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Composite preservation method for prolonging preservation period of fresh chestnut kernels

A fresh chestnut kernel and composite fresh-keeping technology, which is applied in the direction of edible seed preservation, food preservation, and seed preservation with a coating protective layer, can solve the problems of less fresh chestnuts and different structures in silicon window modified atmosphere packaging, and achieve low cost , improve quality and prolong shelf life

Inactive Publication Date: 2012-07-11
INST OF AGRO FOOD SCI & TECH SHANDONG ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the preservation of chestnuts in modified atmosphere packaging with silicon windows. Only Pan Chaoran of Fujian Agriculture and Forestry University "Research on the Storage of Chestnuts in Low-temperature Silicon Window Modified Atmosphere Storage" (Journal of Agricultural Machinery, 2006) studied the storage temperature (1°C, 5°C, 15℃) and packaging methods (silicon window bag packaging, sack packaging) on ​​the respiration intensity, nutritional components and fresh-keeping effect of chestnut fruit during storage
However, there is no relevant report on the storage of chestnuts. The composition and structure of Chinese chestnuts are different from Chinese chestnuts. Therefore, the storage conditions of Chinese chestnuts have no direct reference to the storage of Chinese chestnuts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Clean the fresh chestnuts after picking, remove the outer skin and inner skin of the chestnuts to obtain chestnut kernels; it can be peeled by machine or manually; it can be cleaned on a chestnut cleaning machine. Grading;

[0022] (2) Coating film: add 0.05% Vc to 1.5% chitosan solution to obtain a film coating agent, soak chestnut kernels in the film coating agent for 60 seconds, and dry in the air;

[0023] (3) Modified atmosphere packaging with silicon window: Use polyethylene plastic packaging box with silicon window (length: 19cm, width: 13cm, height: 4cm, thickness: 0.3mm) to package the coated chestnut kernels, pack them into The amount is 150g, and the ratio of silicon window area to chestnut kernel mass is 8cm 2 / kg, at a temperature of 20°C and a relative humidity of 90%, the O of the silicone rubber membrane 2 Transmittance 4.58×10 -9 mol s -1 m -2 Pa -1 ;CO 2 The transmittance is 24.24×10 -9 mol s -1 m -2 Pa -1 , O in the initial gas 2 T...

Embodiment 2

[0025] (1) Clean the refrigerated chestnuts, remove the skin and inner skin of the chestnuts to obtain chestnut kernels; it can be machine peeled or manually peeled; it can be cleaned on a chestnut washing machine, and in order to keep the chestnuts uniform in size, they can be graded by a classifier;

[0026] (2) Coating film: add 0.08% Vc to 1.5% chitosan solution to obtain a film coating agent, soak chestnut kernels in the film coating agent for 60 seconds, and dry in the air;

[0027] (3) Modified atmosphere packaging with silicon window: polystyrene plastic bag inlaid with silicon window (area: 25×35cm 2 ) to package chestnut kernels coated with film, the filling amount of chestnut kernels is based on the holding capacity of the plastic bag, and the ratio of the silicon window area to the mass of chestnut kernels is 10cm 2 / kg, at a temperature of 20°C and a relative humidity of 90%, the O of the silicone rubber membrane 2 Transmittance 4.58×10 -9 mol s -1 m -2 Pa-1...

Embodiment 3

[0029] (1) Clean the refrigerated chestnuts, remove the skin and inner skin of the chestnuts to obtain chestnut kernels; it can be machine peeled or manually peeled; it can be cleaned on a chestnut washing machine, and in order to keep the chestnuts uniform in size, they can be graded by a classifier;

[0030] (2) Coating film: add 0.1% citric acid browning agent to 1.5% chitosan solution to obtain a film coating agent, soak chestnut kernels in the film coating agent for 60 seconds, and dry in the air;

[0031] (3) Modified atmosphere packaging with silicon window: use polyethylene plastic bag inlaid with silicon window (area: 20×30cm 2 ) to package chestnut kernels coated with film, the filling amount of chestnut kernels is based on the capacity of the plastic bag, and the ratio of the silicon window area to the mass of chestnut kernels is 7cm 2 / kg, at a temperature of 20°C and a relative humidity of 90%, the O of the silicone rubber membrane 2 Transmittance 4.58×10 -9 mo...

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Abstract

The invention relates to a composite preservation method for prolonging the preservation period of fresh chestnut kernels, which belongs to the technical field of fruit and vegetable preservation and storage. The composite preservation method includes the following steps: washing and shelling the chestnuts; coating; and carrying out silicon window-modified atmosphere packaging: the ratio of the area of a silicon window to the weight of the chestnut kernels is 6 cm2 to 10 cm2, the content of O2 in initial gas is 5 to 7 percent in volume, the content of CO2 in the initial gas is 3 to 5 percent in volume, the rest is nitrogen, and a film is sealed by heat outside. The adoption of coating preservation combined with silicon window-modified atmosphere packaging solves the problem that raw chestnuts cannot be easily shelled, so that consumers can save time and labor and more conveniently eat chestnuts; meanwhile, the preservation period of the product is greatly prolonged, and the quality of chestnut kernels is improved; and compared with modified atmosphere packaging, and the equipment investment and production cost of the modified atmosphere packaging are high, the composite preservation method has the advantages of low equipment investment and low cost, and being simple and easy to carry out.

Description

technical field [0001] The invention belongs to the technical field of fresh-keeping and storage of fruits and vegetables, in particular to a composite fresh-keeping method for prolonging the fresh-keeping period of fresh chestnut kernels. Background technique [0002] Chestnut (Chestnut) belongs to the Fagaceae ( Fagaceae ) Chestnut is a nut plant, rich in nutrition, and has the reputation of "the king of dried fruits". It contains about 45%~65% starch, 5.7~10.7% protein, 2~7.4% fat, and carotene, vitamin A, B, C and calcium, phosphorus, potassium and other minerals can benefit qi and blood, nourish the stomach, nourish the kidney, strengthen the liver and spleen; raw food also has the effect of treating sore waist and legs, relaxing tendons and activating collaterals. [0003] Shelling and declothing is one of the main problems encountered in the process of chestnut processing. In the family, it is often necessary to open the shell with the help of a small knife. Excessi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B9/14A23B9/20
Inventor 弓志青王文亮程安玮靳琼潘运国
Owner INST OF AGRO FOOD SCI & TECH SHANDONG ACAD OF AGRI SCI
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