103results about How to "Decrease the rate of decay" patented technology

The present invention discloses a sponge-like silicon graphene and carbon nano-tube composite negative electrode material preparation method, which comprises, by weight, 50-90% of silicon powder, 2-35% of graphene, and 1-25% of carbon nano-tubes. According to the present invention, the composite material prepared by using the freeze-drying or supercritical drying method retains the original skeleton structure, the carbon nano-tubes are adopted as the skeleton support unit and the graphene is adopted as the frame pore structure surface to co-support the three-dimensional electric conduction network composite structure having innumerable pores, and the silicon powder is adsorbed inside the pores; the composite material has characteristics of high conductivity, high structure elasticity, strong adsorption, effective inhibition of the volume expansion effect of the silicon during the charge and discharge process, and improvement of the cycle stability of the material; and the process is simple and environmental protection, and is suitable for industrial production.

The invention provides a popping boba, a beverage containing the same and a preparation method of the popping boba. The popping boba comprises a popping boba shell and popping boba inner juice wrapped in the shell; the popping boba shell is made of sodium alginate, the popping boba inner juice comprises an active probiotics matrix and sweet water protection fluid with a mass ratio of (1:1)-(1:9); the mass ratio of the sodium alginate to the sweet water protection fluid is (0.05:99.95)-(2:98). According to the popping boba, activated lactobacillus is buried in the soft shell formed by the sodium alginate, and is quickly burst out when being chewed, and the interestingness of a product is increased; the preservation time of the popping boba is long, and the stability of the product is good; according to the preparation method of the active probiotics popping boba, by optimizing the additive amount of a protective agent in the sweet water protection fluid, the product is enabled to have better activity of the probiotics in the shell life, and the probiotic effect of the product is added.

The invention discloses a water-based nano thin-coating heat preservation paint and a preparation method thereof. The paint comprises the following raw materials by weight: 30-40 parts of an acrylic emulsion, 5-10 parts of titanium dioxide, 20-40 parts of hollow glass beads, 5-20 parts of aerogel and 5-10 parts of a film-forming assistant. According to the invention, the hollow glass beads and aerogel are used as the heat insulation basic raw materials, the heat conductivity coefficient of the paint is greatly reduced and is as low as 0.031-0.035W / m.K, and the paint can reach a remarkable heatinsulation effect under the condition of a very small construction thickness. Meanwhile, the hollow glass beads and the aerogel are conducive to improving the chemical stability of the paint itself,thus improving the covering power, lightening power, corrosion resistance, light resistance and weather resistance, and enhancing the mechanical strength of the paint; cellulose, a wetting dispersant,a defoaming agent and a preservative are mixed; by virtue of ethylene glycol, the acrylic emulsion and a pH regulator, the paint has excellent cohesiveness, weather resistance, film-forming properties, gloss and color retention and mechanical properties; and the use of a vinyl chloride-vinylidene chloride copolymer emulsion also can reach a grade A1 flame retardant effect.

The invention discloses a compound preservative applied to marine fishes and a using method of the preservative and belongs to the technical field of preservation of aquatic products. The compound preservative is characterized by comprising the following substances in parts by weight: 30-40 parts of sensitive plant general flavone extract, 35-45 parts of melicopicine general flavone extract and 15-35 parts of tangerine general flavone extract. According to the compound preservative applied to marine fishes and the using method of the preservative, the compound preservative has the effects of preservation and corrosion prevention, and the speed of rotting and deteriorating foods can be delayed; a uniform film layer can be formed on the surface of the marine fishes treated by the preservative, the preservative is non-toxic and edible, and the storage period can be effectively prolonged; a modified atmosphere packaging method is combined, and the preservation time of the marine fishes is further prolonged, and the preservation effect is further improved; and moreover, the preservative is safe, pure natural and low in production cost, and the treated marine fishes have the similar freshness, flavor and quality of live fishes within 50-60 days.

