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Refreshing agent and method for inhibiting blackening of prawns

A preservative and shrimp technology, which is applied in the field of preservatives for inhibiting melanization of shrimp, can solve the problem that the effect of inhibiting melanization is not ideal, and achieve the effects of maintaining color, ensuring safety, and extending shelf life

Active Publication Date: 2014-07-30
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: chitosan has film-forming properties and is not suitable for relatively small prawns, which limits the use of this preservative in shrimp bodies. The effect of blackening is not ideal

Method used

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  • Refreshing agent and method for inhibiting blackening of prawns
  • Refreshing agent and method for inhibiting blackening of prawns

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Extract kelp polyphenols

[0022] Weigh 20 g of kelp, wash it twice with distilled water, add 800 mL of ethanol with a concentration of 80wt% after pulverizing the kelp, extract under microwave-assisted conditions, the microwave power is 650 W, and the extraction time is 80 s, filter, and the filtrate is evaporated by rotary evaporation Concentrate, then purify with XDA-1 macroporous adsorption resin, elute with 80% ethanol by mass percentage, concentrate the purified solution by rotary evaporation, pre-cool at -80°C for 6h, take it out and place it in the freezer Freeze-dried in a drier for 24 hours, and the extraction rate of kelp polyphenols was 2.14%; the content of kelp polyphenols was determined by the Folin phenol method, and the content of polyphenols in the prepared kelp polyphenols was 83.27%;

[0023] 2) Extract laminarin

[0024] Weigh 20 g of kelp, wash it twice with distilled water, dry at 105 °C for 20 min, grind the dried kelp into kelp powder, add 8...

Embodiment 2

[0030] 1) Extract kelp polyphenols

[0031] Weigh 20g of kelp, wash it with distilled water for 5 times, add 1200 mL of ethanol with a concentration of 70wt% after crushing the kelp, extract under microwave-assisted conditions, the microwave power is 750W, the extraction time is 60s, filter, and use rotary evaporation to concentrate the filtrate , then purified with XDA-1 macroporous adsorption resin, eluted with 70% ethanol by mass percentage, concentrated the purified solution by rotary evaporation, pre-cooled at -80°C for 6h, took it out and placed it in freeze-drying Freeze-dried in the machine for 24 hours, and the extraction rate of kelp polyphenols was 2.47%; the content of kelp polyphenols was determined by the Folin phenol method, and the content of polyphenols in the prepared kelp polyphenols was 83.57%;

[0032] 2) Extract laminarin

[0033] Weigh 20 g of kelp, wash it with distilled water for 5 times, dry it at 105 °C for 20 min, grind the dried kelp into kelp pow...

Embodiment 3

[0039] 1) Extract kelp polyphenols

[0040]Weigh 20g of kelp, wash it with distilled water for 3 times, add 1000mL of ethanol with a concentration of 75wt% after pulverizing the kelp, extract under microwave-assisted conditions, the microwave power is 700W, the extraction time is 70s, filter, and use rotary evaporation to concentrate the filtrate, Then purify with XDA-1 macroporous adsorption resin, elute with 75% ethanol by mass percentage, concentrate the purified solution by rotary evaporation, pre-cool at -80°C for 6 hours, take it out and place it in a freeze dryer Freeze-dried in medium for 24 hours, the extraction rate of kelp polyphenols was 2.73%; the content of kelp polyphenols was determined by the Folin phenol method, and the content of polyphenols in the prepared kelp polyphenols was 84.09%;

[0041] 2) Extract laminarin

[0042] Weigh 20 g of kelp, wash it with distilled water three times, dry it at 105 °C for 20 min, grind the dried kelp into kelp powder, add 1...

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Abstract

The invention provides a refreshing agent and method for inhibiting blackening of prawns. The refreshing agent comprises ergothioneine, kelp polyphenols, laminarin, and glacial acetic acid. The refreshing method comprises the following steps: extracting kelp polyphenols and laminarin; then adding ergothioneine, the extracted kelp polyphenols and the extracted laminarin to deionized water; uniformly agitating; and then adding glacial acetic acid to obtain the refreshing agent, wherein the prepared refreshing agent comprises 0.2 to 0.9% of ergothioneine in mass percent concentration, 0.3 to 0.9% of kelp polyphenols in mass percent concentration, 0.3 to 1% of laminarin in mass percent concentration, and 0.6 to 1% of glacial acetic acid in mass percent concentration. The refreshing agent is used for refreshing prawns. The refreshing method has the advantages of being few in steps and convenient in operation; the refreshing agent can remain the original color and luster of the prawns, shows a good blackening inhibiting effect and great antibacterial effect, keeps the prawns fresh, and also can prolong the shelf life of prawn products.

Description

technical field [0001] The invention belongs to the field of fresh-keeping of seafood, in particular to a fresh-keeping agent for inhibiting blackening of prawns and a fresh-keeping method thereof. Background technique [0002] Prawns are one of the main cultured seafood in my country. Because of their tender and delicious meat, high protein content and rich nutrition, they have become popular dishes on people's tables. After the prawns die, the color source substances in the body undergo a series of oxidation and polymerization under the action of polyphenol oxidase, forming melanin and depositing on the surface of the shrimp body, resulting in blackening of the shrimp body. Blackening is an important reason for the decline in the sensory quality of prawns, which will lead to a decline in quality and a shortened shelf life. [0003] With the improvement of living standards, the quality requirements of food are getting higher and higher. Ordinary freezing preservation meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L3/3472
CPCA23L3/3472A23L3/3508A23V2002/00A23V2200/048A23V2250/202
Inventor 蔡路昀励建荣李学鹏李秀霞吕艳芳曹爱玲吴晓洒
Owner BOHAI UNIV
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