39results about How to "Obvious absorption peak" patented technology

The invention discloses an intelligent ultraviolet gas analyzer. The intelligent ultraviolet gas analyzer consists of an ultraviolet light source, a narrow-band interference filter, a measurement gas chamber, a photoelectric detector at a reference side and a photoelectric detector at a measurement side. A side edge of an outlet of the ultraviolet light source is provided with a rotatable light sectioning wheel, and two ends of the light sectioning wheel are respectively provided with a gas light filter which can be alternately placed at the outlet of the ultraviolet light source by rotation of the light sectioning wheel and uviol. The intelligent ultraviolet gas analyzer can accurately measure contents of SO2, NOx and H2S which are main flue gas in real time, achieves lower measurement range of 0-100PPm, higher sensitivity and better stability, and has service life of 8-10 years.

Disclosed are a metallic silver filled photonic crystal optical fiber capable of spontaneously generating SPR effect and a preparation method thereof, and belongs to the technical field of optical fiber intelligent communication. The optical fiber comprises a fiber core and a cladding, the fiber core is a solid quartz glass rod, the cladding comprises a quartz glass capillary tube, an air hole, and a silver wire, a multilayer quartz glass capillary tubes are arranged around the longitudinal direction of the fiber core, and a silver wire is arranged at the air hole of one quartz glass capillarytube in the second layer quartz glass capillary tube. The preparation method is as follows: according to the design structure, the arrangement structure, and the drawing optical fiber, the prepared optical fiber can spontaneously generate the SPR effect. The method can prepare the photonic crystal optical fiber capable of spontaneously generating SPR effect of different air hole structures and sizes, no need to subsequently coat or fill the optical fiber, and the resonance peak position can be adjusted by adjusting the diameter of the air hole, filling the diameter of the silver wire and theouter diameter of the capillary tube, the performance is good, meanwhile the method has the advantages of simple structure, convenience in preparation, adjustable adjustment and the like, and can be applied to the manufacturing of various optical components.

The invention relates to a circulation dyeing method for dye wastewater, belonging to the technical field of treatment of fabrics and the like. The method comprises the following steps: regulating the pH value of the dye wastewater to be 7-7.5, adding 0.1-5g / L of cationic decoloring agent, stirring for 1-5 minutes, and precipitating and decolorizing; taking the supernatant, regulating the salinity, and supplementing new dyes for dyeing. The method disclosed by the invention is applied to dyeing with reactive dyes and has the advantages that the flow is short, the method is simple, discharge amount of the wastewater is greatly reduced, the utilization rate of water and inorganic salts is improved, and the like.

The invention discloses a preparation method of a polyvinyl alcohol composite film with embedded silver-wrapped nanoparticles, comprising the following steps: (1) preparing a polyvinyl alcohol-silver nitrate solution; (2)preparing a polyvinyl alcohol-silver nitrate film by using spin coating method or casting film method; and (3) irradiating the polyvinyl alcohol-silver nitrate film with ultraviolet light. The prepared composite film has the characteristics of uniform metal nanoparticle size distribution, controllable dimension, uniform shape, and uniform dispersion.

The invention discloses an SERS (surface enhanced Raman scattering) device, as well as a preparing method and application thereof. The device comprises a capillary tube with a mixing colloid and an active substrate both arranged therein, wherein the mixing colloid consists of poly-(N-isopropyl acrylamide), gold nanorods and water with the weight ratio of (1.8-2.2):(0.001-0.003):(100); the active substrate adopts the structure that tapered zinc oxide nanorods with silver nanoparticles modified surfaces are stood on the surface of a heating wire. The method includes the following steps: adding ammonia water in a zinc nitrate hexahydrate solution, and obtaining an electric precipitating solution after the ammonia water is completely dissolved; using the heating wire as a cathode and placing the heating wire in the solution for electric precipitation, so as to obtain the heating wire with tapered nanorods stood on the surface; then immersing the heating wire with the tapered nanorods stood on the surface in a silver nitrate solution and irradiating the heating wire by ultraviolet light, so as to obtain an active substrate; then placing the active substrate and the mixing colloid in the capillary tube, so as to prepare the target product. According to the invention, the SERS device can be widely applied in real-time detection of pollutants in water solutions in environmental, chemical, biological fields and the like.

