1349results about "Fruit and vegetables preservation" patented technology

The invention discloses an antibacterial peptide and application thereof, and belongs to the technical field of biology. The antibacterial peptide with an inhibition effect on various clinically common pathogenic microorganisms is obtained, and the antibacterial peptide comprises gram-negative bacteria such as escherichia coli, klebsiella pneumoniae, pseudomonas aeruginosa, acinetobacter baumannii, vibrio parahaemolyticus, salmonella gallinarum, salmonella typhimurium and enterobacter sakazakii, and gram-positive bacteria. The antibacterial peptide provided by the invention can be used as an antibacterial peptide, such as staphylococcus aureus, listeria monocytogenes and bacillus cereus, and the antibacterial peptide provided by the invention is novel in structure and easy to prepare.

The invention relates to bacillus subtilis, a biocontrol inoculant prepared from the bacillus subtilis and application of the biocontrol inoculant, and belongs to the technical field of biological inoculants. The bacillus provided by the invention is bacillus subtilis and is named as KC2, the preservation unit is China General Microbiological Culture Collection Center, the preservation address is Institute of Microbiology, Chinese Academy of Sciences, No.3, No.1 Yard, Beichen West Road, Chaoyang District, Beijing, the number of the preservation center is CGMCC No.31372, and the preservation time is July 19, 2024. The bacillus KC2 disclosed by the invention has a certain bacteriostatic effect on different pathogenic bacteria regardless of living bacteria, supernate or cell lysis solution. The bacillus KC2 is high in living ability and wide in application range of nutrient sources, temperature, humidity and pH value. The compound has no pathogenicity to fruits and vegetables, has good tolerance to broad-spectrum bactericides, and has a great application prospect.

The invention discloses bacillus amyloliquefaciens GX0003936 and application thereof, and belongs to the technical field of microorganism application. The invention discloses bacillus amyloliquefaciens GX0003936 with a broad-spectrum bacteriostatic effect, which is preserved in the China General Microbiological Culture Collection Center on March 26, 2025, and the preservation number of the bacillus amyloliquefaciens GX0003936 is CGMCC (China General Microbiological Culture Collection Center) No.33987. The bacterial strain has broad-spectrum antibacterial activity, can be used for remarkably inhibiting the growth of mycelia of colletotrichum musae and colletotrichum frutescens, and can be used for remarkably reducing the disease incidence rate of tropical fruits such as bananas, mangoes and the like in the postharvest storage period. Meanwhile, the strain shows a good inhibition effect on various plant pathogenic fungi, and has a potential broad-spectrum biocontrol effect.

The invention belongs to the technical field of functional Pickering emulsion preparation, and particularly discloses a silk fibroin nanoparticle-stabilized biphase drug-loaded Pickering emulsion and an antibacterial application thereof. The curcumin-loaded silk fibroin nanoparticles Cur-SFNPs with uniform form and size are prepared by using an anti-solvent precipitation method. In order to improve the antibacterial effect of the Pickering emulsion, the Cur-SFNPs is utilized to stabilize the soybean oil loaded with resveratrol, and the oil-in-water type Pickering emulsion is prepared. The Pickering emulsion prepared by taking Cur-SFNPs as a stabilizer has the characteristics of small particle size, uniform distribution, storage stability, heating stability, freeze-thaw stability, food safety and environmental friendliness. And as a two-phase drug-loaded emulsion, two natural hydrophobic active drugs are loaded at the same time, so that the solubility and bioavailability of the emulsion can be enhanced, the loaded active substances play a synergistic antibacterial and antioxidant role, and the emulsion can be applied to food preservation.

