45results about How to "Does not cause degradation" patented technology

The invention provides a plastic product and a preparation method thereof. The method comprises the following steps: 1) forming a plastic base, wherein the plastic base contains chemically plated catalysts which are compounds shown in the formula I, II or III; 2) removing the plastics in the selected area on the surface of the plastic base and exposing the chemically plated catalysts in the corresponding area; and 3) chemically plating copper or nickel and continuing chemical plating and / or electroplating at least once to form a metal layer on the surface of the plastic base. The preparation method provided by the invention has the advantages of simple process, low requirement for energy and low cost. In addition, the chemically plated catalysts are distributed in the plastic base, so the plating layer formed after chemical plating and the plastic base have very high adhesion.

There is provided a color display unit having a wide range of color reproduction and low power consumption, with a simple structure, and without causing element deterioration. The display unit comprises light source means for generating blue light, a color conversion layer having a red color region for converting the blue light generated by the light source means to red light, a green color region for converting the blue light to green light, and a blue color region for transmitting the blue light as is, arranged on a flat surface, and a pixel switch structure for turning the blue light ON or OFF for each of the red color region, green color region and blue color region in response to an image signal.

The invention provides a plastic product and a preparation method thereof. The method comprises the following steps: 1) forming a plastic base, wherein the plastic base is a thermoplastic or thermosetting plastic containing chemically plated catalyst precursors which are uniformly distributed in the thermoplastic or thermosetting plastic; and the chemically plated catalyst precursors are one or more of nitrides, borides or phosphides of copper, iron and zinc, nitrides of tin and borides or phosphides of nickel; 2) using laser needles to irradiate the selected area on the surface of the plastic base, gasifying the surface plastics in the corresponding areas and decomposing the exposed chemically plated catalyst precursors to obtain a chemically plated catalyst; and 3) chemically plating copper on the surfaces of the chemically plated catalyst obtained in the step 2) and continuing chemical plating and / or electroplating at least once to form a metal layer on the surface of the plastic base. The preparation method provided by the invention has the advantages of simple process, low requirement for energy and low cost. In addition, the chemically plated catalyst precursors are distributed in the plastic base, so the plating layer formed after chemical plating and the plastic base have very high adhesion.

The invention relates to a grafted solid acid catalyst. A preparation method of the grafted solid acid catalyst comprises the following steps: taking lignocelluloses biomass carbon-based material as a raw material, taking a sulfonating agent as an active molecule, and carrying out carbonization reaction for 1-36 hours at the temperature of 120-240 DEG C, wherein the mass ratio of the raw material and the sulfonating agent is 1 / 10-10; standing black solid obtained by carbonization at high temperature, drying to obtain black solid which is a rough carbon-based solid acid catalyst; and mixing the rough carbon-based solid acid catalyst with an oxidizing agent according to the solid-liquid ratio of 1 / 10-0-1 / 10, reacting for 0.5-3 hours at the temperature of 50-60 DEG C, after reaction, filtering and separating to obtain black solid, and washing and drying the black solid to obtain the grafted carbon-based solid acid catalyst. Cellulose-based glucose is used as the raw material of the catalyst, the structural characteristics of the raw material are similar to the structural characteristics of the raw material of lignocelluloses biomass, therefore, catalyzing effect is excellent, and the catalyzing effect of the grafted solid acid catalyst is similar to the catalyzing effect of liquid acid.

The invention provides a preparation method of a plastic product and a plastic product. The method comprises steps of: 1) moulding a plastic matrix containing a chemical plating catalyst compound with a formula III; 2) removing plastic on a selected zone of the plastic matrix and exposing the chemical plating catalyst on a corresponding zone; 3) carrying out chemical copper facing or chemical nickel plating, continuing to carry out at least one time of chemical plating and / or electroplate to form a metal level on the plastic matrix surface. The preparation method provided by the invention has simple technology, low energy demand and low cost; besides, the chemical plating catalyst is distributed into the plastic matrix, so the coating formed after chemical plating has quite high bondingforce with the plastic matrix.

This invention involves unsaturated cyclic aliphatic carbonate monomer and polymer synthesis and uses, and is biomedical polymer materials. From 2,2 - dimethylolpropionic acid departing, to synthesize 2-methyl-2-allyl-oxygen carbonyl trimethylene carbonate and 2-methyl-2-propargyl oxygen carbonyl trimethylene carbonate, and then through ring-opening polymerization or aliphatic monomers cycloate monomer opening loop and copolymerization, gain copolymer of aliphatic polycarbonate or aliphatic polyester-carbonate that side group contains double and Triple bond. Such polymer has advantage of both aliphatic polyester and carbonate, is biodegradable, degradation products is non-toxic. Use the functional side group of Double and Triple bond can connect drugs, active peptides or other bioactive elements with the polymer, improving the biocompatibility and biological activity of polymer, which may has real application in controlled-release drug, polymer pro-drug and tissue engineering fields.

