35results about How to "Won't crystallize" patented technology

The invention provides a stem cell cryopreservation liquid and a stem cell cryopreservation method, and the stem cell cryopreservation liquid comprises the following components by volume percentage: a serum-free GT-T551H3 culture medium containing 50%-60% of an alpha-MEM basic culture medium; 15%-20% of human serum albumin with a concentration of 15-35 g / l; 1% to 5% of sulfosalicylic acid; 5% to 10% of acetamide; 8%-12% of dimethyl sulfoxide; wherein the volume ratio of sulfosalicylic acid to acetamide is (1: 1)-(1: 10). The stem cell cryopreservation liquid provided by the invention has the advantages; the cell cryopreservation liquid does not contain animal serum, so that the risk of introducing pollution and allergens can be avoided, and the cell cryopreservation liquid has higher clinical safety compared with a conventional cell cryopreservation liquid; and the sulfosalicylic acid and acetamide components can prevent the cells from being damaged due to formation of ice crystals in the cryopreservation process.

The invention discloses a method for preparing tetrafunctional ketoximino silane in liquid state at room temperature, and aims to overcome the inconvenience brought by crystallization when tetrafunctional ketoximino silane is used for preparing quick-curing RTV silicon rubber. According to the method, diacetylmonoxime, methyl isobutyl ketoxime and No.120 solvent oil are pumped into an agitation reaction kettle as per certain proportion; under the condition of agitation, silicon tetrachloride and ammonia gas are added at the same time, the speed of adding silicon tetrachloride and ammonia gas is controlled to keep the reaction temperature at 20-80 DEG C; the reaction is stopped after completion of charging; filtration is performed to separate out a byproduct ammonium chloride so as to obtain a semi-finished product of tetrafunctional ketoximino silane; the semi-finished product is firstly placed into a first film evaporator to distil out the No.120 solvent oil, and then is placed into a second film evaporator to distil out excessive diacetylmonoxime and methyl isobutyl ketoxime, so that a product can be obtained. Tetrafunctional ketoximino silane prepared through the method has similar activity as tetrakis (methylethylketoximino) silane, and is free of crystallization at low temperature, so that the use is greatly facilitated.

The invention discloses a Chinese salad seasoning and a preparation method of the Chinese salad seasoning and belongs to the field of seasoning preparation. The Chinese salad seasoning comprises the following raw materials in parts by weight: 10-15 parts of freeze-dried powder of passion fruit aqueous extract, 6-8 parts of soybean tissue protein, 6-8 parts of dendrobium candidum, 15-20 parts of vinegar beans, 10-12 parts of table salt, 0.5-1 part of disodium5'-ribonucleotide, 10-15 parts of monosodium glutamate, 5-8 parts of spices, 10-12 parts of edible vinegar and 15-20 parts of camellia oil. The seasoning prepared according to the preparation method is rich in beneficial substances such as various amino acids, proteins, phospholipids and the like. Used for flavoring of the Chinese salads, the Chinese salad seasoning makes the Chinese salads delicious in taste. Moreover, the Chinese salad seasoning also has the functions of promoting the secretion of saliva or body fluid, nourishing the stomach, improving appetite, postponing senility and so on.

The invention provides a renewable energy hydrogen production and hydrogen storage system and its control method. The system includes a renewable energy power generation subsystem, a water electrolysis hydrogen production subsystem, a heat tracing subsystem and an organic hydrogen storage subsystem, wherein, The heat tracing subsystem is connected between the organic matter hydrogen storage subsystem and the water electrolysis hydrogen production subsystem, and part of the heat generated when the organic matter hydrogen storage subsystem generates hydrogenated organic matter is transferred to the water electrolysis hydrogen production subsystem through the heat tracing subsystem. Water electrolysis hydrogen production device heating. This scheme uses the heat generated when hydrogen reacts with organic matter to heat the water electrolysis hydrogen production device to ensure that the liquid in it will not freeze or crystallize in cold seasons. While ensuring the safety of the system, it can reduce the next startup time, thereby Improve the production efficiency of water electrolysis hydrogen production device. At the same time, part of the heat of the hydrogenated organic matter is used to heat the water electrolysis hydrogen production device, which reduces the amount of cooling water required for cooling the hydrogenated organic matter and improves the energy utilization rate of the system.

The invention provides an anti-impact wear-resistant adhesive coating and a preparation method thereof. The wear-resistant adhesive coating consists of a component A and a component B, wherein the component A is a mixture of 2 to 15 parts of aramid pulp, 20 to 70 parts of bisphenol A epoxy resin, 10 to 40 parts of bisphenol F epoxy resin, 300 to 400 parts of silicon carbide, 50 to 100 parts of alumina, 0 to 5 parts of silica and 0 to 5 parts of silane coupling agent; the component B is a mixture of 5 to 15 parts of polyamine, 1 to 5 parts of polythiol, 20 to 40 parts of alumina, 0 to 5 parts of silane coupling agent, 2 to 8 parts of curing accelerator and 0.5 to 5 parts of silica; and the weight ratio of the component A to the component B in the using process is 10:1, and a hard and wear-resistant composite coating material is formed by reaction and can be used for bonding, repairing and protecting a metal surface. The bisphenol A epoxy resin and the bisphenol F epoxy resin are used as an adhesive substrate, the aramid pulp is used as a toughening agent, and silicon carbide and alumina particles with different particle sizes are added, so that fine particles are filled in large interparticle gaps, bulk density is increased, and the strength and wear resistance of the wear-resistant adhesive coating are improved.

