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538 results about "Particle suspension" patented technology

Method and apparatus for sensing and characterizing particles

Apparatus for sensing and characterizing particles (e.g., blood cells or ceramic powders) suspended in a liquid medium comprises a conduit through which the particle suspension is caused to pass simultaneously with an electrical current. According to the invention, the interior wall of the conduit effectively varies in resistivity along the length of the conduit to define a delimited central region of high electrical resistivity which is smoothly contiguous on its opposing boundaries to uninsulated distal elements of lesser electrical resistivity. The delimited central region of the conduit functions as a Coulter volumeter conduit. The uninsulated distal elements of the conduit are made to have a dimension along the conduit wall which is at least equal to the axial extent of the effective ambit electric fields of a traditional Coulter volumeter conduit having a cross-sectional geometry identical to that of the delimited central region of high resistivity in the improved volumeter conduit. According to a preferred embodiment of the invention, the delimited central region of the improved volumeter conduit is defined by a traditional Coulter conduit wafer, i.e., a dielectric wafer containing a central circular conduit, and the distal elements of lesser resistivity are defined by uninsulated, electrically conductive, circular collars attached to opposite sides of the conduit wafer. The conduit in the conduit wafer and the openings in the conductive collars collectively form a hydrodynamically smooth volumeter conduit, in which the electric and hydrodynamic fields of the traditional volumeter conduit are advantageously amended in the manner above noted.
Owner:COULTER INTERNATIONAL CORPORATION

Method for preparing submicron particle suspensions

The present invention provides a method for preparing a suspension of a pharmaceutically-active compound, the solubility of which is greater in a water-miscible first organic solvent than in a second solvent which is aqueous. The process includes the steps of: (i) dissolving a first quantity of the pharmaceutically-active compound in the water-miscible first organic solvent to form a first solution; (ii) mixing the first solution with the second solvent to precipitate the pharmaceutically-active compound; and (iii) seeding the first solution or the second solvent or the pre-suspension.
Owner:BAXTER INT INC

Liquid detergent composition comprising an external structuring system comprising a bacterial cellulose network

A structured liquid detergent composition in the form of a liquid matrix made up of an external structuring system of a bacterial cellulose network; water; and surfactant system including an anionic surfactant; a nonionic surfactant; a cationic surfactant; an ampholytic surfactant; a zwitterionic surfactant; or mixtures thereof, wherein said liquid matrix has a yield stress of from about 0.003 Pa to about 5.0 Pa at about 25° C. and provides suitable particle suspension capabilities and shear thinning characteristics.
Owner:THE PROCTER & GAMBLE COMPANY

Method of making composite particles with tailored surface characteristics

The invention describes a procedure to make metal containing composite particles and composite particle suspensions. The procedure is versatile and can produce particles with a variety of particle sizes and compositions. For some applications the metal composite particles can provide the functionality of wholly metallic particles including configurations where the metal is located on the particle surface. Such metals have application in a wide variety of fields, including accomplishing electrochemical reduction and catalysis.
Owner:ONMATERIALS

Microparticle delivery syringe and needle for placing particle suspensions and removing vehicle fluid

A syringe having two or more chambers having a needle defining two or more lumens for injecting a microparticle suspension into a desired space, the lumens being in fluid communication with respective chambers. One of the chambers has the microparticle suspension disposed therein while the other chamber is empty. The lumen in fluid communication with the empty chamber has a filter element disposed therein such that the suspension fluid may be withdrawn from the space into the empty chamber without withdrawing the microparticles.
Owner:WARSAW ORTHOPEDIC INC

Method for producing polymer-particle composites

An objective of the invention is to provide a method for producing a polymer-particle composite by which a polymer-particle composite having a desired particle density and a desired film thickness can be produced conveniently without allowing the particle to be aggregated in the polymeric matrix. To accomplish the objective described above, the present invention provides a method for producing a polymer-particle composite comprising a step of forming a polymer-containing layer mainly consisting of a polymeric material and a step of bringing a particle suspension containing the particle suspended in a solvent capable of swelling the polymeric material into contact with the polymer-containing layer.
Owner:3M INNOVATIVE PROPERTIES CO +1

Method of using triaxial magnetic fields for making particle structures

A method of producing three-dimensional particle structures with enhanced magnetic susceptibility in three dimensions by applying a triaxial energetic field to a magnetic particle suspension and subsequently stabilizing said particle structure. Combinations of direct current and alternating current fields in three dimensions produce particle gel structures, honeycomb structures, and foam-like structures.
Owner:NAT TECH & ENG SOLUTIONS OF SANDIA LLC

