2578results about How to "Avoid adsorption" patented technology

A method for determining the concentration of a substrate in a sample solution using an electrode system comprising a working electrode and a counter electrode, both being formed on an electrically insulating base plate, and a reaction layer which contains at least an oxidoreductase and an electron mediator and is formed on the electrode system to electrochemically measure a reduced amount of the electron mediator resulting from enzyme reaction in the reaction layer, wherein a third electrode is formed as an interfering substance detecting electrode somewhere apart from the reaction layer to detect supply of the sample solution on the basis of an electrical change between the counter electrode and the third electrode. A current flowing between the counter electrode and the third electrode is measured which is taken as a positive error. Subsequently, voltage application between the counter electrode and the third electrode is released and a voltage for oxidizing the reduced form electron mediator is applied between the working electrode and the counter electrode to measure a current flowing between the two electrodes. Influences of any interfering substance such as easy-to-oxidize substance are reduced, whereby a highly reliable value of substrate determination can be obtained.

The invention features devices for mixing fluids, e.g., for lysing cells, and methods of use thereof. One device is based on the ability to control the flow of fluids, e.g., by contact angle and channel size. Fluids in this device can be divided to form segments of controlled volume, which are then brought together to initiate midxing. An exemplary use of the device is for the lysis of single cells. Another device is based on the ability to two mix two fluids in a channel and affinity capture of analytes. The devices can be integrated on the same chip with other devices, for example, for cell handling or analysis of DNA, rnRNA, and proteins released from the lysis of a cell.

The invention relates to a controlled / slow release polycarboxylate water reducing agent for inhabiting the aggregate mud content influence, which is characterized in that the controlled / slow release polycarboxylate water reducing agent comprises the following ingredients by weight parts: 75 to 95 parts of polycarboxylate water reducing agents, 2 to 5 parts of retarders and 5 to 25 parts of slow release agents. Because natural zeolite powder has the characteristics of microporous structure, large specific surface area and strong surface absorption capability, the natural zeolite powder can be used as the slow release agents. The invention utilizes the natural zeolite powder as the slow release agents, and the surface of the natural zeolite powder can absorb a large number of polycarboxylate water reducing agents and a small number of retarders after the natural zeolite powder is mixed with the polycarboxylate water reducing agents and the retarder. Clay can preferentially absorb the natural zeolite powder with strong surface absorption capability when the natural zeolite powder is doped into concrete to be stirred with gelled materials, aggregates and water, and the excessive absorption of the polycarboxylate water reducing agent by the clay is avoided, so the absorption of the polycarboxylate water reducing agents on cement grains and the dispersing effect taking are ensured.

The invention is directed to systems, methods, and apparatus for carrying out multi-stage amplification reactions, especially under fluidly closed conditions. In one aspect, methods of the invention are carried out in a fluidly closed reaction system that permits the isolation of a portion of a first (or prior) reaction mixture and its use as a sample or specimen in a second (or subsequent) reaction mixture, thereby substantially avoiding interfering effects that first reaction components may have in the second reaction if both reaction mixtures were simply combined together. In this aspect, systems, methods, and apparatus of the invention may be used with any amplification reaction that permits multiple stages of amplification based on the use of nested primers.

The invention discloses a preparation method of a photovoltaic glass surface antireflection film, which is characterized by comprising the following steps of firstly, preparing inorganic-organic hybrid silicasol; secondly, coating; thirdly, hydrophobic treatment; and fourthly, solidification treatment. Compared with the prior art, the invention has the advantages that the film-substrate cohesion between an antireflection film and substrate photovoltaic glass is stronger, and therefore, the wiping resistance of the coated photovoltaic glass surface antireflection film is enhanced; a layer of hydrophobic group with low surface energy is formed on the surface of the antireflection film, and therefore, the corrosion of moisture to a film microstructure is reduced, and the long service life of the coated photovoltaic glass is ensured; and the invention has low whole process cost and simple technical route and is suitable for industrial and large-scale application.

