10 results about "Fish preservation" patented technology

This invention discloses a multifunctional self-inflating live fish preservation and emergency rescue storage bag, belonging to the fields of daily storage, aquatic product transportation, and public safety emergency technology. Addressing industry pain points such as the limited functionality of existing equipment, the inability to readily carry rescue gear, the lack of lightweight drowning prevention equipment in primary and secondary schools, the reliance of traditional live fish bags on external devices, insufficient disclosure of technical solutions, and the lack of quantitative performance support, this invention employs a built-in negative pressure self-inflating capsule combined with a one-way pressure regulating valve and a roll-up buckle sealing structure. It defines complete material parameters, negative pressure parameters, pressure stabilization threshold, and buoyancy performance parameters, achieving integrated switching between three cross-domain functions: daily waterproof storage, long-term oxygen-preserving transportation of live fish without equipment, and emergency buoyancy rescue in aquatic environments. Actual testing shows that this invention improves inflation efficiency by over 85%, increases live fish survival time by 200%, reduces leakage rate to 0%, and provides stable buoyancy support for self-rescue by teenagers. This invention breaks through the functional and scenario limitations of existing technologies. The solution is complete, mass-producible, and reproducible. It can be carried by the general public, especially primary and secondary school students, on a regular basis. After its popularization, it can significantly reduce the risk of drowning accidents. It is in line with the policy orientation of campus drowning prevention and safety. It has significant industrial innovation value and social public safety value. It is highly creative, extremely practical, and has broad prospects for promotion.

This invention provides a seafood freshness preservation device that effectively cools seafood and maintains its freshness by efficiently circulating the water in the fish tank to maintain a uniform temperature inside the tank. [Solution] A fish freshness preservation device that maintains the freshness of seafood in a fish tank 2 by circulating cooled water in the fish tank 2 to equalize the water temperature, comprising a pump 10 positioned at the bottom of the fish tank 2 to draw up water from the lower part of the fish tank 2, and a discharge pipe 12 connected to the pump 10 and positioned substantially around the entire circumference of the upper part of the fish tank 2, which discharges the water drawn up by the pump 10 into the fish tank 2 from a plurality of discharge ports 18 provided on its side wall.

The application belongs to the field of food preservation technology, and relates to a chitosan-gelatin composite preservative solution based on plasma-activated water modification and a preparation method and application thereof. First, PAW is used to prepare chitosan solution and gelatin solution respectively, and the composite preservative solution is obtained after mixing and homogenizing. The coating is dehydrated to form a preservative film. The PAW is prepared by treating deionized water with low-temperature plasma, and is rich in active ingredients such as hydroxyl radicals and hydrogen peroxide, which can effectively modify chitosan and gelatin, enhance intermolecular crosslinking, and form a composite film with a dense network structure. The composite film can be applied to fish preservation through coating or immersion, can effectively inhibit the growth of microorganisms, and can improve the color of fish fillets. In addition, the composite film has the function of delaying protein degradation by inhibiting endogenous protease activity, thereby maintaining the muscle tissue structure and prolonging the shelf life of chilled fish fillets. The application has the advantages of simple process, green safety, remarkable preservation effect, and wide market application prospect.

The invention belongs to the technical field of food preservation, and relates to a chitosan-gelatin composite preservation solution based on plasma activated water modification as well as a preparation method and application of the chitosan-gelatin composite preservation solution. The preparation method comprises the following steps: respectively preparing a chitosan solution and a gelatin solution by adopting PAW, mixing and homogenizing to obtain the composite fresh-keeping liquid, and dehydrating a coating to form a fresh-keeping film. Wherein PAW is prepared by treating deionized water through low-temperature plasma, is rich in active ingredients such as hydroxyl free radicals and hydrogen peroxide, can effectively modify chitosan and gelatin, enhance intermolecular crosslinking and form a composite film with a compact network structure, can be applied to fish preservation in a coating or dipping mode, can effectively inhibit growth of microorganisms, and has the advantages of being good in preservation effect and good in preservation effect. Meanwhile, the fillet color is improved. In addition, the function of delaying protein degradation by inhibiting the activity of endogenous protease so as to maintain the muscular tissue structure is achieved, and the shelf life of the refrigerated fillets is prolonged. The method is simple in process, green, safe, remarkable in preservation effect and wide in market application prospect.

