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34results about How to "Photostable" patented technology
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Preparation of water-soluble luminous silver nano cluster with double-stranded DNA as template
Provided is preparation of a water-soluble luminous silver nano cluster with double-stranded DNA as a template. Firstly, single-stranded DNA rich in cytosine base group is used, 6 cytosine base group loops are reserved in the single-stranded DNA, the total number of the cytosine base groups is 29, single-stranded DNA rich in guanine base group complements the single-stranded DNA and is added, the total number of the guanine base groups is 23, the double-stranded DNA with the 6 cytosine base group loops is formed through the annealing function and is used as the template, and synthesis is achieved through the method of adding sodium borohydride to restore silver nitrate. The preparation process is simple, easy to implement and environmentally friendly, and the preparation can be applied to the preparation of other luminous nano materials. In addition, new nano materials synthesized through the method have water solubility, a high quantum yield, light stability, good biocompatibility and other performance, and have potential wide application to the fields of biosensors, cell imaging, clinical medicine and the like.
Owner:YANCHENG INST OF TECH
Silver thiosulfate complex or silver-ammonia complex-containing hygroscopic silver-containing product and preparation method thereof
ActiveCN104083800ABroad spectrum antibacterialHigh antibacterial activityFibre treatmentTwo or more solvent application treatmentAdditive ingredientMoisture absorption
The invention relates to a silver thiosulfate complex or silver-ammonia complex-containing hygroscopic silver-containing product and a preparation method thereof. The invention discloses a hygroscopic silver-containing antibacterial product which comprises a silver thiosulfate complex or a silver-ammonia complex as an antibacterial ingredient, the silver thiosulfate complex or the silver-ammonia complex is evenly distributed and combined on the inner side and / or surface, the hygroscopic silver-containing antibacterial product comprises 0.01-10 wt% of silver, and the moisture absorption ability of the hygroscopic silver-containing antibacterial product is 6g / g and above. The invention also provides a preparation method of the hygroscopic silver-containing antibacterial product as well as a silver-containing antibacterial product dressing prepared from the hygroscopic silver-containing antibacterial product. The hygroscopic silver-containing antibacterial product has a very wide antibacterial spectrum, shows strong antibacterial activity to gram-negative bacteria and gram-positive bacteria, is rapid in effect, has light stability, and can be widely applied to chronic infections exudative wounds.
Owner:FOSHAN UNITED MEDICAL TECH
High-strength geogrid and preparation method thereof
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.
Owner:天鸿建设集团有限公司
Preparation method of multi-tone beet red pigment
The invention relates to a preparation method of a multi-tone beet red pigment, and the preparation method is characterized in that fresh red beet is adopted as a raw materials to be continuously produced through the procedures of washing, slicing, extraction, filtering, column chromatography, color protection, concentration, color matching, ultrafiltration, microcapsulization, atomizing drying and mixed treatment, a beet red pigment product is obtained by utilizing a method combining a staging elution process of macroporous resin with a particular model number, pure water with particular electric conductivity and the mixed antioxidant, the color value of the beet red pigment product is more than or equal to 80, color tones include orange red (b: 14 to 8), pink (b: 8 to 5), true red (b: 5 to 0) and amaranth (b: 0 to 10). The beet red pigment has characteristics of light resistance, heat resistance, stability and the like. The beet red pigment is better than similar product standard both at home and abroad.
Owner:JIANGXI DANXIA BIOTECHNOLOGY CO LTD
Micrometre level arachidonic acid emulsion and preparation thereof
ActiveCN101258929AImprove absorption and utilizationGood dispersionFood preparationStable stateAntioxidant
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.
Owner:湖北福星生物科技有限公司
Resveratrol composite membrane agent and preparation method thereof
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.
Owner:TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Cyclopentadiene-bridging dimeric perylene diimide compound and preparation method thereof
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.
