156results about How to "Respiratory suppression" patented technology

The invention provides a fruit and vegetable fresh-keeping agent, a preparation method and application thereof. The fresh-keeping agent uses burdock fructo-oligosaccharides as main composition and combines aqueous solution prepared by chitosan, ascorbic acid, salicylic acid, calcium chloride and acetic acid to treat fruit and vegetable, so that a fruit and vegetable system can obtain the improved resistance, and a hyaloplasmic fresh-keeping membrane is formed on the surface of the fruit and the vegetable so as to effectively inhibit the growth of microbe, prevent moisture dissipation and contact between the fruit and the vegetable and air, and inhibit breath and transpiration, thereby greatly deferring aging of the fruit and the vegetable, and inhibiting putridity, mildew and rot. The fruit and vegetable fresh-keeping agent is applicable to storage and fresh-keeping for various fruits and vegetables with long fresh-keeping period and small consumption of nutrient materials.

The invention discloses an intelligent fruit and vegetable controlled atmosphere carrier vehicle, which comprises a headstock, a chassis, an airtight box and a human-computer interaction interface, and also comprises a control system, an air exchange device, a signal acquisition system, a ventilation system, a liquid nitrogen controlled atmosphere system, a humidifying system, a solar charging system, a temperature control unit, a diesel generator and a dampproof device, wherein the chassis is respectively connected with the headstock and the airtight box; the control system is respectively connected with the human-computer interaction interface, the air exchange device, the signal acquisition system, the ventilation system, the liquid nitrogen controlled atmosphere system, a humidifying system, the temperature control unit and the diesel generator; and the diesel generator is respectively connected with the control system, the ventilation system, the humidifying system, and the temperature control unit. The invention also discloses a method for implementing the carrier vehicle. The intelligent fruit and vegetable controlled atmosphere carrier vehicle and the method have the advantages of making the fruit and vegetable fresh-keeping environment more uniform, improving the quality of the fruit and vegetables, prolonging the fruit and vegetable fresh-keeping period and the like.

The invention provides a method for improving quality of kiwi fruit and special high-quality fruit comprehensive agents. According to the method, a high-quality fruit agent No.1 capable of increasing color, sugar, hardness and yield and preventing diseases is used after fruit picking, before and after blooming an during base fertilizer application; a high-quality fruit agent No.2 capable of thickening cell walls and increasing cell density is used in a fruit swelling period, a fruit strengthening period and a fertilizer application period, wherein weight ration of the high-quality fruit agents No.1 and No.2 to water is 1:400-600, the high-quality fruit agent No.1 can be sprayed on leaves or applied to soil once after fruit picking, before and after blooming an during base fertilizer application, the high-quality fruit agent No.2 can be applied twice, once every a half month, in the fruit swelling period, the fruit strengthening period and the fertilizer application period. Through adoption of the method and the special high-quality fruit comprehensive agents, the internal quality and external fruit shape, color, storability and freeze injury resistance of kiwi fruit can be improved, the use is convenient, the cost is reduced, kiwi fruit trees become strong and can bloom and bear fruits easily, the quality of fruits is improved greatly, the disease resistance is enhanced and yellows can be prevented and controlled.

The invention discloses an anti-flaming antisepsis leather coating which is composed of, by weight, 2-3 parts of hydrous zinc borate, 1-1.5 parts of linoleic acid calcium soap, 0.1-0.2 part of triterpenoid saponin, 0.7-1 part of calcium naphthenate, 1.7-2 parts of polyvinylpyrrolidone, 0.8-1 part of polyacrylamide, 1.6-2 parts of stannous chloride, 0.1-0.13 part of triethanolamine, 190-200 parts of methyl methacrylate, 3-4 parts of lauryl sodium sulfate, 0.1-0.2 part of urotropine, 0.2-0.3 part of ammonium persulfate, 6-7 parts of a 20%-25% formaldehyde solution, 16-20 parts of zinc acetate, 4-7 parts of silver nitrate, 1-2 part of decabromodiphenyl ether and 0.4-1 part of sodium lauryl sulfate. The anti-flaming antisepsis leather coating has a good antibacterial property and excellent moisture permeability and water resistance. Leather coated with the obtained emulsion is good in antibacterial property and excellent in hygiene property.

