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Fluorescence spectra of WWat and WWgc in water. From left to right: normalized emission spectrum λex: 280 nm (green line: 10 mg/mL; orange line: 0.5 mg/mL); emission spectrum λex: 330 nm (blue line) at 10 mg/mL; excitation (red line) and emission (black line) spectra with λex: 360 nm and λem: 450 nm at 10 mg/mL.
