79results about How to "Will not affect the quality" patented technology

The invention relates to a method for continuously extracting functional components of chlorella vulgaris, which comprises the steps of enriching the chlorella vulgaris through the membrane separation technology, obtaining concentrated slurry of the chlorella vulgaris, adding a proper enzyme in a liquid phase system for wall-breaking, and using a solvent for extracting chlorophyll from chlorella vulgaris solution after wall-breaking, thereby being capable of obtaining a functional pigment product and reducing the color value of follow-up products; and firstly carrying out enzymatic hydrolysis on a water phase of the chlorella vulgaris after decoloring, then using the solvent for extracting functional grease, extracting active polysaccharides from the obtained degreased chlorella vulgaris by using the acid method, and then drying the other parts for obtaining crude proteins of the chlorella vulgaris. The main products comprise the chlorophyll, the active polysaccharides of the chlorella vulgaris, the functional grease of the chlorella vulgaris, the proteins of the chlorella vulgaris and the like, and the method optimizes the process on the basis of ensuring the activity of the functional components of the chlorella vulgaris, thereby obtaining high yield and reducing production cost.

The invention relates to a corn husk tobacco sheet and a production method thereof. The production method adopts the following steps: (1) the biodegradation and the extraction treatment are performed, wherein a. when a corn husk is heated to 55 DEG C in water, active enzyme is added; b. the mixture reacts for 2 hours at a temperature of 60 DEG C, and alcohol with the same amount of the water is added; c. biological enzyme is inactivated at a temperature of 90 DEG C to reclaim the alcohol; and d. the corn husk is dehydrated, and reaction extraction liquid is condensed to be pasty; (2) the corn husk after the treatment is produced into paper pulp; (3) the paper pulp is produced into a corn husk sheet; and (4) the pasty extraction liquid is coated on two surfaces of the corn husk sheet and is subject to drying treatment. The corn husk tobacco sheet has the advantages that the corn husk tobacco sheet is blended into tobacco to produce cigarettes, which can provide harmonious aroma for the cigarettes and excite sweet gas of smoke gas; and the corn husk tobacco sheet at least can substitute more than 5 to 15 percent of the using amount of the tobacco, and effectively reduce the smoke gas volume and harmful ingredients of one cigarette.

The invention relates to anatase-type titanium dioxide slurry, comprising the following components based on weight percentage: 65 to 70% of anatase-type titanium dioxide powder, 1 to 2% of dispersant, 0.1 to 0.3% of defoamer, 22.7 to 33.9% of water, and inorganic salt disperse regulator. The invention also relates to the preparation method of the anatase-type titanium dioxide slurry, comprising the following steps: the preparation before dispersion, namely, the dispersant, the defoamer and the water are added to a mixing tank and stirred at a low speed; low-speed dispersion, namely, during the process of low-speed stirring, inorganic salt disperse regulator is slowly added to the mixing tank, followed by anatase-type titanium dioxide powder after even stirring; high-speed dispersion, sanding and follow-up processing steps. As inorganic salt disperse regulator is added in the invention, under the condition of not changing the production technology of the traditional titanium dioxide powder and based on the original technology and equipment, the method of the invention can produce low-viscosity anatase-type water dispersible slurry with the content of titanium pigment up to 65-70%, with obvious social and economic benefits.

The invention relates to a seasoning control method. The method comprises the steps of setting at least one season type of wafer machining equipment according to requirements of technological operation before the wafer machining equipment is used for technological operation of a wafer, and setting a season condition and a season lot type corresponding to each season type at the same time; acquiring detection data information of the wafer machining equipment in real time; comparing detection data with each season condition to judge the season type needed by season operation of the wafer machining equipment, dispatching a corresponding season lot to the wafer machining equipment according to a season lot type corresponding to the season type, and continuing to use the wafer machining equipment to perform the technological operation on the wafer after the season operation is carried out on the wafer machining equipment; and carrying out the technological operation on the wafer directly with the wafer machining equipment if no detection data meet the season conditions. By means of the seasoning control method, human intervention is not needed in the whole seasoning process, and the utilizing rate of equipment is effectively improved.