The invention discloses a storage and fresh-keeping comprehensive treatment method for Huangguan pears. The comprehensive treatment method comprises seven steps of harvesting in the optimum period, calcium supplementing treatment, film coating treatment, 1-methylcycloproene treatment, packaging, pre-cooling and refrigerating; and the method comprises the steps of pre-cooling in the harvesting period and after the harvesting period as well as other treatment steps, all the steps are interlocked and indispensable, and the method has a good fresh-keeping effect. The method disclosed by the invention can effectively control the phenomena that the Huangguan pears are softened, wilted and decayed, and have superficial browning spots and thinned flavors, and the like in the process of storage, thereby facilitating the original flavor and quality of fruits.

The invention discloses a mango water retention sterilization filming liquid which consists of shellac, glycerol monostearate, sodium carbonate, enestroburin, amino oxyl acetic acid and a solvent, wherein the mass concentration of shellac is 15-20%, the mass concentration of glycerol monostearate is 0.1-0.2%, the mass concentration of sodium carbonate is 0.3-0.5%, the mass concentration of enestroburin is 0.003-0.006% and the mass concentration of amino oxyl acetic acid is 0.001-0.002%. Through the adoption of the mango water retention sterilization filming liquid, the freshness cost is lowered, no cold tolerance pathogenic bacterium is generated, inspiration of mango and growth of bacteria on the surface of mango are inhibited, and rot is prevented. The water retention sterilization filming liquid is good in stability, the mango is not deteriorated after being preserved for half a year, the surface of the mango can be smooth and fresh by using the water retention sterilization filming liquid, the fruit rot rate is less than 3% after 100 days, the driage is less than 12%, and the taste is kept fresh.

The invention discloses an edible compound coating antistaling agent for drupes. The edible compound coating antistaling agent belongs to the field of fresh preservation and treatment of fruits and vegetables and is characterized in that chitosan and other auxiliaries are dissolved in a water solution prepared in an acetic acid solution with low concentration. According to the invention, glycerylmonostearate and Tween 80 are added in chitosan coating, thus the connecting strength of antibacterial components is enhanced and, the toughness and air permeability of the coating are improved; and meanwhile, other components in the fresh preservation agent, such as sodium ascorbate, sodium chloride, and the like, have greater bacterial resistance and fresh preservation effects. The edible compound agent, after being applied to coating the drupes, can form a layer of shiny transparent film on the surface of each drupe and achieves the functions of preserving water, reducing bacterial contamination, preventing the growth of microorganisms, resisting oxidation and inhibiting the fruit respiration. The edible compound agent can be widely applied in the storage and fresh preservation of the drupes and achieves greater fresh preservation effects than other methods. The edible compound agent is convenient to prepare and use, requires small equipment investment, occupies a small operation area, and is suitable for industrial batch production.

The invention discloses a plant protection pellicle, comprising 8-12 percent of polyvingl acetate emulsion,8-12 percent of humate, 3-5 percent of hydroxypropyl methylcellulose, 0.5-1 percent of alkyl sulphonates, 4-6 percent of Polyoxyethylene lauryl alcohol, 1.5-3 percent of gelatine glue, 1-2 percent of nano silica hydrated and 60-70 percent of water, and the compositions are added into water and mixed evenly to achieve black-brown suspension liquid. The plant protection pellicle has the functions of drug action, fertilizing, bagging and slow release. After dilution by water and spraying, a monomolecular film invisible to eyes is formed on the surface of the plant, thereby, the fruit tree is coated with 'clothes' immediately for thermal insulation, frost protection and drought resistance, restraining the transpiration of the moisture in the tree body, preventing the secondary infection of disease germs and improving the quality of agricultural products.