The invention provides dronedarone or powder of a pharmaceutically acceptable salt thereof and a pharmaceutical composition prepared therefrom. The pharmaceutical composition is prepared by the steps of: dispersing dronedarone or a salt thereof, and more than one compound selected from phospholipid, or phospholipid and a water-soluble auxiliary material and a surfactant into an organic solvent; and removing the solvent by using a spray drying method or a drying method under reduced pressure. The obtained dronedarone or the powder of the pharmaceutically acceptable salt thereof and the pharmaceutical composition prepared therefrom have excellent dissolvability in a medium with the pH value of about 7, thus the bioavailability of a medicine is effectively guaranteed.

Disclosed is a method of extracting and detecting mogrosides IV and V from momordica grosvenori of 55 days in fruiting age. The method includes: adopting a 60% alcohol water solution added with ultrasonic assisted extraction, using Ca(OH)2 to flocculate, filter, concentrate and recycle alcohol; adopting D101 macroporous resin for separation and purification: when pH is 9.0, using flowing speed of twice column volume per hour for column chromatography, sequentially using pure water and 20% alcohol for cleaning, and using 60% alcohol for elution; collecting 60% alcohol eluant, depressurizing for concentration, and drying; using HPLC (high performance liquid chromatography) for detection, wherein chromatographic column conditions include that a chromatographic column is C18 column, a ratio of acetonitrile to water solution is 21:79, detection wavelength is 203nm, flowing speed is 1 mL / min, column temperature is 25 DEG C, feeding amount is 10uL, and column chromatography is performed for 30 min. During detection, absorbing peaks of the mogrosides IV and V are obvious, content of the mogroside IV is greater than 5.0% while that of the mogroside V is greater than 15.0%, synchronous extraction and detection of the mogrosides IV and V are realized, and the method is of industrial significance.

The invention discloses a medical stone sulfenyl repairing agent for treating soil mercury pollution and a preparation method thereof. The medical stone sulfenyl repairing agent is a composite repairing agent material obtained by modifying medical stone obtained after acid activation treatment through a sulfenyl-containing complex; the medical stone sulfenyl repairing agent is prepared from, by weight, 10-12 parts of medicine stone and 11-14 parts of a sulfenyl complex. The medical stone sulfenyl repairing agent has the advantages that the remarkable repairing effect on mercury polluted soil is achieved, the concentration of mercury in rice can be effectively lowered, the technological flow process is simple and reliable, the cost is low, use is safe, no secondary contamination is caused,the medical stone sulfenyl repairing agent is of a great actual and economic significance in mercury polluted soil repairing, and the repairing agent meets the national agricultural sustainable requirement.

The invention provides a method for determining oil mist in workshop air by a non-dispersive infrared process, which comprises the following steps: collecting oil mist in workshop air, transferring the collected sample into a color comparison tube, adding a solvent incapable of absorbing infrared radiation to carry out extraction, determining the extracting solution by a non-dispersive infrared process, recording the absorbance at the wavelength of 3.400 mu m in the infrared spectrum, and acquiring the content of oil mist according to an external standard method. The method provided by the invention has the advantages of high accuracy, high speed, small interference and high sensitivity, and the precision and accuracy are respectively less than 5%, thereby satisfying the demands of people for detection work and research. The invention fills up the blank of the method for determining oil mist in workshop air by a non-dispersive infrared process.