There is a challenge in creating a seamless food supply chain that aligns with unique characteristics of each food item while considering business values. The present disclosure address the challenges associated with the food supply chain by providing a system and method for evaluating sustainability of a food supply chain network using digital twin. The present discourse describes developing a set of modeling abstractions and a digital twin-based approach to explore ideal supply chains for food, aiming to reduce food wastage, ensure food quality and improve profit margins. In the present disclosure, unique characteristics of fruit supply chains are described which are further applied to food supply chains. Using the characteristics of climacteric fruits, unique requirements that contemporary perishable food supply chains need to consider are described. Furthermore, a digital twin-based approach specifically designed for climacteric fruits is provided to address modeling requirements and enable evidence-based and justification-backed holistic decision-making.

The invention belongs to the technical field of functional food, and relates to prebiotic dried sweet potatoes and a preparation method thereof. Comprising the following steps: thermally drying the surfaces of cut sweet potato strips / slices, atomizing and spraying alpha-amylase, and then steaming and liquefying; the steaming and liquefying process comprises the following steps: steaming at 55-65 DEG C, and heating to 85-100 DEG C for steaming; performing primary drying, atomizing and spraying an enzyme preparation solution on the surfaces of the primarily dried sweet potato strips / slices, and performing saccharification and glucoside conversion; enzyme preparations in the enzyme preparation solution are beta-amylase and alpha-glucosidase; and carrying out two-stage drying dehydration on the saccharified and glucoside-converted dried sweet potatoes, cooling, and carrying out high-temperature sterilization. The preparation method provided by the invention is simple and convenient in process; rich starch and soluble sugar of the sweet potatoes are converted into bifidus factor isomaltooligosacharide, so that the product has a probiotic function, and the functionality and additional value of the product are increased; and the prepared dried sweet potatoes also have a preservative effect.

Device for keeping fresh produce conditioned, particularly for fruit, comprising a receptacle with a substantially cup-shaped chamber which is enclosed by a wall and conditioning means, wherein the conditioning means comprise at least a cooling device (35) and at least an air displacing device (55), wherein a cavity (25) comprises at least one air channel (25, 27) which is in open communication with the air displacing device so as to guide the forced airflow at least partially, and wherein an inner wall (21) is provided in the bottom with perforations (28) which maintain an open communication between the chamber and at least one of the at least one air channel.

The invention belongs to the technical field of microbial agents, and particularly relates to a preservative and fresh-keeping microbial composition as well as a microbial agent and application thereof. The microbial composition disclosed by the invention comprises bacillus subtilis LS and bacillus velezensis LX, and in the microbial composition, the concentration ratio of the bacillus subtilis LS to the bacillus velezensis LX is (0.1-1): (0.1-1); the preservation number of the bacillus subtilis LS is CGMCC (China General Microbiological Culture Collection Center) NO.30953; the preservation number of the bacillus velezensis LX is CGMCC (China General Microbiological Culture Collection Center) NO. 30954. In the microbial composition provided by the invention, the bacillus subtilis LS and the bacillus velezensis LX can generate a synergistic effect and can be used for preventing and treating the soft rot of the kiwi fruits, and a theoretical basis and technical guidance are provided for biological prevention and treatment and storage and fresh-keeping of the soft rot of the kiwi fruits.

The invention discloses a preparation method of a slow-release solid preservative, and relates to the field of fruit preservation, and the preservative is prepared from the following raw materials in parts by weight: 5-8 parts of chitosan, 2-4 parts of carrageenan, 1-5 parts of sodium citrate, 2-3 parts of silicon dioxide, 3-4 parts of 1-methylcyclopropene, 2-3 parts of chlorine dioxide, 1-2 parts of water and 3-6 parts of baking soda. The preservation method of the slow-release solid preservative comprises the following steps: loading the solid preservative in a non-woven bag, placing the non-woven bag in a foam box or a packaging bag loaded with fruits, and sealing the foam box or the packaging bag. The baking soda in the preservative releases carbon dioxide, 1-methylcyclopropene and chlorine dioxide, and meanwhile, the physiological metabolism of the fruits and the generation of ethylene are effectively inhibited, and pathogenic bacteria are killed, so that the shelf life of the fruits is prolonged.