The invention relates to a fresh-keeping agent containing rhizoma gastrodiae, which belongs to processing technical field of the fresh-keeping agent. The fresh-keeping agent is characterized by comprising the following ingredients by weight percent: 61 to 75 percent of rhizome gastrodiae extract, 12 to 19 percent of sterilization components, 6 to 13 percent of synergistic components and 3 to 9 percent of film-forming components. According to the fresh-keeping agent containing the rhizome gastrodiae, the pure natural rhizome gastrodiae extract is adopted as an active ingredient and is mixed with the natural sterilization, synergistic and film-forming components to prepare the fresh-keeping agent. The fresh-keeping agent has a fresh-keeping and preservative function and has a good fresh-keeping action on fruits, meat, seafood and vegetables. Due to the adoption of the fresh-keeping agent, the rotting speed of the food can be slowed down, moisture evaporation of the vegetables and fruits can be reduced, and wilting of the vegetables and fruits can be prevented; and meanwhile, a layer of uniform film can be formed on the surface of the food after being processed with the fresh-keeping agent, and the film is toxic-free and edible, so that the storage period can be effectively prolonged. The fresh-keeping agent has a simple processing method, less investment on equipment, guaranteed source of raw materials and low production cost and is safe and pure natural.

The invention discloses a garbage can. The garbage can comprises a garbage can main body and a refrigerating device, wherein the garbage can main body comprises an outer cylinder and an inner cylinder located in the outer cylinder, the refrigerating device comprises an evaporator and a condenser which are connected with each other, the evaporator is arranged by surrounding the wall of the inner cylinder, and the condenser is arranged on the wall of the outer cylinder. According to the technical scheme of the invention, the refrigerating device is arranged in the garbage can to reduce the temperature of the garbage can so as to reduce the garbage rotting rate, specifically, the evaporator and the condenser are separately arranged, and the evaporator is arranged by surrounding the wall of the inner cylinder, so as to realize production of cooling capacity in a multidimensional manner and further reduce the temperature of the garbage to be below the bacterial reproduction temperature, thus reducing pollution.

The invention provides a mildew-proof and mothproof coating for ancient wooden buildings in humid environments in middle and lower reaches of Yangtze River and a preparation method of the mildew-proof and mothproof coating. The mildew-proof and mothproof coating is composed of two components A and B in the mass ratio of 1: 2; the component A is prepared from the following components in parts by weight: 90-120 parts of acrylate-polyurethane water dispersion, 0.5-1.5 parts of thixotropic agent and 5-20 parts of deionized water; the component B is prepared from the following components in parts by weight: 2-8 parts of propylene glycol methyl ether acetate, 0.5-5 parts of dispersant, 0.2-0.8 part of antifoaming agent, 10-30 parts of deionized water, 10-40 parts of super fine talc powder, 10-40 parts of kaolin, 10-30 parts of iron oxide red, 0.8-1.2 parts of dimethyl methylphosphonate, 10-20 parts of nano-silver oxide mildew-proofing agent and 4-8 parts of vegetable moth-proofing agent; and the invention also discloses a preparation method of the coating. The coating has the functions of waterproofing, fire resistance, mildew resistance and moth resistance, and is green and environment-friendly.

A method, an apparatus, and a computer program are provided to minimize filter capacitor leakage in a Phased Locked Loop (PLL). In high frequency processors and devices, filter leakage currents can cause substantial problems by causing PLLs to drift out of phase lock. To combat the leakage currents, a dummy filter and other components are employed to provide additional charge or voltage to a low pass filter during lock. The provision of the charge or voltage exponentially decreases the rate of decay of voltage across the low pass filter caused by leakage currents.