The invention discloses a moisturizing sunscreen composition and application thereof. The moisturizing sunscreen composition contains a herba dendrobii extract, a limnanthes alba seed oil, an anthemisnobilis extract, a herba selaginellae extract and an echinacea purpurea extract, wherein a mass ratio of the herba dendrobii extract, the limnanthes alba seed oil, the anthemis nobilis extract, the herba selaginellae extract and the echinacea purpurea extract is (15 to 30) to (10 to 20) to (5 to 10) to (10 to 20) to (10 to 20). The herba dendrobii extract has moisturizing effects of activating cells, tightening skin, preventing loss of moisture and supplementing moisture. According to the moisturizing sunscreen composition disclosed by the invention, the limnanthes alba seed oil, the anthemisnobilis extract, the herba selaginellae extract and the echinacea purpurea extract, having moisturizing and sunscreen functions, are added at the same time and are compounded with the herba dendrobiiextract so as to play a synergistic collaboration role in moisturizing and sunscreen; at a certain range mass proportion of a variety of plant extracts, the synergistic effect is produced, so that the product has moisturizing effects of obviously improving the skin quality, improving the elasticity of the skin and supplementing moisture, and the effect of the product is obviously higher than theeffect of one or more extracts which are separately added.

The invention mainly aims to provide a compound selectively recognizing mercury ions and a preparation method and application thereof. The preparation method includes following steps: 1), providing a first solution which contains a rhodamine compound dispersed in a first solvent; 2), heating the first solution, and mixing the first solution with a hydrazine hydrate solution for reaction to obtain rhodamine hydrazide; 3), providing a second solution which contains rhodamine hydrazide dispersed in a second solvent; 4), heating the second solution, mixing the second solution with a Lawson reagent, reacting in an inertial gas atmosphere, and separating out sulfur hydrazide; 5), providing a third solution which contains sulfur hydrazide dispersed in a third solvent; 6), heating the third solution, mixing the third solution with terephthalaldehyde, reacting under catalysis of glacial acetic acid and in inertial gas, and filtering to obtain a product. The synthesis process is free of byproduct generation, and the compound is simple in purifying operation and has good selective recognition effect on Hg2+.

The invention relate to a carbon-copper double-doped sapphire crystal and a preparing method thereof. The chemical formula of the crystal can be expressed as Cx(CuO)y(Al2O3)1-x-y, wherein 0.01wt%<=x<=1wt%, 0.01wt%<=y<=0.5 wt%, and x and y represents weight percentages. A melt method is adopted in growth of the carbon-copper double-doped sapphire crystal. The carbon-copper double-doped sapphire crystal can emit various kinds of colored light within the range from near-infrared waveband to the purple light waveband under the action of ultraviolet band pumping light. The crystal can be used for the fields of thermoluminescence dose detection, colour-center lasers outputting laser (continuous laser, pulse laser and tuning laser) within the range from near-infrared waveband to the purple light waveband and light-emitting display of corresponding wavebands.

The invention discloses a manufacturing method of environment-friendly five-layer plywood and belongs to the technical field of wood processing. The method comprises the following steps of veneer drying, blank grouping treatment, hot-pressing treatment, cold-pressing treatment, edge cutting and polishing, wherein in the step of blank grouping treatment, veneers subjected to drying treatment are subjected to blank grouping, and every five veneers serve as a group; the five veneers is combined into a five-layer plate blank from bottom to top; every two adjacent veneers are bonded through a special adhesive; the special adhesive comprises, by weight, 50-60 parts of modified phenolic glue, 20-30 parts of casein-soybean glue, 8-12 parts of sodium hydroxide, 4-8 parts of anti-enzyme agent, 4-8 parts of fire retardant and 15-20 parts of filling agent. Through the manufacturing method, the problem that existing five-layer plywood release a great deal of formaldehyde is solved.

The invention discloses a novel photocatalytic sensitizer and a preparation method thereof. The preparation method comprises the steps of: preparing amino cobalt phthalocyanine with chitosan as a base material; modifying and subjecting the amino cobalt phthalocyanine to grafting reaction with the chitosan by adopting a heterogeneous manner to obtain nitro phthalocyanine firstly, and then obtain amino phthalocyanine; modifying the phthalocyanine with maleic anhydride; and finally, subjecting the modified phthalocyanine to grafting reaction with the chitosan to obtain a novel catalyst of chitosan grafted butadiene acid acylamino cobalt phthalocyanine. In comparison with the traditional inorganic sensitizer, the novel photocatalytic sensitizer prepared by the invention has the advantages of capabilities of being degraded biologically and used repeatedly, stable nature and low cost.

