35results about How to "Reduce weight loss" patented technology

The invention discloses a master batch with a food fresh-keeping function. The master batch comprises the following components: 40-80 parts of PE resin; 5 to 30 parts of a nano composite antibacterial agent; 0.1 to 5 parts of a surfactant; 2-10 parts of a polyolefin elastomer; 5-25 parts of an organic gas adsorption material; 5-20 parts of a microporous modified atmosphere material; 1-25 parts of an antifogging agent; 0.1 to 10 parts of a lubricant; 0.1-5 parts of a dispersant; 0.1 to 1 part of an antioxidant; 0.1 to 3 parts of absolute ethyl alcohol; and 80 to 300 parts of ultrapure water. The master batch with the food fresh-keeping function has a broad-spectrum antibacterial effect, can reduce the rotting rate, the weight loss rate and the loss rate of fruits and vegetables in the production circulation link, adsorbs organic gas generated by respiration of the fruits and the vegetables, spontaneously adjusts the gas concentration content, and prolongs the fresh-keeping time and the shelf life of the fruits and the vegetables.

The invention relates to the field of fruits, in particular to a composite film for fruit preservation and a preparation method and application thereof. The invention provides a composite film for fruit preservation. The composite film comprises the following preparation raw materials: prodigiosin and a film forming substrate, the film-forming substrate comprises chitosan and a high-molecular compound; the high-molecular compound is corn starch or polyvinyl alcohol. Compared with a composite film without addition of prodigiosin, the composite film provided by the invention can delay the weight loss rate, the rotting rate, the titratable acid content and the vitamin C content of the fruits, can effectively retain nutrient substances of the fruits, and prolongs the storage period of the fruits.

The invention discloses a planting method of selenium-rich cherries. The planting method comprises the following steps that selenium-containing fertilizer is applied to soil in a flushing mode when tree bodies germinate at the end stage of a dormancy period; in the flowering stage, nitrogen-phosphorus-potassium balanced fertilizer is applied, and the synergist composition and the selenium-enriched nutritional agent are sprayed on leaf surfaces at intervals; and spraying the synergist composition and the selenium-rich nutritional agent on leaf surfaces at intervals for multiple times in a fruit swelling period. The synergist composition disclosed by the invention is prepared from the following components: polyoxyethylene fatty alcohol ether, polyether modified organic silicon, natural plant saponin, chitosan oligosaccharide, alginic acid, hydrolyzed collagen and the like. The selenium content of the cherry fruits cultivated by the method can reach 0.078-0.082 mg / kg, after the cherry fruits are stored for 15 days, the hardness of the fruits is maintained at 65-68.5 N / cm < 2 >, the weight loss rate is controlled at 4.0-4.5%, the rotting rate is controlled at 3.2-3.8%, the retention rate of vitamin C reaches 83-86%, and the storage period is prolonged by 3-4 days compared with that of conventional cultivation. The method is easy to operate, low in cost and high in applicability, and the quality and storage performance of the cherry fruits can be remarkably improved.

According to the method for prolonging the fresh-keeping period of the fruits by using the controlled atmosphere fresh-keeping box, the controlled atmosphere fresh-keeping box is prepared by improving the sealing performance of a common fresh-keeping box and covering a certain area of the common fresh-keeping box with a film, and the fruits are put into the box to be stored. When the area of the covering film is 20%, the lotus seeds are stored in a box, and 1-methylcyclopropene can be added; when the area of the covering film is 34.8%, the longan is placed in a box to be stored. Compared with the control, the modified atmosphere preservation box treatment can reduce the weight loss rate and browning degree of the lotus seeds and maintain the contents of Vc, amylose, total phenols and soluble solids; compared with a control group, the modified atmosphere preservation box treatment can inhibit browning of longan peel, delay reduction of soluble solids, acidity and vitamin C, inhibit increase of malondialdehyde content, reduce peroxidase activity and improve catalase activity and glutathione content. According to the technology, the shelf life of the fruits can be effectively prolonged, and the problems that an existing fresh-keeping method is tedious and short in fresh-keeping period are solved.

The invention relates to the technical field of animal breeding feeds, in particular to a healthy and efficient compound feed based on Canadian sows and a preparation method. The invention provides a healthy and efficient compound feed based on Candida sows. The healthy and efficient compound feed is prepared from a basic energy protein raw material, a fermentation raw material, an acidifying agent, exogenous functional amino acid, a premix and auxiliary materials. The healthy and efficient compound feed disclosed by the invention can reduce the backfat loss of the Candida sows and prolong the high-farrowing reproductive performance.