The invention discloses a method for preserving pseudosciaena crocea by combining a natural preservative with modified atmosphere packaging, and belongs to the technical field of aquatic product preservation. The method comprises the following steps: (1) slaughtering the fresh and alive pseudosciaena crocea and flushing; (2) soaking the pseudosciaena crocea in the natural preservative, wherein the natural preservative contains the following materials in parts by weight: 10-20 parts of melicope patulinervia extract liquid, 15-25 parts of ginkgo leaf extract liquid, 20-30 parts of grapefruit extract liquid and 30-45 parts of purple perilla extract liquid; (3) performing modified atmosphere packaging; (4) refrigerating for preservation. The method has preservation and anti-corrosion effects and can delay the food decomposition and deterioration speed; a thin film formed on the surface of the pseudosciaena crocea is nontoxic and edible; by combination with the modified atmosphere packaging, the preservation time of the pseudosciaena crocea is prolonged and the preservation effect of the pseudosciaena crocea is improved; moreover, the method is simple, convenient, safe, pure natural and low in production cost; the pseudosciaena crocea processed by the method still has the freshness, flavor and texture similar to those of alive pseudosciaena crocea within 55-65 days.

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.

The invention provides an intelligent freshness preservation refrigerator capable of identifying varieties of fruits and vegetables. The refrigerator comprises a freezing chamber and a refrigerating chamber. An independent freshness preservation chamber is arranged in the refrigerating chamber. The freshness preservation chamber is internally provided with a central processing unit and a circuit substrate connected with the central processing unit. Colorful freshness preservation lamps are arranged on the circuit substrate. The colorful freshness preservation lamps comprise red LED lamp beads, orange LED lamp beads, yellow LED lamp beads, green LED lamp beads, blue LED lamp beads, cyan LED lamp beads and purple LED lamp beads. The intelligent freshness preservation refrigerator further comprises a pressure sensor, a humidity sensor, an atomizing device, a camera, an image processor and a data storage which are connected with the central processing unit. The central processing unit controls the circuit substrate according to detection results of the pressure sensor and the humidity sensor as well as the varieties of fruits and vegetables. The circuit substrate controls the turned-on number and the turning-on intensity of lamp beads of different colors.

The invention discloses a fresh-keeping agent for aquatic products as well as a preparation method and a using method of the fresh-keeping agent, and belongs to the field of fresh keeping of the aquatic products. The fresh-keeping agent comprises the following raw materials of a rosa roxburghii tratt fruit total flavonoid extract, a vine tea total flavonoid extract, a spina date seed total flavonoid extract, an Asiatic cornelian cherry fruit total flavonoid extract, a fructus forsythiae total flavonoid extract, a photinia serratifolia total flavonoid extract, propolis, sodium tripolyphosphate, lysozyme, organic acid, tea polyphenols, quercetin and bamboo vinegar. The preparation method of the fresh-keeping agent comprises the following steps of firstly, adding an appropriate amount of water to a Chinese herbal medicine total flavonoid extract, performing uniform mixing, and then adding the remaining raw materials. The using method of the fresh-keeping agent comprises the following steps of placing the slaughtered aquatic products in the fresh-keeping agent, then fishing out the aquatic products placed in the fresh-keeping agent, performing draining, performing modified atmosphere packaging and performing refrigeration. The fresh-keeping agent for the aquatic products, disclosed by the invention, is natural and non-toxic in components, good in fresh-keeping effect and safe to prepare and use, has the broad-spectrum antibacterial effect, effectively delays the increment of total bacterial count and the increment of volatile basic nitrogen and further prolongs the fresh-keeping time of the aquatic products.

The invention provides a plant extract preservative.The preservative contains an extract clear liquid and a wild vine tea extract, wherein the extract clear liquid is prepared from 3-8% of grapefruit, 1-5% of waxberry tree leaves, 3-6% of honeysuckle flower, 3-6% of chrysanthemum flower, 1-5% of sensitive plant, 1-3% of baijiu and 67-88% of water. The weight of the wild vine tea extract accounts for 9-20% of the total weight of the extract clear liquid. The invention also provides a preparation method of the plant extract preservative and its application on the aspects of fruit preservation and the like. The plant extract preservative has the advantages of convenient to use, safe, non-toxic and remarkable in preservation effect.

