375results about How to "No chemical residue" patented technology

Disclosed is a method for soft soil foundation treatment through microorganism grouting sand drain. The method comprises the steps that a, a pile hole 1 is formed in a soft soil foundation to be treated, and sand is poured into the pile hole 1 to form a sand pile; b, a urease-producing microorganism solution 9 and a nutritive salt solution 10 are sequentially and evenly injected into the sand pile through a grouting tube 6, sand cementation is achieved through the microorganism induction calcium carbonate crystal technology, the concentration of the urease-producing microorganism solution 9 and the concentration of the nutritive salt solution 10 are controlled, sand in the pile body forms a specific cementation mode, and the good water permeable characteristic is ensured; c, after the microorganism grouting solidification sand pile is formed, a flexible water permeable sand cushion 4 is laid on the top of the foundation jointly formed by the sand oil and pile space soil 2, prepressing loads 5 are exerted on the top of the flexible water permeable sand cushion 4, pore water in the pile space soil 2 is made to be drained along a drainage channel formed by the sand pile and the sand cushion, the pile space soil is solidified, and the composite foundation with the high bearing capacity is formed jointly through the soft soil obtained after drainage and solidification are carried out on the microorganism grouting sand pile and the flexible water permeable sand cushion covering the soft soil.

The invention discloses a composite fire-proof material with high refractoriness under load for coke ovens. The preparation method of the material comprises the following steps of: evenly mixing and crushing 40%-60% of Al2O3, 15%-30% of SiC micro powder, less than 2% of Fe2O3, 5%-10% of Si micro powder and 1%-3% of cement as an additive; adding 3%-5% of Al(H2PO4)3 as an adhesive and stirring and mixing evenly; and pouring the mixture to a working region in 20-30 minutes. The furnace-building process comprises the following steps of: cleaning a kiln, measuring, molding, positioning and supporting a mould, adding materials, pouring and correcting, cleaning, starting for warming up and testing. The coke ovens newly built by pouring is characterized in that the top of the chamber of the furnace is fan-shaped, the chamber of the furnace is built by on-site seamless overall vibration pouring according to the process above with the furnace-building materials above, afterheat of the furnace can be recycled for power generation and no chemical residues exist. The furnace is short in charring time and higher in coke recovery and can be started and used at any time between the normal temperature and 1550 DEG C.

The invention provides a feed addictive which comprises the following plant raw materials (by weight portion): hyacinth bean 48-58, broomrape 26-36, lily 18-26, root of pilose asiabell 18-28, Siberian solomonseal rhizome 8-16, dipsacus root 8-16, astragalus root 18-28, Chinese yam 58-68, doddor seed 8-16, walnut 18-28 and hemp seeds 8-16.

The invention provides pellet feed for grass carp, and the raw material and weight share are as follows: bean of 10 to 20 shares, rapeseed cake of 15 to 25 shares, cottonseed cake of 10 to 20 shares, wheat bran of 10 to19 shares, secondary flour of 10 to 15 shares, rice bran of 10 to 20 shares, fishmeal of 3 to 6 shares, stone dust of 1 to 2.5 shares, salt of 0.1 to 0.5 shares, dry cactus powder of 0.4 to 0.6 shares, dry aloe powder of 0.3 to 0.5 shares, dry garlic powder of 0.1 to 0.3 shares and probiotics preparation of 0.2 to 0.6 shares. The preparation method for pellet feed is as follows: the raw material is firstly taken out and weighted and then crushed into powder, and then is stirred and mixed, finally, mixture is made into pellet feed which is the finished product. Pellet feed is rich in nutrient, the grass carp grows fast after eating pellet feed, the cost of raising the grass carp is greatly reduced and the immune function of the grass carp is greatly improved. The disease prevention, medical treatment and anti-virus capability of the grass carp are also enhanced.

