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Coating and partial freezing preservation method for hairtail

A fresh-keeping method and hairtail technology, which are applied in food ingredients as antimicrobial preservation, food freezing, meat/fish preservation with chemicals, etc., can solve the problem of aggravating hairtail muscle tissue fibers and cells, accelerating the decomposition of organic substances in the body, muscle Increased juice loss rate and other issues, to achieve good physical and chemical properties and sensory quality, not easy to sag, maintain the effect of physical and chemical properties and sensory quality

Active Publication Date: 2019-04-05
MARINE FISHERIES RES INST OF ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This micro-freezing method has the following defects: (1) storage makes the internal and external temperature gradient of the hairtail larger, and ice crystals are first formed on the surface of the hairtail, and the diameter is the smallest, while ice crystals are formed on the central part, and the ice crystals formed are the largest, resulting in the formation of ice crystals in the micro-freezing process. The melting and recrystallization of small and medium-sized ice crystals change the size and distribution of ice crystals, which in turn aggravates the destruction of hairtail muscle tissue fibers and cells, resulting in an increase in the rate of muscle juice loss after thawing; (2) body cells in hairtail after slight freezing Freezing will increase the concentration of the solution in the unfrozen area adjacent to the cells, increase the enzyme concentration per unit volume, accelerate the decomposition of organic substances in the body, and lead to an increase in the rate of juice loss; (3) micro-freezing after vacuum packaging, due to The isolation effect of the packaging bag, resulting in a slower freezing speed

Method used

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  • Coating and partial freezing preservation method for hairtail
  • Coating and partial freezing preservation method for hairtail
  • Coating and partial freezing preservation method for hairtail

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Pretreatment: Remove the head, tail, and viscera of the hairtail and cut it into long sections to obtain 10cm-long hairtail sections. Clean the hairtail sections with low-temperature flowing water containing sodium chloride, drain, and place in low-temperature flowing water The temperature is 0°C, and the mass percent content of sodium chloride in low-temperature flowing water is 3-5%;

[0034] (2) Bacteria reduction: soak the hairtail section in step (1) in ozone water containing calcium chloride, remove and drain after soaking, and continuously feed nitrogen into the ozone water during the soaking period, and the temperature of the ozone water is 5°C , the immersion time is 10min, the ozone concentration in the ozone water is 2.5mg / L, and the mass percentage of calcium chloride in the ozone water is 0.1%;

[0035] (3) Surface dehydration: dehydrate the hairtail section with cold air, the temperature of the cold air is 0°C, the wind speed is 1m / s, and the dehydrati...

Embodiment 2

[0045] (1) Pretreatment: remove the head, tail, and viscera of the hairtail and cut it into long sections to obtain 15 cm long hairtail sections. Clean the hairtail sections with low-temperature flowing water containing sodium chloride, drain, and place in low-temperature flowing water The temperature is 3°C, and the mass percent content of sodium chloride in low-temperature flowing water is 3.5%;

[0046] (2) Bacteria reduction: soak the hairtail section in step (1) in ozone water containing calcium chloride, remove and drain after soaking, and continuously inject nitrogen into the ozone water during the soaking period, and the temperature of the ozone water is 7°C , the immersion time is 12min, the ozone concentration in the ozone water is 2.8mg / L, and the mass percentage of calcium chloride in the ozone water is 0.12%;

[0047] (3) Surface dehydration: Dehydrate the hairtail section with cold air at a temperature of 3°C, a wind speed of 1.5m / s, and a dehydration time of 7 m...

Embodiment 3

[0057] (1) Pretreatment: remove the head, tail, and viscera of the hairtail and cut it into long sections to obtain 20cm long hairtail sections. Clean the hairtail sections with low-temperature flowing water containing sodium chloride, drain, and place in low-temperature flowing water The temperature is 5°C, and the mass percent content of sodium chloride in low-temperature flowing water is 3-5%;

[0058] (2) Bacteria reduction: soak the hairtail section in step (1) in ozone water containing calcium chloride, remove and drain after soaking, and continuously feed nitrogen into the ozone water during the soaking period, and the temperature of the ozone water is 10°C , the immersion time is 15min, the ozone concentration in the ozone water is 3mg / L, and the mass percentage of calcium chloride in the ozone water is 0.15%;

[0059] (3) Surface dehydration: Dehydrate the hairtail section with cold air at a temperature of 5°C, a wind speed of 2m / s, and a dehydration time of 10 minute...

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Abstract

The invention discloses a coating and partial freezing preservation method for hairtail. The method comprises the following steps of (1) carrying out pretreatment; (2) carrying out sterilization; (3)carrying out surface dewatering; (4) carrying out dipping and coating; (5) carrying out vacuum cooling and drying; (6) carrying out low-temperature quick-freezing; and (7) carrying out partial freezing cold storage. The coating and partial freezing preservation method for the hairtail has the advantages that the hairtail is preserved through a combined coating and partial freezing preservation technology, the steps are simple, the operability is high, the juice loss rate in the unfreezing process of the hairtail can be decreased, the physicochemical properties and the sensory quality of the hairtail can be well maintained, and the shelf life of storage and sale of the hairtail in the partial freezing state can be obviously prolonged.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping aquatic products, in particular to a fresh-keeping method for hairtail coated with micro-freezing. Background technique [0002] Hairtail (Trichiurus haumela) belongs to Actinoptera, Perciformes, Hairtail, and Hairtail. It is mostly found in the Western Pacific and Indian Ocean. It can be seen in all coastal provinces of my country and has the highest production in the East China Sea. It is one of the four major economic fishes in my country. Hairtail is rich in high-quality protein, and its fat content is higher than that of ordinary fish, and most of them are unsaturated fatty acids. Its scales and silvery white oil layer contain 6-thioguanine and rich trace elements, which are very popular among people. Hairtail dies immediately after being caught, and is susceptible to corruption and deterioration under the action of microorganisms and endogenous enzymes during storage and transportation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B4/20A23B4/09
CPCA23B4/09A23B4/20A23V2002/00A23V2200/10A23V2250/124A23V2250/21A23V2250/5114A23V2250/636A23V2300/20
Inventor 李佩佩陈荫张小军严忠雍方益
Owner MARINE FISHERIES RES INST OF ZHEJIANG
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