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A kind of fresh-keeping method of grape

A fresh-keeping method and grape technology, applied in horticultural methods, botanical equipment and methods, plant protection and other directions, can solve problems such as limited application and not easy to dissolve, reduce water loss rate and rot rate, reduce consumers and the environment The harm of phenolic substances, the effect of improving phenolic content and disease resistance

Active Publication Date: 2019-04-16
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chitosan is not easy to dissolve under neutral conditions, which greatly limits its application in many fields such as fruit storage.

Method used

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  • A kind of fresh-keeping method of grape
  • A kind of fresh-keeping method of grape
  • A kind of fresh-keeping method of grape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. How to keep grapes fresh

[0028] Specific steps are as follows:

[0029] (1) Dissolve solid chlorine dioxide (food grade) in deionized water to obtain a final concentration of 50 mg L -1 Chlorine dioxide solution;

[0030] (2) 15g of food grade, chitosan with deacetylation ≥ 95%, viscosity ≤ 30mPa is dissolved in a mixed solution of 1% acetic acid and 1% glycerin by volume in 1L, and stirred overnight at room temperature ;Centrifuge at 5,000×g for 10 minutes to remove impurities in the mixed solution, adjust the pH to 5.6 with sodium hydroxide, and sterilize at 121°C for 15 minutes before use;

[0031] (3) Add chitosan and salicylic acid successively in the reactor, the mass ratio of the two is 1:0.35, and stir the reaction for 60min under the condition of 60±2°C, then transfer the reactant to the Soxhlet extractor, Use 60mL-70mL of ethanol to reflux and extract until free salicylic acid is not contained, and obtain a white solid powder CTS-g-SA with a grafting r...

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Abstract

The invention discloses an antistaling method for grape. The method comprises the following steps: before the grape is picked, spraying grape clusters with a ClO2 solution; and after the surfaces of the grape clusters are dried, spraying a CTS-g-SA solution. According to the invention, before the grape is picked, the ClO2 solution and the CTS-g-SA solution are sprayed to the grape, so the content of phenolic substances and disease resistance of grape fruits are better improved through the combination of spraying two solutions, and the water loss rate and the rot rate of the grape are reduced. The method provided by the invention can preserve the grape without application of sulfur dioxide, so the harm of sulfur dioxide to consumers and the environment is reduced.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping of fruits and vegetables, in particular to a fresh-keeping method of grapes. Background technique [0002] Grape is a kind of highly perishable and non-climate fruit. After harvest, it is very easy to lose water, brown, reduce the firmness of the pulp, threshing and fungal rot. The above-mentioned quality changes after harvest are mainly caused by pathogenic fungi, including botrytis cinerea (greymould) and penicillium (green mould), which are the main pathogens that affect the quality and safety, shelf life and market value of grapes after harvest. [0003] In China and abroad, low-temperature combined sulfur dioxide (SO 2 ) to fumigate and store grapes. However, due to SO 2 Toxicity to plants, emergence of resistant strains and SO 2 The impact of residues on human health and the environment, the application of sulfur dioxide in grape preservation is increasingly restricted. [0004] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G7/06A01G13/00A23B7/04
CPCA01G7/06A01G13/00A23B7/04
Inventor 杨虎清申燕飞吴玲艳厉维江
Owner ZHEJIANG FORESTRY UNIVERSITY
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