Freshness-keeping and water-retaining agent for prawns

A water-retaining agent and shrimp technology, which is applied in the direction of preserving meat/fish with a protective coating, preserving meat/fish with chemicals, etc., to achieve the effects of maintaining freshness, ensuring food safety, and reducing freeze-drying consumption.

Inactive Publication Date: 2015-01-28
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, use konjac polysaccharide degradant to be used in fresh-keeping and water-preserving agent and also have no report at present

Method used

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  • Freshness-keeping and water-retaining agent for prawns

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A fresh-keeping and water-retaining agent for prawns, consisting of the following components in mass percentage:

[0023] Water-soluble chitosan 5%, carboxymethyl chitosan 20%, trehalose 10%, antioxidant 10%, konjac polysaccharide degradation product 10%, and the balance is dextrin.

[0024] Water-soluble chitosan is commercially available food-grade water-soluble chitosan.

[0025] Konjac polysaccharide degradation product is to add hemicellulase with 1% konjac polysaccharide content to 2% konjac polysaccharide solution, hydrolyze at 40°C for 1 hour, concentrate until the solid content reaches 10%, and spray dry to obtain konjac polysaccharide degradation product.

[0026] Prepare the prawn fresh-keeping and water-retaining agent with seawater at 0°C to make a 1% aqueous solution, soak the decapped and shelled shrimp in the solution for 10 minutes, remove and drain.

Embodiment 2

[0028] A fresh-keeping and water-retaining agent for prawns, consisting of the following components in mass percentage:

[0029] Water-soluble chitosan 10%, carboxymethyl chitosan 10%, trehalose 20%, antioxidant 5%, konjac polysaccharide degradation product 20%, and the balance is dextrin.

[0030] Water-soluble chitosan is commercially available food-grade water-soluble chitosan.

[0031] Konjac polysaccharide degradation product is to add mannanase with 2% konjac polysaccharide content to 3% konjac polysaccharide solution, hydrolyze at 45°C for 3 hours, concentrate until the solid content reaches 20%, and spray dry to obtain konjac polysaccharide degradation product.

[0032] The shrimp fresh-keeping and water-retaining agent is prepared into a 3% aqueous solution with 5°C seawater 5, and the fresh shrimps are soaked in the solution for 20 minutes, then taken out and drained.

Embodiment 3

[0034] A fresh-keeping and water-retaining agent for prawns, consisting of the following components in mass percentage:

[0035] Water-soluble chitosan 8%, carboxymethyl chitosan 15%, trehalose 15%, antioxidant 8%, konjac polysaccharide degradation product 15%, and the balance is dextrin.

[0036] Water-soluble chitosan is commercially available food-grade water-soluble chitosan.

[0037] Konjac polysaccharide degradation product is to add 3% konjac polysaccharide dextranase to 5% konjac polysaccharide solution, hydrolyze at 50°C for 5 hours, concentrate until the solid content reaches 30%, and spray dry to obtain konjac polysaccharide degradation product.

[0038] Prepare the shrimp fresh-keeping and water-retaining agent with clean water at 10°C to make a 5% aqueous solution, soak the fresh shrimp in the solution for 30 minutes, remove and drain.

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Abstract

The invention relates to a freshness-keeping and water-retaining agent for prawns, belonging to the technical field of processing of aquatic products processing. The freshness-keeping and water-retaining agent is prepared from the following ingredients in percentage by weight: 5-10% of water-soluble chitosan, 10-20% of carboxymethyl chitosan, 10-20% of mycose, 5-10% of an antioxidant, 10-20% of konjac polysaccharide degradation product, and the balance of dextrin. For the freshness-keeping and water-retaining agent, konjac polysaccharide with strong hygroscopic property is degraded into oligosaccharide, which serves as a main auxiliary material of the water-retaining agent, the water-soluble chitosan is taken as a main auxiliary material for a bacteriostatic agent, and the carboxymethyl chitosan is taken as a film-forming agent, so as to prepare the freshness-keeping and water-retaining agent for prawns. After the freshness-keeping and water-retaining agent for prawns is applied to prawn processing, the freshness-keeping time of the prawns can be prolonged, blackening of the prawns is prevented, during refrigeration storage process of the prawns, water can be kept, and loss caused by drying loss is prevented. A processing technology of the freshness-keeping and water-retaining agent is simple, and easy to operate, and expected use effect can be achieved.

Description

technical field [0001] The invention relates to a fresh-keeping and water-retaining agent for prawns, belonging to the technical field of aquatic product processing. Background technique [0002] Prawns belong to Arthropoda, branchial subphylum, crustacea, soft armor subclass, decapod order, swimming suborder, prawn family, and genus prawns. There are 28 species in the world, 7 species on the Atlantic coast of the Americas, 6 species on the Pacific coast, 14 species in the Indo-West Pacific, 1 species in the Pacific and Mediterranean, and 1 species in West Africa. There are 10 species in China, inhabiting tropical and subtropical shallow seas. Shrimp can be divided into sedentary type (such as Japanese prawn, broad groove prawn, European prawn, etc.) and migratory type (such as Chinese prawn, Moji prawn, long-haired prawn). The former type lives in shallow coastal waters and often dives into the sand bottom during the day. Do not move in a large range; the latter type live...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B4/20A23B4/10
Inventor 解万翠杨锡洪曹湛慧吴帅
Owner GUANGDONG OCEAN UNIVERSITY
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