Precipitation by oxalate is the primary method to produce rare earth oxides. 稀土草酸鹽沉淀法是制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(jìn)行了研究，酶法結合乙醇沉淀法是最佳提純魔芋葡甘露聚糖的方法。
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