An environmental protection packing film of the invention is prepared by konjac glucomannan, carrageenan, glycerine, sucrose fatty acid ester and water; the tensile strength, elongation at break, flexibility and transparency etc. of the invention are superior to like products; and the invention also has advantages of convenient access of materials and low price. The environment protection packing film is non-toxic and does no harm to health even eaten by mistake, thus giving more safety with packing food. Furthermore, transmittance and selectivity are different to different types of gas molecules, selective separation is provided for gases, and oxygen can pass through the film faster than carbon dioxide. The invention is used for packing fruits and vegetables, the proportion of CO2\O2 in the packing bag is gradually increased, which can effectively inhibit respiration of fruits and vegetables and reduce metabolism and senescence.

The invention provides a fruit fresh keeping agent. The fruit fresh keeping agent is prepared from fresh keepingcompounds, latic acid, chitosan, carnosol or rosmanol, a colloid film former, sodium carboxymethylcellulose, aloe gel powder, cinnamic acid, citric acid, glycerin and the like, wherein the fresh keeping compounds comprise glycine betaine, resveratrol, vitamin C, bacterium resistant plantflavone and the like. The fruit fresh keeping agent forms an inner-outer double-layer water gel during use, the inner-layer water gel includes antioxidation antibacteria fresh keeping components, andthe outer-layer water gel isolates air from the inner-layer water gel. Combination of the inner-layer water gel and the outer-layer water gel has double effects on fruits and effectively prolongs thestorage period of the fruits.

The invention is a melon-fruit preservative solution which is composed of chitosan solution (2.5-5.0w percent), gelatin (2.0-5.0w percent), glycerol (0.5-1.0w percent), cane sugar (0.5-1.0w percent), tragantine (5.0-10.0w percent) and plant rosemary extract (80.0-85.0w percent). The chitosan solution is the saturated liquid of chitosan in acetic acid with concentration of one percent; the plant rosemary extract is distillate of the plant rosemary with temperature of 90-103 DEG C received by distillation after the filtration and slag removal through being soaked in water with the volume 40 times greater than that of plant rosemary. The invention has advantages of easy material getting, simple preparation method, low production cost, small energy consumption, innocuity to human bodies, non environment pollution, long preserving time for melon and fruit-in particular to high-grade fruit and good effects.

The invention relates to an edible film coating fresh-keeping agent, and a preparation method and a use method of the edible film coating fresh-keeping agent. The edible film coating fresh-keeping agent comprises the following raw materials: mucedin, chitosan, zein, glycerol, whey protein isolate, soybean protein isolate, pectic polysaccharide and glycerol. The edible film coating fresh-keeping agent has corrosion prevention, fresh preservation, sterilization and water loss prevention effects, can avoid escape of nutrients, or spoiling and deterioration of food, is edible and biodegradable, and avoids pollution to an environment.

The invention discloses a medical fertilizer with a function of preventing and treating root-knot nematode and a preparation method as well as application thereof. The medical fertilizer is prepared from the following components in parts by weight: 10 to 75 parts of major element fertilizer, 1 to 10 parts of medium trace element fertilizer, 1 to 10 parts of humic acid-containing raw material, 1 to 10 parts of chitosan oligosaccharide, 0.1 to 10 parts of abamectin, 0.1 to 10 parts of iprodione, 0.1 to 10 parts of fluopyram, 1 to 10 parts of surfactant and the balance of filler, wherein the parts of all the components are 100 parts. The fertilizers, biostimulants such as humid acid and the chitosan oligosaccharide as well as pesticides are compounded, so nutrition can be provided for crops, and root-knot nematode disease can also be effectively prevented and treated; time and labor are saved; the medical fertilizer is a novel environment-friendly product meeting the pesticide and chemical fertilizer zero growth requirement of the Ministry of Agriculture.

