17results about How to "Non-toxic" patented technology

The present application relates to green flower vegetable fresh-keeping paper and preparation method and application, including paper-like carrier, and further including powder-like Pickering emulsion freeze-dried sprayed on the carrier, components of the Pickering emulsion freeze-dried include 1-MCP, mustard essential oil, emulsifier and stabilizer.The green flower vegetable fresh-keeping paper has the effects of antibacterial, green protection, insecticidal and antioxidant on green flower vegetable, can realize long-acting fresh-keeping of green flower vegetable during storage, is suitable for large-scale popularization and application, is convenient for packaging and storage of large quantities of postharvest green flower vegetable, and raw materials are widely sourced, low in price, suitable for large-scale production and use, and the related raw materials are non-toxic and harmless to human body and environment, safe and reliable.

This invention discloses a method for preparing a thermally conductive and insulating coating, comprising the following steps: taking a base resin, adding an active diluent, reducing the viscosity of the base resin and mixing it evenly under heating and stirring conditions, and then stopping the heating; sequentially adding modified hexagonal boron nitride nanosheets and nano-Al 2 O 3 The thermally conductive and insulating coating is prepared by dispersing coupling agent, leveling agent, initiator, stabilizer, curing agent, and defoamer for several hours. The modified hexagonal boron nitride nanosheets are hexagonal boron nitride nanosheets modified with amino acids. The thermally conductive and insulating coating prepared by the method provided by this invention has good thermal conductivity and good insulation properties on circuit boards, exceeding 25kV / mm. The entire production process is pollution-free, non-toxic, and more environmentally friendly, and the entire process is relatively simple.

The application provides a heterocyclic quaternary acid and a preparation method and application thereof. The heterocyclic quaternary acid has a structure shown in formula I, wherein Y is selected from a substituted or unsubstituted heterocyclic group, R1 and R2 are independently selected from a linear or branched alkyl group with 1-6 carbon atoms or a substituted or unsubstituted aromatic ring. 10 The heterocyclic quaternary acid has the advantages of good biological compatibility and low toxicity due to the presence of an amide bond, and is suitable for synthesizing a low-toxicity plasticizer.

The application belongs to the field of pharmaceutical chemical industry, and particularly relates to a liquid-phase preparation method of a side chain of somatuline. The preparation method of the application is that Fmoc-His(Trt)-OH reacts with H-Aib-OtBu under the action of a condensing agent T3P to obtain Fmoc-His-Aib-OH. The preparation method provided by the application simplifies operation steps, can control monomer impurities below 0.05%, can control inferior isomer impurities below 0.01%, is short in a synthesis period, is low in cost, has few by-products, and is suitable for industrial production.

The invention belongs to the field of preparation of inorganic flame-retardant materials, and particularly relates to a preparation method and application of nitrogen-phosphorus-silicon co-doped flame-retardant fluorescent carbon quantum dots. The nitrogen-silicon co-doped carbon quantum dots are prepared by adding a carbon source compound, a nitrogen source compound and a silanization reagent in the hydrothermal synthesis process, meanwhile, the surfaces of the carbon quantum dots contain rich amino groups, one hydrogen atom in the amino groups is substituted by a phosphorus source compound spiro phosphate diacyl chloride, and the nitrogen-silicon co-doped carbon quantum dots are obtained. According to the nitrogen-phosphorus-silicon co-doped carbon quantum dot, nitrogen, phosphorus and silicon elements can improve the fluorescence yield and the flame retardant property of the carbon quantum dot. Moreover, the nitrogen-phosphorus-silicon co-doped flame-retardant fluorescent carbon quantum dot prepared by the method has a spiral ring structure on the surface, is sprayed on the surface of a fabric in a post-finishing form, is subjected to ring-opening crosslinking under the action of a photoinitiator and UV light, and can be effectively combined with a fiber base material, so that the problem of falling in the subsequent washing and using processes is solved.

The invention provides a gallium-based propane dehydrogenation catalyst as well as a preparation method and application thereof, and relates to the field of petrochemical engineering catalysis. The catalyst comprises the following components in percentage by mass: 3-20% of gallium element, 1-10% of additive element and the balance of carrier element, wherein the carrier is zinc aluminate. The preparation method comprises the following steps: S1, preparing a zinc aluminate carrier, putting the zinc aluminate carrier in a negative pressure environment, and standing for 30-60 minutes; s2, uniformly mixing the gallium-containing solution and the assistant-containing solution to obtain an impregnation liquid; and S3, sucking the impregnation liquid into the surface of the zinc aluminate carrier under negative pressure, aging and drying, and roasting in a muffle furnace. The catalyst has relatively high propane dehydrogenation reaction performance and long-time stability, and has relatively high propylene selectivity and good stability when being applied to a propane dehydrogenation reaction process.

