类黄酮

It can beconcluded from the experimental results that in the reaction of flavonoids withα-hydroxy ethyl peroxyl radicals, 2,3-double bond in the C ring plays a moreimportant role than o-dihydroxy in the B ring.

从实验结果来看，在黄酮类化合物与有机过氧自由基反应的过程中，其分子结构中起主要作用的是C环2，3双键，而不是B环的邻二羟基。

For flavonoids containing 2,3-doublebond in their C ring, peroxyl radicals mainly add on the double bond, and the adductsmay transfer to the final products through short chain reactions, which results in theincrease of G values of hydrogen peroxide.

根据实验结果我们认为黄酮类化合物与过氧自由基的反应是加成与电子转移的混合反应。

Part Ⅰ: The changing trend of G values of hydrogen peroxide in the reactionsbetween flavonoids and peroxyl radicals is an important parameter in elucidating thereaction mechanisms,γ-Irradiated aqueous solutions (saturated with 〓) andaerated ethanol solutions of several typical flavonoids were eluted through aluminacolumns and the G values of hydrogen peroxide generated in the solutions weremeasured.

第一部分：黄酮类化合物与过氧自由基反应的过程中生成的过氧化氢值的变化是解释机理的主要依据之一。

The flavonoids content is rich in the leaves of Acer Saccharum and the leaves have pharmic value.

糖槭叶中含有丰富的黄酮类化合物，具有可观的药用开发价值。

ChinaThe optimum conditions of extracting flavonoids in the skin of phaseolus radiatus were investigated by using the orthogonal design.

研究结果表明：在 70℃下用6倍于绿豆皮重体积 3 0 %的乙醇回流提取 2次，每次 2 h，绿豆皮黄酮类化合物提取效果最好。

In order to inhibit its photolysis and enhance its photostability, the flavonoides were selected for photolysis inhibitors of Parsol 1789. It has been found that some flavonoides, for example Rutin, have better effect of i...

研究发现，有些黄酮类化合物对Parsol 1789的光分解有较好的抑制作用，光分解的最大抑制率可达 93.8%。

The pyranyl functional group has compatibility similar to flavonoid natural pigment, and especially facilitates the extraction of natural pigment.

它同时具备亲水性、碱性吡喃功能基团和疏水性苯乙烯骨架，对蛋白等两性生物试剂具有良好的亲合性；吡喃功能基团与黄酮类天然色素具有相似相容性，特别有利于天然色素的提取。

Manganese was rich in tea plant flower and Hibiscus sabdariffa etc.

黄酮类含量最高的是玫瑰花，高达17.01mg／g；其次是贡菊、茶花和金银花，含量高于7.00mg/g；含量最低的是千日红，低于2.00mg／g。

The results are as follows:The root of sanguisorba is abundant in starch (16.1%), tannis (8.85%), oligoprocyanidins (5.7%) and flavone (14.56%). The content in root is higher not only than stalk and leaves, but also than the normal plants.

研究结果表明：野生地榆的根中富含淀粉(16.1%)、鞣质(8.85%)、低聚原花青素(5.7%)以及黄酮类化合物(14.56%)，其含量不仅高于在茎和叶中的含量，也高于一般植物中的含量。

In lixiviating process, the preferable technical parameters of extracting tannis, flavone and oligoprocyanidins from the root and stalk of sanguisorba were obtained through changing the concentration of ethanol, particle size of raw material, the ratio of sample weight to solvent volume, the reflux temperature, extracting time and reflux times.

在常规浸提过程中，通过调节乙醇浓度、原料粒度、料液比、回流温度、回流时间、回流次数因素的影响，确定了地榆根和茎中鞣质、黄酮类、低聚原花青素较佳浸提工艺参数。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。