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(A) The real-time measurement curves obtained for different concentrations of Y. enterocolitica in milk, using 5000 ppm GQDs as enzyme mimics. (B) The quantification of Y. enterocolitica in milk; inset: Regression analysis resulting in R2 value 0.98 (n = 6). (C) Overall results of Y. enterocolitica detection in human serum; inset: Regression analysis resulting in R2 value of 0.98 (n = 6). The bacterium was measured in a concentration range of 1‒6.23×108 cfu mL−1 for both assays.
