查询词典 phosphoric

It was found that thiocyanate had catalytic effect on the oxidation of phenol red by potassium bromate in phosphoric acid medium.

在磷酸介质中，硫氰酸根对溴酸钾氧化酚红的褪色反应具有较强的催化作用。

Natural remedies for colic include bryonia alba, colocynths, chamomile, magnesia phosphoric, pulsatilla, and many others.

自然的补救措施，包括绞痛bryonia阿尔巴， colocynths ，甘菊，磷酸镁，白头翁，和许多其他问题。

The result indicated :(1) phosphoric acid could effectively reduce the pH value in calcareous soil .

试验结果表明：①磷酸能有效地降低石灰性土壤的pH值，在本试验条件下，要使土壤pH值由8.89降低到6.0左右，最佳酸用量为3.27g。

1 At a reaction temperature of 100 ℃ and a reaction time of 30 min to give 2,which was then subjected to condensation reaction with p-propoxy mandelic acid in the presence of phosphoric acid at a molar ratio of m(2)∶m( p-propoxy mandelic acid )∶m=1∶1∶1 at a reaction temperature of 60 ℃ for 3 h to yield 3,which was further oxidized by chloranil to give t.

对现有分散红356合成工艺进行了优化，以n∶n=1.2∶1投料，100℃反应30 min得缩合物2，再在等质量磷酸催化下与分批加入的等质量对丙氧基扁桃酸60℃缩合3 h得缩合物3，经温和氧化剂四氯苯醌氧化得标题化合物，总收率55%。

It is composed mostly of B vitamins, phosphoric acid, choline, linoleic acid and inositol.

它是组成，其中大部分B族维生素，磷酸，胆碱，亚油酸和肌醇。

The reported organocatalyst for asymmetric Mannich reaction include proline derivatives, chiral phosphoric acids, chiralurea derivatives, cinchona alkaloids and so on, which can catalyze the asymmetric Mannich reaction with high catalytic activity and excellent enantiselectivity.

本文评述了各类有机催化剂在有机催化不对称Mannich 反应中的应用研究进展，以及不对称诱导反应的机理、催化剂分子结构及反应条件对其催化活性和不对称诱导作用的影响。

One of the active ingredients in Coca Cola is phosphoric acid.

可口可乐的其中一种主要成分是磷酸。

Ltd. The results show that in contrast to phosphoric acid catalyst, the production of cumene on zeolite catalyst exhibits low operating cost, high product yields, high product purity and little corrosion.

结果表明，采用沸石分子筛催化剂生产异丙苯，与固体磷酸催化剂相比，具有收率高、产品质量好、操作费用低、无腐蚀等优点。

A transparent dilatant fireproof coating was prepared,based on a modified urea-formaldehyde resin as binder,and phosphoric acid and starch as fire retardant.

以改性脲醛树脂为基料，磷酸和淀粉为阻燃剂制得膨胀型透明防火涂料。

In the presence of the combination of sulphuric and phosphoric acid, with sodium diphenylamine sulfonate as the indicator, standard solution of potassium dichromate was used to titrate total iron value.

试样以盐酸溶解后，在酸性介质中，先以氯化亚锡将三价铁大部分还原为二价，然后在钨酸钠指示下，再以三氯化钛将剩余的三价铁还原为二价，过量的三氯化钛以重铬酸钾氧化消除干扰，在硫磷混合酸存在下，以二苯胺磺酸钠为指示剂，用重铬酸钾标准溶液滴定全铁量。

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。