Table 2 Inactivation rate constants and decimal reduction times of E. coli by intense pulsed light treatment with various packaging films

			Inactivation rate constants (s-1)		Decimal reduction times (s)
			k 1	k 2	D 1	D 2
			Packaging film materials	Control		0.329	-	7.00	-
PE	30 μm	0.303	0.024	7.60	96.0
	40 μm	0.300	0.026	7.68	88.6
	50 μm	0.296	0.028	7.78	82.3
	70 μm	0.287	0.031	8.02	74.3
PP	30 μm	0.293	0.026	7.86	88.6
	40 μm	0.287	0.028	8.02	82.3
	50 μm	0.281	0.029	8.20	79.4
	70 μm	0.273	0.031	8.44	74.3
OPP	30 μm	0.292	0.026	7.89	88.6
	40 μm	0.287	0.028	8.02	82.3
PET	100 μm	0.018	0.003	127.9	767.7
	120 μm	0.014	0.003	164.5	767.7

Treatment condition : 1000 V, 5 pps, distance : 1.5 cm