香豆素
香豆素（Coumarin），学名
-苯并吡喃酮，可以看做是顺式邻羟基肉桂酸的内酯，它是一大类存在于植物界中的香豆素类化合物的母核。
香豆素为无色或白色结晶或晶体粉末，有类似香草精的愉快香味。存在于零陵香豆、薰衣草油等中。难溶于冷水，能溶于沸水，易溶于甲醇、乙醇、乙醚、氯仿、石油醚、油类。有挥发性，能随水蒸气蒸馏并能升华。
荧光是香豆素一个特有的物理性质，在紫外光下，常显蓝色荧光。通过荧光人们很易辨认出它们的存在。在C-7位引入羟基后，可使荧光加强，即使在可见光下，也能观察到荧光。
coumarin
/'kuːmərɪn/ /'kʊmərɪn/
英汉-汉英词典
n. [化]香豆素
词组 | 习惯用语
您要查找的是不是：
- aquamarine n. 绿玉,碧绿色
- marinara n. （意大利烹饪用的含西红柿、大蒜、洋葱等调制成的）海员式沙司 adj. 杂菜的
- columnar adj. 圆柱的；分纵栏印刷或书写的；柱状的
- Cameroon n. 喀麦隆（西非国名）
coumarin n. [有化] 香豆素
coumarins n. [有化] 香豆素（coumarin的复数）；香豆素类
coumarin glycoside 白豆素糖；[生化] 香豆素糖苷
methytal coumarin 羟甲基香豆素
hydroxy coumarin 羟基香豆素
coumarin plant 香豆素植物
coumarin cumarin 香豆素
coumarin dye laser 香豆素染色激光器
网络短语:
new coumarins 新香豆素
coumarin chloride 氯代香豆素
sesquiterpenoid coumarins 倍半萜取代香豆素
coumarin anticoagulant 香豆素类抗凝剂
coumarin anticoagulants 香豆素类抗凝剂; 香豆素抗凝血药;
Simple coumarins 简单香豆素；简单香豆素类
endogenaus coumarins 内源香豆素
英语例句库
- A method for simultaneous separation and determination of two coumarins,dicumarol and cyclocoumarol,in cosmetics by HPLC-diode-array detector(DAD) was developed.
建立了用高效液相色谱(HPLC)/二极管阵列检测器(DAD)测定化妆品中两种香豆素物质——双香豆素和环香豆素的方法。
声明：以上例句、词性分类均由互联网资源自动生成，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。
中文百科
英语百科
Coumarin 香豆素
Coumarin (/ˈkuːmərɪn/; 2H-chromen-2-one) is a fragrant organic chemical compound in the benzopyrone chemical class, which is a colorless crystalline substance in its standard state. It is a natural substance found in many plants.
The name comes from a French term for the tonka bean, coumarou, one of the sources from which coumarin was first isolated as a natural product in 1820. It has a sweet odor, readily recognised as the scent of new-mown hay, and has been used in perfumes since 1882. Sweet woodruff, Meadowsweet, sweet grass and sweet-clover in particular are named for their sweet (i.e., pleasant) smell, which in turn is due to their high coumarin content. When it occurs in high concentrations in forage plants, coumarin is a somewhat bitter-tasting appetite suppressant, and is presumed to be produced by plants as a defense chemical to discourage predation.