), with MSA 1.5% catalyzer, at 75℃ for 3 h.

利用化学改性法对高直链玉米淀粉进行醋酸酯化改性，最佳反应条件为，淀粉葡萄糖基与酸的质量比1：5.3、催化剂甲磺酸用量为体系的1.5%、反应温度75℃、反应时间3 h，在此条件下可制备取代度为2.84的醋酸酯淀粉，比普通玉米淀粉高0.78。

The n-butyl lactate was synthesied by the esterification of lactic acid and n-butyl alcohol in presence of ammonium ferric sulfate dodecahydrate NH4Fe(SO4)212H2O,and the factor influencing on the yield of reaction were discussed.

摘 要：在十二水合硫酸铁铵催化下，由乳酸和正丁醇发生酯化反应合成了乳酸正丁酯。实验考察了该催化剂催化酯化合成乳酸正丁酯的醇酸比、催化剂用量、反应时间、反应温度诸因素对酯化率的影响。

The influences of mole ratio of ethanediol and naphthenic acid,a mount of catalyst,reation time,reation temperature etc.on est erification were discussed and the suitable processing conditions were found.

介绍了用氧化亚锡非酸性催化剂催化合成环烷酸季戊四醇脂的方法，通过讨论醇酸摩尔比、催化剂用量、反应时间、反应温度等因素对该脂化反应的影响，从而确定了适宜的工艺条件。

The influences of mole ratio of ethanediol and naphthenic acid,a mount of catalyst,reation time,reation temperature etc.on est erification were discussed and the suitable processing conditions were found.

文摘：介绍了用氧化亚锡非酸性催化剂催化合成环烷酸季戊四醇脂的方法，通过讨论醇酸摩尔比、催化剂用量、反应时间、反应温度等因素对该脂化反应的影响，从而确定了适宜的工艺条件。

ABSTRACT This thesis focused on the studies of setereoselectively total synthesis of naturally occurring bisabolane sesquiterpenes and hydroxamic acid derivatives; it contains the following five parts: Part Ⅰ: Hydroformylation reaction have been taken an overview for past 40 years.

本论文主要对防风根烯类倍半萜天然产物和羟肟酸类化合物的全合成进行了研究，内容概要如下：一、对近年来氢甲酰化反应——特别是不对称氢甲酰化反应作了详尽的综述。

On experimental day （ day 0 ）, the rats were intratracheally instilled with bleomycin （ 5mg.kg -1 .body weight ）,and then treated with Angelica Sinensis 100mg.kg -1 and 200mg.kg -1 until they were killed.

按 BLM 5mg.kg -1 体重复制大鼠肺纤维化模型， 24 小时后给药，于 7 、 14 、 28 天观察肺间质纤维化形成的病理变化和肺匀浆中谷胱甘肽、透明质酸的含量变化。

Preparation and Properties of A Chloroperoxidase-like Catalytic Antibody Iodination of free tyrosine and tyrosine in protein is m...

游离酪氨酸和蛋白质中酪氨酸的碘化是由甲状腺匀浆液和亚细胞部分中存在的酶催化的。

In this thesis, we describe a facile and economical synthesis of-abscisic acid from keto-isophorone and 3-butyn-2-ol through ketalization, oxidization, Witting-Horner reaction, reduction with chromium sulfate and other steps in 13% total yields. Compared to the previous routes, the starting materials are more commercially available and cheaper and the synthetic process is more easily controlled in our method, but the yield of this route is still to be improved.As to isostere principle, cyclopropyl and methyl vinyl are a couple of isostere.

本论文设计并完成了一条全新的外消旋脱落酸(1)全合成路线，从廉价的工业原料氧化异佛尔酮和丁炔醇出发，经过缩酮化反应、氧化反应、Wittig-Horner反应、CrSO_4选择性还原反应以及水解等七步反应实现了脱落酸的全合成，总产率达13％，与以往路线相比，该路线所用试剂廉价、合成路线简单，但产率有待提高。

Methods 30 patients with trichloroethylene medicamentous dermatitis and 30 normal persons were selected as the observation group and the control group respectively; color Doppler was used to detect the spleen thickness and longitudinal length, spleen vein and artery diameters, the maximum blood velocity and blood flow of spleen vein and artery; RIA was applied to determine the serum levels of HA, LN, PCⅢ, CⅣ and CG; relevant analysis was made on the linear relationship between serum indices of hepatic fibrosis and spleen hemodynamics of the two groups.

选择30例三氯乙烯药疹样皮炎患者作为观察组，30例同时期健康体检者作为对照组，用彩色多普勒超声仪，检测脾脏厚度及长径、脾动静脉直径、脾动静脉血流量和脾静脉最大流速SPV(下标 x。用放射免疫法检测肝纤维化指标透明质酸、层粘连蛋白、Ⅲ型前胶原、Ⅳ型胶原和甘胆酸的水平，并对观察组与对照组的脾血流动力学参数与肝纤维化指标进行相关分析。

METHODS: The spiral modiolar artery in guinea pig cochlea was exposed by microsurgery, then the fluorogold or horseradish peroxidase was given around the SMA for retrograde tracing.

在正常豚鼠单侧耳蜗螺旋蜗轴动脉局部滴加逆行追踪剂辣根过氧化物酶或荧光金，观察双侧交感颈上神经节、星状神经节内HRP或FG逆标神经元的分布；采用逆标与免疫组化相结合的双重标记方法观察追踪阳性神经元是否表达酪氨酸羟化酶、神经肽Y、钙基因相关肽或P物质。

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。