Porous polypropylene particle suspension solid phase graft-modification method

The invention relates to a method for modifying grafting for porous polypropylene particle floating solid phase. The invention modifies floating solid phase grafting for polypropylene particle absorbed with monomer and initiator in salt solution, to increase grafting depth, reduce degradation and side reaction, and improve mechanics property for polypropylene. The modified product can also be used as compatible agent for PP and other polymer to increase material compatibility and then improve mechanics property.
Owner:BEIJING UNIV OF CHEM TECH

Spherical silica/polyimides composite membrane, preparation thereof and applications

The invention discloses a spherical silicon dioxide / polyimide composite film and a method for making the same as well as an application. The method for making the spherical silicon dioxide / polyimide composite film comprises the following steps that: 1) spherical silicon dioxide particles are scattered into an organic solvent evenly to obtain the spherical silicon dioxide particle suspension liquid; 2) a surface treatment agent, a molecular weight modifying agent, an auxiliary adhesive, a flatting agent and aromatic series diamine are dissolved inside the spherical silicon dioxide particle suspension liquid; organic dicarboxylic anhydride is added to be stirred in order to obtain a spherical silicon dioxide / polyamide acid mixing resin solution; 3) the mixing resin solution is coated on the surface of a flat substrate and is heated up to make the solvent volatilize and complete the imide reaction to obtain the spherical silicon dioxide / polyimide composite film. The spherical silicon dioxide / polyimide composite film has good mechanical property, good corona resistance, low thermal coefficient of expansion and low moisture absorption ratio, and has important application value in an insulating system of a frequency conversion speed motor.
Owner:INST OF CHEM CHINESE ACAD OF SCI

Light-transmitting, breathable and static electricity repellent PM2.5 air filter membrane and preparation method thereof

The invention discloses a light-transmitting, breathable and static electricity repellent PM2.5 air filter membrane and the preparation method thereof. The air filter membrane is characterized by being provided with at least one layer of non-woven fabric base material or screen net and at least one layer of ultrathin electrostatic spinning nano fiber layer. The preparation method comprises the steps of impregnating the non-woven fabric base material, the screen net or the ultrathin electrostatic spinning nano fiber layer in a tourmaline nano-particle containing suspension or spraying the tourmaline-containing nano particle suspension on the on-woven fabric base material, the screen net or the ultrathin electrostatic spinning nano fiber layer and drying, wherein the mass percentage of tourmaline nano particles in the suspension is 1-30%, the suspension further comprises a bonding agent, so that the tourmaline nano particles can be wrapped on the surface of the non-woven fabric base material, the screen net or the ultrathin electrostatic spinning nano fiber layer. The air filter membrane applied in a window screen is prepared by adopting the nano fiber technique and electrostatic repulsion and fine particulate matter PM2.5 is guaranteed to be blocked outside when a window is opened for ventilation.
Owner:上海展恒环保科技有限公司

Latent self-repair microcapsule and preparation method thereof

ActiveCN102604469AAfter solving the inflow crackSolve catalystCoatingsMicroballoon preparationVacuum dryingChemistry
The invention belongs to the technical field of preparation of a microcapsule, and relates to a latent self-repair microcapsule for an organic coating and a preparation method of the latent self-repair microcapsule. The method comprises the steps of feeding urea and formaldehyde mixed solution into a four-mouth flask, adjusting the pH value to 7.5-11.8 with triethanolamine, and ensuring that the temperature is slowly increased for reaction for 3 hours, so as to produce viscous transparent water-soluble urea-formaldehyde prepolymer solution; sufficiently mixing a capsule-core epoxy resin, a capsule-core diluting agent, and a capsule-core latent curing modifier proportionally, adding distilled water, stirring, adding an emulsifying agent, emulsifying for 10-20min in a high-speed emulsifyingmachine, so as to form O / W type emulsion, mixing the urea-formaldehyde prepolymer solution and the emulsified liquid and sufficiently stirring to disperse in an aqueous medium, adjusting the pH valueto 1.0 to 5.0, centrifugating the particle suspension after curing at a controlled temperature for 3 hours, performing flushing for a plurality of times, and then performing vacuum drying to obtain the microcapsule. The method has the advantages that the technology is simple, the condition is easy to control, the preparation cost is low, the product quality is good, the repair effect is good, themanpower and cost are saved, and the method is environment-friendly.
Owner:725TH RES INST OF CHINA SHIPBUILDING INDAL CORP

Chemiluminescence quantitative detection kit for procalcitonin, and preparation method and detection method thereof

