Turning a linear sugar into its cyclized form is an essential skill in biochemistry. A simple paper model is described that can be used by any student to transform a carbohydrate in its Fischer projection and correctly cyclize it into its Haworth form. The model can also be used to illustrate several key aspects of the Fischer projection of which many students are typically unaware.

中文翻译：

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一个简单的纸模型说明了如何将Fischer投影中的单糖环化为Haworth

将线性糖变成其环化形式是生物化学中的一项基本技能。描述了一个简单的纸模型，任何学生都可以使用该模型来转换其Fischer投影中的碳水化合物并将其正确环化为Haworth形式。该模型还可用于说明许多学生通常不了解的Fischer投影的几个关键方面。