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| Peptide Characteristics and Antioxidant Properties of Nuodeng Hams of Different Ages |
| LUO Yuting1,2, WU Baosen1,2, GU Dahai1,2, XU Zhiqiang1,2, WANG Guiying1,2, WANG Xuefeng1,2, FAN Jiangping1,2, PU Yuehong1,2, WANG Shanrong3,*, LIAO Guozhou2,* |
| 1.College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China; 2.Livestock Product Processing Engineering and Technology Research Center of Yunnan Province, Kunming 650201, China; 3.Yunnan Rural Leader College, Yunnan Agricultural University, Kunming 650201, China |
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Abstract This study determined the peptide content, average peptide chain length (APCL), molecular mass distribution and free amino acid content of crude peptides extracted from Nuodeng hams of different ages. Additionally, the inhibitory effect of the extracted peptides on protein and lipid oxidation was evaluated. The results obtained showed that crude peptides were significantly more abundant in 2-year-old ham than in those of two other ages (P < 0.05). No significant differences in the APCL and average molecular mass of crude peptides from one-, two- and three-year-old ham samples (P > 0.05). The contents of various free amino acids in crude peptides from one- and two-year-old hams was significantly increased as compared to the older one (P < 0.05 ). The percentage inhibition of lipid oxidation after 144 h incubation in the presence of crude peptides from one-, two- and three-year-old ham samples reached 77.95%, 76.79% and 75.45%, respectively, with a highly significant difference being observed compared with that (64.32%) obtained with glutataione (GSH) (P < 0.01). Crude peptides from one- and two-year-old hams had a significantly stronger capacity to inhibit protein oxidation that those from three-year-old ham (P < 0.01).
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2017, Vol. 31 
