961results about How to "Improve photostability" patented technology

There is provided a composition comprising one or more photoactive compounds and one or more optimization agents. Surprisingly, the composition requires a small amount of optimization agent to efficiently optimize the polarity, critical wavelength, SPF, PFA, Star Rating, photostability, or any combinations thereof, of the composition. Subsequently, an efficient sunscreen composition is achieved.

There is provided a composition comprising one or more photoactive compounds and one or more optimization agents. Surprisingly, the composition requires a small amount of optimization agent to efficiently optimize the polarity, critical wavelength, SPF, PFA, Star Rating, photostability, or any combinations thereof, of the composition. Subsequently, an efficient sunscreen composition is achieved.

The present invention relates to fluorescent dyes in general. The present invention provides a wide range of fluorescent dyes and kits containing the same, which are applicable for labeling a variety of biomolecules, cells and microorganisms. The present invention also provides various methods of using the fluorescent dyes for research and development, forensic identification, environmental studies, diagnosis, prognosis, and / or treatment of disease conditions.

The invention relates to an oil-based lubricating composite and a preparation method thereof, in particular to a water-based copper and aluminum wiredrawing oil composite and a preparation method thereof. The water-based copper and aluminum wiredrawing oil composite comprises base oil, an emulsifier, an auxiliary emulsifier, a defoaming agent, a rust-proof agent, an antiseptic and an antiwear agent. The preparation method comprises the following steps of: configuring the water-based copper and aluminum wiredrawing oil composite into 3 percent to 45 percent water-based emulsion according to weight percentage; and spraying the water-based emulsion into a wiredrawing die cavity in the copper and aluminum wiredrawing process. The water-based copper and aluminum wiredrawing oil composite has the advantages of excellent lubricating property, great optimal light stability and storage stability, low cost, good cooling effect, fast heat transfer, little temperature increase in the using process, difficult combustion and easy cleaning and ensures the safety of the service environment; and in addition, a copper wire and an aluminum wire drawn by the method have the advantages of uniform wireshape, bright surfaces, difficult corrosion, good ultraviolet and storage stability and good stability.

Compounds of Formula I: whereinR, R1 and R2 are each independently hydrogen or linear or branched C1 to C10 alkyl, or linear or branched C1 to C10 alkoxy;R3 is selected from the group consisting of COCH3, CO2R7, CONH2, CON(R8)2, CN, COX(CH2)n-N—(R4)(R5)(R6), and the quaternized salt form of the formula COX(CH2)n-N—(R4)(R5)(R6)+Y−;X is O or NH;n is an integer of 1 to 5;Y is an anion;R4, R5 and R6 are independently linear or branched C1 to C30 alkyl; andR7 and R8 are independently hydrogen or linear or branched C1-C30 alkyl.Sunscreen formulations containing compounds of Formula I, and methods for protecting hair, skin and substrates such as polymers, textiles, fabrics, leathers and paints using the compounds herein.

A single step milling and surface coating process allows for production of a stable dispersion of surface coated nanoparticles in an efficient manner. The process comprises providing feed particles, providing a coating agent, and generating the stable dispersion of surface coated nanoparticles by milling the feed particles in an aqueous medium containing the coating agent such that the coating agent bonds to surfaces of the feed particles as the feed particles are milled to an average particle size of less than about 100 nm.

A melt-processed polyolefin composition or composite includes a polyolefin compounded with a hindered amine light stabilizer, an organodisulfide antioxidant, and silver sulfate as an antimicrobial agent. A process of preparing such a composite includes compounding all of the compounds in various orders as long as the silver sulfate is added after the hindered amine light stabilizer is added to the polymer.

The composite lubricating oil stabilizer includes the following components: ultraviolet ray absorbent and light stabilizer of hindered amine in the weight ratio of 1-5 and total content inside the composite lubricating oil stabilizer of 40-80 wt%; antioxidant selected from the shielding phenol, aromatic amine, phenolic ester, metal phosphate-sulfate and carbamate sulfide in 15-45 wt%; and phenyl phosphite as chelating agent in 3-18 wt%. The composite lubricating oil stabilizer of the present invention may be added into the base oil of hydrogenated lubricating oil in the amount of 0.01-2.0 wt% to improve the light stability of the hydrogenated lubricating oil obviously.