The invention provides a tropical fruit preservative film which is of a double-layer structure, the outer layer is a moisture-resistant antibacterial layer, and the inner layer is a water-absorbing antifogging antibacterial layer; and the water-absorbing anti-fog antibacterial layer also comprises a pH sensitive microcapsule. The outer layer is prepared from polyhydroxyalkanoate, a humidity sensitive type block copolymer and CuO / SiO2 antibacterial nano-enzyme; and the water-absorbing anti-fog antibacterial layer comprises polyhydroxyalkanoate, a humidity-sensitive block copolymer, hygroscopic zeolite, thymol, gallic acid and a pH-sensitive microcapsule. The preservative film has a certain hydrophobic effect, the humidity of a packaging microenvironment can be adjusted, breeding of putrefying bacteria can be inhibited, meanwhile, thymol and gallic acid form a slow-release antibacterial system, and tropical fruits keep good quality in the storage and transportation links through cooperation of all the components; besides, the pH sensitive microcapsules can respond to acidic substances generated by corruption in real time, help merchants to quickly sort deteriorated fruits, and provide a visual judgment basis for consumers at the same time.

The invention discloses an intelligent modified atmosphere packaging film with gas selectivity and pH / humidity double response as well as a preparation method and application of the intelligent modified atmosphere packaging film. The preparation method comprises the following steps: mixing thymol emulsion and graphene oxide dispersion liquid, and stirring and reacting at room temperature in a dark place to prepare graphene oxide-thymol; the preparation method comprises the following steps: dissolving chitosan in an acetic acid aqueous solution, then adding graphene oxide-thymol and a plasticizer, and carrying out ultrasonic dispersion treatment to form a film-forming solution; and carrying out film forming treatment on the film forming solution by adopting a casting method to prepare the intelligent modified atmosphere packaging film with gas selectivity and pH / humidity double response. The prepared intelligent modified atmosphere packaging film can be modified automatically, is uniform and stable in structure, high in encapsulation efficiency, close in coordination, good in antibacterial and antioxidant activity and excellent in mechanical property and gas barrier property, can realize selective adsorption of gas, controls release of thymol by responding to changes of the pH value and humidity in the environment, and has a good application prospect. The method has a good application prospect in the field of fruit and vegetable preservation.

The invention provides bacillus velezensis H5 capable of producing broad-spectrum antibacterial substances and application of the bacillus velezensis H5. The preservation number of the bacillus velezensis H5 in the China General Microbiological Culture Collection Center is CGMCC No.32671. The bacillus velezensis H5 is separated from sea mud in a specific sea area, can generate antibacterial substances with broad-spectrum antibacterial activity, and mainly comprises bacitracin, surfactin and mycostatin. The antibacterial substance of the bacillus velezensis H5 is applied to preservation of perishable fruits such as grapes and the like and mildew prevention of cereals such as corn and the like, and can effectively inhibit spoilage of the perishable fruits and synthesis of mycotoxins such as aflatoxin and the like, and the action effect of the antibacterial substance is obviously superior to that of a food preservative natamycin. The invention provides a novel, green, safe and broad-spectrum antibacterial substance for preservation and fresh-keeping of fruits and mildew prevention of grains, and has important application value.

The invention relates to the technical field of microorganisms, in particular to bacillus velezensis NEAU-L05, application of the bacillus velezensis NEAU-L05, antibacterial cyclic lipopeptide Iturin A and application of the antibacterial cyclic lipopeptide Iturin A. The bacillus velezensis NEAU-L05 disclosed by the invention is preserved in the China General Microbiological Culture Collection Center, the address is Institute of Microbiology, Chinese Academy of Sciences, 3 #, 1 # yard, West Beichen Road, Chaoyang District, Beijing, the preservation date is December 19, 2024, and the preservation number is CGMCC No.33130. The bacillus velezensis NEAU-L05 disclosed by the invention can be used for preparing the bacillus velezensis NEAU-L05. The bacteriostasis rate of the bacterial strain to botrytis cinerea of phytopathogen is 67.2%. The bacteriostatic cyclic lipopeptide ItuinA separated from the strain can improve the storage performance of berries, and a basis is provided for development of multiple biocontrol microbial agents with excellent performance.