The invention discloses a mud resisting and slump retaining type polycarboxylic acids water reducer and a preparation method thereof. The mud resisting and slump retaining type polycarboxylic acids water reducer comprises, by weight, unsaturated polyoxyethylene ether 32.5% to 33.6%, unsaturated carboxylic acid 1.7% to 2.5%, functional monomer 3.25% to 3.36%, cross-linking agent 0.08% to 0.13%, oxidizing agent 0.12% to 0.32%, reducing agent 0.09% to 0.17%, chain transferring agent 0.03% to 0.06%, alkalinity modifier 0.86% to 1.22%, and water 60%. The water reducer in the invention has quite strong adaptability for sandstone with high silt content, good effect on mud resisting, large initial dispersibility, low cost and good slump retaining performance. Moreover, the preparation method in the invention reacts at normal temperature; has short reaction time, low energy consumption, low cost, high security coefficient, and no need to control the temperature in the whole production process; and is simple, without pollution, and suitable for commercial production.

A biosensor is constituted by disposing an electrode system including a working electrode and a counter electrode on a substrate, forming an inorganic particulate-containing layer containing inorganic particulates thereon, and forming a reagent layer containing a reagent thereon. The inorganic particulates make it possible to prevent impurities in a sample from being in contact with the electrode system and being adsorbed therein, so that measurement is performed with high precision. The inorganic particulate-containing layer can be formed by applying a dispersion system of inorganic particulates and drying them, and it is preferable that the inorganic particulates are contained in the form of aggregates.

Electronic component incorporating an integrated circuit made in a substrate (1) and a planar capacitor, characterized in that the capacitor is made on top of a metallization plane of the component, this metallization plane forming a first electrode (2) of the capacitor, and in that the capacitor comprises: a first oxygen diffusion barrier layer (5) deposited on top of the metallization plane (2); a stack (6) of several different oxide layers, each layer having a thickness less than 100 nanometres, the stack being deposited on top of the first barrier layer (5); a second oxygen diffusion barrier layer (7) deposited on top of the stack of oxide layers (6); a metal electrode (20) present on top of the second barrier layer (7).

The invention discloses a medlar and red date enzyme and a preparation method thereof, which belong to the technical field of enzyme preparation. Multi-strain composite fungi powder is adopted as a leavening agent; the medlar and the red date are adopted as main raw materials; dietary fiber, pectin hydrolyzate, seasoner extracting liquor, Chinese herbal medicine extracting liquor, enzyme stabilizer and other multifunctional auxiliary raw materials are scientifically compounded and modified; low-temperature processing technology such as ultrasonic cleaning, cryogenic grinding, microwave-assisted high-voltage pulse electric field processing and ultrasonic ripening are mainly adopted in the whole process, so that the natural colors, the flavor, the taste and the content of the active materials of the medlar and the red date are maintained furthest, the biological stability, the non-biological stability and the biological activity of the medlar and red date enzyme are obviously enhanced, the introduction of chemical addition agent is reduced, and the juicing rate of the medlar and the red date as well as the food safety of the enzyme are improved. Finally, the medlar and red date enzyme with high biological activity, strong stability, strong taste, flavor and appetite, long expiration date and edible safety is prepared.

The invention provides a denitration catalyst and a preparation method thereof. The denitration catalyst comprises: by weight, 40 to 45 parts of nano-titanium dioxide, 6 to 8 parts of nano-silica, 0.5 to 4 parts of ammonium metavanadate, 0.5 to 4 parts of ammonium paratungstate, 0.5 to 2 parts of Acesulfame K (A.K) sugar, and 3 to 5 parts of one or two moulding auxiliary agents. In the invention,trough the introduction of A.K sugar, the denitration catalyst has an excellent denitration performance and through the introduction of rare earth elements, an anti-poisoning performance of the denitration catalyst is improved greatly; the A.K sugar in the denitration catalyst has a binding effect and can improve effectively a mechanical property and a strength of the denitration catalyst thus ananti-crushing property of the denitration catalyst is improved and the problem that a denitration catalyst adopted by the prior art can be crushed frequently in use is solved.