The invention discloses a method for preparing a photocatalyst for the sensitization of TiO2 nanotubes by semiconductor quantum dots, which comprises: firstly, obtaining TiO2 nanotube powder by using an acid and alkali hydrothermal synthesis method; secondly, mixing and stirring the nanotube powder and thioglycollic acid to perform a reaction at 50 to 100 DEG C for several hours, adding the reaction solution into solution of nitrate, adjusting the pH value of the mixed solution, stirring the mixed solution, filtering the mixed solution, washing an obtained precipitate, adding the precipitate into solution of Na2S, stirring the solution, filtering the solution and washing the resulting product to obtain the TiO2 nanotubes sensitized by the semiconductor quantum dots; or synthesizing solution of quantum dots, ultrasonically mixing the solution with the nanotube powder, filtering a resulting product and washing the resulting product to obtain the TiO2 nanotubes sensitized by the semiconductor quantum dots. The method of the invention is simple, easy to implement, safe and energy-saving and can be used in dye and environmental protection industries and used for developing solar cells.

A particulate metal oxide having a coating layer comprising phosphate wherein the mean length of the primary particles is in the range from 50 to 90 nm, and the mean width of the primary particles is in the range from 5 to 20 nm. The metal oxide is particularly suitable for forming aqueous dispersions. The metal oxide and aqueous dispersions thereof can be used in a sunscreen product that exhibits both effective UV protection and improved transparency.

The invention discloses a technique for preparing antimicrobial peptide by using Bacillus subtilis, belonging to the technical field of bioengineering. By using Bacillus subtilis BRT39 capable of generating broad-spectrum high-efficiency antimicrobial peptide as a production strain, liquid seed preparation, fermentation liquid preparation, fermentation liquid pretreatment, antimicrobial peptide extraction and refinement, antimicrobial peptide dry powder preparation and other techniques are carried out to prepare the high-purity antimicrobial peptide finished product, wherein the activity recovery rate is up to higher than 43.5%. The invention has the advantages of simple technique, high yield of antimicrobial peptide, and high purity; the prepared antimicrobial peptide dry powder belongs to a natural antimicrobial agent and has no toxic or side effect, and thus, can be used as a food preservative, feed additive, agricultural biological control agent or animal disease preventing agent; and the antimicrobial peptide has the advantages of no toxicity, no residue, no drug resistance and high safety.

An inkjet recording element comprising a support coated with an immiscible polymer blend to overcome limitations of existing hydrophilic materials for extrusion coating. The two phases correspond, respectively to a first composition comprising a hydrophobic thermoplastic polymer such as a polyolefin, which does not absorb water, and a second composition comprising a hydrophilic thermoplastic polymer, for example, polyvinyl alcohol, modified ethyl vinyl alcohol, polyether block polyamide, or the like. The characteristics of the polymers are such that hydrophilic thermoplastic polymer encapsulates the polyethylene layer during extrusion and produces a swellable inkjet receiver layer. Also disclosed are methods for making and a method of printing on such inkjet recording elements.

The invention discloses a silicon nitride membrane strained GeSn infrared LED device and a preparation method thereof. The infrared LED device comprises an Si substrate and a Ge buffer layer arranged on the silicon substrate, wherein the Ge buffer layer is successively provided with an aluminum electrode, a transverse P-I-N GeSn layer, a silicon nitride layer and an aluminum electrode from the left to the right, and a silicon nitride film is deposited above a GeSn P-I-N structure. According to the invention, the device and the method are compatible with a CMOS process, the problem of difficulty in growing a GeSn alloy with a high stannum ingredient content in the prior art is overcome, the stress size can be changed through adjusting the structure of a silicon nitride membrane so as to realize the demand of a GeSn material light source for different-wavelength light, the photoelectric conversion efficiency is quite high, the light stability is high, the processing is simple and convenient, and a concrete structure and a concrete implementation scheme are provided for realization of a light source on chip.