The invention discloses a treatment method of a riboflavin fermentation liquid, and belongs to the technical field of riboflavin production. The method comprises the following steps of carrying out solid-liquid separation on the riboflavin fermentation liquid by adopting a centrifugal mode to obtain wastewater containing 500-800ppm of riboflavin and 2-3wt% of thallus; adjusting the pH value of the wastewater obtained through solid-liquid separation to be 8-9, adding an anionic flocculant which is 0.005-0.01% of weight of the wastewater, stirring, dissolving, standing and precipitating, discharging a supernatant liquid to obtain a fermented bacterial concentrated solution; adjusting the pH value of the fermented bacterial concentrated solution obtained through precipitating and separation to be 5-7 and carrying out inner dehydration by adopting a stirring mode; carrying out filter pressing on the liquid obtained through inner dehydration under relatively low feed pressure and carrying out high-pressure squeezing under relatively high squeezing pressure after filter pressing is completed; and drying a filter cake obtained through high-pressure squeezing to obtain a by-product rich in an organic matter.

The invention discloses a method for removing lignin from a biomass raw material. The method comprises the step of placing the biomass raw material into alkaline electrolyzed functional water to perform a continuous hydrolysis reaction so as to remove the lignin, one of the three components in the biomass raw material, to obtain cellulose and hemicellulose so as to contribute to the later enzymolysis and fermentation. The alkaline electrolyzed functional water is applied to a biomass pretreatment technique; and compared with the method using the traditional media such as aqueous alkali and the like, the method for removing the lignin from the biomass raw material by using the alkaline electrolyzed functional water has the advantages of: (1) simple preparation, no toxicity, no harm and low price; (2) basically no negative influence on environments, no wastes, no waste liquid and green production process; and (3) no negative influences, such as corrosion, damage and the like, on stainless steel pretreatment equipment. By the method of the invention, the removing rate of the lignin from the biomass raw material is up to 90 percent.

The invention provides a method for producing a plastic product and the plastic product. The production method comprises the following steps: 1) forming a plastic substrate, wherein the plastic substrate comprises a chemical plating enhancer which is one or more selected from Ni2O3, Co2O3, CuSiO3, CuC2O4, Cu / Fe / Mn or Cu / Fe / Al ternary co-sintering oxide, Cu / Fe / Al / Mn quaternary co-sintering oxide; 2) laser gasificating the surface of the plastic substrate, exposing the chemical plating enhancer; 3) performing chemical copper plating or chemical nickel plating, continuously carrying out a chemical plating and / or electroplating, forming a metal layer on the surface of the plastic substrate. The method of the invention has the advantages of simple process, low energy requirement and low cost; in addition, the chemical plating enhancer is distributed in the plastic substrate, thereby a plating layer formed by chemical plating has high binding force with the plastic substrate.

The invention relates to a riboflavin-containing solid preparation. The riboflavin-containing solid preparation comprises, by weight, 23.0-65.0% of riboflavin, 18.0-65.0% of a diluent, 0.25-7.5% of a disintegrating agent, 0.1-5.5% of a binder and 0.5-2.0% of a lubricant. The riboflavin comprises spherical crystals with sizes of 25-35 micrometers and has purity greater than 98%. The riboflavin has the advantages of high purity, good processing performances and good fluidity. The solid preparation has a fast disintegrating rate and good stability.

The invention relates to the technical field of chemical evaporation heating equipment, and provides a falling-film evaporator for preparing spices. The falling-film evaporator comprises an evaporation chamber, wherein a heat exchange tube bundle is arranged in the evaporation chamber; a gas-liquid separator is arranged at the lower part of the evaporation chamber. The falling-film evaporator is characterized in that a steam inlet, a condensate water and a condenser are arranged on the evaporation chamber; a material inlet is formed in the top part of the evaporation chamber; a material distributor is arranged at the lower part of the material inlet; the gas-liquid separator is connected with a separation chamber through two pipes which are parallel from top to bottom; a secondary steam outlet is formed in the top part of the separation chamber and is connected with a compressor; the compressor is connected with the two pipes; one pipe is connected with the steam inlet; and the other pipe is connected with a material inlet pipe. To-be-heated materials are preheated by the compressor and a secondary steam recovery needle; the compressed steam is fed into the evaporation chamber aiming at the materials which do not need to be preheated; available resources are effectively utilized; the energy consumption is reduced; and meanwhile, the work efficiency is improved.