Owner:SHANDONG NORMAL UNIV
Anti-fouling TPU protection film for car body
InactiveCN107629709AElasticPhotostableAntifouling/underwater paintsFilm/foil adhesivesTectorial membraneEngineering
The invention provides an anti-fouling TPU protection film for a car body. The anti-fouling TPU protection film comprises a TPU transparent film, a pressure-sensitive adhesive and an anti-sticking layer, wherein the surface of the TPU protection film contains an anti-fouling coating; the pressure-sensitive adhesive is an acrylate, polyurethane or organosilicon pressure-sensitive adhesive; and theanti-sticking layer is release paper or a PET release film. According to the invention, the aliphatic TPU film with low yellowing index is used as a basic film, and the surface tension of the film isimproved through solvent corrosion, so the adhesion of the anti-fouling coating on the surface of the film is improved; fluorocarbon-modified polyacrylate or organosilane-modified polyacrylate is usedas an anti-fouling component of the anti-fouling coating, so the coating has good self-cleaning performance, anti-fouling performance, transparency and compactness; and the film can be conveniently applied on the surface of the car body, can replace waxing, glaze sealing, paint spraying and the like of cars, and is also capable of improving the luster of the car body and protecting the car body from oil stains, water stains and scratches.
Owner:SHANGHAI NAR INDAL +1
Preparation method of jellyfish-shaped carbon nitride photocatalytic material with high specific surface area
InactiveCN107670682AIncrease response rateFast catalytic speedWater/sewage treatment by irradiationWater treatment compoundsCombustionRoom temperature
The invention discloses a preparation method of a jellyfish-shaped carbon nitride photocatalytic material with high specific surface area. The main preparation process is as follows: performing combustion on a raw material hydrocarbon in the air and enabling one part of the raw material hydrocarbon to be cracked to generate carbon black; performing stirring and ultrasonic treatment on a reaction mixture of melamine and polyacrylamide at room temperature, and transferring the reaction mixture into a drying oven to dry; putting the product into a muffle furnace, heating at 500 to 600 DEG C and at the heating rate of 20 DEG C / minute for 100 to 150 minutes, adding the obtained carbon black when the temperature is decreased to 300+ / -10 DEG C, mixing, stirring uniformly, and grinding by an agatemortar into uniform powder to obtain the novel jellyfish-shaped g-C3N4 photocatalytic material with high specific surface area. In the prepared jellyfish-shaped g-C3N4 photocatalytic material with high specific surface area, the specific surface area of the g-C3N4 is increased by 10 to 30 times, the carbon black can serve as an ultraviolet stabilizer due to the light stability, and the durabilityof the photocatalytic material is improved. The preparation method is cheap in raw material, simple in process and suitable for industrialized mass production.
Owner:CHANGAN UNIV
Novel silver-containing antibacterial product, and preparation method thereof
InactiveCN107158030ABroad spectrum antibacterialHigh antibacterial activityAntibacterial agentsInorganic active ingredientsAlcoholMoisture absorption
The invention relates to a novel silver-containing antibacterial product, and a preparation method thereof. The novel silver-containing antibacterial product contains a silver-containing alcohol amine chelate as an antibacterial component; the silver-containing alcohol amine chelate is uniformly distributed in, and is combined with the internal part and / or the surface of the novel silver-containing antibacterial product. The novel silver-containing antibacterial product contains, by weight, 0.01 to 10% of silver, and the moisture absorption capability of the novel silver-containing antibacterial product is higher than 6g / g. The invention also provides a preparation method of the novel silver-containing antibacterial product, and a silver-containing dressing prepared from the novel silver-containing antibacterial product. The antibacterial spectrum of the novel silver-containing antibacterial product is wide; the novel silver-containing antibacterial product possesses high antibacterial activity on Gram-negative bacteria and Gram-positive bacteria, and light stability; effect is achieved quickly; and the novel silver-containing antibacterial product can be widely used for chronic infective wounds.
Owner:FOSHAN UNITED MEDICAL TECH
Micrometre level arachidonic acid emulsion and preparation thereof
ActiveCN101258929BImprove absorption and utilizationGood dispersionFood preparationStable stateAntioxidant
Owner:湖北福星生物科技有限公司
Bright blue fluorescent protein, construction method thereof and application thereof in preparation of protein sun-screening agent
PendingCN111848767APH insensitivePhotostableCosmetic preparationsBacteriaSunscreen agentsFluorescence
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.
