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蔗糖是二糖吗
更新时间: 2019-04-22 00:00:00  

是。二糖也称为双糖,由二分子的单糖通过糖苷键形成。双糖是在一种单糖的还原基团和另一种糖的醇羟基相结合的情况下,显示出与单糖的共同化学性质,诸如还原于Fehling溶液、变旋光化、脎形成等(如麦芽糖、乳糖),通过还原基结合的单糖则无这种性质(如蔗糖、海藻糖)。

蔗糖:

是人类基本的食品添加剂之一,已有几千年的历史。以蔗糖为主要成分的食糖根据纯度的由高到低又分为:冰糖、白砂糖、棉白糖和赤砂糖(也称红糖或黑糖)。蔗糖容易被酸水解,水解后产生等量的D-葡萄糖和D-果糖。不具还原性。发酵形成的焦糖可以用作酱油的增色剂。

关键词: 蔗糖

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