naphthoquinone

Content Determination of the Total Naphthoquinone in Oil / Water Emulsion of Shikonin by Ultraviolet Spectrophotometry

紫外分光光度法测定O/W型紫草脂肪乳剂中总萘醌的含量

The total bioactivity of naphthoquinone was stronger than volatile oil and showed differences depending on extraction methods .

萘醌色素的整体活性比挥发油强，根据萃取方法的不同又存在一定差异。

Study on Preparation of 2-methyl Naphthoquinone by Phase Transfer Catalytic Oxidation Process

相转移催化氧化法制备2-甲基萘醌的研究

Time resolved ESR Study on the photochemical process in phenothiazine / 1,4 naphthoquinone / ethylene glycol system

吩噻嗪-1,4萘醌-乙二醇体系光化学过程的时间分辨ESR研究

Electrochemical properties of naphthoquinone derivatives

取代萘醌的电化学性能的研究

Compounds 2-8 are 7 blue solids identified as naphthoquinone dimers that were first separated from the plants .

化合物2-8为七个深蓝色或绿色固体，经鉴定为萘醌类二聚体。紫草萘醌二聚体为首次从植物中分离得到。

Under the same condition , 5 - hydroxyl - 8 - methyl - 1,4 - naphthoquinone (ⅱ) was obtained .

在同样的反应条件下，合成了5-羟基-8-甲基-1,4-萘醌（Ⅱ）。

The type and position of substituents affectedOWF π - π greatly for naphthoquinone and anthraquinone derivatives .

取代基类型和取代基位置对OWF（π-π）有较大的影响，如萘醌类发色母体、蒽醌类发色母体等。

Mild sulfonation approach was used to enhance the solubility of shikonin extracted and naphthoquinone colours synthesized , which enable their good using in direct dyeing and mordant dyeing .

通过温和磺化方法提高紫草素和合成萘醌色素的溶解度，以实现直接上染和媒染，没有查阅到这种萘醌磺化方法和染色应用报道。

Vitamin K3 ( menadione ), which contains two ketone groups at the 1,4-position of the naphthoquinone nucleus , might be a potential substrate of NRDR .

维生素K3（menadione）在奈醌环的1,4号位上带有两个酮基团，有着成为NRDR底物的可能。

Based on the study of building conjugated systems through carbon-carbon double bonds , two types of naphthoquinone colours were designed and synthesized . The effective methods to enrich colour chromatography and to improve dyeing properties were developed .

在第四章，主要重点研究通过碳碳双键构建萘醌类共轭体系，设计和合成二种萘醌非偶氮染料，探索丰富染料色谱和改善染色性能的有效途径。

The pilot scale synthesis of 2 methyl 1,4 naphthoquinone ( 2 MNQ ) from 2 methyl naphthalene with Cr 6 + as oxidant by recycle electrolytic oxidation of Cr were studied .

以2甲基萘为原料，Cr6+为氧化剂，采用Cr循环电解氧化法进行了合成2甲基1,4萘醌（2MNQ）的中试研究。

As the adduct between thioglycolic acid and naphthoquinone can be quantitatively removed by extraction with ether , this can be utilized for the determination of protein sulphydryl groups in presence of thioglycolic acid in excess .

利用巯基乙酸-萘醌加合物可以被乙醚抽提去净的性貭，可以在过量巯基乙酸存在时测定蛋白貭中的巯基。

Naphthoquinone pigment is the main constituents of plant Zicao . The structure of 5 , 8-dihydroxy - naphthoquinone makes it instable with light and heat . The effective compounds are easy destroyed by means of solvent extracting .

紫草中的主要有效成分为萘醌色素，其5，8-二羟基萘醌的结构特点使之对光、热极不稳定，若采用普通的溶剂提取法，容易破坏其有效成分。

The reduction mechanism of quinones such as benzoquinone and naphthoquinone was studied on glucose oxidase ( GOD ) modified glassy carbon electrodes , and the kinetics of reaction between the immobilized reduced GOD and the quinones in neutral buffer media was discussed .

研究了苯醌和萘醌在南萄糖氧化酶（GOD）修饰的玻碳电极上的电化学还原机理，讨论醌在中性缓冲溶液中与固定化的还原态GOD的反应动力学。

This paper intends to report three experimentally simple preparations of naphthoquinone , hydroquinone and the corresponding mixed quinhydrone , all redox chemistry being carried out in the solid state . It is of practical significance for the application of theory of redox in Inorganic Chemistry .

报导了通过固体氧化还原作用以制取α-萘醌，氢醌以及对应的醌氢醌试剂，所有反应均在固体状态下进行.对拓宽氧化还原理论在无机元素化学中的应用有实际意义。

It was found that extracted lawsone and sulfonated shikonin , synthetic naphthoquinone and naphthoquinone derivatives could be used in dying wool fabrics , and the deep-dyeing , chromatic properties and color fastness were affected by some factors such as extracting methods , pigment types and parameters of dyeing process .

指甲花醌、磺化紫草素、合成萘醌等同体及衍生物对羊毛纤维均具有一定的染色性能，但深染性、颜色特性以及染色牢度等受到提取方法、色素类型、染色工艺参数等方面的影响。