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Method for preserving lotus root with garlic extract and onion extract

A technology of onion extract and garlic, which is applied in the direction of protecting fruits/vegetables with a coating protective layer, can solve the problems of hardness reduction, weight reduction, and browning of fresh lotus root during storage, and achieve browning inhibition, low cost, and maintenance The effect of nutritional value

Inactive Publication Date: 2017-08-18
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is: provide a kind of method of garlic and onion extract fresh-keeping lotus root, this method utilizes garlic extract and onion extract to make composite coating film preservative as the preservative of lotus root with skin, fresh-keeping effect is good, The preservation period can reach more than 5 months, which solves the problems of browning, hardness reduction and weight loss of fresh lotus root during storage

Method used

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  • Method for preserving lotus root with garlic extract and onion extract
  • Method for preserving lotus root with garlic extract and onion extract
  • Method for preserving lotus root with garlic extract and onion extract

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: a kind of method of garlic and onion extract preservation lotus root, comprises the following steps:

[0028] (1) Weigh a certain amount of fresh garlic, manually peel it and crush it with a beater, use the alliinase of garlic itself to enzymolyze alliin for 30 min at 40°C, which is a key step in the production of garlic oil, and then press Add 10mL of ethanol solution to 1g of garlic, add the ethanol solution with a mass fraction of 70-80% to the garlic, extract in a constant temperature water bath at 35°C for 3 hours, filter with a filter cloth, and then vacuum filter. The ethanol in the filtrate is evaporated by rotary evaporation. Instrument recovery, to obtain garlic crude extract.

[0029] (2) Weigh a certain amount of fresh onion, peel it, crush it with a beater, and use its own enzyme to carry out enzymatic hydrolysis in the dark for 30 minutes at 40°C, and then add 10mL of ethanol solution to 1g of onion to add a mass fraction of 70-80%. The etha...

Embodiment 2

[0037] Embodiment 2: a kind of method of garlic and onion extract preservation lotus root, comprises the following steps:

[0038] (1) Weigh a certain amount of fresh garlic, manually peel it and crush it with a beater, use the alliinase of garlic itself to enzymolyze alliin for 30 min at 40°C, which is a key step in the production of garlic oil, and then press Add 1g of garlic to 5mL ethanol solution, add 70-80% ethanol solution to the garlic, extract in a constant temperature water bath at 35°C for 3 hours, filter with a filter cloth, and then vacuum filter, and the ethanol in the filtrate is evaporated by rotary evaporation Instrument recovery, to obtain garlic crude extract.

[0039] (2) Weigh a certain amount of fresh onion, peel it, crush it with a beater, and use its own enzymes to carry out enzymatic hydrolysis in the dark for 30 minutes at 40°C, and then add 1g of onion to 5mL ethanol solution to add a mass fraction of 70-80%. The ethanol solution was added to the on...

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Abstract

The invention relates to a method for preserving a lotus root with garlic extract and onion extract. The method comprises the following steps of: (1) preparing crude garlic extract; (2) preparing crude onion extract; (3) preparing compound preservative: weighing the crude garlic extract and dissolving the crude garlic extract in water, adding the crude onion extract, pullulan and konjac gum in sequence after the crude garlic extract is fully dissolved and stirring the solution uniformly, adjusting the pH of the solution to 4.6-4.8 with citric acid and diluting the solution with water, blending the solution with ultrasonic wave, and cooling the solution to room temperature for standby use, then the compound preservative is prepared; (4) selecting the lotus root raw materials; (5) washing and cutting the lotus root; (6) sterilizing; (7) keeping brittleness; (8) filming; and (9) vacuum packing and refrigerating the lotus root. According to the method for preserving the lotus root with the garlic extract and the onion extract, the garlic extract and the onion extract are used to prepare the compound film preservative serving as the preservative of the lotus root with skins, the compound film preservative has a good preservation effect, and the preservation period can be up to 5 months or above, and thus the problems of browning, hardness decrease and weight decrease in storing the fresh lotus root are solved.

Description

technical field [0001] The invention relates to a method for preserving fresh lotus root, in particular to a method for preserving fresh lotus root by using a composite coating preservative made of various reagents to carry out fresh-keeping treatment of garlic and onion extracts. Background technique [0002] In addition to the high vitamin C content in lotus root, the mineral content is also quite high. It has good medicinal effects and is beneficial to the heart. It also promotes metabolism, and can also keep the skin lubricated and prevent roughness. Lotus root is an important economic crop in agricultural planting areas. In addition to being supplied in large quantities at home and abroad, it is also exported to some European and American countries in different processing forms such as boiled lotus root and salted lotus root. However, the sales and export of lotus root are affected due to its high water content, easy browning, and intolerance to storage and transportati...

Claims

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Application Information

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IPC IPC(8): A23B7/16
Inventor 许金蓉岳新霞刘纯友
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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