The invention relates to a plant adsorbing material capable of reducing the lead content of a tree moss extract. The plant adsorbing material is characterized by being obtained through treatment, namely crushing, dilute acid soaking, filtration, ionized water washing, drying and the like by taking the leaves of ciliate desert-grass as raw materials. The lead content of the tree moss extract can be reduced by adding the plant adsorbing material to the tree moss extract for adsorption and then filtering to remove the plant adsorbing material. The plant adsorbing material disclosed by the invention has the advantages that the ciliate desert-grass is a heavy metal hyperaccumulator plant, has high adsorption effect on arsenic and lead and can release the adsorption site of a heavy metal contained in a material by being modified through dilute acid, the treated plant adsorbing material is capable of adsorbing lead ions contained in the tree moss extract by being added to the tree moss extract and the possibility of adding a non-plant source component to the tree moss extract is prevented. The plant adsorbing material disclosed by the invention has the advantages of low price of the used materials, easiness for operation of treatment means and obviousness in lead removal effect.

The invention discloses a method for prolonging the expiration date of a stannous sulfate product. The method comprises the following steps: (1) washing: carrying out concentration and crystallization and solid-liquid separation on a stannous sulfate solution, washing stannous sulfate crystal with an ethanol solution for 5-10 minutes, carrying out centrifugal separation and then drying; and (2) coating: after drying, uniformly spraying the stannous sulfate crystal with a 0.1%-0.3% hydroquinone solution and stirring for 10-20 minutes, then uniformly spraying a 0.1%-0.3% beta-naphthol solution and stirring for 5-8 minutes, finally, uniformly spraying a 0.05%-0.1% benzotriazole solution and adequately stirring for 10-20 minutes. By using the method disclosed by the invention, the quality of the product is not affected, the expiration date of the product is improved, the expiration date of the product is extended from the initial and optimal 5 months to 8-10 months.

The invention belongs to the field of gelatin preparation, and particularly relates to a production method of a pharmaceutical gelatin by an enzyme process. The gelatin prepared by the method can satisfy the index requirements of gelatins for pharmaceutical capsules. The method basically comprises the following steps: leather pretreatment, enzyme-process gelatin extraction, filtering, ion exchange, membrane concentration, straight plate drying, sterilization, gumming, drying, pulverization, and inspection to obtain the finished product. The leather treatment time is obviously shorter than that of the alkaline process, and the acid and alkali consumptions are greatly reduced; and besides, the yield of the high-quality gelatin obtained by the method is greatly enhanced.

A preparation method of low-As-content tree moss absolute oil comprises the following specific steps that 1, a tree moss raw material is soaked with water of 15-30 times of the amount of the tree moss raw material for 0.5 -2 hours, the soaked tree moss raw material is naturally air-dried, 100-mesh screening is performed after smashing, extraction is performed by using 65%-95% ethyl alcohol or petroleum ether, an extract is concentrated till no solvent is evaporated after extraction, and tree moss extract is obtained; 2, 95% ethyl alcohol 3-6 times of the mass of the extract is added to the tree moss extract for redissolution, freezing is performed at the temperature of 10-30 DEG C for 8-24 hours after full stirring and dissolution, insoluble substances are filtered out, the solution is concentrated till no solvent is dissolved, and the low-As-content tree moss absolute oil is obtained. The preparation method has the advantages that the operation is simple, the As content in the tree moss absolute oil is reduced under the coordinating effect of two treatment processes, no adverse influence is produced on the perfume quality of the final tree moss extract, the fragrance is purer, and the product quality is better. In addition, a preparation method is low in cost and suitable for large-scale industrial production.