The invention discloses a preservative for fruits and vegetables, which comprises the following components in percentage by mass: 5-8% of an emulsifier, 3-5% of Litsea cubeba extracts, 2-4% of star anise extracts, 2-3% of chitosan, 2-3% of calcium chloride, 1.5-3% of calcium bisulfite, 1.5-3% of calcium chlorite, 1.5-3% of anhydrous ethanol, 0.5-1% of citric acid, and the balance of distilled water. A use method of the preservative for fruits and vegetables comprises the following steps: soaking vegetables or fruits into the preservative for 5-10 minutes, taking out the vegetables or fruits out of the preservative and drying the vegetables or fruits, placing the vegetables or fruits into a preservative vessel, covering preservative films on the vegetables or fruits, and storing the vegetables or fruits under the condition of room temperature. The preservative for fruits and vegetables disclosed by the invention is excellent in properties, keeps the quality of fruits and vegetables, enhances the commodity property of fruits and vegetables, and prolongs the shelf life of fruits and vegetables; the preservative is safe, environment-friendly, non-toxic, harmless and pollution-free; the preservative is high in efficiency, and has an antibacterial effect superior to that of sodium benzoate; and the preservative is simple in machining process, moderate in cost and easy to use, and therefore, the fresh-keeping agent disclosed by the invention is an economic and ideal preservative for fruits and vegetables.

A zoom lens in which aberration variations at telephoto end during focusing are suppressed while suppressing breathing at wide angle end, which includes, from object side: a positive first unit which does not move for zooming; a negative second unit which moves during zooming; at least one zooming unit which moves during zooming; a stop; and an imaging unit which does not move for zooming. The first unit includes: a negative first sub unit which does not move for focusing; a positive second sub unit which moves to image side during focusing from infinity to proximity; and a positive third sub unit which moves to object side during focusing from infinity to proximity. Focal lengths of the first, second, first sub, and second sub units, and amounts of movement of the second and third sub units during the focusing from infinity proximity are appropriately set.

The invention belongs to the technical field of grain storage, and in particular relates to an underground bionic honeycomb granary and a grain storage method. The granary is designed through the reference and absorption of the original ecological honeycomb structure principle and comprises a granary body positioned below the ground surface, wherein the granary body consists of a plurality of rows of honeycomb silos among which gaps are formed in the transverse direction; each row of honeycomb silo comprises a plurality of silos which are tightly arranged along the longitudinal direction in turn; a silo upper opening is formed at the upper end of each silo and is provided with a closed cover; each silo comprises a reinforced concrete layer or a brick-concrete masonry layer; a polyethylenefilm layer is arranged in each silo; a spodosol layer is backfilled in an outer wall gap of each silo; and soil or sandstone or a soil and sandstone mixed material is backfilled among the spodosol layers. Grain is stored in the polyethylene film layers and isolated from outside, so that four ecological factors such as moisture, temperature, oxygen and light rays which can cause the deterioration of the stored grain are inhibited from the source, the stored grain is free from insects, mildew, rat damage, fires, floods and earthquakes, and the shelf life of the stored grain is prolonged by morethan one time.

The invention discloses a CO2 packaged low-temperature low-dose irradiation refreshing method for edible mushrooms, comprising the following steps of: step I, deairing an edible mushroom film and charging CO2 for packaging; step II, precooling the edible mushroom packaged in the step I to be 0-4 DEG C; and step III, adopting 60Co r rays or 5-10MeV electron beam rays to perform irradiation to the edible mushroom in the step II, wherein the irradiation absorbed dose is 0.1-1.0kGy, and the inequality of irradiation dose is less than 1.25. In the invention, the comprehensive irradiation refreshing method maintaining the original color, fragrance, taste and state of the edible mushrooms is adopted, when the irradiated edible mushrooms are stored at normal temperature (10-25 DEG C), the original color, fragrance, taste and state are maintained for 4 days, and when the irradiated edible mushrooms are stored at 0-4 DEG C, the original color, fragrance, taste and state are maintained for 14 days. The packaging filled with CO2 is adopted, CO2 can effectively inhibit breathing of the edible mushrooms, irradiation is performed when the edible mushrooms are precooled to be 0-4 DEG C, at 0-4 DEG C, the breathing of the edible mushrooms can be reduced, growth reproduction of harmful microorganisms polluting the edible mushrooms is inhibited, and negative reaction of edible mushrooms, caused by irradiation, at the temperature can be reduced.

