34results about How to "Photostable" patented technology

The invention discloses a micron-grade arachidonic acid emulsion liquid and a preparation method thereof. The emulsion liquid 1000g in total weight comprises 50g-150g of arachidonic acid, 10g-70g of oil-phase emulsifier, 0.1g-20g of antioxidant, 5g-40g of water-phase emulsifier, 60g-300g of thickened stabilizer, 10g-200g of dispersant and others of water. The emulsion liquid of the invention is O / W type, and the emulsion liquid with stable state and emulsified grain size of less than 1 micron is obtained mainly by the emulsifier and the thickened stabilizer of certain percentage go through the emulsification process with ARA oil and water. The task of the invention is to provide a formula for preparing an ARA emulsion liquid that can be dispersed in cold water and has good stability, and is stable against light, heat and oxygen, and the formula can be conveniently applied in the relevant industries of the drink industry, etc.

The invention belongs to the field of protein construction, particularly relates to a bright blue fluorescent protein, a construction method thereof and an application thereof in preparation of a protein sun-screening agent, and further relates to the sun-screening agent containing the bright blue fluorescent protein. The invention relates to the bright blue fluorescent protein, which is a protein(a) or (b) as follows: (a) a protein composed of an amino acid sequence shown in SEQ ID: NO.2; and (b) a protein which is derived from (a) by substituting, deleting or adding one or more amino acidsto the amino acid sequence of (a) and has an exquisite blue fluorescent protein activity. The bright blue fluorescent protein has the characteristics of pH insensitivity, light stability and the like;the chromophores can absorb long-wavelength ultraviolet (UVA) and release fluorescence with the wavelength of more than 400 nm; meanwhile, the content of aromatic amino acid is high (9.2%), medium-wavelength ultraviolet (UVB) can be absorbed, UVA can be released, UVA can be further absorbed by chromophores through energy resonance transfer, and therefore UFP has the possibility of being developedinto protein sun-screening agents.

The invention discloses durable highway guardrail paint. The durable highway guardrail paint is prepared from the following raw materials in parts by weight: 6-11 parts of a thickening agent, 3-6 parts of a light stabilizer, 4-8 parts of a dispersing agent, 5-7 parts of a mildew-proof anti-algae agent, 6-11 parts of dipropylene glycol, 3-8 parts of phthalic anhydride, 6-14 parts of organosilicone acrylate, 4-8 parts of hydrogenated castor oil, 6-10 parts of di-tert-butyl peroxy-phthalate, 1-3 parts of a defoaming agent, 4-9 parts of polyvinyl alcohol methyl ester, 5-7 parts of 2-chloroethanesulfonic acid, 1-5 parts of methyl alcohol, 2-6 parts of purified bentonite and 5-10 parts of hydrated alumina. The durable highway guardrail paint has the beneficial effects of high acid and alkali resistance, high corrosion resistance, light stability and small possibility of light deterioration.

The invention discloses a steganographic material and a steganographic method based on surface-enhanced Raman nanoparticles, and relates to the fields of materials and information security. The steganography material based on surface-enhanced Raman nanoparticles of the present invention is a mixed material in which surface-enhanced Raman nanoparticles are added to common materials. Surface-enhanced Raman nanoparticles are composed of metal nano-substrate and characteristic Raman molecules, and the metal nano-substrate is gold. In the steganographic method of the present invention, one or more steganographic materials and ordinary materials are used to respectively record information and perform encryption. Use Raman spectrometer to scan or image to read the Raman spectrum information of the steganographic material and the common material, use the algorithm to extract and optimize the coefficients of different components to obtain the best fitting spectrum, complete background noise elimination and different Combination and selection of steganographic materials to obtain hidden information and complete decryption. The invention has the characteristics of safety, low cost, strong signal, good light stability and environmental stability, and can carry out multiple information combination.

The invention relates to a preparation method of a titanium-containing composition with light stability, which mainly solves the problem of poor light stability of reaction products of titanate and 2-hydroxycarboxylic acid compounds in the prior art. The present invention preferably solves this problem by first reacting titanate with 2-hydroxycarboxylic acid compounds, and then reacting the reaction product with an organic phosphonic acid compound to obtain a titanium-containing composition, which can be used in the production of polyester catalysts. in industrial production.

The invention relates to a resveratrol composite film agent. The film agent takes L-polylactic acid and lignin-grafted D-polylactic acid copolymer as a main film forming material; by utilizing a solution blending method and simultaneously introducing resveratrol, the composite film agent with good mechanical property, thermal stability, UV resistance, biocompatibility and drug slow release is prepared in a compounding manner. On one hand, a stereocomplex formed by L-polylactic acid and D-polylactic acid molecular chains can significantly improve the compatibility of the polylactic acid with the lignin and improve the mechanical properties of the lactic acids; on the other hand, the lignin and resveratrol have a similar polyphenol structure and a certain ultraviolet resistance, so that thestability of the resveratrol can be improved, and the long-acting release is realized.

The invention discloses a high-strength geogrid. The high-strength geogrid is prepared from, by weight, 100 parts of matrix resin, 20-30 parts of thermoplastic elastomer, 20-40 parts of reinforcing filler, 5-10 parts of a light stabilizer, 1-5 parts of an antioxidant, 1-3 parts of phthalate plasticizer and 1-3 parts of a crosslinking agent. The high-strength geogrid is excellent in light radiation resistance, tensile strength retention rate is about 98% after 84h light irradiation, ageing of the geogrid is remarkably decelerated, and deformation and damage of the geogrid are reduced.

The invention discloses a cyclopentadiene-bridging dimeric perylene diimide compound and a preparation method thereof. The preparation method comprises the following specific steps: firstly, 1-nitro-3,4:9,10-perylentetracarboxylic diimide, cyclopentadiene and inorganic alkali salt are mixed and dissolved in a polar aprotic organic solvent and react for 0.5-3 hours to obtain a mixed solution; and then 2 mol / L diluted hydrochloric acid is added into the obtained mixed solution dropwise, a precipitate is precipitated and subjected to suction filtration, a coarse product is obtained after the precipitate is washed with water and subjected to silica-gel column chromatography to obtain a product, and the leaching liquid volume ratio of dichloromethane to ethyl acetate is 20: 1. The preparation method is simple in step, the product is obtained through one-step reaction, the cost is low, the reaction time is short, and the reaction conditions are mild.