摘要:
A micro pump is made compact and can prevent members constituting the micro pump from being chemically reacted with a working fluid, and a method of producing the same. After each of substrates constituting the micro pump is formed by a member containing a silicone as a main composition and a plurality of metal membranes are formed on a whole of a bonding surface of each of the substrates so as to form bonding surfaces, the bonding surfaces are cleaned, and the bonding surfaces are opposed to each other under a vacuum condition, overlapped, heated and pressed so as to be bonded. The valve portion has a beam and a protrusion for sealing as provided in the valve side, whereby a pressure applied to the protrusion becomes smaller than the bonding pressure.
摘要:
A water quality meter is composed of a plurality of analyzing units for analyzing water samples introduced from a water distribution pipe, each analyzing unit including a reagent mixing cell and a measuring cell, and a liquid introducing unit integrated with the analyzing units, which is composed of a single member in which a plurality of fluid flows paths for feeding various types of liquid including the water sample into the analyzing unit are formed. Furthermore, the cells and the plurality of three-dimensional fluid flow paths formed in the single member are fabricated by a micro-fabrication technique using photo-curing resin. In one embodiment, a photometer is situated in the flow path in at least one analyzing unit for measuring absorbency of the liquid. In another embodiment, a pair of electrodes, for measuring electric conductivity or pH, is disposed in a measurement flow path in at least one of the analyzing units.
摘要:
A pipetter capable of mixing liquids and dispensing the mixed liquid has a pipetting tube, an actuating device connected to the tube for sucking liquid into and discharging liquid from the tube, and a flow disturbance device in the tube spaced from the discharge and suction end thereof and adapted to cause longitudinal mixing of liquid in the tube when liquid is moved along the tube in at least one direction. Mixing is effected in the tube by causing a liquid body to move repeatedly to and fro along the tube so that during each such movement at least a portion of the liquid body passes the flow disturbance device and the liquid body is not discharged from the first end of the tube. The pipetter is useful for example in mixing a suspension of blood cells with a reagent prior to analysis.
摘要:
A water quality meter is composed of a plurality of water quality monitoring meters including analyzing units for analyzing water samples introduced from a water distribution pipe, each analyzing unit analyzing the water samples and a measuring cell, and a liquid introducing unit integrated with the analyzing units, which is composed of a single member in which a plurality of fluid flow paths for feeding various types of liquid including the water sample into the analyzing unit are formed. Furthermore, the cells and the plurality of three-dimensional fluid flow paths formed in the single member are fabricated by a micro-fabrication technique using photo-curing resin.
摘要:
Particles contained in a liquid sample are analyzed by moving the particles along a detection passage past a detector using a liquid flow in the detection passage. To reduce the time required for analysis of each sample, the sample is delivered at an input location at the upstream end of the detection passage by movement of a movable container carrying the sample to the input location. Immediately after the commencement of the delivery of the liquid sample, liquid flow is caused to occur in the detection passage. Washing liquid is supplied to the input location by a liquid supplier different from the movable container which carries the sample.
摘要:
A flow cell apparatus, useful in an apparatus for measuring particles suspended in a liquid, comprises a sample liquid, supply device, a sheath liquid supply device, a flow cell which has a flow passage passing through a transparent measuring portion, and a nozzle for causing the sample liquid, from the supply device to flow in the flow passage of the flow cell. The nozzle has at least one discharge port which is disposed in the flow passage in a spaced relation from the inner wall of the flow cell flow passage. The sheath liquid supply device causes the sheath liquid to flow around the nozzle discharge port and surround the sample liquid flow to form a sheath flow. The flow passage of the flow cell and the nozzle are so formed as to ensure a sample liquid flow of a fixed width through the measuring portion. A stable sample flow having a fixed width can be formed in the measuring portion even when the flow is at a high velocity, and particles in the sample liquid can efficiently be photographed with high accuracy.
摘要:
A photoanalysis apparatus includes marker pouring device for pouring markers into one of sheath fluid and fluid carrying particles in a flow-cell device, second optical device for applying a light beam for correction to the markers in the flow-cell device to measure strength of fluorescence or light scattering caused by said markers to generate a signal for correction, second signal processing device for calculating from the signal for correction at least one of a difference in position between a center of the fluid carrying particles in the flow-cell device and a center of a light beam for examination and a difference in flow rate between a predetermined flow rate and an actual flow rate of the fluid carrying particles in the flow-cell device to generate correspondingly at least one of a first command signal for position correction and a second command signal for flow rate correction, and correspondingly at least one of first correcting device for shifting the center of the light beam for examination to the center of the flow of the fluid carrying particles in accordance with the first command signal and second correcting device for correcting the flow rate of the fluid carrying particles to the predetermined flow rate in accordance with the second command signal.
摘要:
This invention relates to an apparatus for analyzing cells in a biological liquid sample, such as blood, in which apparatus a flow passage in a sample pretreatment system can be shortened with a simple construction. A sample metering chamber, a mixing chamber and a measurement liquid extracting chamber are formed in a rotary sliding member of a pretreatment portion. The rotary sliding member is intermittently rotated so as to shift a sample from one chamber to another to perform a necessary treatment. Fluorescence or scattering light with respect to the sample, mixed with a reagent in the pretreatment portion, is detected by a flow cell.
摘要:
In order to investigate particles in a fluid, a flow cell causes the fluid to flow past a sensor which receives light from a continuous light emission system. When the sensor detects a change in light, a particle detector is triggered, which in turn triggers a pulse generator and hence an intermittent light emission system. Light then illuminates the flow cell to allow a CCD camera to photograph the particle. The photographs taken by the CCD camera are analyzed by an image processor. In order to obtain an accurate particle concentration measurement, it is necessary to modify the initial concentration measurement derived from the analysis of particle images by the image processor by a compensation coefficient. This operation is carried out by a concentration compensator. The result may then be displayed. Additional analysis may be carried out by changing the magnification of the CCD camera, or by selecting for analysis only those particles of a selected size or type.
摘要:
A sheath flow type flow-cell device for photo-particle-analyzer comprises a substantially flat top surface, at least one first inlet for sheath fluid, at least one first flow passage communicated with the at least one first inlet and contracted toward downstream to be a straight capillary flow passage, a discharge port provided at a terminal end of the straight capillary flow passage, a second inlet for sample fluid, a second flow passage for sample fluid communicated with the second inlet and contracted toward downstream, and coupling portions for sealingly coupling with the particle photo-analyzer. The second flow passage is opened within the at least one first flow passage so as to keep a part of the at least one first flow passage above and below an opening of the second flow passage. The opening is faced in the same direction as the straight capillary flow passage. A wall portion on which the opening locates is rounded. The wall portion is further chamfered and a pair of projections are extended from the wall portion.