10 results about "Eosin Y" patented technology

The invention discloses a process for synthesizing methylated flavonoids derivatives by utilizing a photocatalysis technology, which comprises the following steps: firstly, placing flavonoids derivatives in a glass test tube, then adding dimethyl sulfoxide (DMSO) as a methyl donor and a solvent, and adopting eosin Y as a photocatalyst to synthesize the methylated flavonoids derivatives. And 1-azabicyclo [2.2. 2] octane (quinuclidine) is added as an alkaline additive. Under the condition of room temperature, a blue light source with the power being 18 watts and the wavelength being 455 nanometers is used for carrying out illumination stirring reaction. And separating and purifying the crude product to obtain the 3-methyl flavonoid derivative. The invention realizes a photochemical C-H alkylation reaction of dimethyl sulfoxide and flavonoid derivatives, a series of functionalized methylated flavonoid derivatives can be constructed through simple operation, and compared with the traditional synthesis method, the method has the main advantages that: 1) the reaction condition is mild, and the reaction can be smoothly carried out at room temperature; the method has the advantages of simple operation, no need of metal catalysts and strong oxidants, no need of strong acids, simple operation, no need of nitrogen protection, high yield and good tolerance of functional groups.

The method for self-sensitization detection of 2-chlorophenol based on eosin Y-carbon nitride system relates to the application technology field of eosin Y-carbon nitride system in visual detection of 2-chlorophenol. The purpose of the present application is to solve the problems of how to improve the selective adsorption capacity of g-C3N4 to trace concentration 2-chlorophenol and realize visual super-sensitive detection of colorless 2-chlorophenol. Method: tetra bromo fluorescein disodium aqueous solution, silver modified carbon nitride nanosheet suspension and 2-chlorophenol aqueous solution are mixed, and the pH is adjusted to 3-9; the mixed solution is placed in a photocatalytic reactor, stirred and adsorbed for 1-30 min in the dark, 525 nm visible light is turned on, and after light irradiation, the filtrate is detected by ultraviolet visible spectrophotometer, and the visual detection of 2-chlorophenol in water based on single-atom silver modified carbon nitride nanosheet is completed. The method for self-sensitization detection of 2-chlorophenol based on eosin Y-carbon nitride system can be obtained.

This invention relates to the field of medical testing, and particularly to a Wright-Gymsza staining solution and its application. The Wright-Gymsza staining solution of this invention comprises staining solution A and staining solution B. Staining solution A mainly consists of eosin Y, azurite-eosin A, methylene blue, cell fixative, and stabilizer, while staining solution B is a buffer solution. Experiments have shown that the Wright-Gymsza staining solution of this invention can stain normally for 27 months after preparation, solving the technical problems of uneven staining and dye residue on the staining platform after a period of time after opening.

This invention discloses a method for preparing a Zr-MOF catalyst containing a Co single-atom site, belonging to the field of metal-organic framework synthesis and advanced oxidation catalysis technology. First, mesoporous Zr-MOFs (NKM-508) are prepared via a solvothermal method using H4TCPB-CH3 ligand and ZrCl4. Based on NKM-508, N,O coordination sites are constructed through aspartic acid amino modification and salicylaldehyde Schiff base reaction, ultimately anchoring a Co single atom to obtain the NKM-508-Co catalyst. This catalyst exhibits good stability, can efficiently activate potassium persulfate (PMS) to generate reactive oxygen species, can rapidly degrade various azo dyes such as eosin Y, orange G, methylene blue, and rhodamine B, and demonstrates excellent recyclability.

The application discloses a preparation method of a ratio type fluorescent probe and application of the ratio type fluorescent probe in detection of bromohexadecylpyridine, and first, sulfur quantum dots SQDS@beta-CD are prepared by taking thiourea as a sulfur source, beta-cyclodextrin as a protective agent and hydrogen peroxide as an oxidant; then, the ratio type fluorescent probe EY-SQDS@beta-CD is prepared by taking the sulfur quantum dots and eosin Y as design materials. The ratio type probe has two emission peaks at 412 nm and 548 nm, and bromohexadecylpyridine can reduce the emission peak fluorescence intensity at 548 nm, while the emission peak fluorescence intensity at 412 nm is basically unchanged. Meanwhile, the application constructs a new method for detecting bromohexadecylpyridine based on the ratio type fluorescent probe. The ratio type fluorescent probe developed by the application can effectively overcome the interference of instruments and environment and the like on the determination of bromohexadecylpyridine, and further improve the reliability of the determination result.