The application discloses methyl ferulate-grapefruit essential oil nanoemulsion as well as a preparation method and application thereof, the preparation method comprises the following steps: dissolving methyl ferulate in grapefruit essential oil to obtain an oil phase, adding Tween 80 and water into the oil phase in sequence, stirring to obtain a coarse emulsion, and then treating the coarse emulsion through ultrasonic treatment to obtain the methyl ferulate-grapefruit essential oil nanoemulsion. The preparation process is simple, convenient, green and safe, methyl ferulate and grapefruit essential oil can be co-stabilized in a nano system, the water solubility and dispersity of methyl ferulate are improved, and the obtained methyl ferulate-grapefruit essential oil nanoemulsion can be used for inhibiting alternaria alternata and alternaria alternata toxin and preserving fruits such as pears, cherry tomatoes and jujube fruits.

The invention provides a young citrus fruit health-care food for weight management and a preparation method thereof, the young citrus fruit health-care food for weight management comprises the following components in parts by weight: 15 parts of young citrus fruit powder, 10 parts of excipient and 10 parts of first flavoring agent; 30 to 50 parts of an excipient; the content of the first flavoring agent is 16.5 to 27.5 parts. According to the method disclosed by the invention, the two components of citrus polyphenol and synephrine in the young citrus fruits can be reserved to the greatest extent. Citrus polyphenol contained in the citrus functional chewable tablet can inhibit fat digestion activity and inhibit absorption of fat food by a human body, synephrine can cause vasoconstriction, blood pressure rise and bronchial muscle relaxation, stimulate lipolysis and improve the metabolism rate and oxidation degree of fat by increasing the heat generation effect, and the fat digestion activity can be inhibited. Under the condition of normal diet, energy intake and fat decomposition are effectively reduced, so that the effect of reducing body weight can be achieved.

The invention relates to the field of composite soft plastic packaging, in particular to a dynamic self-repairing type high-toughness bio-based degradable film and a preparation method and application thereof. The film is composed of a lactic acid high polymer, a copolymer of butylene adipate and butylene terephthalate, a compatibilizer, a nucleating agent, a catalyst, an auxiliary agent and an antibacterial agent, the catalyst is formed by mixing a main catalyst and a co-catalyst, the main catalyst comprises any one of zinc acetylacetonate, ferric acetylacetonate, antimony trioxide and zinc oxide, and the co-catalyst comprises any one of zinc acetylacetonate, ferric acetylacetonate, antimony trioxide and zinc oxide. The cocatalyst is selected from any one of triethylamine, triphenylphosphine and aluminum acetylacetonate. The invention provides an effective scheme for solving the core contradiction that the strength, toughness, repairability and controllable degradability of a bio-based material are difficult to consider at the same time, is expected to replace traditional plastics in the fields of high-end environment-friendly packaging, intelligent agricultural mulching films and the like, and has great environmental benefits and industrialization prospects.

This invention relates to austenitic stainless steel. According to the invention, by adding inexpensive carbon (C) and nitrogen (N) elements, the cost is lower than that of conventional 304STS and 316STS, and weight loss is reduced in immersion testing (ASTM G48-11). Furthermore, the impact absorption energy at approximately -196°C can be at least 41 J.

This invention provides a thermoplastic lightweight continuous fiber composite material, its preparation method, and its application. The preparation method includes: preparing layers cut to the required size and stacking them sequentially; obtaining the thermoplastic lightweight continuous fiber composite material through pressurization, temperature control, and machining. On one hand, the outer surface of the composite material is a woven or unidirectional PBO fiber layer. The molded product is sprayed with a transparent varnish to retain the golden color and fiber texture of the PBO fibers. On the other hand, the intermediate foam layer can reduce the amount of continuous fiber used, thereby reducing costs and weight. Moreover, the unidirectional or woven carbon fiber / glass fiber impregnated with thermoplastic resin is combined with PBO fibers. Based on the required characteristics and the designed thickness and strength, the type and quantity of the carbon fiber layer and / or glass fiber layer impregnated with thermoplastic resin on both sides of the intermediate foam layer are determined to maximize the strength of the board.

