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词汇 lactones
分类 英语词汇 英语翻译词典
释义

lactones /'læktəun/

英汉-汉英词典
n. 内酯（lactone的复数形式）
词组 | 习惯用语
您要查找的是不是：
  • lactose n. 乳糖
  • lactone n. [化]内酯
lactones n. [有化] 内酯（lactone的复数形式）
terpene lactones 萜类内酯
lactone n. [有化] 内酯
macrocyclic lactone 大环内酯
lactone bond 内酯键
lactone isomerism 内酯异构现象
terpene lactone 萜类内酯
angelica lactone 当归内酯

网络短语:
Corey lactones Corey内酯
lactones products 丁位内酯系列
chiral lactones 氨基噻二唑
diterpene lactones 二萜内酯类
Terpene lactones 萜类内酯; 萜内酯; 萜烯内酯; 总内酯;
styryl lactones 苯乙烯内酯
acyl-homoserine lactones 酸内酯；高丝氨酸内酯；酰基高丝氨酸内酯
Tripterygium total lactones 雷公藤总内酯
total diterpene lactones 总二萜内酯
ginkgo terpene lactones 银杏萜内酯；银杏总内酯
英语例句库
  1. Three-dimensional structure of the quorum-quenching N-acyl homoserine lactone hydrolase from Bacillus thuringiensis.
    Liu D, Lepore BW, Petsko GA, Thomas PW, Stone EM, Fast W, Ringe D.
  2. It is used to shape the packaged liquid lactone tofu by means of heating and sterilize it by means of pasteurism.
    用于将封装完毕的液体内酯豆腐加热成型及巴氏灭菌。
  3. The medicine compound includes two or more components of nutro-pyridazol, penicillins, macrocyclic lactones, bismuth salts, ranitidine and its hydrochlorides and omeprazole in certain proportion.
    本发明公开了治疗十二指肠溃疡的复方胃药，该复方胃药包括硝达唑类、青霉素类、大环内酯类、金属铋盐类、雷尼替丁或雷尼替丁盐酸盐、奥美拉唑中的两种或两种以上组分。
  4. Artemisinin is an endoperoxide of the sesquiterpene lactone.The structure of this compound is too complex to be synthesized effectively.Artemisia is also found in many parts of the U.
    青蒿素是倍半萜烯的一种内过氧化物，这种物质由于其极复杂的结构，因此很难被有效合成。
  5. The content of flavanone and lactone in leaf and the leaf output were studied by randomizing block arrangement of 31 gingko female varieties (strain) and 4 staminiferous plant type single clone.
    摘要采用31个银杏雌性品种和4个雄株类型的单株无性系，随机区组排列，对叶产量性状及其与叶产量的相关性，叶黄酮、内酯含量进行了研究。

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原声例句
科学60秒 2018年2月合集

They naturally break down lactones. They just can't do this specific lactone. They can't break down aflatoxin.

“它们能轻易地分解内酯环。它们只是不能分解这种特定的内酯环。它们不能分解黄曲霉毒素。”

Scishow 精选系列

Whereas synthetic chemists can whip up massoia lactone in the lab, no tree stripping necessary.

不过实验室合成的可以替代它，不用去剥树皮。

科学60秒 2018年2月合集

So Siegel hopes that an enzyme that has the ability to attack lactones can be modified so that it works on aflatoxins.

因此，西格尔希望能改造一种可破坏内脂环的酶，使其可作用于黄曲霉毒素。

科学60秒 2018年2月合集

So it's been shown in studies a long time ago that breaking this lactone ring decreases toxicity by several orders of magnitude.

“很久之前的研究显示，打破这种内酯环可使毒素降低好几个数量级。

中文百科

内酯 Lactone

（重定向自Lactones）

内酯（英文：Lactone）即环状的酯，由一化合物中的羟基和羧基发生分子内缩合环化得到。内酯以五元（γ-内酯）及六元（δ-内酯）环内酯最为稳定，环内的角张力最小。4-羟基酸（R-CH(OH)-(CH2)2-COOH）在室温及稀酸存在下，便自发酯化形成五元环内酯。其他元数的内酯，如β-、ε-内酯，也可以制得，但不及以上二者稳定。

大环内酯是内酯的一类，分子内环元数较大，有很多是药物的成分。

英语百科

Lactone 内酯

（重定向自Lactones）
Oxandrolone Synthesis

Lactones are cyclic esters of hydroxycarboxylic acids, containing a 1-oxacycloalkan-2-one structure, or analogues having unsaturation or heteroatoms replacing one or more carbon atoms of the ring.

Lactones are formed by intramolecular esterification of the corresponding hydroxycarboxylic acids, which takes place spontaneously when the ring that is formed is five- or six-membered. Lactones with three- or four-membered rings (α-lactones and β-lactones) are very reactive, making their isolation difficult. Special methods are normally required for the laboratory synthesis of small-ring lactones as well as those that contain rings larger than six-membered.
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