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. 2023 May 31;21(6):338. doi: 10.3390/md21060338

Figure 1.

Figure 1

UV–vis absorption spectra of (a) CQDs based on agarose; (b) chondroitin sulfate; (c) carrageenan; (d) chitosan. Reproduced with permissions from (a) [40]; (b) [41]; (c) [42]; (d) [43].