The invention relates to a primary composition in which at least one lipophilic bioactive compound is mixed with a whey protein, present in an amount effective to increase the bioavailability of the lipophilic bioactive compound. The invention also relates to an oral composition that contains the primary composition in a foodstuff, in a food supplement, or in a pharmaceutical preparation, and to a cosmetic preparation that contains the primary composition. Methods for increasing the bioavailability of the lipophilic bioactive compound and providing increased photostability and oxidation resistance are also provided.

The invention relates to a perovskite photovoltaic cell with bilayer nanometer mesoporous electron-transporting layer and preparation method thereof. The cell comprises a conducting substrate, an electron-transporting layer with double-layer structure, a perovskite light absorption layer, a hole-transporting layer and metal electrodes. The perovskite photovoltaic cell with bilayer nanometer mesoporous electron-transporting layer has the advantages that the SnO2 with one step method low-temperature growth, is used as the electron-transporting layer in the photovoltaic cell, replaces the TiO2 electron-transporting layer with two steps method high temperature sintering, and the preparation process is simplified. The mesoporous perovskite photovoltaic cell prepared with one step low-temperature growth method obtains 13.82% of highlight electricity transfer efficiency, and reduces the manufacturing cost effectively at the same time. Compared with a planer construction, the mesoporous structure used in the perovskite photovoltaic cell is liable for the adherence of the perovskite light absorption material. SnO2 conducts a smaller dissimilation on the perovskite light absorption layer than the TiO2 does, the performance and stability of the cell are improved in this way. The perovskite photovoltaic cell with bilayer nanometer mesoporous electron-transporting layer and preparation method thereof plays a great promoting role in the development and popularization on the flexible solar cell, and further promotes the industrialized application on the perovskite solar cell.

The invention discloses a compounded botanical synergistic fungicide containing sophocarpidine and osthol. The obtained compounded botanical synergistic fungicide takes sophocarpidine and osthol as main components, and is added with accessory ingredients in a synergistic manner; the morphology of the compounded botanical synergistic fungicide is environment-friendly missible oil, microemulsion, aqueous solution or soluble liquid; and in addition, the compounded botanical synergistic fungicide contains sophocarpidine accounting for 0.1 to 20 percent and osthol accounting for 0.1 to 20 percent, and the rest is the accessory ingredients. The compounded botanical synergistic fungicide is mainly used for controlling downy mildew, gray mold, anthracnose, powdery mildew, cladosporium cucumerinum, soft rot and basal stem rot. The compounded botanical synergistic fungicide does not contain any chemical pesticide component, is easy to degrade in environment, has no consideration of environment pollution and residual hazard, is safe to human, livestock and environment; germs are not easy to be drug-resistant to the compounded botanical synergistic fungicide; the compounded botanical synergistic fungicide is of great value to be applied and popularized on main agricultural and sideline products that earn foreign exchange through exports, such as melons, fruits, vegetables, tea leaves and medicinal materials; and in addition, the compounded botanical synergistic fungicide is an ideal novel pollution-free bactericide.

An injection moulding process for making a completely recyclable, multilayered article which contains:i) a rigid layer formed of a thermoplastic polymer andii) a foamed skin layer formed of a thermoplastic polymer compatible with the material of the rigid layer, byinjection moulding of the rigid layer into a mould composed of two sides,lifting one side of the mould, or change one side of the mould to obtain a small gap of between 3 to 4 mm between the rigid layer and the side of the mould lifted or changed andinjecting the foamed skin layer into the gap formed in step b).

A light-emitting module (1) includes: a package (10); a base board (13) and a semiconductor multi-layered film (50) accommodated in the package (10); and a plurality of terminal portions (16) for supplying electricity to the semiconductor multi-layered film (50), wherein the package (10) includes a metallic support portion (11b) supporting the base board (13), a plurality of through-holes (11c) for insertion of the respective terminal portions (16), an insulating member (11d) keeping electrical insulation between the metallic support portion (11b) and the terminal portions (16), and between the respective terminal portions (16), and a window portion (12a); the base board (13) is made of an inorganic heat-dissipating material that keeps electrical insulation between the semiconductor multi-layered film (50) and the metallic support portion (11b); and one opening of each of the through-holes (11c) is provided on a side surface of the package (10). Because of this, a light-emitting module is provided, which can keep heat dissipation and has high heat resistance and light stability.

