Table 4.

Inactivation parameters of Geeraerd et al. (2000) model for L. monocytogenes and S. Typhimurium planktonic cells and biofilms after treatment with plasma activated liquids of different ages.

Microorganism	Cell type	PAL age	Population	Inactivation parameters			RMSE	1log reduction2
				1log N0 (log [CFU/mL)]2 / 1log N0 [log(CFU/cm2)]2	1kmax (1/min)2	1log Nres [log(CFU/mL)]2 / 1logNres [log(CFU/cm2)]2
Listeria monocytogenes	Planktonic cells	0 days	Total	6.8 ± 0.71	2.572 ± 0.8102	1.3 ± 0.4	1.3619	25.5 ± 0.82
			Uninjured	6.5 ± 0.51	19.272 inf	1.2 ± 0.3	1.0609	25.3 ± 0.62
		3 days	Total	6.9 ± 0.01	10.001 ± 0.0051	–	0.0965	≈ 10.0 ± 0.01
			Uninjured	6.9 ± 0.01	10.001 ± 0.005	–	0.1028	≈ 10.0 ± 0.01
		10 days	Total	6.9 ± 0.01	10.001 ± 0.0041	–	0.0742	≈ 10.0 ± 0.01
			Uninjured	6.9 ± 0.01	10.001 ± 0.003	–	0.0656	≈ 10.0 ± 0.01
		30 days	Total	6.9 ± 0.01	10.002 ± 0.0041	–	0.0791	≈ 10.1 ± 0.01
			Uninjured	6.9 ± 0.01	10.006 ± 0.004	–	0.0789	≈ 10.1 ± 0.01
	Biofilms	0 days	Total	7.3 ± 0.12	6.017 inf	4.3 ± 0.11	0.4363	13.0 ± 0.13
			Uninjured	7.2 ± 0.12	6.022 inf	4.0 ± 0.11	0.5238	13.2 ± 0.13
		3 days	Total	7.3 ± 0.32	20.703 ± 0.230	5.4 ± 0.23	0.5604	21.9 ± 0.42
			Uninjured	7.2 ± 0.32	20.704 ± 0.236	5.2 ± 0.23	0.6054	22.0 ± 0.42
		10 days	Total	6.8 ± 0.31	20.565 ± 0.187	4.7 ± 0.22	0.6262	22.1 ± 0.42
			Uninjured	6.6 ± 0.31	20.548 ± 0.173	4.4 ± 0.22	0.6310	22.2 ± 0.42
		30 days	Total	6.9 ± 0.31,2	10.588 ± 0.579	5.9 ± 0.24	0.6504	21.0 ± 0.41
			Uninjured	6.8 ± 0.31,2	20.511 ± 0.292	5.6 ± 0.24	0.5645	21.2 ± 0.41
Salmonella Typhimurium	Planktonic cells	0 days	Total	7.1 ± 0.51,2	12.962 ± 1.9952	1.5 ± 0.3	1.1517	25.6 ± 0.62
			Uninjured	7.1 ± 0.51	22.667 ± 0.6152	1.3 ± 0.31	1.0945	25.8 ± 0.63
		3 days	Total	7.0 ± 0.11	10.015 ± 2.2131	7.0 ± 4.4	0.2320	10.0 ± 4.41
			Uninjured	7.0 ± 0.21	10.117 ± 0.1031	6.1 ± 0.53	0.5028	10.9 ± 0.51
		10 days	Total	7.1 ± 0.11,2	10.086 ± 0.0111	–	0.3008	≈12.0 ± 0.11,2
			Uninjured	7.1 ± 0.11	10.172 ± 0.0411	4.9 ± 0.52	0.4492	12.2 ± 0.52
		30 days	Total	7.5 ± 0.12	10.272 ± 0.1041,2	6.8 ± 0.1	0.2136	10.7 ± 0.11
			Uninjured	7.5 ± 0.21	10.434 ± 0.2961	6.6 ± 0.13	0.4272	10.9 ± 0.21
	Biofilms	0 days	Total	6.2 ± 0.11,2	11.403 ± 0.1601	2.6 ± 0.11	0.5000	13.6 ± 0.13
			Uninjured	5.9 ± 0.12,3	11.579 ± 0.1741	2.0 ± 0.21	0.5330	13.9 ± 0.22
		3 days	Total	6.5 ± 0.22	11.500 ± 1.7441	4.4 ± 0.14	0.4633	12.1 ± 0.21,2
			Uninjured	6.2 ± 0.33	21.324 ± 0.3501	3.5 ± 0.13	0.5145	22.7 ± 0.31
		10 days	Total	5.9 ± 0.21	20.815 ± 0.2311	4.1 ± 0.13	0.4524	11.8 ± 0.21
			Uninjured	5.7 ± 0.32	11.523 ± 1.1501	3.3 ± 0.22,3	0.5394	12.4 ± 0.41
		30 days	Total	6.2 ± 0.21,2	20.774 ± 0.1621	3.9 ± 0.12	0.4315	22.3 ± 0.22
			Uninjured	5.2 ± 0.31	10.739 ± 0.1851	3.0 ± 0.22	0.5150	22.2 ± 0.41

Inactivation parameters are determined for both the total and the uninjured population. ¹Effect cell mode: for each microorganism, PAL age and population type, parameters of the Geeraerd et al. (2000) model bearing different superscripts (no numbers in common) are significantly different (P ≤ 0.05). ²Effect PAL age: for each microorganism, cell mode population type, parameters of the Geeraerd et al. (2000) model bearing different superscripts (no number in common) are significantly different (P ≤ 0.05).