The invention discloses an intelligent ultraviolet gas analyzer. The intelligent ultraviolet gas analyzer consists of an ultraviolet light source, a narrow-band interference filter, a measurement gas chamber, a photoelectric detector at a reference side and a photoelectric detector at a measurement side. A side edge of an outlet of the ultraviolet light source is provided with a rotatable light sectioning wheel, and two ends of the light sectioning wheel are respectively provided with a gas light filter which can be alternately placed at the outlet of the ultraviolet light source by rotation of the light sectioning wheel and uviol. The intelligent ultraviolet gas analyzer can accurately measure contents of SO2, NOx and H2S which are main flue gas in real time, achieves lower measurement range of 0-100PPm, higher sensitivity and better stability, and has service life of 8-10 years.

The invention relates to barium magnesium niobate light-emitting ceramics and a preparation method thereof.The formula of the barium magnesium niobate light-emitting ceramics is Ba(1-x)Smx(Sn0.1Mg0.3Mg0.3Nb0.6)O3, wherein 0.005< / =x< / =0.03.The preparation method includes the steps of firstly, performing ball milling on a barium-source compound, a samarium-source compound, a magnesium-source compound, a tin-source compound and a niobium-source compound according to the weight requirements of the formula, then sintering under 1300-1350 DEG C to obtain products, and performing secondary ball milling on the products to obtain ceramic powder; secondly, adding a polyvinyl alcohol aqueous solution into the ceramic powder for pelleting, aging, crushing to obtain ceramic particles, forming the ceramic particles to obtain ceramic bodies, and preparing the ceramic bodies into even-pressure ceramic bodies through isostatic cool pressing; thirdly, sintering the even-pressure ceramic bodies under oxygen atmosphere after the even-pressure ceramic bodies discharge glue, cooling along with a furnace, and coarsely polishing and finely polishing to obtain the barium magnesium niobate light-emitting ceramics, wherein sintering temperature is 1500-1600 DEG C, and the temperature is kept for 48-60 hours.The barium magnesium niobate light-emitting ceramics have the advantages that the crystal boundary of the ceramics has no impurity phases, and the ceramics are good in compactness, even in grain size, high in chemical stability, and good in physical performances such as compressive strength; the ceramics have evident absorption peak in the visible light range, the quenching concentration can reach 2%mol, and high light-emitting intensity is achieved.

The invention relates to a near-infrared spectrum detection method for the sucrose content of soybean seeds. The method is characterized in that the method comprises the following steps: combining natural and artificially added sucrose soybean samples to form a calibration sample set; collecting spectral data by utilizing a near infrared spectrum analyzer; and constructing a near-infrared spectrumquantitative analysis and prediction model of the sucrose content of the soybean seeds by using enzymatic colorimetric method chemical value determination, spectral data preprocessing and a partial least squares regression statistical method, and detecting the sucrose content of an unknown soybean seed sample by using the near-infrared spectrum mathematical model. The near-infrared spectrum detection method established by the invention is relatively strong in prediction capability and relatively good in applicability; the method can be effectively applied to accurate measurement of the sucrose content of the soybean seeds, can provide data support for rapid measurement of sucrose indexes of raw material soybeans and timely adjustment of production process parameters or raw material proportions of soybean products, and can also meet the requirements of rapid and accurate identification of new high-sucrose soybean breeding lines.

The invention discloses a manufacturing method of an environmentally-friendly three-ply board, and belongs to the technical field of wood processing. The method comprises the following steps of singleboard drying, blank forming processing, thermal pressing, cold pressing, edge cutting and polishing, wherein a single board comprises a middle core board, a front surface board and a rear surface board; during blank forming processing, the front surface and the rear surface of the middle core board are coated with special adhesive, and the front surface board and the rear surface board are correspondingly adhered to the front surface and the rear surface of the middle core board so as to obtain a board blank; the special adhesive is prepared through the following raw materials including, byweight, 50-60 parts of phenol glue, 20-30 parts of casein-soybean glue, 20-30 parts of polyvinyl alcohol, 4-6 parts of starch, 1-2 parts of borax, 5-8 parts of sodium hydroxide, and 20-30 parts of talcum powder. With the adoption of the method, the problem that an existing three-ply board releases a large amount of formaldehyde can be solved.

