814 results about "Food Preservers" patented technology

The present invention provides a food preservation system that includes a multi-phase bacterial inhibition food pad. The food pad includes absorbent media and/or material to absorb fluids emanating from the packaged food. The absorbent media/material includes one or more bacterial inhibitors that may possess bacteriostatic and/or bactericidal properties. In addition, the food pad may also include an atmosphere modification system capable of modifying an atmosphere in a food package. Optionally, one or more reaction promoters and/or one or more mechanisms to protect the food preservation system may also be included in the food pad. Overall, the food preservation system inhibits bacterial growth, thereby enhancing food preservation and/or food safety.

The invention relates to a method for preparing a chitosan-based composite preservative film or a coating, belonging to the technical field of food preservation. According to the technical scheme, the method comprises the following steps: dissolving chitosan in an aqueous solution of acetic acid, adding an aqueous solution of natural active substances with antioxidant and antibacterial functions, heating, stirring and ultrasonically defoaming to obtain the chitosan-based composite preservative film or a coating film solution; casting and drying the chitosan-based composite preservative film or the coating film solution to obtain a chitosan-based composite preservative film; and coating the chitosan-based composite preservative film or the coating film solution on the surface of food so as to obtain the chitosan-based composite preservative coating. According to the prepared chitosan-based composite preservative film or the coating, the antibacterial performance and the moisture resistance of the chitosan film are improved, and the chitosan-based composite preservative film or the coating is endowed with novel antioxidant functions and has degradable and edible characteristics. When meat, oil or fruit and vegetable foods are packaged or coated by the obtained chitosan-based composite preservative film or the coating, the quality guarantee period can be effectively prolonged, and the chitosan-based composite preservative film or the coating has wide application prospect.

The invention relates to a nanofiber membrane and particularly relates to a novel composite nanofiber membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) dissolving any one of polyvinyl alcohol, polylactic acid and regenerated silk fibroin in an organic solvent to prepare a spinning solution with the mass fraction of 5-20 percent; (2) adding polyphenol substances to the spinning solution, and uniformly stirring to obtain a mixed spinning solution which accounts for 1-7 percent of the total mass of the polyphenol substances and the organic solvent, wherein the polyphenol substances are one or more of vegetable tannin, apple polyphenol and grape polyphenol; (3) carrying out ultrasonic treatment on the mixed spinning solution for 1-600 minutes; and (4) carrying out electrostatic spinning on the mixed spinning solution and collecting to obtain the required composite nanofiber membrane. After subjected to electrostatic spinning, the composite nanofiber membrane is smooth in surface, continuous and uniform, has the diameter of between 100nm and 800nm and can be applied to the fields of medical dressing, makeup facial masks, tea bags, controlled release of targeted drugs, food preservation and sewage purification.

A food preservation management refrigerator comprises a food preservation period database, a food remaining preservation time database and a display device. The food preservation period database stores original food preservation periods; according to the food remaining preservation time database, when food is stored into a refrigerator body, the refrigerator body starts timing and reads the original food preservation period of the food from the food preservation period database, the food remaining preservation time of the food can be acquired through calculation according to the original food preservation period and the actual storage time and can be stored in the food remaining preservation time database, all foods in the refrigerator body are sequenced according to the food remaining preservation time through the food remaining preservation time database, foods with the food remaining preservation time smaller than a first preset value are classified into a first class, foods with the food remaining preservation time which is larger than or equal to the first preset value but smaller than a second preset value larger than the first preset value are classified into a second class, and foods with the food remaining preservation time larger than or equal to the second preset value as a third class; the display device displays the foods of the first, second and third classes respectively.

A food preservation device has a cover made of silicone and a valve mounted through the cover, and the cover includes a plate with a skirt. The valve has a T-shaped air passage. The silicone cover has flexibility and elasticity, and further possesses heat resistance feature whereby food can be heated in a micro-wave oven or bamboo steamer, and the T-shaped air passage communicates with ambient air, whereby the container will not accumulate excessive heat, nor will fluid in the food splash out.

The invention discloses an intelligent food preservation device, a preservation method and a refrigerator using the intelligent food preservation device. An irradiation generator is used for emitting an irradiation signal for sterilization; an image detector is used for acquiring image and ingredient information of food; a gas sensor array is used for acquiring smell emitted by food; a pressure sensor, the irradiation generator, the image detector, the gas sensor array, a humidity sensor and a humidity regulator are connected with an analysis and control unit respectively for data transmission; a display mechanism is used for displaying data signals transmitted by the analysis and control unit. By acquisition of concentration changes of gas emitted by food in a preservation process, the freshness and security degree of food in the current refrigerator can be accurately judged; weight of different kinds of food in the refrigerator is further detected dynamically, and specific food types are recognized and detected through combination with images, therefore, information related to the food preserved in the refrigerator can be known more comprehensively and effectively.

