167 results about "Air liquid interface" patented technology

A system and method of reducing particle generation in packaging containers used to transport ultra pure liquids. Particle generation in the containers is reduced by reducing the air-liquid interface present during filling, transport, and dispensing of the liquid.

Systems are described for delivery of a wide variety of materials in which liquid and gas or vapor states are concurrently present, from a package preferably including a fluid-containing collapsible liner. Headspace gas is removed from a pressure dispensing package prior to liquid dispensation therefrom, and ingress gas is removed thereafter during dispensation operation. At least one sensor senses presence of gas or a gas-liquid interface in a reservoir or gas-liquid separation region. A gas removal system including an integral reservoir, at least one sensor, and at least one flow control elements may be included within a connector adapted to mate with a pressure dispensing package, for highly efficient removal of gas from the liquid being dispensed from the container.

Disclosed is a cervico-vaginal tissue equivalent comprised of vaginal epithelial cells and immune cells, cultured at the air-liquid interface. The tissue equivalent is capable of being infected with a sexually transmitted pathogen such as a virus (e.g., HIV), a bacteria, a helminthic parasite, or a fungus. The tissue equivalent is also capable of undergoing an allergic-type reaction or an irritant-type reaction. The tissue equivalent is characterized as having nucleated basal layer cells and nucleated suprabasal layer cells, and further as having cell layers external to the suprabasal layer progressively increasing in glycogen content and progressively decreasing in nuclei content. Immune cells of the tissue equivalent are primarily located in the basal and suprabasal layers. Also disclosed are methods for producing the tissue equivalent. The methods involve providing vaginal epithelial cells and immune cells, seeding the cells onto a porous support, and co culturing the seeded cells at the air-liquid interface under conditions appropriate for differentiation. One such method disclosed is for generation of the tissue equivalent in serum free medium. Specific cells from which the tissue equivalent is generated, and also specific preferred components of the medium in which the tissue equivalent is generated are provided. Also disclosed is a cervico-vaginal tissue equivalent produced by the methods disclosed herein.

The invention provides a method for preparing a graphene aerogel through constant pressure drying. The method comprises the following steps of: firstly, preparing a hydrogel by using aqueous dispersions of oxidized graphene as raw materials; processing the hydrogel by freezing and melting so as to reassemble the internal structure of the hydrogel, wherein the formed structure is strong enough to resist the structure collapse caused by air-liquid interface tension during constant pressure drying; and finally, realizing the preparation of the graphene aerogel through constant pressure drying. Compared with a freeze drying method and a supercritical drying method, the method disclosed by the invention has the advantages that the efficiency for preparing the graphene aerogel is greatly improved, the production cost is reduced, and the industrialized production of the graphene aerogel is hopeful to realize. In addition, the invention further provides a novel graphene aerogel, and the characteristics of macropores and super resilience, of the graphene aerogel, can be applied in many fields.

Methods are provided for long term culture of mammalian intestinal cells. Cultures are initiated with fragments of mammalian intestinal tissue, which are then maintained embedded in a gel substrate that provides an air-liquid interface. Intestinal epithelium in cultures of the invention can be continuously grown for extended periods of time. Mammalian intestinal cells cultured by the methods of the invention recapitulate features of intestinal growth in vivo.

This invention is a process for managing the gas flow through a plurality of bioconversion modules that provide a gas liquid interface. The conversion modules provide the gas liquid interface across an activated surface that converts at least some of the gas components into desired liquid products. Arrangement of the modules and control of gas flow in accordance with this invention enhances the utilization of the gas and the production of desired liquid products by adjusting the flow area to compensate for changes in the volume of the feed gas. Improved control of the gas velocity through the bioconversion modules eliminates problems of liquid condensation and flow maldistribution. The process may sequence the modules to mitigate time variation in microorganism activity and incorporate additional periodic process steps.

Methods of preventing air-liquid interfaces on the surface of a wafer in order to prevent the formation of particle defects on a wafer are presented. The air-liquid interfaces may be prevented by covering the entire surface of the wafer with liquid at all times during a cleaning process while the surface of the wafer is hydrophobic. Methods of preventing the formation of silica agglomerates in a liquid during a pH transition from an alkaline pH to a neutral pH are also presented, including minimizing the turbulence in the liquid solution and reducing the temperature of the liquid solution during the transition.

