有奖纠错
| 划词

Glycolipids (glycosyldiacylglycerols) are diacylglycerols with a sugar attached to the unesterified hydroxyl group.

酯类物质是由甘油二酯和未酯化的羟基形成的。

评价该例句:好评差评指正

In this paper, synthesis of salidroside was reported starting from 4 hydroxyl phenylacetic acid through benzylation, esterification, reduction and glycosidation.

报道了以对羟基苯乙酸为原料,经过苄基化、酯化、还原、甙化等步骤成红景天甙的一种方法.

评价该例句:好评差评指正

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将厚朴酚两羟基用酮保护,再用正己烷重晶分离纯化。

评价该例句:好评差评指正

The hydroxyl value of epoxy-containing polyester was determined by analyzing acetification principle and using acetyl chloride as acetifier and methylene chloride as solvent.

通过对其酰化原理分析,选用乙酰氯作酰化剂、二氯甲烷作酰化溶剂,测定含环氧基聚酯的羟值。

评价该例句:好评差评指正

The ring-opening polymerization mechanism of lactide in the presence of hydroxyl compounds was studied by using ferric ethoxide and ferric n-butoxide as catalysts respectively.

这些在含羟基化物的丙交酯/醇铁聚体系中,羟基化物作为共引发剂参与了丙交酯的开环聚

评价该例句:好评差评指正

Acylation activity of hydroxyl groups in methyl cholicate has been determined by the use of methacryloyl chloride, methacryloyl anhydride and methacrylic acid as the acylating agents.

以甲基丙烯酰氯、甲基丙烯酸酐和甲基丙烯酸作酰化剂,研究了胆酸甲酯分子中羟基的反应活性。

评价该例句:好评差评指正

Nuclear magnetic resonance techniques are used to determine the national aleutric acid preferential conformation. The results show that the dithionic hydroxyl radicals are in reciprocal cross bearing.

采用核磁共振谱法测定了国产紫胶桐酸的优势构象,,其分子中连二羟基处于反交叉位。

评价该例句:好评差评指正

The aurone compounds are generally on one plane ,and they have a bigger conjugate system .The inducement of hydroxyl substituents has little influence on their own geometries .

橙酮类化物分子共面性较强,为较大的共轭体系,取代羟基的接入,对橙酮类化物共面性影响不大。

评价该例句:好评差评指正

用户正在搜索


control grid, control line, control operation, control panel, control rod, control room, control strategies, control surface, control system, control test,

相似单词


3G, 401(K), a,

声明:以上例句、词性分类均由互联网资源自动生成,部分未经过人工审核,其表达内容亦不代表本软件的观点;若发现问题,欢迎向我们指正。

日常生活医学科普

The incorporation of Ascorbic acid with the enzyme, adds hydroxyl group on proline residue in collagen.

抗坏血酸与酶的结合,使胶原中的脯氨酸残上增加了

评价该例句:好评差评指正
Scishow 精选系列

Just two or three carbon atoms, a hydroxyl group, and some hydrogens.

只有两或三碳原以及些氢原

评价该例句:好评差评指正
Scishow 精选系列

And what's left are molecules with four carbons, each of which is saturated, and attached to a hydroxyl group.

剩下的是含四碳的,每都是饱和的,依附在上。

评价该例句:好评差评指正
科学60秒-科学美国人 2020年8月合集

Normally, dehydration would make tardigrade DNA susceptible to damage from chemicals called hydroxyl radicals, which form when water molecules split.

通常情况下,脱水会使缓步DNA容易受到种名为自由的化学物质的伤害,这种物质在水裂时形成。

评价该例句:好评差评指正
Scishow 精选系列

Its molecules come in long chains, called polymers, and on each end there's a hydrogen-oxygen pair, called a hydroxyl group.

他的拥有很长的链叫做高聚合物,每的末端都有氢氧对,叫做组。

评价该例句:好评差评指正
Crash Course 综合篇

Sometimes a hydroxyl group from one molecule is happy to join up with a hydrogen from another, forming water.

