杨梅苷

The content of total anthocyanin, total flavonoids and total phenols of arbutus juices were measured by spectrophotometry.

结果如下：对杨梅进行榨汁，并测定其花色苷、总黄酮、总酚含量。

Results of kinetic study of the degradation process of anthocyanins in Myrica rubra juice suggeste that the degradation process is a first order degradation kinetic process. As the increase of temperature and pH value, the half-life degradation of anthocyanins and activation energy for the thermal degradation decrease significantly. Under the same condition, the half-life of concentrate is significantly lower than that of the juice.

花色苷降解动力学数据的分析结果表明：杨梅花色苷热降解属动力学一级反应，随着pH值和温度的升高，杨梅花色苷降解的半衰期(t 1/2)和热降解活化能显著下降，即花色苷的降解速度增大；同一处理条件下，浓缩果汁的 t 1/2明显低于澄清汁。

This paper studied the thermal stability of Myrica rubra juice and concentrate under different temperatures and pH values.

本文研究了杨梅澄清汁及浓缩汁内花色苷在不同pH值和不同加热温度下的热稳定性。

Thermal stability of anthocyanins in Myrica rubra juice is susceptible for degradation by factors like temperature and pH values. The degradation of anthocyanins led to the change of color, and the product quality is therefore influenced.

杨梅花色苷易受温度、pH值等因素的影响而发生降解，是导致产品外观品质变劣的主要原因。

Results β-Stigmasterol (1), quercetin (2), myricetin 3'-methyl ether (3), syringetin-3-0-α-L-arabinofuranosid (4), ardicrenin (5) and ardisiacrispin A (6) were isolated and identified.

结果 分离并鉴定出6个化合物：β-豆甾醇(1)、槲皮素(2)、3'-甲基杨梅黄酮(3)、丁香亭－3-O-α-L-阿拉伯呋喃糖苷(4)、ardicrenin(5)和ardisiacrispin A(6)。

Green tea contains a number of flavonols with the basic structure Specific flavonols found in tea include myricetin (hydroxyls at carbon 3', 4', and 5'), quercetin (hydroxyls at positions 3' and 4'), and kaempferol (hydroxyl at position 4'), and their glycosides.

绿茶含有一些黄酮醇，其基本化学结构为：茶中特有的黄酮醇有杨梅黄酮(3'、4'、5'碳位上羟基化)、豕草花粉苷(3'和4'碳位上羟基化)，莰非醇(4'碳位上羟基化)，以及它们的糖苷物。

Seven chemical constituents were identified on the basis of chemical methods and spectral evidences. ResultsFrom this plant, seven active compounds were isolated. They were determined as farrerol, myricetin ,quercetin, taxifolin, umbelliferone, hyperin and juniper camphor.

结果从满山红中分离得到了7种活性化合物，分别为杜鹃素，杨梅素，槲皮素，二氢槲皮素，伞形花内酯，金丝桃苷，杜松脑。

The results were as follows:Ascorbic acid decreased the stability of color of the anthocyanin solution and yangmei juice.

当杨梅花色苷溶液中加入50mg/L和100mg/L的抗坏血酸时，经70℃，5h热处理后，其花色苷含量分别为对照的70.7%和43.1%，Hunter A值分别为对照的76.2%和48.8%；杨梅果汁中加入50mg/L和100mg/L的抗坏血酸时，经70℃，5h热处理后，其花色苷含量分别为对照的78.8%和53.0%，Hunter A值分别为对照的63.1%和42.4%；在20℃下贮藏6个月后，其花色苷含量分别为对照的61.6%和37.3%，Hunter A值分别为对照的73.8%和49.2%。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