Abstract: An antithrombogenic synthetic polymer has repeat structural units represented by the following structural formula consisting of portions I and II: ##STR1## a microdomain structure composed of crystalline phases and amorphous phases, each phase having an average size of 5 to 10 nm, and a molecular weight in the range of about 10,000 to about 300,000. The polymer exhibits little adhesion of blood platelets thereto, an excellent antithrombogenic property and a sufficient mechanical strength.

Abstract: A process for the preparation of a coherent protective layer on a substrate surface of a body, the substrate surface comprising elemental metal or an alloy thereof, which process comprises applying to the substrate surface an aqueous solution of a partially neutralised homo- or copolymer of a mono- or polybasic ethylenically unsaturated acid; and heat-curing the layer so formed at a temperature above 180.degree. C.

Abstract: A very stiff mounting device, particularly for a machine tool or measuring instrument, is constructed from six rod-like members the ends of which are rigidly coupled together to form a tetrahedral structure and mounting means comprising a rigid member fixedly coupled to three of said rod-like members, said three rod-like members not being co-planar.

Abstract: A magnetic field of required strength is provided in a desired space by a set of electrical conductors supplied with an electrical current or currents the current distribution being determined by the induced surface current distribution in a conductive former shaped to be of the same shape as the set of conductors. This enables magnetic coils of complex design to be readily designed.

Abstract: A scanning optical microscope which comprises a source of optical radiation and means for focussing radiation from the source into an interrogating spot on a surface under examination. The spot is deflected about a point on the surface, and the surface topography is measured by measuring the amplitude and/or phase of the radiation reflected from the surface at the spot position.

Abstract: Phenyl-3-aminoalkyl-4-methyl-2,6-dioxopiperidines of the Formula I ##STR1## wherein: R.sub.1 represents hydrogen or C.sub.1 -C.sub.4 alkyl;n is 1 or 2;R.sub.2 represents hydrogen or methyl, provided that one R.sub.2 is hydrogen when n is 2;R.sub.3 represents hydrogen or C.sub.1 -C.sub.2 alkyl;R.sub.4 representss C.sub.1 -C.sub.2 alkyl;R.sub.5 and R.sub.6 independently represent hydrogen or methyl;m is 0 to 3; andeach Y is in a meta or para position and independently represents hydroxy, C.sub.1 -C.sub.2 alkoxy, C.sub.1 -C.sub.2 alkyl, C.sub.1 -C.sub.2 hydroxyalkyl, halogen, or trifluoromethyl, provided that hydroxy and alkoxy are not in the para position.or pharmacologically acceptable acid addition salt thereof have analgesic activity. The compounds can be administered enterally, parenterally or topically. The topical compositions are novel.The presently preferred compound is 3-(3'methoxyphenyl)-3-(3"-N,N-dimethylaminopropyl)-4,4-dimethyl-2,6-dioxop iperidine (AGN 2979).

Abstract: A novel optical system and method for coupling and mixing a plurality of beams which may originate from different optical sources and may be of different colors. There is provided deflection and steering of light beams with automatic (self-aligning) Bragg matching over a large beam deflection range which is not limited by the Brass condition. There is also provided a novel method of spatial light filtering and modulation, image color conversion, bidirectional beam interconnection for optical communication and combining and locking of laser sources.

Abstract: A radiation detector for detecting the axial position of radiation incident to a scintillation element. Roughened surface portions are selectively configured and interstitially positioned relative to mirror-polished surface portions at discrete intervals along the axis of the element for optimizing the position resolution by varying the light reflection characteristics of the element.

Abstract: In a static induction transistor of tunnel injection type, a tunnel injection region is formed between its source region and channel region, and its gate region is formed of a semiconductor having a forbidden band larger than that of said channel region and contacting partially or wholly with the surface of said channel region. Such a transistor is also applied to an integrated circuit.

Abstract: This invention relates to a vacuum refuse collector comprising: a body; a refuse container mounted on the body having a refuse chamber; a filter in the refuse chamber of the refuse container dividing the refuse chamber into a refuse side and a non-refuse side; a flexible refuse tube communicating with the refuse chamber on the refuse side of the filter; an atmosphere port; an air velocity increasing means; duct means forming a first air path from the non-refuse side of the refuse chamber to the inlet of the air velocity increasing means, through the air velocity increasing means and then to atmosphere and a second air path from the atmosphere port to the inlet of the air velocity increasing means through the air velocity increasing means and to the non-refuse side of the refuse chamber; and control means for controlling the differential of air velocity in the first path and the second path to control the air velocity in the pick up tube.

Abstract: This invention provides a process for preparing lactams, by selectively reacting a novel 1-hydrocarbyl-amino (or heteroatom-substituted hydrocarbylamino); 1,1-dicarboxylic acid, alkylesters; 1-hydrocarbyl (or heteroatom-substituted hydrocarbyl) carboxylic acid, alkyl ester methane, as the salt of an acid having a pKa of 0 or more, in the absence or presence of a base, whereby novel lactams wherein one or both hydrocarbyl moieties are incorporated into the lactam ring are obtained. That is, the acid moiety of said novel salt promotes the reaction whereby both hydrocarbyl moieties are incorporated into the ring, while the presence of a base, in an amount substantially equivalent to said acid promotes the reaction whereby only one hydrocarbyl is incorporated into the ring.

