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Lucky dips

作者:沃稣    发布时间:2019-03-08 02:06:12    

A dipstick that changes colour may one day test for anything from viruses to food bugs. Ulrich Jonas of the Max Planck Institute for Polymer Research in Mainz and his colleagues at the Lawrence Berkeley National Laboratory in California altered a coloured polymer that irreversibly changes from blue to red when exposed to a chemical trigger. The team made this change reversible by reinforcing the links between the polymer’s units, so that the switch did not disrupt its structure. The researchers, who will report their work in a forthcoming issue of the Journal of the American Chemical Society,

 

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