The invention discloses a special electric stain-resistant heat insulation coating. The special electric stain-resistant heat insulation coating comprises the following components in parts by weight: 15-50 parts of a film formation emulsion, 5-30 parts of nano oxide powder, 10-20 parts of heat reflection pigment, 5-25 parts of hollow ceramic microbeads, 8-15 parts of a filler, 5-15 parts of additives and a proper amount of deionized water. The purposes of resisting stains and insulating heat can be achieved by introducing components such as nano oxide powder into the heat insulation coating. The invention also discloses a preparation method of the stain-resistant heat insulation coating. The preparation method of the stain-resistant heat insulation coating comprises the following steps: adding deionized water, part of the additives, the nano oxide powder, the hollow ceramic microbeads, the heat reflection pigment and filler into a grinder for grinding to obtain slurry; transferring the prepared slurry into a dispersing machine, adding the film formation emulsion and the rest of additives into the slurry, stirring and dispersing the slurry, filtering the slurry by a screen to obtain the stain-resistant heat insulation coating. The preparation method of the stain-resistant heat insulation coating is simple in process, easy to implement and simple and convenient to operate.

A process for recovering a precious metal from a sulfidic material comprises the steps of preparing an acidic aqueous halide solution having an oxidation potential sufficient to oxidise the sulfidic material and render the precious metal soluble in the solution, adding the material to the acidic aqueous halide solution so that the sulfidic material is oxidised and the precious metal is solubilised and separating the precious metal from the oxidised sulfidic material. In addition, a process for removing a contaminant from a contaminated sulfidic material comprises the steps of mixing the material in an aqueous solution wherein a multi-valent species of a relatively high oxidation state oxidises the contaminant to render it soluble in the solution, produces a contaminant refined material, and is reduced to a relatively lower oxidation state; and removing the contaminant from the solution whilst regenerating the multi-valent species to its relatively high oxidation state.

The present invention discloses slow-release cationic anti-mud polycarboxylic-type high performance water reducer and a preparation method thereof. The slow-release cationic anti-mud polycarboxylic-type high performance water reducer is successfully synthesized from an unsaturated carboxylic acid, a polyether macromonomer, a cationic unsaturated monomer, an unsaturated esters, a crosslinking agent, a chain transfer agent, an oxidizing agent and a reducing agent as raw materials at room temperature without heat source. By introduction of the long-chain-ester crosslinking agent and the cationic unsaturated monomer, the slow-release cationic anti-mud polycarboxylic-type high performance water reducer has good slow-release and anti-mud effects, is low in admixing volume, high in water-reducing rate, excellent in slump retention ability, and not sensitive to mud contained in sand and stones, and the process does not require an additional heat source, an be carried out at room temperature, and is low in investment, low in cost, and suitable for large scale promotion and application.

The present invention features that the waste organic gas recovering and treating apparatus includes also one rectifying and recovering system, which comprises rectifying tower between the outlet of analyzed gas and the condensator and solvent accepting trough between the rectifying tower and the condensator and is for recovering the organic solvent; and may includes also one analyzed gas by-pass cooling system and one gas distributing baffle. The method of recovering and treating waste organic gas may be alternate single stage adsorption-analysis-cooling and dehumidifying in two or three serially connected adsorbors, and through connection and arrangement of pipeline and valves, uninterrupted recovering and treating of waste organic gas is realized.

The invention discloses a coated natural plant essential oil feed additive which mainly comprises the following components: 10-40 parts of plant essential oil compound, 30-60 parts of coating core material and 10-20 parts of coating wall material, wherein the plant essential oil compound is prepared by mixing 5-10 parts of cinnamon oil, 5-10 parts of origanum oil, 3-5 parts of clove oil, 3-5 parts of lemon grass oil and 3-5 parts of sweet orange oil according to certain proportions. The plant essential oil compound and the coating core material are sufficiently mixed and adsorbed; and the coating wall material is sprayed by a bottom-spraying fluidized bed coating machine, and then screening is performed to obtain the feed additive. The feed additive disclosed by the invention consists of natural plant essential oil, has the advantages of high safety and no drug resistance, can effectively replace antibiotics, and meets the development direction of healthy culture; and since the plant essential oil is subjected to low-temperature coating treatment, the adsorption effect of the feed raw materials on the plant essential oil is avoided, the stability of the using effect is enhanced, and the shelf life is prolonged. The additive can promote the animal growth, improve the feed conversion efficiency and reduce the disease incidence.