The invention discloses a grain fresh keeping method, which comprises the following steps: detecting the temperature, humidity and oxygen concentration of air in a granary; when the oxygen concentration in the granary is greater than a set value, introducing nitrogen or carbon dioxide into the granary; when the temperature in the granary is deviated from the set value, introducing cold or hot air into the granary so as to adjust the temperature of the granary back to the set value; and when the humidity in the granary is deviated from the set value, adjusting the humidity in the granary to the set value. Through the method, the oxygen concentration, humidity and temperature of the air in the granary are controlled respectively to make the granary in a hypoxic, constant humidity and constant temperature state to further restrict the breath of grains, so the metabolism of the grains can be maximally slowed down on the premise that the grains are kept in normal life processes, the maturity of the grains is maximally prolonged and the aims of storage and fresh keeping are fulfilled.

The invention discloses an intelligent pre-cooling treatment and sectioned controlled atmosphere storage combined system for controlling low-temperature cold damage of cold-sensitive fruit vegetable type vegetables and belongs to the technical field of intelligent control on food quality. The system comprises a sensor detection module, a data acquisition module, a wireless communication module, a terminal and a control system, wherein the sensor detection module detects carbon dioxide, ethylene as well temperature and humidity in a preservation chamber, then the data acquisition module connected with the sensor detection module acquires data, and the wireless communication module connected with the data acquisition module sends the data to the terminal; the sensor detection module is also connected with the control system, and the control system controls environmental parameters when the terminal reads the sensor detected data. Compared with existing physical and chemical analysis methods and artificial sensory analysis, the system has the advantages that to-be-tested samples cannot be damaged, the task load is small, and the objectivity and efficiency are higher.

The invention discloses a phase temperature controlled-atmosphere fresh-keeping method for grapes; the method comprises the following steps: a, laying grape clusters in each case frame which is attached with a fresh-keeping bag, and sealing the bags; b, transporting the case frames to a refrigerator, laying in a single-layer form, opening the fresh-keeping bags, pre-refrigerating for 24h; d, tying the openings of the fresh-keeping bags, setting the storage temperature to be (-1.0) DEG C to (-0.1) DEG C; e, conducting primary SO2 gas fumigation treatment; f, conducting SO2 removing treatment; g, conducting controlled-atmosphere storage on the grapes; h, conducting the fumigation treatment on the grapes of the step g every other 15-21 days by using SO2 with volume concentration of 0.1% to 0.3%, performing the fumigation for 20min each time, reducing the amount of the SO2 within 15-20min after the fumigation treatment till the residual amount is 5-10ppm; and i, repeating the steps from g to h until delivery. The method uses the combination of controlled-atmosphere and SO2 fumigation, solves the mildew and rot problems of the grapes by using the minimal amount of SO2, thereby enhancing the quality of the grapes and prolonging the fresh-keeping period.

The invention discloses a porous material composite fruit wax-coating preservative capable of controlling breath, and solves the problems that fruits are rotted and deteriorated easily to produce alcohol, can be kept fresh difficultly and cannot be stored. The composite preservative consists of the following components in percentage by mass of 5 to 9.8 percent of shell-lac, 0.05 to 3 percent of porous material (comprising three-dimensional network porous silicon oxide, kieselguhr, porous ceramic and porous carbon), 0.04 to 3 percent of cosolvent, 0.05 to 0.3 percent of bacteriacide, 0.01 to 0.1 percent of dispersing agent and the balance being water. Mangos and pineapples which are coated with the preservative can still taste fresh after being stored for 30 days, so that the weight loss rate is reduced twice, and the rotting rate is less than 5 percent; and the quality of fruits is guaranteed, the storage period and the shelf life of the fruits are prolonged, and economic loss caused by rotting and deterioration of the fruits and the like is reduced effectively.

The invention relates to a fruit and vegetable preservative and a use method thereof. The preservative comprises a carbon dioxide adsorbent used for absorbing the carbon dioxide to ensure the volume content of the carbon dioxide in the enclosed environment to be 0.1-20%, an ethylene absorbent used for absorbing the ethylene to ensure the volume content of the ethylene in the enclosed environment to be less than 0.01% and a gas release agent used for releasing the oxygen to ensure the volume content of the oxygen in the enclosed environment to be 1-5%. The gas release agent is hyperoxide and is mixed with the carbon dioxide adsorbent and the ethylene absorbent in a weight ratio of 0-50:50-95:2-50. The preservative can prolong the fruit and vegetable preservation period, can effectively control the change of the smell, mouthfeel, color and the like, belongs to pure physical preservation and has no influence on the inner quality of the fruits and vegetables.

