69results about How to "The production process is simple and controllable" patented technology

The invention discloses a nitrogen and sulfur-codoped graphene quantum dot and a preparation method thereof. The preparation method comprises the steps that after a precursor pyrene is mixed with 80-100 ml of fuming nitric acid, refluxing and stirring are performed, nitro functionalizing treatment is performed on the surfaces of pyrene grains, a reactant is taken out, filtered and deacidified, an appropriate amount of NaOH is added to regulate the PH value, dispersion treatment is performed by adopting 300-W ultrasonic waves, the reactant is transferred into a polytetrafluoroethylene tank for a hydrothermal reaction, and after natural cooling is performed, a reactant is taken out, filtered, dialyzed and then dried; after a graphene quantum dot is dissolved into an appropriate amount of deionized water, an appropriate amount of ammonia water is added according to the proportion of the reactant, uniform mixing is performed, the mixture and an appropriate amount of sublimed sulfur are fully mixed to be uniform through stirring, the mixture is transferred into a polytetrafluoroethylene tank, a hydrothermal reaction is performed for 24 h by keeping the temperature of 180 DEG C-200 DEG C, and after cooling is performed, a reactant is taken out, filtered and dialysed to obtain the nitrogen and sulfur-codoped graphene quantum dot. The preparation method is simple in synthesis process, high in yield and finished product rate, environmentally friendly, poisonless, few in impurity and capable of easily obtaining the raw materials.

The invention provides a nanometer striking pin capable of intensifying micro-power on the surfaces of substances. The nanometer striking pin is characterized by being a polymer molecule composed of an artificial synthetic material.

The invention provides a salicylic acid solubilizing slow-release composition. The salicylic acid solubilizing slow-release composition is prepared from a specific proportion of active ingredient salicylic acid, solubilizing slow-release agent poloxamer 407, a humectant, a skin feeling conditioning agent, a preservative system and deionized water. The salicylic acid solubilizing slow-release composition has the advantages that under the conditions without alcohol and at a low pH value, the salicylic acid is prepared into a stable, easy-to-use and low-irritant water-soluble liquid, gel, or an intermediate state between the water-soluble liquid and the gel; on one hand, the solubility of the salicylic acid in an aqueous phase can be significantly improved, thereby increasing the biological utilization rate of the salicylic acid, on the other hand, the irritation of the salicylic acid to the skin can be significantly reduced, thereby solving the technical problem of the high-concentrationsalicylic acid intolerance of wide crowds. In addition, the invention further relates to a preparation method and application of the salicylic acid solubilizing slow-release composition.

The invention relates to an experiment device for pretreatment on samples, and in particular to a functional pipetting head with double purification functions of ultra-filtration and solid extraction, and application of the functional pipetting head in pretreatment and quantitative analysis on a biological sample in the medicine analysis process. The functional pipetting head comprises a pipetting head body, a solid-phase extraction material and a hollow fiber membrane, wherein the hollow fiber membrane is arranged at the sharp end of the pipetting head body; an adhesive is uniformly applied at the cross part of the sharp end of the pipetting head and the hollow fiber membrane; an upper end opening and a lower end opening are formed in the hollow fiber membrane; the upper end opening is sealed; the lower end opening is kept in an opened state; the solid-phase extraction material is arranged inside the pipetting head body. The functional pipetting head is simple, convenient and controllable in manufacturing process, flexible in extraction condition adjustment, scientific and reasonable in method, convenient in obtaining materials, and good in application prospect.

The invention relates to a grinding wheel structure and a manufacturing method, and belongs to the technical field of grinding tools. The grinding wheel structure comprises a base and split type grinding blocks, dovetail grooves are formed in the base, a dovetail protrusion corresponding to the corresponding dovetail groove is arranged on the bottom of each grinding block, and the grinding blocks are fixed on the base through the matching of the dovetail protrusions and the dovetail grooves. Compared with the prior art, the split type structure is adopted by the grinding blocks, the notches of the dovetail grooves in the base are small in outside and big in inside, the grinding blocks are not fixed only through thermosetting resin, the grinding blocks can also be clamped through the shapes of the dovetail grooves, the grinding blocks can be fixed more firmly and prevented from falling off the base in a grinding process, the qualified rate is high, clearances are reserved between the grinding blocks and serve as interval grooves for draining water, lowering temperature and removing chips, and the service life is long. The split type grinding blocks are small in size, the manufacturing process is easier to control, the qualified rate is high, and the production cost is low.

