黄酮

In order to make use of the resources of longan leaves ,avoid wasting and approach the extraction of total flavanone of longan leaves .

目的：为充分利用龙眼叶植物资源，避免资源的浪费，探讨龙眼叶总黄酮的提取及鉴别方法。

Objective:To establish a method for determination of total flavonoids and luteolin in Pyrethrum tatsienense.

目的：建立藏药打箭菊中总黄酮及木犀草素的含量测定方法。

Compare with other flavonoid the inhibition effect of Luteolin is better than Quercetin and Genistein.

并且与其他类黄酮化合物比较Luteolin的抑制效果更胜於大众所熟知的抗氧化、抗癌物质物质Quercetin、Genistein。

The Benefit: These dainty leaves are highly concentrated with luteolin, a powerful flavonoid with anti-inflammatory properties.

好处：这些精致的叶子富含木犀草素（强大的类黄酮具有抗发炎的特性）。

The chemical constituents of Huperzia serrata Trev. are mainly flavonoids, triterpenoids and alkaloids. In order to get further comprehension of lycopodium alkaloids, we studied the low-polar section of the alkaloids extraction of Huperzia serrata and 19 alkaloids were isolated by ways of silica gel, RP-18 and Sephadex LH-20 etc. All of their structures, including five new compounds and two known ones that were firstly found from this genus, were elucidated with the help of Mass, IR, NMR spectra and so on. The five new alkaloids (HS-07, HS-08, HS-09, HS-10 and HS-11) are belonged to lycopodine class. The other two ones that were new to this genus (HS-18 and HS-19) are belonged to miscellaneous group.

蛇足石杉的主要化学成分为黄酮，三萜和生物碱，为进一步了解该植物的生物碱成分，我们研究了蛇足石杉氯仿总碱低极性部位的生物碱成分，运用正相硅胶、反相RP-18、凝胶LH-20等方法分得了19个生物碱，并通过质谱、红外、核磁共振等波谱鉴定了它们的结构，其中5个为新化合物，2个为首次从该属植物中分离得到的化合物，所分得的新化合物：HS-07、HS-08、HS-09、HS-10和HS-11均为lycopodine类石松生物碱，首次从该属植物中分得的化合物为miscellaneous类：HS-18和HS-19。

The research aimed to compare the scavenging abilities of total flavone from Lygodium japonicum with different solvents to free radical activity.

［目的］比较不同溶剂提取海金沙总黄酮对自由基活性清除能力的大小。

Objective To establish a method for determining the content of total flavoes in fruit of Malus micromalus.

目的建立海红果中总黄酮含量的测定方法。

Objective: To study on Inhibitory Effect of Flavonoid Extracts from Hibiscus manihot L on Tyrosinase Activity.

目的：研究金花葵总黄酮对酪氨酸酶活性的抑制作用。

According to our method, we can quantify the total amount of isoflavone more rapid and conventiently without preparing all 12 kinds of standards.In this study, acetyl- and malonyl- glycosides were converted to 7-O-glycosides by reacting with 1M methanolic sodium methylate at 60℃ for 20 min. Then, the solution was neutralized with 2.5N HCL and extracted for further 30 min at 60℃. Aglycones and 7-O-glycosides were then analysed by HPLC.

根据本研究，此方法系使用1.0 M sodium methylate在60℃下与样品中之acetylglycoside、malonylglycoside反应20分钟，将其转化为7-O-glycoside，反应完成后以2.5N盐酸水溶液中和，调整溶液为80%甲醇溶液并在60℃下继续萃取30分钟然后进行HPLC分析；由於仅需要分析两种形式的大豆异黄酮化合物（aglycones及7-O-glycosides），因此可以有效地缩短分析时间至30分钟以内。

This thesis deals with the investigation on the chemical constituents of Dioscorea Opposite Thunb and studys the interactions between 5,7-dihydroxy-4′-methoxy flavanone,-epicatechin and bovine serum albumin using fluorescence, electrochemical method ,UV absorption and NMR spectroscopy. The main contents are as follows: Chapter 1: Study of the chemical constituents in Dioscorea opposita Thunb 1. Two methods were used to methylate the fatty acid in Dioscorea opposita Thunb.

本文在前人的工作基础上对我省道地药材-怀山药饮片中的化学成分进行了系统的研究；同时利用核磁共振方法、电化学分析法、荧光光谱法、紫外光谱法分别研究了两种天然酚性化合物5，7-二羟基-4′-甲氧基二氢黄酮，(--表儿茶素与牛血清白蛋白之间的相互作用，主要内容如下：一。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。