When a reaction liquid is passed through a gas-liquid separation pipe having a larger volume per unit length than the volume per unit length of a pipe, a headspace part into which gas can be released is formed above the gas-liquid separation pipe, and the byproduct gas generated by the reaction changes into bubbles, moves upward in the reaction liquid, and is continuously released from a gas-liquid interface into the headspace part. While the gas is removed in the gas-liquid separation pipe, the pressure of the headspace part is controlled so as to be constant by a pressure adjustment device.

An ultrasonic sensor for measuring the level of liquid in a vessel has an elongated tubular probe, a tube within the probe, and a transducer that converts electrical energy to ultrasonic energy mounted at or near one end of the tube to transmit ultrasonic energy along the probe longitudinal axis. A conical reflector that reflects ultrasonic energy is opposite the transducer ultrasonic energy emitting part to reflect ultrasonic energy received from the transducer upwardly in the probe to an air-liquid interface from which it is downwardly reflected to the conical reflector element that directs the energy reflected from the interface back to the transducer for conversion to an electrical signal that is used by an electronic module to measure the liquid level in the probe, which is the liquid level in the vessel, by measuring the round trip travel time of the ultrasonic signal energy.

Disclosed herein are systems and methods for using the controlled movement of magnetic particles using controlled magnetic fields in a fluidic device containing separated fluidic regions to detect analytes in solution by immunoassay, such as an enzyme-linked immunosorbant assay (ELISA) for various medical and scientific applications. In order to achieve sequential exposure to the different chemical environments required in an immunoassay, magnetic particles are driven through fluid-containing chambers separated by air-gaps that may take the form of air bubbles or small open-air separations, for example. Externally controlled magnets coupled to actuators draw the flow of magnetic particles through air-liquid interfaces produced by microfluidic surface tension at the air-gap, washing the particles.

A rotating device includes a fixed body having a base and a shaft, a hub, and a rotating body having a rotating-body-side encircling member fixed to the hub and encircling the shaft. A lubricant is present between the fixed body and the rotating body. The rotating-body-side encircling member and the shaft are each formed with a radial dynamic pressure generating groove. The fixed body includes a base-side encircling member having a disk part encircling the base-side portion of the shaft and a cylinder part encircling the rotating-body-side encircling member. The base-side encircling member has the disk part fixed to the shaft by interference fitting, and has the cylinder part fixed to the base. An air-liquid interface is located in a gap in the radial direction between the inner periphery of the cylinder part and the outer periphery of the rotating-body-side encircling member.

The invention discloses a preparation method of a silver nanowire / graphene polymer composite film and belongs to the field of chemistry. The preparation method comprises the following steps: (1) preparing graphene oxide aqueous solution colloid; (2) preparing silver nanowire / grapheme hybrid aqueous solution with certain concentration; (3) performing self-assembly on gas-liquid interface. With adoption of the preparation method, the ubiquitous defects in the preparation methods at present that a grapheme film is poor in characteristics and low in repeatability, and chemical reagents are polluted are overcome.

The invention belongs to the technical field of mass transfer reaction equipment, and particularly relates to mass transfer and reaction equipment for a reverse airflow shearing and rotating packed bed which solves the problems of the existing ultragravity equipment in the aspect of air phase mass transfer. The mass transfer and reaction equipment comprises a rotating bed main body, an equipment bracket and a transmission device, wherein the rotating bed main body comprises an upper part and a lower part which are an air collection chamber and a main cavity; the main cavity is internally provided with a packing rotor capable of rotating at a high speed; the upper part of the main cavity is connected with an air inlet pipe; the bottom of the main cavity is connected with a drainage pipe; the center of the packing rotor is provided with a liquid distributor; the liquid distributor is connected with a liquid inlet pipe; the top of the air collection chamber is connected with an exhaust pipe; an opening in the top of the packing rotor is communicated with the air collection chamber. The mass transfer and reaction equipment has the beneficial effects that the shearing stress for fluid can be increased, more momentum is transferred to interior fluid by packing, the boundary layer separation of air liquid is promoted, the degree of turbulence is increased, and the update rate of air liquid interface is increased, and thus the purpose of strengthening the air phase mass transfer is achieved; the operation stability is improved, and the equipment is suitable for high throughput occasions; the air collection chamber effectively inhibits the influences on operation balance caused by entrainment and flooding.

