查询词典 basic carbonate

Moreover, the effects of alkali metal carbonate promoters and the solvents were investigated at the same time.

考察了碱金属碳酸盐类助剂和溶剂对反应活性的影响。

In the shallow soil with the depth of 0~50 cm below the ground surface,the extent from 0 to 50 centimeters, the change of the δ13C of the soil carbonate is positively related with the depth in the upper soil profile from 0~30 cm,but it will increase rapidly in the lower soil profile as the result of the existence of salined and alkali soil layer.

盐碱化土地在0～50 cm的深度范围内，土壤碳酸盐的δ13C值变化规律为：0～30 cm深度内，土壤碳酸盐的δ13C值随深度的增加而逐渐减小；在30～50 cm范围内，如果有盐积层或碱积层的存在，则土壤碳酸盐的δ13C值迅速增加。

When produce dense sodium carbonate with the material of natural alkali,a plenty of alkaline scrap material or alkaline mud which can alkalify the earth ,pollute the air and environment is manufactured ,using the scrap material by calcine with a large movable kiln is expensive.

在以天然碱为原料生产重质纯碱时，伴生大量碱性废渣，此废渣堆放或坑埋，碱化土壤，污染环境和空气，若用大型回转窑煅烧处理，成本高不经济。

The raw materials used by the method are green chemicals dimethyl carbonate and p-nitrophenol, and the catalyst is NaY molecular sieve, activated aluminum oxide or activated carbon which is impregnated by alkali metals or alkaline-earth metal compounds.

本发明涉及到一种合成对硝基苯甲醚的方法，该方法所用的原料为绿色化学品碳酸二甲酯和对硝基苯酚，催化剂是经碱金属或碱土金属化合物浸渍过的NaY分子筛、活性氧化铝或活性碳。

Most reefkeepers know they need to measure alkalinity, and most know it has something to do with carbonate.

一些水族爱好者需要测量alkalinity，知道它与碳酸盐的关系。

Another problem with the "body alkalinization" concept is that the body pH doesn't change, regardless of how much calcium carbonate is ingested.

另一个问题与"身体碱化"的概念是，身体pH值不会改变，不论有多少碳酸钙是咽下。

The application of dimethyl carbonate in thermoplasticacrylic varnish, pyroxyline varnish, alkyd varnish and PU vamish are introduced.

介绍了碳酸二甲酯在热塑性丙烯酸清漆、硝基清漆、醇酸清漆和聚氨酯清漆中的应用。

A process for preparing alkylene glycols including reacting an alkylene oxide with water in the presence of a combination of additives and an anion exchange resin, wherein the combination of additives comprises carbon dioxide and an organic or inorganic base provided in an amount sufficient to maintain a pH of the reaction mixture between about 5.0 and 9.0, with the proviso that, when the base is bicarbonate or carbonate, then the anion exchange resin is a trimethyl benzyl ammonium anion exchange resin.

制备亚烷基二醇的方法，包括让烯化氧与水在添加剂组合和阴离子交换树脂存在下进行反应，其中添加剂组合包括二氧化碳和以足以保持反应混合物的pH值在约5.0和9.0之间的量提供的有机或无机碱，前提条件是当碱是碳酸氢盐或碳酸盐时，阴离子交换树脂是三甲基苄基铵阴离子交换树脂。

Based on the decompound enthalpy of calcium carbonate, the results showed the relative error less then 2.74%, within the allowable error. By this method, which is simple, highly repeatability and accuracy. So the determination method of solid decompound enthalpy with oxygen bomb combustion is feasible and reliable.

通过测定碳酸钙的分解焓，结果的相对误差为2.74%，在允许的误差范围内，且方法简单，重现性好，准确度高，说明用此方法测定固体物质的分解焓是可行和可靠的。

Based on the work of the first part, we studied the possibility of allyl as a protection group in the synthesis of oligonucleotides consisting in some unstable nucleotide analogues, such as nueleoside carbonate and sulfite.

在寡核苷酸的类似物中，碳酸酯及亚硫酸酯在碱性条件下的不稳定性使其在合成上有一定的困难，这限制了对它们的性质作进一步的研究。

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。