Owner:ZHEJIANG NORMAL UNIVERSITY
Gatifloxacin freeze-dried powder injection and preparing method thereof
ActiveCN100506214CSolve dissolveConvenient for clinical operationAntibacterial agentsOrganic active ingredientsFreeze-dryingComposite filter
The invention provides a gatifloxacin freeze-dried powder injection and a preparation method thereof. The method includes weighing the raw and auxiliary materials according to the formula and placing them in a sterile container, adding water for injection at a temperature of 70-80°C, keeping warm and stirring evenly, and then adding lactic acid solution, and mixing the raw and auxiliary materials to obtain a pH value of 4.0±0.5 after stirring solution; then add activated carbon for needles, stir evenly and let it stand, then filter for decarbonization to obtain the filtrate after decarbonization; dilute the decarbonized filtrate with water for injection to the configured amount, stir well and pass through 0.45 μm, 0.22 μm Composite microporous membrane filtration, the obtained filtrate is bottled and the gas outlet is reserved; the obtained filtrate in the bottle is freeze-dried: first pre-freeze at -40°C for 2-4 hours, and then freeze at -40°C ~ 10 Dry under reduced pressure and vacuum for 24-28 hours under the condition of ℃, and finally dry at 35 ℃ and high temperature for 6-8 hours.
Owner:SHANDONG LUOXIN PHARMA GRP CO LTD
Durable highway guardrail paint
InactiveCN104327561AGood acid and alkali resistanceImprove corrosion resistanceAnti-corrosive paintsHydration reactionAgricultural engineering
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.
Owner:QINGDAO ZHIGU INNOVATION TECH
Environment-friendly printing ink
InactiveCN111334116AUnclear solutionSolve the problem of containing toxic substancesInksNatural dyesProcess engineeringPrinting ink
The invention discloses an environment-friendly printing ink, which comprises the following raw materials by weight: 50-100 parts of natural pigment, 10-50 parts of linseed oil, 20-60 parts of water-soluble modified abietate resin, 30-80 parts of filler, 25-55 parts of an additive and 100-200 parts of water. The natural pigment is divided into red, yellow and blue colors, the red, yellow and blueraw materials are safflower, sophora flower and bluegrass respectively, and the preparation method comprises the following steps: raw material selection and cleaning, raw material cooking, raw material distillation, powder grinding, raw material mixing and ink packaging. The natural pigment is prepared through natural plant processing, compared with an existing pigment for ink, the pigment for inkis brighter in color, environmentally friendly and free of pollution, the problem that the existing pigment for printing ink is not bright in color or contains toxic substances is solved, and the printing ink has the anti-allergic characteristic and can be applied to printing of clothes.
Owner:吴永淇
Assistant composition used for polymer, and composite material
An assistant composition used for a polymer includes a triazine light absorbent, a component containing a polyisocyanate group, and a hindered amine component containing a reaction function group, and the reaction function group comprises at least one of a hydroxyl group, a mercapto group and an amino group. The assistant composition used for the polymer is added to the polymer in order to form a composite material having good light stability and being difficult to deteriorate.
Owner:FDC LEES CHEM IND
Low-cost low-temperature plastic dipping PVC glove forming process method
InactiveCN111592725ALow costHigh hardnessDomestic articlesCoatingsPolymer scienceIn situ polymerization
The invention belongs to the field of high polymer materials, and especially relates to a low-cost low-temperature plastic dipping PVC glove forming process method. The low-temperature plastic dippingPVC glove forming process method uses chloro-ether resin and allyl resin monomers, low-temperature plastic dipping of PVC gloves is realized through in-situ polymerization and synchronous crosslinking, the preparation cost is low, a hand mold does not need to be preheated, high temperature production environment is not needed, energy consumption is low, the production working environment and conditions are improved, the prepared PVC gloves are more durable, good in sealing performance, free of peculiar smell, large in elasticity, resistant to acids and alkalis, convenient and comfortable to wear, integrally formed, non-sticky, convenient and safe, free of natural latex allergic protein and free of anaphylactic reaction, and the strength, the corrosion resistance and the hygienic propertyare improved.
