Table 1 Linear regression models and diffusion parameters for the diffusion of nisin in the gel systems containing agar at 1, 2 and 3% (w/v)

Concentration of agar gels	Linear regression equation	R 2	Maximum release	Slope	Diffusion coefficient (D, cm 2 /s )
1%	Y=-0.1251X-0.6782	0.997	86.0	-0.1251	1.2×10-2
2%	Y=-0.0812X-0.8358	0.947	77.1	-0.0812	8.2×10-3
3%	Y=-0.0446X-0.8079	0.845	71.9	-0.0639	6.4×10-3