The invention discloses a method for producing active carbon, comprising the following steps: grinding corn cobs and cornstalks into flocculent corn cob materials and flocculent cornstalk materials bya grinder respectively, evenly mixing and then sending the materials into a particle forming machine to be extruded into particle materials; placing the particle materials into a carbonization kiln to be carbonized to obtain carbonized materials; directly sending the carbonized materials into an activation kiln to be activated without cooling to obtain activated materials; grinding and grading the activated materials to obtain the finished product of active carbon. Wood gas discharged from the flue of the carbonization kiln is introduced into a heating chamber on the lower part of an activation chamber to be ignited for heating the activation kiln; high temperature flue gases generated by combustion of the wood gas are introduced into the flue on the upper part of the activation chamber for carrying out secondary heating on the activation kiln; the flue gases discharged from the flue on the upper part of the activation chamber are introduced out to serve as the heat sources of a steamboiler, and the high temperature steam generated by the steam boiler enters the activation chamber to activate the carbonized materials. The active carbon produced by the method is good in quality and low in cost.

The invention provides a tissue patch and a preparation method thereof. The tissue patch uses an acellular small intestinal submucosa as an inner layer, the two sides of the tissue patch are covered with acellular amniotic membranes; the prepared tissue patch isolates from immunotoxicity of the acellular small intestinal submucosa, and the acellular small intestinal submucosa compensates for the deficiencies of a mechanical strength of the acellular amniotic membrane. Compared with the prior art, the tissue patch has higher biological activity and biocompatibility, no obvious immune rejection and no toxic effect on cells; and the preparation method has the advantages of unlimited raw materials source, cell-free residues, no ethical issues and capability of effectively inactivating virus. The prepared product is applicable to serving as a tissue reinforcement to repair a shortcoming or a defect of a strength of a body soft tissue; the prepared product is used as a tissue filling material and is applicable to the repair of facial depression deformity.

The invention discloses a cable sheath tube for ships, which is prepared by the following steps of: pre-processing, mixing, granulating and drying a mixture of a basic resin, an elastomer, an antioxidant, a light stabilizer, a flame-retardant system, a softening agent, a mildew inhibitor, a radiosensitizer and a color master batch; forming the tube with the materials; and finally irradiating the formed tube by an electron beam. The cable sheath tube prepared by the invention has high elasticity and flexibility, low-smoke, zero-halogen, excellent flame retarding effect, high corrosion resistance, high aging resistance, high mechanical strength, high sealing performance, simple and convenient installation and easy change and installation of a route and effectively solves the problems of protection of various power cables and signal cables inside and outside the ships.

The invention provides a beef cattle fattening feed which has the characteristics of low cost, good fattening effect, obvious economic benefits and the like. The feed comprises a basic ration group including corn, wheat bran, soybean meal, a Chinese herbal medicine additive, ginger flour, a premix, corncob, Chinese wildrye, dry pomace and the like. The beef cattle feed contains rich protein, sufficient energy and various mineral substances, is free from hormone and chemical residues, can improve the appetite of cattle and enhance immunity of the organism, and has the functions of promoting growth of beef cattle and improving the production performance of beef cattle.

The invention provides a method for keeping fruits fresh through atmospheric pressure low temperature plasma activated water. The method comprises the following main steps: (1) pretreating fresh fruits; (2) preparing the atmospheric pressure low temperature plasma activated water; (3) treating the fruits by soaking the fruits in the atmospheric pressure low temperature plasma activated water; and (4) preserving the treated fruits at normal temperature. The plasma activated water is prepared through the following steps: pouring atmospheric pressure low temperature plasma into a hydrogen peroxide aqueous solution of which the mass concentration is 0.1%-3%, and enabling the atmospheric pressure low temperature plasma and the hydrogen peroxide aqueous solution to act for 10-30min so as to obtain activate fluid which is rich in hydroxy radicals. According to the method disclosed by the invention, the growth of bacteria on the surfaces of the fruits can be effectively restrained, the situation that the fruits are decomposed and deteriorated is reduced to a large extent, besides, the quality and the flavor of the fruits are not influenced, and the shelf time of the fruits under normal temperature conditions can be obviously prolonged. The method is simple in technology, easy to operate, low in cost, safe and free from toxic residues, conforms to the development trend of environmentally-friendly foods, and has enormous market application prospects.

