Method for keeping cordyceps sinensis fresh through recombination of modified atmosphere packaging and ultraviolet irradiation

A technology for Cordyceps sinensis and modified atmosphere packaging, which is applied in the field of modified atmosphere packaging and ultraviolet irradiation composite fresh-keeping Cordyceps sinensis, to achieve better color and fragrance retention effect, and the effect of inhibiting the reduction of weight loss rate.

Inactive Publication Date: 2019-05-07
CHINA ACAD OF SCI NORTHWEST HIGHLAND BIOLOGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the application of UV-C irradiation technology to effectively preserve the animal-plant complex of Cordyceps sinensis

Method used

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  • Method for keeping cordyceps sinensis fresh through recombination of modified atmosphere packaging and ultraviolet irradiation

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preparation example Construction

[0068] In the present invention, the chitosan-glucose complex plays the role of forming a protective film with functions such as antibacterial, anti-oxidation, and respiration inhibition in the coating solution. In the present invention, the preparation method of described chitosan glucose complex preferably comprises the following steps:

[0069] A1, dissolving chitosan and glucose in glacial acetic acid, is mixed with the glacial acetic acid solution containing volume concentration 0.5~2% chitosan and volume concentration 0.5~2% glucose;

[0070] A2, will contain the glacial acetic acid solution of volume concentration 0.5~2% chitosan and volume concentration 0.5~2% glucose at 103.4KPa, 121.3 ℃ (1.05kg / cm 2 ) under the condition of reacting for 15 to 20 minutes, and freeze-drying to obtain the chitosan-glucose complex.

[0071] In the present invention, in the step A1, the preferably formulated glacial acetic acid solution contains chitosan at a volume concentration of 1-1....

Embodiment 1

[0083] Preservative solution was prepared: 1 mmol / L sorbitol, 1 mmol / L iso-Vc, 6 μmol / L phytic acid, and the concentration of L-cysteine ​​was 0.4 mg / kg.

[0084] Preparation of the ethanol extract of the Cordyceps sinensis fermentation liquid: inoculate the Cordyceps sinensis strain into PDA (potato-glucose-agar) liquid fermentation medium after activation, culture at 26°C for 7 days, centrifuge to take the supernatant, and obtain the Cordyceps sinensis fermentation liquid Adding ethanol to the Cordyceps sinensis fermentation liquid until the ethanol volume percent concentration is 75%, centrifuging to collect the supernatant, decompressing distillation to remove the ethanol in the supernatant, and freeze-drying to obtain the ethanol extract of the Cordyceps sinensis fermentation liquid.

[0085] The preparation of chitosan-glucose complex: configuration mass percent concentration 1% chitosan, the glacial acetic acid mixed solution of mass percent concentration 1% glucose, und...

Embodiment 2

[0091] Preservative solution was prepared: 3mmol / L sorbitol, 3mmol / LVc, 9μmol / L phytic acid, and the concentration of L-cysteine ​​was 0.8mg / kg.

[0092] Preparation of the ethanol extract of the Cordyceps sinensis fermentation liquid: inoculate the Cordyceps sinensis strain into PDA (potato-glucose-agar) liquid fermentation medium after activation, culture at 24°C for 7 days, centrifuge to take the supernatant, and obtain the Cordyceps sinensis fermentation liquid Adding ethanol to the Cordyceps sinensis fermentation liquid until the ethanol volume percentage concentration is 70%, stopping, centrifuging to collect the supernatant, decompressing distillation to remove the ethanol in the supernatant, and freeze-drying to obtain the ethanol extract of the Cordyceps sinensis fermentation liquid.

[0093] The preparation of chitosan-glucose complex: configuration mass percent concentration 1% chitosan, the glacial acetic acid mixed solution of mass percent concentration 1% glucose,...

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Abstract

The invention provides a method for keeping cordyceps sinensis fresh through the recombination of modified atmosphere packaging and ultraviolet irradiation, and relates to the technical field of cordyceps sinensis fresh-keeping. The method includes soaking fresh cordyceps sinensis in a fresh-keeping solution; taking out the cordyceps sinensis to soak in a tectorial membrane liquid after drying; forming a layer of protective membrane on the surfaces of the cordyceps sinensis; and performing ultraviolet irradiation on the coated cordyceps sinensis after modified atmosphere packaging so that thefresh-keeping of the cordyceps sinensis can be realized. Through the adoption of a comprehensive processing mode of fresh-keeping with the fresh-keeping solution, coating with the tectorial membrane liquid, modified atmosphere packaging and ultraviolet irradiation, the reduction of weight loss rates of the cordyceps sinensis can be significantly inhibited, the reduction of soluble protein contentcan be alleviated, and the increasing of the activity of polyphenoloxidase can be delayed; and compared with conventional fresh-keeping methods, the fresh-keeping time at least can reach 75 d; so thatbetter effects of maintaining the color and fragrance of the fresh cordyceps sinensis can be achieved.

Description

technical field [0001] The invention relates to the technical field of preservation of Cordyceps sinensis, in particular to a method for composite preservation of Cordyceps sinensis by modified atmosphere packaging and ultraviolet irradiation. Background technique [0002] Cordyceps sinensis is a high-grade nourishing and precious Chinese medicinal material, which contains a variety of nutrients and active ingredients, including nucleosides, polysaccharides, sterols, fatty acids, proteins, peptides and volatile components, etc. It has anti-tumor, immune system regulation, and promotes body cell damage Repair, anti-free radicals, anti-oxidation, anti-aging, protect cardiac muscle and vascular cells, improve cardiovascular function, protect the liver, protect the kidneys, regulate the respiratory system, regulate the blood system and regulate blood lipids and other functions. [0003] Most of the Cordyceps currently on the market are dried Cordyceps. During the drying process ...

Claims

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Application Information

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IPC IPC(8): A23L3/3418A23L3/28A23L3/3562A23L3/3544A23L3/3508A23L3/3535A23L3/3463
CPCY02A40/90
Inventor 毕宏涛魏立新肖远灿杜玉枝杨红霞
Owner CHINA ACAD OF SCI NORTHWEST HIGHLAND BIOLOGY INST
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