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183results about How to "Preventive effect" patented technology

Method for extracting effective constituents from maca

The invention provides a method for extracting effective constituents from maca. The method includes the following steps that fresh or dry maca roots are taken as raw materials, the maca roots are washed, impurities are removed, an ethyl alcohol-water solution is used as homogenate liquid, the maca roots are homogenized, crushed and extracted, so that a homogenate extracting solution is obtained, filtering is conducted, filtering residues are mixed with an extraction solvent, negative pressure cavitation solid-liquid mixing cyclone extraction is conducted to obtain the extracting solution, the extraction solutions are combined and concentrated, a concentrated solution and a low-level solvent are mixed, then negative pressure cavitation liquid-liquid extraction is conducted, an extracting liquor is obtained, an extract is obtained after concentration, ethyl alcohol is added for redissolving, and thus a solution 1 is obtained; the extracted maca filtering residues are extracted again through hot water, an extracting solution is obtained after filtering, and a solution 2 is obtained after concentration; the solution 1 and the solution 2 are combined and dried, and extractives of the effective constituents of the maca are obtained. The method for extracting the effective constituents from the maca has the advantages that the technological process is simple, the production cycle is short, the effective constituents can be efficiently extracted, products can maintain the original flavor of the maca, used equipment is conventional equipment, production cost is low, and industrial production is easy to achieve.
Owner:INST OF MEDICINAL PLANTS YUNNAN ACAD OF AGRI SCI

Heat shield device for CZ-Si single crystal furnace

The invention relates to a heat shield device for a CZ-Si single crystal furnace and the device comprises an outer barrel, a heat protective layer, an inner barrel, a heat reflecting layer, a heat insulation pad I and a heat insulation pad II, wherein the heat reflecting layer is arranged between the outer barrel and the heat protective layer; the heat protective layer is arranged between the heat reflecting layer and the inner barrel; the heat insulation pad I is arranged between the outer barrel and the inner barrel at the upper end of the heat shield device; one end of the heat insulation pad I is tightly matched with the heat protective layer; the heat insulation pad II is arranged between the outer barrel and the inner barrel at the bottom end of the heat shield device; and one end of the heat insulation pad II is tightly matched with the heat protective layer. The heat shield device is characterized in that the action of the reflected heat radiation of a molybdenum sheet heat reflecting layer on crystals can be effectively prevented, the heat dissipation of crystals can be increased greatly and the crystal growth speed can be improved. A better heat preservation effect on the fused silica can be realized, the blow-in power consumption can be further reduced, and the production cost is saved. The heat shield device has low cost and is easy to realize.
Owner:内蒙古中环晶体材料有限公司

Method for preparing coating carrying growth factor on surface of bone injury repair material

The invention discloses a method for preparing a coating carrying out a growth factor on the surface of a bone injury repair material. According to the method, 5 to 100 unit films are formed on the surface of the material through a layer-by-layer self-assembly process; four layers of unit films comprise a polyelectrolyte layer (polycation layer with amino) with positive charges, a polysaccharide oxide layer (with negative charges), a growth factor embedding micro and nano particle layer with positive charges and a polysaccharide oxide layer (with negative charges) from inside to outside. Micro and nano particles with negative charges in the unit films are sandwiched between the two polysaccharide oxide layers with the negative charges through electrostatic adsorption, and the amino carried by the micro and nano particles can be covalently bound with the aldehyde group of polysaccharide oxides, so that the micro and nano particles are well immobilized in the unit films. The unit films can be covalently bound and crosslinked with each other through the polycation with the amino and the polysaccharide oxide with the aldehyde group, achieve an electrostatic adsorption effect due to opposite electric properties, and have strong binding force; and the coating is high in stability, slow in degradation, long and controllable in bone induction acting time and good in bone induction effect.
Owner:SOUTHWEST JIAOTONG UNIV

Pretreatment method of epoxy type plasticizer production wastewater

The invention provides a pretreatment method of epoxy type plasticizer production wastewater. The pretreatment method is characterized by comprising the following specific steps: step one, conducting acidification and demulsification on the epoxy type plasticizer production wastewater, conducting microporous aeration and oil removal firstly, removing oil by utilizing a full-automatic oil scraper, and adjusting the pH value of wastewater to be 4.5-5.5; and step two, pumping the wastewater treated by the step one into an air floatation device for air floatation treatment, wherein the chemical adding sequence in the operation of the air floatation device is as follows: adding polymeric aluminum firstly, then adding alkali liquor to adjust the pH value to be 7.5-8.5, and finally adding anionic polyacrylamide, and water discharged from the air floatation device is filtered by quartz sand; and step three, filling the wastewater treated in the step two to be full of a natural manganese sand filter tank by a mode of feeding from the lower part and the discharging from the upper part so as to remove residual hydrogen peroxide in the wastewater to obtain the pre-treated epoxy type plasticizer production wastewater. The pretreatment method has the advantages that the oil can be removed thoroughly, floatation slag generated by air floatation is obvious, the volume of the floatation slag is small after the floatation slag is discharged into a sludge drying bed to be concentrated, the treatment is easy and the like.
Owner:浙江嘉澳环保科技股份有限公司

Magnesium-calcium-zirconium brick manufactured by means of in-situ reaction and used for secondary refining and production method

