68results about How to "Stable at room temperature" patented technology

The invention relates to an edible composition, in particular an edible composition containing active bacterium and suitable for all people, and its preparing process which comprises, (1) bacterial strain screening, bacterium culturing, (3) viable bacteria powder preparation, (4) preparation of edible compositions.

An anthropomorphic phantom used as a training tool by healthcare workers for learning ultrasonic imaging procedures. The phantom is made of a moldable, elastomeric tissue-simulating chemical composition that may be easily processed to create an anthropomorphic phantom: that has the “look and feel” and self-sealing characteristics of human tissue. During the mixing processes, scattering agents and pigments may be added to provide a phantom that simulates the sonographic characteristics on living tissue. The phantom body may contain objects and empty or liquid filled cavities and conduits that simulate normal internal structures and abnormal artifacts and conditions. In one embodiment, hollow rods are disposed longitudinally inside the primary mold that forms blood vessels inside the phantom. When the phantom is removed from the primary mold, the hollow rods are removed thereby forming a hollow conduit. Two plugs may be inserted into the ends of the conduit to hold a blood simulating liquid placed inside the conduit.

The present invention relates to fluorine-containing asymmetric aromatic diamine, a preparation method and an application thereof in the synthesis of polyimide. The compound has a constitutional formula as shown in the right. The preparation method comprises the following steps: (1) 2, 6-dimethyl phenol, paranitrobensoyl chloride and alchlor have catalytic reaction in an organic solvent to prepare (4'-hydroxy-3', 5'-dimethyl benzene)-(4-nitrophenyl) ketone; (2) the (4'-hydroxy-3', 5'-dimethyl benzene)-(4-nitrophenyl) ketone reacts with 2-chlorine-5-nitro trifluorotoluene with alkaline, to prepare (3', 5'-dimethyl-4'-(4''-nitro-2''-trifluoromethyl phenoxy) benzene)-(4-nitrophenyl) ketone; (3) the prepared product in the second step is reduced by reducing agent with organic solvents and catalysts; thus the fluorine-containing asymmetric aromatic diamine can be prepared. The fluorine-containing asymmetric aromatic diamine can be used for preparing fluorine-containing polyimide. The fluorine-containing asymmetric aromatic diamine prepared in the method has high purity and can keep stable at the room temperature; the polyimide made of the fluorine-containing asymmetric aromatic diamine has excellent solubility, film forming capability, optical transparency, mechanical properties and heat resistance.

The invention relates to the field of a mesoporous material, and in particular relates to a mesoporous titanium dioxide material and a preparation method thereof. According to the mesoporous titanium dioxide material disclosed by the invention, an aperture is 10-30nm, a specific surface area is 63-235m<2> / g and a pore volume is 0.55-1.02cm<3> / g. Compared to a current mesoporous titanium dioxide material, the mesoporous titanium dioxide material disclosed by the invention greatly improves specific surface area, aperture and pore volume; the preparation method comprises the following steps: preparing titanium peroxide acid sol through titanic acid and hydrogen peroxide, forming an self-assembling system through titanium oxide acid sol and a surfactant, and drying and baking the self-assembling system to obtain the mesoporous titanium dioxide material; the method is simple and easy to implement; moreover, the entire preparation process is free from other organic chelating agents or inorganic additives and mineral acids; the preparation system is a pure water system which is independent from any other non-polar or weak-polar solvents; and in addition, the titanium peroxide acid sol prepared is relatively stable at room temperature, and control process is relatively simple.

The invention provides a Fe3O4 nanozyme with improved catalytic activity, and a preparation method and application thereof. By doping metal elements in Fe3O4 nanozyme, the dismutase activity of peroxidase, catalase and / or superoxide can be improved; the metal element doped Fe3O4 nanozyme can be prepared in large quantities, has low cost, good stability at room temperature, good safety, and good economic value and application prospect.