The invention relates to a chemiluminescence quantitative detection kit for procalcitonin, and a preparation method and detection method thereof. The kit comprises a procalcitonin series standard substance, a magnetic separation reagent (magnetic particle suspension coupled with streptavidin), a first reagent (anti-procalcitonin monoclonal antibody solution containing biotin N-hydroxysuccinimide ester label) and a second reagent (anti-procalcitonin monoclonal antibody solution containing alkaline phosphatase label). The sensitivity of the kit prepared from the magnetic particle suspension coupled with streptavidin, anti-procalcitonin monoclonal antibody solution containing biotin N-hydroxysuccinimide ester label and anti-procalcitonin monoclonal antibody solution containing alkaline phosphatase label is up to 0.008ng / ml; and the kit has the advantages of high accuracy, high precision, no need of prediluting the sample, and wide detection range, and is simple and time-saving to operate.
Owner:SUZHOU HAOOUBO BIOPHARML

Process of forming and modifying particles and compositions produced thereby

The present invention relates to processes for forming particles including drugs in a solution, changing the bulk or surface properties of a drug particle, and/or microencapsulation drug particles, and compositions produced thereby. In some embodiments, the process described utilized mechanical agitation, more specifically low-frequency sonication, under controlled conditions, which provides mild shear forces during forming and/or precipitation to control the particle growth and mixing properties. Particle size can range from less than about 200 nanometers to greater than about one millimeter, depending on the processing conditions and application. The process described can be used to form a drug particle suspension, dry a wet powder slurry or suspension, as well as to improve the surface properties of the particle through conditioning the structure of the particle or particle surface and/or annealing the particle or particle surface. Annealing or conditioning drug particles may be used to force an amorphous to crystalline transition, creating a more stable powder, or smooth a particle surface. In addition, the process can be used to microencapsulate particles by suspending the microparticles in a non-solvent including a coating material (such as a biodegradable polymer) under controlled process conditions. The powder compositions produced thereby possess improved properties including, but not limited to, improved flow and dispersibility, controlled bioadhesion, stability, resistance to moisture, dissolution/release profiles, and/or bioavailabilities. This process, and the compositions produced, provide significant advantages in the manufacture of pharmaceutical particulate formulations, as well as biomedical, diagnostic, and chromatography particulate compositions, where sensitive macromolecules, such as proteins or DNA, are involved that would be degraded using more rigorous processing conditions or temperatures.
Owner:NANOSHIFT LLC

Method for manufacturing nanostructured thin film electrodes

A method for a binder-free manufacturing a nanostructured porous film, e.g. for use in solar cells, includes the steps of preparing a suspension of semi-conducting nanometer-sized particles in a volatile suspending agent (21), depositing the particle suspension on a conducting substrate, removing the suspending agent by evaporation (31), thereby leaving a particle layer on said substrate and compressing (P) the deposited particle layer for mechanical and electrical interconnection.
Owner:FORSKARPATENT I UPPSALA

Particle analyzer of sheath-flow impedance method

The invention puts forward a sheath flow impedance particle analyzer, comprising a counting cell, a counting circuit, a latter sheath partition cell and a liquid waste partition cell; wherein, the counting cell comprises a former cell and a latter cell; the former cell comprises a particle suspension liquid inlet and a former sheath liquid inlet; the latter cell comprises a latter sheath liquid inlet and a liquid waste outlet; a hole is arranged between the former cell and the latter cell which are connected with the counting circuit through electrode; the latter sheath liquid stored in the latter sheath partition cell can automatically and continuously flow into the latter cell under the gravitation and the internal negative pressure in the latter cell; the latter sheath partition cell can make the internal liquid passageway, which connects the inlet and the outlet of the latter sheath partition cell, insulated by the air; the liquid waste partition cell can make the internal liquid passageway insulated, which connects the inlet and the outlet of the liquid waste partition cell. The invention has the advantages of preventing the reflowing of the sample liquid in the process of detecting, reducing the signal noise effectively, increasing the detecting sensitivity of the particle and avoiding the electromagnet noise introduced to the counting cell from the latter sheath partition cell or the liquid waste partition cell.
Owner:SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD +1

Magnetic particle parallel processing apparatus permitting repeated use of container and method of magnetic particle parallel processing permitting repeated use of container