The invention belongs to the field of natural organic chemistry, and discloses a method. The method has the advantages that 1, a supercritical CO2 extraction technology is adopted; a system is sealed in an extraction process; destroy of small-molecule volatile oil is avoided; the whole essential oil extraction process is conducted at an approximate room temperature; the activity loss is very little; 2, a molecular distillation technology is adopted for purifying essential oil; an operating temperature is far below a boiling temperature of a substance at atmospheric pressure; in addition, the heating time is very short; the substance cannot be destroyed; the separation and purification degree and the yield of the essential oil are high; and 3, ultrasonic extraction is conducted, so that the heating time of effective components is shortened; the bioactivity is high; a silica gel column chromatography purification technology can ensure that the purity of ursolic acid is further increased; the operation is simple and easy; and the production cost is lowered greatly. With the adoption of the method, the extraction time is shortened greatly; an extraction speed is increased; in addition, a purification effect is obvious; contents of the effective components are high; the essential oil and ursolic acid can be obtained simultaneously; the relative content of the essential oil reaches 77.4%; and the purity of ursolic acid is increased to 98.73%.

The invention provides a method for extracting pleurotus eryngii polysaccharide from pleurotus eryngii leftovers by using subcritical water. The method comprises the following steps of: feeding the pleurotus eryngii leftovers into an extraction kettle; feeding deoxidized deionized water according to a material-liquid mass volume ratio of 1:(5-30); controlling the extraction pressure to be 3-10MPa, the temperature to be 100-250 DEG C and the extraction time to be 10-60min; filtering, cooling and centrifuging; carrying out ultrafiltration by using an ultrafiltration film of which the molecular weight cut-off is 100-300kD; cutting off the filtrate by using an ultrafiltration film of which the molecular weight cut-off is 3-10kD; feeding the crude polysaccharide cut-off liquid into an anion exchange resin column; and eluting by using deionized water; and concentrating under reduced pressure and drying the collected polysaccharide eluate so as to obtain a pleurotus eryngii polysaccharide product. According to the method, a subcritical water extraction technique is combined with the separation means of ultrafiltration edulcoration and resin absorption decoloration, no organic solvents are used in the whole process, the extraction process is green and environment-friendly, and the pleurotus eryngii polysaccharide is high in purity and is applicable to industrial production.

The human vaccine contains bee glue adjuvant in the size 5-10 nm larger than active immunological antigen of 2-20 mg in each milliliter. The human vaccine preparing process includes the steps of freezing coarse bee glue, crushing, extracting, filtering, continuous centrifuging, eliminating residue, eliminating precipitate, adding vaccine, nanometer processing, ultrafiltering, vacuum concentrating to obtain human vaccine containing bee glue adjuvant and freeze to store. The human vaccine has the functions of inactivator, preservative, immunopotentiator, stabilizer and promoter. The present invention has the advantages of being safe and reliable, no chemical residue, no toxic side effect, fast formation of immunological antibody and long immune period.

The present invention provides a method of using atmospheric-pressure low-temperature plasma activated liquid to preserve fruits. The method can effectively inhibit growth of bacteria on surfaces of the fruits, reduces decay and deterioration to a great extent, at the same time does not affect quality and flavor of the fruits, and can also significantly extend a storage period of the fruits in normal temperature conditions. The method is simple in technology, easy to operate, low in costs, safe, free of toxic residues and in line with a development trend of green food and has a great market application potential.

A method for treating ship ballast water and its treating device are disclosed. The process is carried out by immersing two discharge electrodes into ship ballast water, applying high-voltage pulse voltage between two electrodes, producing liquid-phase discharge to generate shock wave, ultraviolet ray and various active free radicals and sterilizing mono-cell, bacterium, protozoon and other harmful living things. It utilizes shock-wave pressure and oxidation effect, ultraviolet sterilizing effect and accelerating chemical reaction, and hydroxyl-free radical, active oxy-bromide species and other free-radical high oxidation processes, the treating device consists of high-voltage power supply, discharge electrode and discharge container. It's cheap and simple and has no chemical dispensing residue. It can be used for ship ballast water transfer and shore-base treatment.