The invention relates to a method for prolonging shelf life of agricultural products by using a BOPE (biaxially oriented polyethylene) film, which is characterized in that PE (polyethylene) and BOPE film packaging are respectively applied to fresh tomato fruits (breathing climacteric change) and strawberry fruits (non-breathing climacteric change), the weight loss ratio, malondialdehyde and oxidation trend of the fruits are obviously reduced, and the activity of antioxidant enzyme POD (peroxidase) is obviously improved. The weight loss ratio of the strawberries packaged by the BOPE film is lower than that of a control group at the end of the storage period, the hardness and the soluble solid content of the fruits are higher than those of the control group, and the phenomena of aging, water loss, hardness and soluble solid (TSS) reduction of the harvested strawberries in the storage process are effectively delayed. The weight loss ratio of the tomato fruits packaged by the BOPE film is obviously reduced compared with that of a control group, and a good effect is achieved in the aspects of keeping the hardness and the soluble solid content of the fruits.

The present invention discloses a battery transfer device and a battery swap station including the same. The battery transfer device is arranged near a battery rack having a plurality of battery racks for storing batteries. The battery transfer device includes a support mechanism arranged adjacent to the battery rack, a battery pick-and-place mechanism for picking and placing batteries relative to any battery position of the battery rack, and a transmission mechanism for driving the battery pick-and-place mechanism to move up and down. The top and bottom of the support mechanism are respectively fixed to the top and bottom of the battery swap station as an integrated structure through a top connection unit and a bottom connection unit. The battery transfer device improves operational stability and reliability by connecting the top and bottom of its support mechanism to the battery swap station through a top connection unit and a bottom connection unit. At the same time, the battery swap station can help the support mechanism of the battery transfer device share part of the load, so that the structural strength requirement of the support mechanism itself is reduced, and the structure and material thickness of the support mechanism can be simplified to achieve the purposes of reducing costs and weight.

The application discloses a kind of CL-AuNPs@CD-MOF / Zein-PLA antibacterial films and preparation method and application thereof.The application is prepared gold nanoparticle (AuNPs) by green synthesis strategy, with CD-MOF as stabilizer, p-coumaric acid (p-CA) as natural reducing agent, by reducing tetrachloroauric acid (HAuCl4), CD-MOF is obtained by covalent crosslinking modification CL-AuNPs@CD-MOF with diphenyl carbonate (DPC), finally it is introduced into corn alcohol-soluble protein (Zein)-polylactic acid (PLA) composite film, utilize Zein excellent oxygen barrier property and PLA excellent mechanical property mutual coordination, construct the respiration microenvironment with suitable water vapor and oxygen permeability, so as to effectively inhibit the proliferation of microorganism on the surface of agaricus bisporus, and maintain its sensory quality.The composite film has significantly enhanced water stability, realizes the sustained release of gold nanoparticles, can effectively inhibit the microbial infection of agaricus bisporus after harvest.

The invention discloses an application of a compound salimusk in bacteriostasis and preservation of strawberries, starting from botryis cinerea which is a main pathogenic bacterium after strawberry fruits are picked, and the bacteriostasis effect of the salimusk on the botryis cinerea is studied. The saxellik belongs to important natural musk, contains terpene and alcohol as main components, and has biological activities such as antibacterial activity, anti-inflammatory activity and anti-oxidation activity. Experiments show that the salimusk can effectively inhibit mycelial growth and spore germination. And the destroying effect of the salimusk on fungal spores is deeply explored by observing the microstructure of the tested strain. The strawberry fresh-keeping agent can effectively delay reduction of weight and hardness and nutrient loss in the strawberry storage process, and is good in fresh-keeping effect. Results show that the salimusk has the potential to replace existing chemical bactericides, and a theoretical basis is provided for development of novel antibacterial preservatives.

The utility model belongs to the technical field of kitchen appliances, and discloses a pressure cooking utensil which comprises a heat preservation cover, a heating disc arranged in the heat preservation cover and an elastic piece located between the heat preservation cover and the heating disc, the elastic piece is provided with a positioning hole, the heating disc is provided with a positioning column, and the positioning column comprises a body penetrating through the positioning hole and a contact part. And when the elastic sheet is pressed to deform, the contact part is in linear contact with the elastic sheet. According to the pressure cooking utensil, uniform stress is generated when the elastic piece is stressed, the service life of the elastic piece is prolonged, the fatigue resistance of the elastic piece is guaranteed, then the service life of the pressure cooking utensil is prolonged, and the use experience of a user is improved; the deformed elastic sheet is in linear contact with the contact part, so that the contact area of the elastic sheet and the contact part is increased, the pressure between the elastic sheet and the contact part is reduced, the abrasion to the contact part is reduced, the stress position of the elastic sheet is kept unchanged, the stability of the elastic sheet is improved, and the service life of the elastic sheet is prolonged.

