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316results about How to "Easy to synthesize" patented technology

Release-controllable antibiotic hydrogel and preparation method and application thereof

ActiveCN106822911AAvoid drug burstEasy to synthesizeAntibacterial agentsAerosol deliveryChemistryAminoglycoside
The invention relates to a release-controllable antibiotic hydrogel and a preparation method and application thereof. The release-controllable antibiotic hydrogel based on aminoglycoside antibiotics is formed by crosslinking the oxidized polysaccharide macromolecules and the aminoglycoside antibiotics through acid-sensitive schiff base groups; the schiff base bonds are broken under the acid environment produced by bacteria infection, so that the gel is degraded, and the antibiotics is released according to requirements. The invention also provides antibacterial application of the oxidized polysaccharide-aminoglycoside antibiotics hydrogel in vitro and in vivo. The release-controllable antibiotic hydrogel has the advantages that the preparation is simple, and the cost is low; the strength, shape and degrading of the gel, the medicine release rate and the like can be controlled according to the content of antibiotics, the broad-spectrum high-efficiency antibacterial property is realized, and the antibacterial effect is better than the antibacterial effect of multiple types of commercial antibacterial gels on market; the hydrogel may be prepared into creams, implants and medical apparatus coatings, so as to resist the infection by gram-negative bacterium, gram-positive bacterium and the like.
Owner:EAST CHINA NORMAL UNIVERSITY

Method for synthesizing silver nanoclusters by aid of single-stranded DNA (deoxyribonucleic acid) used as template

The invention provides a method for synthesizing silver nanoclusters by the aid of single-stranded DNA (deoxyribonucleic acid) used as a template, and belongs to the technical field of nano materials. By the method, problems of complicated production and excessively high cost of nano-silver for detecting mercury ions at present are solved. The method for synthesizing the silver nanoclusters by the aid of the single-stranded DNA used as the template is characterized in that the single-stranded DNA containing cytosine and guanine is used as the template and is mixed with Ag<+> solution to obtain a mixture, reducing agents are added into the mixture, and the fluorescent silver nanoclusters can be acquired after reduction reaction is performed on the mixture with the reducing agents. The method has the advantages that polyinosinic acid (PI) and polycytidylic acid (PC) which are commercially available are used as the template in the simple, low-cost, environment-friendly and reliable method for synthesizing the silver nanoclusters; fluorescence is utilized, and fluorescent silver nanocrystals are synthesized from the polyinosinic acid, the polycytidylic acid and the like without special design or preprocessing; and the novel silver nanoclusters are excellent in selectivity and sensitivity, can be applied to detecting Hg<2+>, and are feasible and have a future development prospect in the aspect of monitoring pollutants in water.
Owner:ZHEJIANG NORMAL UNIVERSITY

Method for preparing mordenite molecular sieve

The invention relates to a method for preparing a mordenite molecular sieve. The method comprises the following steps of: dissolving an aluminum source in a sodium hydroxide solution, adding silicon sources, stirring at room temperature by strong magnetic force, and dispersing for a period of time; mixing the silicon sources which are dispersed uniformly and an aluminum source solution to form glue, adding a zeolite molecular sieve containing a five-membered ring as a crystal seed, stirring and mixing uniformly by the strong magnetic force at room temperature, and transferring the mixture into a reaction crystallization kettle, and performing crystallization reaction at the temperature of between 150 and 170 DEG C for 0.5 to 3 days; and performing suction filtration, washing and drying conventionally to obtain the mordenite molecular sieve. According to the method, an expensive organic amine template agent is not used as a structure guiding agent, and the zeolite molecular sieve which is wide in using, low in cost and readily available and contains the five-membered ring is used as the crystal seed to synthesize the mordenite molecular sieve with a high silica-alumina ratio directly, so the prepared mordenite molecular sieve has the advantages of high crystallinity and purity, controllable granular sizes and appearance, high yield, convenience for industrial production and the like.
Owner:EAST CHINA NORMAL UNIVERSITY

Ionic liquid compound with anion containing double Lewis base functional groups, preparation method thereof and application thereof

