53results about How to "Effective quenching" patented technology

The invention relates to a solar cell packaging EVA adhesive film capable of resisting heat, humidity, ultraviolet light and aging, which comprises the following materials by weight portions: 100 portions of copolymer of ethylene vinyl acetate, 0.8-1.4 portions of crosslink curing agent, 0.05-0.15 portion of crosslink curing accelerator, 0.2-0.6 portion of tackifier, 0.1-0.5 portion of antioxidant, 0.05-0.25 portion of ultraviolet light stabilizer and 0.1-0.3 portion of ultraviolet light absorbent, wherein the crosslink curing agent is tert butyl peroxy 2-ethyl hexyl carbonate; the crosslink curing accelerator is triallyl isocyanurate; the tackifier is r-glycidyl ether oxy-propylltrimethoxysilane; the antioxidant is one or two selected from the group consisting of bis(2,4-dicumylphenyl)pentaerythritol diphosphite, distearyl pentaerythritol diphosphite, tris(nonyl phenyl)phosphate and tris(2,4-butylphenyl)phosphate; and ultraviolet light absorbent is gas phase silicon dioxide. The solar cell packaging EVA adhesive film can resist high temperature of 85 DEG C, humidity of 85 percent, ultraviolet light and thermal oxidative aging.

The invention relates to an electrochemiluminescence immunosensor for detecting beta-amyloid protein and construction of the electrochemiluminescence immunosensor. The sensor comprises a magnetic glassy carbon electrode and Fe3O4-expoxy, a mesoporous carbon @Ru(bpy)32+/beta-amyloid protein antibody composite nanometer composite material, beta-amyloid protein to be detected with different concentrations and a gold nanorod-beta- beta-amyloid protein aptamer nanometer composite material, wherein the Fe3O4-expoxy, the mesoporous carbon @Ru(bpy)32+/beta-amyloid protein antibody composite nanometer composite material, beta-amyloid protein to be detected with different concentrations and the gold nanorod-beta- beta-amyloid protein aptamer nanometer composite material are synthesized on the surface of the magnetic glassy carbon electrode in sequence. Compared with the prior art, the electrochemiluminescence immunosensor has the advantages that the constructing method is simple, detection on Alzheimer's disease markers (beta-amyloid protein and the like) is high in speed, high in sensitivity, high in specificity, low in detection limit, wide in detection range and the like, and the application of the electrochemiluminescence immunosensor provides a new thought for early diagnosis of the Alzheimer's disease and detection of markers of other diseases.

The invention belongs to the technical field of food, and more specifically relates to a color/fluorescence double signal visible rapid nitrite detection method, and applications thereof. The color/fluorescence double signal visible rapid nitrite detection method comprises following steps: firstly, a carbon dot-neutral red composite system is prepared, wherein carbon dot synthesis and constructionof the carbon dot-neutral red composite system are carried out; a common filter paper is immersed in the carbon dot-neutral red composite system so as to obtain a carbon dot-neutral red composite system detection test paper; a sodium nitrite standard solution is prepared; a color standard colourimetric card and a fluorescence standard colourimetric card of nitrites are prepared; a software is adopted to extract the RGB values of each test paper, a matrix is constructed, and a multivariate linear regression model is constructed; and the content of nitrites in food to be detected is detected. The carbon dot-neutral red composite system possess color/fluorescence double response capacity on nitrites; detection operation steps are simple; the visible results are clear, visual, and accurate; the detection limit is lower; and it is promising for the color/fluorescence double signal visible rapid nitrite detection method to be used in large-scale food nitrite content detection.

The invention discloses a hexapeptide stock solution and a preparation method thereof. A hexapeptide stock solution, the composition includes the following main components: maltooligosaccharide glucoside/hydrogenated starch hydrolyzate 0.2-0.7%, butanediol/water/peony root extract 0.1-0.5%, acetyl hexapeptide ‑80.5~1.6%, yeast extract 0.4~1.6%, salicylic acid/dextrin/xanthan gum/pullulan 0.2~0.7%, carnosine 0.1~0.21%. The hexapeptide stock solution prepared by the invention has good anti-aging and moisturizing effects.

