96 results about "Flow through cell" patented technology

An energy dissipative element (24) protects hard disk drives (22, 72, 92) from shocks and vibrations. A closed elastic envelope (48) houses a body of open cell foam (54), a volume of viscous liquid (56), and a compressible gas (64). Under compression or expansion of the foam (54), viscous liquid (56) flows through cell orifices and thereby dissipates energy resulting from external force applied against the elastic wall (48). The energy dissipative elements (24) are applied between a disk drive housing (22) and an outer case (26) to create a ruggedized portable disk drive module (20).

In biology and biotechnology, electroporation is an important technique for introducing entities (DNA, RNAi, peptides, proteins, antibodies, genes, small molecules, nanoparticles, etc.) into cells. Applications range widely from genetic engineering to regenerative medicine to drug delivery. It has been demonstrated that the electrical currents flowing through cells can be used to monitor and control the process of electroporation for biological and artificial cells. In this application, a device and system are disclosed which allow precise monitoring and controlling electroporation of cells and cell layers, with examples shown using adherent cells grown on porous membranes.

A series of multi-dimensional acoustic standing waves is set up inside a growth volume of a bioreactor. The acoustic standing waves are used to hold a cell culture in place as a nutrient fluid stream flows through the cell culture. Biomolecules produced by the cell culture are collected by the nutrient fluid stream and separated downstream of the cell culture.

An energy dissipative element (24) protects hard disk drives (22, 72, 92) from shocks and vibrations. A closed elastic envelope (48) houses a body of open cell foam (54), a volume of viscous liquid (56), and a compressible gas (64). Under compression or expansion of the foam (54), viscous liquid (56) flows through cell orifices and thereby dissipates energy resulting from external force applied against the elastic wall (48). The energy dissipative elements (24) are applied between a disk drive housing (22) and an outer case (26) to create a ruggedized portable disk drive module (20).

The present invention provides a method, a system or device system for examining medicine component on-line in the process of pharmacy. The present method employs electric controller, dynamic dilution mixed system and mini-type ultraviolet / visible light spectrometer to examine chemistry component. The device system main comprises valve control technique, multi-streaming precise proportional dilution technique and spectrum measuring technique. The detecting device comprises valve controller, electric controller, precision variable peristalsis pump, precision dynamic mixed device, dynamic flow-through cell, multi-join sampling pipeline and precision UV-VIS fiber spectrum detector. The detecting device on-line detects the medicine component or Chinese traditional medicine active component on-line automatically in the process of pharmacy, and provides gist for pharmacy process control and efficiency direction.

A fast light off flow-through ceramic substrate is provided that is particularly adapted for use as a catalytic converter. The substrate is formed from a body of ceramic material having axially opposing inlet and outlet ends for receiving and expelling the flow of automotive exhaust gas, respectively. The body contains a network of walls coated with a catalyst that define axially-oriented flow-through cell channels. The average thermal mass (ATM1) of a first axial region of the walls adjacent to the inlet end is at least 20% less than the average thermal mass (ATMTOT) of all of the walls. The lower average thermal mass of the walls in the first region advantageously shortens the light off time for the catalyst within the substrate to effectively neutralize automotive pollutants. The reduction of the average thermal mass in only the first axial region of the walls advantageously maintains the strength of the resulting body of ceramic material, and further increases the cool down time of the body.

A protection circuit couples to and protects a battery cell. The protection circuit generally limits the current that can flow through cell when the voltage across the cell falls to a predetermined minimum threshold, such as might occur if the cell is passivated, fails in service, or is reaching the end of its useful life. The protection circuit preferably includes a transistor, which couples in series with the cell and limits the current therethrough. By limiting the current through the cell when its voltage reaches a minimum threshold, the voltage on the cell will not fall below the minimum safe level. A bypass means (e.g., a diode) also is included to conduct current around the cell when its current has been limited by the transistor.

Present refers to a portable liquid chromatograph. It contains injector pump, sampling valve, optical fiber type ultraviolet-visible absorbing / fluorescence two-purpose flow-through cell and optical fiber assembly, capillary integral post, grating spectrograph, photodiode light source, computer, waste liquid bottle and power supply.

An apparatus for retaining magnetic particles within a segment of a flow-through cell during flow of a fluid through the cell comprises (a) optionally, an electrical current source; (b) an electromagnet having a winding connected to the current source and an air gap between at least one pair of poles each of which has a corrugated outer surface and (c) a flow-through cell which is configured and dimensioned to receive an amount of magnetic particles to be retained within the flow-through cell and to allow flow of a liquid through the flow-through cell. The liquid carries molecules or particles to be captured by means of the magnetic particles. A portion of the flow-through cell is inserted in air gap.

