查询词典 superacid

Olid superacid and solid superbase, which are developed in resent years, attract close attention of many researchers, because of high acidic and basic strength, high catalysis efficiency, no pollution to environment, and no corrosion to equipments, reusable and renewable property.

O_4~(2-)/M_xO_y型固体超强酸和γ-Al_2O_3-NaOH-Na型固体超强碱是其中最具代表性、最有工业应用前景的催化剂，本文对两种催化剂及其在有机合成中的应用进行了研究。

Pentaerythrityl tetraacetate was synthesized from acetic acid and pentaerythrite, catalyzed by SO(superscript 2- subscript 4)/TiO2-La2O3 rare-earth solid superacid. Various factors affecting the reaction were discussed.

以稀土固体超强酸SO(上标 2-下标 4)/TiO2-La2O3为催化剂，乙酸和季戊四醇为原料合成季戊四醇四乙酸酯，并考察了影响反应的因素。

The development of superacid was introduced with the direction of its research and problems in this text.

本文简单介绍了固体超强酸的发展、研究方向、及存在的问题。

Thus, research on solid superacid has drawn more and more attention in industrial catalyst field.

本文论述了固体超强酸催化剂的研究进展及其在酯化反应中的应用。

Solid superacid catalyst is a new type of catalytic materials which have been developed in recent years.

固体超强酸是近年来研究和开发的一种新型固体酸催化剂。

Superacid capacity and convenience of transportation, to ensure that the customer's delivery.

超强的生产能力及便利的运输，确保客户的货期。

Superacid management and marketing strategy support, reduce your business risk.

超强的管理及营销策略支持，降低你创业的风险。

The acid strength and structures of solid superacid catalyst was research.

并对催化剂的酸强度、酸结构进行了系统的研究。

Thus, research on solid superacid has drawn more and more attention in industrial catalyst field.

采用溶胶-凝胶法制备了固体超强酸催化剂，考察它们在酯化反应中的催化活性。

Preparation of Nanosolid Superacid and Synthesis of 2,4,N-Trinitroanilinoacetic Acid Directly

篇名 纳米固体酸的制备及2，4，N-三硝基苯胺基乙酸的合成

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。