The invention discloses an immune cell cryopreservation solution and a cryopreservation method. The cryopreservation solution includes a basal medium and additional components, wherein the additional components include components with the following final concentrations: trehalose 1-5g / mL, propylene glycol 3 ‑6v / v%, acetamide 3‑5v / v%, dextran 5‑10v / v%, hydroxyethyl starch 1‑3g / mL, glucose 0.5‑1.5g / mL, heparin sodium 50‑150U / mL, pearl Grass extract 5-15mg / mL and BCG complex polysaccharide 0.5-1.5mg / mL. The formula of the cryopreservation liquid of the present invention is simple, and each component cooperates with each other and acts synergistically. Under the cryopreservation method provided, the cryopreservation effect of endothelial progenitor cells can be significantly improved, and at the same time, it can also ensure that the cell proliferation activity after recovery is not affected, ensuring that the cell Intracellular water does not crystallize near freezing point.

The invention discloses a polymer electrolyte capable of working in a wide temperature range, its preparation method and its application in a solid lithium (sodium) secondary battery. The polymer electrolyte of the present invention is prepared by in-situ polymerization on the surface of the substrate from a precursor solution containing polymerized monomers, initiators and electrolyte salts, and presents a hyperbranched structure with no main chain and multiple branches, and has ionic conductivity and It has the advantages of high migration number, wide electrochemical window, good mechanical strength, etc., and can work stably in the temperature range of -40-110°C. At the same time, the preparation method of the polymer electrolyte is simple, the conditions are mild, the preparation cost is low, the raw materials are easily available, and it is suitable for scale-up production. The polymer electrolyte of the present invention is used to construct a solid-state lithium (sodium) secondary battery, which can effectively widen the working temperature of the battery and improve the safety of the battery under extreme working conditions.

The invention discloses a cryopreservation solution for dental pulp mesenchymal stem cells, which comprises component A and component B, component A is a serum-free medium, and component B is composed of the following raw materials: titanate nanotubes, 5-phosphoric acid Adenosine Disodium, Vitamin E, 1,8‑Cineole, Glycerin. The cryopreservation solution of the present invention does not add animal serum, which avoids possible exogenous pollution caused by animal serum. The 1,8-cineole and glycerol in component B act synergistically to protect the water in the cells from crystallization when the cells are close to the freezing point and avoid structural damage in the cells. Added titanate nanotubes, disodium adenosine 5-phosphate, and vitamin E, on the one hand, can maintain a certain activity of cells during cryopreservation in liquid nitrogen and avoid cell apoptosis; Helps cells recover quickly and restore activity. The present invention also provides a cryopreservation method for dental pulp mesenchymal stem cells. The cryopreservation solution of the present invention does not require complex programmed cooling and is easy to operate.

The invention discloses equipment improvement for a P5000 machine BPSG process. The invention involves a P5000 machine body and two independent cabinets. A TEOS pipeline is installed above the P5000 machine body, the cabinets are internally equipped with a cabinet set having a vertical two-layer structure respectively, a liquid source stored steel cylinder is placed at the lower layer, the upper layer is equipped with a liquid source output pipeline system, and the liquid source output pipeline system is communicated with the steel cylinder. The invention also involves liquid source extraction pipelines mounted above the cabinets, one ends of the liquid source extraction pipelines are connected to the liquid source output pipeline system and the other ends are in butt joint with the TEOS pipeline, a heater is mounted at the lower layer of each cabinet set, the steel cylinder is placed in the heater, the liquid source extraction pipelines are wrapped by a heating tape, the cabinets are internally provided with a controller respectively, the controllers are in communication connection with the P5000 machine body, and the controllers control the operation of the heaters and the heating tapes. The equipment improvement can realize the BPSG process, also saves cost, and can achieve simple, reliable and efficient replacement of liquid sources.

The invention discloses a preparation method for a polyurethane air filter element of a car. The preparation method comprises the following steps: carrying out a 2-4 hours' reaction at 40-80 DEG C by utilizing 60-90 parts by mass of polyether polyol, 10-40 parts by mass of polyester polyol, 1-4 parts by mass of diethylene glycol, 2-6 parts by mass of triethanolamine, 2-8 parts by mass of black polyether slurry and 1-10 parts by mass of triethylene diamine, so as to obtain a solution A; carrying out a 4-8 hours' reaction at 60-100 DEG C to prepare a solution B; starting a glue-injection machine to carry out glue injection, wherein the mass ratio of the solution A to the solution B is 100:(15-30); after glue injection, inserting a filter paper element, and 6-8 minutes later carrying out demoulding to obtain the polyurethane air filter element. The preparation method is simple, convenient and feasible; the prepared solution B is prevented from crystallizing at -40 DEG C, so that a cumbersome working procedure of heating and dissolution in the preparation process is avoided, and the prepared polyurethane air filter element is high in flexibility and mechanical strength.

The invention discloses an anti-scaling agent for oil well silicate scale. The anti-scaling agent is prepared by compounding a component A, a component B and water according to the mass ratio of 1:1:2, wherein the component A represents random terpolymer the side-chain of which has carboxylic acid, sulfonic acid and carboxylic acid ester functional groups, and the component B represents phosphinocarboxylic acid compound containing a phosphoric acid group-PO(OH)2 and a carboxylic acid group-COOH. The invention is applied to the scaling prevention of a strong base ASP flooding block productionwell, efficiently prevents the silicate from scaling at a pump, a bar pipe and the like, reduces the frequency of operation because of scaling and prolongs the pump inspection period of the production well.