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. 2016 Mar 18;6:23405. doi: 10.1038/srep23405

Figure 3.

Figure 3

(a) SERS spectra of OA/ALA with different molar radios. (b) Relationship between the normalized S1656 value and the normalized ETC of OA corresponding to (a). (c) Relationship between the normalized S1656 value and the normalized OA content corresponding to Fig. 1(b). Error bars are marked.