A kind of anti-browning fresh-keeping method of lotus root

A fresh-keeping method and a technology for preventing browning, which are applied in the directions of edible seed preservation, fruit and vegetable fresh-keeping, food preservation, etc., can solve the problems of little practical application value, browning of lotus root cut surfaces, and inability to inactivate polyphenol oxidase, etc. The effect of anti-browning and fresh-keeping is remarkable, the effect of preventing browning and reducing the contact time

Active Publication Date: 2020-11-10
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The Chinese invention patent of CN 101341904 B discloses a method for inhibiting the browning of fresh-cut lotus roots. In the inventive method, the fresh lotus roots are selected, cleaned, cut and sterilized, and treated with hot water at a temperature of 48-55°C4 -After 10 minutes, cool down, remove surface moisture, repackage, refrigerate or sell directly, which has the advantages of simple operation, environmental protection and low cost, but the operation method is too simple, simply treat with 48-55°C hot water for 4-10 minutes The polyphenol oxidase in the section of lotus root cannot be inactivated at all, and the polyphenol oxidase will still oxidize the oxidized phenolic substances into quinones, and then the quinone polymerization reaction will cause browning of the section of lotus root, so the practical application value of the inventive method is not great

Method used

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  • A kind of anti-browning fresh-keeping method of lotus root
  • A kind of anti-browning fresh-keeping method of lotus root
  • A kind of anti-browning fresh-keeping method of lotus root

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Embodiment 1

[0018] A kind of anti-browning fresh-keeping method of lotus root, comprises the following steps:

[0019] 1) Preparation of low-temperature plasma mixed gas; plasma contains a large amount of active oxygen, ultraviolet photons, OH, O 2 − , HOO, NO free radicals and other highly active substances to prepare for further fresh-keeping treatment; 2) Take fresh lotus roots without damage, disease, browning, and shrinkage, and keep the joints intact. After cleaning, wash with 2ppm hydrogen peroxide solution For disinfection, drain the liquid on the surface of the lotus root and place it on a metal plate with holes. At room temperature, quickly place the metal plate and lotus root in an airtight treatment chamber, use a vacuum pump to pump the pressure of the treatment chamber to 1Pa, and then inject cooling plasma 3) Immerse the plasma-treated lotus root in a preservative, the preservative is 0.15 part of nisin, 0.3 part of sodium phytate, 0.3 part of sodium sorbate, grape seed ex...

Embodiment 2

[0021] A kind of anti-browning fresh-keeping method of lotus root, specifically comprises the following steps:

[0022] 1) Plasma preparation: a dielectric barrier discharge configuration device is used as the plasma source, the frequency is 2.55GHz, the power supply is 1.25kW, the ignition mode is ignition / pause: 5s / 7s, and the time period is 20 cycles. The plasma is humidified with water by a humidifier before use; the plasma contains a large amount of active oxygen, ultraviolet photons, OH, O 2− , HOO, NO free radicals and other highly active substances to prepare for further fresh-keeping treatment;

[0023] 2) Treatment: Take fresh lotus roots without damage, disease, browning, or shrinkage, and keep the joints intact. After cleaning, sterilize with 40ppm sodium chloride solution. There is a layer of anti-oxidation corrosion coating on the surface of the metal plate, and its components are: 80g of distilled water, 50g of aluminum dihydrogen phosphate, 0.5g of ethyl ortho...

Embodiment 3

[0027] A method for anti-browning and fresh-keeping of lotus root, comprising: preparation of plasma, treatment, preparation of preservative, post-treatment, specifically comprising the following steps:

[0028] Plasma preparation: The dielectric barrier discharge configuration device is used as the plasma source, the frequency is 2.55GHz, the power supply is 1.25kW, the ignition mode is ignition / pause: 4s / 6s, and the time period is 25 cycles. After being humidified with water by a humidifier, it is ready to use; the plasma contains a large amount of active oxygen, ultraviolet photons, OH, O 2− , HOO, NO free radicals and other highly active substances to prepare for further fresh-keeping treatment;

[0029] Treatment: Take fresh lotus roots without damage, disease, browning, or shrinkage, and keep the joints intact. After cleaning, disinfect with 20ppm chlorine dioxide solution. Drain the liquid on the surface of the lotus root and place it on a metal plate with holes. , The...

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Abstract

The invention discloses a novel anti-browning and fresh-keeping method for lotus roots. The method comprises plasma preparation, treatment, preparation of a preservative and post-treatment. Active substances and groups in the low temperature plasma can undergo a reaction with an amino acid group of polyphenol oxidase on the lotus root surface so that the loss of enzyme activity is caused, oxidative deterioration of the phenols caused by the polyphenol oxidase is inhibited and lotus root browning is prevented. The preservative can effectively act the cytoplasmic membrane of microbial cells so that the synthesis of the microbial plasma membrane and phospholipid compounds is inhibited, cell membrane contents are leaked, even cell lysis is caused and microorganisms are killed and fresh-keepingand anticorrosion effects are obtained. The method is easy to operate, can be used for large-scale operation and has remarkable anti-browning and fresh-keeping effects. The preservative is a water-soluble material easy to elute, can be degraded and absorbed by the human body and is an efficient and safe novel anti-browning and fresh-keeping method for lotus roots.

Description

technical field [0001] The invention relates to the field of food preservation, in particular to a method for anti-browning and preservation of lotus root. Background technique [0002] Lotus root is native to India and was introduced to China very early. The lotus root belongs to the subclass of Magnolia, the order of Shanlong. Like temperature, not tolerant to shade, not suitable for lack of water, strong wind, lotus root is slightly sweet and crisp, can be eaten raw or cooked, and its medicinal value is quite high. Its roots, leaves, flowers, whiskers and fruits are all treasures. Nourishing medicine. Made from lotus root powder, it can relieve food and relieve diarrhea, appetize and clear away heat, nourish and nourish nature, and prevent internal bleeding. It is a good liquid food and nourishing treasure for women, children, children, and the weak and sick. Lotus root is extremely rich in nutrients. Every 100 grams of lotus root contains 77.9 grams of water, 1.0 gram...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23B7/015A23B7/154A23B7/00A23B7/157C09D1/00C09D5/08C09D7/61C09D7/63
CPCA23B7/00A23B7/015A23B7/154A23B7/155A23B9/30A23V2002/00C09D1/00C09D5/08A23V2200/10A23V2200/02A23V2300/48A23V2250/21166A23V2250/5066A23V2250/2116A23V2250/21
Inventor 缪文华
Owner ZHEJIANG OCEAN UNIV
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