This invention discloses a traditional Chinese medicine composition for treating ulcerative colitis, its preparation method, combined drugs, and applications. The traditional Chinese medicine composition for treating ulcerative colitis of this invention is made from the following raw materials in parts by weight: Astragalus membranaceus 13-26 parts, Lonicera japonica 10-20 parts, Sargentodoxa cuneata 10-20 parts, Prunus mume 8-16 parts, Agrimonia pilosa 8-16 parts, Allium macrostemon 6-12 parts, Platycodon grandiflorus 6-12 parts, Coptis chinensis 3-6 parts, and Panax notoginseng powder 1-3 parts. An animal model of ulcerative colitis was constructed using DSS induction, and the results showed that the traditional Chinese medicine composition of this invention has a certain therapeutic effect on ulcerative colitis. Clinical studies showed that the traditional Chinese medicine composition of this invention, used in combination with mesalazine enteric-coated tablets, can reduce the modified Mayo score and serum inflammatory markers in patients with active ulcerative colitis, improve colonic mucosal inflammation and gastrointestinal symptoms, and effectively treat active ulcerative colitis of the damp-heat type.

The invention relates to a fruit coating composition. The invention also relates to a fruit coating method, comprising the post-harvest application of a coating composition to said fruit. The invention further relates to a fruit coated according to said method. The invention also relates to the use of a coating composition for preparing a post-harvest fruit with improved gloss when coated with said composition compared to a fruit not coated with said composition, and / or slower weight loss compared to a fruit not coated with said composition.

The invention provides a method for preserving cherry tomatoes through combination of a low-voltage electrostatic field and modified atmosphere packaging and application of the method, and belongs to the technical field of preservation. The method comprises the following steps: pre-cooling cherry tomatoes, packaging the cherry tomatoes with a modified atmosphere packaging material, treating the cherry tomatoes in a low-voltage electrostatic field after packaging, and storing the cherry tomatoes. The low-voltage electrostatic field treatment is combined with the packaging treatment, so that the respiration rate can be reduced, and the gas environment in the package can be changed, thereby reducing the consumption of nutrient substances caused by respiration, improving the capability of cherry tomatoes for removing active oxygen, inhibiting membrane lipid peroxidation, reducing the accumulation of malondialdehyde, enhancing the antioxidant level and delaying the maturation and aging of the picked cherry tomatoes; the fresh quality of the cherry tomatoes is effectively maintained.

The invention discloses a soybean protein isolate / gelatin packaging film containing eucalyptus leaf essential oil nanoemulsion. The method comprises the following steps: firstly, embedding eucalyptus leaf essential oil by using a low-temperature ultrahigh-pressure continuous flow cell crusher to prepare eucalyptus leaf essential oil nanoemulsion, adding the eucalyptus leaf essential oil nanoemulsion into a soybean protein isolate / gelatin / glycerol mixed solution, magnetically stirring, and drying in a constant-temperature and constant-humidity box to obtain the eucalyptus leaf essential oil nanoemulsion / soybean protein isolate / gelatin packaging film. The eucalyptus leaf essential oil nanoemulsion is applied to the soybean protein isolate / gelatin composite membrane, the antibacterial and antioxidant effects of the eucalyptus leaf essential oil nanoemulsion are exerted, the eucalyptus leaf essential oil serves as a cross-linking agent, the internal structure of the membrane is more compact, the tensile strength and the elongation at break of the composite membrane are improved, the water vapor permeability and the oxygen permeability are reduced, and the service life of the membrane is prolonged. The synergistic advantage of the eucalyptus leaf essential oil is exerted, and the components have good compatibility, so that the membrane has better thermal stability. Cherry fresh-keeping experiments prove that the composite film has an obvious fresh-keeping effect on cherries.

The invention discloses application of mesenchymal stem cells derived from an in-vivo stem cell generator. The mesenchymal stem cells are used for preparing drugs for treating inflammatory diseases, especially inflammatory enteritis. According to the method, an artificial controllable inflammatory microenvironment is constructed in vivo through a stem cell generator, so that the immune regulation function of the mesenchymal stem cells is activated, and the activated MSC can effectively promote phenotype conversion from M1 type macrophages to M2 type macrophages, induce T cells to be differentiated into regulatory T cells and inhibit proliferation of the activated T cells. In the treatment of mouse inflammatory bowel disease, the MSC obtained by the method disclosed by the invention obviously improves the survival rate of mice, relieves weight loss, retains a relatively complete crypt structure of a colon part, inhibits infiltration of inflammatory cells to the colon, and rebuilds an inflammatory microenvironment of the colon. The invention provides a brand new method for activating the immunomodulatory function of the mesenchymal stem cells, and a new path is opened up for treating inflammatory and immune diseases.