This invention belongs to the field of probiotic screening and application technology, specifically relating to a strain of *Lactobacillus paracasei* and its application in the prevention and treatment of colonic polyps and colon cancer. The *Lactobacillus paracasei*, named *Lactobacillus paracasei* V85, was deposited on January 15, 2026, at the China Center for Type Culture Collection (CCTCC), Wuhan University, China, with accession number CCTCC NO: M2026124. The *Lactobacillus paracasei* V85 provided by this invention is sensitive to common antibiotics and has good biosafety; it possesses strong antioxidant function and a strong inhibitory effect on hemolytic streptococci; it can produce a strong agglutination effect with hemolytic streptococci, which is beneficial for inhibiting the colonization of hemolytic streptococci in the intestine, reducing the risk of colonic polyps and colon cancer caused by hemolytic streptococci, and can promote the proliferation of *Akkermansia myxophilus*. It can be used to prevent and treat colonic polyps and colon cancer caused by hemolytic streptococci, and has broad application prospects.

The present invention relates to a biological polysaccharide hydrogel, a preparation method therefor and an application thereof. The biological polysaccharide hydrogel of the present invention is formed by means of the mixing and reaction of two solutions; the first solution is a polysaccharide derivative solution having an aldehyde on a side chain; the second solution is a polysaccharide derivative solution having a primary amine on a main chain or a side chain, or a small molecule compound solution having two or more primary amines. The preparation method of the present invention comprises preparing the first solution and the second solution, and then mixing the first solution and the second solution to form a transparent biological polysaccharide hydrogel. The biological polysaccharide hydrogel of the present invention can be applied as a vitreous substitute.

The invention provides a preparation method and application of a citric acid modified Cd-MOF material, and belongs to the technical field of metal organic framework materials. The citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) is synthesized by adopting a chemical grafting and steam diffusion method, and the adsorption performance and the reusability of the citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) are systematically researched. Parameters such as concentration, dosage, pH and the like of citric acid are associated, the adsorption effect of the citric acid on heavy elements in a portable solution is investigated, and the adsorption capacities of the citric acid on anionic dye Congo red (CR) and heavy metal ions (Cu < 2 + >) are as high as 900.9 and 287.4 mg.g <-1 > respectively. The citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) obtained by the invention has the characteristics of being simple, green, environment-friendly and reusable, has excellent adsorption performance, and can be used for simultaneously removing organic dye and heavy metal ion pollution in water.

The invention discloses a method for improving seed germination under a salt stress condition and application thereof, and belongs to the technical field of crop production. According to the method provided by the invention, the germination ability of the seeds under the salt stress condition can be remarkably improved, the germination rate, germination potential and germination index of the watermelon seeds and the muskmelon seeds under the salt stress condition simulated by 250mM NaCl can be remarkably improved by soaking the seeds with 10 mu M methyl caffeate, and the germination of the watermelon seeds and the muskmelon seeds under the normal condition is not influenced; seedlings generated by the seeds treated by the method provided by the invention grow robustly, and compared with seedlings grown under normal conditions, obvious abnormity is not observed, so that the method provided by the invention is safe and has no toxic effect on plant growth; the provided method is simple, effective and low in cost, and can be used for improving the seed germination capacity under the salt stress condition so as to improve the utilization capacity of the saline-alkali soil and improve the crop yield and quality contribution of the saline-alkali soil.

The application discloses a kind of based on underwater structure settlement nondestructive intelligent monitoring optical fiber layout method, comprising the following steps: optical fiber layout is carried out on dry canal bottom surface and slope surface;Adopt negative pressure suction disc assembly and fix optical fiber on canal bottom concrete slab;When disassembling, pressurized grouting is added through communicating pipe, and biological-based adhesive strip is expanded, the negative pressure adsorption state is destroyed, and the negative pressure suction disc assembly is removed.The application can obtain canal bottom settlement data in real time before, during and in the operation period of crossing engineering construction by laying optical fiber on dry canal bottom surface and slope surface and fixing optical fiber on concrete slab by negative pressure suction disc assembly, provides direct basis for judging the influence of crossing engineering on dry canal deformation, and does not need to punch or anchor in concrete bottom plate, completely avoids damage to canal bottom structure, and will not cause any pollution to dry canal water, meets the high protection level requirement of South-to-North Water Diversion Project.

The application discloses a kind of preparation auricularia auricular polysaccharide / casein emulsion gel and its preparation method and application.The preparation method of the application includes the following steps: 1) auricularia auricular polysaccharide aqueous solution is mixed with casein aqueous solution, to obtain protein-polysaccharide complex solution;2) water phase is mixed into oil phase, the water phase is the protein-polysaccharide complex solution, and the obtained mixture is ultrasonically homogenized, to obtain emulsion;3) gluconic acid-delta-lactone is added to the emulsion and mixed, incubated, to obtain auricularia auricular polysaccharide / casein emulsion gel.The auricularia auricular polysaccharide / casein emulsion gel disclosed in the application is applied to curcumin encapsulation.After adding auricularia auricular polysaccharide, the gel performance of casein emulsion gel is significantly improved;After adding auricularia auricular polysaccharide, the loading rate of curcumin loaded in casein emulsion gel is significantly increased.