有时,中的很乐意与另中的氢结合, 形成水。

评价该例句:好评差评指正
SciShow - Chemistry

And what’s left are molecules with four carbons, each of which is saturated, and attached to a hydroxyl group.

剩下的是有四碳的,每碳都是饱和的,并连接到上。

评价该例句:好评差评指正
中级英语短文

Scientists would need to treat rock and soil with heat to extract water molecules and hydroxyl from them and turn it into liquid water, he said.

他说,科学家需要用热处理岩石和土壤,从中提取水,并将其转化为液态水。

评价该例句:好评差评指正
科学60秒-科学美国人 2023年1月合集

Their experiments show that methanol, commonly known as wood alcohol, and hydroxyl react rapidly at –210 degrees Celsius to form methoxy, which has also been spotted in space.

他们的实验显示,甲醇(俗名木精)和形成甲氧的反应速度在零下 210 摄氏度时很快,而研究人员也在宇宙中发现了这过程。

评价该例句:好评差评指正
Scishow 精选系列

It reacts with HOPDMS in such a way that it breaks off a hydroxyl group from one end of each chain, so that two chains can join together!

它与 HOPDMS 产生反应,通过打断每链接末尾的组,使得两链接可以结合在起!

评价该例句:好评差评指正
Newsweek

Carboxylic acids are a type of organic compound characterized by a carbon (C) atom doubly bonded to an oxygen (O) atom and singly bonded to a hydroxyl group (-OH) .

羧酸是种有机化合物,其特征是碳(C)原氧(O)原双键结合,并与(-OH)单键结合。

评价该例句:好评差评指正
Osmosis-内

Beta hydroxybutyric acid on the other hand, even though it's still one of the ketone bodies, isn't technically a ketoacid since its ketone group has been reduced to a hydroxyl group.

而β-丁酸虽说也是酮体,但却不是酮酸,因为它的酮团被还原成了

评价该例句:好评差评指正
化学 Crash Course

If you were paying attention, you learned that alcohols are organic compounds with hydroxyl groups, if you dehydrogenate them, the hydroxyl converts to a carbonyl and they become dehydrogenated alcohols or aldehydes.

如果你留心的话,你就会知道醇是带有的有机化合物, 如果你将它们脱氢, 就会转化为羰, 它们就会变成脱氢的醇或醛。

评价该例句:好评差评指正
Scishow 精选系列

Technically speaking, an alcohol is any compound that contains a hydrogen-oxygen pair, known as a hydroxyl group, that's bound to an atom of carbon that's saturated, meaning all of its electrons are bound to something else.

严格说来,含有氢氧化合物的东西都是酒精,也就是我们所熟知的氢氧,粘着在饱和的碳原上,也就是意味着所有的电都粘着在另外的东西上。

评价该例句:好评差评指正
Scishow 精选系列

It replaced one of salicylic acid's hydroxyl group — that's an oxygen and hydrogen bonded to a carbon — with an acetyl group, which is two carbons, one double-bonded to an oxygen and the other bonded to three hydrogens.

它用乙酰取代了水杨酸的——氧和氢与碳结合——乙酰是两碳,与氧双键结合,另与三氢结合。

评价该例句:好评差评指正
Crash Course 综合篇

If it's a six carbon chain with a carboxylic acid on it and an alcohol on one of the other carbons, our name has to do two things: identify that the hydroxyl group is there and identify where it is.

如果它是六碳链, 上面有羧酸, 另碳上有醇,我们的名字必须做两件事:确定的存在并确定它的位置。

评价该例句:好评差评指正

用户正在搜索


convene, convened, convener, convenience, convenience food, convenience store, conveniency, convenient, conveniently, convenor,

相似单词


3G, 401(K), a,
  • 微信二维码

    关注我们的微信

  • 手机客户端二维码

    下载手机客户端

赞助商链接