7results about How to "Long-term storage stability" patented technology

The invention discloses a preparation method of sandwich type immunomagnetic beads with high thermal stability, which comprises the following steps: by taking polystyrene microspheres as a template, introducing oil-phase Fe3O4 nanoparticles into the polystyrene microspheres through a swelling method, and then carrying out hydrolytic condensation reaction on the surface of a microsphere assembly by utilizing n-octyltrimethoxysilane OTMS to obtain the sandwich type immunomagnetic beads with high thermal stability. The preparation method comprises the following steps: carrying out surface amination modification on a silicon dioxide thin layer which is grown by hydrolysis of tetraethoxysilane TEOS to realize coating of an outermost organic shell layer, carrying out surface amination modification, and carrying out cross-linking on 1, 4-butanediol diglycidyl ether and erythritol on the surface to form an epoxy polymer layer so as to obtain the sandwich-type immunomagnetic bead with a cross-linked epoxy polymer layer introduced to the outer layer. According to the epoxy group modification process on the surface of the magnetic bead, a direct cross-linking modification process is adopted, so that the operation steps are simplified, and the obtained epoxy group magnetic bead is ensured to show excellent biocompatibility. In addition, the method omits the tedious process of functional group activation, and allows direct coupling with the antibody, thereby greatly improving the efficiency and convenience of the experiment.

The invention provides a hair and bath cleaning product, which is prepared from the following ingredients in parts by weight: 0.3 to 1.0 part of cationic surface active agents, 9.0 to 15.3 parts of ampholytic surface active agents and 0.6 to 3.6 parts of anionic surface active agents. The hair and bath cleaning product can effectively control the generation of flocculation in the dilution process, the product keeps clear and stable when diluted by 10-10.4 times, flocculation starts to occur when the dilution ratio is greater than or equal to 10.5, and the hair and bath cleaning product is particularly suitable for being directly used after being diluted. The product has the effects of washing hair and bathing, is not added with antibacterial components, also has a good antibacterial effect, and can avoid the breeding of bacteria in the use process of the diluent.

A method for producing a dental filling material that includes polyvalent metallic element-including inorganic particles includes a step of treating the inorganic particles with a solution including a chelating agent.

The invention belongs to the technical field of solar cells, and relates to a preparation method, a product and application of a strong-polarity tin oxide nano material. A Meerwein reagent is used for carrying out ligand modification on an organic amine and organic acid modified SnO2 nano material to obtain a nano material modified by one or more ligands of tetrafluoroborate BF4 <->, Me3O <-> and Et3O <->, so that the nano material can be dispersed in a strong-polarity organic solvent and then is spin-coated or blade-coated on an ITO / FTO (indium tin oxide / fluorine-doped tin oxide) substrate or a perovskite layer; the obtained tin oxide film has relatively good conductivity and leveling property, excellent film-forming property and relatively good spreadability; meanwhile, the tin oxide organic strong-polarity dispersion liquid has long-term stability in the aspect of storage stability; and the material has excellent light conversion efficiency in the aspect of device performance.

This application relates to a nanodiamond radiation heat dissipation coating composition, its preparation method, and the product thereof. It belongs to the field of heat dissipation materials technology. The composition of this application uses silanization modification to solve the problem of nanodiamond agglomeration, resulting in uniform nanodiamond dispersion and long-term storage stability. It uses an organic-inorganic dual resin of silicon-modified polyurethane / inorganic siloxane protease, which balances adhesion, hardness, and temperature resistance, with a temperature resistance ≥600℃. The magma extract dispersant has three functions: dispersion, enhanced infrared radiation, and weather resistance. During spraying, surface drying at room temperature ≤5 minutes, complete curing ≤24 hours, insulation withstand voltage ≥4000V, and UV aging simulated life >10 years.

This invention belongs to the field of cosmetic technology and discloses a soothing and anti-hair loss hair growth liquid and its preparation method. The hair growth liquid is composed of a compound anti-hair loss active ingredient, a scalp soothing and repairing agent, a penetration enhancer, an alcohol solvent, a surfactant, a pH adjuster, a preservative, and water. The compound anti-hair loss active ingredient is obtained by gradient ethanol extraction and concentration of five raw materials, including Platycladus orientalis leaves and Drynaria fortunei, in a specific ratio. The scalp soothing and repairing agent is obtained by decoction and concentration of raw materials such as Salvia miltiorrhiza and Aralia elata root. During preparation, the final product is obtained through stepwise extraction, density control, specific sequential compounding, and low-temperature maturation processes. This invention, through the synergy of raw materials and processes, enables the product to have good effects in preventing hair loss, promoting hair growth, and soothing the scalp, and also exhibits good stability.

The invention provides a creatine kinase isoenzyme freeze-dried product as well as a preparation method and application thereof. The creatine kinase isoenzyme freeze-dried product is prepared from the following raw materials: a creatine kinase isoenzyme antigen, polygonatum polysaccharide and a chelating agent; the chelating agent comprises any one of citric acid, iminodiacetic acid and 1-hydroxyethylidene-1, 1-diphosphonic acid. The components such as the polygonatum polysaccharide and the chelating agent are adopted, so that double protection of oxidation resistance and dimer stability is realized, and the creatine kinase isoenzyme is good in activity after freeze-drying, stable in long-term storage and good in detection accuracy and repeatability.