Provided is an ionic liquid compound with anion containing double Lewis base functional groups. A cation of the ionic liquid compound with the anion containing the double Lewis base functional groups is tetra-alkyl quaternary ammonium, tetra-alkyl quaternary phosphine or N, N-dialkyl-imidazole. The anion is an organic anion which simultaneously contains a carboxylate radical perssad with weak Lewis basicity and a tertiary amine perssad (trialkylamine or tertiary amine on a heterocycle) with the weak Lewis basicity. The ionic liquid compound with the anion containing the double Lewis base functional groups is used for selectively removing hydrogen sulfide (H2S). When partial pressure of the H2S is respectively 10kPa, 20kPa, 50kPa and 100kPa, a molar ratio between an absorptive amount of the H2S and the ionic liquid compound with the anion containing the double Lewis base functional groups is respectively 0.409, 0.484, 0.638 and 0.809. When the partial pressure of the H2S is respectively 10kPa, 20kPa, 50kPa and 100kPa, ideal absorption selectivity of the ionic liquid compound with the anion containing the double Lewis base functional groups to H2S/carbon dioxide (CO2) is respectively 60.3, 39.1, 21.8 and 15.8. The invention discloses a preparation method of the ionic liquid compound with the anion containing the double Lewis base functional groups.
Owner:NANJING UNIV

360-degree panoramic camera module and electronic equipment

The invention discloses a 360-degree panoramic camera module. The 360-degree panoramic camera module comprises a front-facing fish-eye lens, a rear-facing fish-eye lens and an image processor, wherein the front-facing fish-eye lens and the rear-facing fish-eye lens are arranged back to back, and field angles of the front-facing fish-eye lens and the rear-facing fish-eye lens are greater than or equal to 180 degrees; the image processor is used for synthesizing a first image taken by the front-facing fish-eye lens and a second image taken by the rear-facing fish-eye lens into one 360-degree panoramic image; an optical center of the front-facing fish-eye lens and an optical center of the rear-facing fish-eye lens are positioned on the same axis; and the image processor is connected with the front-facing fish-eye lens and the rear-facing fish-eye lens. In the 360-degree panoramic camera module, the front-facing fish-eye lens and the rear-facing fish-eye lens are designed in a back-to-back way, so that the aim of 360-degree all-angle-of-view shooting can be fulfilled instantly. Meanwhile, the optical centers of the front and back fish-eye lenses are positioned on the same axis, namely, central optical axes of the front and back fish-eye lenses are consistent, so that a difference between the taken images can be avoided, and the image processor can perform image synthesis processing more conveniently. The invention also discloses electronic equipment.
Owner:TRULY OPTO ELECTRONICS

Preparation method and application of triphenylamino metal organic framework compound capable of catalyzing carbon dioxide-epoxy compound cycloaddition

The invention belongs to the technical field of catalytic materials, and relates to a preparation method and application of a triphenylamino metal organic framework compound capable of catalyzing carbon dioxide-epoxy compound cycloaddition. The preparation method comprises the following steps: 1. adding a connection ligand L and a transition metal salt Tm in a mole ratio of 1:(3-5) into a mixed solvent composed of ethanol and N,N-diethyl formamide in a volume ratio of 1:(2-2.5) or a mixed solvent composed of concentrated nitric acid and N,N-dimethylformamide in a volume ratio of 1:(6-8), and uniformly stirring; and 2. putting the solution prepared in the step 1 into a drying oven, drying for 60-90 hours while controlling the temperature at 60-120 DEG C, shutting down the drying oven, cooling to room temperature to precipitate a crystal, filtering and drying to obtain the target material Tm-L. The catalyst synthesis process is simple and easy to operate, and has the advantages of low raw material price for the catalyst and catalytic reaction, and high yield. The obtained functional material has stable chemical properties, and can easily implement large-area popularization and application.
Owner:DALIAN UNIV OF TECH

Preparation method of visible-light catalyst

InactiveCN104014355AIncrease the effective surface areaEasy to synthesizeMaterial nanotechnologyPhysical/chemical process catalystsMethyl orangeChemistry
The invention relates to a preparation method of a visible-light catalyst, and belongs to preparation methods of catalysts. The visible-light catalyst is of a composite structure of cobalt phosphate Co3(PO4)2 nanosheets and silver phosphate Ag3PO4 nanoparticless and is prepared by adopting a chemical segregation method which comprises the following steps of preparing a mixed solution of silver nitrate AgNO3 and cobalt nitrate Co(NO3)3 in advance, and then dropwise adding a diammonium hydrogen phosphate (NH4)2HPO4 solution until a large amount of precipitation is generated. In the process of degrading methyl orange by visible light, compared with pure silver phosphate Ag3PO4 with the same quality, the composite structure has the advantage that both the stability and the photooxidation activity are obviously improved. The composite structure can be used for processing and degrading dye wastewater such as methyl orange and photolyzing water to prepare hydrogen or oxygen, and when sunlight is captured, photon-generated carriers are effectively promoted to transfer. The composite structure has the advantages of large effective surface area, simplicity in synthesis and good interfacial lattice matching and is favorable for improving the catalytic activity, and the photocatalytic activity can be further optimized by controlling the proportion of two components.
Owner:CHINA UNIV OF MINING & TECH
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