草酸

The synthesis of diethyl oxalate and oxalic acid by catalytic coupling reaction of carbon monoxide in gaseous phase at normal pressure is one of important projects of C〓 chemical technology.

CO常压、气固相催化偶联合成草酸和草酸酯等是目前碳一化学研究的重要课题之一。

However,the removal of soil noncrystalline aluminum with DCB soultioncaused an obvious decrease of soil SSA.3.The hydroxy aluminum in the interlayer of 1.4nm intergrade mineralhad an important negative effect on the cation exchange capacity ofsoil colloids.Its removal would cause a significant increase in CEC valuesof the soil colloids.4.Free aluminum was the major carrier of phosphate adsorption of soilcolloids.Particularly,the active aluminum had a decisive effect on thecapacity of phosphate adsorption of soil colliods.5.Addition to the effects of other soil constituents on soil surfaceproperties,it was thought that the effect of soil free aluminum,especially active aluminum on soil surface properties,deserved closeattention.

焦磷酸钠、草酸铵、DCB、柠檬酸钠和NaOH提取的土壤铝对提高土壤CECv、AEC、PZC和PZNC起重要作用，尤以活性铝的作用较大。2）用草酸铵处理除去铝后，土壤比表面积变化不大或略有增加；用DCB处理除去土壤铝后，土壤SSA明显降低。3）层间羟基铝对土壤胶体的阳离子交换量有显著负贡献，用柠檬酸钠将之除去后，土壤胶体的阳离子交换量明显增加。4）土壤胶体中的游离铝是土壤胶体吸附磷的主要载体，尤其是其中的活性铝，对土壤胶体的磷吸附能力起决定性作用。5）除其它土壤组分对土壤表面性质的影响外，土壤中的游离铝、尤其是活性铝对土壤有关表面性质的影响，值得引起特别的重视。

Taking 2% oxalic acid and 10% hydrochloric, mixture of 2% oxalic acid and 4% acetic acid as extraction agent, the content of vitamin C was determined by using iodometry.

方法］以2%草酸、10%盐酸以及2%草酸和4%醋酸的混合液作为提取试剂，对4种蔬菜中维生素C进行提取，并用碘量法测定蔬菜中维生素C的含量。

The method was based on the inhibitory effect of oxalic acid on the oxidation of isatin by H 2O 2 enhanced by non-ionic surfactant-Triton X-100 in the HCl medium.

在稀盐酸介质中，微量草酸对H2 O2 氧化靛红的褪色反应有显著的阻抑作用，非离子表面活性剂TritonX 1 0 0对此体系有强烈的增敏作用，据此建立了表面活性剂增敏阻抑动力学光度分析测定微量草酸的新方法。

The results indicate that the addition of ESPS could inhibit the growth of calcium oxalate monohydrate and induce the formation of calcium oxalate dihydrate crystals.

结果表明，添加ESPS能抑制一水草酸钙的生长，同时诱导二水草酸钙晶体的形成。

Oxalic acid and calcium oxalate monohydrate crystals have toxic effects on normal human HK-2 cells and cause changes in protein expression,which may play an important role in the formation of renal calculi.

草酸和一水草酸钙可对正常人HK-2细胞产生毒性损伤，造成细胞表达蛋白的改变，可能在肾结石的形成中起重要作用。

The tolerance of ruminants to oxalate can be increased by gradually increasing the amount of oxalate in the diet.

通过在饲料中逐渐添加草酸可以提高反刍动物对草酸的耐受性。

Oxalic acid and its salts are used in many chemical processes.

草酸和草酸盐用于许多化学作用。

Many medical study found that oxalic acid in food absorption, the urinary excretion of oxalic acid also significantly increased.

许多医学研究发现，食物中的草酸吸收之后，尿液中的草酸排泄量也会明显上升。

Using oxalic acid solution (water 100 1), oxalate warm water for about 10 minutes, then rinse.

用草酸溶液（水100份，草酸1份）温水浸泡约10分钟，再用清水漂洗。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。