Abstract: Using red bean as the research material, the nitrate reductase单位 NR) activity was detected with a kit. The results showed that the value of the treatment was similar or even smaller than the control when operating according to the manual. Though the gradient experiments of enzyme amount and heat preservation time at 37℃, it was denied that the enzyme activity caused such phenomena. After adjusting the elements in control, this phenomenon disappeared. Therefore, the adjusting control is more reasonable.

Key words: nitrate reductase 单位 NR), red bean, control