The invention relates to a tubular nanofiltration membrane with a multi-layer structure and a preparation method thereof. The tubular nanofiltration membrane with the multi-layer structure is four-layered, and the four layers comprises a first layer, a second layer, a third layer and a fourth layer from inside to outside in sequence, wherein the first layer is a microfiltration supporting tube made from a carboxyl-contained fiber knitting tube which is filled with inorganic minerals; the second layer is a ultrafiltration layer formed by coating carboxyl-contained polymer on the outer surface of the first layer; the third layer is a nanofiltration layer made of polyamide formed by interfacial polymerization; and the fourth layer is a water loving layer forming covalent binding with the third layer. The tubular nanofiltration membrane with the multi-layer structure is obtained through the steps of forming functional layers from indie to outside in sequence, and stable chemical binding is formed among layers, so that the tubular nanofiltration membrane has excellent resistance to pressure and mechanical strength, and good water loving property, water permeability and antifouling ability; and moreover, the flux reaches more than 30 L / m<2>h, the removal rate of singlevalent salt is more than 30%, and the removal rate of bivalent salt is more than 95%.

A MEMS resonator and a method for manufacturing thereof are provided, in which an adsorption of a beam into a substrate in a wet process when manufacturing a MEMS is prevented and other oscillation modes, which are unnecessary, than a required oscillation mode are not mixed at the time of operation. Further, a communication apparatus including a filter that has the MEMS resonator is provided. The MEMS resonator includes a substrate in which a lower electrode is formed and a beam formed on the substrate, in which at least one support column is provided between the substrate and the beam. As a filter, the communication apparatus includes a filter of the above MEMS resonator.

The invention discloses arsenic removal material by adsorption of electrochemistry strengthened carbon fiber loaded nano ferro-manganese and an arsenic removal method by using the material. The material comprises a substrate material and nano ferro-manganese oxidesloaded on the substrate material through electrochemistry and electro-deposition; the substrate material can be carbon fiber yarns, carbon fiber felts or graphite carbon fiber felts, and the shape of the substrate material is cylindrical or flat-shaped; and when a three-dimensional electrode is used, the substrate material is activecarbon. The arsenic removal material is prepared by performing ferro-manganese metal salt surface electro-deposition on the substrate material by electrifying. The arsenic removal method comprises the following steps of: carrying out coupling electro-absorption in the process of arsenic removal by chemical absorption, and strengthening the arsenic removal effect by using the electro-absorption action of a charging capacitor in the absorption process; applying reverse current to facilitate arsenic desorption on a surface of ferro-manganese hydrated oxide in a regeneration process, and simultaneously applying high voltage to perform hydrolysis, hydrogen generation and oxygen evolution so as to facilitate activity regeneration of the ferro-manganese oxide. With the adoption of the material and the method, the high absorption effect and the quick regeneration capability can be achieved.

The invention relates to steel ladle furnace slag modifying agent in a converter steel tapping process. The de-oxidation modifying agent for the steel ladle top slag comprises the following main components in percentage by weight: 30%-50% of Al, 50%-30% of CaO, 5.0%-8.0% of Al2O3, not more than 3.0% of SiO2, not more than 0.07% of S+P, 0.7%-1.4% of C, 3.0%-8.0% of CaFe2 and not more than 0.2% of H2O. The modifying agent disclosed by the invention is a reductive modifying agent which can be used for solving an oxidation problem of the steel ladle top slag in a low-carbon pipeline steel production process, so that guarantee is provided for vacuum desulfurization and pure production of the pipeline steel.