Owner:安徽攀望科技有限公司
High-efficiency dandruff-removing and itching-relieving shampoo and preparation method thereof
PendingCN112386508AGood antibacterial effectGrowth inhibitionCosmetic preparationsHair cosmeticsAntifungalMalassezia
The invention discloses high-efficiency dandruff-removing and itching-relieving shampoo and a preparation method thereof. Ketoconazole tablets, citric acid and kelp are used as raw materials; ketoconazole carbon dots and kelp carbon dots are synthesized in one step through a hydrothermal method; and the synthesized carbon dots and plant essential oil are compounded into a novel antifungal agent which is used for preparing dandruff-removing and itching-relieving shampoo. The antifungal agent in the shampoo has very excellent antibacterial property on malassezia; the antibacterial effect of theantifungal agent is superior to that of a positive control drug ketoconazole; furthermore, the antifungal agent has no drug resistance; and the prepared shampoo has obvious dandruff-removing and itching-relieving effects. The synthetic raw materials of the antifungal agent are easy to obtain; the synthetic method is simple, safe and effective; and the antifungal agent is a brand-new antifungal agent.
Owner:云南伦扬科技有限公司
Benzoic acid rare earth salt composite stabilizer for PVC and preparation method thereof
InactiveCN109206662ASolve the disadvantages of poor initial colorabilityImprove long-term stabilityCompound aBenzoic acid
The invention discloses a benzoic acid rare earth salt composite stabilizer for PVC and a preparation method thereof. The composite stabilizer is formed by compounding a main stabilizer and an auxiliary stabilizer. The main stabilizer is small-molecular-weight benzoic acid rare earth salt, and the auxiliary stabilizer comprises polyols and stearates. The composite stabilizer comprises the components in parts by weight: 1-8 parts of the small-molecular-weight benzoic acid rare earth salt, 1-4 parts of the polyols and 1-4 parts of the stearates. The problem of low initial anti-coloring ability of a single rare earth thermal stabilizer is solved, meanwhile, the excellent long-term stability of the rare earth thermal stabilizer is retained, and the complex of rare earth and a benzoic acid ligand has ultraviolet absorption performance, and the stabilizer also has light stability. The composite stabilizer has low toxicity and environmental protection, and meets the production requirements ofPVC industry at present.
Owner:INNER MONGOLIA UNIV OF SCI & TECH
Fluorescent probe for selectively detecting singlet oxygen in solution phase and application
InactiveCN111233905AChanges in fluorescence intensityRapid responseGroup 3/13 element organic compoundsFluorescence/phosphorescenceFluoProbesAnthracene
The invention relates to a fluorescent probe with enhanced fluorescence generation in the presence of singlet oxygen. The invention provides a fluorescent probe which can be used for selectively detecting singlet oxygen generated in various chemical reaction, photosensitization reaction and photocatalysis reaction systems in a solution phase. Fluorescent dye BODIPY with absorption and emission overlapped to a certain extent is adopted as a fluorescent parent, an anthracene functional group is introduced into the fluorescent parent to serve as an active center for selectively reacting with thesinglet oxygen, and alkynyl is innovatively connected with two groups, so that the fluorescence intensity is changed before and after the reaction with the singlet oxygen; and the ratio change of theabsorption intensity is generated by utilizing the change of the conjugated structure of the probe molecule before and after the reaction of the anthracene functional group and the singlet oxygen.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Photocatalyst fluorescent ink and preparation method thereof
ActiveCN113913049AImprove confidentialityPhotostableInksLight ActivityRadio frequency magnetron sputtering
The invention discloses photocatalyst fluorescent ink and a preparation method thereof, and relates to the technical field of ink. According to the invention, a self-made fluorescent agent is frozen into microspheres, and titanium dioxide is adsorbed on the surface of the self-made fluorescent agent by using plasma, electrostatic spraying and microwaves, so that the stability of the ink is improved; and then, through low-temperature plasma assisted radio frequency magnetron sputtering, cerium oxide is coordinated and chelated on the surfaces of the titanium dioxide microspheres, so that the visible light activity of titanium dioxide is improved, and ink can be catalytically degraded under visible light. The self-made fluorescent agent is prepared from veratone, pyrenecarboxaldehyde and boron trifluoride, so that the ink can display patterns only under infrared wavelength irradiation, is not easy to decompose by illumination under long-time infrared irradiation, and has better light stability. The photocatalyst fluorescent ink prepared by the invention has the effects of good confidentiality, light stability and degradability.
