第二，利用四因子二次正交旋转设计，探讨乳酸钠与保鲜剂山梨酸钾、丙酸钙和乳酸链球菌素（nisin）之间的相互作用。
In the second section , applying four factors quadratic rotating design , we studied the reciprocity between sodium lactate and potassium sorbate , calcium propionate , or nisin .
山梨酸钙