This invention discloses an antimicrobial 10-peptide, characterized by the sequence: w-k-r-w-r-r-w-w-r-r(dTrp-dLys-dArg-dTrp-dArg-dArg-dTrp-dTrp-dArg-dArg), where all amino acids are D-type amino acids. The antimicrobial peptide provided by this invention exhibits good antimicrobial activity against a variety of pathogenic bacteria. This antimicrobial peptide can be synthesized using the Fmoc solid-phase chemical method, which is easy to synthesize and exhibits good in vivo antimicrobial activity. This antimicrobial peptide exhibits broad-spectrum killing activity against multidrug-resistant Acinetobacter baumannii, carbapenem-resistant Pseudomonas aeruginosa, as well as standard strains of Acinetobacter baumannii, Pseudomonas aeruginosa, Klebsiella pneumoniae, Escherichia coli, Enterobacter cloacae, methicillin-resistant Staphylococcus aureus, and Staphylococcus aureus. It has low hemolytic toxicity, and at low to medium concentrations (2 μg / mL to 32 μg / mL), the cell survival rate can reach more than 50%. It has no toxic effect on cells, good stability, strong operability, and low cost.

The application discloses a kind of fluorine-containing amphiphilic block polymers, its preparation method and application, a kind of fluorine-containing amphiphilic block polymer structure is: Wherein, R1It is hydrophilic group, R2It is fluorine-containing hydrophobic group, n, m are polymerization degree.The fluorine-containing amphiphilic block polymer of the application is synthesized by controllable polymerization method from hydrophilic material polyethylene glycol and hydrophobic material fluorine-containing acrylate, can freely change the proportion of hydrophilic material and hydrophobic material, maximum limit load hydrophobic material perfluoro crown ether;The fluorine-containing amphiphilic block polymer of the application synthesis process is simple, can be self-assembled into spherical particles in aqueous solution, can stably exist in blood, reach tumor area by infrared light illumination to produce reactive oxygen, under the condition of not being illuminated, cell has no toxic effect.

This invention belongs to the field of photo-evaporation desalination of water, specifically relating to a composite photoevaporator for photo-evaporation desalination and its preparation method. Carbon nanotubes, which possess excellent light absorption and water transport capabilities, are dispersed in biomass materials. Simultaneously, a layer of copper acetate is sprayed onto the surface of the biomass materials containing carbon nanotubes, forming copper particles after carbonization. The photoevaporator prepared by this invention combines metal, carbon nanotubes, and biomass materials, exhibiting contrasting hydrophilic and hydrophobic properties and strong salt resistance.

The utility model discloses a thin film for food, which relates to the field of thin films, and has the technical scheme that the thin film comprises a plurality of sections, adjacent sections are divided by tooth lines, any section is provided with a round sheet, the round sheet and the sections are divided by the tooth lines, a plurality of extension sections are integrally formed at the edge of the round sheet, and the extension sections and the sections are divided by the tooth lines. The contact area of the film and a food container is increased through the extension sections, so that the connection strength of the film and the container is improved, the sealing effect of the film is guaranteed, the polypropylene film has the advantages of being light in weight, non-toxic, odorless, moisture-proof and the like, the drawing force borne by the wafer is more uniform through the two extension sections, wrinkles are further reduced, and the service life of the film is prolonged. Meanwhile, the material utilization rate is ensured.

The invention relates to a polymer modified material, a preparation method and application thereof, the polymer modified material comprises the following raw materials: loess particles, epoxy resin and a curing agent, the mass ratio of the epoxy resin to the curing agent is (10-11): (4-5); the mass ratio of the loess particles to the sum of the epoxy resin and the curing agent is (97-98): (2-3); the preparation method comprises the following steps: sieving loess with a 12-16-mesh sieve to obtain loess particles with the particle size of less than 2mm; the preparation method comprises the following steps: uniformly mixing epoxy resin and a curing agent according to a mass ratio of (10-11): (4-5) to obtain a mixture A; adding the mixture A into the loess particles until the mixture A is uniformly distributed in the loess particles, and naturally air-drying the obtained mixture B at normal temperature for 2-7 days to completely cure the epoxy resin on the surfaces of the loess particles, thereby finally obtaining the polymer modified material. According to the invention, a layer of polymer film is attached to the surface of loess particles to protect the particles from collapsing when encountering water, and meanwhile, the modified material has better pollutant adsorption capacity.