coumarin- 中文意思是什麼

coumarin- 解釋

  • coumarin : coumarin(e)【化學】香豆素,氧雜萘鄰酮。
  1. Synthesis of coumarin - 3 - carboxylic acid ethyl ester

    甲酸乙酯的合成
  2. A new coumarin glucoside from the fruits of citrus aurantium

    酸橙中一個新的香豆素苷
  3. Study on the synthesis of 4 - methyl - 7, 10 - dihydrobenzo h coumarin

    香豆素的合成研究
  4. Study on synthesis of coumarin with cooking phenol

    用焦化苯酚合成香豆素的研究
  5. Synthesis of coumarin derivatives using microwave irradiation

    微波輻射促進香豆素衍生物合成的研究
  6. Microwave irradiation ; pechmann reaction ; coumarin derivatives

    微波輻射pechmann反應香豆素衍生物
  7. Structure - activity relationship of coumarin derivatives for anti - hiv

    香豆素類化合物的構效關系研究
  8. Synthesis of 7 - hydroxy - 4 - methyl coumarin on stannic chloride anhydrous catalyst

    乙酰氧基香豆素的合成
  9. Synthesis of tetraacetyl glucosyl esters and glucoside of coumarin

    香豆素類葡萄糖酯與糖苷化合物的合成與表徵
  10. Determination of 6 - methyl coumarin in cosmetics by high performance liquid chromatography

    甲基香豆素的高效液相色譜測定法
  11. 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 )在不同狀1態下的熒光分析表明,無論是堿還是酸催化所得薄膜復合材料, ci02分子在其中基本都以單體的形式存在。
  12. The histological research of male bai zhi showed that it had severe lignified while the tissues secereting the volatile oil and the coumarin ( secretory cavity ) were very little. the results of extractive test also showed that the principle constituent of male bai zhi was lower than the common evidently

    公白芷的組織研究表明其木化程度高,而與揮發油和香豆素類成分密切相關的組織(分泌腔)又較少,白芷浸出物含量測定的結果也表明,公白芷中有效成分的含量明顯低於一般白芷。
  13. Different reactivity of 7 - hydroxy and 7 - mercapto of 4 - methyl - coumarin and 4 - methylquinolin - 2 - one in the reaction with propargyl halides

    巰基與炔丙基鹵代物的不同反應性
  14. In the fourth chapter, the fluorescence spectra for coumarin 102 ( the donor ) at a concentration of 2 10 - 3niol / l and rhodamine 6g ( the acceptor ) at various concentrations in ethylene glycol and in silica films were measured

    堿催化的樣品其結構更有利於i染料以單體的形式存在,但堿催化的膜表面粗糙,結構疏鬆,而酸催1化的膜表面平整,結構緻密。
  15. Hydroxyquinol triacetate was prepared from p - benzoquinone by 1, 4 - addition reaction with acetic anhydride and then 6, 7 - dihydroxy coumarin was synthesized from it by hydrolyze and cyclization in concentrated sulfuric acid. then 6, 7 - dimethoxy coumarin was synthesized by methylating from 6, 7 - dihydroxy coumarin with an overall yield of 74. 4 %. the procedure was practical. its structure was confirmed by ir and 1hnmr

    對苯醌與乙酸酐經1 , 4 -加成生成1 , 2 , 4 -苯三酚三乙酸酯,然後與蘋果酸反應經水解、環合反應得6 , 7 -二羥基香豆素,再經甲基化得到6 , 7 -二甲氧基香豆素,總收率為74 . 4 % ,整個過程反應條件溫和,操作方便,適合工業生產的要求,對產品結構進行了ir和1hnmr表徵。
  16. The structural identification of natural products by using uv spectrometry was reviewed including flavones, anthrquinone, saponins, and coumarin

    摘要綜述了紫外光譜法在天然產物黃酮類、蒽醌衍生物、皂甙以及香豆素類化合物結構測定中的應用。
  17. 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,雙香豆素,這種能夠為新的輪車草提供特殊氣味的物質,被添加於劣質香煙用作香草香精,在香水中其也被用作香料。
  18. Specialty chemical producer in china specializing in salicylaldehyde, coumarin, and other aromatic aldehydes, as well as phosphorus chloride and oxychloride and organophosphorus compounds

    公司成立於1992年。目前公司佔地面積二十多畝,建築面積7000多平方米,固定資產1000多萬元。
  19. 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,用微波輻射進行pechmann反應,制備香豆素衍生物,獲得中等至良好的產率。本方法快速方便。
  20. They added a small amount of the fluorescent dye coumarin to the emitter material tris ( 8 - hydroxy - quinoline ) aluminum

    他們在發光材料三( 8 ?羥基口喹啉)化鋁里,加入了少量的螢光染料香豆素。
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