The invention relates to a flow injection ammonia nitrogen color matching detection method, belonging to analytical chemistry technical field, which comprises injecting release solution as dilute NaOH solution into a capillary pipeline system connected with a gas liquid separator, injecting quantitative water sample to flow and circulate along with the release liquid in the capillary pipeline system, releasing ammonia from the water sample at the deep groove of the gas liquid separator and penetrate a ventilated membrane to be absorbed by acid-base indicator receive solution of more acid in another capillary groove at another side of the membrane, to change the color of the acid-base indicator, and feeding the receive solution absorbed with ammonia into a flow-through cell of a chromometer, using the photoelectric colorimeter to test the change of translucent photoelectric voltage and calculating out the ammonia nitrogen density of the sample water. The invention further provides a relative device. The invention can realize online detection of ammonia and nitrogen contents of water or solution quickly and simply, with accurate and reliable detected data, which only needs 50ul-1ml water sample injected in one time, low agent consumption, low cost and safe agents.

Present invention refers to integrated ultraviolet-visible absorbing / fluorescence two-purpose flow-through cell, referring to liquid chromatograph detector. It includes cell body, light guide quartz capillary, polyetheretherketone liner tube, self-focusing lens, seal washer, gasket, optical fiber and liquid flow path pipeline. Said Light guide quartz capillary is set in polyetheretherketone liner tube and filled in pipe cavity of cell body, self-focusing lens set in light entry direction fixed and sealed with cell body by seal washer, gasket located between self-focusing lens and polyetheretherketone liner tube, gasket notch aligned flow path direction to fill excess space, entry optical fiber, outlet optical fiber and in and out liquid pipe respectively fixed in cell body by joint and sleeve chuck to form sealed flow path.

The invention discloses a full-automatic analyzer of a water soluble sulfide compound and an analysis method. The full-automatic analyzer comprises a sample pretreatment device and a chromogenic detection device, wherein the sample pretreatment device comprises an autoinjection device, a first peristaltic pump, a distillation reagent container, a first triple valve, a first line heat module, an on-line distillation module and an on-line degasser; and the chromogenic detection device comprises a second peristaltic pump, a current carrying bottle, a developer bottle, a ferric chloride solution bottle, a sampling ring, a six-way valve, a second backpressure regulator, a second triple valve, a first knotted reactor, a third triple valve, a second line heat module, a flow-through cell, a detector, a waste liquid bottle, a data connection cable, a computer processing system and a first backpressure regulator. The invention also discloses an analysis method of the water soluble sulfide compound. According to the full-automatic analyzer of the water soluble sulfide and the analysis method, samples can be continuously and automatically tested with the detection limit being 1 microgram / L, and the test is accurate and rapid.

An energy dissipative element protects hard disk drives from shocks and vibrations. A closed elastic envelope houses a body of open cell foam, a volume of viscous liquid, and a compressible gas. Under compression or expansion of the foam, viscous liquid flows through cell orifices and thereby dissipates energy resulting from external force applied against the elastic wall. The energy dissipative elements are applied between a disk drive housing and an outer case to create a ruggedized portable disk drive module.

The invention relates to a surface plasma resonance device for observing and detecting the biomolecular reaction in real time based on laser scanning confocal microscopic system. The device is configured in such a manner that a sample stage is provided with 3-dimensional manually-adjustable mechanism, a hemispherical prism as the surface plasma resonance core part is arranged on the sample stage, a constant-temperature flow through cell of which the pipe is connected with an injection pump is disposed under the hemispherical prism; the sample stage is placed on the position where the objective table of an inverted laser scanning confocal imaging microscope is arranged; an electrically-controlled angle adjusting device comprises a turntable platform controlled by a step motor and mechanical arms on the turntable platform; one mechanical arm is provided with a laser for generating surface plasma resonance, a beam-expanding mirror assembly, and a polarizer, which are arranged sequentially along the light path direction of the exit light, and the other mechanical arm is provided with a focusing lens and a silicon photodiode which are arranged sequentially along the light path direction of the reflected light; the silicon photodiode and a phase-locking amplifier are connected via data line, and the phase-locking amplifier is connected with a data acquisition and processing system which is connected with the controller of the injection pump.

The invention relates to a method of producing a 3-D microscope flow-through cell, consisting of an upper and a lower substrate between which is located a flow channel, an electrode structure penetrating the flow channel and connected with external contacts and with through-connections at the ends of the flow channel for the connection of fluid inlets and outlets. The invention provides a method of producing 3-D microscope micro flow-through cells that are suitable for the reversible assembly of microscope flow-through cells for the mum-volume range. According to the invention, this is obtained in that a base substrate is first provided with access holes and a flow channel, the flow channel being made of a sandwich of a material non-elastic inside and elastic outside, in that the flow channel for the purpose of a fluid-tight channel closure, is pressed against a second cover glass in order to provide a reversibly sealable flow channel.