The invention belongs to the technical field of aquaculture and particularly relates to a method for cultivating babylonia lutosa. The method comprises the following steps: a babylonia lutosa culture pond which is of an inversely V-shaped structure and has a high middle of the pond bottom and two low sides; a pipeline with holes is arranged on the inclined plane of the pond bottom which is of the V-shaped structure, and a sewage draining port is arranged above an outlet of the pipeline with the holes; boulting cloth and thin sea sand are laid after medium coarse sea sand or mixture of the medium coarse sea sand and ledge fragments is laid at the bottom of the culture pond; air, pure oxygen and natural or artificial sea water are led into the culture pond through the pipeline with the holes each day, so as to achieve the goal that the water body in the babylonia lutosa culture pond is not subject to melanization and deterioration easily and achieve the goal that the growth rate of babylonia lutosa is quickened.

The invention belongs to the field of storage and freshness keeping of agriculture products, and particularly relates to a nuisanceless freshness keeping agent for fruits and vegetables and a preparation method of the nuisanceless freshness keeping agent for fruits and vegetables. The freshness keeping agent for fruits and vegetables comprises the following components in percentage by weight: 20-30% of a propolis aqueous solution, 30-40% of an onion aqueous solution, 10-20% of a star anise extracting solution and the balance of sterile water. The freshness keeping agent for the fruits and the vegetables is prepared through the steps of preparing the extracting solutions, mixing the prepared extracting solutions, filtering the mixed extracting solutions, and packaging the filtered extracting solutions. The ingredients of the freshness keeping agent for the fruits and the vegetables are useful and harmless to human bodies, so that the freshness keeping agent is safe and reliable; the freshness keeping agent not only can prolong the storage period of the fruits and the vegetables, but also can maintain and improve the color of the fruits and the vegetables and improve the quality; besides, the freshness keeping agent has the advantages of being extremely easy in formula and being convenient to operate.

The invention discloses a preparation method of a long-acting fresh-keeping corrugated case. The preparation method comprises the following steps: (1) adding neodymium chloride and lanthanum chlorideinto water, uniformly mixing and stirring the mixture, continuously adding sodium aminosalicylate into the mixture, heating the mixture to 88-90 DEG C, and insulating the mixture for 2-3 hours to obtain rare earth aminosalicylate; (2) uniformly mixing a pure acrylic emulsion, the rare earth aminosalicylate, eugenol type basil oil, tricalcium phosphate and water to prepare a fresh-keeping coating;and (3) brushing the fresh-keeping coating to the inner surface of the corrugated case, putting the corrugated case in an oven, and drying the corrugated case to prepare a finished product. The preparation method of the long-acting fresh-keeping corrugated case provided by the invention is simple to operate and low in cost, and can reduce the rot rate of fruits and keep the sensory quality of thefruits.

The invention relates to the field of preservatives and in particular to a fruit and vegetable preservative which contains the following raw materials: 20-26 parts of a fruit peel extract, 4-8 parts of a penetration enhancer, 10-14 parts of humectants, 4-6 parts of chitosan, 2-6 parts of organic acids, 4-6 parts of sodium alginate, 4-6 parts of sodium succinate, 2-4 parts of edible ethanol, 1-3 parts of edible salt water, 8-14 parts of ascorbic acid, 2-4 parts of clove, 2-4 parts of rosemary and 6-8 parts of a preservative. The fruit and vegetable preservative provided by the invention has very good effects of water retention and corrosion resistance, is capable of retarding rotting of fruits and vegetables and furthermore prolonging the preservation period of the fruits and the vegetables, does not change the original taste of the fruits and the vegetables within a preservation period and has a very good freshening function on fruits and vegetables.