The invention relates to the technical field of grape storage and fresh-keeping processes, in particular to a grape storage and fresh-keeping process based on microorganisms, which comprises the following steps: (1) pretreating grapes; (2) preparing a microbial culture solution; (3) preparing a preservative formula; (4) treating with a preservative; (5) packaging and storing, so that the storage period of the grapes is remarkably prolonged from traditional 3-4 weeks to 6 weeks or above, and meanwhile, relatively high sensory quality is kept; the growth of harmful microorganisms is effectively inhibited, and the total bacterial count and the mould yeast count are only increased to 2.69 and 2.18 lg CFU / g respectively after 6 weeks; the weight loss rate is obviously reduced, is only 3.08% after 6 weeks, and is 50% or above lower than that of a control group; the fruit hardness is effectively maintained, and the fruit hardness is still maintained at 3.52 N after 6 weeks; the retention rate of vitamin C is high, can still reach 90.2% after 6 weeks and is 30% or above higher than that of a control group; the overall sensory quality is excellent, and the overall acceptance score after 6 weeks reaches 8.0.

The invention belongs to the technical field of nuclear power mechanical equipment pressure boundary flange sealing, and discloses a steam generator manhole self-tightening sealing structure and a method for changing forced sealing into self-tightening sealing. The sealing structure comprises an end pressing ring, a floating top cover, a quadruple ring, a restraining ring and a wedge-shaped pad, the restraining ring serves as a supporting structure of a restraining bolt and a restraining nut, the end pressing ring, the quadruple ring and the restraining ring interact to provide restraining loads, the floating top cover is tensioned to extrude the wedge-shaped pad, and the wedge-shaped pad deforms to generate elastic potential energy so as to obtain sealing specific pressure. According to the method, a pressing ring assembly, a wedge-shaped pad, a floating top cover, a restraining ring and a tensioning assembly are installed on a manhole flange body, and the wedge-shaped pad is extruded by tensioning the floating top cover so that the wedge-shaped pad can deform to generate elastic potential energy. The steam generator manhole sealing structure is suitable for a current steam generator manhole sealing structure, the safety and reliability of steam generator manhole sealing and the use and maintenance convenience are improved, and the production economy of full-period use and maintenance of a steam generator is improved.

The invention provides a bio-based composite film coating liquid for egg preservation, and a preparation method, a use method and application thereof. The bio-based composite film coating liquid comprises a nanocellulose solution, coconut oil, cinnamyl aldehyde, sophorolipid and glycerol. The preparation method comprises the following steps: mixing and stirring a nanocellulose solution and coconut oil under a water bath heating condition to obtain an intermediate solution; adding cinnamyl aldehyde, sophorolipid and glycerol into the intermediate solution, and stirring at a high speed to obtain the bio-based composite coating liquid. The bio-based composite coating liquid for prolonging the shelf life of eggs stored at normal temperature is prepared from the nano cellulose solution, the coconut oil, the cinnamyl aldehyde, the sophorolipid and the glycerol as raw materials, and a film layer formed after the bio-based composite coating liquid is sprayed on the surfaces of the eggs to form a film has excellent barrier property and antibacterial property; after the bio-based composite coating liquid provided by the invention is sprayed on eggs, the eggs can be kept at the quality of grade A or above for at least four weeks.

The application discloses a fresh-keeping agent for preventing durian cracking and a preparation method thereof, and mainly relates to the technical field of fruit preservation. Compared with the prior art, the fresh-keeping agent is prepared from chitosan as a main component, and is synergistically combined with acetic acid, polyglutamic acid, sodium alginate, sorbitol, plant polyphenol nano-particle emulsion and compound glue such as konjac gum, carrageenan and xanthan gum, and the plant polyphenol nano-particle emulsion obtained by a special preparation method is further added. When the fresh-keeping agent is applied to the surface of durian, a layer of fresh-keeping film is formed, and the technical problems of improving water-locking performance and puncture resistance, reducing weight loss rate, preventing durian cracking and prolonging the fresh-keeping period are finally solved.

