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。
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。
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。
Pharmaceutical Intermediates species: Sodium Cyanate, Potassium Cyanate, Subsalt of Heat Treatment, the Main Ring of Promethazine Hydrochloride, Promethazine Hydrochloride Side Chain.
医药中间体种类：氰酸钠、氰酸钾、热处置基盐、盐酸异丙嗪主环、盐酸异丙嗪侧链。
Treatment of 1, 3-diketones containing benzoyloxy group in 1% aqueous sodium hydroxide can afford directly the corresponding ring-A hydroxylated flavone.
用1%的氢氧化钠水溶液处理带有芳酰氧基的1,3 -丙二酮衍生物可以直接得到A环带有羟基的黄酮化合物。
Treatment of 1, 3-diketones containing benzoyloxy group in 1% aqueous sodium hydroxide can afford directly the corresponding ring-A hydroxylated flavone.
用1%的氢氧化钠水溶液处理带有芳酰氧基的1,3 -丙二酮衍生物可以直接得到A环带有羟基的黄酮化合物。
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