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  Indian J Med Microbiol
 

Figure 4: Response surface plots and contour plots of the interactions between acetic acid concentration (χ1, %), temperature (χ2, °C), and time (χ3, min)

Figure 4: Response surface plots and contour plots of the interactions between acetic acid concentration (χ<sub>1</sub>, %), temperature (χ<sub>2</sub>, °C), and time (χ<sub>3</sub>, min)