Effect of Different Preservatives on Quality of Embryo of Dictyophora
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Abstract:
In this wok, the effects of different preservative treatments on the preservation of fresh embryo of Dictyophora during storage were studied. The embryo of Dictyophora were coated with different concentrations of chitosan, carrageenan and ascorbic acid as coating agents. The distilled water was used as a control. After packaging with PE fresh-keeping bags, they were stored at 4 ℃ to study the storage of embryo of Dictyophora. The weight loss rate, color difference, soluble protein content, free amino acid content, and polyphenol oxidase activity were analyzed. The results showed that the optimal treatment concentration of each preservative was as follows: 1.2% chitosan, 0.1% carrageenan and 0.1% ascorbic acid. All three preservatives could reduce the weight loss rate, PPO activity and PPO activity peak. Delayed appearance of 4 d, chitosan and carrageenan treatment had a certain effect on inhibiting protein decomposition into free amino acids. Ascorbic acid treatment could better maintain the color of embryo of Dictyophora and maintain soluble protein content. The preservation effects of three kinds of preservatives on embryo of Dictyophora were evaluated. The 0.1% concentration ascorbic acid had the best preservation effect. After the storage, the weight loss rate was 0.64%, the whiteness value was 50.73, the soluble protein content was 3.05 mg/g, and the free amino acid content was 327.73 mg/100 g. The PPO activity was 1.86 ΔOD420/min·g, which was superior to the control group.
