查询词典 alkaline reaction

The gelatin-siloxane nano-particles are prepared from gelatin and 3-(2,3-epoxy propoxy )propyltrimethoxysilicane by performing chemical combination and hydrolytic reaction in acidic condition to obtain sol; and adjusting the pH value to slightly alkaline for performing polymerization reaction of silicane.

将明胶和3-(2，3-环氧丙氧)丙基三甲氧基硅烷在酸性条件进行化合、水解反应；将该溶胶的pH值调节至弱碱性，使硅烷发生聚合反应，即可得明胶-硅氧烷纳米颗粒。

The experimental results show that the reaction is controlled by a chemical reaction under alkaline conditions.

研究结果表明：在碱性条件下，钾长石的分解反应具有化学反应控制的特征。

Factors that influence the conversion efficiency was discussed, including methanol/oil molar ratio, amount of alkaline catalyst, reaction temperature and reaction time.

试验考察了醇油摩尔比、NaOH用量、反应温度、反应时间等因素对油脂转化率的影响，并对制备的生物柴油样品进行了燃料指标分析。

The influence of water content,molar ratio of methanol to oil,concentration of alkaline catalyst,reaction temperature and time different reaction factors to transesterification ,and methods such as water washing,acid washing,extraction and pressure reduced etc.

考察了原料油水分含量、醇油物质的量比、催化剂浓度、反应温度、反应时间等对转酯化反应的影响，以及水洗、酸洗、萃取、减压蒸馏等不同后处理方法对产品品质的影响。

The reaction conditions including the molar ratio of methanol to oil, amount of alkaline catalyst used, and reaction temperature and time were optimized by the mono-factor and orthogonal tests.

通过棉籽现场碱催化转酯化联产生物柴油和无毒棉粕，考察了棉仁中水的质量分数、粒径对产物中脂肪酸甲酯的质量分数和棉粕中游离棉酚质量分数的影响；对反应过程中的醇油摩尔比、反应时间、催化剂用量、反应温度进行了单因素和正交实验考察。

The effects of ethanol concentration, alkaline concentration, reaction temperature, reaction time, and other factors to the solubility of granular cold-water-soluble starch were analyzed, and the preparation technology conditions were also optimized.

以小麦A淀粉为材料，采用乙醇－碱处理法制备颗粒状冷水可溶淀粉，在系统分析乙醇体积分数、碱浓度、反应温度、反应时间等因素对颗粒状冷水可溶淀粉溶解度影响的基础上，对其制备工艺条件进行了优化。

Effects of temperature, reaction time and additives on the cation exchange capacity of zeolite synthesized by alkaline hydrothermal reaction of fly ash were investigated.

为衡量粉煤灰沸石的应用性能，本研究主要考察了反应温度、反应时间以及添加剂等水热反应条件对合成粉煤灰沸石产品离子交换性能（CEC，Cation Exchange Capacity）的影响。

In addition, tin oxide nano-crystal with different sizes, such as sphere and ribbon shape, can be prepared by adjusting reaction time, temperature, alkaline amount and concentration of reaction matters.

通过调节反应时间、反应温度、碱的量、反应物浓度可以制备不同尺寸的球状、带状氧化锡纳米晶。

Extent of etherbond cleavage becomes more and more intensive with higher alkaline concentration, higher reaction temperature, longer reaction time, stronger activity of nucleophilic reagent, and these substituted aryl ethers will become more and more unstable.

碱浓度越高，反应温度越高，反应时间越长，亲核试剂的活性越强，醚键断裂的程度越大，这类化合物就越不稳定。

Papers in the experimental part of our literature considered on the basis of the experimental exploration, and podophyllotoxin intermediates with the structural characteristics of a simple pepper aldehyde as the starting material,α,β-unsaturated carbonyl compounds are selective reduction lithium aluminum hydrogen reduction reaction as the key steps to have the Knoevenagel condensation, peracetic acid epoxy between chlorine and alkaline hydrogen peroxide epoxy, DCC condensation esterification reaction of the three podophyllotoxin intermediates.

论文实验部分我们在综合考虑文献的基础上，经过实验摸索，并结合鬼臼毒素中间体的结构特点以简单的胡椒醛为起始原料，对α，β-不饱和羰基化合物具有选择性还原的锂铝氢还原反应为关键步骤，先后经过Knoevenagel缩合，间氯过氧苯甲酸环氧化，碱性过氧化氢环氧化，DCC缩合酯化等反应合成了3个鬼臼毒素中间体。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。