Composite fresh-keeping method for large yellow croaker

A compound fresh-keeping, large yellow croaker technology, applied in the preservation of meat/fish, food preservation, preservation of meat/fish with chemicals, etc. The effect of conception science

Active Publication Date: 2014-08-13
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Large yellow croaker is very popular because of its tender and delicious meat, rich nutrition and medicinal value. However, due to its high water content, high fat and high pH, ​​the fish meat is easily spoiled

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Soak the large yellow croaker frozen to death with crushed ice in 2.50 mg / L ozone water for 5 minutes, take out and soak in 2.00 g / L tea polyphenols and 1.00 g / L Nisin solution that have been fully dissolved in sterilized water for 30 minutes, take it out at 10.00 g / L chitosan solution (dissolved in 1% acetic acid) soaked for 30 seconds, drained to form a film, 70% CO 2 / 30% N 2 Modified atmosphere packaging. At the end of the shelf life of the refrigerated large yellow croaker (4°C) control group at 6 days, the total number of bacteria and volatile basic nitrogen (TVB-N) in the treatment group decreased by 3.8 log CFU / g and 17 mg / 100g, respectively, and the shelf life was extended by more than 16 days .

Embodiment 2

[0022] Soak large yellow croakers frozen to death with crushed ice in 1.30 mg / L ozone water for 7 minutes, take out and soak in 1.80 g / L tea polyphenols and 1.20 g / L Nisin solution that have been fully dissolved in sterilized water for 30 minutes, take out in 10.00 g / L chitosan solution (dissolved in 1% acetic acid) soaked for 30 seconds, drained to form a film, 60% CO 2 / 40% N 2 Modified atmosphere packaging. At the end of the shelf life of the refrigerated large yellow croaker (4°C) control group at 6 days, the total number of bacteria and TVB-N in the treatment group decreased by 2.9 log CFU / g and 15 mg / 100g, respectively, and the shelf life was extended by more than 12 days.

Embodiment 3

[0024] Rinse the crushed and frozen large yellow croaker with 5.00 mg / L ozone water for 2 minutes, soak in 2.00 g / L tea polyphenols and 1.80 g / L Nisin solution that have been fully dissolved in sterilized water for 30 minutes, and take it out at 10.00 g / L Chitosan solution (dissolved in 1% acetic acid) soaked for 30 seconds, drained to form a film, 75% CO 2 / 25% N 2 Modified atmosphere packaging. At the 9th day at the end of the shelf life of the refrigerated large yellow croaker (0°C) control group, the total number of bacteria and TVB-N in the treatment group decreased by 3.5 log CFU / g and 17 mg / 100g, respectively, and the shelf life was extended by more than 9 days.

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PUM

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Abstract

The invention relates to a fresh-keeping method for aquatic products, specifically to a composite fresh-keeping method for large yellow croaker. The fresh-keeping method mainly comprises a step of modified atmosphere packaging of cultured large yellow croaker with tea polyphenol, nisin and chitosan as biological fresh-keeping agents after sterilization with ozone water. The method comprises the following concrete steps: freezing fresh and alive cultured large yellow croaker to death with crushed ice; treating the frozen cultured large yellow croaker with ozone water for 1 to 8 min; soaking the treated large yellow croaker in a solution for 20 to 40 min, wherein the solution is prepared by fully dissolving tea polyphenol and nisin in sterile water; taking the soaked large yellow croaker in a chitosan (dissolved with 1% acetic acid) solution for 30 s; and carrying out draining and film forming and then successively carrying out modified atmosphere packaging and refrigeration at a temperature of 0 to 4 DEG C. The composite fresh-keeping method has a scientific conception, poses no influence to sensory quality of the cultured large yellow croaker, is safe and harmless to human health, can substantially prolong the shelf life of the cultured large yellow croaker under refrigeration conditions, improves eating quality of large yellow croaker and broadens the marketing range of large yellow croaker.

Description

technical field [0001] The invention relates to a fresh-keeping method of aquatic products, in particular to a composite fresh-keeping method of large yellow croaker. Background technique [0002] large yellow croaker ( Pseudosciaena crocea ) is one of the important economic fishes in China, and it is also the fish with the highest yield in aquaculture. Large yellow croaker is very popular because of its tender and delicious meat, rich nutrition and medicinal value. However, due to its high water content, high fat and high pH, ​​the fish meat is easily spoiled. Factors such as autolytic enzyme reaction, microbial reproduction, fat oxidation, external pollution, mechanical damage and other factors in fish will cause the quality of fish to deteriorate. Among them, the growth of specific spoilage bacteria and the formation of amines, sulfides, aldehydes, ketones and organic Acid, etc., produce bad gas and flavor, which is the main cause of spoilage. At present, refrigeration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B4/00A23B4/10A23B4/16
Inventor 朱军莉陆海霞孙丽霞王桂阳
Owner ZHEJIANG GONGSHANG UNIVERSITY
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