Abstract: Methods are provided for determining relations between autoimmune degenerative diseases and specific variable regions of T-cell receptors as associated with the host HLA or T-cells associated with umbatting neoprofilerative diseases. By identifying the particular T-cell receptors which cause or are the disease in mammals, various prophylactic and therapeutic techniques may be employed for inhibiting the attack of the T-cell receptors on the native protein or tissue enhance the defense. In addition, individuals may be diagnosed as to their propensity for a particular autoimmune disease or the occurrence of such a disease.

Abstract: This invention concerns a pane having a film, the light transmission of which varies as a function of the direction of the incident light. The deposition technique is cathodic sputtering. It uses, between the cathode 1 and the substrate 4, a guide 6 which channels the particles.

Abstract: Alumina-based adsorbents containing at least one compound of an alkali or alkaline earth metal, wherein the alkali or alkaline earth metal values are present in an amount ranging from 15 mmole to 100 mmole per 100 g of alumina, are useful for the adsorptive purification of polyolefins prepared by the polymerization of olefins in the presence of a metallic coordination catalyst, to remove contaminating catalyst metal values therefrom with but negligible monomer/solvent isomerization.

Abstract: A process for controlling the continuous gas-phase polymerization of one or more alpha-olefins in a fluidized and/or mechanically stirred bed reactor using a high activity catalyst based on a transition metal of groups IV, V or VI of the Periodic Table comprises introducing into the reactor, continuously and simultaneously, an activity retarder and an activator, in very small amounts, in a molar ratio and at flow rates which are varied with time in order to maintain substantially constant either the polymerization rate or the transition metal content of the polymer produced.

Abstract: Impure gaseous silane containing such impurities as, in particular, phosphines and arsines, is purified, whether by chemisorption and/or physical adsorption, by contacting such silane gas with a sorption mass that includes cooper values, e.g., a copper cation-exchanged molecular sieve.

Abstract: A selective deposition process of a refractory metal silicide onto the silicon apparent surfaces of a wafer partially coated with SiO.sub.2, comprising the following steps: flowing in a cold-wall airtight chamber comprising said wafer a gaseous silane composite at a partial pressure P.sub.Si.sbsb.x.sub.H.sbsb.y and an halogenide of said metal at a partial pressure P.sub.Me ; heating the wafer to a first temperature (T1) for a first duration (t1), P.sub.Si.sbsb.x.sub.H.sbsb.y and P.sub.Me being chosen so as to allow a metal silicide deposition to be formed on the wafer, the silicon being overstoichiometric; and, heating the wafer to a second temperature (T2) lower than the first one for a second duration (t2), T2 being chosen as a function of P.sub.Si.sbsb.x.sub.H.sbsb.y and P.sub.Me so as to allow a stoichiometric metal silicide deposition to be formed on the wafer.

Abstract: The invention is in a pneumatic powder ejector comprising a suction stage and an injection stage. The suction stage includes a suction chamber (16), a venturi (14) communicating a primary gas to the suction chamber and a lateral suction input (18) offset in relation to the downstream end of the venturi. The injection stage includes a nozzle (22), an injection chamber (36) and a diffuser (38). The stages are located within a coaxially of the body of a tubular ejector. The nozzle includes a path for powder and primary gas between the suction chamber and diffuser, and is formed to provide a flow path of reduced dimension to communicate a secondary or entrainment gas between the diffuser and injection station.

Abstract: The method of the invention concerns continuous graphitization of long pre-cooked carbon-containing products.It comprises displacing the carbon-containing products in a column, along a horizontal axis of passage, inside a furnace where the packing is a fragmented carbon-containing material which is not displaced within the furnace. The column is put under stress by rams and is heated by the Joule effect.The method can be applied particularly to the production of graphite electrodes for arc furnaces in steel works.

Abstract: Electrochemical generators comprising an anode consisting of a highly reducing metal or metallic alloy, such as an alkali metal or alkaline earth metal, a cathode consisting of a reducible material such as CuO, MnO.sub.2, AgO, and (SN).sub.x and a water-free liquid or solid electrolyte consisting of an ammoniate of a salt of a cation of the anode metal or of a more highly reducing metal, the salt being for example a halide or perhalogenate.

Abstract: The invention relates to an electric furnace for heating by passing a current through the charge, and more particularly, a continuous furnace in which the charge is a carbonaceous material.The furnace according to the invention is provided with a device for allowing non-reactive gas to be circulated in the opposite direction to the charge.The furnace according to the invention is used, in particular, for calcining anthracite.

Abstract: The measuring head enables the production of measuring signals relating to electrical activity and measuring signals relating to an ionic or physico-chemical activity, notably pH, and is designed to be located on or in parts of a living body, notably on the head of an unborn infant. It comprises an insulating body bearing fastening claws. At the moment of positioning, the insulating body introduces actively an electrode sensitive to the electrical activity and at least one electrode sensitive to an ionic or physical activity. These electrodes are constructed in needle form, body body having also a reference electrode associated with the electrode sensitive to the ionic or physical activity.

Abstract: Shelving comprising vertical and horizontal members interconnected to provide lateral uprights, horizontal shelves and a back, these members being interconnected by unitary connecting parts which fit into recesses in the vertical members at the joints thereof and provide extensions from joints with a pin insertable into a blind hole in a horizontal member. These connecting parts prevent relative movement between the adjacent vertical members and horizontal members.

Abstract: After a first extraction of an aqueous nitric acid solution of spent nuclear fuel by a suitable organic solvent and a first washing of the resulting organic phase by an aqueous solution to remove tritiated water, the organic phase is submitted to a second washing with a volume of dilute aqueous solution of nitric acid free from tritium, said volume being substantially smaller than that of the organic phase, whereby the organic phase is rendered substantially tritium-free and contamination by tritium in the following stages of the process is avoided.