Processing operation 1st degree equation RI
Cold smoking (AFR) y = 0.992x + 0.053 0.9999
Warm smoking (AFC) y = 0.836x + 5.102 0.9959
Pasteurization (PST) y = 0.828x + 3.277 0.9975
Frying (FR)   y = 0.464x + 23.838 0.8919
Baking (CO) y = 0.468x + 2.586 0.9532
Stewing under pressure (IN) y = 0.712x + 3.539 0.8875
Table 5: Mathematical models of first degree equations for thermal treatments