A clathrate of 1-methylcyclopropene with α-cyclodextrin, obtained as a solid particulate product, is modified by comminuting, classifying, or both to obtain a modified particulate. When subjected to identical atmospheric disgorgement conditions of humidity and temperature, identical masses of the modified and unmodified particulates exhibit different rates of 1-methylcyclopropene disgorgement. Specifically, we have found that a smaller mean particle size is inversely related to a greater rate of 1-methylcyclopropene release.

The invention relates to the technical field of terminals, in particular to a gas adjusting method and device for a fruit and vegetable storage space, a medium, a product and a chip. The method comprises the following steps: in a first time period, acquiring a first target concentration of oxygen, a first concentration of ethylene in a fruit and vegetable storage space and a first temperature of the fruit and vegetable storage space; fruits and vegetables of a first type are at least stored in the fruit and vegetable storage space; determining first predicted respiration intensity according to the first concentration, the first temperature, the first type and the first target concentration; acquiring first power consumption of the nitrogen making machine; determining a first balance value according to the first predicted respiration intensity, preset target respiration intensity and first power consumption; under the condition that the first balance value is smaller than the preset balance value, the oxygen concentration in the fruit and vegetable storage space is adjusted to be the first target concentration. Therefore, accelerated maturation of the fruits and vegetables caused by too high respiration intensity of the fruits and vegetables can be avoided, and high cost caused by too much nitrogen input of the nitrogen making machine can also be avoided.

The utility model aims to provide a multi-layer structure long-acting preservative paper, which comprises a base film, a first slow-release layer, a buffer layer, a second slow-release layer and a waterproof breathable layer, the first slow-release layer is arranged on one side surface of the base film, the buffer layer is arranged on one side surface, far away from the base film, of the first slow-release layer, and the second slow-release layer is arranged on the waterproof breathable layer. The second slow-release layer is arranged on the side face, away from the first slow-release layer, of the buffer layer, the waterproof breathable layer comprises a PE macromolecule breathable film and non-woven fabric, the non-woven fabric and the PE macromolecule breathable film are sequentially arranged on the side face, away from the buffer layer, of the second slow-release layer, and the non-woven fabric is used for making contact with vegetables and fruits. Therefore, the buffer layer is arranged between the first slow-release layer and the second slow-release layer, so that the decomposition period of sulfur dioxide is effectively prolonged, and the water is not easy to lose by arranging the waterproof breathable layer, so that the fresh-keeping effect on vegetables and fruits can be improved.

The invention belongs to the technical field of fresh keeping of agricultural products, and particularly relates to a fresh-keeping packaging film capable of inhibiting browning and a preparation method of the fresh-keeping packaging film. The fresh-keeping packaging film sequentially comprises a first PE layer, a second PE layer, a third PA layer, a fourth PA layer and a fifth PE-EVA-POE layer from the first layer to the fifth layer from outside to inside, the first PE layer comprises the following raw materials in parts by weight: 25-40 parts of low-density polyethylene, 15-30 parts of linear low-density polyethylene, 30-60 parts of high-density polyethylene and 2-5 parts of a modified nano material; the modified nano material is prepared by mixing nano titanium dioxide, nano silicon dioxide and nano zinc oxide and then sequentially reacting with a silane coupling agent KH570 and a hyperbranched polymer. The prepared fresh-keeping packaging film has an excellent fruit browning prevention effect and is high in puncture resistance and good in low-temperature resistance effect.