The invention discloses an implantable human blood glucose concentration continuous monitoring system based on optical fiber attenuation total reflection, consisting of double optical paths and comprising a light source, an attenuator, a spectroscope, an optical fiber coupling device, an optical fiber ATR sensor, a measurement photodetector, a reference photodetector, a data collection system anda computer, wherein after being attenuated by the attenuator, the light source is divided into two optical paths formed by a measurement light and a reference light; in one optical path, the measurement light enters the optical fiber ATR sensor in a coupling way through a coupling method by the optical fiber coupling device and is received by the measurement photodetector via a transmission lightof the optical fiber ATR sensor; in the other optical path, the reference light is directly received by the reference photodetector; signals recevied by the measurement photodetector and the reference photodetector are synchronously collected by the data collection system, are sent to the computer and are in analysis treatment, and the computer displays a measurement result and is also connected with the light source. The invention adopts a direct measurement in vivo method to directly measure the glucose concentration in a tissue fluid, thereby avoiding an error of measurement in vitro.

The invention discloses electrolyte for a lithium titanate battery. The electrolyte comprises a solvent, a solute and an additive, wherein the additive contains cyclic phosphate with the structural formula (1), (2), (3) or (4), R represents for a hydrocarbyl group of C1 to C6, a ketone group of C2 to C6, an ether group of C2 to C6 or a halogen element, and R' represents for a saturated hydrocarbyl group of the C2 to te C6 or unsaturated hydrocarbyl group of the C2 to the C6. In addition, the invention also discloses a lithium titanate battery.

The invention discloses a lithium-sulfur battery cathode material, a preparation method, and a lithium-sulfur battery, and belongs to the technical field of lithium-sulfur battery materials. The lithium-sulfur battery cathode material is a carbon-sulfur composite material, which is coated by a carbon cladding layer with a micro-porous structure. In the preparation method, under a vacuum condition, the raw materials are heated, just in one step, the sulfur and the carbon matrix are uniformly combined, the carbon precursor is carbonized, and the coating on the carbon-sulfur composite material is achieved. Compared with the conventional low-temperature coating method, the carbon cladding layer, which is carbonized at a high temperature and has a micro-porous structure, can form interactions just like the chemical bonds with the carbon-sulfur composite material; so that the micro-porous carbon cladding layer and the carbon-sulfur composite material are tightly combined together, thus the sulfur and discharge products cannot be easily dissolved in the electrolyte, the shuttling effect is prevented, the utilization rate of sulfur is improved, at the same time, the conductivity of the cathode material is better improved, and the cycle stability and capacity retention rate of the lithium-sulfur battery are both improved.

The invention relates to the technical field of concrete admixtures, in particular to a clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer and a preparation method thereof. With polyether macromonomers, unsaturated carboxylic acid, unsaturated carboxylic ester, dibasic acid anhydride, a crosslinking agent, amide monomers, unsaturated phosphate ester, phosphate, an oxidizing agent , a reducing agent, a chain transfer agent, a neutralizing agent and water as raw materials, the clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer is synthesized at normal temperature. Ester groups, amide groups and phosphate ester are introduced into the molecular structure of the polycarboxylate superplasticizer, and light crosslinking of the polycarboxylate superplasticizer is realized through the long-chain ester crosslinking agent, so that the superplasticizer has a good clay-resisting and slump-retaining effect and has the advantages of low mixing amount, high water reducing rate, high adaptability to clay-containing sand, good slump retaining performance and the like; besides, only normal-temperature polymerization is needed, the processis simple, the production cost is low, and the superplasticizer is suitable for industrial production.

The invention discloses a method for preparing a contamination-resistant composite reverse osmosis membrane. The method comprises the steps of (a) preparing a polysulfone support membrane; (b) preparing an aromatic polyamide reverse osmosis composite membrane by using the polysulfone support membrane obtained in Step (a); and (c) grafting chitosan on the surface of the aromatic polyamide reverse osmosis composite membrane obtained in Step (b). According to the method for preparing a contamination-resistant composite reverse osmosis membrane, chitosan is grafted on the surface of the polyamide reverse osmosis composite membrane through a chemical treatment method, so that hydrophilicity of the surface of the membrane as well as the water flux of the membrane is improved; meanwhile, contaminations such as hydrophobic organic matters and transition metal ions can be prevented from being absorbed on the surface of the membrane, thereby greatly improving the anti-pollution capability of the membrane; in addition, chitosan has broad-spectrum antibacterial property, so that the resistance of the membrane against microbial contamination is improved.

