摘要:
Microfluidic devices are described that include a microfluidic channel, a first array of one or more magnets above the microfluidic channel, each magnet in the first array having a magnetic pole orientation opposite to a magnetic pole orientation of an adjacent magnet in the first array, and a second array of one or more magnets beneath the microfluidic channel, each magnet in the second array having a magnetic pole orientation opposite to a magnetic pole orientation of an adjacent magnet in the second array. The first array is aligned with respect to the second array such that magnetic fields emitted by the first array and second array generate a magnetic flux gradient profile extending through the channel. An absolute value of the profile includes a first maximum and a second maximum that bound a local minimum. The local minimum is located within the microfluidic channel or less than 5 mm away from a wall of the microfluidic channel. Methods of using the new devices are also described.
摘要:
An apparatus for detecting an object capable of emitting light. The apparatus comprises a light detector (11) comprising at least two optical sensors (111, 112) capable of determining the intensity of the light; and a computer (12) processing output signal generated by the optical sensors and comparing a result of the processing with a known result corresponding to a known type to determine whether the object belongs to the known type.
摘要:
An object moving device includes: a first drive mechanism configured to move a head unit in a first direction and in a second direction that is orthogonal to the first direction in a horizontal direction; a second drive mechanism configured to move an illumination unit in the first direction; a third drive mechanism configured to move a camera unit in the first direction; and a control unit configured to control operations of the first, second, and third drive mechanisms. The control unit controls the first drive mechanism to move the head unit on a first path along a movement line. The control unit controls the second and third drive mechanisms to move the illumination unit and the camera unit on the first path between the first container and the second container. When the head unit and the illumination unit interfere with each other on the first path, the control unit implements control such that the head unit moves in the second direction and the head units moves in the first direction on a second path parallel to the first path.
摘要:
A method for reconstituting, washing or treating a cell preparation is described. The method comprises: (a) placing a cell preparation within a first chamber (12, 72, 86); (b) flowing the cell preparation from the first chamber into a second chamber (26, 76, 88) wherein the second chamber is adapted to be repeatedly and removably connected to and placed in fluid communication with the first chamber and wherein one of the first and second chambers further comprises a port (28, 92) having a resealable valve (40) and the other of the first and second chambers further comprises a port (22) having a member (36) adapted to open the valve when the chambers are connected; and (c) disconnecting the second chamber from the first chamber and closing the valve.
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:
The present invention provides a method for analysing levels of markers of subpopulations of vesicles in a sample comprising a heterogeneous population of said vesicles, the method comprising a) contacting said sample with a set of at least two capture agents, marker of said vesicles; thereby capturing at least two subpopulations of said vesicles, b) contacting the captured at least two subpopulations of vesicles with at least two different detection agents, thereby labeling at least two markers of said at least two subpopulations of said vesicles inversely with said at least two capture agents and at least two detection agents, thereby generating an at least 2x2 matrix of signal intensities, and c) determining the levels of said at least two markers of said at least two subpopulations of said vesicles, wherein said levels of said at least two markers of subpopulations of said vesicles are determined relative to each other.
摘要:
Analogs of ShK toxin and methods for using such ShK analogs. The ShK analogs generally comprise ShK toxin attached to a chemical entity (e.g. an atom, molecule, group, residue, compound, moiety, etc.) that has an anionic charge. In some embodiments the chemical entity attached to the ShK toxin may comprise an amino acid residue. The ShK analogs may be administered to human or non-human animal subjects to cause inhibition of potassium channels or to otherwise treat diseases or disorders. In some embodiments, the chemical entity to which the ShK toxin is attached may be chosen to provide selective inhibition of certain potassium channels (e.g., Kv1.3 channels) over other potassium channels (e.g., Kv1.1 channels). In come embodiments, the chemical entity to which the ShK toxin is attached may include a fluorophore, thereby providing a fluorophore tagged ShK analog. Such fluorophore tagged ShK analogs may be used in flow cytometry alone, or in conjunction with class II tetramers that can detect autoreactive cells.