The invention provides a cordyceps militaris fermentation extract and application thereof in preservation of agaricus bisporus, and belongs to the technical field of deep processing of edible mushrooms and preservation of agricultural products. The preparation method of the cordyceps militaris fermentation extract comprises the following steps: (1) taking cordyceps militaris sporocarp, adding water, grinding, and performing enzymolysis by using cellulase and papain in sequence to obtain cordyceps militaris pulp; (2) adding glucose and waste beer yeast powder into the cordyceps militaris pulp, then inoculating lactobacillus paracasei and bifidobacterium bifidum, and fermenting; and (3) after fermentation is completed, carrying out ultrasonic crushing, centrifuging to remove thalli, and carrying out spray drying to obtain the cordyceps militaris fermentation extract. The method can effectively reduce the browning index and weight loss ratio of agaricus bisporus, can slow down the increase of malonaldehyde, reduces the activity of PPO enzyme, and prevents enzymatic browning caused by the synergistic effect of the PPO enzyme and peroxidase. The SOD enzyme activity in the agaricus bisporus can be kept, active oxygen in tissues can be removed, and the metabolic balance of the active oxygen can be maintained.

The invention discloses a high-barrier degradable vegetable and fruit preservative film based on multi-layer compounding and a preparation method thereof, belongs to the technical field of food packaging materials, and aims to solve the technical problem that the barrier property, the mechanical property and the antibacterial property of the degradable vegetable and fruit preservative film in the prior art need to be further improved. The degradable vegetable and fruit preservative film comprises a first layer, a second layer and a third layer which are sequentially laminated, and the first layer is prepared from, by weight, 65-75 parts of polylactic acid, 4-8 parts of maleic anhydride grafted polylactic acid, 2-4 parts of modified carbon nitride, 1-3 parts of alizarin microcapsules, 3-6 parts of modified lignin and 1-2 parts of auxiliary additives; through the synergistic effect of the modified carbon nitride, the alizarin microcapsules and the modified lignin, the barrier property, the mechanical property and the antibacterial property of the degradable vegetable and fruit preservative film are further improved.

The invention discloses pyridone endoperoxide with antibacterial and antiviral activity and application thereof, and belongs to the fields of organic compound synthesis and medical technology, food engineering and the like. The invention proves that the series of endoperoxides can effectively kill pathogenic bacteria, fungi and viruses, including propionibacterium acnes, escherichia coli, staphylococcus aureus, candida albicans, human papilloma viruses, herpes simplex viruses and the like. The internal peroxide designed by the invention has the capability of treating skin diseases, is expected to be developed into a first-line medicine for treating skin diseases caused by pathogen invasion, and mainly relates to bacterial skin diseases, fungal skin diseases and viral skin diseases caused by pathogen infection. Meanwhile, the series of endoperoxides can be used for treating oral infection, periodontitis, infection of shoulder and other joint operations, and bacterial infection such as pressure sores. In addition, the peroxides in the series can also be used in the fields of food preservation, disinfectant preparation and the like.

A preparation method of plant compound essential oil comprises the following steps: preparing mixed powder from dried lemon slices, mint and litsea coreana, carrying out carbon dioxide supercritical extraction, and collecting an extract; the preparation method comprises the following steps: dropwise adding a carboxymethyl-beta-cyclodextrin solution into a mixture of eugenol and thymol, carrying out ultrasonic treatment to obtain an ultrasonic mixed solution, standing, centrifuging, collecting supernate, and drying to obtain a white powdery inclusion compound; and adding lecithin, Tween 80, disodium pyrophosphate and deionized water into the extract, heating and stirring, continuing to add the inclusion compound, homogenizing to obtain a nano-emulsion, adding gelatin and propylene glycol, heating and preserving heat, and cooling to obtain the plant composite essential oil. The compound essential oil disclosed by the invention has antibacterial and antioxidant effects, and has relatively strong antibacterial ability on botrytis cinerea and penicillium germs, and the DPPH free radical scavenging rate is greater than or equal to 90%. According to the invention, the active ingredients of the essential oil are wrapped by carboxymethyl-beta-cyclodextrin and synergistically embedded by lipidosome through a nano-embedding technology to realize slow release, so that the antioxidant and antibacterial properties are effectively prolonged.

