黄酮

There are 65 species of Chinese herbs with confirmed anti-HBV activityd, in which 16 probable active constituents are pointed out. They are arene, ketone derivatives, alicyclic carboxylic acid, aromatic carboxylic acid, ester, lactone, cyanide derivatives, heterocycle derivatives, carotenoids, anthraquinones, flavonoids, vegetable tannin, alkaloid, terpenoids, steroids and protein. Among them, the complexes of flavonoids, terpenoids, steroids and alkaloids are more abundant.

确定了具有抗乙肝病毒活性的中草药品种65种，其中含可能活性成分共16种，即芳烃、酮类衍生物、脂环族羧酸、芳香族羧酸、酯、内酯、氰类衍生物、杂环衍生物、类胡萝卜素、蒽醌类、黄酮类、植物鞣质、生物碱、萜类、甾类和蛋白质，而16种中以黄酮类、萜类、甾类和生物碱类成分为多。

Dihydroxy-7, 4′-dimethoxy-dihydrflavonol and -3, 5, 7 -trihydroxy-4′-methoxy- dihydrflavonol were synthesized by selective protection, condensation, epoxidation, cyclization and deprotection from 2, 4, 6-trihydroxyacetophone and anisaldehyde.

以2，4，6-三羟基苯乙酮和茴香醛为起始原料，经选择性保护、缩合、环氧化、关环等步骤首次完成了-3，5-二羟基-7，4′-二甲氧基二氢黄酮醇和-3，5，7-三羟基-4′-甲氧基二氢黄酮醇全合成。

A rapid capillary electrophoresismethod has been developed for the determination of eleven bioactive flavonoids in bee propolis:acacetin,apigenin,cinnamic acid,galangin,ferulic acid,hesperidin,luteolin,naringenin,quercetin,resveratrol,and rutin.

使用毛细管电泳法检测蜂胶中11种黄酮类化合物：金合欢素、芹菜配基、兰肉桂酸、黄良姜精、阿魏酸、橙皮甙、毛地黄黄酮、柑桔黄素、槲皮素、白藜芦醇、芦丁。

There was no report, up to date, on the determination of flavonoids in Psoralea corylifolia L.. In this study, an HPLC method for simultaneous determination of corylin and bavachin was set up.

由于补骨脂中黄酮类化合物的分析测定未见报道，因此，本研究首次建立了同时测定补骨脂中补骨脂异黄酮和补骨脂二氢黄酮的HPLC分析方法。

Of different seasons, and select the best herborization time. Then we compare the contents of general flavone, Diosmin, Palustroside and CHA in 10 samples, draw a conclusion that flavone, Diosmin and Palustroside are the representative index components in Quality standard, steady in different source.

对其质量标准进行了系统的研究，在不同采收期采集了蓬子菜样品，以总黄酮为指标，进行含量测定，确定了最佳采收期；还对不同产地的10个样品中总黄酮、香叶木苷、喇叭茶苷、绿原酸等活性成分进行含量比较，结果蓬子菜中黄酮类成分含量稳定，适于在制定质量标准时作为含量测定的指标成分。

It is not known whether flavonoids can be absorbed in amounts sufficient to exert an antiviral effect in humans, and therefore their possible role in the treatment of childhood exanthems remains unknown.

约黄酮类化合物抗病毒行动已观察到的试管实验。41 42 43 44 45 槲皮素，黄酮类化合物之一的，所表现出特别强烈的试管抗病毒特性； 46 47 48但是，一项研究没有找到槲皮素将有利于小鼠的病毒感染。49这不知是否黄酮类化合物可吸收的数额不足以在人体发挥抗病毒效果，因此，他们在治疗儿童exanthems可能发挥的作用仍然不得而知。

The results indicated that the extraction rate by acetone is the highest,followed that by alcohol and methanol in turn.

结合化学反应，初步认为苦荞麦粉含有黄酮醇类化合物，苦荞麦壳含有黄酮化合物，而甜荞麦壳和甜荞麦粉中可能含有黄烷酮化合物。

Amount of total phenolic compounds, total flavones and DPPH scavenging activity for different kinds of vinegars were compared. The results indicate that (1) DPPH scavenging activity of different kinds of vinegars has a positive correlation with amount of total phenolic compounds, total flavones, the correlation coefficients were 0.9523 and 0.8691, respectively,(2) the higher content of phenolic compounds and flavones in Zhenjiang aromatic vinegar respond for its higher scavenging activity.

对不同品种食醋总酚含量、总黄酮含量、DPPH自由基清除活性的比较分析表明：(1)不同品种食醋自由基清除活性与醋中的总酚含量、总黄酮含量存在正相关性，相关系数分别为0.9523、0.8691；(2)镇江香醋中由于总酚含量、总黄酮含量较高因而自由基清除作用较强。

Ovariectomies were performed in the OVX, OVX-E(OVX+nilestriol), L-ISO (OVX+soy isoflavones 30 mg*kg-1), M-ISO(OVX+soy isoflavones 60 mg*kg-1) and H-ISO(OVX+soy isoflavones 120 mg*kg-1) groups and animals in the SHAM group were subject to sham operation.

将10～12月龄的雌性Wistar大鼠随机分为6组：假手术组、切卵巢模型组、尼尔雌醇组、小剂量异黄酮组、中剂量异黄酮组、大剂量异黄酮组，每组8只。

Several methods were selected to determine the content of flavonoids in corn silk, while satisfying wave length wasdecided by means of UV-visible photometer curves of flavonoids and its monomer in corn silk, as well as rutin at the range of200~600nm after reacting with different regents , and comparison of experimental results were carried out.

本文选用多种黄酮类测定方法，通过对玉米须黄酮类提取液、单体及芦丁标样用不同的显色剂反应后，测定各反应液在200~600nm范围内的吸收曲线，确定了适合玉米须黄酮类定量测定的波长，并对不同测定方法的定量结果进行了比较。

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。