Separation of Catechol and Hydrochinone by High-Speed Countercurrent Chromatography 利用高速逆流色谱分离邻苯二酚和对苯二酚
Conclusion Compound hydrochinone cream is effective, safe and it is an ideal therapy for chloasma. 结论复方氢醌霜疗效好,安全性高,是治疗黄褐斑的理想方法之一。
Objective To prepare and observe the clinical efficacy and safety of the compound hydrochinone cream in the treatment of chloasma. 目的制备并观察复方氢醌霜治疗黄褐斑的临床疗效和安全性。
According to adding pyrocatechol, hydrochinone, and bisphenol A, which modify synthesis of phenolic resin and analyse effect of all the factors on the properties of the resin sand. 通过加入邻苯二酚、对苯二酚、双酚A等对酚醛树脂的合成进行改性,并分析各元素对树脂砂抗压强度的影响。