The invention discloses a preservative sprayed before picking of peach fruits and a spraying method thereof, and is characterized in that the preservative is prepared from the following raw materials in percentage by mass: 2-8% of alginate oligosaccharide, 0.05-0.2% of gamma-aminobutyric acid, 0.5-2% of capric triglyceride, 0.1-0.3% of glycerol, 1-3% of tween-80, 0.2-1% of sodium carboxymethyl cellulose and the balance of water. The method for spraying the preservative to the peach fruits before picking the peach fruits comprises the following steps: selecting peach trees with consistent tree age and growth vigor, starting from the 90th-110th day after the peach fruits bloom, spraying the peach fruits three times every three days, uniformly spraying the surfaces of the peach fruits until the surfaces of the peach fruits are in a dripping state, and spraying the preservative to the surfaces of the peach fruits. The method has the advantages that the commodity fruit rate of the picked peach fruits is increased, the storage period of the peach fruits is prolonged, the normal-temperature storage rotting rate of the peach fruits is reduced, the cold damage caused by low-temperature storage is relieved, and the quality and taste of the fruits are kept.

The invention discloses a bionic microstructure multifunctional composite film and a low-temperature in-situ preparation method thereof, the film is composed of a biomass polymer matrix layer, a nano composite structure layer of uniformly dispersed metal oxide nanowires and two-dimensional transition metal carbides, and a surface bionic microstructure layer, wherein the bionic microstructure layer comprises micron bulges and nano fluff which are periodically arranged; the preparation method comprises the following steps: carrying out ultrasonic-centrifugal synergistic dispersion on the biomass polymer and the nano functional material; a three-dimensional porous structure is constructed through template-assisted freezing forming; and the pulse plasma assists in chemical vapor deposition in-situ growth of the bionic microstructure. The resistance change rate of the film under 100% strain is lt; 5%, the O2 / CO2 selective transmission ratio reaches 12: 1, the tactile sensitivity is 35 kPa <-1 >, and the electrochromic response time is lt; the water contact angle is gt in 50s; 150 DEG C; the technical problem that multifunctional integration, low-temperature preparation and environmental friendliness are difficult to consider at the same time is solved, and the method can be widely applied to the fields of flexible electronics, intelligent packaging, bionic sensors and the like.

Disclosed are various embodiments of an auger-style treatment tank equipped with instrumentation. In one embodiment, an auger treatment tank includes an auger configured to rotate within treatment liquid in the auger treatment tank. The auger includes an auger shaft and at least one auger flight coupled to and helically disposed about the auger shaft. The auger treatment tank also includes one or more sensors configured to provide data directly or indirectly indicating a torque transmitted to the auger to effect rotation.

According to the technical scheme, the copper-doped lasting antibacterial fresh-keeping material comprises a base body, an antibacterial nanofiber and copper ion loaded antibacterial hydrogel layer and a surface coating, the antibacterial nanofiber and copper ion loaded antibacterial hydrogel layer comprises antibacterial nanofibers and copper ion loaded antibacterial hydrogel, and the surface coating is coated with the antibacterial nanofibers and the copper ion loaded antibacterial hydrogel. The surface coating comprises microcapsules for contactable food products; the preparation method comprises the following steps: preparation of the copper-tannic acid coordination compound, preparation of the antibacterial nanofiber layer, preparation of the copper ion loaded antibacterial hydrogel, preparation of the substrate, interlayer compounding process, preparation of the sustained-release microcapsule coating, crosslinking and post-treatment. The humidity-responsive on-demand release of copper ions of the fresh-keeping material is realized, the antibacterial and fresh-keeping effects are good, the safety is high, and the environment-friendly effect is realized.