The invention discloses mayonnaise prepared food and a preparation method thereof. The mayonnaise prepared food comprises the following components in parts by weight: 200 to 300 parts of steamed egg, 150 to 200 parts of mayonnaise, 200 to 250 parts of steamed egg white, 150 to 220 parts of shrimp meat, 50 to 100 parts of potato starch, 40 to 90 parts of broccoli and 1 to 3 parts of wheat China low-gluten flour; a soup base comprises the following components in parts by weight: 8,000 to 10,000 parts of low-gluten wheat flour, 4,000 to 6,000 parts of wheat starch, 1,000 to 1,600 parts of table salt, 300 to 500 parts of missible oil, 150 to 200 parts of fatty acid, 300 to 500 parts of monosodium glutamate, and 45,000 to 5,000 parts of water. The mayonnaise comprises the following components in parts by weight: 50 to 80 parts of fresh yolk, 150 to 200 parts of salad oil, 30 to 40 parts of white vinegar, 10 to 20 parts of granulated sugar, 1 to 3 parts of table salt, 3 to 5 parts of horseradish, 0.1 to 0.4 part of white pepper and 1 to 3 parts of monosodium glutamate.

The invention discloses an anti-corrosion treatment method for wood. The anti-corrosion treatment method for the wood comprises the steps that after sterilization and deinsectization through a traditional Chinese medicine soak solution, the wood is treated by adopting a full-cell process; a solute of a preservative used in the treatment process is ACC or CDDC, and a solvent is the traditional Chinese medicine soak solution; and finally, a layer of weather-resistant wood oil is applied on the surface of the dried wood so as to complete the anti-corrosion treatment. According to the anti-corrosion treatment method for the wood, Chinese prickly ash, agastache rugosus and ginkgo leaves are common traditional Chinese medicinal materials and have the effects of sterilization and deinsectization; then the anti-corrosion treatment is carried out by using the full-cell process so that gaps of the wood can be filled with the preservative, and the anti-corrosion effect can be achieved; and finally, the surface of the wood is brushed with a layer of the weather-proof wood oil so that air can be isolated to a certain extent, and the surface of the wood can be prevented from being oxidized. The method has the advantage that the corrosion speed of the wood can be decreased to the maximum extent after the wood is treated by using the method.

The invention relates to the field of fruit freshness retaining, and particularly relates to a method for retaining freshness of psidium guajave. The method comprises the steps of spraying preservative to the surface of psidium guajave and covering an edible preserving film, wherein the preservative is prepared from the following raw materials n parts by weight: 12-16 parts of psidium guajave leaves, 4-6 parts of chitosan, 2-6 parts of acetic acid, 2-4 parts of clove, 2-4 parts of rosemary and 6-8 parts of moisturizer. The method can be used for retarding the rotting speed of psidium guajave, prolonging the shelf life of psidium guajave, cannot change the flavor of psidium guajave in the shelf life, and is more favorable to psidium guajave storage.

The invention relates to a fresh-keeping processing method of Chunhua plum, which is implemented strictly according to the following steps of: processing before picking, picking, precooling, selecting, processing by antistaling agent solution, packing and refrigerating before picking, wherein the precooling is carried out by cool water, the temperature of the cooling water is controlled to be 3-4 DEG C, and the cooling time is 25-35 minutes, so that the temperature of the center of Chunhua plum body is reduced into 4-6 DEG C; and keeping the temperature of the refrigeration house or the refrigerating chamber to be kept at 3-5 DEG C when the plum is refrigerated, and controlling the relative humidity to be 85%-90%, wherein an air interchanger is arranged in the refrigeration house or the refrigerating chamber at the same time. The method provided by the invention has the beneficial effects that: the fruit cracking rate is reduced, the refrigerating temperature is greatly increased compared with the prior art, the power consumption cost of refrigeration is reduced, the comparison of each quality index of the fruit shows that the fruit is hard, and the total soluble solid (TSS) content is lower in the descent velocity compared with the control group under the temperature-reducing storage condition of the invention, and the fruit rotting rate and the fruit pulp browning index are slower in ascending velocity, so that the fresh-keeping processing method is suitable for large-scale popularization and application.