The invention discloses a slurry bed hydrogenation catalyst, and preparation, a design method and a use thereof; the catalyst includes the following components: a catalyst main body, molybdenum-containing red mud or hematite powder, a carrier and activated carbon; the molar ratio of a metal center Fe to the other metal center Mo in the red mud or hematite is 1:150 to 1:200, the mass ratio of the catalyst main body to activated carbon is 0.2:1 to 1.1:1, and the activated carbon has the pore size of 1-100 nm. The preparation method includes the following steps: firstly, preparing the molybdenum-containing red mud or hematite powder, then adding activated carbon with the particle size of 50-150 [mu]m into the molybdenum-containing red mud or hematite powder, mixing evenly, and thus obtaining the slurry bed hydrogenation catalyst. The slurry bed hydrogenation catalyst has the advantages of low cost, simple preparation method, and easy storage and transportation, can be discarded and has no need of recycling, is applied to heavy oil slurry bed hydrogenation, coal direct liquefaction and oil coal mixing, and achieves quite high residual oil / oil coal conversion rate and liquid yield.

The invention belongs to the field of a biodegrade high polymer material and especially relates to an ultrathin ultra-transparent full-biodegrade film blowing level material and a preparation method thereof. The material is prepared from the following raw materials: poly-adipic acid / butylene terephthalate, polylactic acid and special reinforced and toughened anti-reflection master batch. The preparation method of the film blowing level material is simple and is easy in operation; an ultrathin film in the thickness below 6um can be directly blown; the acquired film is stable under normal temperature, can be stored for 12 months in dark place, has excellent mechanical properties and can be widely applied to the fields, such as, film packaging, shopping bag, agricultural plastic mulching film and garbage classification backfilling compost treatment.

The present invention relates to a self-adhesive article comprising a non-random fabric of bundles of carbon fibres and a thermosetting epoxy resin composition. The self-adhesive article exhibits high surface adhesion and excellent dimensional stability at room temperature. The self-adhesive article is ideally suited to reinforce structural components, particularly vehicles or ancillary vehicle components. The structural components reinforced by the self-adhesive article exhibit improved impact and torsional strength.

The invention discloses polycondensation type single-component silicon rubber capable of being vulcanized at room temperature and under a heating condition, and belongs to the field of silicon rubber materials. The polycondensation type single-component silicon rubber is prepared from the following raw materials: a reactive basic polymer, a filler, a crosslinking agent, a coupling agent, a catalyst and an inorganic compound with crystal water. A preparation method of the polycondensation type single-component silicon rubber comprises the following steps of: (1) uniformly stirring the reactive basic polymer, the dry filler and the inorganic compound with the crystal water under a moisture-insulating condition to obtain a mixture; and (2) adding the crosslinking agent, the coupling agent and the catalyst into the mixture, and stirring and mixing uniformly under the moisture-insulating condition to obtain the polycondensation type single-component silicon rubber. The polycondensation type single-component silicon rubber can be stored in a rubber pipe at room temperature for not less than half a year and is stored at room temperature very stably; and after being extruded out of the rubber pipe, the rubber material can be dried superficially at room temperature within half an hour, can be completely vulcanized for 7 days and can be vulcanized deeply and quickly within several hours under a proper heating condition, so that the deep vulcanization cycle of the rubber material is effectively shortened.

The invention discloses nanometer tungsten powder and a method for preparing the nanometer tungsten powder by the adoption of a sol-gel hydrogen reduction method. Ammonium tungstate and citric acid are utilized to generate a complex, and hydrogen low temperature sintering is carried out on the complex to be restored. The method comprises the steps that the ammonium tungstate, the citric acid and distilled water are mixed, and after mixing and regulating of the pH value, constant-temperature concentration is carried out to form wet gel; the wet gel is dried in a drying box to form dry gel; the dry gel is sintered in a muffle furnace to obtain a predecessor; the predecessor is sintered and restored according to a preset sintering temperature in a vacuum sintering furnace with argon and hydrogen mixed gas protection to obtain the nanometer tungsten powder. The preparation method is simple in operation, low in temperature, capable of regulating the yield according to the size of a chamber of the furnace, and good in temperature stability of a tungsten powder room.