The invention discloses a food preservative. The food preservative is used as a food additive, and includes natamycin and an acidic material. A base material of the food preservative is composed of the natamycin and the acidic material and the mass percent ratio between the natamycin and the acidic material is (0.0005-2.333):1. The food preservative provided by the invention has the characteristics of good solubility in ethyl alcohol, high stability, a wide antimicrobial spectrum and high activity. Meanwhile, the food preservative is easy to use and effectively inhibits various kinds of microorganisms like mould, bacteria, and yeast, so as to guarantee food quality and prevent food from growing mould, meet the requirements of food preservation and freshness maintenance and meet the demands of people on food safety.

The invention discloses a food fresh-keeping storehouse with a full-automatic vending function. The food fresh-keeping storehouse comprises a storehouse body, a computer network platform, a food storage bin, an environment adjusting system, a food identification code recognition system, an automatic-warehouse-in-out system and a computer centralized control system. The food fresh-keeping storehouse is capable of storing and keeping fresh of a plurality of varieties of food and is provided with the full-automatic vending function and an internet communication function. The invention further discloses a vending method of the food fresh-keeping storehouse with the full-automatic vending function. The method includes that the food fresh-keeping storehouse for storing the varieties of the food is set close to users and connected into the internet, a commercial tenant uploads related data to a commercial tenant website and the computer network platform of the food fresh-keeping storehouse with the full-automatic vending function; a user logs in the network platform of the food fresh-keeping storehouse with the full-automatic vending function to selectively purchase the food, pays via a third party payment platform to complete a transaction to obtain a pickup identification code for the purchased food, and goes to the food fresh-keeping storehouse with the full-automatic vending function to pick up the purchased food on the basis of the food identification code. The food fresh-keeping storehouse with the full-automatic vending function is convenient, quick, safe and reliable and is provided with an extremely high commercial value.

The invention relates to a controlled atmosphere fresh fruit and vegetable vending machine. A controlled atmosphere fresh fruit and vegetable vending machine comprises a goods storage cabinet which is provided with a numerical control controlled atmosphere fresh preservation system, wherein material storage lattices are arranged in the storage cabinet; the goods storage cabinet is divided into display lattices with doors; each display lattice is provided with an automatic goods replenishment device connected with a main control unit; and the automatic goods replenishment device is used for replenishing goods in the material storage lattices into the display lattices. The controlled atmosphere fresh fruit and vegetable vending machine solves the problem of the requirements on food fresh-keeping and quality-keeping of fruit and vegetable products in a terminal selling link, is in stepping linkage with a currency payment system, and has the functions of automatically opening a selected fruit and vegetable food electronic door to take the goods and automatically closing the electronic door after the goods is taken.

The invention discloses a preparation method of goat cheese protein source antibacterial peptide. The preparation method comprises the following steps: performing enzymolysis on the goat cheese protein by use of papain; separating and desalting the zymolyte by use of macroporous nonpolar resin; purifying by semi-preparation gel permeation chromatograph; and performing freeze drying to obtain goat cheese protein source antibacterial peptide powder. The result of the trial experiment on antibacterial function carried out by the applicant indicates that the molecular weight of the prepared goat cheese protein source antibacterial peptide is below 3,000, and the goat cheese protein source antibacterial peptide is easy to absorb and utilize; the secondary structure of the obtained goat cheese protein source antibacterial peptide is mainly a random coil; and the goat cheese protein source antibacterial peptide is a nontoxic green natural antibacterial peptide, has good antibacterial properties on escherichia coli, staphylococcus aureus, salmonella and the like, and has a remarkably broad application prospect in the preservation of milk and dairy products, cosmetics and other food.

The invention relates to a refrigerator internal food reminding device and method and a refrigerator. The device comprises a food type obtaining device, a data processing device and an information reminding device connected in sequence; the food type obtaining device generates food type information according to food put in the refrigerator, and sends the food type information to the data processing device; and the data processing device monitors the food placing time length, and controls the information reminding device to send corresponding reminding information according to the food type information, the placing time length and food preservation time length control information corresponding to the food type information. Through the reminding information, users can know present food in the refrigerator, the placing time length and the preservation time length of the food, and conveniently know the information of the food stored in the refrigerator in time; according to the food placing time length, the users can know the freshness degree of the food; and when the freshness degree is lower, the food is taken out in time, so that the waste of the food is prevented, and the use reliability of the refrigerator internal food reminding device is improved.

