Table 2 Change in pH of beef dur ing storage

Treatment1)	Storage period (day)
	0	1	2	3	4	7	9	11
	Control	5.25±0.02c2)A3)	5.51±0.04bA	5.51±0.03bA	5.71±0.12aA	-	-	-	-
TCS-1	5.25±0.02cA	-	5.40±0.02bA	-	5.34±0.04bB	5.51±0.03aB	5.53±0.04a	5.52±0.04a
TCS-2	5.25±0.02cA	-	5.41±0.06bA	-	5.42±0.06bA	5.70±0.07aA	5.71±0.07a	-

Control, beef in expandable polystyrene box; TCS-1, beef in box with thermoelectric cooling system and plasma generation apparatus; TCS-2, beef in box with thermoelectric cooling system.
^a-bMeans in the same row with different superscripts are significantly different (p<0.05).
^A-BMeans in the same column with different superscripts are significantly different (p<0.05).