Liquid nitrogen combined liquid carbon dioxide quick-frozen and fresh-keeping method for fresh cordyceps sinensis

A liquid carbon dioxide, Cordyceps sinensis technology, applied in food preservation, climate change adaptation, food science and other directions, can solve the problems of decreased freshness of Cordyceps sinensis, low polyphenol oxidase activity, and high soluble protein content, and is suitable for long-term preservation and more Effects of low phenol oxidase activity and high soluble protein content

Active 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

The method provided by the invention can solve the problem that the freshness of Cordyceps sinensis decreases in the preservation process, the weight loss rate is low, the soluble protein content is high and the activity of polyphenol oxidase is low

Method used

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  • Liquid nitrogen combined liquid carbon dioxide quick-frozen and fresh-keeping method for fresh cordyceps sinensis
  • Liquid nitrogen combined liquid carbon dioxide quick-frozen and fresh-keeping method for fresh cordyceps sinensis

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preparation example Construction

[0049] After obtaining the quick-frozen Cordyceps sinensis, the present invention sprays a preservative on the quick-frozen Cordyceps sinensis; the preservative includes 30-100 mg / mL Cordyceps mycelium extract, 50-200 mg / L chitosan oligosaccharide, 100-200 mg / L Antimicrobial Peptides and Water. In the present invention, the function of the fresh-keeping agent is to inhibit the growth of bacteria on the surface of the sample and prevent the sample from spoiling during the fresh-keeping process. The antistaling agent of the present invention preferably includes 50-70 mg / mL of Cordyceps mycelium extract. In the present invention, the function of the Cordyceps mycelium extract is an antibacterial antistaling agent, which inhibits the growth of bacteria during the preservation process. In the present invention, the Cordyceps mycelium extract includes guanine, cordycepin, hypoxanthine, cytidine, xanthine and adenosine. In the present invention, the preparation method of the Cordyc...

Embodiment 1

[0058] (1) Washing with running water: Clean the head, sporocarpus and worm body of the Cordyceps sinensis with soil collected from the place of production with linear running water at a temperature of 0°C.

[0059] (2) Ultrasonic cleaning: place the cleaned Cordyceps sinensis in a 0.1% calcium lactate solution, ultrasonically clean 5 times (power 250W, frequency 40k Hz, temperature 0°C, time 5min / time), drain .

[0060] (3) Soaking: Soak in cryoprotectant for 2 minutes, cryoprotectant: 0.3mol / L propylene glycol, 1mmol / L sorbitol, 1mmol / L Vc, 6μmol / L phytic acid, L-cysteine ​​at a concentration of 0.4mg / kg.

[0061] (4) Quick-freezing: Use a liquid nitrogen tunnel quick-freezing machine, the temperature of the freezing room is -120°C, spray liquid nitrogen and acetic acid / citric acid mist liquid into the freezing room, control the pH value of the freezing room to 4, and keep the material from entering and exiting for 5 minutes. When the material is exported, it is continuou...

Embodiment 2

[0066] (1) Cleaning with running water: Clean the head, sporocarpus and worm bodies of the Cordyceps sinensis with soil collected in the production area sequentially with linear running water at a temperature of 10°C.

[0067] (2) Ultrasonic cleaning: the cleaned Cordyceps sinensis is placed in a 0.5% calcium lactate solution, ultrasonically cleaned once (power 1200W, frequency 120Hz, temperature 10°C, time 10min / time), and drained.

[0068] (3) Soaking: Soak in cryoprotectant for 5 minutes, cryoprotectant: 0.5mol / L propylene glycol, 3mmol / L sorbitol, 3mmol / LVc, 9μmol / L phytic acid, L-cysteine ​​at a concentration of 0.8mg / L kg.

[0069] (4) Quick-freezing: Use a liquid nitrogen tunnel quick-freezing machine, the temperature of the freezing room is -90°C, spray liquid nitrogen and acetic acid / citric acid mist liquid into the freezing room, control the pH value of the freezing room to 6, and keep the material from entering and exiting for 10 minutes. When the material is exporte...

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Abstract

The invention relates to a liquid nitrogen combined liquid carbon dioxide quick-frozen and fresh-keeping method for fresh cordyceps sinensis, and belongs to the technical field of cordyceps sinensis fresh-keeping. The method includes the following steps: 1) cleaning cordyceps sinensis with water; 2) performing ultrasonic cleaning on the cleaned cordyceps sinensis; 3) soaking the cordyceps sinensisin a low temperature protective agent; 4) placing the soaked cordyceps sinensis in a tunnel quick freezing device, spraying acetic acid / citric acid and liquid nitrogen mist, continuously spraying liquid CO2; 5) spraying the quick-frozen cordyceps sinensis with an antistaling agent; 6) performing modified atmosphere packaging on the cordyceps sinensis sprayed with the antistaling agent; and 7) performing refrigeration on the modified atmosphere packaged cordyceps sinensis. The method can solve the problem of the reduction of the freshness of the cordyceps sinensis during fresh-keeping, and islow in weight loss rate, high in soluble protein content and low in polyphenol oxidase activity.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping of Cordyceps sinensis, in particular to a quick-freezing and fresh-keeping method of fresh Cordyceps sinensis combined with liquid nitrogen and liquid carbon dioxide. 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 ...

Claims

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Application Information

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IPC IPC(8): A23L3/375A23L3/349A23L3/3562A23L3/3544A23L3/3508A23L3/3535A23L3/3463A23L3/3526A23L3/358
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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