黄酮

Results: Oxidation resistance effect of 0.10% loquat leaf flavanone was close to that of 0.05% tertiary butylhydroquinone, indicating the loquat 1eaf flavanone had obviously oxidation resistance effect to the fat with quantitative relationship. Antiscorbutic acid and the loquat leaf flavanone has the coordination oxidation resistance effect.

结果：0.10%枇杷叶黄酮的抗氧化效果和0.05%叔丁基对苯二酚相近，表明枇杷叶黄酮对油脂的抗氧化效果明显，且作用呈一定的量效关系，抗坏血酸与枇杷叶黄酮有协同抗氧化效应。

Objective By using Alzheimer's model rats induced by AlCl3,the effects and mechanism of Ginkgo flavone were investigated.Methods Ginkgo flavone were given to rats by oral for seven weeks.Then,the ability of study of mice were determined by step-down test and the number of neurons in the Bregma hippocampus containing β-APP proteins were counted.

目的 研究银杏黄酮对三氯化铝所致痴呆模型鼠学习记忆能力和海马内β-APP阳性神经元的影响，以期探讨银杏黄酮抗老年性痴呆的作用机制方法用三氯化铝致老年性痴呆模型大鼠实验对象，以其学习记忆能力、背海马和齿状回内β-APP阳性神经元的量为指标，全面考察银杏黄酮抗老年性痴呆的作用。

objective by using alzheimer's model rats induced by alcl3,the effects and mechanism of ginkgo flavone were investigated.methods ginkgo flavone were given to rats by oral for seven weeks.then,the ability of study of mice were determined by step-down test and the number of neurons in the bregma hippocampus containing β-app proteins were counted.results to the model rats,ginkgo flavone 100,200,400mg?

目的 研究银杏黄酮对三氯化铝所致痴呆模型大鼠学习记忆能力和海马内β-app阳性神经元的影响，以期探讨银杏黄酮抗老年性痴呆的作用机制。方法用三氯化铝致老年性痴呆模型大鼠为实验对象，以其学习记忆能力、背海马和齿状回内β-app阳性神经元的数量为指标，全面考察银杏黄酮抗老年性痴呆的作用。

Content of flavone is the hightest in browning callus. It is supposed, that suppose which the last pace of synthesize flavone is in brovwing callus. SDS-PAGE cataphoresis electrophoresis show protein has big change from differentiating callus to browning callus. The change may has relation with change of enzymire activiation of control flavone synthesize.

黄酮含量的变化以褐化愈伤组织中含量最高，因此我们推测：黄酮合成的最后几步，可能发生在褐化愈伤组织中，从可溶性蛋白质的 SDS-PAGE 平板电泳结果表明，分化愈伤组织与褐化愈伤组织相比蛋白质谱带发生了明显的变化，这可能与控制黄酮合成的有关酶的活性变化有关。

Methods: The sample extraction method of total flavonoids, including water bath water bath reflux extraction and ultrasonic extraction method, the sample determination of total flavonoids, including aluminum nitrate chromogenic method and direct color method, the sample determination of antioxidant flavonoids, including FRAP method and DPPH method.

样品总黄酮提取方法包括恒温水浴回流提取法和恒温水浴超声波提取法，样品总黄酮含量测定方法包括硝酸铝显色法和直接显色法，样品总黄酮抗氧化性测定方法包括FRAP法和DPPH法。

The pigment in colored cotton fibers was extracted by methanol at room temperature. The results of color reactions HCl-Mg reaction, NaBH4 reaction, NaOH reaction, FeCl3 reaction and Pb(Ac2 reaction of the pigment extractive showed that the pigment extracted by methanol was flavone or flavonol with two adjacent hydroxide groups (Table 2, Fig. 1). The results of UV spectral analysis further proved that the pigment extracted by methanol from brown fiber belonged to flavone with two adjacent hydroxide groups in B ring, and that from the green fiber contained not only flavone but also flavonols with two adjacent hydroxide groups both in A ring and B ring and indican replaced a hydroxide group at 3-site of A ring Fig.

通过盐酸－镁粉反应、四氢硼钠还原反应、碱反应、醋酸铅反应、氯化铁反应和紫外光谱吸收的分析表明，甲醇室温提取的棕色棉纤维色素可能是黄酮类化合物，B环上带有邻二酚羟基；甲醇室温提取的绿色棉纤维色素除黄酮类化合物外，还含有3-位羟基被糖甙化的黄酮醇类化合物，A、B环上都带有邻二酚羟基。

TWFiv,20,50 mg·kg~(-1 could inhibit the deducing of TP and ALB and production of WBC,RBC,Pro,ketone body,small round epithelial cells and

以上的实验结果从不同角度证明，苦荞麦黄酮对于不同模型引起的组织缺血都有一定的对抗作用，提示苦荞麦黄酮具有很好的抗缺血作用，从而为苦荞麦黄酮在防治

Flavone and pyrocatechol were chosento act as model compounds of different structure aspects of flavonoids and theirreactions with α-hydroxyl ethyl peroxyl radical were studied. The rate constants of thereactions of α-hydroxyl ethyl peroxyl radical with flavone and pyrocatechol weredetermined to be 〓 and 〓,respectively.

我们又选择了黄酮体和邻苯二酚作为黄酮类化合物的结构模型，用脉冲辐解的方法研究了它们与α-羟乙基过氧自由基的反应动力学，得到黄酮体和邻苯二酚与α-羟乙基过氧自由基的反应速率分别为〓和〓〓。

Four different catechin content cultivars were selected from our tea germplasm appraisal database to assay the gene expression level of the seven genes, flavonol synthase, dihydroflavonol-4-reductase, leucoanthocyanidin reductase, anthocyanidin synthase, etc, which were involved in the flavonoids biosynthesis. The result showed that, the DFR and LAR transcripts were expressed increased with the increasing of tea catechin contents. Nevertheless, the others did not show this tendency clearly.

利用半定量PCR技术检测总儿茶素含量不同的4个茶树品种中与类黄酮合成相关的黄酮醇合成酶、二氢黄酮醇－4-还原酶、无色花色素还原酶、花色素合成酶等7个基因的表达情况，结果表明DFR和LAR基因的表达量与茶树中总儿茶素含量呈一定的相关性，而其他基因则与其相关性不大。

Results In the eleven kinds of Polygonum capitatum, those produced in Panxian, Kunming and Motuo contained the total flavone more, and the cultivated Polygonum capitatum in Shibing contained the total flavone more.

方法紫外分光光度法测定了头花蓼中总黄酮的含量。结果11批头花蓼中，贵州盘县、云南昆明、西藏墨脱等地野生头花蓼中总黄酮的含量较高，贵州施秉栽培头花蓼中总黄酮的含量较高。

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。