The invention discloses a stereo buried cylindrical concrete coffin for a deep-well tomb hole. The coffin has an inner and outer layer structure form, the inner layer has a cylindrical plastic barrel structure, and the outer layer has a cylindrical reinforced concrete tank structure. The inner layer structure consists of a tubular concrete coffin body, a disc concrete coffin bottom and a disc concrete coffin cover, wherein the cylindrical concrete coffin body and the disc concrete coffin bottom are cast integrally. When a corpse is put into the plastic barrel of the inner layer, an anticorrosive material is filled to protect the corpse, and the air in the plastic barrel is pumped. The outer layer structure totally wraps the plastic barrel structure of the inner layer, and a concrete grouting material is filled in gaps between the inner layer structure and the outer layer structure. The cylindrical concrete coffin has advantages of simple manufacture, low price, good sealing property, good corrosion resistance, high strength, carrying convenience and the like, and is suitable for the deep-well tomb hole; and the cylindrical concrete coffin is stacked with multiple layers to save the land, and trees are planted on the surface to promote greening.

The invention belongs to the technical field of road slope strengthening, and relates to a road slope strengthening treatment method based on plant stem and root system grouting. The method comprises the following steps that firstly, gramineae plants with the developed root systems and the powerful growth capability are sown to a slope surface of a road slope; secondly, after the gramineae plants naturally wither, the branches at the upper portions of the gramineae plants are shorn away, and gramineae plant stems are reserved; thirdly, grouting liquid is prepared, the density of the grouting liquid ranges from 1.2 g / cm<3> to 2.0 g / cm<3>, and the grouting liquid is the mixture of epoxy resin and polyamide resin; fourthly, the grouting liquid is injected into the root systems of the gramineae plants through gramineae plant conduits of the gramineae plant stems; and fifthly, the unearthed position of the gramineae plant stems on the ground serves as the circle center, and the grouting liquid is injected in the circle with the radius ranging from 5 cm to 10 cm. The provided road slope strengthening treatment method based on plant stem and root system grouting is low in cost, green, environment-friendly, high in reliability, capable of facilitating curing, high in adhering force and good in mechanical performance.

The invention discloses a blueberry fresh keeping method utilizing ultraviolet ray irradiation. According to the method, an ultraviolet ray sterilization lamp is used for irradiating picked blueberries, the radiation intensity of the ultraviolet ray sterilization lamp is 5 to 12 muw / cm<2>, and the irradiation time of the ultraviolet ray sterilization lamp is 6 to 12 hours. The blueberry fresh keeping method utilizing ultraviolet ray irradiation has the advantages that the requirement on equipment is low, the mouth feeling of fruit is not influenced, no residue is left, the nutrition ingredients of the fruit are maintained, in addition, the operation is simple, and the implementation is easy.

The invention belongs to the technical field of fruit fresh-keeping, and particularly relates to a biological fresh-keeping agent special for prolonging the shelf life of fruits. By adopting methods of semi-fermentation treatment of tea polyphenol and a Zanthoxylum bungeanum leaf extract and modification treatment of chitosan through epsilon-polylysine, the bacteriostatic and antioxidant effects of the fresh-keeping agent are maximized, then film coating treatment is conducted, the effective usage time of the fresh-keeping agent is prolonged, a one-way thin film is formed after the fresh-keeping agent is used, ethylene generated by the fruits is absorbed and then released into air, thus maturation speed increasing caused by the ethylene generated by the fruits is avoided, the shelf life ofthe fruits is prolonged simultaneously from two aspects of resistance to bacteria and oxidation and ethylene absorption, and the biological fresh-keeping agent has a remarkable effect when especiallybeing applied to the aspects of dragon fruits, passion fruits and plums.