Semiconductor nanocrystal compositions comprising magnesium containing shells and methods of preparing them are described. The compositions provide strong emission in the blue and green wavelengths as well as chemical and photostability that have not been achieved with conventional shell materials.

Disclosed is a nanocomposite. The nanocomposite includes a wax particle, at least one nano light-emitting body positioned inside the wax particle, and a silicon oxide protective layer for coating the nano light-emitting body. The nanocomposite can improve light stability and heat / moisture stability of the nano light-emitting body.

The invention provides a red fluorescent gold / copper nanocluster alloy as well as a preparation method and an application thereof. Egg white is taken as a template and a stabilizer, and the red fluorescent gold / copper nanocluster alloy with uniform size dimension and good stability is prepared from gold / copper in certain mole ratio with a one-pot method. The method is simple to operate, and the raw materials are widely sourced and easy to obtain and has good repeatability; besides, the prepared red fluorescent gold / copper nanocluster alloy has good water solubility and high fluorescent stability, adopts a double-peak structure and can be used for detection of silver ions in a water system, biological cell imaging and the like.

An object of the present invention is to provide an agricultural chemical formulation which is able to control release of an agricultural chemical active ingredient. This agricultural chemical formulation includes a composition, containing an agricultural chemical active ingredient, styrene-maleic anhydride copolymer or mixture of styrene-maleic anhydride copolymer and polymer having repeating units derived from rosin or derivative thereof or salicylic acid or derivative thereof, and a release controller (a water-soluble polymer, a hydrophobically-treated silicon oxide, or a surfactant), forming a compatible state or matrix.

The invention relates to polymerization fluorescent dye, a preparation method and application thereof. The polymerization fluorescent dye has the structure of the following general formula, wherein D is a fluorescent dye base body, Z is a connection group containing functional groups capable of polymerizing, and n is 1 or 2. The polymerization fluorescent dye has the advantages of being high in photostability and fluorescence quantum yield and can be used under severe conditions of laser reading, laser scanning, neon lamp lighting, outdoor conditions and the like. Fluorescent nanometer microballoon obtained through preparation can be widely applied to application of the fields of biological detecting, lighting material, printing or coating. The preparation of emulsion polymerization uses olefin double bond free radical polymerization, can embed the fluorescent dye into polymer conveniently, and can not fall. Simultaneously, monomer with benzyl chloride ethylene is led in, and chemical crosslink locus forming can be conducted. The fluorescent nanometer microballoon capable of being functionalized and prepared through the emulsion polymerization can meet the requirements.

The invention relates to a silica fluorescent nanoparticle and a preparation method thereof, in particular to an FITC-doped silica fluorescent nanoparticle and the preparation method thereof. The method particularly comprises the preparation of a precursor solution and other steps. The FITC is reacted with 3-aminopropyl trimethoxysilane to prepare a precursor, and then the novel FITC-doped silica fluorescent nanoparticle is prepared by a water-in-oil microemulsion method. The prepared nanoparticle is uniformly spherical, has good monodispersity and light stability, difficultly generates dye leakage, has good response to the pH value and can be applied to the real-time monitoring of the pH value of cells.

The invention discloses a novel passivated perovskite solar cell and a preparation method thereof. The perovskite solar cell optimizes the absorption of perovskite, so that a perovskite absorption layer contains an anti-solvent tris(pentafluorophenyl)borane to serve as a novel additive. On one hand, the addition of fluoride ions can change the crystallinity and the defect state of a perovskite film to form a high-quality perovskite film with a large grain size; the anti-solvent tris(pentafluorophenyl)borane can enhance the surface appearance of the perovskite and plays a passivation function at the grain boundary; and on the other hand, the fluoride ions can improve the hydrophobicity of the perovskite film and inhibit the phase change of the perovskite to better protect the perovskite from being destroyed by water, thereby further improving the air stability and the light stability of the cell to obtain a high-efficiency perovskite solar cell.

A series of conjugated polymer-based nanoparticles having far-red / near infrared emission ranges are disclosed. Cross coupling methods to prepare the conjugated polymers and methods of nanoparticle preparation are also discussed. The conjugated polymer nanoparticles are used as FR / NIR fluorescent probes in in vitro and in vivo biosensing and bioimaging applications, and are also used in photoacoustic imaging as contrast agents. Finally, use of the conjugated polymer nanoparticles in photothermal therapy is described.