The invention relates to a magnesium-calcium-zirconium brick manufactured by means of in-situ reaction and used for secondary refining and a production method. During manufacturing, 0-20% of 3 mm-5 mm magnesia particles, 30-55% of 1 mm-3 mm magnesia particles, 4-15% of 0.088 mm-1 mm fine magnesia particles, 2-10% of 0.088 mm-0.5 mm fine desilicated zirconia particles, 5-30% of magnesia powder with the diameter being less than 0.088 mm, 0-15% of calcium zirconate powder with the diameter being less than 0.088 mm, 2-9% of zirconia micro powder with the diameter being less than 0.020 mm, 2-8% of calcium carbonate micro powder with the diameter being less than 0.020 mm, 4-8% of additional waste pulp liquid and 0.2-0.05% of additional third-generation water reducing agents are used; during production, the adopted process includes the steps that firstly, the zirconia micro powder and the calcium carbonate micro powder are premixed; secondly, the 3 mm-5 mm magnesia particles, the 1 mm-3 mm magnesia particles and the 0.088 mm-1 mm fine magnesia particles are added to a mixing mill, and he waste pulp liquid and the third-generation water reducing agents are added to the mixing mill to be mixed; thirdly, magnesia powder with the diameter being less than 0.088 mm, calcium zirconate with the diameter being less than 0.088 mm and premixed zirconia-calcium carbonate micro powder with the diameter being less than 0.020 mm are add and mixed until the mixture is even; finally, forming, drying, 1580-1700 DEG C sintering and checking are conducted on the mixture to obtain a refractory material with periclase-calcium zirconate-baddeleyite as a main crystal phase. The magnesium-calcium-zirconium brick has the advantages of being convenient to manufacture, low in cost, simple to use and excellent in performance, has excellent anti-erosion performance and thermal shock resistance, excellent high-temperature physical and chemical stability, and is competent for the work of secondary refining to make clean steel.
Owner:RUITAI MATERIALS TECHNOLOGY CO LTD

Supersonic velocity detonation engine and propulsion system thereof

The invention discloses a propulsion system which comprises an air inlet channel, a combustion chamber and an expansion spraying pipe connected with the combustion chamber. A first hot jet flow spout allowing spraying of a hot jet flow is formed in the upper wall surface of the combustion chamber, a second hot jet flow spout allowing spraying of the hot jet flow is formed in the lower wall surface of the combustion chamber, after spraying the hot jet flows, the first hot jet flow spout and the second hot jet flow spout can induce a supersonic velocity incoming flow to form two strands of oblique detonation waves, and the two strands of oblique detonation waves can intersect in the middle of the expansion spraying pipe. According to the propulsion system provided by the invention, the first hot jet flow spout and the second hot jet flow spout are formed in the combustion chamber, the hot jet flows sprayed from the two hot jet flow spout induces the incoming flow to form the stable oblique detonation waves, and the oblique detonation waves produce regular reflection, so that the action of the detonation waves and a boundary layer is avoided, meanwhile, full combustion of incoming flow premixed gas is guaranteed, after combustion through the double oblique detonation waves, heat is released rapidly, expansion occurs to produce thrust, and the combustion efficiency is improved. The invention further discloses a supersonic velocity detonation engine comprising the propulsion system.
Owner:NAT UNIV OF DEFENSE TECH

Tube piercing device

The invention discloses a tube piercing device. The tube piercing device comprises a base, a fixed plate, a mandrel, a punch and a pressure plate, wherein the fixed plate is perpendicularly fixed on the base; the mandrel is fixed on the fixed plate; limiting blocks are arranged on the fixed plate; guide pillars are also arranged on the fixed plate; the pressure plate penetrates through the guide pillars and is slidably connected with the guide pillars; a die shank is fixed at the upper end of the pressure plate; a punch seat is arranged at the lower end of the pressure plate; the punch comprises a small punch and a large punch; a hollow cavity is formed in the mandrel; a through hole is formed in a position, which corresponds to the punch, of the mandrel and comprises a large through hole and a small through hole; an elastic piece is arranged in the hollow cavity and positioned at the through hole; the elastic piece is fixed on the mandrel and positioned on one side close to the small through hole; and a straight hole capable of allowing the small punch to penetrate through is formed in the elastic piece. Compared with the prior art, the tube piercing device has the characteristics that holes with different sizes and diameters can be formed in a tube by punching at a time, meanwhile, wastes generated by piercing can further be discharged out of the tube and the mandrel, and therefore, the tube piercing efficiency is greatly improved.
Owner:重庆鼎汉巅宏汽车零部件有限公司

Live bacteria type lotus seed and corn yoghurt beverage and preparation method thereof

The invention provides a live bacteria type lotus seed and corn yoghurt beverage which is a mixture prepared by using base fermentation material, and the like, wherein the mixture comprises following components by weight parts: 30 to 50 parts of base fermentation material, 3 to 8 parts of glucose syrup, 7 to 12 parts of white granulated sugar, 35 to 55 parts of drinking water, 0.3 to 0.6 parts of stabilizing agents, and a small amount of food flavors, wherein the base fermentation material is prepared by fermenting a stock solution of the base fermentation material, which is formed by mixing lotus seed slurry, sweet corn slurry and pretreated fresh milk; and the stock solution of the base fermentation material comprises following components by weight parts: 20 to 40 parts of lotus seed slurry, 30 to 45 parts of sweet corn slurry and 20 to 40 parts of fresh milk. A preparation method of the live bacteria type lotus seed and corn yoghurt beverage comprises the steps that the lotus seed slurry, the sweet corn slurry and the pretreated fresh milk are mixed to be homogenized, sterilized, and the like at high pressure, and then inoculated to be fermented; and then the base fermentation material, the glucose syrup, the white granulated sugar, the drinking water and the stabilizing agents are prepared to obtain the live bacteria type lotus seed and corn yoghurt beverage. The beverage is rich in nutrition and performs a certain health care function; and the preparation method is reasonable.
Owner:LIUZHOU SHENYING SCI & TECH
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