The invention provides a natural gas desulfuration and liquid-removing device and a desulfuration technology thereof, and belongs to the technology field of chemical engineering. The natural gas desulfuration and liquid-removing device comprises a natural transportation pipeline, a gas-liquid separation tank, and a desulfuration device. The bottom of the gas-liquid separation tank is provided with a liquid collecting plate and an inverted U-shaped pipe, the separated liquid from the gas-liquid separation tank slowly drops into a lower cavity, which is arranged below the liquid collecting plate, through the inverted U-shaped pipe, then desulfurated natural gas in induced into the lower cavity, which is arranged below the gas-liquid separation tank, the liquid in the cavity is atomized through a huge flow of natural gas, and then the atomized liquid is brought back to the natural gas main pipeline with the desulfurated natural gas. The natural desulfuration and liquid-removing device and the desulfuration technology thereof have the advantages of low cost of desulfuration device, environment-friendly desulfuration technology, and resource saving.

The invention discloses a preparation method of minodronic acid for treating osteoporosis. The preparation method comprises the following steps of firstly, reacting a compound as shown in a formula (I) with 2-aminopyridine to obtain a compound as shown in a formula (II); secondly, hydrolyzing the compound as shown in the formula (II) obtained in the first step to obtain a compound as shown in a formula (III); thirdly, phosphorylating the compound as shown in the formula (III) obtained in the second step to obtain the minodronic acid, wherein X is chlorine or bromine, and R is alkyl radicals of C1 to C4; in the first step, a reaction promotor M is added and consists of one or more substances selected from zinc nitrate, silver nitrate and copper nitrate and one or more substances selected from glycine and alanine. According to the preparation method, the yield of a key intermediate in a preparation process of the minodronic acid can be greatly improved; the preparation method has the advantages of few side products, easiness in purification, mild conditions and higher reaction speed, and is suitable for large-scale production and popularization.

The invention provides a reusable reserved hole reserving device and a construction method. The device comprises an inner sleeve; a top sealing cover plate used for sealing the top of the inner sleeveis fixedly installed at one end of the top of the inner sleeve; the exterior of inner sleeve is sleeved with a rubber pipe; a long screw rod is installed in the middle of the top sealing cover platein a threaded fit mode; a top hexagonal head is arranged at the top of the long screw rod; and the long screw rod is sleeved with a nut. By the adoption of a steel sleeve reserving device, after concrete pouring is completed, a steel sleeve can be smoothly pulled out from an upper portion and repeatedly used, and the steel sleeve can be used as a pipeline wall bushing after a top cover and a handle are detached in the later period, so that the positive boosting effect is achieved on on-site environmental protection and civilized construction.

The invention provides a laser machining method, a laser machining device and a chip manufacturing method. According to the invention, machining grooves for segmenting a transparent substrate, such as a sapphire substrate, can be reliably formed, and the fusion layer on the cut surface of a chip can be lowered, thereby minimizing the quality degradation. A spacing track (4) of a wafer (1) is alternately provided with machining regions (G) for forming machining grooves (210) and machining start regions (H) for forming shallow grooves (211) which are shallower than the machining grooves (210), so that an irradiation point (P) of a laser beam can scan along the spacing track (4), thereby continuously forming the machining grooves (210) and the shallow grooves (210).

The invention discloses an improved molding method of an ETPU (expanded thermoplastic polyurethane) foaming body. The method comprises following steps: 1, TPU (thermoplastic polyurethane) particles are impregnated in high-pressure fluid, dissolution equilibrium of the high-pressure fluid in the TPU particles is realized, pressure of the high-pressure fluid is 70 MPa or lower, and temperature of the high-pressure fluid is 70 DEG C or lower; 2, the TPU particles reaching the dissolution equilibrium are refrigerated in a refrigeration storage, so that the high-pressure fluid in the TPU particlesis still retained in the TPU particles; 3, a certain quantity of TPU particles reaching the dissolution equilibrium are taken out from the refrigeration storage according to actual demands and subjected to molding in a steam foaming or die pressing foaming mode, and the ETPU foaming body is obtained. The improved molding method has the characteristics of better connectivity of the adjacent particles and low production cost.

