大黄酸

The method is simple and reproducible, which could be used for the analysis of rhein and sennoside A in rhubarb extracts.

本法简单快捷，结果可靠，可作为大黄提取物中大黄酸和番泻苷A的含量测定方法。

" Oxalic acid: Colourless, crystalline, toxic carboxylic acid found in many plants, especially rhubarb, wood sorrel, and spinach."

草酸：无色结晶有毒的羧酸类有机化合物。许多植物中有草酸，尤其是大黄、酢浆草和菠菜。

Sixteen compounds were separated from 80% ethanol extract of Plant A, they were:-lariciresinol,-isolariciresinol,-isolariciresinol 9-O-β-D-glucopyranoside, tanegoside B, apiginin, apigenin 7-O-β-D-glucoside, apigenin 7-O-β-neospheroside, quercetin 3-O-β-D-glucopyranoside, 1, 7-dihydroxy-3, 4-dimethoxyxanthone, 3-O- [α-L-rhamnopyranosyl (1-4 ] -β-D-glucopyranoside-(25S)-5β-spirostan-3β-ol , 3β-O-D-glucopyranoside quinovic acid, mangiferin , 3'-p-hydroxybenzoyl-mangiferin, physcion, benzenyl methanol β-D-glucopyranoside and Vanillic acid.

结果： 1。从植物A的80％乙醇提取物中共分离得到16个化合物，分别为：-落叶松脂醇、-异落叶松脂醇、异落叶松脂醇9-O-β-D-吡喃葡萄糖苷、tanegoside B、芹菜素、芹菜素7-O-β-葡萄糖苷、芹菜素7-O-β-新橙皮糖苷、槲皮素3-O-β-D-吡喃葡萄糖苷、1，7-二羟基-3，4-二甲氧基-口山酮、菝葜皂苷元-3-O-[α-L-吡喃鼠李糖基（1-4）]-β-D-吡喃葡萄糖苷、喹诺酸3β-O-D-葡萄糖苷、知母宁、3′-对羟基苯甲酸-知母宁、大黄素甲醚、苯甲醇-β-D-吡喃葡萄糖苷、香草酸。

and Result:(1 ) Endogastric administration of tan-extracted Rhubarb had no effecton gastric emptying and pancreatic enzyme secretion,buthepatic-bile secretion was increased.

胃饲去鞣质大黄水浸煎剂和腹腔、静脉给予没食子酸，观察对大鼠体重、摄食量、胃排空速度以及胰酶、肝胆汁分泌量的影响。

On the days when dessert is a name given to a handful of chocolates and a little preserved ginger, when macedoine de fruits is the title bestowed on two prunes and a piece of rhubarbs, then the orange, however sour, comes nobly to the rescue; and on those other days of plenty when cherries and strawberries and raspberries and gooseberries riot together upon the table, the orange, sweeter than ever, is still there to hold its own.

当餐后甜点是一成不变的一把巧克力和一点被保藏的生姜的时候，当混合的水果果冻被毫无新意的放在两片干果和一片大黄上面的时候，橘子，虽然有点酸涩，却高昂的出现，让人们眼前一亮；而当樱桃、草莓、黑梅和醋栗混在一起堆在桌上时，橘子，却像原来一样，甚至比原来更香甜的保持着自己特有的芬芳。

On the days when dessert is a name given to a handful of chocolates and a little preserved ginger, when macedoine de fruits is the title bestowed on two prunes and a piece of rhubarb, then the orange, however sour, comes nobly to the rescue; and on those other days of plenty when cherries and strawberries and raspberries and gooseberries riot together upon the table, the orange, sweeter than ever, is still there to hold its own.

首先，橘子是日常生活中的常客，即便客观事实可能并非如此，但至少在水果店里，橘子确实是四季都有供应。）曾几何时，甜点仅仅就是一把巧克力加上一丁点腌制的姜，两个西梅脯加上一块大黄茎居然也美其名曰为水果什锦。那么相比之下，不管有多酸，橘子都可以说是解了燃眉之急，极大地丰富了人们的餐桌。又曾几何时，在那些衣食富足的年月，餐桌上樱桃，草莓，覆盆子和醋栗大聚会，好不热闹，但即便如此，橘子也依然能占有一席之地，而且此时的橘子吃起来无疑是最甜的。

On the days when dessert is a name given to a handful of chocolates and a little preserved ginger, when macedoine de fruits is the title bestowed on two prunes and a piece of rhubarb, then the orange, however sour, comes nobly to the rescue; and on those other days of plenty when cherries and strawberries and raspberries, and gooseberries riot together upon the table, the orange, sweeter than ever, is still there to hold its own.

在只能以几块巧克力或一点冷藏下的姜作甜点的日子，亦或是在只能用几枚干梅子加点大黄做果酱的时候，橘子，虽有几分酸涩，味道却高贵而又新鲜；当樱桃、草莓、覆盆子、醋栗堆积如山，无人问津之时，橘子用异常的甜美，宣告它的无与伦比。

On the days when dessert is a name given to a handful of chocolates and a little preserved ginger, when macedoine de fruits is the title bestowed on two prunes and a piece of rhubarbs, then the orange, however sour, comes nobly to the rescue; and on those other days of plenty when cherries and strawberries and raspberries and gooseberries riot together upon the table, the orange, sweeter than ever, is still there to hold its own.

有时候，人们会用大把的巧克力和蜜饯生姜来充当甜点，还美誉两块李子干和一片大黄为蔬果什锦美味，然而，不管如何酸涩，橘便会挺身拯救各位的味觉；其它时候，当樱桃、草莓、木莓和醋栗等水果充盈而争奇斗艳于餐桌之时，橘，愈发甘甜却纹丝不动，不与它们争艳。

Objective To investigate the effects of all-trans-retinoic acid on proliferation and apoptosis of smooth muscle cell in human saphenous vein organ culture.

目的 研究全反式视黄酸对体外培养的人体大隐静脉内膜增厚、平滑肌细胞增生与凋亡的影响。

MATERIALS AND METHODS: After the male and female ICR mice copulated, the presence of vaginal plug the following morning was considered as gestational day 0 (GD0). At GD9, GD10, GD11 and GD12, the pregnant mice in the treatment group were treated with 80 mg/kg all-trans-retinoic acid, and those of the control group received the same volume of soybean oil. At GD18, pregnant mice were killed and the embryos were harvested. The abnormalities of the embryos in the treatment group were studied.

材料与方法： ICR小鼠合笼后，查到阴栓当天为孕期第0天(GD0)，孕鼠共50只，随机分为GD9、GD10、GD11、GD12给全反式视黄酸(all-trans-retinoic acid，atRA)实验组和对照组，共5组，每组10只，实验组经口灌胃1次给予孕鼠80 mg/kg atRA，对照组则给予等体积的大豆油，于GD18将孕鼠处死并取出胎鼠，观察不同时间给予孕鼠atRA的胎鼠的短肢畸形情况。

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