Application of modified chitosan in fresh keeping of fresh-cut kiwi fruits and fresh keeping method
A fresh-keeping method and kiwifruit technology, applied in the application, fruit and vegetable fresh-keeping, food preservation and other directions, can solve the problems of poor storage quality of fresh-cut kiwifruit, affecting consumer acceptance, and insignificant microbial biomass effect, and achieve the preservation of ascorbic acid and total total. Phenolic content, reduced microbial count and moisture loss, significant effect
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Embodiment 1
[0026] Take Hayward kiwifruit as an example, the following treatments are performed:
[0027] 1) Select kiwi fruit: select well-developed kiwi fruit without mechanical damage;
[0028] 2) Chemical sterilization: The selected fresh fruit is subjected to sodium hypochlorite sterilization treatment, the concentration of sodium hypochlorite solution used for sterilization is 20mL / L, the soaking time is 5min, and then rinsed with running water;
[0029] 3) After peeling with a stainless steel peeler, remove the head and tail;
[0030] 4) preparation of chitosan solution: with mass concentration being 0.5% glacial acetic acid solution as solvent, preparation mass concentration is 0.1%, 0.5%, 1% and 1.5% and 2% chitosan solution, and solution pH Adjust the value to 6;
[0031] 5) Preparation of CGC treatment solution: mix chitosan solutions with a mass concentration of 0.1%, 0.5%, 1%, 1.5% and 2% with a glucose solution with a mass concentration of 1% in a mass ratio of 1:1 , and ...
Embodiment 2
[0039] Take Hayward kiwifruit as an example, the following treatments are performed:
[0040] 1) Select kiwi fruit: select well-developed kiwi fruit without mechanical damage;
[0041] 2) Physical sterilization: the selected fresh fruit is subjected to sodium hypochlorite sterilization treatment, the concentration of sodium hypochlorite solution used for sterilization is 20mL / L, the soaking treatment time is 5min, and then rinsed with running water;
[0042] 3) 2) the treated kiwi fruit is peeled with a stainless steel peeler;
[0043] 4) Preparation of chitosan solution: using glacial acetic acid solution with a mass concentration of 0.5% as a solvent to prepare a chitosan solution with a mass concentration of 1%, and adjusting the pH value of the solution to 6;
[0044] 5) Preparation of CGC treatment solution: mix the chitosan solution with a mass concentration of 1% and the glucose solution with a mass concentration of 0.1%, 0.5%, 1.0%, 1.5% and 2% respectively in a mass ...
Embodiment 3
[0052] Take Hayward kiwifruit as an example, the following treatments are performed:
[0053] 1) select kiwi fruit: select well-developed kiwi fruit without mechanical damage;
[0054] 2) Physical sterilization: the selected fresh fruit is subjected to sodium hypochlorite sterilization treatment, the concentration of sodium hypochlorite solution used for sterilization is 20mL / L, the soaking treatment time is 5min, and then rinsed with running water;
[0055] 3) 2) the treated kiwi fruit is peeled with a stainless steel peeler;
[0056] 4) Preparation of chitosan solution: using glacial acetic acid solution with a mass concentration of 0.5% as a solvent to prepare a chitosan solution with a mass concentration of 1%, and adjusting the pH value of the solution to 6;
[0057] 5) Preparation of CGC treatment solution: mix 1% chitosan solution and 1.0% glucose solution evenly at a mass ratio of 1:3, and perform high pressure treatment at 121°C for 5min, 10min, 15min, 20min, 25min, ...
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