A multi-layer coating film preservation method for inhibiting lignification of fruits and vegetables

Abstract

The invention relates to a method for preventing the lignification of fruits and vegetables by multi-layer coating film preservation, and belongs to the technical field of fruit preservation. Mix hemicellulose, glucomannan, soybean protein isolate, and xanthan gum evenly to form a film-forming matrix, then mix the film-forming matrix with water, add glycerol and / or potassium sorbate, and cool to room temperature for later use. Membrane solution A; immerse the fruits and vegetables in the prepared membrane solution A for 30 seconds to 2 minutes, blow dry with cold wind or dry at room temperature; add salicylic acid, spermidine and spermine to the membrane solution A and mix evenly to obtain the membrane solution B, Immerse the treated fruits and vegetables in membrane solution B for 30 seconds to 2 minutes, and dry them with cold wind or at room temperature; add bacteriostatic agent natamycin or ε-polylysine to chitosan solution to obtain membrane solution C, Soak the treated fruits and vegetables in the film solution C for 30s to 2 minutes, and dry them with cold wind or at room temperature. The method effectively suppresses the production speed of the fruit and vegetable lignin through the fresh-keeping treatment of the multi-layer coating film.

Description

technical field [0001] The invention relates to a method for preventing the lignification of fruits and vegetables by multi-layer coating film preservation, and belongs to the technical field of fruit preservation. Background technique [0002] At present, the commonly used fresh-keeping methods for fruits include low temperature, controlled atmosphere, and chemical preservatives. Low-temperature preservation is a fresh-keeping method of placing fruits and vegetables in cold storage, and it is also one of the most effective and widely used physical preservation techniques at present. Low temperature can reduce the activity of certain enzymes, reduce the respiratory intensity and physiological metabolism of fruits and vegetables, delay aging, and inhibit browning. However, for cold-sensitive fruits such as loquat, it will intensify its lignification, so that the hardness will increase, the water will be seriously lost, the juice yield will be reduced, and the taste of the fr...

AI Technical Summary

Problems solved by technology

[0005] Based on the above-mentioned problems, it is necessary to provide a new fresh-keeping method, which uses safe, non-toxic, and degradable coatings to apply multi-layer coatings to fruits and vegetables to solve the problem of low temperature conditions for fruits and vegetables such as loquats, mangosteens, and kiwis. , due to the intensification of lignification, the juice yield is reduced, thereby increasing the water content of fruits and vegetables during the preservation period of fruits and vegetables

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