查询词典 Rhein

The content of five free-anthraquinones (aloemodin, rhein, emodin, chrysophanol, physcion) in Alc95% active part were simultaneously determined by HPLC method.

其中7，3'-二羟基-5'-甲氧基异黄酮是自然界中罕见的B环为间位二取代的异黄酮类化合物，为新化合物。

To further study the chemical constitutes of lipophilic active parts, we prepared Alc95% and Alc50% according to original literature. 20 compounds were isolated by using macroporous resin, silica gel, polyamide, Sephadex LH-20, Rp-18, preparative TLC and preparative HPLC chromato-graphy. The structures of them were elucidated by means of physical and chemical properties, modern spectroscopic analysis techniques—UV、IR、 EI/MS、ESI/MS、〓H-NMR、〓C-NMR、DEPT、HMQC、HMBC. They are nine anthraquinones: chrysophanol (95-1), physcion (95-2), emodin (95-5), aloemodin (95-7), rhein (50-1), sennoside A or B (50-6),ω-hydroxylemodin (95-10), chrysophanol-8-0-β-D-glucoside (95-12), aloemodin-ω-0-β-D-glucoside (95-13); three phenanthaquinones: tanshinone ⅡA (95-3), cryptotanshinone (95-6), tanshinone Ⅰ(95-4); one isoflavone: 7, 3'-dihydroxyl-5' methoxyisoflavone (95-14) and protocaechuic aldehyde (95-9), protocaechuic acid (95-11), astragaloside Ⅳ(50-4), amygdalin (50-5), 2, 3, 5, 4'-tetrahydroxylstilbene-2-0-β-D-glucoside (50-3),-catechin (50-2), cinnamic acid (95-8). Among them, 3'-dihydroxyl-5' methoxyisoflavone (95-14) is a new compound.

经过溶剂萃取、大孔吸附树脂富集、Sephadex LH-20精制、制备TLC及Semi-pre HPLC等手段从中分离了20个化合物，利用理化性质和波谱技术(UV、IR、EI／MS、ESI／MS、〓H-NMR、〓C-NMR、DEPT、HMQC、HMBC)相结合鉴定了它们的结构，分别为9种蒽醌类化合物：大黄酚，大黄素甲醚，大黄素，芦荟大黄素，大黄酸，番泻苷A或B，ω-羟基大黄素(ω-hydroxylemodin)，大黄酚-8-0-β-D-葡萄糖苷(chrysophanol-8-0-β-D-glucoside)，芦荟大黄素-ω-0-β-D-葡萄糖苷(aloemodin-ω-0-β-D-glucoside)；3种菲醌类化合物：丹参酮ⅡA(tanshinoneⅡA)，隐丹参酮，丹参酮Ⅰ(tanshinone Ⅰ)；1种异黄酮：7，3'-二羟基-5'-甲氧基异黄酮（7，3'-dihydroxy-5' methoxyisofla-vone）以及原儿茶醛，原儿茶酸，黄芪甲苷(astragaloside Ⅳ)，苦杏仁苷，2，3，5，4'-四羟基二苯乙烯-2-0-β-D-葡萄糖苷（2，3，5，4'-tetrahydroxylstilbene-2-O-β-D-g1ucoside），Z—儿茶素，桂皮酸。

Objective To observe the protective effect of rhein-arginine on rats ankylenteron and to explore the anti-inflammatory mechanism.

目的 研究大黄酸精氨酸预防大鼠实验性肠粘连的作用并探讨其抗炎机制。

Objective To explore the possible molecular mechanism that rhein antagonizes the effect of TGFβ1 on glomerular mesangial cells. Methods Cultured C57/SJL mouse mesangial cells were used in the in vitro study.

目的 研究大黄酸对系膜细胞葡萄糖转运蛋白1(GLUT1)及葡萄糖摄入的影响，探讨大黄酸拮抗TGFβ1作用的可能机制。

Results: The hairy root was successfully induced and the hairy root culture system was set up; The opines assay was positive for mannopine and agropine; The result of determination showed that there were a lot of anthroquinone constituents in the rhubarb hairy root and the contents of rhein, aloe-emodin, emodin or 8-O-methylchrysophanol were respectively higher than those in wild plant root.

结果：诱导出了天山大黄发根，并建立了发根离体培养系；从发根中检测到甘露碱、农杆碱的存在；定量分析发现，天山大黄发根中含有多种蒽醌类成分，其中大黄酸、芦荟大黄素、大黄素、大黄酚-8-甲醚的含量分别高于原植物根中的含量。

Methods: The medicinal plant Rheum wittrochii Lundstr., was genetically with Ri plasmid harbouring in Agrobacterium rhizogenes 9402 strain to induce hairy roots; transformed the opines from the hairy roots were assayed by paper electrophoresis; the contents of free anthroquinones such as aloe-emodin, rhein, chrysophanol, emodin, physcion, 8-O-methylchrysophanol from the hairy roots were quantitatively determined by HPLC technique.

用发根农杆菌Agrobacterium rhizogenes 9402 所含Ri质粒遗传转化药用植物天山大黄以诱导发根用纸电泳法检测发根中冠瘿碱的存在；用高效液相色谱法测定发根中芦荟大黄素、大黄酸、大黄酚、大黄素、大黄素甲醚、大黄酚-8-甲醚等游离蒽醌化合物的含量。

Emodin, aloe-emodin and rhein are major components of rhubarb.

大黄素、芦荟大黄素及大黄酸是在大黄中最重要的成分，皆为蒽醌类化合物。

Aloe-emodin and rhein were predominant in five anthraquinones after being treated with rare-earth element Eu(superscript 3+).

经Eu(上标 3+)处理的3种类型大黄根中芦荟大黄素和大黄酸高于大黄素、大黄酚和大黄素甲醚。

Economic significance is Rhein、Donau and Volga River.

其中，经济意义最大的是莱茵河、多瑙河和伏尔加河。

BK Giulini GmbH is the oldest chemical companies in ludwigshafen / Rhein, It owns the most advanced theories and technologies of water treatment, with more than six decades of experience in water treatment.

德国贝克吉利尼有限公司是莱因河畔路德维希港最古老的化学公司，掌握最先进的水处理理论和技术，拥有超过六十年的水处理经验。

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