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. 2016 Nov 10;7:13377. doi: 10.1038/ncomms13377

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Copyright © 2016, The Author(s)

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(a) LC spectra of 4-NP-a before and after the treatment with COP-99. (b) ultraviolet–visible spectra of mixed dye solution before and after passing through a packed column of COP-99. The initial dye mixture was prepared in a 1:1 v/v ratio of 50 μM BBG and 30 μM 4-NP-b. Inset displays the photograph of the actual column tested in the study.