Provided is a shower apparatus which can stably supply bubbly water through all nozzle holes and can cause water droplets of large, uniform size to land continuously on the user so as to allow the user to enjoy a shower with a voluminous feel as if the user were being showered by large drops of rain. The shower apparatus includes a water supply unit, a throttle unit adapted to eject passing water downstream, an aeration unit adapted to produce bubbly water by aerating the water ejected through the throttle unit, and a nozzle unit provided with a plurality of nozzle holes used to discharge the bubbly water, wherein the throttle unit has a flat-shaped throttle channel and water ejected through the throttle channel plunges into an air-liquid interface as a sheet-like stream, thereby producing bubbly water, which is then discharged through the nozzle hole.

A method of monitoring an air atmosphere for a harmful biological or chemical agent includes providing a plurality of mammalian respiratory airway epithelial cells borne on a porous support; contacting the porous support with a cell nutrient medium and with air by positioning said porous support at an air-liquid interface between the cell nutrient liquid and the air; sampling the air atmosphere to thereby create an air flow over the air-liquid interface so that the respiratory epithelial cells borne on the porous silicone support are contacted by the sampled air; and monitoring the respiratory epithelial cells for at least one physiological parameter indicating the cells have been exposed to the harmful agent.

In order to prevent lubricating oil leak due to bubbles in thrust dynamic pressure bearing of herringbone grooves, stabilize the bearing performance, and enhance the reliability and durability, auxiliary grooves deeper than pump-in type herringbone grooves for generating dynamic pressure are provided, and the bearing inner periphery and bearing outer periphery are linked by a pressure gradient descending slowly, and therefore bubbles present in bearing inner periphery can be guided into the bearing outer periphery through auxiliary grooves, and discharged to outside of the bearing from the air-liquid interface, so that lubricating oil leak due to bubbles can be prevented.

A cassette is provided for installation in a dialysis monitor to pump a treatment solution through a dialyzer. The cassette is a unitary component with a hydraulic manifold (53) and a pneumatic manifold (54) integrated into a body (52). The body (52) has connectors for connecting the hydraulic manifold (53) to the dialyzer and the pneumatic manifold (54) to a pneumatic pressure source. A set of solution pumps is integrated in the cassette, and each solution pump includes a pump cavity inside the body. The solution pumps are operable to displace the treatment solution through the hydraulic manifold (53) to and / or from the dialyzer by action of a reciprocating gas-liquid interface in the pump cavity (30) of the respective solution pump. The gas-liquid interface is formed directly between a gaseous substance and the treatment solution. A valve arrangement (58) is attached to the body (52) and operable to control admission of the gaseous substance and the treatment solution to the pump cavity (30) so as to reciprocate the gas-liquid interface and thereby pump the treatment solution through the hydraulic manifold (53). The cassette is configured to pump the treatment solution without moving parts inside the body (52).

An ultrasonic sensor for measuring the level of liquid in a vessel has an elongated tubular probe, a tube within the probe, and a transducer that converts electrical energy to ultrasonic energy mounted at or near one end of the tube so as to transmit ultrasonic energy horizontally across the probe. An element having a surface that reflects ultrasonic energy is at an angle, preferably of about 45°, to the probe longitudinal axis opposite to an ultrasonic energy emitting part of the transducer to reflect ultrasonic energy received from the transducer upwardly in the probe to an air-liquid interface from which it is downwardly reflected to the angled reflector element that directs the energy reflected from the interface back to the transducer for conversion to an electrical signal that is used by an electronic module to measure the liquid level in the probe which is the liquid level in the vessel.

The invention provides a method for building a three-dimensional skin model. The method comprises the following steps: 1) preparing an extracellular matrix polymeric hydrogel solution; 2) mixing fibroblast and the extracellular matrix polymeric hydrogel solution, and culturing through a small culture chamber; and 3) inoculating cutin to form cells; performing air-liquid interface culture to obtain the three-dimensional skin model containing a corium layer, an epidermal layer and a cutin layer. The method is capable of effectively building the three-dimensional skin model; in addition, the preparation method is simple and convenient, and can be applied to the sieving of anti-inflammatory and anti-allergy skin drugs; and the method has a good application prospect.

