查询词典 substitution method

Product quality and accuracy in high-grade rating for the main objective of import substitution, product performance, accuracy, longevity and reliability of indicators are in the domestic advanced level as the standard for quality control.

产品质量和精度等级以中高档替代进口为主攻目标，产品性能、精度、寿命和可靠性指标均以国内先进水平为标准进行质量控制。

Receive substitution of an acetyl group; of chemical compounds.

得到乙酰基的替代品；化学混合物。

According to previous research work, the sulfoacetic acid disodium salt was synthesized by a nucleophilic substitution reaction in this paper.

本论文在总结前人研究工作的基础上，采用亲核取代反应合成了磺酸乙酸钠。

The methods determing the groups in the modified starch have been developed, that is acidimetry for the basicity of acidified starch, complexing titration for the substitution degree of carboxymethyl starch, and heat paste titration and carbonyl process respectively for the carboxyl and nitrogen of oxidized starch.

建立了以酸碱滴定测定酸化淀粉的碱量、络合滴定法测定羧甲基淀粉的取代度、热糊滴定和羟胺法测定氧化淀粉中羧基及羰基、消化定氮测定阳离子淀粉等几种变性淀粉的基团分析方法。

A contest between substitution and addition was observed in the reaction.

实验中观察到了取代和加成反应的竞争。

052 Describes and claims a body of polycrystalline dielectric ceramic material having a lead zirconate--lead titanate--lead stannate composition falling within the area A B C E F of the triaxial diagram 1d of the drawings accompanying this specification and containing at least one substitutional additive ingredient selected from the group consisting of elements having respective ionic radii sufficiently close to the ionic radius of one of the elements lead, tin, titanium, zirconium and oxygen to permit of substitution, and a valence state differing from that of said one element by less than three units, the aggregate quantity of additive ingredient amounting to from 0.1 to 5 percent of the replaced ion on an atom basis, each additive ingredient present in said material being in ionic form and substituting for a finite percentage of the ions of a particular one of the elements lead, tin, titanium, zirconium and oxygen with respect to which it conforms with regard to ionic radius and valence state, said additive ingredient replacing a quantity of said elements having in the aggregate an equal number of valence units.

参考译文：第 1012052 号专利说明书介绍一种含有锆酸铅，钛酸铅，锡酸铅的多晶陶瓷介质材料，其组成在说明书附图 ld 三元相图中处于 A B C E F 区域内，该组成至少还含有一种置换添加物，这种添加物从一组离子半径分别接近于铅，锡，钛，锆，氧的元素中选出，以利于互相置换，而与上述一种元素化合价之差应小于三价。该添加物的总量为被置换离子的 0.1%~5%克原子。上述材料中的每种添加物是以离子形式存在的，它以一定的百分数置换铅，锡，钛，锆，氧中的某一元素的离子。添加物在离子半径和价数上必须类似于上述任一元素，并且置换添加物的量与被置换的元素在总体上具有相等的化合价数。本句由两个简单句构成，一个主句，另一个是定语从句。

In another hand, the substitution in feeding growth-finishing pigs increase the coarse cellulose content in pigs' diet and the increment of fever, making the hot alarm reaction more serious, especially in summer , hence negative effect is brought out.

但用大豆皮替代麸皮喂生长肥育猪，增加了日粮中粗纤维水平，猪体增热增加，尤其是炎热季节，加重了热应激，以致造成对日增重、饲料转化率的不利影响。

Amines can engage in nucleophile substitution reaction with alky.

胺能参加与卤代烷的亲核取代反应。

That is encouraging for palladium-catalyzed allylic substitution reactions which is difficult to use in industry due to the current low reactivity of catalysts.

而且，值得注意的是这类配体的反应活性都非常高，对于由于催化剂活性低难以在工业上应用的钯催化烯丙基取代反应来说，这无疑是一大喜讯。

Application of 1, 1'-Planar chiral P, N -ligands into palladium-catalyzed allylic substitution

1， 1'-平面手性二茂铁膦氮配体在钯催化烯丙基取代反应中的应用

If you were not , and OS X just booted normally, have no fear.

如果你没有，和OS X刚刚启动通常，没有恐惧。

I only want to preserve our all .

我只想保存好我们的一切