4751040 Means and techniques useful in the monitoring and accountability of radioactive materials

4751040 Means and techniques useful in the monitoring and accountability of radioactive materials

x New Patents from the mask. The mask is preferably stationary and electrically alterable and advantaggously includes a base along with separate, pl...

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New Patents

from the mask. The mask is preferably stationary and electrically alterable and advantaggously includes a base along with separate, plural masking structures mounted on one base face with electrical connections coupled to the separate masking structures. The masking structures are formed of a crystalline or polycrystalline thermo or electro diachromatic substance such as vanadium dioxide which has different opacity characteristics to electromagnetic radiation upon selective application of electrical potential thereto. In use, electrical potential is applied to various subsets of the masking structures in a predetermined pattern so as to facilitate mathematical analysis of the generated interference patterns detected by the detection apparatus. The use of a masking device in the present invention allows the use of a small detector which thereby maximizes the signal-tonoise ratio of the detected interference pattern. The use of an electrically alterable mask avoids the need for selective physical repositioning of a masking device, and is specifically adapted for minicomputer control to achieve the most accurate, rapid results.

4751040 MEANS AND TECHNIQUES USEFUL IN THE MONITORING AND ACCOUNTABILITY OF RADIOACTIVE MATERIALS Heinz F Poppendiek assigned to Geoscience Ltd Afterheat being released from a radioactive storage system is measured and monitored. Changes in heat release with respect to time is related to expected radioactive decay processes of the confined radioactive materials. Material leakage from storage is detected and defined by deviations from the normal expected heat release-time function being monitored. Such deviations or lack of deviations, as the case may be, provide the desired accountability of the radioactive materials.

4751004 LIQUID CHROMATOGRAPHIC METHOD AND APPARATUS WITH A PACKED TUBE MEMBRANE DEVICE FOR POST-COLUMN DERIVATIZATION/SUPPRESSION REACTIONS

PROCESS FOR MANUFACTURING A SAFETY GLASS FOR MOTOR VEHICLES AND BUILDINGS, AND PRODUCT SO OBTAINED

Timothy S Stevens, Gary Jewett, Robert A Bredeweg assigned to The Dow Chemical Company

Francesco Sebastiano, Luigi Capriotti, Termoli, Italy assigned to Societa' Italiana Vetro o SIV - S pA

Packing tube membranes or membrane channels for Ion Chromatography with inert or charged ion exchange beads greatly increases overall suppressor efficiency. The length of membrane required is reduced, e.g. from 20 feet to 5 feet and bandspreading is reduced from 870 mul to 200 mul. This significant increase in efficiency is attributed to the mixing action of the packing on the flow stream which results in convective radial transport much more rapid than the diffusion controlled transport observed in unpacked membranes. The technique is also described for developing more efficient liquid chromatographic post-column reactors for adding reagent to the column effluent to increase detection sensitivity.

The invention relates to a manufactured article formed of two transparent layers, preferably one made of glass and the other made of plastic, adapted to be used as glazing for motor vehicle windows and buildings, consisting of a glass substrate onto which is applied a single-layer plastic comprising a composition of polycaprolactones, a vinyl monomer N-vinyl-2-pyrrolidone, mono-, di-, tri-, tetra-acrylic monomers, a photoinitiator, and flow control agents, reaction catalysts, solvents, plasticizers and adhesion promoters, and aliphatic polyisocyanate, which composition is distributed as a liquid with uniform thickness over the surface, which is spun and exposed to ultraviolet radiation to form the coating.

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