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. 2020 Mar 6;10:4243. doi: 10.1038/s41598-020-61293-8

Table 3.

Physicochemical parameters of tilapia (Oreochromis niloticus) fillets non- and treated with oxygen scavenger packaging (OSP) and ultraviolet radiation (UV-C) stored at 4 ± 1 °C for 23 days.

Parameters Treatments€ AUC¥ Linear regression coefficients
AUC¥0–13 AUC¥15–23 y-intercept slope p-value r-squared
Ammonia (µg NH3/g fish tissue) AP 129.80 ± 0.33a NA 7.44 ± 0.09 0.40 ± 0.01 <0.0001 0.981
OSP 117.90 ± 0.22c 90.33 ± 0.22b 7.65 ± 0.08 0.20 ± 0.01 <0.0001 0.970
AUV1 122.80 ± 0.33b 94.43 ± 0.20a 7.88 ± 0.11 0.21 ± 0.01 <0.0001 0.953
OSUV1 109.70 ± 0.19d 84.01 ± 0.16c 7.40 ± 0.04 0.16 ± 0.00 <0.0001 0.991
AUV3 122.90 ± 0.32b 94.47 ± 0.24a 7.88 ± 0.12 0.21 ± 0.01 <0.0001 0.949
OSUV3 109.80 ± 0.35d 84.16 ± 0.21c 7.40 ± 0.04 0.16 ± 0.00 <0.0001 0.991
TVB-N (mg TVB-N/100 g fish tissue) AP 216.50 ± 9.09a NA 11.98 ± 0.60 0.72 ± 0.09 <0.0001 0.788
OSP 178.50 ± 4.24c 152.60 ± 3.34b 10.60 ± 0.31 0.45 ± 0.02 <0.0001 0.923
AUV1 192.00 ± 4.94b 170.80 ± 3.04a 11.11 ± 0.35 0.54 ± 0.03 <0.0001 0.930
OSUV1 154.00 ± 7.20d 125.60 ± 3.76c 9.86 ± 0.20 0.31 ± 0.02 <0.0001 0.928
AUV3 191.70 ± 3.31b 171.10 ± 1.27a 11.08 ± 0.34 0.54 ± 0.03 <0.0001 0.932
OSUV3 154.20 ± 3.70d 125.70 ± 1.73c 9.87 ± 0.18 0.31 ± 0.01 <0.0001 0.942
Lipid oxidation (mg malonaldehyde/kg fish tissue) AP 19.46 ± 0.20c NA 0.03 ± 0.00 0.22 ± 0.00 <0.0001 0.963
OSP 9.84 ± 0.09d 20.91 ± 0.12c 0.09 ± 0.01 0.14 ± 0.01 <0.0001 0.960
AUV1 23.13 ± 0.18b 28.88 ± 0.14b 0.49 ± 0.01 0.17 ± 0.01 <0.0001 0.934
OSUV1 10.11 ± 0.11d 21.05 ± 0.20c 0.07 ± 0.00 0.14 ± 0.01 <0.0001 0.960
AUV3 27.99 ± 0.30a 32.70 ± 0.10a 0.76 ± 0.01 0.18 ± 0.01 <0.0001 0.928
OSUV3 10.36 ± 0.10d 21.07 ± 0.29c 0.04 ± 0.00 0.14 ± 0.01 <0.0001 0.963
Protein oxidation (nmol carbonyl/mg protein) AP 71.08 ± 1.67c NA 1.68 ± 0.16 0.58 ± 0.02 <0.0001 0.971
OSP 43.78 ± 1.36d 48.35 ± 0.83c 1.71 ± 0.12 0.23 ± 0.01 <0.0001 0.951
AUV1 88.09 ± 1.67b 97.15 ± 2.35b 3.60 ± 0.26 0.46 ± 0.02 <0.0001 0.944
OSUV1 44.04 ± 1.85d 48.78 ± 0.62c 1.74 ± 0.13 0.23 ± 0.01 <0.0001 0.948
AUV3 98.12 ± 2.65a 117.20 ± 4.80a 3.76 ± 0.29 0.58 ± 0.02 <0.0001 0.956
OSUV3 44.71 ± 2.55d 48.69 ± 1.10c 1.80 ± 0.14 0.23 ± 0.01 <0.0001 0.941

Results are expressed as means ± standard deviation (n = 2). a,b,c,dDifferent superscripts in the same column indicate significant differences (p < 0.05) among treatments. ¥AUC – Area under curve; AUC0-13 – from day 0 to 13 among treatments AP, OSP, AUV1, OSUV1, AUV3, and OSUV3; AUC15-23 – from day 15 to 23 among treatments OSP, AUV1, OSUV1, AUV3, and OSUV3. NA – Not applicable. €AP (air packaging); OSP (oxygen scavenger packaging); AUV1 (air packaging + UV-C at 0.102 J/cm2); OSUV1 (oxygen scavenger packaging + UV-C at 0.102 J/cm2); AUV3 (air packaging + UV-C at 0.301 J/cm2); and OSUV3 (oxygen scavenger packaging + UV-C at 0.301 J/cm2).