The invention discloses a wood fiber homogeneous phase transesterification modification method. Wood fibers are dissolved in an ionic liquid, transesterification agents are added to react with the wood fibers, and esterified modified wood fibers are obtained after deposition, washing, filtering and drying. The method is advantageous in that reaction conditions are mild, the technology is simple, the modification efficiency is high, the modification degree is easy to control, catalysts are not needed, products are easy to separate, no acidic by-products are generated during the reaction, degradation of wood fiber components cannot be caused, the employed ionic liquid can be recycled, and the wood fiber substitution degree is easy to control. The provided method has high practicality and good economic prospects.

The invention discloses a preparation method of a phospholipid extract of chicken skin and belongs to the technical field of food biology. An extraction method of functional phospholipids, provided by the invention, comprises the steps of preparation of the chicken skin, solvent extraction of total lipid, drying, silica gel column separation, concentration, phospholipid detection and the like. The extract obtained by using the method is rich in multiple functional phospholipids such as cephalin, lecithin and sphingomyelin, a phospholipid side chain contains unsaturated fatty acid, and the human health is facilitated. The method is simple and convenient to operate, low in cost and higher in extraction rate, and can be widely applied to preparation of the functional phospholipids in the chicken skin. The extract can be widely applied as a raw material of healthcare food.

The invention relates to a method for preparing a double-color foamed board based on temperature control, and belongs to the technical field of foaming. The invention provides a method for preparing a double-color foamed sheet based on temperature control, which comprises the following steps of: putting a foamed mother board into a mold cavity of a foaming mold, raising the temperature in the mold cavity to a first saturation temperature, injecting a foaming agent into the mold cavity, and dissolving the foaming agent into the foamed mother board, and after the foaming agent reaches a saturation state at the first saturation temperature in the foaming mother board, raising the temperature in the mold cavity to a second saturation temperature and keeping the second saturation temperature for a preset length of time, so that the foaming mother board forms a temperature gradient in the thickness direction, and after the temperature gradient is formed, releasing the pressure in the mold cavity to the environmental pressure, so that the foaming mother board expands and foams. According to the method, a temperature gradient is formed in the thickness direction of a foaming mother board by controlling the temperature in a mold cavity, so that the foaming mother board forms a melt strength difference in a foaming environment, and finally chromatic aberration is formed.

The invention provides a modifying method for heterocycle aramid and relates to the technical field of high polymer materials. The modifying method is mainly specific to the heterocycle aramid containing an imidazole structure. Bromomethylbenzoic acid is introduced to a molecular chain of a fiber, in the manner of nucleophilic substitution of imidazole nitrogen atoms; and then, high-temperature decarboxylation coupling is performed, so as to form a crosslinking structure; lastly, nucleophilic substitution reaction occurs between the fiber and the bromomethylbenzoic acid under low temperature;low temperature can avoid decarboxylation reaction, a plenty of carboxyl groups are remained on the fiber surface and the polarity of fiber surface is promoted. The modifying method has the advantagesof simple and convenient operation, low requirement for equipment, gentle reaction conditions, incapability of triggering degradation of heterocycle aramid and capability of promoting both compression strength and interlayer shear strength of heterocycle aramid. A modified heterocycle aramid, compared with the present heterocycle aramid, has higher compression strength and shear strength. The present polymerization and spinning processes need not be changed during the preparation process of the modified heterocycle aramid; the modifying process is simple; the cost is low; the modifying methodis suitable for large-scale industrial production.

In a mixed-loaded type semiconductor device including a plurality of MOS transistors having gate insulating films different in thickness, the antenna standard for the MOS transistor having the gate insulating film with a thickness equal to or smaller than a predetermined thickness is relaxed compared with that for the MOS transistor having the gate insulating film with a thickness larger than the predetermined thickness. In particular, the antenna standard for the MOS transistor having the gate insulating film with a thickness equal to or smaller than 2.6 nm allowing the tunneling of the electric charges to occur is relaxed compared with that for the MOS transistor having the gate insulating film with a thickness larger than 2.6 nm.