The invention is a method and device for determining dissolution of a solid compound within the oral cavity. The device models dissolution within the oral cavity with a flow-through cell containing a solid compound and physiological amounts of simulated saliva. The device supplies and removes the simulated saliva at rates similar to production and loss of saliva within the oral cavity. The simulated saliva interaction with the solid compound mimics saliva interaction with a solid compound within the oral cavity. Dissolution of solid compound is determined from simulated saliva collected from the flow-through cell outflow.

A fast light off flow-through ceramic substrate is provided that is particularly adapted for use as a catalytic converter. The substrate is formed from a body of ceramic material having axially opposing inlet and outlet ends for receiving and expelling the flow of automotive exhaust gas, respectively. The body contains a network of walls coated with a catalyst that define axially-oriented flow-through cell channels. The average thermal mass (ATM1) of a first axial region of the walls adjacent to the inlet end is at least 20% less than the average thermal mass (ATMTOT) of all of the walls. The lower average thermal mass of the walls in the first region advantageously shortens the light off time for the catalyst within the substrate to effectively neutralize automotive pollutants. The reduction of the average thermal mass in only the first axial region of the walls advantageously maintains the strength of the resulting body of ceramic material, and further increases the cool down time of the body.

A modified microbial fuel cell with a halogen salt or salt water oxidizer. The fuel cell is a batch cell, but flow-through cell embodiments are also envisioned. The cathode and anode are separated by a cation exchange membrane or saline bridge. The anode contains microorganisms in media or various water bed sediments. The cathode contains water and a halogenated salt oxidizer. The fuel cells operated continuously for over 3 months, providing approximately 10 times more power than those in the current literature for batch cells.

Fluid-based particle detection exhibits improved light collection and image quality from a light collection system that uses immersed optics on a flow-through cell for collecting and detecting scattered light from particles carried by the fluid. The flow-through cell includes first and second body sections that are coupled to form a unitary article and have opposed interior surface portions configured to form opposed walls of a flow channel through which the fluid flows. First and second optical elements are associated with the respective first and second body sections. In certain embodiments, at least one of the first and second optical elements is an integral part of its associated body section. A lens element constructed as an integral part of the unitary flow-through cell eliminates additional interfaces or bonding joints that cause scattering and absorption of light.

A flow through cell (100) for use in a spectrophotometer for analysis of dissolved chemical substances in a flowing liquid stream is made up of at least an intermediate body member (114) located between two other body members (112, 116). The body members are of regular shape, for example rectangular parallelepiped and are clamped together, for example by machine screws (134, 136). Thus the cell is relatively easily manufacturable. The clamped together body members define a flow through passage which includes a hole (118) through the intermediate body member (114) and a liquid inlet region at one end of the hole and a liquid outlet region at the other end of the hole, which regions may be provided by galleries (150, 152) in scaling gaskets (130, 132) between the body members. The two other body members each include an optically transparent window (142, 146) at an end of the hole (118) thereby providing an optical pathway (A, A′) through part of the flow through passage. The liquid inlet and outlet regions at the ends of hole (118) are such that the liquid flow on entering and leaving the optical pathway (A, A′) occurs adjacent the optical windows transversely of the flow along the optical pathway. Thus the liquid flow sweeps across the optical windows (142, 146) and flushes the hole (118) of the optical pathway by successive increments of the liquid with minimal mixing.

In one embodiment, the present invention is directed to a pulsed electrochemical detection method comprising (a) flowing a liquid sample stream including at least one analyte past a working electrode in a flow-through cell; (b) applying at least three pulsed electrical potentials to the working electrode, (1) a first conditioning potential, (2) a second detection and oxidative cleaning potential, and (3) a third reductive cleaning potential, said second potential being higher than said first and third potentials and said first potential being higher than said third potential; and (c) detecting the output from said working electrode during the time period of applying said second potential.

The invention discloses a wavelength modulation surface plasmon resonance detector based on laser confocal imaging. The detector comprises a rectangular prism (1), a substrate (2) with one surface plated with a reflective film, a constant temperature flow-through cell (3), optical path mechanism (4), syringe pump (5), inversion laser scan confocal microscope (6), a spectrometer (7) and a processing system (8). The optical path mechanism (4) comprises a white light source (41), a light beam shaping mirror set (42), a polarizer (43), a focusing lens (44) and a fiber receiving head (45). The white light source (41), the light beam shaping mirror set (42) and the polarizer (43) are successively arranged on an optical path along incident light. The focusing lens (44) and the fiber receiving head (45) are successively arranged on an optical path along emitting light. The detector has low cost and wide scope of application, and is simple operated and convenient for usage. The detector can detect refractive index change reaching 2*10<-5> and has detection sensitivity reaching 10-11g / ml and image resolution reaching 2 mum.