The invention discloses a fan blade clamping tool, and relates to the field of mechanical devices. The fan blade clamping tool comprises a basal body, a connecting body, a mounting plate, mechanical arms and clamping devices. The connecting body is connected to the lower end of the basal body, the mounting plate is connected to the lower end of the connecting body through a rotating shaft, the mechanical arms are arranged below the mounting plate, and the clamping devices are connected to the tail ends of the mechanical arms. The clamping devices comprise sucking disc mounting bodies, suckingdiscs, vacuum generators and air pipes, wherein one ends of the sucking disc mounting bodies are connected with the tail ends of the mechanical arms, the other ends of the sucking disc mounting bodiesare connected with the sucking discs, the vacuum generators are arranged in the sucking disc mounting bodies, the bottoms of the vacuum generators communicate with the sucking discs, the air pipes penetrating through the sucking disc mounting bodies are connected to the two sides of the vacuum generators, and the air pipes are connected with an externally-connected air source device. The fan blade clamping tool has the advantage of being convenient in clamping, so that scratches do not exist on a fan blade.

The invention relates to a preparation method of a catalyst for lowering residual monomer N-vinyl-2-pyrrolidone in polyvinylpyrrolidone (PVP). The catalyst is prepared from the following raw materials in percentage by mass: 50-70% of refined kieselguhr, 5-20% of aluminiferous compound, 5-20% of binding agent, 1-2% of pore-enlarging agent and 10-20% of active component. The preparation method comprises the following steps: (1) measuring the refined kieselguhr, aluminiferous compound, binding agent, pore-enlarging agent and active component according to the percentage by mass, evenly mixing, and regulating with a diluter to obtain a paste material satisfying the extrusion requirement, wherein the diluter is hydrochloric acid, nitric acid or phosphoric acid; and (2) carrying out extrusion forming on the paste material obtained in the step (1), airing the parison, and roasting to obtain the catalyst. The catalyst provided by the invention can be used for lowering the content of the residual monomer N-vinyl-2-pyrrolidone in the PVP, wherein the PVP is PVP K15, PVP K30, PVP K60, PVP K90, PVP K120 or PVPP.

The invention provides a production process for a wood floorboard with lower hidden type plastic edges. The production process comprises the steps that (10) plate cutting is conducted, that is, a plate is cut to form a solid wood floorboard blank according to a predetermined size; (20) double-layer T-shaped grooves are formed, that is, the double-layer T-shaped grooves are formed in the four sides of the solid wood floorboard blank to make the four sides of the solid wood floorboard blank retract inwards one by one from top to bottom to form three layers of steps, and the width of the uppermost step on each side is largest; (30) injection molding and edge sealing are conducted, that is, the solid wood floorboard blank is placed into a mold cavity of an injection molding and edge sealing machine, the plastic edges are formed on the double-layer T-shaped grooves through the injection molding and edge sealing machine, and the plastic edges are hidden on the reverse side of the uppermost step on each side. According to the production process, reasonable rabbets are designed in the four sides of the wood floorboard, edge sealing plastic can be hidden below the upper surface of the wood floorboard after injection molding and edge sealing are completed, and the plastic edges can not be seen through naked eyes after the wood floorboard is laid.

The invention discloses a polishing robot for machinery construction. The polishing robot comprises a box body, both sides of the inner wall of the box body are fixedly connected with supporting columns, and the top ends of the supporting columns are fixedly connected with a working table; two sides of the top portion of the working table are slidably connected to slide bars through pulleys, and support rods are movably connected between one side of the inner wall of the box body and one side of the surfaces of the support columns; and cylindrical rollers are fixedly connected to the surfacesof the support rods. The invention relates to the technical field of engineering machinery. According to the polishing robot for the machinery construction, the support rods are movably connected between one side of the inner wall of the box body and one side of the surfaces of the support columns so that the interior of the entire box body can be kept clean and the work efficiency is greatly improved; and both sides of the inner wall of the box body are fixedly connected with the supporting columns and the top portions of the supporting columns are fixedly connected to the working table, so that no offset can occur, and polishing can be carried out according to the predetermined parallel plane and the quality of products cannot be affected.