The invention relates to a method for detecting high-concentration copper ions by spectrophotometry, which comprises the following steps: adding an imidazole or substituted imidazole solution into a water body containing copper ions, uniformly mixing and standing to obtain a sample solution to be detected, and directly measuring the concentration of the copper ions by spectrophotometry according to the absorbance of the sample solution to be detected, the detection method provided by the invention realizes rapid, timely and sensitive detection of copper ions in a solution, the detection is accurate, the sensitivity is high, the operation is simple, the imidazole-copper ion complex has an obvious absorption peak at 610nm, the linear response interval of the peak is relatively large, UV spectral lines before and after coordination are not overlapped, and the detection result is accurate. After imidazole and copper ions are coordinated, the absorbance and the concentration are both in a linear relationship, and R2gt; the linear relation of a standard curve is good, and the method is suitable for quantitative measurement in a relatively large copper ion concentration range.

The invention relates to a preparation method of an environment-friendly three-ply board, and belongs to the technical field of wood processing. According to the preparation method of the environment-friendly three-ply board, the use amount of phenolic glue is reduced, so that the release amount of formaldehyde is reduced, and a plurality of kinds of glue cooperate with one another, so that the environmental friendliness, the gluing property, the water resistance, the impact resistance and the like of special glue are improved. The phenolic glue has the advantages of good adhesion to wood, high bonding strength, high heat resistance, good creep resistance, ablation resistance, good dimensional stability and the like, but also has the disadvantages of high formaldehyde content, large brittleness, low peel strength and low impact resistance; soybean protein glue is a kind of novel green environment-friendly glue and does not contain formaldehyde; and the soybean protein glue is a renewable resource, the residue of soybean processing is effectively utilized, resources are comprehensively utilized, and the production cost is saved.

The invention discloses a [CuCN] crystal material and a preparation method thereof, and relates to a crystal material and a preparation method thereof. The problems that a [CuCN] coordination polymerstructure prepared from an existing aqueous solution is difficult to design directionally, the preparation process is complex, and the yield is low are solved. The formula of the [CuCN] crystal material is {[Cu(CN)2(2, 2'-bipy)][Cu2(CN)Cl], belongs to a monoclinic system, the space group is C2 / c, alpha is 90 degrees, beta is 90 degrees, gamma is 90 degrees, and Z is 2. The preparation method comprises the following steps of: adding CuCl2.2H2O into a solvent, then adding K4Fe(CN)6.3H2O to obtain a reaction system, adding KF into the reaction system, adding 2, 2'-dipyridyl, adjusting the pH value to obtain a reaction solution, and finally conducting crystallizing, cooling, cleaning and drying to obtain the [CuCN] crystal material.

The invention relates to barium magnesium niobate light-emitting ceramics and a preparation method thereof.The formula of the barium magnesium niobate light-emitting ceramics is Ba(1-x)Smx(Sn0.1Mg0.3Mg0.3Nb0.6)O3, wherein 0.005< / =x< / =0.03.The preparation method includes the steps of firstly, performing ball milling on a barium-source compound, a samarium-source compound, a magnesium-source compound, a tin-source compound and a niobium-source compound according to the weight requirements of the formula, then sintering under 1300-1350 DEG C to obtain products, and performing secondary ball milling on the products to obtain ceramic powder; secondly, adding a polyvinyl alcohol aqueous solution into the ceramic powder for pelleting, aging, crushing to obtain ceramic particles, forming the ceramic particles to obtain ceramic bodies, and preparing the ceramic bodies into even-pressure ceramic bodies through isostatic cool pressing; thirdly, sintering the even-pressure ceramic bodies under oxygen atmosphere after the even-pressure ceramic bodies discharge glue, cooling along with a furnace, and coarsely polishing and finely polishing to obtain the barium magnesium niobate light-emitting ceramics, wherein sintering temperature is 1500-1600 DEG C, and the temperature is kept for 48-60 hours.The barium magnesium niobate light-emitting ceramics have the advantages that the crystal boundary of the ceramics has no impurity phases, and the ceramics are good in compactness, even in grain size, high in chemical stability, and good in physical performances such as compressive strength; the ceramics have evident absorption peak in the visible light range, the quenching concentration can reach 2%mol, and high light-emitting intensity is achieved.