A single- or multi-well chamber assembly comprising nanoparticle exposure chambers with a plurality of wells designed to hold porous membrane inserts, with cell culture media being maintained on the basal (lower) surface to generate the air-liquid interface. The wells may accommodate a variety of sizes of cell culture inserts and may be arranged radially. The chamber assembly comprises an integrated heating-humidifying mechanism so that the internal chamber environment may be heated to 37° C. and maintained at humid conditions to allow for maintenance of cell cultures. The presently disclosed apparatus may be used to investigate the toxicity of airborne nanoparticles to cells or tissue models grown at the air-liquid interface. Aerosolized nanomaterials are drawn into a multi-well chamber assembly and deposited via electrostatic deposition onto cells grown at the air-liquid interface.

The invention provides a method and a device for deodorizing a light oil product through dissolved oxygen. The method comprises the following steps of: mixing the light oil product and air in a mixer, and then adding the light oil product into a dissolved oxygen container, wherein excess air is exhausted through an air-liquid interface control system in the dissolved oxygen container; adding the light oil product into a fixed bed reactor, and contacting the light oil product with a fixed bed oxidation catalyst; collecting the fixed bed oxidation catalyst subjected to a deodorizing reaction. According to the method and the device, on one hand, the pressure of a reaction system can be well kept in a balanced state to enable liquid-stage fluid to uniformly flow in the reactor, and on the other hand, by the reaction of mercaptan and the dissolved oxygen in the light oil product in a homogeneous state, the deodorizing efficiency can be effectively improved, and an unnecessary oxidization side reaction is avoided or slowed, so that phenomena of color deepening and colloid over-generation caused by over-oxidization of the oil product are avoided, the service life of the catalyst is prolonged, the processing loss is reduced, and the yield of the light oil product is improved.

Methods of preventing air-liquid interfaces on the surface of a wafer in order to prevent the formation of particle defects on a wafer are presented. The air-liquid interfaces may be prevented by covering the entire surface of the wafer with liquid at all times during a cleaning process while the surface of the wafer is hydrophobic. Methods of preventing the formation of silica agglomerates in a liquid during a pH transition from an alkaline pH to a neutral pH are also presented, including minimizing the turbulence in the liquid solution and reducing the temperature of the liquid solution during the transition.

The preent invention relates to measurement and control technology. The end of single multiple-mode optical fiber is processed through electric arc smelting pull or optical grinding to form conic tipas sensing head, which is combined with computer controlled servo mechanism to realize the continuous liquid level measurement. The press invention features that the servo mechanism to drive the optical fiber sensing ehad consists of stepped motor, screw arbor, block and outer casing tube with guide groove; its motion direction to trace liquid surface is determined by the strength of the feedbacksignal from the sensing head and the liquid surface position is calculated from the step number of the stepped motor corresponding to the change in the feedback signal the sensing head produces whilepassing through the air-liquid interface. The method has a measurement precision within 0.1 mm in the 2 mm range, is not affected by the liquid density, has no long term drift, and may be used in thepetrochemical system.

The invention discloses a structure of a micro device in a microfluidic chip series. The structure comprises a gas channel and at least one liquid channel. The gas channel is communicated with the liquid channels through microchannels. The micro device is a micro piston and comprises a gas channel and a liquid channel, wherein one end of the gas channel is connected with gas, the other end of the gas channel is communicated with the middle segment of the liquid channel through a gradually-narrowed microchannel, and the two ends of the liquid channel are connected with liquid. The structure is controlled by a pressure digitized gas micro circuit in a chip, a gas phase and a liquid phase are isolated by micro holes, no movable component exists, no special breathable or elastic material is needed, and the pressure difference of the gas phase and the liquid phase is used for driving a gas-liquid interface so that the micro device can have the functions of pressure sensing, fluid passage opening and closing, effective power conveying of liquid and the like. One-time etching forming can be achieved on hard materials such as glass, and a large number of micro devices can be conveniently integrated with low cost.

The invention relates to a solar seawater desalination device based on gas-liquid interface heating and an application thereof. The device comprises a container for storing seawater, a heat-insulatingblock clamped on the inner wall of the container, a water absorbing material arranged on the heat-insulating block, a black light-absorbing material adsorbed on the water-absorbing material, and a water-absorbing mechanism for transporting seawater to the water-absorbing material. The device can improve the speed of solar seawater desalination.