The invention discloses an energy-saving environmental-friendly material which comprises the following substances in parts by weight: 6-8 parts of sepiolite, 4-9 parts of wood fibers, 4-6 parts of silicate, 2-4 parts of calcium carbonate powder, 1-6 parts of silica-aluminum oxide powder, 3-6 parts of foam cement, 3-6 parts of river sand micro powder, 7-8 parts of crushed crude pearlite, 2-4 partsof a water-retaining agent, 2-5 parts of an anti-cracking agent, 3-6 parts of hollow glass beads, 2-6 parts of polyphenyl granules, 10-14 parts of diatomite, 6-8 parts of gypsum powder, 1-2 parts of kaolin and the balance of water. Compared with the traditional technology, the energy-saving environmental-friendly material disclosed by the invention has excellent thermal insulation property, anticorrosive function, excellent non-inflammability and high social benefits and economic benefits and is long in service life and resistant to aging.

The invention discloses a preparation method of a PVC modified sheet and aims at increasing the toughness, the strength and the stretchability of the PVC sheet and greatly improving the weather fastness of the sheet. The PVC modified sheet is prepared from the following raw materials in parts by weight: 110 parts of PVC powder, 5 parts of a plasticizer, 1 part of an inner lubricant, 0.6 part of an outer lubricant, 5 part of a flexibilizer, 2 parts of processing aid, 3 parts of a stabilizer, 0.5 part of pigment and 7 parts of an enhancer. The produced PVC modified sheet has the advantages of better mechanical properties, light weight, easy molding, simple process, low cost and the like.

The invention discloses water varnish for protection of a printable aluminum foil for drug packing and a preparation method of the water varnish. The water varnish comprises the following components by weight percentage: 10-54% of polyolefin emulsion, 10-40% of polyester emulsion, 0-10% of water-based blocked isocyanates, 1-5% of water soluble amino resin, 0-10% of water-based epoxy resin, 0.1-0.5% of auxiliary, 0.5-1% of viscosifier, 4-10% of polyhydric alcohol, 12-40% of alcohol diluent and 12-40% of water. The curing speed of the water varnish is high, and the heat resistance is high when a bubble cap and the aluminum foil coated with a VC layer are subjected to heat sealing; the surface tension (smoothness) can be adjusted within a certain scope, so that different surface printing requirements can be met, and the surface printing adaptability is high; an adhesion force between the water varnish and the surface of the aluminum foil is high, the transparency is good, the friction resistance is high, and the solvent resistance is good.

The invention discloses an energy-saving and environmentally friendly material. The material comprises 5 to 10 parts of sepiolite, 5 to 10 parts of wood fibers, 15 to 20 parts of diatomaceous earth, 3 to 5 parts of calcium silicate powder, 3 to 5 parts of silicon aluminum oxide powder, 3 to 5 parts of river sand micro-powder, 10 to 12 parts of cement, 10 to 14 parts of porous expanded perlite powder, 3 to 5 parts of sodium polyacrylate, 5 to 8 parts of an anti-cracking agent, 3 to 6 parts of glass beads, 5 to 8 parts of gypsum and 5 to 10 parts of a flame retardant. The energy-saving and environmentally friendly material has a wide application range and is not limited to the external wall heat insulation of the building. The material can effectively protect a main structure, can resist fire and water, is conducive to maintaining stability at the room temperature, is not hot in summer, is not cold in winter, and can realize energy saving and environmental protection.

The invention discloses a modified PVC sheet. The toughness, strength and tensile property of a PVC sheet are improved, and the weather resistance of the sheet can be greatly improved. The sheet comprises the following raw materials in parts by weight: 110 parts of PVC powder, 5 parts of a plasticizer, 1 part of an internal lubricant, 0.6 part of an external lubricant, 5 parts of a toughening agent, 2 parts of a processing agent, 3 parts of a stabilizer, 0.5 part of a pigment and 7 parts of a reinforcing agent. The product has the advantages of higher physical properties and mechanical properties, lightweight, high easiness in forming, simple process, low cost and the like.

A medical aqueous (or alcoholic) solution of baicalin zinc complex is prepared through dissolving the baicalin zinc in the alkali solution of sodium hydroxide (or carbonate), and regulating pH value by hydrochloric acid or acetic acid.

The invention discloses a fireproof plastic used for household power supply socket housings, and belongs to the technical field of plastic. Combustion is easily caused because of long term using of conventional household power supply socket housings. The fireproof plastic comprises following ingredients, by weight, 30 to 35% of polypropylene, 30% of polyethylene, 10 to 12% of a phase solvent, 5 to 6% of a reinforcing agent, 2 to 3% of an anti-aging agent, 5 to 6% of a degreasing agent, 5 to 6% of a flexibility agent, and 5 to 10% of poly hydroxy amide (PHA). The high molecular compound poly hydroxy amide is added, normal temperature properties are stable, and polymerization is caused under high temperature so as to release a fire retardant.

