6results about How to "Preparation Process Green" patented technology

The invention discloses an atomized liquid dressing composition for repairing cell microvesicles and a preparation method of the atomized liquid dressing composition. Comprising the following raw materials: 1.0%-8.0% of a sugar source, 0.01%-10.0% of algal polysaccharides, 0.01%-5.0% of sodium alginate, 0.01%-2% of sodium bicarbonate, 0.001%-0.08% of hydroxyethyl cellulose, 0.1%-2% of hyaluronic acid, 0.5%-2% of carboxymethyl chitosan, 0.1%-0.9% of sodium chloride, 0.03%-0.6% of a humectant, 0.05%-0.5% of an osmotic pressure regulator and the balance of distilled water or purified water. By means of sodium alginate, hydroxyethyl cellulose and the sugar source, the space structure of mucus can be changed, the mucoprotein concentration, cohesiveness and elasticity can be reduced, the pH value is adjusted in combination with sodium bicarbonate, decomposition and mutation of the sugar source are avoided, and then the storage stability of the atomized liquid dressing is improved.

The application provides an amphiphilic carbon dot, a rapid dispersion ultra-stable foam system and a preparation method thereof, and belongs to the field of oil field chemistry, wherein the preparation method of the amphiphilic carbon dot comprises the following steps: dissolving cholic acid in a first solvent to obtain a hydrophobic phase precursor solution; dissolving chitosan oligomer in a second solvent to obtain a hydrophilic phase precursor solution; mixing the hydrophobic phase precursor solution and the hydrophilic phase precursor solution in a closed reactor, standing for 5-10 min, and performing phased microwave treatment: 180-220 W for 1-3 min, 450-550 W for 2-5 min, and 80-120 W for 4-8 min; cooling the reaction liquid to room temperature, and obtaining the amphiphilic carbon dot through filtration, dialysis and freeze-drying. Through the synergistic effect of the amphiphilic carbon dot and the surfactant, the application can realize rapid dispersion to form uniform foam, and can maintain the stability of the foam in a high-salt environment for a long time, thereby meeting the application requirements in a high-salt scene.

The invention belongs to the technical field of high polymer material synthesis and preparation, and particularly relates to a preparation method of MS (Murashige and Skoog) resin, which comprises the following steps: by taking styrene and acrylate monomers as raw materials, under the combined action of an antioxidant, an initiator and a chain transfer agent, optimizing the technical process and adjusting the technical parameters, thereby obtaining the MS resin. Three-stage key process steps of internal circulation prepolymerization, polymerization in a second-stage reactor and grafting in a static mixer are set, and by accurately controlling the feeding proportion of reaction materials, catalytic materials and the like, and the reaction temperature, stirring speed, retention time, solid content proportion and the like of each process step, the high-efficiency and high-efficiency preparation of the catalyst is realized. The prepared MS resin product is pure, free of bubbles, low in product smell, good in transparency and low in haze, and has good market prospects and application and popularization values.

This invention discloses a method for preparing a TNTs / NiO@CoPi array electrode (TNCP) for photoelectrocatalytic water splitting, belonging to the field of photoelectrocatalytic new energy materials technology. The invention first prepares a highly ordered anatase TiO2 nanotube array (TNTs) using secondary anodic oxidation, then loads Ni nanoparticles onto the surface and inside the nanotubes via constant current electrodeposition, followed by high-temperature calcination to generate p-type NiO, constructing a TNTs / NiO p-n heterojunction (TN). Finally, it uses AM 1.5 simulated sunlight to selectively deposit an amorphous CoPi cocatalyst, where the CoPi only coats the NiO nanospheres without blocking the TiO2 mass transfer channels. This invention utilizes the p-n heterojunction to broaden the full-spectrum light absorption from 250 to 800 nm, and CoPi acts as a hole-trapping layer to suppress electron-hole recombination, significantly reducing interfacial charge transport impedance; the steady-state photocurrent of the TNCP deposition sample reaches 0.06 mA·cm⁻. 2 It is three times that of pure TNTs. This process involves no precious metals or highly toxic corrosive solvents, and the reaction conditions are mild. The electrodes produced can be used for photoelectric water splitting to produce hydrogen, photoelectric oxidation of organic pollutants, and ethylene glycol photoelectric fuel cells. They exhibit excellent cycle stability and have promising prospects for large-scale industrial applications.

The invention discloses a mutant enzyme, a fermentation production method thereof and an application of the mutant enzyme in preparation of fagopyrine, an amino acid sequence of an aminopropanol oxidase mutant enzyme is shown as SEQ.ID.NO.1, an amino acid sequence of a phosphofructose aldolase mutant enzyme is shown as SEQ.ID.NO.3, an amino acid sequence of a benzyl hydrolase mutant enzyme is shown as SEQ.ID.NO.5, and the fermentation production method of the mutant enzyme and the application of the mutant enzyme in preparation of fagopyrine. And the amino acid sequence of the fagopyrine reductase mutant enzyme is as shown in SEQ.ID.NO.7. On the basis of a natural enzyme, site-directed mutagenesis test is carried out to improve the substrate catalytic activity of the natural enzyme; meanwhile, a to-be-replaced remote site is positioned by utilizing an error-prone PCR high-throughput screening experiment, so that the experiment is guided to improve the activity and the stability of the enzyme. Finally, the mutant enzyme SkADH / EcFSA / AlUR / SspIRED of which the performance in each aspect is improved is successfully obtained by integrating the above aspects.

The invention provides an antibacterial packaging material as well as a preparation method and application thereof, specifically, phenolic substances are successfully cross-linked to a main component unit, namely eucalyptus mechanical pulp, of a seafood packaging material by virtue of the action of biological enzyme, so that the cross-linked eucalyptus mechanical pulp obtains unexpected antibacterial and antioxidant properties, and the antibacterial packaging material has the advantages of being simple in preparation process, low in cost and good in application prospect. Furthermore, paper or a packaging material prepared from the eucalyptus mechanical pulp has the functional characteristics of being capable of degrading nitrite, resisting vibrio and resisting oxidation, and has certain practical values on preservation, quality improvement, inhibition of growth of harmful microorganisms and oxidation resistance when being used as a packaging material of marine products; the invention belongs to a completely innovative scheme in the field of seafood packaging materials.