To provide a magnetic particle parallel processing apparatus permitting repeated use of a container, and a method of magnetic particle parallel processing permitting repeated use of a container, with which the rate of repeated use of a container is enhanced to thereby achieve a saving in the working space and a saving in the working time. The apparatus comprises: at least one reaction container; a liquid disposal tank; a reagent etc. feeder with at least one flow channel for feeding at least one type of liquid selected from the group consisting of two or more types of solutions and a magnetic particle suspension according to the processing content, at a given amount and at a given timing, to the reaction container; and a magnetic separator which has at least one processing nozzle with a distal end insertable into the reaction container and the liquid disposal tank, for sucking and discharging a liquid through the distal end, and which also has a magnetic means capable of applying a magnetic field to the interior of the distal end to thereby attract magnetic particles contained in the liquid inside the distal end to the inner wall thereof to effect separation of the magnetic particles, and canceling the magnetic field to thereby release the attracted magnetic particles and re-suspend the same in a liquid.
Owner:UNIVERSAL BIO RESEARCH CO LTD

Method for preparing polymer/houghite nano composite material

InactiveCN101560271ARealize surface organic modificationNanocompositeEmulsionHydrotalcite
The invention provides a method for preparing a polymer / houghite nano composite material, and the method comprises the following steps: 1) houghite is added to de-ionized water, and houghite suspension is obtained under the conditions of stirring and ultrasound; 2) a monomer, an anionic surfactant, an initiator and the de-ionized water are added into a polymer reactor, polymerization reaction is executed after the mixture is stirred uniformly, and polymer emulsion is obtained after cooling; and 3) the houghite suspension and the polymer emulsion are mixed and stirred to ensure houghite lamella and emulsion particles to form composite particles by electrostatic adherence, then the stirring is stopped, the composite particle suspension is filtered, washed and dried, and the polymer / houghite nano composite material is obtained. The method can realize organic modification of the houghite and the nano composition with the polymer in one step and has the advantages of low cost, simple operation and the like. In the prepared nano composite material, the houghite has good stripping dispersivity, and the interaction between the lamella and the polymer matrix can be regulated.
Owner:ZHEJIANG UNIV OF TECH

Graphene/carbon nano tube hybridized filler network enhanced rubber material and preparation method thereof

The invention discloses a graphene / carbon nano tube hybridized filler network enhanced rubber material and a preparation method thereof. According to the rubber material, graphene and carbon nano tubes are taken as filler, a hybridized filler network is formed in a rubber material matrix, wherein 100 parts by mass of the rubber material matrix are adopted, and 0.1-20 parts by mass of graphene and the carbon nano tubes are adopted. The rubber material is prepared according to steps as follows: oxidized graphene and the carbon nano tubes are added to water, and a hybridized suspension liquid is prepared; the prepared hybridized suspension liquid is added to an emulsion of the rubber material matrix and mixed, a demulsifier is added for demulsification, an oxidized graphene / carbon nano tube / rubber particle suspension liquid is prepared, then, a reducing agent is added for a reduction reaction, solid-liquid separation is performed after sufficient reaction, an obtained solid phase is washed and dried, and the rubber material is prepared. The graphene and the carbon nano tubes form the hybridized filler network in the rubber material and have an energy dissipation function, so that the rubber material has excellent mechanical property, fatigue resistance, crack growth resistance and conductive property.
Owner:SICHUAN UNIV

Triiodothyronine quantitative detection kit and preparation method thereof

The invention discloses a triiodothyronine quantitative detection kit which comprises magnetic particle suspension coated with diiodothyronine-gelatin, a triiodothyronine series calibrator, a triiodothyronine antibody labelled by horseradish peroxidase, a dissociation agent, a chemiluminescent substrate A, a chemiluminescent substrate B and wash concentrate. The invention further discloses a preparation method of the kit. The invention has the advantage that a chemical structural analogue of hormone is coated by a method for coating an antigen analogue with a labelled antibody, and the analogue and the detected hormone have identical immune correlation, thus realizing specific binding of the analogue and the antibody of the hormone; but the binding capability of the analogue with thyroid-binding protein (THBP) is significantly lowered, thus reducing influence of the binding protein on a measuring system to a large extent. The kit has greatly improved sensitivity and precision, greatlyenlarged detection range, greatly shortened reaction time, enhanced product properties and lowered product cost.
Owner:AUTOBIO DIAGNOSTICS CO LTD

Particle suspensions of flocculating polymer powders and powder flocculant polymer blends

Powder blends are described comprising blends of particulate water soluble high molecular weight polymer flocculants. The polymer flocculants can include polyethylene oxide, polyacrylamide, copolymers thereof and combinations thereof. The powder blends allows the use of fine powders while reducing potential air quality and safety issues. The powder blends can be used for waste water purification, fiber dewatering, and the like. The powder blends can be diluted by a water dilution flow prior to entering a waste water stream.
Owner:PSMG