A device for assaying biological fluids for molecules contained therein comprising a container, material situated in the container for absorbing fluid and in communication with an antibody or antigen impregnated matrix, wherein the matrix is accessible to the exterior of the container through a funnel shaped aperture in the roof of the container. Further features include a chemical drying agent associated with the container for absorbing moisture, thereby preventing inactivation of the assay reagents, and a filter situated above the antibody or antigen impregnated matrix, and in communication with the matrix through the aperture in the roof of the container. The filter removes interfering substances present in the biological fluids, and provides protein blocking agents to the matrix material for decreasing the background of the assay.

The invention relates to the technical field of intelligent control, and discloses a control method for an air conditioner compressor. The control method comprises the following steps that a first correction temperature is obtained according to the first actual temperature of an inner coil pipe and an amplitude reduction correction value; when the first correction temperature is larger than the first preset temperature, the compressor is controlled to operate at a first frequency reduction speed in a frequency reduction mode; a second correction temperature is obtained according to the second actual temperature of the inner coil pipe and the amplitude reduction correction value; a second temperature difference is acquired; and when the second temperature difference is smaller than or equal to the first set temperature difference, the compressor is controlled to operate at a second frequency reduction speed in a frequency reduction mode. In the frequency reduction operation stage of the compressor, the temperature rise amount within the set detection interval duration is used as a switching parameter of fast frequency and slow reduction, the lag degree between the temperature of the inner coil pipe and the frequency rise of the compressor is reduced, and the phenomenon of dead halt caused by too fast reduction of the frequency of the compressor is avoided; On the basis, the actual temperature of the inner coil pipe can be subjected to amplitude reduction correction, and the stability of the compressor is improved. The invention further discloses a control device and the air conditioner.

An eye drop composition for treating glaucoma is disclosed. The eye drop composition includes a prostaglandin analogue, a thickening agent, and a solubilizing agent, wherein the thickening agent is carboxymethylcellulose or a salt thereof, and the solubilizing agent is tyloxapol.

The invention discloses a high-temperature self-crosslinking modified water-based polyurethane resin and a preparation method thereof, which are prepared from the following components in parts by weight: polyisocyanate (50-80 parts), polyol (100-150 parts), A chain extender (10-20 parts), a second chain extender (3-5 parts), organic bismuth catalyst (0.05-0.1 parts), triethylamine (10-15 parts), water (300-500 parts) , amino curing agent (10-20 parts); its preparation method includes the following steps: Step 1: react polyol and polyisocyanate at 85-95 ° C for 2-3 hours; Step 2: add first chain extender and second chain extender react at 75~85℃ for 1~3h; step 3: add organic bismuth catalyst and react at 65~75℃ for 2~3h; step 4: cool down to 35~45℃, add amino curing agent, and add in triethylamine and; Step 5: adding water, the obtained product is reacted at 85-95° C. for 2-3 hours, and the acetone is removed in vacuum to obtain the water-based polyurethane resin.

The invention discloses a vertical monomolecular film field effect transistor based on a two-dimensional laminated heterostructure and a preparation method of the vertical monomolecular film field effect transistor, and belongs to the field of new materials and molecular field effect transistors. The vertical monomolecular film field effect transistor is composed of the two-dimensional material template layer, the ultra-flat metal electrode, a two-dimensional material insulating support layer, a self-assembled monomolecular film, a two-dimensional material drain terminal electrode, an insulating two-dimensional material dielectric layer and a conductive two-dimensional material gate electrode layer. According to the invention, a novel two-dimensional material is adopted to replace the gridand dielectric layer materials in a traditional field effect transistor, a two-dimensional material insulating layer is introduced to accurately control the atomic-scale thickness of the electrode spacing, and the two-dimensional material thin layer is introduced to improve the flatness of the metal electrode, so that the device achieves the atomic-scale flatness and controllable atomic layer thickness; the vertical molecular field effect transistor which has room temperature stability, is regulated and controlled by the solid-state grid and is provided with the ultra-flat metal electrode isrealized, and the stability of the device and the possibility of large-scale integration are greatly improved.

