Table 2. Total phenolics content and antioxidant activities of CO₂- and/or ClO₂-treated tomatoes according to storage conditions

	0 day	Cold storage (4°C)			Room temperature storage (20°C)
	0 day	7 days	14 days	14+3 days	3 days	7 days	13 days
Total phenolics (mg/100 g DW)
Control	327.79±4.37¹⁾^D²⁾^a³⁾	386.62±14.56^Ba	349.42±9.49^CDa	420.45±14.00^Aa	335.00±5.85^Da	383.77±8.97^BCa	375.19±14.03^BCb
30% CO₂	341.23±10.49^BCa	325.71±10.19^Cb	324.09±19.75^Ca	361.69±11.87^ABCb	321.75±6.33^Ca	387.53±12.21^Aa	377.86±18.57^Abb
60% CO₂	324.81±9.68^Ca	335.26±6.14^Cb	350.00±4.08^BCa	368.05±0.28^Bb	349.42±9.04^BCa	361.36±11.06^Ba	431.36±9.59^Aa
30% CO₂+ 10ppm ClO₂	322.66±6.86^Ca	347.53±9.74^BCb	352.60±2.43^Bca	370.78±22.54^ABCb	345.06±17.80^BCa	414.09±25.38^Aa	382.01±15.41^ABb
DPPH radical scavenging (μmol/g DW)
Control	18.80±1.07^BCa	20.68±0.54^ABa	18.61±0.39^BCa	21.67±0.79^Aa	17.42±0.43^Ca	19.79±0.43^ABab	19.71±0.84^ABb
30% CO₂	17.99±0.50^BCDa	18.10±0.49^BCDb	16.20±0.32^Db	17.44±1.33^CDb	19.11±0.46^ABCa	20.91±0.64^Aa	20.19±1.19^ABb
60% CO₂	18.07±0.33^Ba	18.19±0.11^Bb	18.39±0.33^Ba	18.87±0.75^Bab	17.35±0.68^Ba	18.81±0.62^Bb	24.08±0.35^Aa
30% CO₂+ 10ppm ClO₂	16.72±0.18^Ca	19.29±0.49^Bab	17.09±0.09^Cb	19.20±0.60^Bab	18.22±1.00^BCa	21.39±0.62^Aa	22.17±0.53^Aab
ABTS⁺ radical scavenging (μmol/g DW)
Control	16.77±0.78^Da	19.23±0.68^ABCa	18.20±0.57^CDa	21.01±0.76^Aa	17.11±0.31^Da	18.99±0.42^BCb	20.06±0.12^ABb
30% CO₂	15.01±0.49^Cab	16.90±0.47^Bb	15.77±0.64^BCb	17.10±0.87^Bb	17.36±0.31^Ba	19.36±0.60^Aab	20.37±0.43^Ab
60% CO₂	15.33±0.39^Dab	16.75±0.19^CDb	18.14±0.53^BCa	18.58±0.83^Bab	17.04±0.58^Ca	18.98±0.16^Bb	22.92±0.31^Aa
30% CO₂+ 10ppm ClO₂	14.72±0.29^Eb	18.44±0.53^BCab	16.37±0.15^Db	19.12±0.53^Bab	17.49±0.48^CDa	20.92±0.80^Aa	20.93±0.42^Ab

Results are mean values±SD from three measurements (n=3).
Means followed by the same uppercase letter horizontally for each parameter do not differ significantly by Duncan’s multiple range test at p<0.05.
Means followed by the same lowercase letter vertically for each parameter do not differ significantly by Duncan’s multiple range test at p<0.05.