The invention relates to a method for preparing warm composite woven fabric. The warm composite woven fabric is prepared by interweaving a group of warp yarns (1) and three groups of filling yarns in an overlapped way, wherein the three groups of filling yarns are respectively face weft (2), intermediate weft (2') and back weft (2''), the face weft (2), the intermediate weft (2') and the back weft (2'') are arranged according to the proportion of 1:1:1, the warp yarn (1) and the face weft (2) are woven into satin weave which has 8 lines and 5 step weft faces and serves as a surface layer according to a mode of an upper needle and seven lower needles and 5 weft step numbers, the warp yarn (1) and the back weft (2'') are woven into satin weave which has 8 lines and 5 step weft faces and serves as a lining according to a mode of an upper needle and seven lower needles and 5 weft step numbers, the warp yarn (1) and the intermediate weft (2') take honeycomb weave as an intermediate layer in terms of Rj equal to Rw and equal to 8, and the Rj and the Rw are respectively the circulated yarn numbers of warp weave and weft weave. The warm composite woven fabric prepared by the method integrates the characteristics of light weight, super warm property, softness, comfortableness, moisture absorption, air permeability, bacterial resistance and bacterial restraint, and the production is simple and easy to implement.

The invention relates to a method for keeping the dual-spore mushroom fresh, which comprises collecting and pre-cooling the dual-spore mushroom. The invention is characterized in that the pre-cooled dual-spore mushroom is arranged in the air adjusting room at 50-80% volume, while the humidity of room is 95+-4% and the temperature is 1-3Deg. C; the air adjusting room is fed the mixture of O2, CO2 and N2, to confirm the O2 density at 4.6-5.3% and the CO2 density at 15.0-17.05< and the volume ration between O2, CO2, and N2 at 3-6:15-20:74-82. Compared with present technique, the invention can store the dual-spore mushroom with air adjustment, to prolong the storage period to 15 days with simple process, low cost and non-chemical left.

The invention relates to a weathered coal bio-organic fertilizer and a production method thereof. The weathered coal bio-organic fertilizer is characterized by comprising the following raw materials in part by weight: 45 to 55 parts of weathered coal, 20 to 30 parts of chilli powder residue, 8 to 12 parts of cottonseed cake, 10 to 15 parts of saw powder or straw, 1 to 2 parts of urea, 50 to 60 parts of water, 8 to 12 parts of trichoderma culture solution and 8 to 12 parts of bacillus culture solution. The production method is characterized by comprising the following steps of: adding the weathered coal, the chilli powder residue, the cottonseed cake, the saw powder or straw and the water into a fermenting tank; adding the urea and the trichoderma culture solution into the fermenting tank to perform fermentation; and then adding the bacillus culture solution into the fermenting tank with stirring to continuously perform fermentation to obtain the weathered coal bio-organic fertilizer. The weathered coal bio-organic fertilizer has the advantages of wide source of the raw materials, simple method, high bioactivity, comprehensive nourishment supplying to crops, robust growth, high disease resistance and stress resistance, capacity of effectively improving the utilization ratio of an organic fertilizer and a chemical fertilizer, increment in production and income, improvement on soil, rich nutrition and no chemical residues.

The invention discloses a microcellular foam thermoplastic elastomer for a high-speed railway damping base plate. The microcellular foam thermoplastic elastomer is prepared from the following raw materials in parts by weight: 20-80 parts of ethylene propylene diene rubber, 20-80 parts of polypropylene, 0.1-10 parts of a crosslinking agent, 0.3-60 parts of a crosslinking catalyst, 0.5-3 parts of a microcellular foaming agent and 1-10 parts of an aid. A molded product in the invention is a closed-pore microcellular foam elastomer product of which the pore diameter is dozens of microns, and has the advantages of smooth and even appearance, independent air bubbles, small foams and no residue of chemical substances. Meanwhile, the weight of the molded product can be reduced by 10-40 percent, absorbed energy can be increased by 3-5 times under the action of impact, and original crack tips can be passivated, so that the toughness of a material is enhanced, fatigue life is prolonged, and the requirements of physical property, elasticity, kinetic energy absorption and the like on the high-speed railway damping base plate can be met.

