32results about How to "Coagulation does not occur" patented technology

The invention relates to cryopreservation protection liquid for Wharton jelly tissues of a human umbilical cord. The cryopreservation protection liquid comprises 5-10 percent of a permeable cryoprotectant, 1-5 percent of a non-permeable cryoprotectant, 10-20 percent of a knockout serum replacement and 70-80 percent of a serum-free basal culture medium. The invention also discloses a preparation method of the cryopreservation protection liquid. The preparation method specifically comprises the steps of (1) precooling the serum-free basal culture medium, the non-permeable cryoprotectant and the knockout serum replacement, mixing and uniformly shaking; (2) adding the permeable cryoprotectant; and (3) performing refrigeration under a temperature condition of 2-6 DEG C for more than 30min. The invention also discloses a cryopreservation method for the Wharton jelly tissues of the human umbilical cord by the cryopreservation protection liquid. The cryopreservation method comprises the following steps of (1) pretreating the umbilical cord; (2) peeling off the Wharton jelly tissues; and (3) cryopreserving the Wharton jelly tissues of the human umbilical cord. The cryopreservation protection liquid and the cryopreservation method which are used for treating the Wharton jelly tissues of the human umbilical cord have the advantages that injury to umbilical cord mesenchymal stem cells in a cryopreservation process can be alleviated, so that the activity and the clinical use safety of the umbilical cord mesenchymal stem cells are guaranteed.

The invention relates to a preparation method of naphthol AS. The method comprises a condensation process, an alkali cooking process, a filtration process, a drying process and a tail gas recycling process, wherein the condensation process comprises the following steps: 1) adding chlorobenzene and an organic solvent into a suspension pot; 2) after stirring and mixing, adding 2-hydroxy-3-naphthoic acid and an oil soluble ionic dispersant, stirring and adding aniline into the suspension pot; 3) filling materials in the suspension pot into a condensation reaction kettle and dropwise adding mixed liquid of phosphorus trichloride; 4) after the completion of dropwise adding of the mixed liquid of the phosphorus trichloride, heating with steam to obtain condensation materials. The preparation method of the naphthol AS provided by the invention has the benefits that a produced naphthol AS product has good quality and high yield; as the oil soluble ionic dispersant and the organic solvent are added in the condensation process, the dispersion of particles in suspension liquid is more uniform, and the coagulation phenomena cannot occur, so that the condensation process reaction is complete, the time of the condensation process is shortened, and the economic benefit is improved.

The invention relates to the technical field of cosmetics, in particular to an antibacterial and moisture preservation mask with the mild touch sense and a manufacturing method thereof. Glycerol contents are not added in a product; after the face is coated with the mask, the touch sense is mild but not sticky or greasy; under the effects of emulsifying and thickening ingredients such as acrylic ester/vinyl isodecanoate crosslinked polymers, dimethicone, carbomer and butanediol, after the still standing for 4 to 8 h after the coating of the product, the surface layer is in a half solidified state; the influence of the product on bedding, mattress and pillows under unconscious actions during deep sleeping can be reduced. In addition, through the use of nanometer silver with strong antibacterial and bactericidal effects, the complementary effect is achieved with allantoin, and D-panthenol antibacterial and bactericidal ingredients in the formula, so that the antibacterial and bactericidalcapability of the product is improved. The synergistic effect is achieved with moisture preservation ingredients of trimethylglycine trimethylglycocoll, phycite, sodium hyaluronate and the like in the product; the skin fine blood vessels, inflammation or acne are fast restored; meanwhile, watery and glossy states are restored.