The invention provides a preservation control method of a refrigerating and freezing device. The refrigerating and freezing device comprises a box body, an air-adjusted film assembly, an air sucking pump and oxygen concentration sensors, wherein a storage space is defined by the box body. The storage space is internally provided with sealed preservation subspaces. The oxygen concentration sensors are arranged in the preservation subspaces. The air sucking pump is configured to make air of the preservation subspaces of the storage space permeate through the air-adjusted film assembly. Air atmospheres facilitating food preservation are formed in the preservation subspaces of the storage space. The preservation control method comprises the steps of detecting varieties of food placed in the preservation subspaces; determining corresponding preservation operation conditions according to the varieties of the food, specifically, the preservation operation conditions at least comprise the oxygen concentration ranges corresponding to the variety information of the food; and obtaining the oxygen concentrations, measured by the oxygen concentration sensors, of the preservation subspaces and correspondingly controlling the air sucking pump, so that the oxygen concentrations of the preservation subspaces are kept in the oxygen concentration ranges, and accordingly the storage requirements of different types of food are met.

The invention discloses a kiwi fruit preservation method, and belongs to the technical field of fruit preservation. According to the method, the step of spraying composite spraying agent to kiwi fruits before harvesting and the step of treating after harvesting are organically combined, wherein the composite spraying agent is characterized in that 50-300 mg of organic calcium, 10-50 mg of auxin additive and 1-20 g of chitosan oligosaccharide substance are contained in each liter of water. The preservation method disclosed by the invention can be used for delaying the descent rate of the hardness of the kiwi fruits, effectively inhibiting the pectin polygalacturonase (PG) activity, and postponing the peak of respiration rate of the kiwi fruits, so that the rotting rate after the fruits are picked is effectively reduced, and the storage life of the kiwi fruits is remarkably prolonged.

The invention discloses a natural, edible, solid and convenient edibility food pectin preservative film. Meanwhile, the invention also discloses a method for preparing the edibility food pectin preservative film. The method comprises the following steps: preparing the pectin and deionized water into a pectin emulsion; and then, adding a natural edible film former into the pectin emulsion to prepare a composite emulsion; homogenizing the composite emulsion after the composite emulsion is heated for a period at constant temperature; and placing the composite emulsion in a filming machine for natural drying so as to produce the edibility food pectin preservative film. The edibility food pectin preservative film has excellent shearing resistance and tensile strength, has performances of oxygen permeation, carbon dioxide permeation, water vapor permeation and the like which are applicable to most foods, has the advantages of edibility and non-pollution, and can be applied to the fields of food fresh-keeping, such as fruit fresh-keeping, vegetable fresh-keeping and the like.

The invention discloses a fresh micro-freezing liquid used for keeping food fresh. The fresh micro-freezing liquid used for keeping the food fresh comprises the following components, by weight, 4% of sodium chloride, 10% of ethyl alcohol, 0.8% of chitosan, 0.3% of antifreeze protein, and the balance water. The fresh micro-freezing liquid used for keeping the food fresh can achieve quick freezing of frozen food after the frozen food is immersed, and is high in freezing quality.

The invention provides a food fresh keeping pad which includes a flat bag formed by jointing and sealing the edges of a surface layer, a middle layer, and a bottom layer with each other; upper layer space enclosed by the surface layer and the middle layer; lower layer space enclosed by the middle layer and the bottom layer; fillings in the upper layer space; and liquid absorbing material in the lower layer space. The fillings is selected from at least one of first filling containing carbon dioxide gas generating agent and second filling containing the chlorine dioxide gas generating agent. The surface layer is plastic membrane, the middle layer is semi-transparent membrane possessing the water-proof and ventilative functions, and the bottom layer is plastic membrane or non-woven cloth with pores through which moisture can pass. The food fresh keeping pad can emit carbon dioxide and chlorine dioxide gases which possess the multi-functions of fresh-keeping, antisepsis, and deodorization, and the carbon dioxide and chlorine dioxide gases are innoxious. The food fresh keeping pad also includes liquid absorbing material for absorbing the liquid exuded from meat, and then performs the bacteria inhibiting and antisepticising functions.

The invention discloses a preparation method of a mushroom preservative film, and belongs to the field of food fresh keeping. The method comprises the following steps: with polylactic acid, citric acid ester compounds and natural antibacterial plant essential oil as raw materials, preparing a composite film through a solvent membrane method; carrying out thermal plastic package on the composite film according to the packaging amount, so as to prepare a bag-shaped packaging bag; putting the clean fresh mushroom into the packaging bag, wherein the mushroom loading amount is 50-80% of the volume of the packaging bag; filling in fresh air and then sealing; and storing in a refrigerator with the temperature being 6+/-1 DEG C. The preservation method is simple in process, and easy to operate; the used materials can achieve biodegradation, and reduce environmental pollution caused by package; due to addition of the natural antibacterial plant essential oil, according to the preservative film used in the preservation method, the mechanical property of the preservation film is improved, the breathability of the preservation film is increased and the preservative film is relatively suitable for modified atmosphere packaging of the mushroom; meanwhile, the preservative film also has certain bacteriostatic action, and is capable of restraining growth and reproduction of microorganisms; and the preservation method is capable of effectively prolonging the storage life of the mushroom.

