一类弱酸性有机合成物，分子中含有一个或更多羟基。
An anhydride formed by the removal of a water molecule from the hydroxyl and carboxyl radicals of hydroxy acids.
壳聚糖是一种天然高分子，分子中含有大量的氨基和羟基，对金属离子有很好的吸附能力。
Chitosan is one of the most abundant natural polymers, This biopolymer has useful functional groups such as hydroxyl and amine, so it can interact with metal ions.
十一员环上带有一个环氧基和一个环外双键，分子中含有两个叔羟基和一个伯羟基。
An epoxide group and an out-ring double-bond are attached to the 11-membered ring. The molecule contains one primary and two tertiary hydroxyl groups.
壳聚糖分子中含有大量的氨基和羟基，可以进行多种化学改性，得到相应的衍生物。
Chitosan can be modified chemically, due to the existence of amino and hydroxyl groups, and both chitosan and its derivatives can be used as adsorbents for heavy metal ions.
壳聚糖分子中含有大量的氨基和羟基，可以进行多种化学改性，得到相应的衍生物。
Chitosan can be modified chemically, due to the existence of amino and hydroxyl groups, and both chitosan and its derivatives can be used as adsorbents for heavy metal ions.
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