This invention discloses a wet tissue surface adhesive material, its preparation method, and its application, relating to the field of biomedical materials technology. The wet tissue surface adhesive material comprises: (1) dopamine-modified methacryloyl hyaluronic acid (HAMA-DOPA); (2) Pluronic F127-diacrylate (F127DA); (3) aldehyde-modified polyether F127 (F127CHO); (4) oxidized methacryloyl hyaluronic acid (OHAMA); and (5) a photoinitiator for initiating a photopolymerization reaction of the methacryloyl groups and acrylate groups in the above components under visible light irradiation. The photoinitiator comprises at least one of: lithium phenyl (2,4,6-trimethylbenzoyl) phosphate or a photoinitiator composition, wherein the photoinitiator composition comprises: eosin Y at a concentration of 0.05 to 0.25 mmol / L; triethanolamine at a mass-volume ratio of 1.5% to 3%; and N-vinylcaprolactam at a mass-volume ratio of 1% to 2%. This invention enables rapid, strong, and safe tissue adhesion.

The invention discloses a photocuring biological tissue adhesive as well as a preparation method and application thereof, and relates to the technical field of biomedical materials. The photocuring biological tissue adhesive comprises: (1) a photocuring cross-linked network forming unit, which comprises: (1) a methylacryloylated natural polymer with amino on the main chain; (2) F127DA; (2) a dynamic and stable chemical crosslinking unit comprising: (1) an oxidized polysaccharide comprising at least one of oxidized dextran, oxidized hyaluronic acid, and oxidized cellulose; (2) succinimide acrylate; (3) a photoinitiator comprising: a lithium phenyl (2, 4, 6-trimethylbenzoyl) phosphate salt or a photoinitiator composition, the photoinitiator composition comprising: eosin Y at a concentration of 0.05 to 0.25 mmol / L; triethanolamine, the mass volume ratio of which is 1.5% to 3%; and N-vinylcaprolactam in a mass volume ratio of 1% to 2%. According to the invention, the visual pathway is not obstructed while firm bonding is realized, and the application prospect of the high-precision advanced field is expanded.

The application belongs to the technical field of supramolecular artificial light harvesting system luminescent material, and discloses a phosphate pillar arene water phase artificial light harvesting system, a preparation method and application. The application uses phosphate modified pillar [5] arene compound WPP5 as a host molecule, uses a phenylcarbazolyl modified acrylonitrile derivative compound TPA as a guest molecule and an energy donor, uses a fluorescent dye eosin Y as an energy acceptor, and constructs an efficient water phase artificial light harvesting system in water through host-guest interaction. The light harvesting system prepared by the application can still maintain excellent energy transfer efficiency and antenna effect under a high donor-acceptor ratio, is simple to prepare, low in cost, environmentally friendly, stable in structure, long in storage time, and has potential application value in the field of artificial light harvesting.

EY (Eosin Y) is used as a stabilizer, and EY / Ag2S composite nanoparticles are synthesized through the strong combination effect of silver ions and sulfur ions. When the concentration of EY is 5.0 * 10 <-6 > M and the ratio of EY to Ag < + > to S < 2-> is 1: 20: 10, the synthesized EY / Ag2S composite nanoparticles have very weak fluorescence intensity at 547 nm under the excitation of 290 nm light. When glutathione (GSH) is added, the fluorescence intensity of an EY / Ag2S system at 547 nm can be enhanced, when the concentration is in a range of 0.1-2.0 [mu] M, a good linear relationship is formed between the increase value of the fluorescence of the system and the concentration of GSH, the correlation coefficient r is 0.9981, and the detection limit is 0.033 [mu] M. Therefore, a method for detecting GSH with high sensitivity is established.

A photocrosslinkable bioink composition for three-dimensional printing is provided. The photocrosslinkable bioink composition includes: an aqueous solution of a recombinant spider silk protein comprising the NT2RepCT-MaSp2 sequence; a polymer comprising pendant groups reactive under visible light-initiated radical polymerization; and a photoinitiator system configured to generate free radicals upon exposure to visible light. The polymer is selected from the group consisting of methacrylated gelatin, methacrylated hyaluronic acid, methacrylated chitosan, polyethylene glycol diacrylate, and combinations thereof. The photoinitiator system is selected from the group consisting of tris(bipyridine)ruthenium(II) chloride with ammonium persulfate, eosin Y with triethanolamine, riboflavin with ammonium persulfate, and lithium phenyl-2,4,6-trimethylbenzoylphosphinate. The photocrosslinkable bioink composition is curable under visible light to form a biocompatible hydrogel structure suitable for cell culture or implantation.