The invention discloses a drainage pipe assembly applied to a refrigerator and the refrigerator having the same. The drainage pipe assembly comprises a pipe body, a drainage cover and a guide plate, wherein the top and the bottom of the pipe body are open to collect and drain the defrosted water of the refrigerator, the drainage cover is rotationally arranged at a lower end of the pipe body for sealing the bottom of the pipe body and configured in a way that the drainage cover can be opened when being subjected to impact force, and the guide plate is arranged in the pipe body for guiding the flow direction of the defrosted water so as to enable the defrosted water to produce the impact force on the drainage cover. According to the drainage pipe assembly provided by the invention, the drainage cover at the bottom of the pipe body is opened to drain the defrosted water when the refrigerator is in defrosting, and after the defrosting ends, the bottom of the pipe body is sealed by the drainage cover so as to prevent hot and moist air entering the refrigerator to increase the defrosting degree of the refrigerator; therefore, the refrigerating performance of the refrigerator is improved, the food preservation is also facilitated, meanwhile, the thermal load of the refrigerator is reduced, and the cost of use is low.

A free-standing, microwavable food container capable of being used for both high pressure processing (HPP) and microwave reconstitution of food products. The container is designed so as to be capable of being hand-held, even after microwave heating of the food products contained therein. The design of the container, coupled with the incorporation of the pressure release valve, enables the container to be used to both HPP preserve the food product and reconstitute the food product in the same container while retaining the original organoleptic properties of the preserved food, including taste, texture and appearance. A method of combining the high pressure processing of food products and microwave reconstitution in the stand-up container containing the pressure release valve is also described. Typical food products preserved include vegetables, proteins and/or carbohydrates, optionally coated or mixed with powdered, pellet or cube sauce or gravy.

The invention relates to a lactobacillus pentosus strain and a fermentation product of the same. The preservation number of the lactobacillus pentosus LPEM818 in the invention is CGMCC No. 4583 in the China General Microbiological Culture Collection Center. The fermentation product of the lactobacillus pentosus in the invention can inhibit common pathogenic escherichia coli, pseudomonas aeruginosa and staphylococcus aureus in food, and particularly has a strong inhibiting effect on listeria monocytogenes which can cause serious food poisoning. In addition, the metabolite of the strain also can inhibit the growth of aspergillus flavus and cotton and tomato blight pathogens. Consequently, the lactobacillus pentosus strain and the fermentation product thereof play an active role in the fields of food preservation and plant protection.

The invention belongs to the technical field of food preservation, and particularly relates to a composite preservative and an application method thereof. The composite preservative for meat comprises the following components in parts by weight: 2-5 parts of chitosan, 1-2 parts of tea polyphenol, 1-2 parts of green tea powder, 8-15 parts of Zanthoxylum bungeanum extract, 5-10 parts of Zanthoxylum bungeanum leaf extract, 15-20 parts of bamboo vinegar solution and 50-80 parts of water. The bamboo vinegar solution is a product prepared by cooling a vaporizing liquid which is obtained by heating and decomposing bamboo at high temperature. The composite preservative for meat adopts pure natural plant components, is free of antibiotics and conventional bactericides, and thus, is safe and environment-friendly in components; and after special proportioning, the product has broad-spectrum antimicrobial effect, and effectively inhibits the microbes from growth in the low-temperature preservation process of fresh pork and other meat products, thereby prolonging the storage time and shelf life of fresh meat.

The invention discloses a mobile unpowered energy-saving food preservation box which comprises a box body, a gas cycle preservation system, a remote data monitoring and global positioning system and a solar power generation electric power storage system; the cooling capacity circulating, nano purification, enzymatic inactivation dormancy preservation technology is adopted, the energy-saving rate is high, the solar energy is used for generating and storing the power, so that the food preservation box has the function of remote movement, unpowered self-survival long-term preservation. The invention further discloses a preservation method of the mobile unpowered energy-saving food preservation box, the method can dynamically monitor, adjust and control the preservation parameter at real time according to the movement longitude and latitude of the food by pre-cooling treatment and cooling capacity nano purification preservation, the food is guaranteed at the best preservation state. The unpowered cold chain preservation of the perishable fresh food for long distance movement can be achieved through the preservation box and the preservation method and the commercial value is great.