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680results about "Meat/fish preservation by coating" patented technology

Composite fresh-keeping method for large yellow croaker

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.
Owner:ZHEJIANG GONGSHANG UNIVERSITY

Freshness-keeping and water-retaining agent for prawns

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.
Owner:GUANGDONG OCEAN UNIVERSITY

Method for prolonging preserving time of chilled fresh chicken

The invention provides a method for prolonging the preserving time of chilled fresh chicken. In the method, a newly slaughtered chick carcass is used as a raw material; nisin, sodium dehydroacetate and glycerol monolaurate are adopted as preservatives; composite preservative is prepared by adding 0.03 to 0.07 grams of nisin, 0.25 to 0.35 grams of sodium dehydroacetate and 0.6 to 0.8 grams of glycerol monolaurate into 1kilogram of sterile water; the glycerol monolaurate is firstly dissolved in 30 milliliters of 65 percent edible ethanol, and is added into the composite preservative; and the pH value of the preservative is adjusted to be between 4.0 and 5.0 by alimentary acetic acid. The storage time of the chilled fresh chicken which is subjected to preserving treatment is obviously prolonged, and is prolonged to 7 days from the primary 4 days, and the quality of the preserved chicken can be well maintained over 7 days. The application of the method ensures that individual slaughtering of the chicken can be transformed into factory slaughtering on the premise that the excellent flavor of the chilled fresh chicken is maintained, thereby greatly improving the environment, reducing pollution of individual chicken slaughtering to urban environment, and ensuring that safety and sanitation of foods can be better controlled.
Owner:GUANGDONG OCEAN UNIVERSITY

Shrimp meat freshness preserving composite film-formation solution and preparation method thereof

The invention discloses a shrimp meat preserving composite film-formation solution in order to solve the problem of poor preservation effect of a shrimp meat preserving film-formation solution in the prior art. The composite film-formation solution is prepared from the following components in percentage by mass: 2%-3% of chitosan, 1%-1.5% of acetic acid, 0.5%-1% of sodium caseinate, 5%-10% of sorbitol, 0.5%-1% of phytic acid, 0.3%-0.5% of trehalose, 0.3%-0.5% of calcium chloride, 0.1%-0.3% of carrageenan, 8%-10% of propolis water extract, 20%-30% of gingerade and the balance of garlic water. The composite film-formation solution is simple and reasonable in formula, excellent in preserving and water-retention performance, and capable of prolonging the preservation time of shrimp meat. The invention also discloses a preparation method of the shrimp meat preserving composite film-formation solution. The preparation method comprises the following steps: weighing all the raw materials in a ratio; evenly mixing acetic acid, propolis water extract, gingerade and garlic water; adding chitosan, sodium caseinate, sorbitol, phytic acid, trehalose and calcium chloride; and finally adding carrageenan to obtain a mixture, evenly mixing the mixture, and standing for 10-15 minutes under vacuum condition. The preparation method has simple technological steps, high operability and low implementation cost.
Owner:SHANTOU JINTAI AQUATIC IND
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