The invention relates to a DNA fluorescent probe and a preparation method thereof. The DNA fluorescent probe is characterized in that semiconductor light emitting nanoparticles CdTe/CdS/ZnS are used as a fluorescence emitting energy feeder, gold nanoparticles are used as a fluorescence absorbing energy receptor, and the CdTe/CdS/ZnS nanoparticles are connected with single-chain NH2-DNA, thus forming CdTe/CdS/ZnS-DNA; the gold nanoparticles are connected with single-chain SH-DNA, thus forming Au-DNA; the single-chain SH-DNA and the NH2-DNA are complementary to each other, and the DNA fluorescent probe is formed by hybridization of the CdTe/CdS/ZnS-DNA and Au-DNA. The preparation method of the DNA fluorescent probe firstly prepares the semiconductor light emitting nanoparticles CdTe/CdS/ZnS and the CdTe/CdS/ZnS-DNA, prepares the gold nanoparticles and the Au-DNA nanoparticles, connects the CdTe/CdS/ZnS-DNA (energy feeder) and the Au-DNA (energy receptor), and finally prepares the DNA fluorescent probe.

The invention discloses a hyaluronic acid skin protection composition. The hyaluronic acid skin protection composition comprises: 1) a sulfhydrylated derivative of hyaluronic acid; and 2) at least one molecular weight of hyaluronic acid or salt thereof. The composition has unique advantages when used for skin protection, not only has multiple skin protection effects of the hyaluronic acid, but also has strong antioxidant capacity, and can effectively scavenge active oxygen radicals.

The invention provides a plasma waste gas treatment device and method, and belongs to the technical field of waste gas treatment.The plasma waste gas treatment device comprises a thermal reaction system, an air inlet system, a cooling system, a multistage purification washing system, an exhaust system and a liquid circulating system, and the structureis compact, safe and reliable.The plasma wastegas treatment method comprises the following steps of: carrying out high-temperature cracking reaction after waste gas to be treated enters into the thermal reaction system through the air inlet system, and carrying out quenching and preliminary purification after entering the cooling system; carrying out washing and purification for a plurality of times after entering the multistage washing system; finally discharging the waste gas from a chimney through a dehydration layer under the action of an induced draft fan.The waste gas is subjected to high-temperature cracking, cooling, preliminary purification and multistage purification, so that the purification speed is obviously improved; and the waste gas which can be treated by the method comprises perfluorides, inflammable substances, corrosion, poisons and the like, the purification is thorough, the method is safe and reliable.

The invention discloses a preparation method of a hydroxyl modified metal organic framework material fluorescent probe, and fluoride detection application of the fluorescent probe, and belongs to thetechnical field of fluorescent sensing. A hydroxyl modified metal organic framework material (MIL-53(Al)-OH) is prepared by taking aluminium nitrate hexahydrate as a metal salt ligand and 2,5-dihydroxyterephthalic acid as an organic ligand in an N,N-dimethylformamide solvent through solvothermal reaction. The material is ultrasonically dispersed in Tris-HCl buffer solution, so that the fluorescentprobe MIL-53(Al)-OH-Tris can be prepared; under the 365 nm excitation wavelength, the MIL-53(Al)-OH-Tris fluorescent probe has a strong fluorescence emission peak at 515 nm; and thus, the fluorescentprobe can be used for sensitive detection of fluoride ions.

The invention discloses pre-orientated polyester filament yarn and a manufacturing method thereof. The manufacturing method comprises the following steps that 1, a fiber-grade PET board is cut into chips, and the PET chips are dried for twice to enable the moisture content of the PET chips to be smaller than or equal to 25 ppm; dried PET chips are fused, hexadecyl trimethyl silver ammonium bromide, 1,1'-sulfo-bis(2-naphthol), 2-hydroxybenzophenone and a nickelous EDTA complex are added after the dried PET chips are completely fused, and after the materials are evenly mixed, filamentation is performed through extrusion forming and cooling is performed; 2, PET yarn obtained in the step 1 is sequentially processed through collecting through a first roller, heating through an upper heating box, twisting through a heater, drawing through a second roller, sizing through a lower heating box, further sizing through a third roller, oiling through an oiling device and forming through a winding roll to obtain the pre-orientated polyester filament yarn, wherein a chemical fiber oiling agent is contained in the oiling device, and the production speed of the pre-orientated polyester filament yarn is controlled at 3300 rad/min. The pre-orientated polyester filament yarn has the better anti-ultraviolet property and the higher breaking strength.