The invention discloses a grinding wheel with a split dovetail groove structure. The grinding wheel comprises an annular metal base body (1) and a grinding wheel grinding layer fixed on the peripheral surface of the metal base body (1), wherein the grinding wheel grinding layer is formed by combining a plurality of grinding wheel grinding blocks (2); dovetail grooves (3) are formed in the peripheral surface of the metal base body (1); a dovetail bugle (4) is arranged at the bottom of each grinding wheel grinding block (2); the dovetail bugles (4) of the grinding wheel grinding blocks (2) are embedded into the dovetail grooves (3) of the metal base body (1); the grinding wheel grinding blocks (2) are fixed to the metal base body (1); gaps (5) are formed in the embedded parts of the dovetail bugles (4) and the dovetail grooves (3). According to the grinding wheel, the split dovetail groove structure is adopted, so that materials are saved and the use cost is reduced; the grinding wheel has the characteristics that the production investment is small, the cost is low, the manufacturing process is easy to control, the scrap rate is low and the safety is good.

The invention provides a novel nitride semiconductor microcavity laser structure capable of easily achieving electric injection maser and a preparation method thereof. According to the novel nitride semiconductor microcavity laser structure, any one or combination of two or more of materials, such as AlInGaN, ITO, AZO, IGZO, porous GaN, Ag, Al, ZnO, MgO, Si, SiO2, SiNx, TiO2, ZrO2, AlN, Al2O3, Ta2O5, HfO2, HfSiO4 and AlON is adopted as an optical limiting layer of a microcavity laser, so that the thermal resistance of the laser can be greatly reduced on the premise of ensuring strong optical limitation and the performance of a device is improved. The novel nitride semiconductor microcavity laser structure provided by the invention has the advantages of being small in thermal resistance andgood in stability and reliability, and electric injection is easy to implement, the performance of the nitride semiconductor microcavity laser can be greatly strengthened and the life of the nitridesemiconductor microcavity laser can be greatly prolonged.

The invention relates to a method for extracting essential oil of sesame and especially to a process for extracting volatile essential oil of sesame from natural sesame kernel adopting routine supercritical carbon dioxide extraction apparatus. The process consists of first cleaning the natural sesame kernel, removing the sand dust impurity and the surface impurity to obtain the pure sesame kernel, then bruising or comminuting the baked sesame kernel to half-sheet sesame powder, afterwards, placing the sesame powder into the supercritical carbon dioxide extraction kettle, controlling the abstraction pressure, temperature, carbon dioxide flux and abstraction time for extraction and separation, at the same time, in different pressure and temperature conditions, respectively collecting two-step extractants containing different components and volatility adopting two-step collecting kettle, then obtaining the essential oil of sesame by mixing the extractants collected by two-step collecting kettle. The process of this method is simple, safe and reliable, is of high yield rate and good quality, and can not destroy the edibility of the sesamin grease.

The invention discloses a production process of dry lotus root starch and belongs to a processing technology for agricultural and sideline products. The dry lotus root starch is produced by using dry lotus roots as raw materials. The production process comprises the specific flows of raw material pretreatment, soaking, squeezing, pulp washing, pulp bleaching, dehydration and washing, and drying. The production process has the beneficial effects that the dry lotus root starch is high in purity, small in nutrient loss, pure in taste, short in production period, and suitable for large-scale production; moreover, the production process is easy to control.

The invention relates to a III-V family nitride semiconductor epitaxial structure comprising a (1) substrate; (2) an epitaxial buffer layer; (3) an epitaxial transition layer; and (4) an epitaxial effective layer. The epitaxial buffer layer is provided with an upper surface and a lower surface which is contacted with the substrate. The epitaxial transition layer covers the epitaxial buffer layer, and a microscopic hole structure is arranged at the interface of the epitaxial transition layer and the epitaxial buffer layer. The microscopic holes are periodically or non-periodically arranged so that the interface of the epitaxial transition layer and the epitaxial buffer layer is enabled to be partially connected, and the connected parts and the hole parts appear in a spacing way at the interface. The epitaxial transition layer is provided with a flat upper surface. The epitaxial effective layer is arranged at the upper surface of the epitaxial transition layer. The epitaxial effective layer comprises an n-type epitaxial layer, a luminescent layer and a p-type epitaxial layer which are arranged from the bottom to the top. The invention also provides a manufacturing method of the epitaxial structure, a device comprising the epitaxial structure and a manufacturing method thereof.

