51results about How to "Simple preservation method" patented technology

The invention discloses a gas mixture for keeping freshness of a fresh barbary wolfberry fruit and a fresh keeping method of the fresh barbary wolfberry fruit. The gas mixture for keeping freshness of the fresh barbary wolfberry fruit is composed of the following components by weight percentage: 85-96% of nitrogen, 1-10% of carbon dioxide and 1-6% of oxygen. The fresh keeping method of the fresh barbary wolfberry fruit comprises the following steps: putting the fresh barbary wolfberry fruit in a packaging container, introducing the gas mixture into the packaging container and storing at the temperature of 4 DEG C. By adopting the gas mixture provided by the invention, the freshening time of the fresh barbary wolfberry fruit is prolonged; the fresh barbary wolfberry fruit can be stored in the gas mixture for 3-4 days under room temperature and can be at least stored for 20 days at the temperature of 4 DEG C.

The invention relates to a cowpea fresh-keeping agent and a method for keeping cowpea fresh by the cowpea fresh-keeping agent. The fresh-keeping agent is prepared by adding 1.0-1.5 g of sodium alginate, 2-3 g of citric acid, 1-2 g of ascorbic acid and 0.5-1 g of procyanidine in 1 kg of pure water or cool plain boiled water sequentially, and stirring while adding, wherein the later agent is added after the former agent is completely dissolved, until the agents are completely dissolved. The method for keeping cowpea fresh by the cowpea fresh-keeping agent comprises the following steps: removing impurities from the fresh cowpeas, washing and drying the cowpeas, soaking the cowpeas for 10 min with a chlorine dioxide solution with the concentration of 150 ppm, then fishing up the cowpeas and drying, placing the cowpeas into 50 DEG C hot water to be treated for 3-5 min, cooling in pure water, and fishing up the cowpeas and drying, placing in the fresh-keeping agent to soak for 5-10 min, fishing up the cowpeas and drying, packaging the cowpeas by a polyvinyl chloride film, and storing at 8-12 DEG C. The raw materials for the fresh-keeping agent are easy to obtain; the fresh-keeping method is simple and feasible; and the cowpea fresh-kept by the method can be kept fresh for 21-25 days.

The present invention relates to a preservation method of grapefruits and belongs to the technical field of fruit preservation. The preservation method comprises the following steps: rice and rice bran are used as raw materials, the rice and rice bran are respectively subjected to mildewing and de-mildewing treatment to obtain modified rice and modified rice bran, then Chinese herbal medicines of litsea cubeba leaves, etc. are subjected to ultrasonic extraction, natural preservative organic substances of oils, phenols, etc. in the Chinese herbal medicines are extracted, the modified rice and the modified rice bran are used as a carrier, the modified rice and the modified rice bran adsorb the natural preservative substances, roasting is conducted, the roasted materials are smoked, smoked gas is collected, and the smoked gas and the grapefruits are placed into a vacuum bag for sealing treatment, so that the smoked gas can penetrate into the grapefruits and a layer of dense protective film is formed between the grapefruit skins and flesh to reach the preservation purpose. The preservation method is good in the preservation effect on the grapefruits, water is not reduced with the increase of the preservation time, and the grapefruits are long in the preservation time and can be stored and preserved for 3-4 months. The natural preservation substances are used, toxic substances do not remain, and harm to human body health does not be caused.

The invention discloses an outdoor gallery type storage and fresh keeping method of fresh ginger. The outdoor gallery type storage and fresh keeping method of fresh ginger comprises the following steps of firstly, digging a bar-shaped gallery under the floor of the flat ground, wherein vent pipes are arranged in the bar-shaped gallery, and a simple shack is built above the bar-shaped gallery; and then, selecting ginger blocks which are tidy in size, good in quality and free from diseases, enabling the selected ginger blocks to be piled in a layered manner in the bar-shaped gallery, and finally, enabling the surface of the ginger on the top layer to be covered with a thermal insulation layer of which the thickness is adjustable. The fresh keeping method disclosed by the invention is simple and easy to operate, not only has the advantages of being energy-saving, reducing consumption, and being low in costs, simple in material selection, labor-saving, time-saving, safe and suitable for use and high in maneuverability, but also is simple and convenient to manage during storage, and long in fresh-keeping time of the fresh ginger. The product quality and the fresh degree of the stored fresh ginger can be completely guaranteed, the rot rate of the fresh ginger is effectively reduced, the storage loss of the ginger blocks is reduced, the added value of the fresh ginger and the income of ginger planters are increased, and the generalization, the popularization, the implementation and the application of the fresh keeping method by the ginger planters are facilitated.