The invention discloses application of a glutaminase inhibitor in preparation of a medicine for treating psoriasis. In-vitro cell experiments prove that the glutaminase inhibitor can inhibit keratinocyte metabolism glutamine, inhibit miR-31 induced up-regulated keratinocyte mitochondrial respiration, inhibit miR-31 induced mTOR pathway, reduce cell activity and promote cell apoptosis, and has an anti-inflammatory effect; animal experiments prove that the glutaminase inhibitor can be used for effectively treating imiquimod-induced mouse psoriasis-like pathology change, including remarkably reducing the Baker score of skin lesion, effectively reducing the epidermal hypertrophy degree, remarkably reducing the number of subepidermal capillaries, remarkably reducing the number of epidermal Ki67positive cells and reducing the expression of epidermal GLS. Therefore, the glutaminase inhibitor can be used for preparing the medicine for treating psoriasis.

The invention discloses an extracting method of mango seed essential oil and application thereof in refreshment of pitaya. The extracting method of the mango seed essential oil comprises the following steps: drying, pulverizing, microwave pretreatment, super-critical CO2 extraction and two-stage molecular distillation. Mango seed crude essential oil obtained by super-critical CO2 extraction is subjected to second-stage molecular distillation to obtain mango seed essential oil, and the mango seed essential oil extracted by the extracting method of the mango seed essential oil is high in purity and small in purity. The mango seed essential oil is applied to refreshment of the pitaya, bacteria on the surface of the pitaya, inside the pitaya and in a storage environment can be killed, bacteria attack is prevented effectively, meanwhile, the mango seed essential oil has effects of resisting oxidation and clearing free radicals of the pitaya, brown stain of the pitaya is inhibited, melanin is inhibited, meanwhile, procyanidine in the pitaya can protect a fresh-keeping film of the pitaya against being decomposed, by the fresh-keeping film, the consumption speed of nutrients of the pitaya is reduced, rot and deterioration of the pitaya is slowed down, and the shelf life of the pitaya is prolonged.

A vegetative rodenticide is prepared from the vegetative toxin chosen from ricin, ricinine, and castor allergen, and attractant. Its advantages are high attraction and killing power, high palatability, and no environmental pollution.

The invention mainly relates to the technical field of planting, and discloses a tomato storing method. The tomato storing method comprises the following steps of cleaning tomatoes for removing dirt, performing high-temperature dehydration, performing fresh keeping, performing sterilization, performing packaging, and performing storage. The tomato storing method is simple, the tomato storing time can be as long as 90-100 days, after 110 days, the intact preservation rate of the stored tomatoes is 91.2%, the water content is 81.7%, and economic returns are increased by 11.4%. After the tomatoes are picked, the picked tomatoes are cleaned with a dietary alkali solution, so that sundries can be removed, bright color of the tomatoes can be maintained, skins are hardened, the damage of the tomatoes is reduced, and the storage period of the tomatoes is prolonged; the tomatoes are subjected to high-temperature short-time treatment, so that the water content of the skins is reduced, the tomatoes are not liable to damage due to collision, the respiration effect of the skins is weakened, the contents of moisture and nutrients in the tomatoes are maintained, and the storage period of the tomatoes is prolonged; a fresh-keeping agent solution is sprayed onto the tomatoes, so that the respiration of the tomatoes is restrained, the effects of resisting bacteria and killing insects are achieved, the tomatoes are kept complete, and the tomatoes are not decomposed; the fresh keeping agent solution is extracted from pure plants, so that the fresh keeping agent solution is safe and healthy, the flavor of the tomatoes is maintained, and the disease resistance of human bodies can be enhanced.

