Enceladus' geysers could have delivered sodium from its underground ocean and into Saturn's E ring

土卫二的喷发泉有可能将存在于其内部地下海洋的钠元素喷发至土星的E环中。

youdao

Objective: To improve the clearity of bacterial inhibition ring is edge during the test of foscamet Sodium microorganism titer evaluation.

前言： 目的：提高磷甲酸钠微生物效价测定过程中抑菌圈边缘的清晰度。

youdao

Using sodium dicyandiamide and saccharin as raw materials, tribenuron-methyl is synthesized via ring-opening reaction, phosgenation and condensation with total yield of 57.

以双氰胺钠和糖精为起始原料，经过开环、光气化、缩合等一系列反应制备了苯磺隆，合成反应的总收率可达57。

youdao