Table 4. Changes in the length of PI at each step of treatment

Samples	Treatment steps (mm)					Remarks
Samples	Before treatment	Soaking	Boiling	Freezing drying	Rehydration	Overall length change
PI1¹⁾	10.00^a	24.77±3.81^ax	24.16±3.81^bx	21.97±4.73^bx	15.63±1.69^bx	5.63±1.69^x
PI2	10.00^a	25.90±2.37^abx	25.31±2.39^abx	23.64±1.65^abx	21.02±3.76^bxy	10.96±3.76^xy
PI3	10.00^a	42.15±6.67^by	41.23±6.60^cy	37.35±6.43^cy	26.29±5.54^cy	16.29±5.54^y

PI1, distilled water; PI2, 2% citric acid; PI3, 2% sodium pyrophosphate.
Means on the same row with different letters are significantly different (p<0.05).
Means on the same column with different letters are significantly different (p<0.05).
PI, porcine intestine.