The invention belongs to the field of natural organic chemistry, and relates to a method for extracting baicalin from wild scutellaria baicalensis in great khingan, in particular to a novel method for obtaining high-purity baicalin through biological enzymolysis, ultrasonic extraction and a polyamide-macroporous resin coupling technique. The method has the advantages that extraction is quick and convenient; a purification effect is obvious; and the method can be applicable to industrial production. 1, a biological enzymolysis technique is adopted to ensure that effective components in cells are dissolved out fully; 2, an ultrasonic extraction technique is adopted, so that the heating time of the effective components is shortened; the activity loss is less; and the bioactivity of baicalin is high; and 3, the polyamide-macroporous resin coupling technique is combined for use, so that the effective components are further purified; resin can be reused; the production cost is lowered greatly; and the method is applicable to industrial use. The method adopts the biological enzymolysis technique, so that the effective components are dissolved out as much as possible; then the ultrasonic extraction is conducted; finally a polyamide-macroporous resin secondary purification technique is adopted, and recrystallization is conducted; and the purity of baicalin is increased to 98.6%.

The invention discloses a manufacturing method for freeze-drying seafood. The manufacturing method includes the following step of water gun flushing, sand splitting through soaking, boiling through boiling water, ultrasonic cleaning, ozone disinfecting, freeze drying and vacuum packaging. The manufacturing method has the advantages that dirt and impurities on the surface of seafood meat can be removed efficiently and comprehensively, microorganisms and parasites in the seafood meat are killed, a good fresh keeping effect is obtained through the complete freeze drying process, and the freeze-drying seafood meat conforming to the food safety national standard is obtained. The manufacturing method is suitable for freeze-drying manufacturing of seafood of a shellfish kind such as oysters, green sea snails, whelks, pearl sea snails, oyster drills, marine clams, abalones and dried scallop, a sleeve fish kind, a sea fish kind, a shrimp kind and the like.

A preparation method of a purified vitelline freezing antibody for chickens infectious bursal disease is characterized in that: high purity antigens are adopted to vaccinate IBDV B87 to SPF chickens, then velvet urine, idiosome, velvet urine membrence are acquired, grinded, filtered and inactivated to antigens, and the steps are: producing immune eggs, collecting high immune egg, separating vitelline, diluting with distilled water, inactivating, extraction, decentering, inactivating, freezing and checking; the eggs is radiated by Co60 to kill viruses and bacterium, and finally froze by novel immuno-enhancer - Astragali Polysaccharoses and preserved under a temperature of 2-8 DEG C. Composite drugs for prevention and therapy are prepared by adopting the vitelline antibody for chickens infectious bursal disease as major components and cooperating with a novel immuno-enhancer, to decrease the jeopardy of the chicken breeding industry, and improve the living level of people and benefit mankind.

The invention provides pellet feed for carp, and the raw material and weight shares are as follows: bean of 15 to 20 shares, rapeseed cake of 15 to 25 shares, cottonseed cake of 10 to 15 shares, wheat bran of 10 to 20 shares, secondary flour of 15 to 20 shares, rice bran of 7 to 14 shares, fishmeal of 3 to 6 shares, salt of 0.3 to 0.5 shares, dry cactus of 0.4 to 0.6 shares, dry aloes powder of 0.3 to 0.6 shares, dry garlic powder of 0.1 to 0.4 shares and probiotics preparation of 0.3 to 0.6 shares. The preparation method for pellet feed is as follows: the raw material is firstly taken out and weighted and then crushed into powder, and then is stirred and mixed, finally, mixture is made into pellet feed which t is the finished product. Pellet feed is rich in nutrient, the carp grows fast after eating the pellet feed, the cost of raising the carp is greatly reduced and the immune function of the carp is greatly improved. The disease prevention, medical treatment and anti-virus capability of the carp are also enhanced. After eating pellet feed, the produced carp is green environmental protection food.