The invention relates to a preservation method of vegetable sweet potato stem apexes. The method comprises the following steps: collecting stem apexes of which the branch length is 8-10cm, aligning, bundling the stem apexes (0.2-0.3kg / bundle), and piling the bundled stem apexes in an open gap-bearing plastic crate; transferring the stem apexes into a refrigerator, and precooling for 12-18 hours, wherein the preset temperature of the refrigerator is 8-12 DEG C; transferring the stem apexes into a closed environment, and fuming with 0.5-2.0 mu L / L 1-methylcyclopropene gas for 18-24 hours; transferring the stem apexes into the refrigerator, and cooling for 12-24 hours, wherein the preset temperature of the refrigerator is 4-6 DEG C; and finally, putting the stem apexes into special preservation bags with the thickness of 0.05mm (1-5kg / bag), tightening the bag openings, and storing in a 4-6-DEG C refrigerator to the end. The method can prolong the preservation period of the stem apexes from 2-4 days in the normal state to 7-12 days, and is capable of obviously postponing the yellowing and rotting of the stem apexes, lowering the loss of the nutrients and keeping the freshness.

The invention discloses a method of pure-natural fresh keeping of lemon. The method includes the following steps: picking healthy and matured lemons in a complex shear manner and allowing the lemons to stand in field for several hours; 1) soaking the lemons in a preservation solution, which is prepared by squeezing fresh lemon and diluting the lemon juice by 300-1000 times, and adding sucrose until the concentration is 10-30 wt%; 2) air-drying the lemons, and coating the lemons individually by polyethylene fresh keeping film and storing the lemons indoor. The fresh keeping method is safe, simple, practical and low-cost, has good fresh keeping effect and can effectively delay senility of the lemons and maintain the quality of the lemon, and is suitable for promotion and application. The fresh keeping method can greatly alleviate color change, water loss and internal quality change of the lemons during storage, maintains the freshness of the lemons and prolongs the shelf life and fresh-keeping time of the lemons as most as possible.

The invention discloses a modified atmosphere packaging method of chilled fresh pork. The technological process of the method includes sequentially subjecting domestic animals to upside hanging, killing, bleeding, peeling, lymph removing, carcass finishing and weight checking; cleaning lumens, and performing bristle picking, cutting, deboning and fresh meat cutting; spraying a 3%-5% of a lactic acid solution on the surface of the meat and then discharging acid; performing packaging by using a modified atmosphere mode; and performing sesame freezing for 7-10 minutes, performing irradiating with 1.0myqd of Cc<60> and refrigerating, wherein the matching ratio of gas volume is 25% of CO2, 50% of O2 and 25% of N2, the temperature of sesame freezing is not higher than -40 DEG C and not lower than -20 DEG C, irradiation time of a packing size below 10<-3> m<-3> is not larger than 0.8-1 hour, and volume irradiation time of a packing size of 1*10<-3>-3*10<-3> m<3> is not larger than 1.5-2 hours. The method is simple, good in fresh preservation effect, low in cost, long in fresh preservation time, free from influencing qualities of meat and capable of effectively reducing damage of chemical preservative to human bodies.

The invention relates to a method for keeping freshness of seed melons, which comprises the following specific steps: a, sterilizing: sterilizing a freshness-keeping storehouse before storing the seed melons; b, selecting the seed melons: selecting the seed melons which are late-maturing in late August and early September, good in appearance and free from external injury and plant diseases and insect pests in the growth period, preserving 4-5 cm of stem, and storing in the freshness-keeping storehouse; c, placing: putting on a shelf in a manner of downwardly placing melon belly and upwardly placing melon back, and placing 2-3 layers of seed melons on each layer of shelf; d, ventilating: opening a window of the freshness-keeping storehouse, ventilating for 5-7 days, closing the window, and keeping at normal temperature till early November; and e, controlling temperature and humidity: beginning to keep the temperature in the middle of November, closely building the window by using a soil blank, heating for 1-2 h every day, controlling the temperature of the freshness-keeping storehouse at 8-11 DEG C, and controlling the humidity at 75-80%. The method for keeping freshness of the seed melons disclosed by the invention is simple and easy to operate, good in freshness-keeping effect and high in commodity; the freshness-keeping period of the seed melons can achieve 5-6 months; the original quality and taste of the seed melons are basically kept; the construction cost of the freshness-keeping storehouse is low, so that energy is saved; and the method for keeping freshness of the seed melons disclosed by the invention is applied to being popularized in the countryside.