Precipitation by oxalate is the primary method to produce rare earth oxides. 稀土草酸鹽沉澱法是製備稀土氧化物的主要方法。
The optimum method for purifying Konjac glucomannan is found through comparative study of various methods. 對不同方法純化魔芋葡甘露聚糖進行了研究,酶法結合乙醇沉澱法是最佳提純魔芋葡甘露聚糖的方法。