coumarin coumarin(e)【化學】香豆素，氧雜萘鄰酮。
coumarin(e) 【化學】香豆素，氧雜萘鄰酮。 “asa coumarin a“ 中文翻譯： 阿魏香豆素甲“coumarin anticoagulant“ 中文翻譯： 香豆素類抗凝劑“coumarin anticoagulants“ 中文翻譯： 香豆素抗凝血藥“coumarin cumarin“ 中文翻譯： 香豆素“coumarin glycoside“ 中文翻譯： 白豆素糖; 萊加爾試驗; 香豆素配糖體“coumarin necrosis“ 中文翻譯： 香豆素壞死“coumarin plant“ 中文翻譯： 香豆素植物“coumarin poisoning“ 中文翻譯： 香豆素中毒“coumarin-1“ 中文翻譯： 香豆素－１“coumarin-120“ 中文翻譯： 香豆素－１２０“coumarin-340“ 中文翻譯： 香豆素－３４０“coumarin-35“ 中文翻譯： 香豆素－３５“coumarin-4“ 中文翻譯： 香豆素－４“coumarin-7“ 中文翻譯： 香豆素－７“hydroxy coumarin“ 中文翻譯： 羥基香豆素“methytal coumarin“ 中文翻譯： 羥甲基香豆素“poisoning by coumarin“ 中文翻譯： 香豆素中毒“6,7-dihydroxy-coumarin“ 中文翻譯： 七葉甙元“coumarin dye laser“ 中文翻譯： 香豆素染科激光器; 香豆素染料激光器“coumarin, 1,2-benzopyrone“ 中文翻譯： 香豆素“coumarin-congener purpura“ 中文翻譯： 香豆素類紫癜“coumarilic acid“ 中文翻譯： 苯駢呋喃羧酸“coumaric aldehyde“ 中文翻譯： 香豆醛“coumaric alcohol“ 中文翻譯： 香豆醇“coumaric acids“ 中文翻譯： 香豆酸“coumaric acid“ 中文翻譯： 對羥苯丙烯酸; 香豆酸
coumarine |
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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,然后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表征。 |
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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于一般白芷。 |
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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。 |
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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于i染料以單體的形式存在，但堿催化的膜表面粗糙，結構疏松，而酸催1化的膜表面平整，結構致密。 |
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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，被添加于劣質香煙用作香草香精，在香水中其也被用作香料。 |
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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。 |
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Specialty chemical producer in china specializing in salicylaldehyde , coumarin , and other aromatic aldehydes , as well as phosphorus chloride and oxychloride and organophosphorus compounds 公司成立于1992年。目前公司占地面積二十多畝，建筑面積7000多平方米，固定資產1000多萬元。 |
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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。 |
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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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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 |
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Theoretical calculation and analysis on four cyclic coumarin ' s derivatives of calanolide for anti - aids drugs 四環香豆素的理論計算與分析 |
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Studies on preparation and characteristics of molecular template polymer with coumarin 香豆素分子模板聚合物的合成與性能研究 |
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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 |
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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征 |
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Synthesis of 7 - hydroxy - 4 - methyl coumarin on stannic chloride anhydrous catalyst 乙酰氧基香豆素的合成 |
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Structure - activity relationship of coumarin derivatives for anti - hiv 香豆素類化合物的構效關系研究 |
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Microwave irradiation ; pechmann reaction ; coumarin derivatives 微波輻射pechmann反應香豆素衍生物 |
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Synthesis of coumarin derivatives using microwave irradiation 微波輻射促進香豆素衍生物合成的研究 |
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Study on synthesis of coumarin with cooking phenol 用焦化苯酚合成香豆素的研究 |