摘要:
A technique is presented for aligning, in a desired region within a flow chamber of a flow cell, a non-spherical biological entity carried in a sample. The flow chamber has a rectangular cross-section. A bottom flow input module, a top flow input module and a sample input module provide a viscoelastic first fluid, a second viscoelastic fluid, and the sample, respectively, to the flow chamber. The first and the second viscoelastic fluids laminarly flow along a bottom and a top wall of the flow chamber and the sample laminarly flows sandwiched between them. By controlling rate of flow of the first and/or the second viscoelastic fluids the sample flow, and thus the non-spherical biological entity, is focused in the desired region. A gradient of sheer within the sample flow set up due to the first and second viscoelastic fluids orients the non-spherical biological entity in the desired region.
摘要:
Provided is a biological sample imaging device and a biological sample imaging method that are capable of disposing a sufficient number of large-sized particles in a biological sample so as to be moderately dispersed within an imaging range. The biological sample imaging method includes: a first step of introducing a biological sample (104) containing particles into a liquid flow channel (40); a second step of causing the biological sample (104) introduced into the liquid flow channel (40) to flow in a forward direction; a third step of causing the biological sample (104) to flow in a reverse direction after the second step; and an imaging step of taking, in an imaging cell (14), images of the particles contained in the biological sample (104) that remains in the liquid flow channel (40) after the third step.
摘要:
A multi-stage dilution device, comprising a first stage dilution apparatus (A), and a second stage dilution apparatus (B), each of the stage dilution device comprising:-(i) a housing ( 1 ) having a diluent inlet ( 7 ); (ii) a sample inlet ( 2 ) having a sample introducer within the housing ( 1 ) adapted to introduce the sample at an introducer point ( 4 ) within the housing ( 1 ); and, (iii) a mixing conduit ( 5 ) mounted at least partially within the housing ( 1 ), the mixing conduit ( 5 ) having an inlet section comprising a mouth ( 10 ), and a fluid outlet ( 8 ), and a throat section ( 9 ) capable of producing a pressure drop within the mixing conduit ( 5 ), the pressure drop being sufficient to draw sample through the sample inlet ( 2 ); the introducer point ( 4 ) of the sample inlet ( 2 ) being proximate the mixing conduit inlet; and wherein the fluid output ( 8 ) of the first stage dilution apparatus (A) is in communication with the sample inlet ( 2 ) of the second stage dilution apparatus (B). A method of diluting a sample is also disclosed.
摘要:
A technology is provided, capable of reducing the time required for the flow velocity of a laminar flow to stabilize, and of providing more finely responsive control. The present technology provides a control apparatus for controlling a flow velocity of a laminar flow, the apparatus including: a pressurization unit configured to pressurize a fluid that is to form the laminar flow; an air pressure measurement unit configured to measure a pressure applied to the fluid by the pressurization unit; a water pressure measurement unit configured to measure a water pressure of the fluidpressurizedby the pressurization unit; and a control unit configured to control pressure force applied to the fluid by the pressurization unit on the basis of either the air pressure measured by the air pressure measurement unit or the water pressure measured by the water pressure measurement unit, wherein the control unit provides switching between control based on the air pressure measured by the air pressure measurement unit and control based on the water pressure measured by the water pressure measurement unit.
摘要:
A fluid handling and delivery system useful in generating a fluid stream (7) in the flow path (8) of microfluidic device (16). The system comprises a variable volume container (1) having a flexible wall (2) which acts on an amount of fluid (3) within the variable volume container (1) in response to an amount of pressure (4) exerted on the exterior surface (5) of the flexible wall (2) by an amount of gas (6). The amount of pressure (4) exerted on the exterior surface (5) of flexible wall (2) continuously adjusts the volume of the variable volume container (1) to act on the amount of fluid (3) to generate a fluid stream (7) in the flow path (8).
摘要:
Apparatus for sorting and orienting sperm cells has a pair or walls (314, 316) in confronting relationship forming a flow chamber (312) having an inlet, a downstream outlet, and intermediate detector region (338). The inlet receives first and second spaced apart streams of input fluid and a third stream of sample fluid (328) containing the cells (330) to be sorted. The first and second streams have respective flow rates relative to the third stream, such that the third stream is constricted forming a relatively narrow sample stream, so that the cells (330) are oriented parallel to the walls (314, 316). A detector (340) detects desired cells (330) and a sorter (356) downstream of the detector (340) sorts the desired cells (330) from the stream.
摘要:
Disclosed is a system that can mix deionized water and concentrated sheath fluid to provide sheath fluid in a flow cytometer system having a desired concentration. Flow rates are low, which substantially match the flow rate of sheath fluid through the nozzle, so that turbulence and air bubbles are not formed in the sheath fluid. The available deionized water is then used for back flushing and removal of sample cells and deposited salts from the sheath fluid.
摘要:
Provided is a microparticle measurement device that can deliver a liquid that is used in the analysis of microparticles in a stable manner. The microparticle measurement device includes a plurality of first tank units to which a liquid is supplied from the outside, and which are respectively connected in parallel, and a bulb unit that is connected to the plurality of first tank units, and which switches to a state in which it is possible to deliver the liquid to a flow channel through which microparticles flow. According to this microparticle measurement device, in addition to performing liquid delivery from a portion of first tank units, in which the replenishment of liquid has been completed, to a flow channel, it is possible to supply liquid from the outside to first tank units other than the first tank units that are delivering liquid.
摘要:
An apparatus for sorting and orienting sperm cells includes a pair of walls in confronting arrangement and forming a flow chamber having an inlet, a downstream outlet, and an intermediate detector region. The inlet receives first and second spaced apart streams of input fluid and a third stream of sample fluid containing the cells to be sorted. The first and second streams have respective flow rates relative to the third stream, such that the third stream is constricted, forming a relatively narrow sample stream, so that the cells are oriented parallel to the walls. A detector detects the desired cells and a sorter downstream of the detector, sorts the desired cells from the stream.
摘要:
A flow cytometer system, comprising a sample injection tube having an injection point through which a sample may be introduced, a sheath fluid container having a bottom end and wherein said sample injection tube is located within said sheath fluid container, a sheath fluid port connected to said sheath fluid container, a first axial motion surface in a nozzle, a second axial motion surface in said nozzle, a limited maximal acceleration differentiation transition area between said first axial motion surface in said nozzle and said second axial motion surface in said nozzle wherein said limited maximal acceleration differentiation transition area is coordinated with said sample so as to be affirmatively limited to not exceed the practical capabilities of said sample over its length and an analytical system which senses below said nozzle.