Owner:河南京硕信息科技有限公司
Degradable photoresponse polymer and preparation method thereof
The invention discloses a degradable and photoresponsive polymer. The molecular formula of the degradable and photoresponsive polymer is shown in the specification, the polymer prepared by the invention has photoresponse degradation capability, and mainly has o-nitrobenzyl, so that the polymer has light instability, and a thioacetal group in the molecular formula of the polymer is also cleavable, so that the polymer has better photoresponse capability and degradation capability.
Owner:WENZHOU MEDICAL UNIV +1
A steganographic material and steganographic method based on surface-enhanced Raman nanoparticles
Owner:SHANGHAI JIAOTONG UNIV
Preparation method of titaniferous composition with light stability
Owner:CHINA PETROLEUM & CHEM CORP +1
A kind of nitrogen-containing heterocyclic rare earth stabilizer
ActiveCN113061290BReduce processing temperatureTermination of degradationOrganic chemistryAliphatic amineEthyl ester
The invention belongs to the field of PVC processing aids. The invention relates to a nitrogen-containing heterocyclic rare earth stabilizer. The method uses ethyl 1H-pyrrole-2,3,4,5-tetracarboxylate, aliphatic amines, and lanthanides as raw materials, and undergoes multiple steps such as substitution and esterification. The reaction obtains a nitrogen-containing heterocyclic rare earth stabilizer material. The new nitrogen-heterocyclic rare earth stabilizer not only effectively solves the problem of unsatisfactory thermal stability of commonly used PVC rare earth stabilizers, but also has high-efficiency thermal stability, light stability, lubrication and other properties, and can also be compounded with other thermal stabilizers The material can be widely used in various PVC products.
Owner:常州佑佳新材料科技有限公司
Method for preparing composite wood and composite wood
A method for preparing composite wood comprises the following steps: a polymer and an additive composite are mixed to form a mixture, wherein the additive composite comprises a component with a polyisocyanate group and a hindered amine component with a reaction functional group, and the reaction functional group in the hindered amine component with the reaction functional group comprises at least one of the following groups as follows: hydroxyl, a thiol group and amino; the component with the polyisocyanate group and the hindered amine component with the reaction functional group in the mixture are subjected to an addition reaction.
Owner:FDC LEES CHEM IND
A kind of resveratrol composite membrane agent and preparation method thereof
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.
Owner:TIANJIN UNIV OF SCI & TECH
Preparation method of multi-tone beet red pigment
The invention relates to a preparation method of a multi-tone beet red pigment, and the preparation method is characterized in that fresh red beet is adopted as a raw materials to be continuously produced through the procedures of washing, slicing, extraction, filtering, column chromatography, color protection, concentration, color matching, ultrafiltration, microcapsulization, atomizing drying and mixed treatment, a beet red pigment product is obtained by utilizing a method combining a staging elution process of macroporous resin with a particular model number, pure water with particular electric conductivity and the mixed antioxidant, the color value of the beet red pigment product is more than or equal to 80, color tones include orange red (b: 14 to 8), pink (b: 8 to 5), true red (b: 5 to 0) and amaranth (b: 0 to 10). The beet red pigment has characteristics of light resistance, heat resistance, stability and the like. The beet red pigment is better than similar product standard both at home and abroad.
Owner:JIANGXI DANXIA BIOTECHNOLOGY CO LTD
High-strength geogrid and its preparation method
Owner:天鸿建设集团有限公司
A cyclopentadiene bridged bisperylene diimide compound and its preparation method
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.
Owner:SHANDONG NORMAL UNIV
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