The producing technology, the productformula and the stability of frozen storage were studied in this experiment.
以轮叶党参为主要原料，对轮叶党参冷冻调理食品的加工工艺、产品配方及冻藏稳定性进行了研究。
2
The formulas calculating higher derivatives of parametric functions and composite functions are given by the chain rule and the productformula for derivatives.
用函数的链式法则和乘积公式给出了参数函数和复合函数的高阶导数的计算公式。
3
The experimental results indicated that the preparation of effective copper subsulfate, processing technology, and productformula were all superior to those of other domestic products.