The invention provides a jujube leaf epidermis wax-protein composite membrane as well as a preparation method and application thereof. The composite film is prepared from raw materials including vegetable protein and jujube leaf epidermis wax. Wherein the mass percentage content of the jujube leaf epidermis wax can be 0-2.5%. According to the prepared jujube leaf epidermis wax-protein composite film, one of the raw materials, namely wax, comes from jujube leaves, the materials are safe and non-toxic, and the resource utilization rate of the jujube leaves can be increased; the obtained jujube leaf epidermis wax-protein composite film has excellent waterproofness, antibacterial activity and oxidation resistance, is used for coating preservation of picked blueberries, has slight influence on sensory quality of the blueberries, and meanwhile, obviously reduces weight loss rate and rotting rate of blueberry fruits during storage, effectively delays softening of the fruits and improves preservation quality of the blueberries. The loss of nutrient substances such as soluble solids, anthocyanin, vitamin C and titratable acid is reduced, and the overall quality of the blueberries in the storage period can be effectively maintained. The invention has the advantages of low production cost and no burden on the environment after use.

The invention belongs to the technical field of biological medicines, and particularly relates to application of lactobacillus-derived extracellular vesicles in prevention and / or treatment of lung injury and / or intestinal injury. The extracellular vesicles (LrEVs) derived from lactobacillus reuteri are extracted from a culture solution of lactobacillus reuteri, and have a bubble-shaped structure of a nano-sized double-layer membrane. The LrEVs synchronously reduce excessive secretion of proinflammatory factors in lung and small intestine tissues of a body, and pathological injury is relieved; meanwhile, imbalance and activation of innate lymphocyte subpopulations in the lung and the small intestine of the body are synchronously regulated, the immune homeostasis of the body is maintained, the weight loss of the body is delayed, and the survival rate of the body is improved. That is, the LrEVs has a one-drug double-target characteristic, shows that the LrEVs synchronously have a remarkable treatment effect on the lung injury and the intestine injury, and can be used for developing drugs or healthy functional foods to prevent and / or treat the lung injury and / or the intestine injury.

The present invention provides a structurally stable battery swap station, which includes a battery rack having a plurality of battery slots for storing battery packs and a battery transfer device for transferring batteries between the battery slots. The battery transfer device is located between the battery rack and the corresponding side wall of the battery swap station. The battery transfer device has a mounting portion for mounting a transfer main body, and the mounting portion is fixed to the frame of the battery swap station and / or the battery rack as an integrated structure. With the above-mentioned structural arrangement, by fixing the battery transfer device to the frame of the battery swap station or the battery rack as an integrated structure, the impact generated by the operation of the battery transfer device can be transmitted and dispersed, thereby improving the operational stability and reliability, and reducing the structural strength requirements of the mounting portion itself, thereby simplifying the structure and material thickness of the mounting portion, thereby achieving the purposes of reducing costs and weight. Moreover, the mounting portion, the battery rack and the frame of the battery swap station can reinforce each other, making the structure of the battery swap station more stable.

The application discloses a Janus active composite film and a preparation method and application thereof, and relates to the technical field of food packaging. The method is used for preparing the Janus composite film by taking pectin as a hydrophilic layer, ethyl cellulose as a hydrophobic layer and chitosan as an intermediate adhesive layer. In the film, the pectin in the hydrophilic layer can adsorb fruit respiratory moisture and release the active substance citral, so that the antibacterial and antioxidant functions are realized; the chitosan in the intermediate layer has the function of an adhesive, so that the composite film is connected more closely; and the ethyl cellulose in the hydrophobic layer can effectively block the invasion of external water vapor, air and bacteria. The asymmetric structure has excellent water locking function and can significantly inhibit fruit weight loss. The preservation method is simple and safe, can delay fruit ripening and prolong the shelf life, and has a wide application prospect.

The invention provides a fresh-keeping method for prolonging the storage period of picked cistanche and reducing the loss of nutritional ingredients, which is characterized by comprising the following steps: pre-cooling the picked fresh cistanche, soaking in hot water in combination with short-wave ultraviolet irradiation, and storing in a low-temperature environment. The method has the beneficial effects that the fresh cistanche is taken as a raw material, and the aim of prolonging the storage period of the picked cistanche is fulfilled through combined application of heat treatment, short-wave ultraviolet irradiation and low-temperature storage after the fresh cistanche is selected and pre-cooled. The method is low in price, simple and convenient to operate, free of residues, green, safe and environment-friendly, the storage period of the fresh cistanche deserticola can be prolonged to 80 days, and the stability of the overall quality and flavor in the low-temperature storage process of the fresh cistanche deserticola can be well kept.