The invention belongs to the field of natural organic chemistry, and relates to a method for extracting codonopsis pilosula saponin from wild codonopsis pilosula in great khingan, in particular to a novel method for extracting codonopsis pilosula saponin through biological enzymolysis, ionic liquid extraction and ultrahigh pressure purification. The method has the advantages that 1, a biological enzymolysis technology is adopted to allow that effective components in cells are dissolved out fully; 2, the ionic liquid extraction is adopted, and ionic liquid has a good effective component dissolving ability, and has double functions of a solvent and a catalyst; and 3, the ultrahigh pressure extraction is conducted at a room temperature, so that structural changes, losses and physiological activity reduction of the effective components caused by a heating effect are avoided; and dissolving-out of impurity components is reduced, and the yield of saponin is increased by the ultrahigh pressure technology. The method adopts the biological enzymolysis, ionic liquid extraction and ultrahigh pressure coupling technology, the biological enzymolysis is conducted for dissolving out saponin fully, then the ionic liquid catalytic extraction is conducted, the ultrahigh pressure purification is conducted, and finally secondary purification is conducted by silica gel column chromatography, so that the purity of codonopsis pilosula saponin is increased to 99.5%.

The invention provides a preparation method of a thalictrum plant extract. The preparation method comprises ultrasonic-assisted ethanol extraction of thalictrum plant(s). Preferably, the thalictrum plant(s) are / is radix thalictri simplicis and / or radix et rhizoma thalictri. The invention further provides the thalictrum plant extract obtained according to the preparation method, and application of the thalictrum plant extract in preparation of a medicine composition used for inhibiting citrus postharvest pathogen(s). The thalictrum plant extract has a strong inhibitory effect on the citrus postharvest pathogen(s), and no chemical residue exists after the thalictrum plant extract is used for fresh citrus preservation, so that the thalictrum plant extract is harmless to health of human bodies, free from environmental pollution, and low in drug resistance causing possibility.

The invention relates to a method for preparing polyethylene glycol composite nanofiltration membrane and the product thereof. The preparation method comprises: the preparation of polyethylene glycol coating liquor with a concentration of 1*10-4g / L-3g / L: the prepared polyethylene glycol coating liquor is uniformly coated on the surface of basement membrane to obtain the polyethylene glycol coating membrane after dry in room temperature; the said polyethylene glycol coated membrane is irradiated in the electron accelerator field, and the irradiation dose is 5Gry-1*104Gry; the irradiation time is 1min-10min; the coated membrane irradiated is laid for 12-24h in room temperature to obtain the said polyethylene glycol composite nanofiltration membrane. The polyethylene glycol composite nanofiltration membrane of the invention is prepared by the method mentioned in the invention. The preparation method does not bring in chemical crosslinking agent, and has no remain and pollution of organic liquor, which is beneficial to environmental protection. The component of the method is easy to buy, the cost is low and it is convenient for practical application. The nanofiltration membrane has a good hydrophilicity, separation selectivity and water penetration, and is also organic fouling resistant.

The invention discloses an actinidia chinensis planting method. The method includes the first step of address selection and soil preparation, the second step of greenhouse building, the third step of planting, the fourth step of shaping and pruning, the fifth step of fertilization, the sixth step of pesticide application, the seventh step of irrigation and drainage, the eighth step of flower and fruit management, the ninth step of disease and insect prevention, the tenth step of weeding, the eleventh step of fruit harvesting and the twelfth step of pruning. By means of garden plot selection, pressure of actinidia chinensis on soil is reduced, farmyard organic fertilizer is applied so as to provide rich nutrients for actinidia chinensis, mineral content in the planted actinidia chinensis is high, and no chemical residues exist in the planting process. Soil is reasonably used, development of branches and leaves and development of fruits are both taken into consideration, and rooting and survival of actinidia chinensis trees are benefited due to the diameter and the depth of planting pits. In the pollen pollination stage, the dilution dropwise application method is adopted, the pollination success rate is increased, and the yield of single actinidia chinensis plants is increased.