A process of extracting liquid from a fabric having a first content of liquid includes the steps of creating a surfactant surface layer including at least one surfactant at an air-liquid interface of the liquid on the fabric, wherein the surface layer has a first surface tension, and adding at least one co-surfactant different from the surfactant. The surfactant and said co-surfactant have substantial chain length compatibility. The co-surfactant reduces the surface tension at the air-liquid interface. The fabric is then subjected to mechanical extraction for a period of time to reduce the liquid content of the fabric from the first content of liquid to a second liquid content.

Methods are provided for protecting against ventilation-induced lung injury both directly, by lowering surface tension, and indirectly, by promoting equitable liquid distribution in pulmonary alveolar edema, in which liquid- and air-filled alveoli are normally interspersed. Since a pressure barrier is responsible for trapping liquid in discrete edematous alveoli and the magnitude of the barrier is proportional to surface tension at the air-liquid interface, the present invention provides various means for promoting equitable redistribution of edema liquid amongst alveoli to help protect the lung during ventilation, including: i) use of an additive that lowers surface tension; ii) use of active, accelerated deflation during mechanical ventilation; and iii) high frequency (>50 Hz) vibration of the lung.

The invention relates to an air purifying device and a purifying method thereof. The invention is to solve the technical problem of durable, highly-efficient and high-throughput removal of PM2.5 fine floating dust particles and partial bacteria and viruses, belonging to the technical field of air purification. The air purifying device is characterized by comprising an air injection unit, a washing bath pool and a bubble crushing system immersed in the washing bath pool, wherein air injected by the air injection unit enters the working area of the bubble crushing system from the bottom part of the washing bath pool; bubbles continuously undergo the process of generation, growth, extrusion and crushing, regeneration, re-growth, and re-extrusion and re-crushing; and through repeated contacting of air and water interfaces, the purpose of repeated washing and purifying of the air is achieved. The air purifying device provided by the invention can clean various fine particles in the air by washing, dissolves or captures harmful and toxic gases, and has good purifying effect. The device provided by the invention has the advantages of convenient use, wide application range, and applicability to indoor home application and public spaces like industrial and mining enterprises, hospitals, and station and airport halls.

The invention relates to a tower type air stripping device for treating chlorinated hydrocarbon polluted underground water, which is a circular tower made of stainless steel. The circular tower is divided into three parts, namely an air inlet section, a two-stage spraying section and an air outlet conical cap, wherein the air inlet section and the air outlet conical cap are connected with a main tower with the two-stage spraying section through a flange structure with a rubber sealing ring. The tower type air stripping device has the advantages that: the air inlet section is provided with four titanium alloy microporous air distribution heads, and when air of an air compressor passes through the air inlet section at a high speed, a local vacuum state can be formed, so that the air is cut and scattered into fine air microbubbles and the air-liquid contact interface is greatly increased; meanwhile, the air-liquid contact area is increased through two rotary water distributors of the main tower and the filled stainless steel mesh ripple packing, so that the mass transfer effect of chlorinated hydrocarbon pollutants on the air-liquid interface is enhanced. The invention provides an ideal, economic and high-efficiency tower type air stripping remediation device with wide application prospect for chlorinated hydrocarbon polluted underground water remediation.

The invention discloses an early warning method, a control method and a system for a harmful flow type of an oil-gas collecting and conveying vertical pipe system. A normal submarine pipeline and a liquid plug forming mechanism at the bottom of a vertical pipe and liquid plug forming position parameters are adopted to carry out support vector machine training; then continuous rapid identificationis carried out on the overall flow type in the pipeline of at least three differential pressure signals on the collecting and conveying vertical pipe system, and a dimensionless mean value of the differential pressure signal is obtained; according to the rapid response of the flow changes through monitoring the formation of a long liquid plug in the submarine pipeline and the mean value of each differential pressure signal, so that the early warning of the instability of the gas-liquid interface and the liquid plug caused by the pipeline structure is realized, and the liquid plug forming positions, weather in the submarine pipeline and the bottom of the vertical pipe, can be correspondingly forecast, so that accurate judgment of the position of the liquid plug is realized; after the earlywarning is sent out, enough time is provided for the control device to respond, so that the formation of the harmful flow type can be avoided or the damage caused by the harmful flow type can be avoided; the method has the advantages that the early warning reliability is high, the false alarm rate is low, and the margin of the flow safety guarantee can be remarkably improved.