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Preparation method of composite biologic fresh keeping agent containing pitaya peel extracts

A biological preservative and dragon fruit peel technology, which is applied in the direction of food ingredients containing natural extracts, food ingredients as antimicrobial preservation, food science, etc., can solve the problems of short fresh-keeping time and easy corruption of shrimps, and extend the fresh-keeping period , non-toxic and harmless fresh-keeping effect, the effect of delaying the increase of the total number of bacterial colonies and volatile basic nitrogen

Inactive Publication Date: 2019-04-02
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problem that fresh-keeping shrimps are easy to be corrupted and deteriorated due to short fresh-keeping time, and provides a composite biological fresh-keeping agent of pitaya peel extract, which prolongs the shelf-life of shrimps

Method used

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  • Preparation method of composite biologic fresh keeping agent containing pitaya peel extracts
  • Preparation method of composite biologic fresh keeping agent containing pitaya peel extracts

Examples

Experimental program
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Effect test

Embodiment 1

[0017] A composite biological preservative of pitaya peel extract, which is mainly made of salmon skin gelatin, pitaya peel extract and ε-polylysine.

[0018] A compound biological preservative containing dragon fruit peel extract is prepared by the following steps: (1) Preparation of salmon skin gelatin powder: take salmon skin frozen at -20°C, thaw it at 4°C for 20 hours, and then water Wash, cut into pieces and then soak in 0.2Mol NaoH solution at 4°C for 1 hour, the ratio of solid to liquid during soaking is 1:6; rinse with water until neutral, then soak in 0.05N acetic acid solution for 1 hour, the ratio of solid to liquid during soaking is 1:6; then rinse with water until neutral, then extract the shredded salmon skin in hot water at 60°C for 3 hours, the ratio of solid to liquid during extraction is 1:6, filter with double gauze after extraction, and The filtrate was evaporated and concentrated with a rotary evaporator; finally, the concentrate was pre-frozen in a -80°C...

Embodiment 2

[0022] A composite biological preservative of pitaya peel extract, which is mainly made of salmon skin gelatin, pitaya peel extract and ε-polylysine.

[0023] A compound biological preservative containing dragon fruit peel extract is prepared by the following steps: (1) Preparation of salmon skin gelatin powder: take salmon skin frozen at -20°C, thaw it at 4°C for 20 hours, and then water Wash, cut into pieces and then soak in 0.2Mol NaoH solution at 4°C for 1 hour, the ratio of solid to liquid during soaking is 1:6; rinse with water until neutral, then soak in 0.05N acetic acid solution for 1 hour, the ratio of solid to liquid during soaking is 1:6; then rinse with water until neutral, then extract the shredded salmon skin in hot water at 60°C for 3 hours, the ratio of solid to liquid during extraction is 1:6, filter with double gauze after extraction, and The filtrate was evaporated and concentrated with a rotary evaporator; finally, the concentrate was pre-frozen in a -80°C...

Embodiment 3

[0027] The method of using the composite biological preservative is carried out according to the following steps: take fresh shrimps and soak them in the composite biological preservative containing 2% pitaya extract for 30 seconds. Take it out and drain it, put it into a sterile container and seal it, and finally put it in a refrigerated environment at 4°C.

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Abstract

The invention relates to a preparation method of a composite biologic fresh keeping agent containing pitaya peel extracts. The fresh keeping agent comprises salmon skin gelatin, red-core pitaya peel extracts and epsilon-polylysine. The preparation method comprises the following steps of performing extraction on salmon skin in frozen storage at minus 20 DEG C to obtain the salmon skin gelatin, performing extraction on red-core pitaya peel to obtain the pitaya peel extracts, enabling 1.2g of the salmon skin gelatin and 0.1g of the epsilon-polylysine to dissolve in each 100ml of ultra pure waterto obtain a solution, then adding 2%-3% of the pitaya peel extracts, and performing stirring at normal temperature with a magnetic stirrer for 90min so as to obtain the composite biologic fresh keeping agent. The composite biologic fresh keeping agent disclosed by the invention has favorable fresh keeping effects, raw materials are natural and free from toxic and side effects, increment of total number of colonies and volatile basic nitrogen can be effectively delayed, and further the fresh keeping period of shrimp meat can be prolonged.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping of aquatic products, in particular to a composite biological fresh-keeping agent of pitaya peel extract. Background technique [0002] As a by-product of pulp processing, dragon fruit peel is often discarded. It can be developed and utilized to turn waste into treasure, which can not only improve resource utilization, but also be beneficial to environmental protection and increase the added value of dragon fruit. In fact, the pitaya peel is rich in nutrients, not only rich in various organic acids and proteins, but also contains functional ingredients such as pigments and polyphenols that are rarely seen in general plants, and the polyphenols in the pitaya peel have broad-spectrum resistance to microorganisms and show good performance. antibacterial effect. Therefore, pitaya peel has great potential in aquatic product preservation. [0003] Crayfish is high in protein, low in fat, soft and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B4/20
CPCA23B4/20A23V2002/00A23V2200/10A23V2250/21A23V2250/5432A23V2250/063
Inventor 谢晶刘文茹沈勇梅俊朱振宏王金锋
Owner SHANGHAI OCEAN UNIV