The invention discloses a nitrogen oxide treatment system and a method thereof, the nitrogen oxide treatment system comprises a gas mixing adjusting area, a plasma excitation area, an SO2 absorption area and an NOX reduction area which are communicated in sequence, the plasma excitation area, the SO2 absorption area and the NOX reduction area are sleeved with an insulating and heat-insulating shell, the gas mixing adjusting area is provided with a gas inlet, and the NOX reduction area is provided with a gas outlet; a gas flow rate adjusting pipe for adjusting the gas inlet flow rate of the gas inlet is arranged in the gas mixing adjusting area, and the gas mixing adjusting area is further communicated with a gas inlet pipe; an insulating tube is sleeved in the plasma excitation area, discharge copper plates are oppositely arranged in the insulating tube, and a porous drying plate is detachably arranged behind the area where the insulating tube is located; a porous absorption plate is arranged in the SO2 absorption area; a porous first catalytic reaction plate, a porous second catalytic reaction plate and a porous drying plate are sequentially arranged in the NOX reduction area. According to the treatment device and the treatment method thereof, nitrogen oxides can be efficiently treated, and SO2 poisoning and inactivation are not prone to occurring.

The invention discloses a larimichthys crocea scavenger receptor gene MARCO gene and an immune defending function thereof. An open reading frame sequence of the MARCO gene is obtained by adoption of ahomology-based cloning method and a RACE technique, the sequence is shown as SEQ ID NO:1, the overall length is 1218bp, and 405 amino acids are encoded. The MARCO gene is applied to the larimichthyscrocea immune defending function including congential immunity regulation for maintaining body health and evolution. The MARCO gene is obtained by adoption of the homology-based cloning method and theRACE technique, effectiveness in total RNA extraction in a cloning process is achieved, intrinsic RNA enzyme inactivation can be realized, and total RNA yield and purity are improved. By the immune defending function of the MARCO gene, a theoretical basis is provided for prevention of diseases caused by pathogenic bacteria, and theoretical guidance is provided for disclosing healthy aquaculture of larimichthys crocea.

The invention discloses a polyethylene terephthalate composite material. The composite material comprises 50-80 wt% of polyethylene terephthalate, 5-25 wt% of a thermoplastic elastomer containing glycidyl methacrylate, and 5-35 wt% of fibers. Correspondingly, the invention further provides a product prepared from the polyethylene terephthalate composite material and a preparation method of the polyethylene terephthalate composite material. The polyethylene terephthalate composite material provided by the invention has the characteristics of high strength, high rigidity and high impact toughness.

The invention relates to the technical field of biology, and particularly discloses a method, a probe library and a kit for detecting tumor ctDNA methylation with high throughput and high sensitivity. The method comprises the following steps: introducing two common sequencing linker sequences into DNA of a blood sample to be detected, carrying out enzyme digestion by using methylation-insensitive incision enzyme, leaving methylated DNA molecules and a non-target region without enzyme digestion sites, then carrying out PCR amplification and probe hybridization to enrich the DNA of the target region, and carrying out sequencing on the DNA of the blood sample to be detected. The methylation state of a ctDNA target area in a blood sample to be detected is analyzed and identified through high-throughput sequencing, the method has the advantages of being high in sensitivity, high in throughput and capable of achieving digital analysis, bisulfite conversion is not needed, and the problems of fragmentation and incomplete conversion caused when the ctDNA is treated through bisulfite are effectively solved.

The invention discloses anhydrous tubular metal hypophosphite and a preparation method thereof, and belongs to the technical fields of halogen-free flame retardants and preparation thereof. A molecular formula of the anhydrous tubular metal hypophosphite is M(H2PO2)n, wherein M is any one of Na, K, Ca, Mg, Al, Zn, Mn, Fe, La or Ce; n is 1, 2 or 3. The preparation method comprises the following steps of firstly dissolving a metal chloride, hypophosphorous acid and a surfactant into an organic solvent, then adding into a polytetrafluoroethylene reaction kettle, raising a temperature, reacting, and finally filtering and washing an obtained product. The anhydrous tubular metal hypophosphite provided by the invention has good heat stability, further, does not contain water, cannot cause the degradation of a macromolecular material in a processing process of modifying the macromolecular material, is of a tubular structure, and not only can be used for improving the flame retarding performance of the macromolecular material, but also can be used for ameliorating the mechanical performance of the macromolecular material; the preparation method is simple, and the anhydrous tubular metal hypophosphite is applicable to most macromolecular material, and has a wide market application prospect.

The present invention relates to a composition suitable for topical application comprising water, dimethylisosorbide, a polyol and a phenolic or polyphenolic antioxidant. The methods for producing the compositions of the invention are also part of the invention, as are the kits for preparing the compositions. Optionally, for the methods and kits, the phenolic or polyphenolic antioxidants are provided in the form of a lyophilizate. The use of a composition according to the invention for therapy by topical application is also within the scope of the invention.

