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Ultrahigh-pressure refreshing method for maintaining quality of fresh lotus roots

A fresh-keeping method and ultra-high pressure technology, which are applied in the fields of fruit and vegetable fresh-keeping, food preservation, food science, etc., can solve the problems of lotus seed starch gelatinization, affecting fresh lotus, etc., and achieve good natural flavor and nutrition, convenient eating and easy to control. Effect

Active Publication Date: 2012-08-15
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional thermal processing technology has a good effect of inactivating enzymes, it will gelatinize the lotus seed starch and affect the texture and color of fresh lotus.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Harvesting of fresh lotus: "Jianlian" is used as raw material, the grains are full, the size is uniform, no pests and diseases, and the maturity is over 90%;

[0035] (2) Pretreatment: manually remove the shell, remove the film, and pass the core. After the treatment, put it in water at 10°C~15°C for cleaning, and drain it for later use;

[0036] (3) Color protection by dipping: Quantitatively weigh the compound color protection agent (0.1% ascorbic acid + 0.1% citric acid) and dissolve it to make a color protection solution. Immediately put the pretreated fresh lotus into the color protection solution to soak for color protection. Time 10min, wash and drain after dipping;

[0037] (4) Vacuum packaging: vacuum packaging the fresh lotus that has undergone color protection treatment;

[0038] (5) Ultra-high pressure treatment: put the vacuum-packed fresh lotus in an ultra-high pressure container for ultra-high pressure treatment, the treatment pressure is 500MPa, the...

Embodiment 2

[0042] (1) Harvesting of fresh lotus: "Jianlian" is used as raw material, the grains are full, the size is uniform, no pests and diseases, and the maturity is over 90%;

[0043] (2) Pretreatment: manually remove the shell, remove the film, and pass the core. After the treatment, put it in water at 10°C~15°C for cleaning, and drain it for later use;

[0044] (3) Color protection by dipping: Quantitatively weigh the compound color protection agent (0.15% ascorbic acid + 0.1% citric acid) and dissolve it to make a color protection solution. Immediately put the pretreated fresh lotus into the color protection solution to soak the color protection solution. Time 15min, wash and drain after dipping;

[0045] (4) Vacuum packaging: vacuum packaging the fresh lotus that has undergone color protection treatment;

[0046] (5) Ultra-high pressure treatment: put the vacuum-packed fresh lotus in an ultra-high pressure container for ultra-high pressure treatment, the treatment pressure is 1...

Embodiment 3

[0050](1) Harvesting of fresh lotus: "Jianlian" is used as the raw material, the grains are full, the size is uniform, no pests and diseases, and the maturity is 90%;

[0051] (2) Pretreatment: manually remove the shell, remove the film, and pass the core. After the treatment, put it in water at 10°C~15°C for cleaning, and drain it for later use;

[0052] (3) Dipping color protection: Quantitatively weigh the compound color protection agent (0.2% ascorbic acid + 0.2% citric acid) and dissolve it to make a color protection solution. Immediately put the pretreated fresh lotus into the color protection solution to soak the color protection solution. Time 20min, drain after soaking;

[0053] (4) Vacuum packaging: vacuum packaging the fresh lotus that has undergone color protection treatment;

[0054] (5) Ultra-high pressure treatment: Put the vacuum-packed fresh lotus in an ultra-high pressure container for ultra-high pressure treatment. The temperature of the liquid pressure med...

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Abstract

The invention discloses an ultrahigh-pressure refreshing method for maintaining the quality of fresh lotus roots. The fresh lotus roots after being pretreated and vacuum sealed and packaged are placed into an ultrahigh-pressure vessel, ultrahigh-pressure treatment on the fresh lotus roots is implemented by controlling pressure, medium temperature and pressure maintaining time of an ultrahigh-pressure device in one to three times of a circulation process of pressurizing, pressure maintaining and pressure releasing. The method comprises the steps of: harvesting fresh lotus roots, shelling, stripping, dredging core, protecting color, vacuum packaging, ultrahigh-pressure processing, packaging, and cold storing and obtaining a finished product. Due to the adoption of the method, activities of poly (phenylene oxide) deprecated (PPO) and peroxidase (POD) in the fresh lotus roots can be effectively inhibited, the browning and quality changing of the fresh lotus roots during the processing andstorage period can be prevented, and the preservation period of the fresh lotus roots can be prolonged to more than 3 months under the cold storage condition. The ultrahigh-pressure treatment is a physical process. Due to the adoption of the method, the appearance quality and the nutrients of the fresh lotus roots can be adequately reserved, the technique is simple, maneuverability is strong, energy consumption is small, the method is safe and pollution-free, and a novel way is developed for the lotus industry.

Description

technical field [0001] The invention belongs to the technical field of food preservation, and in particular relates to an ultra-high pressure preservation method for maintaining the quality of fresh lotus. Background technique [0002] Lotus seeds, also known as water pills, belong to the genus Nymphaeaceae ( Nymphaeaceae Nelumbo Adans ), is an important specialty economic resource in my country. Lotus seeds are rich in protein, carbohydrates, vitamins and a variety of essential amino acids, flavonoids, water-soluble polysaccharides, superoxide dismutase (SOD), and trace elements such as calcium, phosphorus, iron, and zinc. Therefore, lotus seeds have been regarded as a high-grade health food since ancient times. Li Shizhen's "Compendium of Materia Medica" records that lotus seeds "can be eaten raw to clear heat and cool blood, gather and disperse, and cooked food can lighten the body and nourish qi, which makes people strengthen the body. . Fresh lotus is favored by con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/00
Inventor 郑宝东张翀郭泽镔张宁宁张怡曾绍校田玉庭刘文聪
Owner FUJIAN AGRI & FORESTRY UNIV
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