Abstract: A three-layer blank and a process are disclosed for the formation of frames of metal beam leads that are bonded to integrated circuit chips. The blank incorporates an improved negative-working resist having adhesion to the metal as well as flexibility. The process of forming the leads includes the step of fully photopolymerizing the resist to avoid outgassing of residual monomer as would otherwise occur during bonding.

Abstract: There is disclosed a composition and element, comprising a diazo resin and a mordant for anionic dyes that is compatible with the resin. The element of the invention is suitable for dye immersion and dye transfer to a mordanted receiver.

Abstract: Methods, compositions and elements for detecting a nitrogen-containing compound capable of releasing ammonia upon enzymatic action are described. The method comprises contacting in an aqueous medium a sample suspected of containing such a compound and a novel assay composition comprising at least one enzyme which catalyzes the decomposition of the compound to ammonia and detecting the ammonia by condensation with a diketone and measuring the color or fluorescence produced by the resulting dihydropyridine.The foregoing assay composition can be incorporated into single-layer or multilayer analytical elements of the type known in the prior art. A preferred such element comprises an isotropically porous spreading layer in fluid contact with a reagent layer. The spreading layer is most preferably non-fibrous.

Abstract: A scanner is provided for radiometric analysis of a substrate of the type which can require a controlled environment. The substrates are positioned on platforms rotated about an axis, and at least a portion of the radiometer is mounted for rotation independently of the platform rotation.

Abstract: A light-sensitive vesicular imaging element and a method of manufacture are provided, comprising a vesiculating layer which includes a binder and vesiculating agent which liberates gas upon exposure to activating radiation, and an overcoat which contains a polymer soluble in a solvent in which the binder of the vesiculating layer is substantially insoluble. Upon imagewise irradiation of the element, gas bubbles are generated in the exposed areas. The bubbles may be developed to a visible record by overall heating.

Abstract: Modified ferromagnetic chromium oxide having an intrinsic coercive force above 150 Oersteds, a Curie temperature lower than that of unmodified chromium dioxide, and a specific magnetization in the range of 50-110 emu/gm., is prepared by heating material containing chromium (III) and sulfur in a form to yield upon oxidation a ferromagnetic chromium oxide with substitutional sulfur enhancing its magnetic properties.

Abstract: A blood serum separator-dispenser capable of collecting, separating and/or dispensing is disclosed a biological fluid such as serum from an essentially closed container. A valve can be provided to separate the container into two compartments, one for serum separation and the other for serum dispensing.

Abstract: A spotting apparatus for touching a container, having a capillary exit, to a pressure-sensitive substrate, wherein the pressure of such contact does not exceed generally that provided by the weight of the container. Such pressure control is achieved by permitting relative axial movement of the exit portion of the container with respect to the activating mechanism, to compensate for overtravel of the mechanism.

Abstract: Apparatus, featuring a dispenser, for the dispensing of biological fluids in micro amounts from a source of the fluid. The apparatus comprises a dispenser having a dispensing chamber with a platform suitable for drop formation, at least one valve controlling the flow of fluid to the chamber, and means such as a tubular passageway for joining the dispenser to a container of biological fluid.

Abstract: An imaging element and process wherein a tetrazolium cation, which is present in combination with a reducing anion as a salt, is imagewise exposed and reduced by the anion to form a formazan dye, without the need for a separate photoreductant. Stabilization of the resulting dye and fixing of the element can be achieved by the introduction into the element of a salt of a metal.