Abstract: Disclosed is a fluid separator for isolating a component from a composite fluid having one fluid entrained within, but immiscible in, another fluid, and the two fluids have differing specific gravities. An enclosed chamber of the separator houses an elongated spillway having a first end that receives the composite fluid through an inlet-port. A second end of the spillway, located in the chamber's sump, includes spillway outlet-ports for discharging the composite fluid into the chamber. The separator also includes a flat, first solid plate that slopes diagonally across the chamber from the top of the spillway near the inlet port to the sump. A flat, second solid plate slopes diagonally across the chamber from the bottom of the spillway in the sump to a juncture with the first solid plate. Fluid flowing through the separator passes through gaps between the peripheries of the first and second plates and a wall that encloses the chamber.

Abstract: Macrocyclic antibiotics having ring structures with at least 10 members act as separation agents in crystallization, precipitation, filtration, electrophoresis and chromatography. The macrocyclic antibiotics include ansamacrolides, macrolides, macrocyclic peptides, polyenes and derivatives thereof. The process has been found to be especially advantageous for separation of optical isomers by electrophoresis and chromatography.

Abstract: The present invention is directed to a novel rotor design employed in a centrifuge for use in separating fluids. The rotor is configured with a separation chamber which comprises a plurality of channels extending axially and radially throughout the separation chamber. Radial plates extending axially and radially throughout the separation chamber at least partially define the channels. A first and a second weir, each having a front face and a crest extending substantially annularly about the axis of rotation, are also included in the rotor. A fluid outlet passageway is also provided through which the second fluid may exit the separation chamber. The fluid outlet passageway comprises a plurality of channels configured to permit radially inward flow and prevent circumferential flow of the second fluid. These channels are at least partially defined by radial partitions which extend axially and radially within the fluid outlet passageway.

Abstract: A centrifuge (10) for spinning blood sample tubes (14) has a conical rotor head (17) rotated within a cavity defined by an upwardly open annular trough (39) and a domed lid (50). The tubes (14) are inserted into transparent plastic tube holders (48). The holder top ends (60) are funnel-shaped to capture spillage and enable manual gripping. The trough has oppositely sloping walls (40, 41) and holder bottom ends (59) are exposed for ready viewing below the head bottom edge. A reader station (15) includes a pointer (80) with a lens (86) that has hairlines (87) for aligning the pointer over the spin tube (14a) to enter data on the red cell/plasma interface. The lines (87) are spaced to match the diagonal appearance of the interface. An interlock assembly includes a solenoid operated shuttle arm (108) that blocks movement of a pin (95) out of a bore (94) in a lid tab (92), unless motor (23) is deenergized.

Abstract: A centrifuge rotor head has a hollow frusto-conical housing with parallel inner and outer, upwardly and inwardly inclined walls joined at top and base ends by top and bottom annular flanges, and closed at the top by a central horizontally extending disc portion. The top flange is interrupted at equiangularly spaced intervals by circular openings which, together with an internal annular chamber, present steep angled cavities making angles of about 20.degree. with the rotor cone axis. The housing is capped at its upper end by a circumferentially-extending crown-shaped ring which has a plurality of upwardly and inwardly inclined projections located radially outward of the openings. The projections support the exposed upper ends of tubes placed in the cavities, to guard against neck breakage and stopper dislodgement during spinning.

Abstract: A pulse dampener for use in a pumping system including a reciprocating pump comprising a body having a cavity formed therein and a cover for sealed connection with the body. A diaphragm is secured between the body and the cover for sealing the cavity from said cover. The cover includes an inlet and outlet and the cover and the diaphragm cooperate to define a liquid flow path through the pulse dampener. The body also includes a gas inlet means for receiving gas into a chamber defined by the cavity and the diaphragm. A gas is supplied into the chamber such as to provide a smooth flow through the pumping system. An associated method is also provided.

Abstract: The media is an ether derivative of cyclodextrin such as a permethylated hydroxy ether of cyclodextrin or a dialkyl trifluoroacetyl ether derivative of cyclodextrin and is used in capillary gas chromatographic columns. Particular benefit is obtained using the ether derivative of cyclodextrin in a fused silica capillary.

