Explain why an equimolar mixture of D-glucose and D-fructose formed by hydrolysis of sucrose is called invert sugar in the food industry.

解释为什么蔗糖水解产生的D -葡萄糖和D -果糖等摩尔的混合物在食品工业上称为转化糖？

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On a molecular level, D-tagatose is structurally identical to D-fructose, except for an inversion of the hydroxyl and hydrogen groups at the fourth carbon atom.

塔格糖是果糖的“差向异构体”，在分子水平上，除了第四个碳原子上的羟基和氢基团倒置外，D -塔格糖与D -果糖的结构是一样的。

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The kinetics of the isomerization of D-glucose and D-fructose was studied on the immobilized enzyme.

用国产异构化酶在固定床中研究了D -葡萄糖与D -果糖异构化反应动力学。

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