The invention belongs to the technical field of engineering construction and specifically discloses a grouting pipe bit for road construction. The grouting pipe bit comprises a drill bit main body, wherein a first chamber is formed in the drill bit main body; a high-pressure runner which is connected with the first chamber is formed on the drill bit main body; a high-pressure nozzle is arranged inthe high-pressure runner; a drill tip is arranged on the lower part of the drill bit main body; a second chamber is formed in the drill bit; the first chamber is connected with the second chamber; anauxiliary grouting hole which is connected with the second chamber is formed on the drill tip; a hydraulic control cut-off unit and a grout backflow unit are arranged in the second chamber. The grouting pipe bit with such a structure is capable of solving the problem of pipeline blocking caused by the stagnation and solidification of residual grout in the channel during high/low pressure conversion process.

The invention discloses a spicy hot pot seasoning and a preparation method thereof, wherein the spicy hot pot seasoning is prepared from the following raw materials in parts by weight: 45-55 parts ofsalad oil, 25-35 parts of beef tallow, 3-7 parts of onion, 3-7 parts of garlic, 2-4 parts of ginger, 7-13 parts of chili pepper, 50-80 parts of oyster oil, 5-10 parts of rock candy, 5-10 parts of zanthoxylum bungeanum, 0.1-0.3 part of radix angelicae, 0.8-1.2 parts of star anise, 0.3-0.7 part of fennel, 0.05-0.2 part of clove, 0.4-0.6 part of bay leaf, 0.1-0.3 part of amomum tsao-ko, 0.1-0.3 partof lemongrass, 1-3 parts of cassia bark, 0.1-0.5 part of nutmeg, 1-3 parts of amomum cardamomnm, 0.5-2 parts of pericarpium citri reticulatae, 0.1-0.3 part of alpinia hainanensis, and 0.5-2 parts of piper longum l. The spicy hot pot seasoning not only has bright red color and luster, but also tastes delicious, mellow and soft, has high nutritional value, and does not easily cause the symptom of gastrointestinal discomfort after being eaten.

The invention discloses a biological viscosity-reducing agent for seatangle composed constituents with weight percent as: 50-60% biochemical seatangle viscosity liquid, 2-15% vitamin H, 3-15% kerogen, 10-25% emulsifier OP-10, with activity performance index: water wetting contact angle less than 70Deg, medium wetting 75-125Deg, and oil wetting contact angle more than 125Deg. The opposite preparation comprises: selecting dried seatangle of 50-60% full weight; cleaning, smashing; bathing with sodium hydroxide to separate seatangle viscosity; taking biochemical emulsification treatment with proper other said material. This product has well viscosity reduction effect to solve existing problem in oil refining with high economic and social benefits.

The invention relates to an anesthesia breathing mask. The anesthesia breathing mask comprises a rigid mask body, a soft annular sealing part used for covering the mouth and the nose of a user is arranged on the mouth edge of the open end of the rigid mask body, an air supply connecting pipe is at least arranged on the mask body, a catheter seat is arranged on the mask body, a central hole of thecatheter seat serves as a rigid pore passage enabling the inner face and the outer face of the mask body to communicate, a soft diaphragm of an annular-strip-shaped structure is arranged in the rigidpore passage, the periphery of the soft diaphragm is fixed to the inner wall of the rigid pore passage in a closed mode, an annular filling cavity is defined by a rigid inner wall area, between the upper edge and the lower edge of the diaphragm, in the rigid pore passage and the diaphragm, the outer surface of the diaphragm arches towards the center of the central hole and forms a sealing fit holeallowing a catheter to penetrate, a connecting hole allowing liquid or gas in the cavity to communicate with the outside is formed in the side wall of the filling cavity, and a ventilation connectingpipe communicating with the outside is connected to the connecting hole.

