摘要:
A system for controlling the flow rate into a chromatographic column is disclosed generally comprising communicating a fluid to the column through a transfer line, measuring the transfer line inlet pressure, determining the transfer line outlet pressure, and adjusting the applied pressure until the inlet and outlet pressures produce a desired flow rate for the transfer line outlet. In certain embodiments, the applied pressure is adjusted by controlling a proportional valve. In some embodiments, the outlet pressure is determined by measuring the pressure difference across the transfer line and calculating the transfer line outlet pressure from the measured inlet pressure and the pressure difference.
摘要:
A system for pre-concentrating analytes in a sample prior to introduction into a chromatographic column is generally disclosed comprising a housing, an adsorbent disposed in the housing, and first and second conduits having an inlet and an outlet, respectively, for transferring fluid out of and into the housing during adsorption/dry purge and desorption stages, respectively. In some embodiments, the inlet of the first conduit and the outlet of the second conduit are both disposed in one end of the housing and are offset from each other with respect to the adsorbent.
摘要:
Disclosed are systems and methods that include a sampling device, a chromatographic column, and a transfer line through which a fluid containing analytes to be measured are communicated from the sampling device to the column. The pressure at which the fluid containing the analytes is applied at the inlet of the transfer line is adjusted as the temperature of the column increases in accordance with certain relationships in order to maintain a substantially constant flow rate or velocity for the fluid exiting the column. In this way, the system compensates for changes in the viscosity of the fluid flowing through the column that result from changes in the column temperature.
摘要:
Disclosed are systems and methods that include a sampling device, a chromatographic column, and a transfer line through which a fluid containing analytes to be measured are communicated from the sampling device to the column. The pressure at which the fluid containing the analytes is applied at the inlet of the transfer line is adjusted as the temperature of the column increases in accordance with certain relationships in order to maintain a substantially constant flow rate or velocity for the fluid exiting the column. In this way, the system compensates for changes in the viscosity of the fluid flowing through the column that result from changes in the column temperature.
摘要:
A pressure regulator (100) is provided. The pressure regulator (100) includes various features that reduce the risk of internal leaking. The pressure regulator (100) includes a regulator body (101) including a fluid inlet (107) with a valve seat (106) and a fluid outlet (108) and a cap (102) coupled to the regulator body (101). The pressure regulator (100) also includes a diaphragm (103) with a first side (103a) exposed to the fluid inlet (107) and the fluid outlet (108) and a second side (103b) exposed to the cap (102). The diaphragm (103) can frictionally engage the regulator body (101) to form a fluid tight seal. Additionally, the diaphragm (103) may include a socket (118) formed in the diaphragm (103) and a valve member (105) including a valve stem (110) with a ball (118) that is adapted to engage the socket (118) formed in the diaphragm (103) in order to couple the valve member (105) to the diaphragm (103).
摘要:
Disclosed is a method of processing data pertaining to a medical procedure. The method includes receiving information indicative of at least one of an imaging device and a video capture device, and information indicative of an identity of a patient to be treated during the medical procedure. The data is received by the computer system without the identity of the patient. A relationship is established to link the data with the identification of the patient. Application of at least one processing rule is initiated to reduce a file size of the data from an original file size of the data as transmitted by the at least one of the imaging device and the video capture device. The data is stored in combination with the identification of the patient in a manner compliant with a standardized medical imaging transmission format.
摘要:
Heterogeneous assays for different analytes in a single biological sample are performed simultaneously in a multiplexed assay that combines flow cytometry with the use of magnetic particles as the solid phase and yields an individual result for each analyte. The particles are distinguishable from each other by characteristics that permit them to be differentiated into groups, each group carrying an assay reagent bonded to the particle surface that is distinct from the assay reagents of particles in other groups. The magnetic particles facilitate separation of the solid and liquid phases, permitting the assays to be performed by automated equipment. Assays are also disclosed for the simultaneous detection of antibodies of different classes and a common antigen specificity or of a common class and different antigen specificities. Each type is accomplished by immunological binding at the surfaces of two distinct solid phases in a sequential manner with dissociation of the binding and washing of the solid phase in between the binding steps.
摘要:
A new and improved single tool or jig which is universally useable in connection with the fabrication or trimming of left and right side edge portions of stair tread components, left and right end portions of stair tread side edge plank components, and stair riser components, so as to permit all of such components to be properly mated together in order to impart to the exposed or open stair members a seamless finished appearance.
摘要:
A new and improved semi-automatic machine, for forming slits within side wall members of a packaging structure so as to render successive sections of the packaging structure articulated with respect to each other whereby the packaging structure can be folded into a packaging container, includes a pair of oppositely disposed circular saw blade assemblies which are disposed at a cutting station and which are mounted upon a vertically movable reciprocating carriage mechanism. The carriage mechanism is initially disposed at a first ELEVATED INOPERATIVE position, the packaging structure is fed into the machine and stopped at a predetermined longitudinal position at which it is desired to cut or slit the packaging structure, and the carriage mechanism is moved vertically downwardly toward a second LOWERED OPERATIVE position at which the pair of circular saw blades cut the oppositely disposed dependent side wall members of the packaging structure. Subsequently, the circular saw blade assemblies are retracted vertically upwardly as a result of moving the carriage mechanism back to the first ELEVATED INOPERATIVE position, the packaging structure is advanced further and stopped at another predetermined axial position at which it is desired to cut the packaging structure, and the entire operative cycle is repeated as necessary.
摘要:
A tool system comprises a circular saw blade which is adapted to be moved in a reciprocating manner between an elevated, RETRACTED, INOPERATIVE position and a lowered, EXTENDED, OPERATIVE position so as to repeatedly form slits within a packaging structure at a plurality of positions which are defined at predeterminedly spaced locations along the longitudinal extent of the packaging structure. A circular saw blade guide member is disposed adjacent to the outer periphery of the circular saw blade and is movable along with the circular saw blade between its elevated, RETRACTED, INOPERATIVE position and its lowered, EXTENDED, OPERATIVE position. Accordingly, as the circular saw blade is moved from its lowered, EXTENDED, OPERATIVE position back to its elevated, RETRACTED, INOPERATIVE position, the guide member will in effect guide the circular saw blade back through the slit formed within the packaging structure so as to facilitate the retractive movement of the circular saw blade, back through the slit formed within the packaging structure, thereby effectively eliminating the tendency of the circular saw blade to otherwise encounter the edge or wall portions of the packaging structure, which define the slit, in an obstructive manner as the circular saw blade is moved from its lowered EXTENDED, OPERATIVE position to its elevated RETRACTED, INOPERATIVE position in preparation for the performance of a subsequent cutting operation.