The invention discloses an ultralow-temperature preservation method for groupers, which belongs to the technical field of fish preservation and comprises the following steps: soaking the groupers in a specific composite preservation solution (the composite preservation solution consists of longan polysaccharide, chitosan and water) for pretreatment, precooling, quickly cooling, freezing and storing and the like. According to the method, the preservation period of the grouper can be effectively prolonged to 6-12 months, juice loss is reduced, and the quality and nutritional ingredients of the grouper are kept.

The application discloses a chitosan composite film and a preparation method and application thereof, and belongs to the technical field of food preservation materials. The chitosan composite film comprises the following raw materials: chitosan, zein, Span 80, a natural eutectic solvent and aesculin. The preparation method comprises the following steps: mixing chitosan solution, zein solution, Span 80, the natural eutectic solvent and aesculin, stirring and ultrasonic treatment, and preparing a film-forming solution; and the film-forming solution is dried through a flow casting method to prepare the chitosan composite film. That is, the chitosan is blended with the zein, the natural eutectic solvent is used for plasticizing, and the aesculin is used for functionalization, so that the mechanical properties, the antibacterial property and the antioxidant property of the film are synergistically improved, and the fish preservation period is significantly prolonged.

The invention discloses a chitosan composite film and a preparation method and application thereof, and belongs to the technical field of food fresh-keeping materials, the chitosan composite film comprises the following raw materials: chitosan, zein, Span 80, a natural eutectic solvent and aesculin; the preparation method comprises the following steps: mixing a chitosan solution, a zein solution, span 80, a natural eutectic solvent and aesculin, and carrying out stirring and ultrasonic treatment to prepare a film-forming solution; and drying the film forming solution through a tape casting method to obtain the chitosan composite film. According to the invention, chitosan and zein are blended, and the natural eutectic solvent is used for plasticizing and aesculin is used for functionalization, so that the mechanical property, antibacterial property and oxidation resistance of the film are synergistically improved, and the fresh-keeping period of fish meat is remarkably prolonged.

This invention provides a seafood freshness preservation device that effectively cools seafood and maintains its freshness by efficiently circulating the water in the fish tank to maintain a uniform temperature inside the tank. [Solution] A fish freshness preservation device that maintains the freshness of seafood in a fish tank 2 by circulating cooled water in the fish tank 2 to equalize the water temperature, comprising a pump 10 positioned at the bottom of the fish tank 2 to draw up water from the lower part of the fish tank 2, and a discharge pipe 12 connected to the pump 10 and positioned substantially around the entire circumference of the upper part of the fish tank 2, which discharges the water drawn up by the pump 10 into the fish tank 2 from a plurality of discharge ports 18 provided on its side wall.

The utility model discloses a live fish low-temperature dormancy out-of-water keep-alive transport case, and relates to the technical field of live fish transportation, the live fish low-temperature dormancy out-of-water keep-alive transport case comprises a case body, an inner cavity of the case body is provided with a plurality of groups of placing assemblies distributed at equal intervals, and the inner cavity of the case body is provided with a spraying assembly above each group of placing assembly; the placing assembly comprises a plurality of sets of through grooves which are formed in the front side of the box body and distributed at equal intervals, a placing frame is slidably connected into each set of through grooves, and a grid plate is fixedly installed at the bottom of each placing frame. The movable plate is moved according to the size of the dormant fishes, the internal space of the placing frame is adjusted, and the dormant fishes matched with the dormant fishes in size are placed in respective grids to be separated, so that on one hand, collision among the dormant fishes can be avoided, and on the other hand, the dormant fishes can be placed in different grids according to the size of the dormant fishes; the fish with the large size is prevented from being extruded to die during transportation, so that the survival rate of the dormant fish is greatly improved.