Abstract: A method of measurement of mass flow rates of multicomponent systems comprises directing gamma radiation from a collimated source onto extended scattering means irradiating the flowing medium with single-scattered gamma photons, detecting scattered photons with wide angle photon energy detectors and computing the flow rates from the component velocities and densities.

Abstract: A dental impression package pre-loaded with dental impression material adapted for taking accurate impressions of a patient's teeth and/or gums by professional personnel is provided. The impression material used is flowable to a desired degree and has a viscosity of substantially one million centipoises. Packaging a pre-loaded dental impression tray is accomplished by first quickly immersing the loaded tray in a solution of natural latex for a few seconds and then quickly removing the coated product followed by quickly immersing it in a coagulating solution of acetic acid for a few seconds to stabilize the latex coating; withdrawing the stabilized coated product; drying it; and suitably packaging the product for storage and sale. If the impression material is of a light-curable nature, the packaging is of light-opaque nature.

Abstract: A dental impression tray and method of using it to form in a light-polymerizable impression material an impression of a portion of dental anatomy in an oral cavity, the tray being formed of transparent material, preferably clear plastic, and molded into a channel-like shape defined by walls capable of having visible actinic light applied to the walls transmitted both through and within the walls. At least some of the outer edge portions of the tray are beveled, guiding light that has entered the walls of the tray against exiting loss that would not be effective in initiating polymerization of the impression material.

Abstract: In an MONOS type nonvolatile semiconductor memory comprising a channel forming semiconductor region between source and drain regions in a surface of a substrate; a tunnel insulating film formed on the channel forming semiconductor region in the surface of the substrate, the tunnel insulating film permitting charge-injection; a silicon nitride film formed as a second insulating film on the tunnel insulating film; a silicon oxide film formed as a third insulating film; and a conductive electrode formed on the silicon oxide film, the silicon nitride film has a composition close to a stoichiometric value of Si.sub.3 N.sub.4 at a portion near an interface with the tunnel insulating film and has a composition of excess silicon at a portion of the thickness of the same film except near the interface with the tunnel insulating film.

Abstract: This invention provides an optical recording material comprising a base and a thin film formed on the base and composed of oxides which are represented by the formula (V.sub.2 O.sub.5).sub.1-x. (M.sub.y O.sub.z).sub.x wherein M.sub.y O.sub.z is at least one of metal oxides, metalloid oxides and non-metal oxides, and 0.ltoreq.x<1 and which have an amorphous or layer structure and a process for preparing an optical recording material, the process comprising the steps of applying to a base a solution, sol solution or gel solution of amorphous oxides represented by the formula (V.sub.2 O.sub.5).sub.1-x.(M.sub.y O.sub.z).sub.x wherein M.sub.y O.sub.z is at least one of metal oxides, metalloid oxides and nonmetal oxides, and 0.ltoreq.x<1, and evaporating off the solvent.

Abstract: Neutral 2:1 ligand:zinc(II) complexes in which at least one ligand is provided by a compound being 3-hydroxy-4-pyrone or a 3-hydroxy-4-pyrone in which one or more of the hydrogen atoms attached to ring carbon atoms are replaced by an aliphatic hydrocarbon group of 1 to 6 carbon atoms are of value for use in effecting an enhancement of the oxygen binding ability of a patient's haemoglobin, this being of particular application in the treatment of sickle cell disease.

Abstract: A method of preparing an oxygen-containing ferromagnetic amorphous alloy comprising the step of: sputtering an oxygen-containing composite target composed of an oxide and a metal or metal alloy, thereby forming a film of the amorphous alloy on a substrate, the amorphous alloy consisting of:M.sub.x G.sub.y O.sub.zwhere M is one or more transition metals of Fe, Co and Ni; or a combination of the transition metal or metals and one or more metals selected from the group consisting of V, Cr, Mn, Nb, Mo, Hf, Ta, W, Pt, Sm, Gd, Tb, Dy and Ho; G is one or more elements selected from the group consisting of B, Ge, As, Sb, Ti, Sn and Zr; oxygen (O) is supplied by the oxide; and x, y and z are the atomic percentages of M, G and O and x+y+z=100, the composition of the amorphous alloy being in the pentagonal hatched zone in FIG. 1 and the pentagonal zone being defined by the lines joining the points of A (80, 19, 1), B (50, 49, 1), C (36, 36, 28), D (36, 4, 60) and E (38.5, 1.5, 60) shown in FIG. 1.

Abstract: A flexible windscreen wiper arm (1) of unitary construction, having means (2, 3) at one end of the arm for attachment to a wiper blade, and means (6) at the other to engage a rotary driving spindle (8). Between the two ends of the arm is a region (12) capable of toggle action between two opposite and stable positions. When the socket (6) is in place over the spindle (8) and the toggle region is in one stable position, the socket grips the spindle and the blade will be angled so as to press the blade against a windscreen. In the other extreme position of the toggle, the arm is angled to lift the blade clear of the windscreen and the grip of the socket on the spindle is released, allowing removal of arm and blade from the spindle.

Abstract: An orthopeadic splint comprises a plurality of self-contained compartments (10, 20,30) having flexible impermeable walls, each compartment containing fluent granular material and being provided with a valve (11, 21, 31) allowing evacuation and inflation respectively to solid and deformable conditions, the compartments being connected serially with a common wall portion between each successive pair of compartments.