查询词典 quaternary

To overcome the deficiency in managing and operating the global data of both Longitude-Latitude Grid and Quaternary Triangular Mesh, a new discrete global grid-Degenerate Quadtree Grid is put forward, and its tessellating principle and coding rule are presented. Then, its geometrical distortion is calculated and analyzed in details.

为有效解决经纬度格网与四元三角网在全球空间数据管理与操作中存在的不足，提出一种新的全球离散格网剖分方法―球面退化四叉树格网，给出该格网的剖分原理与编码规则，并对其进行几何变形计算与分析。

It showed that the capability of flocculation of quaternary ammonium salt of alkali ligninto black acid ATT was good.

对于麦草碱木质素季胺盐，实验表明：木质素季胺盐对酸性黑ATT染料溶液的絮凝效果较好。

Quaternary ammonium iron reacted with sulfonate groups of black acid ATT and an insoluble substance was produced.

木质素季胺盐中的季铵离子与酸性黑ATT染料中的磺酸

The decolorization rate of black acid ATT was 78% when the dosage of quaternary ammonium salt of alkali lignin was 1184.5mg/L.

当处理后木质素季胺盐为1184.5mg/L时，酸性黑ATT染料溶液脱色率为78%。

The inhibition action of chitosan quaternary ammonium was studied for carbon steel in sulfuric acid.

研究了壳聚糖季铵盐作为单组分缓蚀剂对碳钢在硫酸溶液中的缓蚀性能，以及缓蚀剂浓度、温度、时间和特性粘度、取代度等因素对缓蚀效果影响。

The surfactant contains quaternary ammonium group; b, the surfactant is a complex macromolecule which takes the yellow humic acid as the main body , has no fixed compounds and can be degraded in nature.

含有季铵盐基团；b。以黄腐植酸为主体，是一种复杂的有机大分子，没有固定的组成，在自然界中就可以分解。

The alkylation of a-methylene of PhSO2CH2COPh with alkyl halides catalyzed by quaternary ammonium base resin in 50% aqueous sodium hydroxide solution was investigated.

本文以季铵碱树脂作为聚合物固载的相转移催化剂，在50%氢氧化钠水溶液中催化α-苯磺酰基苯乙酮(1)的α-亚甲基的烷基化反应。

ConclusionIn Radix Tinosporae alkaloid mostly is the amine quaternary ammonium base, the water-solubility is strong,suitable for extraction with high polar solvent.

结论金果榄中的生物碱大多为季铵碱，水溶性较强，适合用极性较大的溶剂进行提取。

Chiral SalanCrX complexesa saturated version of SalenCr(ⅢX are designed,and in conjunction with an ionic quaternary ammonium salt or organic strong base can efficiently catalyze the asymmetric,regio-and stereoselective alternating copolymerization of CO_2 with rac-PO at mild conditions to afford isotactic-enriched polycarbonates with～95%head-to-tail linkages and moderate enantioselectivity.

本论文在Salen构型配体的基础上，设计合成了一系列手性Salan型铬配合物，并将其与季铵盐/有机强碱组成亲电-亲核双组分催化体系，在室温下可以有效的催化CO_2和环氧丙烷的不对称交替共聚反应，实现了CO_2和环氧丙烷的不对称交替共聚反应的区域和立体化学控制，得到95%的头尾连接单元和中等光学纯度(对映体过量值ee%≈70%)的全同结构的聚碳酸酯。

Furthermore, it was found that the quaternary structure of bar-headed goose R state Hb is quite different from that of human R state Hb, but greylag goose Hb is similar with human Hb. Analysis indicates that this difference is caused by α63 mutation.

此外发现斑头雁血红蛋白的R态四级结构与人血红蛋白的R态有较大差异，而灰雁血红蛋白则与人血红蛋白接近，分析发现这种差异是α63突变造成的。

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。