They added a small amount of the fluorescent dye coumarin to the emitter material tris ( 8 - hydroxy - quinoline ) aluminum 他们在发光材料三（ 8 ?羟基口喹啉）化铝里，加入了少量的萤光染料香豆素。
The structural identification of natural products by using uv spectrometry was reviewed including flavones , anthrquinone , saponins , and coumarin 摘要综述了紫外光谱法在天然产物黄酮类、蒽醌衍生物、皂甙以及香豆素类化合物结构测定中的应用。
The mythic fungus germ - entity implies various compositions with live sugar , alkaloid , inside the ester , fragrant bean vegetable , water - soluble protein and various cymes 灵芝子实体含有多种糖类活性成分，生物碱，内酯，香豆素，水溶性蛋白质和多种酶类。
The primary synthetic methods of 4 - hydroxycoumarin was reviewed starting from phenol , 2 - acetylsalicylic acid , methyl salicylate , and o - hydroxyacetophenone respectively 摘要概述了4 -羟基香豆素的合成方法，重点介绍了苯酚法，乙酰水杨酸法，水杨酸甲酯法，邻羟基苯乙酮法。
[ main composition brief introduction ] the mythic fungus germ - entity implies various compositions with live sugar , alkaloid , inside the ester , fragrant bean vegetable , water - soluble protein and various cymes 灵芝子实体含有多种糖类活性成分，生物碱，内酯，香豆素，水溶性蛋白质和多种酶类。
Four kinds of 7 - ( n , n - diethylamino ) coumarins with highly active groups were synthesized under microwave irradiation and their structures were characterized by ir , nmr 摘要采用微波辐射技术合成了4种带有较强反应基团的7 -二乙胺基类香豆素，并通过红外光谱、核磁共振等手段对产物的结构进行了表征。
Some coumarin derivatives are synthesized through pechmann reaction with catalytical amount of sulfuric acid . microwave irradiation is used and moderate to excellent results are got . the method is also very fast and convenient 在催化量硫酸的存在下，用微波辐射进行pechmann反应，制备香豆素衍生物，获得中等至良好的产率。本方法快速方便。
Interestingly coumarin , the substance which gives newly mown hay its characteristic odor , is employed to impart a vanilla flavor to certain inferior tobacco products , and can be found as an ingredient in certain perfumes ( 2 ) 有趣的是，双香豆素，这种能够为新的轮车草提供特殊气味的物质，被添加于劣质香烟用作香草香精，在香水中其也被用作香料。
A determination of six metallic elements in cnidium monnieri ( l . ) cuss by flame atomic adsorption spectroscopy ( faas ) is presented and its different part in the procedure of water extract - alcohol precipitation and the extraction of total conmarins were studied 采用火焰原子吸收分光光度法分别对蛇床子全药材、水提醇沉以及总香豆素提取过程不同部位的六种金属元素的含量进行了测定。
From the emission spectra of coumarin 102 ( c102 ) in different conditions , it showed that c102 molecule existed single in both the composite material films . the sample catalyzed by acid had flat surface and dense structure but it had hackly surface and open structure catalyzed by the alkali 香豆素102 （ ci02 ）在不同状1态下的荧光分析表明，无论是碱还是酸催化所得薄膜复合材料， ci02分子在其中基本都以单体的形式存在。
