purpurin
- 网络红紫素;紫红素;羟基茜草素;紫茜素;紫茜草素
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The alkylation and acylation for hydroxyl group linked with nitrogen were accomplished to give N alkoxy and N acyloxy purpurin 18 imides , respectively .
对其羟基进行烷基化和酰基化,合成出N取代红紫素18酰亚胺衍生物。
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The oxidized products were reacted with hydroxylamine hydrochloride to generate purpurin 18 imide by ammonolysis and recondensation .
所得氧化产物进而和盐酸羟胺反应,经胺解开环和再缩合成环构成N羟基红紫素18酰亚胺衍生物;
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The key points for extraction of natural edible purpurin and blue pigment are described .
本文详述了天然食用紫色素和蓝色素的提取技术和操作要点。
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Synthesis and Biological Activities of Copper Purpurin 18
铜紫红素-18的合成及其保肝抗溃疡活性的初步研究
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Extraction Of Natural Edible Purpurin And Blue Pigment
贵重天然食用色素&紫色素和蓝色素的提取技术
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Methods : Purpurin 18 methyl ester is obtained through acidic degradation and alkaline oxidation using chlorophyll a.
方法:叶绿素a通过酸碱降解反应、甲基化反应生成紫红素18甲基酯,然后通过氧化剂对C17-18脱氢,合成具有卟吩结构的原卟啉化合物。
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Spectrophotometric Determination of erythromycin Ethylsuccinate based on the charge transfer reaction between erythromycin Ethylsuccinate and purpurin
琥乙红霉素与紫色素的荷移反应及其测定
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A spectrophotometric method for the determination of roxithromycin has been developed based on the charge transfer reaction between roxithromycin as donor and purpurin as acceptor .
建立了一种测定罗红霉素的方便而快捷的荷移分光光度法。罗红霉素与紫色素在乙醇介质中发生电荷转移反应,荷移络合物在544nm处有最大吸收;
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Strains of Streptomyces belong to eight groups : Grey cinnamonic is the dominant groups and Isolation frequency reached 91.35 % , Followed by the gray purpurin groups and Isolation frequency reached 82.15 % .
链霉菌分离到8个类群:优势类群为灰褐类群,分离频率达到91.35%;其次是灰红紫类群,分离频率为82.15%,金色类群很少,仅在荒草地中分离到。
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Come to the conclusion that the samples ( including the authentic and fake ) used in this study all contain Radix Rubia purpurin and rubimaillin , and the authentic ( not adulterated ) mostly has higher effective ingredients content than the fakes .
得出:本研究所用样品(包括茜草正品和伪品)均含有大叶茜草素和羟基茜草素,正品茜草(不掺杂)有效成分的含量普遍高于伪品。