查询词典 oxalic

In the course of oxidation, reaction temperature should rise step by step, and in the late stage, reduced pressure distillation should follow so that the concertration of gly oxalic acid can rise and production rate of allantoin can rise up to 40%.

在氧化反应的过程中逐步地提高反应温度，反应后期进行减压浓缩，提高了乙醛酸的浓度，缩短了氧化时间，并使尿囊素産率达到40%。

Two methods for the determination of magnesium in rare earth-magnesium middle alloy by EDTA titrimetry, i. e. oxalic acid precipitation and ammonium hydroxide precipitation, were studied.

研究了分别采用草酸和氢氧化铵沉淀分离稀土镁中间合金中的稀土，EDTA络合滴定法快速测定电解稀土镁中间合金中镁的两种方法。

TCCA,SDIC,calcium hypochlorite,citric acid,potassium sorbate,sorbic acid,sodium chlorate,polymeric polyol,sodium persulfate,ammonium persulfate,ascorbic acid,sodium benzoate,thiourea,thiourea dioxide,oxalic acid.

提供产品：三氯异氰尿酸，二氯异氰尿酸钠，漂粉精，柠檬酸，山梨酸钾，山梨酸，氯酸钠，聚合多元醇，过硫酸钠，过硫酸铵，维生素C，苯甲酸钠，硫脲，二氧化硫脲，草酸。

The results were as follows:Afterthe NH_4Y zeolite was dealuminated with Oxalic acid,the conversion of pinenespeeded up markedly, but the selectivity of camphene also dropped downmarkedly.After the NH_4Y zeolite was infused in solution of Mg(NO_3)_2,Zn(NO_3)_2 or Al(NO_3)_3 to remove corresponding oxide,the conversion rate of pinenedropped down,and the selectivity of camphene had little increase.

结果表明：NH_4Y型沸石分子筛经草酸脱铝后，蒎烯转化显著加快，但莰烯的选择性也显著下降；而NH_4Y型沸石分子筛经硝酸镁、硝酸(来源：caAB3aC论文网www.abclunwen.com)锌、硝酸铝溶液浸渍来负载相应的氧化物后，蒎烯转化率有所下降，莰烯选择性稍有增加。

A felt or other cloth lap is wetted with an oxalic acid solution for a final polishing step after the piece is finished with fine, wet carborundum paper.

1体验或其他布立是润湿与草酸溶液作最后一步抛光后，一块成品的是，以优秀的，湿碳化硅文件。

Polyethersulfone with cardo was a developed engineering thermoplastic and membrane material with high glass transition temperature,PES-C ultrafiltration membranes were prepared by phase inversion method using dimethylacetamide as solvent and oxalic acid and polyethylene glycol as additives.The membrane morphology forming and evolution could be observed by the experimental system and method.The effect of additive and polymer concentration on cast solution and the gelation kinetics of polyethersulfone with cardo asymmetric membrane were studied.

采用耐高温工程塑料——含酚酞侧基的聚芳醚砜为膜材料，草酸和聚乙二醇为添加剂， N，N -二甲基乙酰胺为溶剂，并利用改进的凝胶动力学实验装置和方法，使之能真实地再现不同膜孔结构生长及发展演化的过程，借助相关软件对图像进行处理，考察了添加剂、聚合物浓度对铸膜液凝胶速度的影响，对酚酞基聚芳醚砜非对称膜的凝胶过程的动力学进行研究。

In general, in citric acid and oxalic acid solution, kaolinite nearly dissolved congruently in reactive metaphase or anaphase; In malic acid solution, stoichiometry of kaolinite dissolution is complex.

对于柠檬酸和草酸而言，一般情况下，高岭石是在反应中期或后期才趋于同步溶解；而对于苹果酸而言，高岭石溶解同步性较为复杂。4 有机酸能促进高岭石中 K+、Na+、Ca2+、Mg2+等盐基离子的释放，甚至在较低的浓度(100μM)。

The preparation of polymer is required for high purity of glycolic acid, if not, low-weight polymer is obtained, therefore, high purity glycolic acid is scarce in the market. So, the research for the synthesis of glycolic acid is essential. In domestic and overseas, there are many methods for preparation of glycolic acid, including glycin oxidation, cyanogenesis, aldehyde oxidation, coupling of maldehyde and methyl formate, oxalic acid electrolysis, chloroactic acid hydrolysis and so on.

制备羟基乙酸的聚合物时，对羟基乙酸单体的纯度要求较高，否则得到的聚合物分子量较低，导致高纯度羟基乙酸的需求量逐年增长，目前在国内，高纯度的羟基乙酸还没有形成工业化规模生产，对羟基乙酸的合成进行研究是非常有意义的。

Thus, the method can only be used to the cyclization of N~4-aryl-4,5,6-triaminopyrimidine with oxalic acid.

在合成各类化合物的过程中，共得到未见文献报道的新型中间体50多个，并根据其结构特征，用相应的光谱对其结构进行确证。

Methods 7 kinds of antibiotics, dexamethasone phosphate disodium salt and salicylic acid were separated on a C18 column using methanol: acetonitrile-aqueous solutions:0.01mol/L oxalic acid=l1:22:67 as the mobile phase at a flow rate of 0.8ml/min, with the column temperature 25℃ and detection wave 240nm and 268nm.

采用C18色谱柱(4.6mm×250mm， 5μm)，以甲醇：乙腈：0.01mol/L草酸＝11：22：67为流动相，流速为0.8ml/min，检测波长为240和268nm，柱温为25℃，在此色谱条件下进行检测。

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。