The invention relates to preparation and application of a solid-state fluorescent probe for detecting carbon monoxide (CO), the structural formula of the fluorescent probe is shown in the specification. The invention provides a preparation method for synthesizing the solid-state fluorescent probe by taking 3-(7-chloro-4-oxo-3, 4-dihydroquinazoline)-4-hydroxybenzaldehyde, 1-ethyl-2-methylquinoline, allyl chloroformate and the like as raw materials. Firstly, the solid-state fluorescent probe is relatively long in wavelength, emits strong fluorescence at 650nm, is insoluble in water and has anti-diffusion capability; secondly, the fluorescent probe shows very high sensitivity to CO, and fluorescence is remarkably enhanced after the probe reacts with CO; moreover, the solid-state fluorescent probe shows very high selectivity on CO, and is not interfered by other active oxygen, active nitrogen, active sulfur, biological mercaptan and common ions; in addition, the solid-state fluorescent probe can quickly act with CO, and the response time is within 100s; and finally, the solid-state fluorescent probe is applied to detection of the content of carbon monoxide in living cells and can be used for fluorescence imaging of CO.

The invention discloses a preparation method of a polyvinyl alcohol composite film with embedded silver-wrapped nanoparticles, comprising the following steps: (1) preparing a polyvinyl alcohol-silver nitrate solution; (2)preparing a polyvinyl alcohol-silver nitrate film by using spin coating method or casting film method; and (3) irradiating the polyvinyl alcohol-silver nitrate film with ultraviolet light. The prepared composite film has the characteristics of uniform metal nanoparticle size distribution, controllable dimension, uniform shape, and uniform dispersion.

The invention relates to the technical field of compounds, in particular to a modified nano particle as well as a preparation method and application thereof. The modified nano particle comprise an inorganic nano particle, and a poly-o-phenylenediamine layer coating the surface of the inorganic nano particle. The applicant creatively discovers that the modified nano particle can catalyze the reaction of oxygen and water under a neutral condition (pH value is 7.0) to generate hydrogen peroxide; and a substrate TMB (3, 3 ', 5, 5'-tetramethyl benzidine) can be oxidized, so that an obvious absorption peak is generated at the 658 nm position of the ultraviolet-visible spectrum, and the unique oxidation-reduction type nano-enzyme catalytic activity is provided;.

A metal silver-filled photonic crystal optical fiber that spontaneously generates SPR effect and a manufacturing method thereof belong to the field of optical fiber intelligent communication technology. The optical fiber includes a core and a cladding. The core is a solid quartz glass rod. The cladding includes quartz glass capillaries, air holes and silver wires. There are multiple layers of quartz glass capillaries arranged around the longitudinal direction of the fiber core. On the second layer Among the quartz glass capillary tubes, a silver wire is provided in the pore of one of the quartz glass capillary tubes. The manufacturing method is: designing the structure, arranging the structure and drawing the optical fiber. The obtained optical fiber can spontaneously produce the SPR effect. This method can produce photonic crystal fibers with different air hole structures and sizes that spontaneously produce the SPR effect without the need for subsequent coating or filling of the fiber. The resonance peak can be adjusted by adjusting the diameter of the air hole, the diameter of the filling silver wire, and the outer diameter of the capillary tube. The position is adjustable, the performance is good, and it also has the advantages of simple structure, convenient preparation, and adjustability, and can be used in the production of a variety of optical components.