草酸

Results Eleven compounds were isolated and identified as:quercetin(1),kaempferol(2),quercitrin(3),protocatechuic acid(4),gallic acid(5),protocatechuic acid ethyl ester(6),ethyl gallate(7),vanillic acid(8),1,5,7-trihydroxyl-3methylan...

结果得到11个化合物，分别鉴定为：槲皮素(1)、山柰酚(2)、槲皮苷(3)、原儿茶酸(4)、没食子酸(5)、原儿茶酸乙酯(6)、没食子酸乙酯(7)、香草酸(8)、1，5，7-三羟基-3-甲基蒽醌(9)、琥珀酸(10)、5-羟甲基糠醛(11)。结论化合物6、7、9、11为首次从该属植物中分离得到。

Synthesis of target compounds namely: to vanillic acid as the starting material with methanol under reflux conditions for 4 - hydroxy -3 - p-methyl, then ether, and nitration, reduction, cyclization reaction 6 - methoxy -7 - benzyloxy-quinazoline -4 - one, and then by the chloride in place of aniline, benzyloxy-off, such as etherification reaction of the target compounds; target compounds with the second and third occurrence of substitution reactions of amines by the TM1, that is, 4 - amino-benzene -6 - methoxy -7 - [2 - hydroxy -3 -(N, N-diethyl amino) oxy c] quinazoline; with ether occurred Ornidazole reaction of TM2, namely, 4 - amino-benzene -6 - methoxy -7 - [2 - hydroxy -3 -(2 - methyl -5 - nitroimidazole) C oxy] quinazoline.

本论文以嘌呤类似物喹唑啉为母核，分别在其4位和7位引入结构多样的取代苯氨基和柔性侧链，设计了一系列4-取代苯胺基-6-甲氧基-7-(2-羟基取代丙氧基)喹唑啉类化合物。目标化合物的合成即：以香草酸为起始原料，与甲醇回流条件下得到4-羟基-3-甲氧基苯甲酸甲酯，然后经过醚化、硝化、还原、环合反应得到6-甲氧基-7-苄氧基喹唑啉-4-酮，然后再经氯化、取代苯胺、脱苄氧基、醚化等反应得到目标化合物；目标化合物与二乙胺发生胺取代反应得到了TM1，即4-苯氨基-6-甲氧基-7-[2-羟基-3-丙氧基]喹唑啉；通过与奥硝唑发生醚化反应得到TM2，即4-苯氨基-6-甲氧基-7-[2-羟基-3-(2-甲基-5-硝基咪唑)丙氧基]喹唑啉。

In this paper, the innovative improvement of the cyclization and chlorination of quinoxaline was: 1. DHQX was prepared via reactingο-phenylenediamine with ethyl- oxalate in hydrochloric acid, the mixture was stired at 75-80℃for 2h.

本文对喹喔啉环合和氯代反应作了一些革新性的改进： 1、在环合合成DHQX时：以盐酸溶液为介质，邻苯二胺和草酸二乙酯在75-80℃进行环合反应约2h，即可得产物。

The effect degree order is: first, organic template; second, mineralization ion precursor; third, surface treatment; fourth, lay amount of thin film. In the process of biomimetic synthesis, first of all, the stone surface was pretreated with ethanol and functionalized with organic template solution, and then filmed repetitiously by using filtered CaC_2O_4 supersaturation solution as precursor.

仿生合成的影响因素的影响程度为：有机模板的影响＞成矿离子前驱液的影响＞石材表面预清洁方式的影响＞保护膜层数的影响，较佳的制备条件是：石材表面用乙醇预清洁，较浓浓度的有机模板溶液使之表面功能化，过滤的草酸钙过饱和溶液作前驱液，多层制膜。

Formation mechanism of particles; morphology and size control; nickel and cobalt oxalates; rhombohedron and fibre morphologies

工程科技I，化学，无机化学颗粒形成机理；形貌与粒度控制；镍钴草酸盐；菱柱状与纤维状形貌

Aim To study the influences of Monoammonium Glycyrrh izanateon the immune function in rats model of salpingitis and investigate the mechanism of the action of MAG .

目的：观察甘草酸单铵对输卵管炎大鼠模型免疫功能的影响，探讨其作用机理。

The immune function in rats of salpingitis was increased by MAG.The effect of MAG depended on the dosage in this study.It may be one of the therapeutic mechanisms for sal pingitis.

甘草酸单铵对实验性输卵管炎大鼠免疫功能具有明显促进作用且有剂量依赖关系，这可能是MAG治疗大鼠输卵管炎的主要机理之一。

The unobstruction rate was higher in two MAG groups than that in diluted water group .Conclusion The immune function in rats of salpingitis was increased by MAG .The effect of MAG depended on the dosage in this study .It may be one of the therapeutic mechanisms for sal pingitis .

甘草酸单铵对实验性输卵管炎大鼠免疫功能具有明显促进作用且有剂量依赖关系，这可能是MAG治疗大鼠输卵管炎的主要机理之一。

IrO2--Ta2O5 oxide anode was prepared by coating oxide on titanium substrate which has been pretreated by sandblast and oxalic acid etching.

钛基体涂覆铱钽氧化物阳极制备过程中对基体喷砂并进行不同时间的草酸浸蚀。

The substance used to make the drug, shikimic acid, is found in Chinese star anise and was in short supply.

然而，研究人员后来在中国八角中发现了制造达菲的物质——莽草酸，导致这种材料供不应求。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。