The present invention relates to activated carbon sorbents including nitrogen. In various embodiments, the present invention provides an activated carbon sorbent including a halogen- or halide-promoted activated carbon, the activated carbon sorbent particles including nitrogen in a surface layer of the sorbent particles. In various embodiments, the present invention provides a method of reducing the pollutant content in a pollutant-containing gas using the activated carbon sorbent. In various embodiments, the activated carbon sorbent can remove mercury from a mercury-containing gas that includes sulfur(VI) such as SO3 more efficiently than other sorbents.

The present invention relates to a cleaning solution capable of removing efficiently at the same time particles and metallic impurities from a substrate surface without corroding metallic materials.The cleaning solution for cleaning substrates of electronic materials comprises an organic acid compound and at least one selected from the group consisting of dispersants and surfactants.

The invention provides a loudspeaker module. The loudspeaker module comprises a shell and a loudspeaker monomer contained in the shell, wherein the loudspeaker monomer divides a cavity formed by the shell into a front vocal cavity and a rear vocal cavity; the rear vocal cavity is filled with acoustic materials; heteroatoms are doped in the crystal structures of the acoustic materials. The loudspeaker module provided by the invention can reduce the adsorption of acoustic materials inside the loudspeaker module to heterogeneous molecules, and even reject the heterogeneous molecules, so as to guarantee that the acoustic materials are long-term effective and improve the stability of the acoustical property of the loudspeaker module.

The invention relates to a three-dimensional printing device and a forming method for a three-dimensional object. The three-dimensional printing device comprises a photosensitive resin feeding device, an annular conveying belt, a printing platform, an optical processing device, a control device, tension adjusting wheels, a collecting scraper and a recovery tank. The control device is respectively connected with the photosensitive resin feeding device, the annular conveying belt, the printing platform, the optical processing device and the tension adjusting wheels, and therefore the control effect on the parts is achieved. The three-dimensional printing device is reasonable in structural design, and the forming efficiency of the three-dimensional object is improved.

The invention relates to high-strength lightweight aggregate concrete and a preparation method thereof, and belongs to the technical field of building material concrete. The lightweight aggregate concrete is prepared from the following raw materials in parts by weight: 105-118 parts of cement, 180-185 parts of light coarse aggregate, 120-125 parts of fine aggregate, 65-70 parts of mineral admixtures, 9-24 parts of modified polypropylene fiber, 3.4-3.8 parts of concrete admixtures and 65-70 parts of water. The preparation method comprises the following steps that the raw materials are weighed according to the formula ratio, the light coarse aggregate is added into water accounting for one half of the total water amount for pre-wetting for 45-60 minutes, then the fine aggregate is added, stirring is carried out for 1-2 minutes, the cement, the mineral admixtures and the modified polypropylene fiber are continuously added, uniform stirring is carried out, then the concrete admixtures andthe rest water are added, and uniform stirring is carried out so as to obtain the high-strength lightweight aggregate concrete. The high-strength lightweight aggregate concrete and the preparation method thereof have the advantages that the strength is high, and the quality is stable.

The invention discloses a rotary drum type dust remover, comprising a housing, a plurality of filter cylinders arranged in the intracavity of the housing for isolating dust, a main motor for driving filter cylinders, an impulse sweep system for cleaning the deposit dust on the surface of the filter cylinder, a chain typed scraper chain conveyor for cleaning dust, a spiral ash transportor and a dust discharge valve. The dust remover has the advantages of low dust concentration requirement for the air to be purified, ability to remove dust in various environments, and stable dust removal efficiency; and high temperature resistance, high humidity resistance, acid and alkaline corrosion resistance, electrostatic prevention as the filtered cloth material is stainless steel material; and ability to be used independently, also to be used multi-parallelly, and to select the number of single machine in an unit according to different discharge standard.