Method for keeping cordyceps sinensis fresh through modified atmosphere packaging containing argon

A technology of cordyceps sinensis and modified atmosphere packaging, which is applied in the field of preservation of cordyceps sinensis to achieve the effect of slowing down the decline of soluble protein content, maintaining better color and fragrance, and inhibiting the decline 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

So far, there has been no report on using inert gas to preserve the animal-plant complex of Cordyceps sinensis under modified atmosphere

Method used

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  • Method for keeping cordyceps sinensis fresh through modified atmosphere packaging containing argon

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preparation example Construction

[0065] 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:

[0066] 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;

[0067] 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.

[0068] 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

[0078] 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.

[0079] Preparation of the ethanol extract of the Cordyceps sinensis fermentation liquid: inoculate the Cordyceps sinensis strain into a liquid fermentation medium (including potatoes, soybeans, sucrose, glucose, peptone, yeast extract, mineral salts and vitamins) after activation, and cultivate at 26°C for 7 days. Take the supernatant by centrifugation to obtain the Cordyceps fermented liquid; add ethanol to the Cordyceps fermented liquid until the volume percent concentration of ethanol is 75%, stop, collect the supernatant by centrifugation, distill under reduced pressure to remove the ethanol in the supernatant, freeze-dry , to obtain the ethanol extract of Cordyceps sinensis fermentation broth.

[0080] The preparation of chitosan-glucose complex: configuration mass percent concentration 1% chitosan, the glacial acetic ...

Embodiment 2

[0086] Preservative solution was prepared: 3mmol / L sorbitol, 3mmol / LVc, 9μmol / L phytic acid, and the concentration of L-cysteine ​​was 0.8mg / kg.

[0087] Preparation of the ethanol extract of the Cordyceps sinensis fermentation liquid: inoculate the Cordyceps sinensis strain into a liquid fermentation medium (including potatoes, soybeans, sucrose, glucose, peptone, yeast extract, mineral salts and vitamins) after activation, and cultivate at 25°C for 7 days. Take the supernatant by centrifugation to obtain the Cordyceps fermented liquid; add ethanol to the Cordyceps fermented liquid until the volume percentage concentration of ethanol is 70%, stop, collect the supernatant by centrifugation, distill under reduced pressure to remove the ethanol in the supernatant, freeze-dry , to obtain the ethanol extract of Cordyceps sinensis fermentation broth.

[0088] The preparation of chitosan-glucose complex: configuration mass percent concentration 1% chitosan, the glacial acetic acid m...

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Abstract

The invention provides a method for keeping cordyceps sinensis fresh through modified atmosphere packaging containing argon, and relates to the technical field of cordyceps sinensis fresh-keeping. Themethod 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 modified atmosphere packaging on the coated cordyceps sinensis with a mixed gas containing argon so that the fresh-keeping of the cordyceps sinensis can be realized. Modified atmosphere packaging can be performed by utilizing the mixed gas containing the argon, so that the reduction of weight loss rate of the cordyceps sinensis can besignificantly inhibited, the decreasing of soluble protein content can be slowed down, the increasing of moisture activity can be delayed, and the increasing of polyphenol oxidase activity can be delayed as well; and compared with conventional fresh-keeping methods, the fresh-keeping time at least can reach 75 d, and better 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 preserving freshness of Cordyceps sinensis through modified atmosphere packaging containing argon. 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 of Cordy...

Claims

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Application Information

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IPC IPC(8): A23L3/3445A23L3/3562A23L3/3544A23L3/3508A23L3/3535A23L3/3463
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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