The invention discloses a calf artery blood sampling method. The calf artery blood sampling method includes the following steps that 1), a blood collecting barrel is washed with pure water 2-3 times,then the blood collecting barrel is soaked with 75% medical alcohol for 30-50 min, and the blood collecting barrel is put in a clean region for use after being dried; 2), a medical silicone tube and ablood receiving tool which are soaked with 2% sodium hydroxide are flushed with pure water 2-5 times, and then a blood drawing tool and a blood sampling tube with the two ends seal-bound by tin foilpaper are put in a high-pressure sterilization pot to be sterilized for use; 3), a calf is put on an operating table, conventional skin preparation is carried out on the neck artery of the calf, and then the skin is disinfected with a 5% bromogeramine solution; 4), after the skin is disinfected, the neck of the calf is cut up, an artery blood vessel is found, a small opening is cut up, the medicalsilicone tube is inserted into the small opening, the other end of the medical silicone tube is put in an inlet of the blood collecting barrel, and blood sampling is carried out. By means of the blood sampling method, rapid blood sampling can be achieved, the blood sampling amount is large, blood samples are not easily contaminated, and the method is suitable or large-scale use and popularization.

The invention relates to an antistatic agent for a spandex oiling agent and a preparation method of the antistatic agent. The antistatic agent for the spandex oiling agent is prepared by the followingsteps: reacting a hydrogen-containing siloxane polymer with an epoxy compound with double bonds to prepare an epoxy siloxane polymer, then distilling to remove unreacted residual raw materials, so asto obtain the epoxy siloxane polymer for the next reaction, reacting organic carboxylic acid with organic tertiary amine to obtain an organic acid quaternary ammonium salt, and finally, reacting theepoxy siloxane polymer with the organic acid quaternary ammonium salt to obtain the antistatic agent for the spandex oiling agent. The antistatic agent for the spandex oiling agent not only has good antistatic performance, but also can be stably dispersed in basic components of the spandex oiling agent, does not coagulate after being placed for a long time, and can be widely applied to the technical field of spandex oiling agent auxiliaries.

The invention relates to a metal surface alloying method for promoting molten pool convection by adopting non-uniform heat sources. The method comprises the following steps that 1) a metal surface isheated by adopting a first heat source and molten to form a molten pool; 2) alloying gas enters the molten pool to carry out reaction to generate a high-melting-point compound, the compound has the tendency of solidifying to form a solidified layer, an area where the compound is located is heated by adopting a second heat source, it is guaranteed that the compound is not solidified, convection ofthe molten pool is promoted, an alloyed layer uniform in component and structure is formed, the first heat source and the second heat source are sequentially arranged in a heat source moving direction, and the power density of the second heat source is larger than that of the first heat source; and 3) the first heat source and the second heat source integrally move along the heat source moving direction, and the molten pool is solidified to form an alloyed layer. According to the method, laser gas alloying is carried out on the metal surface by adopting the non-uniform heat sources, and finally the alloyed layer with good structure and performance is obtained.

The invention discloses an anti-solidification large-temperature-difference LNG cold energy recovery heat exchanger. The recovery heat exchanger comprises a heat exchanger cavity, an intermediate medium is injected into the cavity, the upper portion of the cavity is an intermediate medium gas phase area, the lower portion of the cavity is an intermediate medium liquid phase area, an LNG coil pipe and an NG coil pipe are arranged in the gas phase area, and a heating medium coil pipe is arranged in the liquid phase area; a baffle is arranged on the upper portion of the heat exchanger and divides the upper portion of the heat exchanger into an LNG heating area and an NG heating area, the tops of the LNG heating area and the NG heating area are communicated, an LNG coil pipe is arranged in the LNG heating area, an NG coil pipe is arranged in the NG heating area, and the top of the LNG coil pipe is in communication with the bottom of the NG coil pipe; and a heat insulation baffle is arranged on the lower portion of the heat exchanger cavity and connected to a baffle, the lower portion of the heat exchanger is divided into a mixed preheating area and an evaporation area through the heat insulation baffle, the two areas are communicated at the bottom, a low-temperature heating medium coil is arranged in the mixed preheating area, and a high-temperature heating medium coil is arranged in the evaporation area. According to the recovery heat exchanger, solidification-free efficient recycling of LNG cold energy under the large temperature difference can be achieved, and a secondary refrigerant needed by ice making or air conditioning and the like can be directly prepared.