The invention relates to a building exterior wall insulation and expansion polystyrene board. A polystyrene foam board is formed in a way that expandable polystyrene (EPS) particles are employed as raw materials, and are heated and are subjected to a prefoaming treatment, and then are heated and molded in a die, and the polystyrene foam boards comprise ordinary foam boards and flame-retardant foam boards. The foam boards can be divided into building roofing insulation foam boards, wall insulation foam boards, floor heating foam boards and package damping foam boards by purpose. The building exterior wall insulation and expansion polystyrene board comprises a base wall body (1), the upper surface of the base wall body is attached to the surface of a mortar leveling layer (2), the mortar leveling layer is attached to a heat-insulation layer, the heat-insulation layer is connected with an anti-crack protective layer, the anti-crack protective layer is connected with a facing layer through an adhesive layer, and the overall thickness of the heat-insulation layer, the anti-crack protective layer and the facing layer is 50 mm. The building exterior wall insulation and expansion polystyrene board is applied to building exterior wall insulation systems.

The invention discloses an energy-saving insulation material, characterized by comprising, by weight, 18-28 parts of calcium silicate, 5-10 parts of diatomite, 8-14 parts of quartz sand, 2-5 parts of polyvinyl butyral, 10-16 parts of pure acetate, 20-30 parts of porous expanded perlite, 3-5 parts of aluminum silica powder, 8-14 parts of magnesium sulfate, 6-13 parts of n-butyl methacrylate, 2-5 parts of acrylic emulsion, 4-10 parts of silicone-acrylic emulsion, 5-14 parts of stearic acid, 2-5 parts of aminopropyltriethoxysilane, 1-5 parts of acetone-formaldehyde polycondensate, 1-3 parts of acrylamido-methylpropane sulfonic acid copolymer, 3-8 parts of lauryl dimethyl amine oxide, 5-12 parts of modified lightweight calcium carbonate, and 8-20 parts of deionized water. The energy-saving insulation material has good thermal insulation, is fireproof, waterproof and corrosion resistant, is used for building exterior wall insulation, is capable of effectively protecting a main structure with the influence of 'heat bridge' substantially eliminated, helps stabilize indoor temperature to ensure that summer is not hot and winter is not cold, and can save energy and protect environment.

The invention discloses an energy-saving environment-friendly material which consists of the following components in parts by weight: 30-50 parts of coal ash, 20-25 parts of quick lime, 1-2 parts of silicate, 2-4 parts of calcium carbonate powder, 10-20 parts of epoxy resin, 10-15 parts of expanded perlite, 3-7 parts of aluminum hydroxide, 10-15 parts of a thickening agent, 1-5 parts of a water retention agent, 8-13 parts of kieselguhr and 1-2 parts of wood fibers. The energy-saving environment-friendly material is wide in application range, can be not only applied to heat preservation of outer walls of buildings, but also used as other heat-preservation slurry, is capable of effectively protecting main body structures, preventing fire, water and corrosion and alleviating dampness of wall bodies, is beneficial to room temperature stability, is capable of keeping cool in summer and warm in winter, and is energy-saving and environment-friendly.

The invention provides a kit for detecting catecholamine and intermediate metabolites thereof in human urine, and the kit comprises the following reagents: (1) a calibrator solution, which is divided into calibrators of six concentrations, the calibrator of each concentration contains six catecholamines and metabolites thereof: epinephrine, noradrenaline, dopamine, methoxyepinephrine, methoxynoradrenaline and 3-methoxytyramine, and the concentration range of the calibrator is 1ng / mL to 3000ng / mL; (2) quality control products, which include a quality control product QCL, a quality control product QCM and a quality control product QCH; (3) an internal standard solution, namely a methanol solution mixed solution containing six catecholamines and metabolites thereof; (4) a buffer solution I; (5) a buffer solution II; and (6) a derivative solution. The sample is treated through derivatization reaction, the problem that catecholamine and intermediate metabolites thereof in the sample are easy to degrade is solved, and the sample is stable in room temperature state after derivatization.