The invention discloses a conveying device used for sheet glass production. The conveying device used comprises a conveying seat, a telescopic support plate and a locating plate. The telescopic support plate is fixed in the conveying seat. The locating plate is fixed to the upper end of the telescopic support plate. The conveying seat comprises a conveying plate, locating separation plates, protective frame and an opening-closing frame. The conveying plate is provided with the locating separation plates. The locating separation plates are located on the two sides of the telescopic support plate. The protective frame is fixedly connected with the front side and the rear end of the conveying plate. The opening-closing frame is arranged on the left side and the right side of the conveying plate. The telescopic support plate comprises a first fixed plate, a second fixed plate and a movable plate. The locating plate is provided with locating grooves. The conveying device is high in practicability. Not only is the stability of the conveying device during conveying work improved, but also the fixing effect is ensured. The conveying seat is arranged, so that sheet glass is conveyed through the conveying seat during the conveying process. Therefore, the step of manual conveying is reduced, and the risk of personal injury is reduced. The whole process is convenient to operate, and the stability of the conveying device for the sheet glass is improved.

The invention discloses a dustless cutting device for PVC (polyvinyl chloride) plates, and belongs to a cutting device. The device is characterized by comprising a motor, a transmission device and a rotating shaft, wherein the motor and the rotating shaft are connected by virtue of the transmission device; a rotating shaft lock nut is arranged on the rotating shaft; the transmission device is arranged on a slide rail; a sleeve is arranged on the rotating shaft; a protective cover is fixed outside the sleeve; a dust removal cylinder is arranged on one side of the protective cover, and communicated with the cavity of the protective cover; and a blade is connected with the sleeve in the protective cover by virtue of a connecting device. Compared with the prior art, the dustless cutting device for PVC plates has the characteristics that, since dust generated after cutting is discharged through the protective cover and the dust removal cylinder, noise is reduced, the dust is prevented from scratching PVC plates, and the product quality cannot be influenced; the cut PVC plates hardly slide after being stacked, so that potential safety hazard is prevented. Therefore, the device has great popularization and application values.

The invention discloses wicker product cleaning fluid which is prepared from the following raw materials: sodium salt, an organic compound, a surfactant, a natural preservative and water, wherein the mass ratio of the raw materials is (5 to 7): (2 to 4): 1: 1: 50. The wicker product cleaning fluid provided by the invention goes green, is environmentally-friendly and free from pungent smell and is outstanding in dirt cleaning effect; the dirt cleaning operation steps are simple, and no damage can occur to a wicker product; the wicker product cleaning fluid is suitable for the wicker product with relatively high value.

The purpose of the present invention is to improve the flavor of a fermented milk by employing a lactose degradation step and, further, adding a whey powder to a starting material to thereby control the balance between the sweetness and sourness of the fermented milk. A method for producing a fermented milk, said method comprising a step for adding a whey powder to a starting milk and a step for degrading lactose in the starting milk by a lactase. By use of the production method according to the present invention, a fermented milk, which can be appropriately taken without using a sweetener such as sucrose and has a novel flavor, can be obtained.

The invention discloses compound montmorillonite povidone iodine ointment for treating skin ulcers and a preparation method and application thereof. The ointment is made of, by mass, 70-90 parts of montmorillonite, 3-5 parts of povidone iodine, 3-6 parts of polyethylene glycol 1000, 3-6 parts of glycerin, 2-5 parts of poloxamer 188, 2-3 parts of potassium iodide and 400-500 parts of sterile water. According to the compound montmorillonite povidone iodine ointment, montmorillonite and povidone iodine are used as the effective constituents of the ointment and are made to the medicament with pharmaceutic adjuvant, external used medicines are delivered for skin, and the ointment has the effects of sterilization, drying and convergent granulation promotion for treatment of bedsores at different times and skin ulcers caused by diabetic complications.

