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. 2010 Sep 3;76(21):6982–6990. doi: 10.1128/AEM.00900-10

TABLE 2.

Resistance parameters corresponding to survival curves under HHP for the eight strains studieda

Growth conditions and strain μ (min−1) S for μ (min−1) lag (min) S for lag (min) Yf/Yo (log CFU) S for Yf/Yo (log CFU) r2
Stationary GP, nonselective RM, aerobic RA
    CECT 976 0.117a 0.023 17.45A 3.583 −3.133α 0.333 0.97
    CECT 4459 0.151a 0.013 21.89A 1.420 −3.833β 0.113 0.99
    CECT 4465 0.158a 0.015 0.790B* 1.360 −4.905γ 0.032 0.99
    CECT 4466 0.143a 0.008 21.12A 0.970 −4.355δ 0.134 0.98
    CECT 435 0.158a 0.011 1.319B 0.525 −4.889γ 0.230 0.98
    CECT 4630 0.144a 0.017 3.184B* 1.473 −4.677δ,γ 0.122 0.99
    Newman 0.120a 0.013 21.36A 2.317 −3.482α,β 0.315 0.99
    Newman ΔsigB 0.113a 0.026 5.975B,C* 3.529 −3.605α,β 0.039 0.97
Exponential GP, nonselective RM, aerobic RA
    CECT 976 0.254b 0.034 2.771B* 1.274 — — 0.97
    CECT 4459 0.338b 0.058 4.526B,C* 1.899 — — 0.97
    CECT 4465 0.296b 0.017 <0.001B* <0.001 — — 0.98
    CECT 4466 0.292b 0.057 3.241B,C* 2.819 — — 0.99
    CECT 435 0.288b 0.005 0.317B* 0.390 — — 0.97
    CECT 4630 0.246b 0.048 1.192B* 2.065 — — 0.97
    Newman 0.360b 0.050 4.513B,C* 3.924 — — 0.95
    Newman ΔsigB 0.335b 0.064 3.327B,C* 2.912 — — 0.99
Stationary GP, selective RM, aerobic RA
    CECT 4459 0.254b 0.091 6.757C 1.064 −4.503δ 0.072 0.99
    CECT 4465 0.462c 0.016 <0.001B* <0.001 −5.487ɛ 0.130 0.98
    Newman 0.252b 0.091 6.735C 1.057 −4.517δ 0.053 0.99
    Newman ΔsigB 0.316b 0.056 0.603B* 0.889 −4.445δ 0.120 0.98
Stationary GP, nonselective RM, anaerobic RA
    CECT 4459 0.065d 0.013 19.14A 4.743 — — 0.95
    CECT 4465 0.073d 0.003 2.243B* 2.176 — — 0.94
    Newman 0.057d 0.021 17.48A 2.374 — — 0.98
    Newman ΔsigB 0.073d 0.001 9.630C 2.874 — — 0.96
a

The table also includes the standard deviations (S) of the values and the coefficients of determination of the fittings (r2). Conditions were as follows: treatment pressure, 450 MPa; initial temperature, 25°C; treatment medium, citrate-phosphate buffer pH 7.0; initial cell concentrations, 2 × 108 to 6 × 108 cells/ml for stationary-growth-phase cells and 8 ×107 cells/ml for exponential-growth-phase cells. GP, growth phase; RM, recovery medium; RA, recovery atmosphere. Values with the same superscripts did not show statistically significant differences (P > 0.05). *, the values were not significantly different (P < 0.05) from 0 (one-sample t test); —, parameter could not be calculated.