Cholesteric Liquid Crystals
Some cholesterol derivatives (among other simple cholesteric lipids) are known to generate the liquid crystalline "cholesteric phase". The cholesteric phase is, in fact, a chiral nematic phase, and it changes colour when its temperature changes. This makes cholesterol derivatives useful for indicating temperature in liquid crystal display thermometers and in temperature-sensitive paints.
Read more about this topic: Cholesterol
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