Reaction between a liquid reagent and a gaseous reagent wherein at least one of the products is a liquid is carried out by first mixing the liquid reagent with liquid product, so that the reaction with the gaseous reagent is carried out while the liquid reagent is in a solution of the liquid product. The mixture of liquid reagent and liquid product is contacted with the gaseous reagent while the liquid mixture is in rapid circulation. The device for carrying out an exothermic reaction between a ...

To perform holographic interferometric analysis of the deformation of a relatively small section of a larger surface, the section is first painted with retro-reflective paint and a photographic plate is supported parallel to and closely spaced from said section. The light beam from a laser is passed through a diverging lens onto the photographic plate to illuminate the section, thereby exposing the photographic plate to direct illumination from the beam and to reflected radiation from the sectio...

A plurality of test tubes formed as an integral unit together with a member that is marked with indicia for reagents to be mixed in the tubes in performing tests to determine blood type groups. A testing rack is also disclosed for accommodating a plurality of test tube units and indicia members.

A method and an apparatus for performing combustion in a closed system employing recirculated exhaust gas, by the use of a combustion chamber and an exhaust gas cleaning chamber connected by an exhaust gas duct and a recirculation pipe to the combustion chamber. The exhaust gas cleaning chamber has an oxygen supply pipe, means for supplying a pressurized aqueous solution (or oxidant-absorbing pressurized aqueous solution), a carbon dioxide supplying means, and a mixing fan. A safety pressure val...

A system for the automated analysis of large numbers of liquid samples, in which a multiplicity of sample tubes are loaded in racks into a cassette and the loaded cassette is transferred from station to station, with operations of sample insertion, dilution, reagent addition and withdrawal for filtering being performed at successive stations. At each station there is a separate processing module adapted to receive the cassette, each module including the apparatus necessary for performing one of ...

A device for performing catalytic endothermic reactions which comprises a vessel having a heat exchanger provided with cooling tubes which extend through an outer tubesheet of the heat exchanger. These tubes are sealed against the outer tubesheet of the heat exchanger, and are connected rigidly to the inner tubesheet. Reaction tubes are provided with catalyst support grids, and the sections of these tubes below the grids are of a length that is at least equal to the diameter of the respective tu...

A device for introducing fluids into the lumen of a body duct comprises an elongate shaft having a mechanism at its distal end for capturing the duct. A needle is disposed within an axial passage in the shaft, and a mechanism for reciprocating the needle is located at the proximal end of the shaft. In this way, the duct can be captured with the capture mechanism and pierced with the needle. The fluid is then provided to the lumen of the duct through a perfusion port located at or near the distal...

A process for performing an enzyme-catalyzed reaction in a reaction mixture comprising two phases, a first aqueous phase containing an enzyme which is not accessible and a second substantially non-aqueous phase containing a non-water miscible solvent wherein a compound derived from fluorescein or a substituted fluorescein is present for the purpose of measuring aqueous pH by monitoring spectroscopic properties. Novel compounds derived from fluorescein or a substituted fluorescein which may be us...

A method and apparatus is disclosed for mechanically-assisted liposuction treatment. The apparatus includes a hand-holdable housing, a cannula, and a reciprocation mechanism. The hand-holdable housing has a cavity adaptable for receipt of a portion of the cannula. The cannula has a distal end and a proximal end and at least one suction aperture about the distal end. The cannula also has a base portion which is operably associated with the proximal end and insertable within the cavity so that the...

The present invention relates to a method of performing surgery on a spinal column utilizing a posterior spinal system including components designed to be affixed to the spinal column of a person to correct for various lateral and sagittal deformities. The method includes the use of a pair of smooth surfaced rods mounted in spaced relation to one another on the spinal column in conjunction with various fixation devices such as clamps with hook bodies, hooks, screws with hook bodies and couplers....