The invention discloses anhydrous tubular metal hypophosphite and a preparation method thereof, and belongs to the technical fields of halogen-free flame retardants and preparation thereof. A molecular formula of the anhydrous tubular metal hypophosphite is M(H2PO2)n, wherein M is any one of Na, K, Ca, Mg, Al, Zn, Mn, Fe, La or Ce; n is 1, 2 or 3. The preparation method comprises the following steps of firstly dissolving a metal chloride, hypophosphorous acid and a surfactant into an organic solvent, then adding into a polytetrafluoroethylene reaction kettle, raising a temperature, reacting, and finally filtering and washing an obtained product. The anhydrous tubular metal hypophosphite provided by the invention has good heat stability, further, does not contain water, cannot cause the degradation of a macromolecular material in a processing process of modifying the macromolecular material, is of a tubular structure, and not only can be used for improving the flame retarding performance of the macromolecular material, but also can be used for ameliorating the mechanical performance of the macromolecular material; the preparation method is simple, and the anhydrous tubular metal hypophosphite is applicable to most macromolecular material, and has a wide market application prospect.

The invention discloses a nitrogen oxide treatment system and a treatment method, comprising a gas mixing adjustment zone, a plasma excitation zone, an SO 2 Absorption zone and NO X Reduction zone, plasma excitation zone, SO 2 Absorption zone and NO X The jacket of the reduction zone is provided with an insulating shell, the gas mixing adjustment zone is provided with an air inlet, NO X The reduction area is provided with an exhaust port; the gas mixing adjustment area is provided with a gas flow rate adjustment pipe for adjusting the intake flow rate of the air inlet, and the gas mixing adjustment area is also connected with an air intake pipe; an insulating pipe is sleeved in the plasma excitation area, and the insulating pipe There is a discharge copper plate opposite to the middle, and a porous drying plate is detachably arranged after the area where the insulating tube is located; SO 2 A porous absorption plate is arranged in the absorption area; NO X The reduction zone is sequentially provided with a porous first catalytic reaction plate, a porous second catalytic reaction plate and a porous drying plate. The treatment device and treatment method of the present invention can treat nitrogen oxides efficiently, and are not easy to SO 2 Poisoning and inactivation.

The invention relates to a cyclic aliphatic carbonate monomer with a triple bond side group, a preparation method and use thereof. 2-methyl-2-propargyl oxygen carbonyl trimethylene carbonate is synthesized from 2,2-dimethylolpropionic acid. The monomer can be used for ring-opening polymerization or ring-opening copolymerization with aliphatic cyclic ester monomer to obtain the aliphatic polycarbonate with triple bond side group or the copolymers of aliphatic polyester-carbonic ester. The polymers have advantages of the aliphatic polyester and carbonic ester, can be biodegradated. The degradation product is non-toxic. The polymers can be used for biomedical material.

The invention discloses a preparation method for plastic products and a plastic product. The method comprises the following steps: 1) forming a plastic matrix, wherein, the plastic matrix is thermoplastic or thermosetting plastic containing chemical plating catalyst precursors which are uniformly distributed in the thermoplastic or thermosetting plastic and are one or more selected from the group consisting of nitrides, borides or phosphides of copper, iron and zinc, nitrides of tin and borides or phosphides of nickel; 2) irradiating a selected area on the surface of the plastic matrix with a laser needle and decomposing exposed chemical plating catalyst precursors to obtain a chemical plating catalyst; 3) carrying out chemical copper plating on the surface of the chemical plating catalyst obtained in step 2) and carrying out at least one more chemical plating and / or electroplating so as to form a metal layer on the surface of the plastic matrix. The preparation method provided in the invention has the advantages of a simple process and low requirements on energy. Furthermore, the bonding force between a coating formed after chemical plating and the plastic matrix is fairly high.

The invention provides a preparation method of a plastic product and a plastic product. The method comprises steps of: 1) moulding a plastic matrix containing a chemical plating catalyst compound with a formula III; 2) removing plastic on a selected zone of the plastic matrix and exposing the chemical plating catalyst on a corresponding zone; 3) carrying out chemical copper facing or chemical nickel plating, continuing to carry out at least one time of chemical plating and / or electroplate to form a metal level on the plastic matrix surface. The preparation method provided by the invention has simple technology, low energy demand and low cost; besides, the chemical plating catalyst is distributed into the plastic matrix, so the coating formed after chemical plating has quite high bondingforce with the plastic matrix.