7results about How to "Maintain freshness" patented technology

The invention belongs to the field of agriculture, and particularly relates to a wild vegetable natural composite preservative and a preparation method thereof, the wild vegetable natural composite preservative is prepared from the following raw materials by weight: 0.6-0.9 part of a mixed flavone extract, 1-2 parts of L-malic acid, 2-3 parts of sodium lactate, 10-20 parts of a glucose solution, and 20-30 parts of glycerin. The natural composite preservative is prepared by adopting a method for extracting flavone from plants, and the prepared product is healthy and safe to use and has excellent preservative and fresh-keeping effects. L-malic acid is used as a pH regulator, so that the pH value of the preservative can be maintained in a proper range, the growth of microorganisms and the activity of enzymes are inhibited, and the preservation effect is further improved.

The application provides a wine aging method, and belongs to the technical field of wine brewing, which comprises the following steps: adjusting the sulfur content of separated base wine to obtain base wine with adjusted sulfur content; sterilizing oak barrels by steam fumigation; filling the base wine with adjusted sulfur content into the sterilized oak barrels to obtain full oak barrels; aging the full oak barrels, the humidity of the aging environment is 65RH%-75RH%, and the temperature of the aging is adjusted according to the season, and the full oak barrels are regularly adjusted in sulfur content during the aging process. The wine aging method provided by the application can regularly adjust the sulfur content of the wine liquid once every 28 days during the aging process, accurately supplement the content of key components in the wine liquid which is reduced due to natural consumption, and avoid the concentration of the components being lower than the appropriate interval of aging.

The invention discloses a freezing and unfreezing method of tilapia meat, which comprises the following steps: pretreatment of tilapia meat: slaughtering fresh tilapia, and uniformly slicing tilapia spine meat with the size of 5cm * 5cm * 2cm; preparing an anti-freezing agent: accurately weighing sodium tripolyphosphate accounting for 0.16% of the total mass of the tilapia fillets, sodium pyrophosphate accounting for 0.08% of the total mass of the tilapia fillets, sodium hexametaphosphate accounting for 0.12% of the total mass of the tilapia fillets and trehalose accounting for 4% of the total mass of the tilapia fillets Liquid nitrogen rapid freezing treatment: soaking the treated tilapia fillets in an antifreeze agent, then taking out the tilapia fillets, packaging the tilapia fillets with a sealing bag, placing the tilapia fillets in a tray, rapidly freezing the tilapia fillets with liquid nitrogen, and then placing the tilapia fillets in a freezer for freezing And carrying out unfreezing treatment in a stable and constant magnetic field: putting the tray in a-20 DEG C magnetic-field-free environment for unfreezing treatment for 24 hours, and then putting the tray in a stable and constant magnetic field environment for unfreezing. By adopting the antifreeze agent, the liquid nitrogen quick freezing technology and the steady magnetic field thawing technology, the juice loss rate is remarkably reduced, the color, the smell and other sensory characteristics, the elasticity and the hardness of the thawed tilapia meat can be effectively maintained, and the quality and the fresh degree of the tilapia meat can be maintained.

The utility model relates to the field of water -retaining agent soaking, relate to a water -retaining agent soaking device, the utility model discloses: frame, soaking tank, collection tank, baffle, drive mechanism and aeration component, the soaking tank is fixed on the frame, the soaking tank upper end is equipped with the feed pipe, the soaking tank bottom is equipped with the discharge gate, the baffle is slidably arranged on the frame and rear end is driven through drive mechanism, the baffle is located the lower end of discharge gate, the collection tank is located the below of discharge gate, the aeration component includes support, gas outlet pipe, pipeline and air pump, the gas outlet pipe is fixed on the lower end of support and is located in the soaking tank, the gas outlet pipe is distributed with the air hole, the pipeline upper end connects air pump, the pipeline lower end connects the upper end of gas outlet pipe, and the pipeline is arranged in the support inside.

This utility model relates to the field of leek baling technology and discloses a leek harvesting and baling machine, including a machine housing with a baling mechanism fixed on the housing; and a clamping assembly disposed on the machine housing, including a clamping member, the clamping member including a clamping plate located on the machine housing, the clamping plate having a through groove, a fixed shaft inserted into the through groove, and a rotating plate fixed to one side of the clamping plate. The beneficial effects of this utility model are: by setting up a leek clamping device, leeks can be directly placed between two clamping plates. Simply pressing a button allows the clamping plates to automatically approach and pre-clamp the leeks, replacing the tedious manual gathering operation. Simultaneously, the pre-clamping effect of the clamping plates increases the force-bearing area of ​​the leeks, evenly distributing the pressure on the leek surface, avoiding damage caused by excessive instantaneous pressure on a localized area, thereby improving the efficiency of the baling operation and maintaining the integrity and freshness of the leeks.

This utility model discloses a California bass farming pond, relating to the field of bass farming technology. The California bass farming pond includes a holding tank, a filter assembly, and a harvesting assembly. A connecting box is fixedly connected inside the holding tank. The bottom of the holding tank is hollow. The filter assembly and the harvesting assembly are located on the holding tank. The harvesting assembly includes an auxiliary rod, a threaded rod, a bending plate, a motor, and an arc-shaped plate. The threaded rod is rotatably installed on the inner bottom of the connecting box, and the auxiliary rod is fixedly connected to the inner bottom of the connecting box. This utility model can separate large and small fish and facilitate their harvesting. By separating large and small fish, it provides suitable space and environment for fish of different sizes, improving the growth rate and health of the fish, avoiding resource competition and pressure caused by size differences, and the structure facilitates harvesting, making operations more convenient and faster when pond management or harvesting is required.

The invention belongs to the technical field of fresh-keeping films, and provides an electret fresh-keeping nanofiber film as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing fluorine-containing organic matters, silver nanoparticles, water and an organic solvent to obtain a spinning solution; performing electrostatic spinning on the spinning solution to obtain micro-nano fibers, and depositing the micro-nano fibers on base cloth to obtain the electret fresh-keeping nanofiber membrane. Compared with an electret antibacterial preservative film of the same type, the electret preservative nanofiber film has antibacterial performance and high air permeability and light transmission, and the appearance and freshness of food can be maintained; better chemical stability and environmental adaptability are achieved, and the method is not affected by the use environment in general; the charges of the electret preservative film can be self-recovered, and the electret preservative film has certain charge recovery performance when used in an environment with the humidity of 30-90%, so that the antibacterial performance is greatly improved, and the service life of the electret preservative film is greatly prolonged.