A fresh food preservation equipment is provided, includes a preservation box formed with a cavity therein, an atomization device configured for outputting water mist to the plasma activated droplet generating device, a plasma activated droplet generating device configured for ionizing the water mist output from the atomization device and feeding a resultant activated mist into the cavity, a refrigeration device configured for reducing temperature inside the cavity, a sensing system includes an oxygen sensor, a humidity sensor, and a temperature sensor for monitoring oxygen concentration, temperature and humidity in the cavity, respectively, and a control unit. Compared with the prior art, the fresh food preservation equipment in the present disclosure achieves the effects of keeping moisture and reducing the respiration intensity of fruits and vegetables while keeping fresh, and the quality of fresh food is effectively ensured, so that the shelf life is prolonged.

The invention provides an electrochemical device, a method for deoxidizing and humidifying gas and application thereof, and the method for deoxidizing and humidifying gas comprises the following steps: introducing water into the anode side of the electrochemical device containing a proton exchange membrane, and introducing oxygen-containing gas into the cathode side; under the driving of external voltage, oxygen evolution reaction is carried out on the anode side to generate protons; and the protons migrate to the cathode side through the proton exchange membrane and are subjected to an oxygen reduction reaction with oxygen in the oxygen-containing gas, water is generated and discharged along with unreacted gas, and deoxygenization and humidification of the gas on the cathode side are synchronously achieved.

The invention discloses a use of a polylactic acid active packaging film in the preservation of B. cerana. The polylactic acid active packaging film is prepared by using an Ag@MOF carrier to load a natural antibacterial agent, which is then fully mixed with polylactic acid and then melt-extrusion blow molding. The packaging film is used to package the B. cerana to achieve active packaging of the B. cerana, inhibit the growth of microorganisms, and extend the shelf life of the B. cerana. The preservation method has a simple process and is easy to operate. The materials used are biodegradable, reducing environmental pollution caused by packaging. The natural antibacterial agent, Litsea cubeba essential oil, is added to the preservative film, which can effectively inhibit the growth and reproduction of major spoilage bacteria isolated and identified from the B. cerana. The Ag@MOF is used to load the Litsea cubeba essential oil, which can effectively control the release rate of the Litsea cubeba essential oil, achieving long-lasting antibacterial and antioxidant purposes. The preservation method can effectively extend the storage period of the B. cerana.

The application discloses a kind of metal-loaded starch aerogel and its preparation method and application, comprising the following steps: (1) starch and water are prepared into starch milk, starch milk is heated, and gelatinized starch solution is obtained;(2) sodium laurate is added to the gelatinized starch solution and heated to react, and after the reaction is completed, starch-sodium laurate complex solution is obtained;(3) metal nitrate solution is added to the above-mentioned complex solution, and after stirring uniformly, a reducing agent is added to reduce metal ions, and metal-loaded starch hydrogel is obtained;(4) the above-mentioned hydrogel is pre-frozen and freeze-dried to obtain metal-loaded starch aerogel.The metal-loaded starch aerogel of the application has excellent ethylene adsorption capacity, with an adsorption capacity of about 32 mL / g, good adsorption stability, and the adsorption process can be carried out at normal temperature and pressure, which can be used for fruit preservation.

The utility model relates to a novel Chinese chive harvesting device which comprises a machine frame, a gathering mechanism and a cutting mechanism, a plurality of wheels are arranged at the bottom of the machine frame, the gathering mechanism comprises two conical barrels arranged at intervals, the conical bottoms of the conical barrels face backwards and are rotationally connected to the front portion of the machine frame, and the cutting mechanism is arranged behind the gathering mechanism and connected with the machine frame. The first conveying mechanism is obliquely arranged on the rack, the first conveying mechanism comprises two sets of conveying assemblies arranged side by side, the ash scattering mechanism comprises a feeding port, an ash scattering pipe and a spiral conveyor, and the packaging mechanism is arranged behind the first conveying mechanism and connected to the rack; and the packaging mechanism is used for packaging the cut Chinese chives. According to the novel leek harvesting device, under the condition that leeks on the ground can be harvested and packaged, the functions of preserving moisture and fertilizer and scattering plant ash are achieved, the production efficiency is improved, the quality of the leeks is guaranteed, and farmers can conveniently store and sell the leeks.