Abstract: An automatic hematocrit reader wherein a sample of blood in a microhematocrit capillary tube is banded with a standing wave from an ultrasonic transducer. A light source and photocell combination is used to determine the relative thicknesses of the bands of red blood cells and the bands of plasma. The hematocrit of the sample of blood is electronically calculated from this data. A calibration strip is included so that the device is calibrated each time the hematocrit is determined. The device includes a mechanical interlock/eject system for the microhematocrit capillary tube and is specifically configured so that the operator does not handle or even touch the microhematocrit capillary tube.

Abstract: The present invention relates to electrophoresis. More particularly, the present invention relates to utilization of electrophoresis with controlled cooling. Still more particularly, the invention relates to a method and apparatus for separating chemical components in a solution in both a batch and a continuous mode.

Abstract: The present invention involves a dual column chromatographic apparatus with column switching capability that is useful in any pressurized fluid chromatography system. The apparatus has at least a first and second chromatographic column, a detector, a fluid conveyance system having a multivalve arrangement, pressurizable fluid conduit assembly, and a controller.The columns are adapted for containing stationary phase or packing for separation of a multicomponent sample into one or more components. The multi-valve arrangement has a plurality of multi-port, multi-modal valves and can include an ingress-egress valve; a guard pre-column valve; detector isolation valve; a set of four, four-port, multi-modal valves; or a set of two four-port, multi-modal valves and one six-port, multi-modal valve or a first valve set and a second valve set. The two chromatographic columns, multi-valve arrangement, and detector are linked for pressurized fluid communication by the pressurized fluid conduit assembly.

Abstract: The media is an ether derivative of cyclodextrin such as a permethylated hydroxy ether of cyclodextrin or a dialkyl trifluoroacetyl ether derivative of cyclodextrin and is used in capillary gas chromatographic columns. Particular benefit is obtained using the ether derivative of cyclodextrin in a fused silica capillary.

Abstract: A method and apparatus for conducting electrophoretic separations is described in which heat exchange fluid is passed through hollow fibers in the electrophoretic chamber during the separation process and the separations are conducted in the interstices of the hollow fiber. Hollow fibers made of organic polymers, inorganic materials such as glass and silica, and natural fibers may be used.

Abstract: The media is permethylated hydroxy ether of cyclodextrin and is used in capillary gas chromatographic columns.

Abstract: This invention is an ultrasound apparatus for determining hematocrit. A sample of blood in a microhematocrit capillary tube is acoustically coupled to an ultrasound transducer which creates a standing wave in the blood sample. Red blood cells in the blood sample are packed in bands that correspond to the nodes of the standing wave. The thickness of the bands as a function of the thickness of the remaining plasma is an indication of the hematocrit of the blood sample.

Abstract: An improved method for reclaiming waste printing ink is provided that requires no dilution nor blending with virgin ink wherein substantially all entrained water and solvent contamination is removed in a vacuum distillation step. Solid impurities are removed via a subsequent filtration method that leaves the ink's pigment content substantially undiminished.

Abstract: A method and apparatus for treating acidic water, such as mine acid water is provided. The apparatus is readily portable and comprises a reaction vessel having an aerator motor operatively associated therewith. Water to be treated is received within said reaction vessel and is treated by having a neutralizing agent and oxidant by way of the aerator motor introduced simultaneously into the system. Because of instantaneous elevation of pH resulting from the simultaneous introduction of oxidant and the neutralizing agent, the reaction time is greatly reduced and the equipment required is small, compact and easily transported.

Abstract: This invention relates to a column for use in preparative HPLC so structured as to insure a reproducible packing bed uniformity regardless of the particle size of the medium used.

Abstract: An HPLC column provided with structure at its inlet and outlet ends to insure optimal distribution of fluids through the media therein.

Abstract: A highly selective bonded phase material useful to separate a wide variety of organic and inorganic substances by thin layer chromatography (TLC), liquid chromatography (LC) or high performance liquid chromatography (HPLC) is produced by bonding a cyclodextrin to a silica gel by means of a specific silane linkage. The preparation of such materials and their uses are described.