The invention relates to a preparation method of levodopa nanoparticles and biosensing application of the levodopa nanoparticles, and belongs to the technical field of nano biosensing. Levodopa (L-DA)is used as a unique precursor to synthesize levodopa nanoparticles (LNDS) at room temperature, and the formed LNDS can quickly and effectively quench a dye-labeled oligonucleotide fluorescent probe (FAM-DNA) through electrostatic interaction. Complementary deoxyribonucleic acid (cDNA) or adenosine triphosphate (ATP) is competitively combined with a fluorescent probe, so that fluorescence is recovered, and an effective sensing platform for detecting biomolecules is constructed. In addition, the sensing platform can also perform high-sensitivity and selective detection on adenosine triphosphatein a complex system (human serum). The synthetic process of the levodopa nanoparticles is simple and environmentally friendly, the toxic and side effects on cells and organisms are low, the levodopananoparticles have a very strong quenching effect on dye-labeled oligonucleotides, the background fluorescence is greatly reduced, and the signal-to-noise ratio is increased.

The invention discloses a chemical treatment preparation for improving the yield of wheat and a chemical treatment method. The chemical treatment preparation comprises gamma-aminobutyric acid, vitaminB6 and a potassium phosphate buffer solution with the pH of 6.5-6.7, wherein 5-10 g of gamma-aminobutyric acid and 2-5 g of vitamin B6 are added into each L of the potassium phosphate buffer solution. The chemical treatment preparation is wholly and uniformly sprayed onto wheat canopy 5-9 days after flowering of wheat every 2-3 days for two times. Gamma-aminobutyric acid is utilized to improve the leaf chlorophyll content and the photosynthetic efficiency, so that the thousand seed weight principle of wheat grains is improved; vitamin B6 is utilized to achieve physiological actions of regulating C and N metabolism, maintaining the stability of a membrane system under adversity and removing active oxygen; and potassium phosphate is utilized to achieve the functions of regulating the pH value and serving as a nutritional element. The chemical treatment preparation is simple to prepare and feasible and reliable in method, and therefore, is an environment-friendly chemical treatment preparation.

The invention relates to a production device and method of molybdenum oxide nanoparticles, aiming to solve the technical problems of unstable product quality, complex production procedures and low production efficiency in the production of molybdenum oxide nanoparticles in the prior art. The production device comprises a gasifying unit, a quenching unit and a collecting unit, wherein the gasifying unit is used for gasifying the precursor material of molybdenum oxide nanoparticles, the quenching unit is used for quenching the gasified molybdenum oxide nanoparticles, and the collecting unit is used for collecting the finished molybdenum oxide nanoparticles. The production device and method have the advantages of high production efficiency and stable product quality.

The invention belongs to the field of cosmetics, and particularly relates to an eye anti-aging composition and application thereof. The eye anti-aging composition is prepared from the following components in parts by mass: 0.5-2 parts of aesculus chinensis extract, 2.5-4 parts of dendrobium officinale extract, 1 to 4 parts of peach resin extract, 1-4 parts of carnosine and 0.5-5 parts of [beta]-glucan. The eye anti-aging composition is scientific in proportion, the active ingredients such as the aesculus chinensis extract, the dendrobium officinale extract, the peach resin extract, the carnosine and the [beta]-glucan contained in the eye anti-aging composition have an obvious synergistic gain effect, the eye anti-aging composition has obvious effects of tightening skin and smoothing fine wrinkles, and compared with existing eye skin care cream, the eye anti-aging composition is relatively refreshing and easy to absorb, and does not cause burden to eye skin.

The invention provides a compound natural antioxidant for keratin preparation and a preparation method of nanoemulsion of the compound natural antioxidant. The compound natural antioxidant comprises flavonoid, polysaccharide active matter, and one or more of vitamins A, C and E extracted from natural plants, and reduced glutathione-S-monoether. The compound natural antioxidant is further prepared into the nanoemulsion with high solubility in water, is applied to a keratin preparation technology and has the advantages of environmental protection and high oxidation resistance; furthermore, ingredient structures of the compound natural antioxidant are complete and reasonable; and the compound natural antioxidant has strong synergism, and can carry out oxidation protection during the whole course from a hydrolysis production process of keratin to a protein product to ensure safety and sanitation of the protein product from beginning to end.

