查询词典 acid group

Treatment of sucrose alkyl 4,6-orthoacetate hexaacetates I with water or alcohol in the presence of an acid catalyst afforded derivatives of sucrose acetates by selectively blocking specific hydroxyl group in sucrose and acetyl migration.

4，6-原乙酸蔗糖六乙酸酯在酸催化下水解和醇解，选择性地保护了蔗糖分子中的某些羟基，并通过乙酰基由C~4→C~6迁移的异构化反应合成了一系列蔗糖乙酸酯。

Drink lemon juice: Lemon essentially contains good amounts of citric acid, which is a part of AHAs group that has amazing properties to reduce acne scars.

喝柠檬汁：柠檬其实含有大量的柠檬酸。柠檬酸是果酸的一种，其具有惊人的减轻疤痕作用。

It showed that KOH and phosphoric acid were effective catalyzers,both could increase the yields of pyrolysis liquid and solid products,and as well as raised amount of surface functional group remar...

结果表明，KOH和磷酸是有效的催化剂，均能有效提高裂解液、固体产物得率，使竹炭表面含氧官能团显著增加。

Both diabectic angiopathy and lipid soakage are presented in group DMCH.Conclusion It was confirmed that there was rather high rate of cholecysts stone forming in the rabbits with DM led by Alloxan,that the bile acid,phospholipid reduced and cholesterol increased in the

证实四氧嘧啶致糖尿病大耳白兔胆囊结石形成率甚高，胆囊胆汁酸分泌减少、磷脂减少和胆固醇增加形成成石胆汁，以及形成胆囊微血管病变是胆石形成的重要因素，为深入研究提供了有用的工具。

Because substituted anilines have Lewis acid or Lewis base group, extractions with complexing agent was conducted.

由于取代苯胺都具有Lewis酸性或Lewis碱性官能团，采用相应的络合剂进行了络合萃取的研究。

The epoxide fatty acid ester is the one in which it contains one epoxide group at least.

环氧脂肪酸酯为其内的该脂肪酸包含至少一个环氧基团。

East valuable Jin Danzhong the gamma - linolenic acid and the soybean lecithin will make the fat 质体 both to conform to the original group side principle and to be possible to increase the preparation the stability and the curative effect.

将东宝金丹中γ-亚麻酸和大豆卵磷脂制成脂质体既符合原组方原则又可增加制剂的稳定性和疗效。

More particularly, this invention relates to amino acid chelated mineral compositions containing chromium and, optionally, one or more minerals selected from the group consisting of copper, zinc, manganese, iron and selenium and to methods of administering these compositions to influence mineral uptake and absorption in humans and other warm-blooded animals subjected to conditions of stress or exhibiting symptoms of stress.

更特别地，本发明涉及到含铬的氨基酸螯合矿物质成分，可从一群铜，锌，锰，铁，硒中选择一个或多个矿物质，调节这些成分的方法来影响矿物质摄取和吸收，在人类和其它恒温动物遭受到压力的情形或表现出来压力的症状。

Another group of cocker spaniels have been found to develop heart failure when there are deficient in another amino acid, taurine.

但是由于该药的成本很高，除非检查确认缺乏，一般不予补充。

One manufacturer defines types as lead-acid versus NiCad, while another refers to 1D, 3D, 4D and 8D, or group number batteries as sizes.

一制造商的定义类型式铅酸银两nicad ，而另一个是指一维，三维，四维和为8 D ，或一组号码电池的大小。

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。