Quantitative detection kit combining magnetic particles with chemiluminescence immunoassay for beta human chorionic gonadotropin (beta-hCG), and preparation method of kit

ActiveCN102998467AImprove performanceLow cross-reaction coefficientBiological testingBiotin-streptavidin complexAbzyme
The invention discloses a quantitative detection kit combining magnetic particles with chemiluminescence immunoassay for beta human chorionic gonadotropin (beta-hCG). The kit comprises beta-hCG calibrators, magnetic particle suspension coupled with streptavidin, a beta-hCG antibody labeled with biotin, a beta-hCG abzyme combination, a beta-hCG quality controller, chemiluminescence liquor A, chemiluminescence liquor B, 20 times concentrated washing liquor, and a reaction tube, wherein enzyme adopted by the beta-hCG abzyme combination is horse radish peroxidase with the purity RZ being more than or equal to 3.0 and the activity being more than or equal to 250U / ml. The invention also discloses a preparation method of the kit. Compared with the conventional kit, the quantitative detection kit is simple and convenient to operate, is safe, does not cause environment pollution, and also has the advantages of wide concentration range, low cost, good stability and the like of detection samples.
Owner:BIOSCIENCE (TIANJIN) DIAGNOSTIC TECH CO LTD

Kit for chemiluminescence immunity quantitative detection of MYO (myohaemoglobinnano) nano magnetic particle and preparation method of kit

The invention discloses a kit for chemiluminescence immunity quantitative detection of an MYO nano magnetic particle. The kit comprises an MYO calibrator, a nano magnetic particle suspension liquid coupled with streptavidin, bioti-labeled MYO antibodies, MYO abzyme conjugate, an MYO quality control product, a chemiluminescence liquid A and a chemiluminescence liquid B, a 20-time concentrated washing liquor and a reaction tube, wherein for the MYO abzyme conjugate, used enzyme adopts horse radish peroxidase with purity RZ larger than or equal to 3.0 and activity larger than or equal to 250 U / mL. Besides, the invention further discloses a preparation method of the kit. Compared with the conventional kit, the kit provided by the invention has the advantages of high sensibility and test automation, wide measurable concentration range, long useful life of a reagent, simple operation and the like.
Owner:BIOSCIENCE (TIANJIN) DIAGNOSTIC TECH CO LTD

Nitrification inhibitor treatment of grazed pasture soils

InactiveUS20060089260A1Emission reductionReduce potassium, calcium and magnesium leachingBiocideFertilising methodsSoil scienceNitrification inhibitors
A nitrification inhibitor treatment used as a soil mangement tool on grazed pasture soils. The treatment includes the application of nitrification inhibitors in solution form and / or line particle suspension form and / or in crystalline form to treat the whole area of grazed pasture soils to: reduce nitrate leaching; reduce nitrous oxide emissions; reduce postassium, calcium and magnesium leaching; and increase pasture production in both the animal urine patch areas and non-urine patch areas. The nitrification inhibitors can be applied in conjunction with irrigation water, by a spray vehicle or in a similar way to the application of agricultural chemicals.
Owner:LINCOLN UNIVERSITY +1

Thyroid peroxidase antibody magnetic-particle chemiluminescence immune quantitative testing kit

InactiveCN104237513AStrong specificityNo cross-reactivityMaterial analysisAntigenThyroperoxidase Antibody
The invention discloses a thyroid peroxidase antibody (TPO-Ab) magnetic-particle chemiluminescence immune quantitative testing kit. The TPO-Ab magnetic-particle chemiluminescence immune quantitative testing kit comprises a TPO-Ab calibrator, a magnetic particle suspension coupled with streptavidin, biotin-labeled thyroid peroxidase antigen, mouse anti-human enzyme-labeled conjugate, TPO-Ab quality control materials, chemiluminiscence liquids A and B, 20-time-concentrated washing liquid and a reaction tube, wherein the enzyme utilized in the mouse anti-human enzyme-labeled conjugate is horseradish peroxidase, the purity level RZ of the horseradish peroxidase is greater than or equal to 3.0, and the activity level of the horseradish peroxidase is greater than or equal to 250 U / mL. The invention also discloses a preparation method of the TPO-Ab magnetic-particle chemiluminescence immune quantitative testing kit. Compared with existing kits, the TPO-Ab magnetic-particle chemiluminescence immune quantitative testing kit has the advantages of being high in sensitivity, wide in testable concentration range, long in period of validity of reagent, simple in operation, high in automation degree and the like.
Owner:BIOSCIENCE (TIANJIN) DIAGNOSTIC TECH CO LTD
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