The invention discloses fruit wax for fresh-keeping of fruits and vegetables and a preparation method and an application. The preparation method comprises the steps of adopting a phase inversion emulsion method, selecting high-quality oleic acid, myristate, morpholine, potassium hydroxide, polydimethyl siloxane, and deionized water according to characteristics of oxidized polyethylene and carnauba wax, choosing appropriate emulsification temperature and time for emulsifying the wax and the adding quantity and speed of the deionized water, obtaining an O / W type emulsion, and obtaining the oxidized polyethylene and carnauba wax composite fruit wax for the fresh-keeping of the fruits and the vegetables. The fruit wax synthesized by the method is high in film-forming strength and extremely high in glossiness after film forming, can be comparable to imported wax liquid, and is good in water retention property and air permeability; the outstanding performance of the fruit wax completely surpass that of imported high-gloss fruit wax at present; and the fruit wax meets the requirements of green, safe and mechanical waxing of food. The fruit wax can be widely used for waxing the fruits and the vegetables such as citrus, apples, peaches and tomatoes.

The invention discloses a preservative film for short-term storage of fruits and vegetables. A micro-foamed film body with a surface layer for slowing down water loss and adsorbing ethylene is formed on the preservative film, and the density of the film body is 0.5-0.9 g / cm<3>. The invention further discloses a preparation method of the preservative film for short-term storage of the fruits and the vegetables. The invention further discloses a preservative bag produced by using the components and the preparation method. By adopting the technical scheme of the invention, the film has sufficient adsorption capacity for ethylene gas wrapped in the film, and the adsorption capacity cannot be reduced obviously under natural ambient conditions, so that the speed of maturing and decaying the fruits and the vegetables wrapped by using the preservative film is effectively reduced, the decomposition time of the fruits and the vegetables is prolonged, the freshness of the fruits and the vegetables is guaranteed, and the decomposition of matured fruits and vegetables is also avoided; through the addition of catalysts, micro foams on the surface of the film body are promoted, the freshness of the fruits and the vegetables is guaranteed, and the maturity and decomposition of the fruits and vegetables cause by the concentration of the ethylene gas are also avoided.

The invention discloses a controlled-atmosphere fruit and vegetable transportation and preservation method utilizing dry ice. The method comprises the steps that harvested fruits and vegetables are organized and sorted and then are put in controlled-atmosphere preservation bags; the dry ice is put into dry ice layers of the controlled-atmosphere preservation bags, and the bags are rapidly sealed and then are put into conventional foam box for transportation. The controlled-atmosphere preservation bags are divided into fruit and vegetable placement layers and dry ice placement layers, the two layers are connected in a heat seal mode to make the fruits and vegetables not in contact with the dry ice, and fruit and vegetable and dry ice placement vent holes are left in the connecting parts and used for air exchange of two layers. The method can prolong the fruit and vegetable preservation time by reducing the fruit and vegetable temperature and inhibiting fruit and vegetable respiration, meanwhile mechanical fruit and vegetable damages caused by jolting in the transportation process are decreased, the fruit and vegetable quality is improved, and the market demand is met.

The invention discloses fresh keeping coating film fluid for plums, and a preparation method of the fresh keeping coating film fluid in the technical field of fresh keeping of fruits and vegetables. The fresh keeping coating film fluid comprises enveloping fluid and sterilization fluid, wherein the ratio of the mass parts of the enveloping fluid to the mass parts of the sterilization fluid is 9 to 1, the enveloping fluid is made from the following components in parts by mass: 11-13 parts of bleached shellac, 20-22 parts of glycerine and 9-12 parts of sucrose ester, and sterilization fluid is made from the following components in parts by mass: 5-7 parts of a licorice root extracting solution and 6-9 parts of a lophatherum herb extracting solution. The method for preparing the fresh keeping coating film fluid comprises four steps of preparing the enveloping fluid, preparing the licorice root extracting solution, preparing the lophatherum herb extracting solution and performing mixing. The fresh keeping coating film fluid disclosed by the invention is used for wrapping the surfaces of the plums, the evaporation and the respiration of water of the plums can be restrained, organic acid and vitamin C in the plums can be well reserved, and the nutrient value and the eating quality of the plums are high.