Optical indicators based on cholesteric liquid crystal polymers

Optical indicators based colored polymers are autonomous responsive labels that provide an optical signal to represent a specific exposure over time. Polymers that possess a high degree of order can establish structural color, ...

Crowding-induced stress gives mackerel the blues

When mackerel die, they change color from green to blue. After seeing that live mackerel can also turn blue, a team of researchers wondered if this was because the fish were under stress. Their concerns proved to be correct.

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