草酸

Extraction,purification and determination methods of glycyrrhizic acid in Licorice are surveyed in this paper.

中文摘要：综述了甘草中有效成分甘草酸的提取、纯化和测定方法的研究概况。

We have been in the line of chemical raw materials for many years, dedicated to exporting quality zinc oxide, titanium dioxide, oxalic acid, stpp, Basic Chrome Sulphate, and LITHOPONE worldwide.

我们一直在线的化工原料多年来，致力于优质出口氧化锌，二氧化钛，草酸，三聚磷酸钠，基本铬硫酸，立德粉和世界各地。

The characteristic of pectinases production by solid state fermentation with Penicillium oxalicum BZH-2002 and lixiviation condition were investigated.

对草酸青霉菌BZH-2002菌株固体发酵果胶酶的特性及浸提条件进行了研究，确定其最佳产酶时期为72-92h，利用干物质量最快的时期为24-72h，发酵产酶期间培养基介质中pH值呈"V"字形变化。

P deficiency, Al and -P+Al all decreased leaf malate content in both varieties and BX10 was decreased more.

短期-P+Al处理对BX10和BL2叶中草酸含量影响不大，处理14d的BX10则有较大的增加，是对照的1.8倍。

Primary by-products range from benzoquinone to maleic acid and oxalic acid.

中间产物主要为苯醌、马来酸、草酸等，

The results indicated that organic acids, except malic acid, had significant influence on available P.

结果表明，有机酸引起速效磷含量增多，除苹果酸处理的变化较小外，草酸和柠檬酸的加入使土壤中速效磷显著增加。

With the increase of soil pH, Cd desorption decreased rapidly in the presence of oxalic acid and malic acid.

随着pH值升高，草酸、苹果酸以及不含有机酸的对照溶液对红壤中Cd的解吸率都快速下降。

Methods The CSF concentrations of DA,5-HT,5-hydroxyindole acetic acid(5-HIAA) and homovanillic acid were assayed by high-performance liquid chromatography in the patients with viral encephalitis and meningoencephalitis(67 cases),schizophrenia(37 cases) and other diseases(21 cases).

方法对病毒性脑炎和脑膜脑炎患者67例、精神分裂症患者37例和病例对照患者21例采用高效液相色谱法检测其脑脊液中5-HT、DA、5-羟吲哚乙酸(5-HIAA)和高香草酸水平，并进行比较。

Methods The CSF concentrations of DA, 5HT, 5hydroxyindole acetic acid (5HIAA) and homovanillic acid were assayed by highperformance liquid chromatography in the patients with viral encephalitis and meningoencephalitis (67 cases), schizophrenia (37 cases) and other diseases (21 cases).

对病毒性脑炎和脑膜脑炎患者67例、精神分裂症患者37例和病例对照患者21例采用高效液相色谱法检测其脑脊液中5HT、DA、5羟吲哚乙酸（5HIAA）和高香草酸水平，并进行比较。

Here are a few guidelines for using oxalic acid to remove iron stains from minerals like smoky quartz and microcline.

这里有一些指引，用草酸除铁污渍从矿物像黑烟石英和钾长石。

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。