Provided is a flow cell that is free from liquid leakage and excels in chemical resistance. There is provided a preferred form of flow cell comprising flat-plate glass substrate (3); adherent fluororesin sheet (5) having a groove as flow channel (7) made by cutting machining; and glass substrate (1) as lid member furnished with through-holes (9,11) as fluid inlet and outlet at positions corresponding to both end portions of the groove. The fluororesin sheet (5) is interposed between the glass substrates (1,3) and, while heating at a temperature not lower than the melting point of the fluororesin sheet (5), pressurized so that the glass substrates (1,3) are bonded together by the fluororesin sheet (5) per se. Flow channel member (17) is constructed by the glass substrate (3) and, bonded thereonto, the fluororesin sheet (5).

The invention discloses a determination device of hexavalent chromium in a water sample based on a microfluidic reaction system. The device of the invention comprises a sampling device, a reaction device and a detection device which are connected in order. The sampling device comprises a peristaltic pump and two injectors respectively communicated with the reaction device. The reaction device comprises a micro-fluidic chip, a defoaming device and a connecting pipe. The micro-fluidic chip is connected to a flow-through cell in the detection device. The detection device comprises the flow-through cell, a light source, a portable spectrometer, a light through hole and a waste liquid bottle. Light emitted from the light source and a light inlet hole and a light outlet hole of the flow-through cell are on a straight line. Meanwhile, the invention also provides a determination device of hexavalent chromium in a water sample based on the microfluidic reaction system. Detection operation is simplified, use of experiment reagents is reduced, and measurement time is shortened.

The invention discloses a liquid core waveguide flow-through cell for a UV spectrophotometric detector. The flow-through cell comprises a shell, and a pair of interface components with the same structure. The two interface components are assembled symmetrically on both sides of the shell, the shell is provided inside with a liquid core waveguide, and two ends of the liquid core waveguide are respectively connected to the interface components through cone press rings. The present invention employs liquid core waveguide total emission absorption optical path design to reduce the optical attenuation, improve the sensitivity of the UV spectrophotometric detector, extend the detection range of detector and greatly enhance the practicality of the detector.

The invention discloses a photometric method based boat-carrying pH and pCO2 measuring device and measuring method. The measuring device comprises a pretreatment apparatus and a measuring apparatus. The pretreatment apparatus comprises a submerged pump, a seawater collecting pipeline, a seawater discharging pipeline, a seawater sample tank, a filter head, and a first thermostatic water bath. The measuring apparatus comprises a seawater sample injection pipeline, an indicator bag, an indicator sample injection pipeline, a three-way valve, a peristaltic pump, a mixer, a Teflon AF2400 pipeline, a flow-through cell, a waste discharging pipeline, a miniature deuterium-tungsten halogen lamp, a spectrometer, an air thermotank, and a second thermostatic water bath. The provided measuring device can be used to measuring seawater pH and pCO2. In the prior art, the measurement on the sea carbonate system is complicated and tedious, the power consumption cost is high, and the provided device can solve the problem. Furthermore, the measuring device uses the photometric method, thus the measurement precision is high, and the measuring device can be widely applied to sensors.

The invention discloses a sailing multi-channel membrane filtration suspended particle sampling system, relates to a suspended particle sampling device, and provides a sailing multi-channel membrane filtration suspended particle sampling system which can automatically perform operations of cleaning a system, extracting and conveying an original water sample, filtering the water sample quantitatively, collecting suspended particle samples and the like and achieve sailing continuous collection of the suspended particle samples. The system is provided with a water sampling pump, a flow-through cell, prefiltrating equipment, a constant flow pump, a shunt valve, a multi-channel switching valve, multi-channel filtrating equipment, a vacuum system, a control system and a computer. A water outlet of the water sampling pump is connected with one end of the flow-through cell, and the other end of the flow-through cell is provided with an overflow port; and the prefiltrating equipment is arranged in the flow-through cell, an outlet of the prefiltrating equipment is connected with a water sample inlet of the constant flow pump, an outlet of the constant flow pump is connected with an inlet of the shunt valve and a filling opening of the multi-channel switching valve, a discharging opening of the multi-channel switching valve is connected with the filtrating equipment, the multi-channel switching valve is connected with the computer, and an outlet of the filtrating equipment is connected with the vacuum system.

There is disclosed a flow-through cell comprising a substrate defining a channel, having an inlet and an outlet, at least a portion of the substrate being light-permeable to allow particles within at least a portion of the channel between the inlet and the outlet to be optically detected through the substrate, wherein the flow-through cell comprises liquid-permeable particle retaining means located downstream of the at least a portion of the channel where particles can be optically detected, for allowing the flow of a liquid sample through the channel from the inlet to the outlet while retaining particles from the liquid sample whose dimensions exceed threshold dimensions within the channel, where they can be optically detected. The flow-through cell is particularly applicable to the detection of micro-organisms in drinking water.