A method for continuous extraction of functional components of chlorella, in which chlorella is enriched by membrane separation technology to obtain concentrated chlorella slurry, and appropriate enzymes are added to the liquid phase system to break the wall, and the broken chlorella Chlorella solution extracts chlorophyll with a solvent to obtain functional pigment products and reduce the color value of subsequent products; the decolorized chlorella is first enzymatically hydrolyzed in the water phase, and then the functional oil is extracted with a solvent to obtain defatted chlorophyll The active polysaccharides of the algae are extracted by an acid method, and the rest is dried to obtain the crude protein of the algae. The main products include chlorophyll, chlorella active polysaccharides, chlorella functional oils, chlorella protein, etc. On the basis of ensuring the activity of chlorella functional components, the process is optimized to obtain a higher yield and reduce Cost of production.

The invention discloses an adhesive pressing device for producing high-barrier spunlace medical protective clothing. The device comprises a machine frame, a heating mechanism for heating an adhesive tape and an adhesive pressing mechanism for pressing the adhesive tape on cloth; the heating mechanism and the adhesive pressing mechanism are both arranged on the machine frame; the machine frame is provided with a continuous adhesive feeding mechanism for uninterrupted continuous adhesive feeding; the continuous adhesive feeding mechanism comprises an adhesive feeding frame, an adhesive ejectingplate and a fixing disc; the adhesive ejecting plate is provided with a sliding rod; the sliding rod is arranged on the adhesive feeding frame and slidably connected with the adhesive feeding frame; the sliding rod is sleeved with an adhesive ejecting spring, and is provided with a limiting block, the adhesive feeding frame is provided with a top plate, and the adhesive ejecting spring is arrangedbetween the top plate and the limiting block; and the fixing disc is provided with a fixing shaft which is slidably connected with the fixing disc, and is further provided with a first electric pushrod which drives the fixing shaft to stretch in the fixing disc. Replacement of the adhesive tape and adhesive feeding can be facilitated, the production quality of the protective clothing is improved, and the production efficiency is improved.

The invention discloses dried konjac noodles and a preparation method thereof. The dried konjac noodles comprise the following components in parts by weight: 12-16 parts of konjac flour, 95-100 parts of starch, 5-10 parts of fish bone meal, 5-10 parts of yeast powder, 5-10 parts of licorice roots, 1-3 parts of dried orange peel, 2-5 parts of Chinese yams, 0.5-2 parts of hemp seeds, 5-10 parts of cortex magnoliae officinalis, 5-10 parts of immature orange fruits, 3-5 parts of a food emulsifying agent and 2-5 parts of a sodium bicarbonate solution. The preparation method comprises the following steps of (1) mixing the licorice roots with the dried orange peel, the Chinese yams, the hemp seeds, the cortex magnoliae officinalis and the immature orange fruits according to the formula, performing decoction, and collecting medicinal liquid; (2) mixing the konjac flour with the starch, the fish bone meal, the food emulsifying agent and the yeast powder to obtain a mixture, adding the mixture to the medicinal liquid, and performing standing and puffing; and (3) adding the sodium bicarbonate solution of which the concentration is 2% to puffed materials, performing mixing, performing stirring and dispersion, performing refining and extruding, and performing airing so as to obtain the dried konjac noodles. The dried noodles prepared by the method disclosed by the invention not only have high nutrient value but also are not liable to break.

