Table 2. Correlation coefficient between surfactin production (mg/kg) and physicochemical quality evaluation of cheonggukjang viscous substances for fermentation time

	pH	Color difference	Refractive index	Abs	Surface tension	Protein
Surfactin production	0.984**,1)	0.960**	0.997***	0.982**	−0.822	0.989**

p<0.01
p<0.01
p<0.001 (two-tailed).