查询词典 oxalic acid

The comparison for advantages and application scopes of both methods were carried out. The results show that the former is quicker, but the adding amount of oxalic acid needs to be controled in the range of 1.2-1.7 times of theoretical value and the content of iron in the alloy is required to be below 0.5%. While the later is overelaborate, but it can completely separate magnesium from iron with sharp titration end point.

分析对比了两种方法的适用范围，结果表明，草酸分离稀土方法简便快速，但草酸用量需控制在理论用量的1.2~1.7倍，且合金中铁含量要求小于0.5%；氢氧化铵分离稀土方法分析流程比前者长，但可将主要干扰杂质铁分离完全，终点敏锐。

In this paper, high-level quantum chemistry calculation methods are used to theoretically investigate basic configuration, conformers, torsion potential energy surface and internal rotation transition state of oxalic acid and oxalyl halides.

第三章采用量子化学的MP2、B3LYP、HF计算方法在6-311++G~水平上，对草酸可能存在的十三种构型进行完全放开的全几何优化及振动频率分析，得到八种稳定构型和五种内转动过渡态构型。

Several types of ligand reactions observed under hydrothermal condition were summed up:(1) hydrolysis of pyridine nitrile, aldehyde and ester in mixed water and alcohol into pyridine-carboxylate;(2) replacement of carboxylate group with sulfonic group;(3) coupling of phenanthroline by dehydrogen;(4) oxidative coupling of methanol into oxalic acid;(5) hydroxylation of isophthalate.

总结了以往在水热条件下观察到的几类配体反应：（1）吡啶腈、醛和酯在醇和水混合溶液中水解成吡啶羧酸；（2）磺基取代羧基反应；（3）邻菲啰啉的脱氢的聚合：（4）甲醇被氧化偶合生成草酸：（5）间苯二甲酸的羟基化反应。

Both Sclerotinia resistance and oxalic acid tolerance were significantly increased in senescence leaves of T1 lines.

转基因植株叶片尤其是衰老叶片对核盘菌的抗性及对草酸毒素的耐性均得到了增强。

It was showed that the growth speed of hypha, sclerotinia production and the pathogenicity of strains had little relation with host and geographical location. The ability of oxalic acid production of strains had positive relation with the pathogenicity. In order to study the nutrition aptness, 8 kinds of culture mediums were tested and the result showed that S.

sclerotinia不同菌株菌丝的生长速度、菌核产量、致病力与其地理来源和寄主来源关系不大，对12个代表菌株的草酸产生能力的测定表明，菌株的草酸产生能力和病菌的致病性基本呈正相关，致病力较强的菌株草酸产生能力较强；采用8种培养基对代表菌株营养条件进行了研究，结果表明核盘菌S。

Whewellite is the product by the action between calcite and oxalic acid secreted by plants affer ice tongues retreated.

水草酸钙则是冰退后沉淀的方解石与植物分泌的草酸反应的产物。

The oxalic acid degumming process, the production effect and its influence on the following procedure were described.

通过对多种脱胶方法的试用和比对，发现草酸脱胶法对米糠浸出毛油脱胶效果比较理想。

In this study,a HPLC system equipped with an Aminex HPX-87H column was applied to determine oxalic acid in bleaching filtrates.

本研究以一个基于阴离子交换柱的离子交换色谱法作为对照方法，利用一套配备了AminexHPX-87H液相色谱柱的高效液相色谱系统测定漂白废液中的草酸浓度。

Analysis and control of oxalic acid in bleaching filtrates has recently gained considerable attention in the pulp and paper industry due to problems with the formation of calcium oxalate scaling.

近年来草酸钙的形成在制浆造纸工业中造成诸多问题，因此如何分析及控制漂白废液中的草酸浓度就显得尤为重要。

Wool, silk besmirch can choose alcohol off color, then the float to remove traces of color of oxalic acid.

羊毛、丝绸上的污渍可选用酒精脱去浮色，然后用稀草酸去除色底痕迹。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。