Ammonium chloride is a better eluant, and L-leucine and L-valine can be separated successfully by gradient elution.
结果以氯化铵作洗脱剂进行梯度洗脱，成功的将l亮氨酸与l缬氨酸分离。
The preparation of D-proline and D-valine by configuration transformation from L-proline and L-valine has been intensively studied.
本文研究了以L-脯氨酸和L-缬氨酸为原料，通过构型转换制备D-脯氨酸和D-缬氨酸的工艺。
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