The invention relates to a cutting sheet, a cutting sheet processing mold and a processing method. According to the cutting sheet, the cutting sheet processing mold and the processing method, powder and a bottom sheet are sintered into the cutting sheet by a pressing mold, a sintering mold and a cooling mold, specifically, the powder is pressed on the bottom sheet by the pressing mold, the powderis sintered and formed by the sintering mold, a knife particle is pressed into the designed shape by the cooling mold and through high pressure, a silver welding sheet is not needed compared with a silver welding sheet welding process, iron materials of iron, copper and the bottom sheet in metal powder of the sintering process form iron alloy, the adhesive strength of the knife particle and the bottom sheet is higher than that of the welding process, the process condition is not stricter than that of the welding process, a small amount of rust and oil dirt do not influence the product quality,the sintering process has little influence on the body health of workers compared with the welding process, the quality standard of the product can be improved by hot-pressing process, and the position, size and shape of the knife particle are guaranteed to meet the design requirement, so that the cutting sheet, the cutting sheet processing mold and the processing method are more suitable for different stone materials or ceramic tiles.

The invention discloses an environment-friendly aluminum alloy window, and relates to the technical field of doors and windows. The problem that existing potted plants are located indoors at night fora long time and consume oxygen, and consequently the indoor air quality is prone to being affected is solved. According to the key points of the technical scheme, the environment-friendly aluminum alloy window comprises window frames, two sash frames arranged between the window frames, two vertical plates fixedly connected to the two sides of the window frames, and sliding pots arranged on the vertical plates; and a plurality of receding holes penetrating through the vertical plates are formed in one sides of the vertical plates, supporting plates fixedly connected to the sides, close to theoutdoor space, of the vertical plates and horizontally arranged are arranged at the bottoms of the receding holes, and the top surfaces of the supporting plates are parallel to the top surfaces of thereceding holes. During the day, the sliding pots are pushed to slide inwards, so that plants in the sliding pots are located in the indoor space, indoor air can be improved through photosynthesis, during the night, the sliding pots are pushed to slide outwards, so that the plants in the sliding pots are located in the outdoor space, and thus the indoor air is not affected by the respiration of the plants at night.

Extruded ceramic bodies such as extruded honeycomb bodies formed of plasticized ceramic powder pastes made from paste batches comprising one or a combination of ceramic powders together with a water vehicle and a cellulose ether binder, wherein a high-molecular-weight polymeric dispersant is incorporated in the batches to reduce batch mixing torque and extrusion pressure while maintaining the stiffness and mechanical durability of the extrusions.

The invention belongs to the techncial field of preparation methods for synthetic sapphire crystals, and especially realtes to a preparation method for an alpha-aluminium oxide monocrystal, aiming to solve the technical problems on providing the preparation method for the alpha-aluminium oxide monocrystal with the characteristics of environment protection and stable product quality. The preparation method of the alpha-Al2O3 monocrystal comprises the steps of adding raw materials; inserting a seed crystal; sintering the crystal; crystallizing the chemical materials; expanding the center and the crystal; and carrying out isodiametric growth and the like, wherein the raw materials are delta-Al2O3 and the crystal for inserting is a seed crystal with the crystal orientation of 75-degree axis A. The invention can ensure that the qualification rate of the alpha-Al2O3 monocrystal is enhanced; the rejection rate is reduced; and the production cost is saved.

The invention discloses a breeding method of cold-resistant okra, which is characterized in that it includes the following aspects: (1) seed storage, treating the okra seeds with a gibberellin solution, mixing them with a culture medium for storage, and storing them in 2 Heating the colchicine solution at ‑4°C for storage; (2) Mutagenesis breeding, first spraying the seeds with active selenium solution, then irradiating them with ultraviolet light at varying temperatures, and finally irradiating them with gamma rays; (3) Pregermination, immerse the mutagenized seeds in gibberellin solution for constant temperature germination; (4) Breeding, breed and cultivate at a temperature of 3-5°C, and screen cold-resistant seeds; (5) Cross-breeding, mutagenized seeds The okra seeds, the third-generation seeds, and the fourth-generation seeds were crossed three times to obtain the fifth-generation seeds for large-scale planting.