碱性

The origination, development and situation of the IR characterizaion method of the basicity of solid catalyst s through pyrrole adsorption.

本文通过文献综述，讨论了红外光谱方法以吡咯为探针分子研究固体催化剂表面碱性的起源、发展过程和最新进展。

Thephenomenon did not occur when weak organic acids were added above solutionbecause of the weak base of pyrrolidine ring.

由于〓吡咯烷上的吡咯是弱碱性，与弱的有机酸不能形成盐，故在〓吡咯烷的衍生物中加入有机弱酸，其紫外光谱不发生兰移，这一点与我们的实验结果是一致的。

This kind of material can be made as the compound cement quick-setting additiv e--D-quick-setting additive which can decrease the alkalinity of the quick-set ti ng additive but increase the viscosity of the jet materials.

针对目前国内速凝剂存在的普遍问题，我们经过反复试验、研究，选出一种辅料，制成可降低速凝剂碱性、增加喷射料粘度的复合型水泥速凝剂--D型速凝剂。

The study on the hardening mechanism of the soft soil with the materials shows that the hardening procedure can be divided into three stages:(1). Hydrating and dissolving stage, when material A and material B of the high-water-content and quick-setting materials respectively dissolve and balance in water.(2). Gel and consolidating stage, when the materials hydrate into calcium crystal and the ion exchange and aggregation of soil particles occur in an alkaline environment.(3). the structure developing stage, when the calcium crystals connect each other, absorb and crystallize the water around; the hydrate remnants, calcium hydroxide, carbonate continuously in water and in the air.

本文对高水速凝材料-软土硬化机理的研究表明，高水速凝材料-软土的硬化过程可分为三个阶段：①水化溶解阶段：主要为高水速凝材料的甲、乙料分别与水的溶解、维持平衡阶段；②胶凝固化阶段：主要为高水速凝材料的水化反应生成钙矾石晶体以及土颗粒在碱性环境中发生离子交换和团粒化作用；③强度增长阶段：钙矾石晶体相互连接，大量吸收周围环境中的水分，并将水分变成自己的结晶水；水化残余物氢氧化钙在水中和空气中发生碳酸化作用。

Subsequently, 3-(substituted-phenyl)isoxa- zole-5-methylamino-4(3H)-quinazoline derivatives 6a～6e were obtained by solid-grinding 5a～5e and 4 under the basic Al2O3 at room temperature.

4与5a～5e在碱性氧化铝作用下固相研磨合成了5种未见文献报道的新型的含异噁唑环的喹唑啉衍生物6a～6e。

Hydroquinone could be oxidized into quinone under alkaline condition, and simiquinone free radical was formed as a intermediate of this process.

氢醌在碱性条件下容易被氧化为醌，半醌自由基是这一过程的中间产物。

I would like to ask the banana stem and raisins are acidic alkaline food or food?

我想问问香蕉干和葡萄干分别是碱性食物或酸性食物？

Rayons are also scoured under alkaline conditions, but the process is varied depending on the type of rayon.

人造丝也需要在碱性条件下煮练，但煮练工艺随人造丝种类的不同而有区别。

Copper is also employed in the alkaline Bemberg rayon process.

铜也用在碱性本姆伯人造丝生产中。

In sandstones sonim rock complement and sandstone status, celadon detritus, deposit formed under reaeration, alkali environment, become source of ore, and through last activates, relocation, concentration, and formed deposit, ie.

在砂岩夹灰岩组和砂岩组地层中，还原、碱性环境下沉积形成的灰绿色碎屑岩形成了矿源层，经过后期的活化、迁移、富集，形成了沉积-改造型层控铜矿床。

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。