Figure 2


3D response surface plot for the effect of different factors on AuNPs biosynthesis and factor-factor interactions between (a) casein hydrolysate and dextrin (b) casein hydrolysate and initial pH (c) casein hydrolysate and inoculum size (d) casein hydrolysate and temperature (e) dextrin and initial pH (f) dextrin and inoculum size (g) dextrin and temperature (h) initial pH and inoculum size (i) initial pH and temperature (j) inoculum size and temperature.