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In these chromophores, the ring-locked triene employed as a conjugation bridge and the thiobarbituric acid moiety was as an electron acceptor in a D-π-A units.

在这些发色团中,环锁定的三烯和9,10-二氢蒽用作共轭桥,巴比妥酸和甲氧其分别作为吸电子和给电子基,组成非共轭的两个D-π-A单位。

It is difficult to achieve harmonious color schemes. After studying and comparing the character of different kinds of color spaces, we found that the perceptual uniform Lab color space is helpful for this hard work.

对计算机辅助色彩调和工具进行研究,分析了 Lab均匀色彩空间的特性,提出了可视化匀色空间的两种算法,对比其性能表现并进行了分析。

One kind of rod-shaped virus and two kinds of spheroid viruses had been observed in the hepatopancreatic cells of Venerupis variegate from the shrimp culturing environment in the Xiamen sea area.

在厦门海区对虾养殖内外环境中,电镜观察发现了杂色花蛤肝胰腺的一种杆状病毒和两种球状病毒。杆状病毒大小为(85~90)nm×(240~264)nm,有包膜,存在于细胞核中,细胞质可见。

Though the Oxyrhynchus Historian and Xenophon wrote about the contemporary Greek history, they represent different traditions.

它与色诺芬的《希腊志》虽为同时期古希腊史事的记载,却代表着两种完全不同的史学传统。

Starting from the solubility of disperse dyes, the solubility, up-taking rate, migrating rate of dis_perse Yellow M-4G, Red 3B and Blue 2BLN at different concentration of Leveling Agent GS were tested by poly_mer thin-film bag method, thus demonstrating the hyperchromic effect and achromic effect of leveling agent during dyeing with disperse dyes.

从分散染料溶解度的角度出发,采用聚合物薄膜袋法测定了分散黄M- 4G、分散红3B、分散蓝2BLN 三种分散染料在匀染剂GS 不同浓度时的溶解度以及上染率、移染率,从而展示了匀染剂在分散染料染色中的&增色效应&和&消色效应&,并从染色理论上推论了产生这两种效应的原理。

The alkoxyl group at 2-position is affected by the steric repulsion due to the two methyl groups at 1, 3-position, which causes the oxygen atom of alkoxyl group to deviate from the aromatic ring plane, hence, the conjugation effect of the oxygen atom with aromatic ring decreases

对于IV〓、IV〓,其1,3-位两个甲基对2-位烷氧基产生空间排斥作用,使2-烷氧基氧原子偏离芳环平面,烷氧基对芳环的助色作用受到削弱。

In the present study, influences of 6-BA (6-benzyl aminopurine) on cluster root formation, exudation of citrate and malate and their concentration in the root clusters of P-deficient white lupin plants were studied by using of non-destructive localized collection method and high-performance liquid chromatography analyze technique.

本文研究了6-BA(6-苄基腺嘌呤)处理对缺磷的白羽扇豆排根形成的影响,并利用非破坏性原位收集方法和高效液相色谱技术研究了6-BA处理对根簇分泌柠檬酸和苹果酸及组织中这两种有机酸含量的影响。

To exploit the resources of shikimic acid, the content of shikimic acid in Masson pine leaf, Oriental arborvitae leaf and Star anise, the extraction and recovery experiments were studied by HPLC.

为了开发莽草酸资源,以高效液相色谱法分析了马尾松、侧柏以及八角茴香中的莽草酸含量,并研究了马尾松中莽草酸的超声提取、加热回流两种提取方法和不同加标水平的回收试验。

There are two methods to detect and quantitative analysis Neu5Ac, one is high performance liquid chromatography with the use of Aminex87H column, the other one is barbituric acid method.

对Neu5Ac的检测和定量也有两种方法,一种是利用Aminex87H酸性糖基柱,通过高效液相色谱测定;另一种是硫代巴比妥酸法测定。

This thesis includes five parts as follows.1. The backgrounds and some relative concepts of this work are briefly introduced. The photochemistry of benzamides and compounds with thiourea functional group is also concisely reviewed.2. Total of fourteen benzamides with different substituted groups have been synthesized and structurally characterized. Better photoreaction time for that kind of compounds at given concentrations is confirmed by tracking its'UV spectrum and GC chromatogram. A representative dibenzophenone photoproduct has been determined by X-ray crystallography. The mechanisms of photoreaction of benzamide have been proposed.3. Total of seven N-chloro(phenylmethylenebenzenamines with different substituted groups and sixty-one thiourea derivatives have been synthesized and structurally characterized.

论文的主要内容如下:1、简要介绍本论文工作的研究背景,并对苯甲酰胺和具有硫脲官能团类化合物的光化学研究进展进行简要的总结。2、合成与表征了14个具有不同取代基的苯甲酰胺类化合物,利用紫外光谱和气相色谱确定了此类化合物较佳光照时间,测定了一个具有代表性光解产物的单晶结构,提出了苯甲酰胺类化合物的光反应机理。3、合成与表征了7个带有不同取代基的氯代苯甲酰亚胺中间体及61个硫脲衍生物,测定了两个具有代表性化合物的单晶结构。

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This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。

There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.

双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。