Table 9. Polyamine (mean±SD mg/kg, as-fed basis) and peroxide content (meq/kg, as-fed basis) of the two diets (MDM = Mechanically Deboned Chicken Meat diet and MBP = Meat By-Products diet) at the start and the end of the conservation period.

Diet	MDM		MBP		Diet	Time	Diet x Time
Time (month)	0	6	0	6	P	P	P
Putrescine	56.9±2.3	94.5±14.2	58.3±3.7	74.2±11.2	0.137	0.001	0.092
Cadaverine	88.4±3.9	112.9±17.1	89.8±6.3	87.4±13.3	0.187	0.306	0.139
Tryptamine	n.d.1	15.7±2.5	n.d.	n.d.	-	-	-
Phenylethylamine	4.3±0.5	7.1±1.3	3.9±1.0	4.2±1.0	0.032	0.047	0.088
Spermidine	18.1±2.5	19.6±3.0	25.4±2.8	18.6±2.9	0.055	0.171	0.055
Spermine	7.3±2.1	3.5±0.6	13.8±5.4	2.1±0.5	0.101	0.013	0.034
Histamine	10.3±0.6	28.5±4.4	7.7±0.3	16.7±2.6	0.002	0.001	0.126
Tyramine	52.9±2.6	93.7±14.3	36.5±3.6	67.3±10.3	0.003	0.001	0.310
Peroxide value	1.9±0.2	6.0±0.8	2.5±0.4	6.0±0.8	0.213	0.001	0.709

¹ n.d. = not detected.