The invention discloses a cotton and polyester cotton blended fabric pre-treatment method. The method comprises the following steps: blank cloth preparing, composite biological enzyme pre-treatment, piling, washing, drying, dip padding on ginned cotton enzyme, steaming, washing and drying. According to the invention, lignin, starch slurry, cotton wax and cottonseed hull on the fabrics are degraded and emulsified by using a compound enzyme system, cooperation usage of lignin enzyme and cellulase is helpful for removing lignin of cottonseed hull and fiber cell wall, the composite pectase is introduced into a primary cell wall layer so that the pectic substances are degraded, a channel to a fiber cyst cavity is opened, staple fiber on the surface of yarn beam is removed by cellulose, the problem of difficult removal of the cottonseed hull during bio-enzyme treatment is effectively solved, caustic soda, a chemical agent, steam, electric power, water volume and COD content of sewage are reduced, a production process is simple and controllable, the processing of the multi-fiber composite fabrics is simple and easy, and quality of the product is increased.

The invention belongs to the field of single rolled steel plate rolling processes in metallurgy industry, in particular relates to a bainite sheet steel produced by controlled rolling and cooling technology, and is characterized by comprising the following chemical components by weight: 0.02-0.08% of C, 0.25-0.55% of Si, 1.65-1.85% of Mn, not more than 0.015% of P, not more than 0.008% of S, 0.05-0.08% of Nb+Ti, 0.30-0.50% of Mo+Cr, 0.015-0.05% of Als and the balance of Fe and trace impurity elements, wherein C+Si/30+(Mn+Cr)/20+Mo/15 is not more than 0.25. According to the bainite sheet steel, the thickness specification range is 10-20 mm, the width of a finished product is not less than 0.85 time of nominal width of a rolling mill, unevenness of the steel plate is not more than 6 mm/m, the intensity index ReL is not less than 550 MPa, Rm is not less than 670 MPa, A is not less than 20%, and -20 DEG C Akv is not less than 200 J.

The invention discloses a fermentation culture medium for increasing ganoderic acid A in a liquid fermented ganoderma mycelium and a fermentation method. The fermentation culture medium contains the following components in percentage by weight: 2%-5% of corn flour, 1%-2% of soybean meal, 1%-3% of glucose, 0.1%-0.5% of potassium dihydrogen phosphate, 0.05%-0.1% of magnesium sulfate, 50ppm-100ppm ofvitamin B1, 200umol/L-300umol/L of jasmonic acid methyl ester, and the balance of water. By fermenting the ganoderma mycelium in the fermentation culture medium, the fermentation time can be prolonged, and a fermented ganoderma mycelium product of high-content ganoderic acid A can be obtained.

The invention provides a nitride semiconductor microcavity laser structure and a preparation method thereof. A microcavity laser is prepared on the (0001) nitrogen surface of a nitride semiconductor,and p-type ohmic contact on a (0001) gallium surface adopts a whole surface contact manner, so that the series resistance of the microcavity laser is greatly reduced; the heat of the microcavity laseris directly transferred into a heat sink with high heat conductivity, a microcavity laser is prepared on the (0001) nitrogen surface, and the side wall of the microcavity laser is manufactured by using a wet etching method, so that the stability of the microcavity laser can be greatly promoted, the optical limiting layer of the microcavity laser is prepared by using AlInGaN, ITO, AZO, IGZO, porous GaN, Ag, Al, ZnO, MgO, Si, SiO2, SiNx, TiO2, ZrO2, AlN, Al2O3, Ta2O5, HfO2, HfSiO4 and AlOH materials, and high optical limitation is provided. The novel nitride semiconductor microcavity laser structure provided by the invention has the advantages of low electric resistance, low thermal resistance, easy implementation of electric injection, high stability, high reliability and the like, the performance of the nitride semiconductor microcavity laser can be greatly enhanced, and the service life of the nitride semiconductor microcavity laser is greatly prolonged.