Abstract:
1,1,3,3-Tetrafluoropropan-2-ol and 1,1,1,3,3-pentafluoropropan2-ol are prepared by the vapor phase catalytic halogen hydrogenolysis and carbonyl reduction of perhaloacetones with hydrogen employing a supported palladium on carbon catalyst.
Abstract:
A clamp for securely holding ends of tubing together in end-toend relationship is disclosed, in which the tubing so held carries a flange about its end. The clamp comprises four separable sections of identical shape, in which each section has means for locking together with another section to form two identical clamp halves. Each clamp half defines a bore to receive and hold tubing. The bore has an enlarged portion to receive and hold the tuning flange. Each clamp half also defines arms and slots positioned so that the arms of each clamp half are capable of engaging the slots of the other clamp half to secure the two halves together with the tuning ends mounted in each clamp half being secured together in end-to-end relationship.
Abstract:
A REAGENT AND METHOD FOR THE DIAGNOSIS OF INFECTIOUS MONONUCLEOUSIS EMPLOYING HORSE ERYTHROCYTES WHICH HAVE BEEN SUBJECTED TO ALDEHYDE FIXATION, SPECIFIC SENSITIZATION WITH ANTISERUM TO FORSSMAN-LIKE ANTIGENS AND THEN ANOTHER FIXATION WITH SAID ALDEHYDE.
Abstract:
1,1,1,3,3,3 - HEXAFLUOROPROPAN - 2 - O1 IS PREPARED BY THE VAPOR PHASE CATALYTIC REDUCTION OF HEXAFLUOROACETONE WITH HYDROGEN EMPLOYING A SUPPORTED PALLADIUM ON CARBON CATALYST.
Abstract:
A composite signal comprising an analog signal with transient pulses superimposed thereon is periodically sampled and each sample is converted to a digital value which is stored in a buffer register prior to transfer to a data processing unit. A special circuit comprising a differentiator and comparator continuously receives the composite signal, detects the transient pulses, and forces a value into the buffer register to represent each transient pulse, even though the pulse may occur during an interval when the composite signal is not being sampled by the normal analog to digital conversion circuit. The special circuit may include a counter which is preset to a value N so that the value representing a transient pulse may be forced into the buffer register during N successive cycles. This permits control of the width of the transient pulses when the digital data is reconverted to analog form.
Abstract:
Air Block Prevention System for intravenous fluid administration sets or the like having a hydrophilic (i.e., wettable) filter utilizes a fluid filled purge line to permit air trapped above the filter when a solution container has run dry to be expressed from the fluid path so as to permit a continuation of fluid delivery to a patient without requiring withdrawal and reinsertion of the needle in the patient and without danger of air embolism.
Abstract:
A rotary seal for a centrifuge particularly usable in the process of cell washing for transferring fluid between a rotary member and a stationary member of an apparatus adapted to contain fluids. The rotary seal member comprises a hollow first housing, and a second housing disposed in the first housing in spaced relation therewith to define an annular chamber. One of the housings is rotatable in concentric relation relative to the other housing. A plurality of sealing means are transversely mounted between the first and second housings to divide the annular chamber into several separate sealed portions, and conduits lead from the exterior of both the first and second housings to separate sealed portions of the annular chamber.
Abstract:
A catheter needle guard unit having a hub with a cannula needle affixed therein to form a passageway through the hub and cannula, said needle being pointed at the distal end, and a needle guard means having a sleeve member with a longitudinal slot adapted to snap over the entire length of the needle in snug relationship therewith to form a protective closure over the point of the needle when in the closed position and swingably fastened to the hub through an intermediate flexible connecting section.
Abstract:
Apparatus is provided for separating gases and liquids and particularly for removing and venting gases contained in liquids. The separation is obtained by interposing a filter which is wetted by liquid across the liquid outlet line; this filter passes the liquid but repels the gas. Another portion of the same filter is liquid repellent, and is interposed across a gas outlet line; this passes the gas to a vent, and repels the liquid.