The invention discloses a molybdenum disulfide quantum dot-chiral gold nano particle assembly and a preparation method and application thereof. Molybdenum disulfide quantum dots prepared by a hydrothermal method are taken as a fluorescent luminous body, N-acetyl-L-cysteine functionalized chiral gold nano particles and molybdenum disulfide quantum dots are combined and assembled into a molybdenum disulfide quantum dot chiral gold nano particle assembly. After the chiral gold nano particles are combined with the molybdenum disulfide quantum dots, the photo-induced electron transfer effect is generated, so that the fluorescence of the molybdenum disulfide quantum dots can be effectively quenched, after protein amino acidenantiomer with chirality is added, the protein amino acid enantiomer canbe combined with N-acetyl-L-cysteine on the surfaces of the chiral gold nano particles through hydrogen bonds, so that the chiral gold nano particles are induced to be agglomerated to different degrees, electron transfer is blocked, fluorescence of the molybdenum disulfide quantum dots is recovered, and chiral recognition of the protein amino acid enantiomer is realized.

The invention provides identification and detection methods for RNA specificity by a boric acid-nanometer particle system, and belongs to the technical field of nucleic acid detection. Phenylboronic acid molecules containing sulfydryl are modified on the surfaces of gold and silver nanometer particles through a mercaptan self-assembly mode to form the PBA-NPs system. The PBA-NPs system can be effectively combined with RNA for signal marking and amplification. The PBA-NPs system has the greatest advantage that RNA and DNA with the same base sequence can be selectively differentiated and can becombined with multiple nucleic acid detection technologies for use to achieve specificity detection on RNA of the specific sequence.

The invention relates to a quenching and collecting device for gasified molybdenum oxide nanoparticles, aiming to solve the technical problems of unstable product quality, complex procedures and low efficiency in the production of molybdenum oxide nanoparticles in the prior art. The quenching and collecting device comprises a gasifying furnace, a quenching unit and a collecting unit, wherein the gasifying unit is used for gasifying the precursor material of molybdenum oxide nanoparticles, the quenching unit is used for quenching the gasified molybdenum oxide nanoparticles, and the collecting unit is used for collecting the finished molybdenum oxide nanoparticles; the quenching unit comprises a converging pipe and a collecting pipe; the upper end of the converging pipe is closed, and the lower end of the converging pipe is provided with an opening; the gas outlet of the collecting pipe is correspondingly arranged on the middle-upper part of the converging pipe and is correspondingly connected with inner hollow cavity of the converging pipe; the lower-end opening of the converging pipe is correspondingly communicated with the collecting unit; the collecting pipe is internally provided with a quenching liquid pipe, and the quenching liquid pipe is correspondingly communicated with a quenching liquid source; and the outlet of the quenching liquid pipe is opposite to the gas outlet of the collecting pipe.

The invention provides a quench tower for a sulphur recycle device. The quench tower comprises a cylindrical quench tower body and a pre-cooling segment connected with the tower bottom of the quench tower body. A gas inlet of the quench tower is formed in the top end of the pre-cooling segment, the top of the quench tower body is provided with a gas outlet, and the top of the quench tower body isprovided with a fresh water supplement port and a circulation water spray inlet. A liquid outlet of the quench tower is connected with an inlet of a circulation pump, an outlet of the circulation pumpcommunicates with spray devices through pipes, and the spray devices are located in the pre-cooling segment and the quench tower body separately.

The invention provides a preparation method of an ethylene diamine functionalized carbon quantum dot and application thereof in catechol detection. Ethylene diamine is introduced to the surfaces of the carbon quantum dot through amidation reaction and a protection/de-protection method to synthesize the ethylene diamine functionalized carbon quantum dot, the preparation process is simple, the raw material source is wide, the price is low, and the obtained compound has a target detection substance selective binding function. In a neutral environment, catechol can quickly react with ethylene diamine on the surface of the ethylene diamine functionalized carbon quantum dot to generate a static compound, and the static compound causes synchronous quenching of nuclear-state and surface-state fluorescence of the ethylene diamine functionalized carbon quantum dot. The catechol concentration and the fluorescence quenching value of the ethylene diamine functionalized carbon quantum dot have a good linear relationship, and the detection limit reaches 0.07 mg/L. According to the invention, a simple and rapid catechol fluorescence quantitative analysis method is established, and has extremely high selectivity and interference resistance for catechol detection.