The invention relates to an emulsified soybean protein feed, comprising the following raw materials in parts by weight: 1-90 parts of animal and plant emulsified oil for a feed and 10-99 parts of plant dregs. The production method comprises the following steps: in the raw materials for forming the emulsified soybean protein feed, firstly, putting the emulsified oil and plant dregs into a mixer; inputting the prepared mixture into a bulking machine to puff under the agitation state, so as to obtain the emulsified soybean protein feed prepared from the animal and plant emulsified oil for the feed and the plant dregs; finally, crushing the obtained emulsified soybean protein feed with a crusher, screening by a 20-mesh sieve and packaging. By adopting the method, the plant dregs are mixed with the emulsified oil and then puffed, so that generation of urease can be reduced, anti-nutritional factors are removed, the problem of nutrient loss does not exist in the puffing process, the emulsified soybean protein feed is free of chemical residue, and safe and harmless, the toxic action of the bean pulp as an animal feed on beasts and birds is reduced, the digestibility of the animals on the feed is improved, and the storage time is also effectively prolonged.

The invention relates to a method for preparing a plant extract for inhibiting orange post-harvest pathogenic bacteria, which comprises the following steps: drying the washed caulis impatientis at temperature of 45-50 DEG C, crushing and sieving the dried caulis impatientis with a 40-mesh sieve, and taking minus sieve powder for extraction; adding ethanol with the concentration of 70-95% based onfeed liquid volume ratio of 1:10 for carrying out ultrasonic circulated extraction at ultrasonic frequency of 30-40kHz at temperature of 45-55 DEG C for 3-5 hours; and carrying out reduced pressure concentration on the extract, and recovering a reagent so as to be prepared into a caulis impatientis stock solution with the content of 1g / mL. When in use, Tween 80 with the concentration of 0.01% is added to the stock solution of the extract to be diluted by 10 times. The orange fruits are soaked in the diluent for 1 minute, dried in the air, and packed into polyethylene film bags. The caulis impatientis extract has stronger inhibiting effect on the post-harvest pathogenic bacteria, belongs to a natural plant extract, and is used for retaining the freshness of the oranges without chemical residuals, health hazard to human bodies, and environmental contamination.

The invention relates to the technical field of processing of silver products, in particular to a manufacturing method of antiqued silver. The manufacturing method comprises silver molding and burning steps, and further comprises acid washing and blackening treatment for silverwares, wherein the blackening treatment comprises the following steps: (1) 1-3 parts of potassium carbonate, 2-5 parts of sodium hydroxide, 25-35 parts of potassium sulfide and 60-70 parts of purified water are formed to mixed liquid; and the acid-washed silverwares are put in the mixed liquid for dipping 5-10 min; and (2) the surfaces of the dipped silverwares are polished. The silver products obtained by the method take an antiqued color; and the antiqued color of the antiqued silver products is pure, so that the silver products have another special fashion sense and excellent collection value; and the silver products obtained by the method have no any chemical residues, are healthy and environment-friendly, are more beneficial to the human health, and are better in health maintenance value.

The invention discloses a method for preparing a feed additive for milk cows through fermentation. The feed additive is prepared by carrying out microbial fermentation on a Chinese herbal medicine mixture, maize embryo dregs and phaseolus calcaratus and then mixing the fermentation product with mountain flour, zinc sulfate, calcium pantothenate, fish liver oil, sodium selenite, sodium bicarbonate, table salt and fumaric acid, wherein the Chinese herbal medicine mixture contains folium isatidis, mint, fried rhizoma chuanxiong, astragalus, codonopsis, ricepaper pith, akebiaquinata, cinnamon, dandelion, orange peel and angelica sinensis. The additive is prepared by using a microbial fermentation method; Chinese herbal medicines and effective ingredients in other auxiliary materials can be sufficiently absorbed by milk cows; and the feed additive is rich in various nutrient substances required by the growth of the milk cows, free of hormones and chemical residues and capable of promoting the health growth of the milk cows and increasing the yield of high-quality milk.