The invention provides a compound fresh-keeping agent for oranges and a fresh-keeping method of the oranges and relates to the technical field of fruit and vegetable fresh-keeping technologies. The compound fresh-keeping agent for the oranges, provided by the invention, is prepared from the following raw materials in parts by weight: 8 to 16 parts of sucrose ester, 5 to 10 parts of citric acid, 2to 6 parts of carboxymethyl cellulose, 4 to 9 parts of nisin, 3 to 8 parts of casein, 3 to 8 parts of sodium alginate, 3 to 9 parts of olive oil, 6 to 12 parts of traditional Chinese medicine polysaccharide, 0.5 to 1.5 parts of activated polypeptide and 120 to 180 parts of sterile water. The fresh-keeping method of the oranges, provided by the invention, comprises the following steps: (1) primarily selecting raw materials and pre-treating; (2) immersing; (3) airing and storing. According to the compound fresh-keeping agent for the oranges, provided by the invention, the quality guarantee period of the oranges can be prolonged and the mouthfeel, sweetness and color and luster of the oranges are not influenced; fresh keeping of the oranges is realized; the fresh-keeping method of the orangesis matched, so that the disease-resisting capability of the oranges is greatly enhanced, the yield is improved and the rotting speed is delayed.

The invention discloses a fresh keeping method of tomatoes. The fresh keeping method comprises the following operation steps of (1) 2-3 days before the tomatoes are picked, spraying the tomatoes withfresh keeping liquid; (2) after the sprayed tomatoes are picked, putting the picked tomatoes in sealed environment, adding 1-methylcyclopropene, performing sealing treatment for 4-6 hours, adding thyme oil to the sealed environment, wherein 1g of the thyme oil is added to a space of each cubic metre, continuing performing sealing treatment for 3-4 hours, and finishing the fresh keeping treatment on the tomatoes. The fresh keeping method of the tomatoes, provided by the invention, is simple to operate and low in cost, and fresh keeping treatment can be performed on scaled tomatoes.

The invention discloses an LED (Light Emitting Diode) fresh-keeping lamp and relates to an accessory fitting of a refrigerator, and in particular relates to a fresh-keeping lamp. The LED fresh-keeping lamp comprises a circuit substrate, a red LED lamp bead, a blue LED lamp bead, an orange LED lamp bead and a lamp holder, wherein the red LED lamp bead, the blue LED lamp bead and the orange LED lamp bead are respectively welded on the circuit substrate; the circuit substrate is arranged in the lamp holder; the red LED lamp bead, the blue LED lamp bead and the orange LED lamp bead are respectively fixed on the lamp holder; each lamp bead body is arranged outside the lamp holder; outgoing power lines are connected on the circuit substrate; one ends of the outgoing power lines are arranged in the lamp holder; and the other ends of the outgoing power lines are respectively arranged outside the lamp holder. The LED fresh-keeping lamp has the advantages that simulated sunlight is formed by a composite light source formed through alternate flicker of light sources with three colors to ensure that vegetables in the refrigerator can conduct normal photosynthesis, so that the rotting speed of the vegetables and fruits can be well delayed and the best fresh-keeping effect of the fruits is achieved.

The invention discloses fresh keeping tablets for grapes. The fresh keeping tablets are prepared from the following raw materials in percentage by weight: 60-70% of a fresh keeping agent, 2-4% of a Chinese herbal medicine antibacterial agent, 10-20% of a slow-release agent, and 1-2% of magnesium stearate, wherein the Chinese herbal medicine antibacterial agent is selected from but not limited to one or several kinds of celery seeds, dill seeds, alpine yarrow herb, hyssopus officinalis and camomile; the slow-release agent is selected from starch and / or microcrystalline cellulose; the fresh keeping tablets are prepared through the following steps: crushing the raw materials, screening the crushed materials, feeding the screened materials through calculation, mixing the fed materials, preparing wet granules, baking the wet granules, enabling the baked granules to be made into whole granules, totally mixing the whole granules, and tabletting the mixed granules, wherein the weight of each fresh keeping tablet is 0.7-0.8g. The fresh keeping tablets for the grapes provided by the embodiment of the invention have the advantages that in the storage and transportation process, the grapes stored with the fresh keeping tablets are high in fresh keeping degree, and the fresh keeping tablets take effect quickly, are convenient, simple and safe, and are free from any side effects. The grapes can maintain the original color and the original flavor for a long term.