A recording material comprising a support and a thermosensitive element containing silver behenate, an organic reducing agent therefor in thermal working relationship therewith and a binder, wherein the silver behenate is not associated with mercury and / or lead ions and when the recording material is irradiated with a copper K alpha 1 X-ray source the ratio, normalized to a quantity of silver in the recording material of 1 g per m2 thereof, of the sum of the peak heights of the X-ray diffraction lines attributable to silver behenate at Bragg angles, 2 THETA , of 6.01 DEG , 7.56 DEG , 9.12 DEG , 10.66 DEG , 12.12 DEG and 13.62 DEG to the sum of the peak heights of the X-ray diffraction lines at Bragg angles, 2 THETA , of 25.60 DEG , 35.16 DEG and 43.40 DEG of NIST standard 1976, rhombohedral Al2O3, determined with the same X-ray diffractometer in the same state of adjustment, is greater than 0.85; production processes for particles of substantially light-insensitive organic silver salt comprising silver behenate with these X-ray characteristics in the presence and substantial absence of organic solvent.

Visible-light response hybrid aerogel and a preparation method and application thereof in waste gas processing are disclosed. Dicyandiamide is taken as a precursor and is calcined in two times to prepare a carbon nitride nanosheet; the carbon nitride nanosheet is dispersed in water, silver metavanadate quantum dots are subjected to in-situ growth to prepare a silver metavanadate quantum dot / carbon nitride nanosheet composite material; the silver metavanadate quantum dot / carbon nitride nanosheet composite material and graphene oxide carry out hydrothermal reaction, and are then frozen and dried to prepare silver metavanadate quantum dot / carbon nitride nanosheet / graphene hybrid aerogel which is the visible-light response hybrid aerogel. The problems of large reduction dosage, serious secondary pollution, complexity in operation and the like generated when waste gas is processed by a traditional flue gas denitration technology are overcome.

The invention relates to the technical field of medical chemistry and particularly relates to Axitinib fumarate, a crystal form thereof and preparation methods for the Axitinib fumarate and the crystal form thereof. The prepared Axitinib fumarate and the crystal form thereof are high in Axitinib fumarate yield and high in purity. In addition, the Axitinib fumarate provided by the invention can further be used for preparing Axitinib after the Axitinib fumarate is dissociated. According to the preparation method for the Axitinib fumarate, disclosed by the invention, the Axitinib fumarate is prepared through subjecting the Axitinib and fumaric acid to a salt forming reaction. The Axitinib may be a direct crude product prepared by disclosures in the existing documents, or may also be pure Axitinib which is obtained through carrying out certain-aftertreatment impurity removal. Even if crude Axitinib and fumaric acid are subjected to salt forming, the Axitinib fumarate with high purity can be prepared through the salt forming reaction.

The invention provides a preparing method for CdSe / CdZnSeS / ZnS core-shell quantum dots. The preparing method is simple in synthesis method, short in synthesis time and high in quantum efficiency and stability, and is characterized by including the following steps that (1) zinc sources, cadmium sources, an organic solvent and organic ligand are mixed and stirred to be even, then the mixture is heated to be at the temperature of 260 DEG C to 320 DEG C, and protection gas is introduced into the whole reaction process; (2) in the stirring state, a selenium precursor and a sulfur precursor which are mixed to be even are rapidly injected; (3) after the precursors in the step (2) are completely injected, timing is started, and in 0 s to 30 s, the sulfur precursor is injected again; (4) at the temperature of 260 DEG C to 300 DEG C, the mixture is reacted for 1 min to 60 min. The preparing method for the CdSe / CdZnSeS / ZnS core-shell quantum dots has the advantages that CdZnSeS serves as a medium and is connected with a core CdSe and a shell CdS, the lattice matching performance between the cores and the shell layers of the quantum dots is high, the light stability and the heat stability between the cores and the shell layers of the quantum dots are quite high, and the yield of quantum can be 80% or above. The preparing method is simple in synthesis step, easy to operate and capable of facilitating large-scale production.