Abstract: A method of capturing and removing contaminant particles moving within an evacuated interior region of an ion beam implanter is disclosed. The steps of the method include: providing a particle collector having a surface to which contaminant particles readily adhere; securing the particle collector to the implanter such that particle adhering surface is in fluid communication to the contaminant particles moving within the interior region; and removing the particle collector from the implanter after a predetermined period of time.

Abstract: Low viscosity, highly concentrated surfactant suspensions for replacement therapy In diseases of the respiratory tract are described. The suspensions are characterised in that they contain calcium and/or magnesium ions bound to the surfactant and unbound in the suspension agent, as well as containing a certain amount of common salt.

Abstract: This invention relates to a process for the production of carbonic acid esters from carbonyl compounds and organic hydroxy compounds, such as alcohols and phenols, in the presence of oxidizing metal ions.

Abstract: A translation lookaside buffer for use with a virtual memory system including apparatus for storing virtual addresses, apparatus for storing a physical address associated with each of the virtual addresses, some of the physical addresses corresponding to pages in which the information sought by the virtual address resides, and others of the physical addresses corresponding to pages in which the physical address of information sought by the virtual address resides.

Abstract: A translation lookaside buffer for caching virtual addresses from a plurality of sources along with the associated physical addresses which physical addresses must be rapidly accessable and in which virtual addresses may appear simultaneously from two of the sources requiring translation into physical addresses, including a primary cache for storing a plurality of individual virtual addresses and associated physical addresses from all of the plurality of sources, apparatus for storing a single virtual address and its associated physical address from one of the plurality of sources which occurs most often each time a virtual address and an associated physical address from that one of the plurality of sources is referenced in the primary cache, and apparatus for ascertaining whether the virtual address held in the apparatus for storing a single virtual address and an associated physical address is a virtual address sought when an attempt is made to access the primary cache for a virtual address from the one of

Abstract: In the memory access unit of the present invention, the memory request logic is centralized in the memory management unit (MMU). The MMU instructs the MCU, which interfaces directly with the DRAMs, on the type of memory access to perform. By centralizing the memory requests, the MMU is able to maintain an account of each memory access, thereby providing the MMU the means to determine if a memory access fulfills the requirements of a fast page mode access before a request is made to the MCU. The MMU comprises the row address comparator which can execute the row address comparison in parallel with the cache lookup. Therefore, if the cache lookup determines a memory access is required, a specific fast page mode memory access request can be made, without the memory controller incurring the additional delay of checking the row address.

Abstract: Lightweight composite material which contains reinforcing fibres in a thermoset matrix and has been obtained by providing voluminous three-dimensional structures of reinforcing fibres more than 50 mm long, which are in the form of a knitted fabric or loop fabric with a hollow space content of at least 50 vol. %, with a thermosetting resin such that the lightweight composite material contains hollow spaces.

Abstract: A process for the continuous production of laminated sheet materials of thermoplastic polymers, reinforcing fibers and metals, in which endless sheets of reinforcing fibers, thermoplastic polymers and metals are combined in layers and the layers thus combined are continuously exposed for 0.1 to 10 minutes to a pressure of 0.5 to 50 bar at a temperature 20.degree. to 150.degree. C. above the melting temperature of the thermoplastic polymer.

Abstract: A lightweight composite material is disclosed which comprises three-dimensionally arranged fibers of at least 50 mm length provided in a thermoplast matrix. The thermoplast matrix is thermally treated to form cavities within the matrix.

Abstract: Stable, dosage forms of .alpha.-interferons, particularly alpha-2-interferon, are described, which comprise a non-lyophilized dry film of acid-stabilized .alpha.-interferons, e.g. alpha-2-interferon, on inert carriers.

Abstract: A microstrip IMPATT circuit tuning mechanism for use with RF producing IMPATT diode combinations including a microstrip circuit board and a external load line connected by a coupling spring attached to the load line and separated from the microstrip circuit by a dielectric layer, the coupling spring being manipulated by a dielectric screw inserted through the housing containing the microstrip board and further having a metallic frequency controlling screw extending through the housing and terminating before the microstrip board.

Abstract: An SCR catalyst consisting essentially of iron sulfate or oxysulfur iron compound carried by a mixture of ceria and alumina on a support.

Abstract: Polycumylene of a relatively high degree of polymerization is obtained in a reasonable space-time yield by Friedel-Crafts alkylation of .alpha.-cumyl halide when catalyst composition, catalyst concentration and dilution ratio are selected within certain limits.

Abstract: An SCR catalyst consisting essentially of iron sulfate or oxysulfur iron compound carried by a mixture of ceria and alumina on a support.

Abstract: The invention is directed to a control circuit for controlling the current of a welding transformer integrated in an industrial robot. For the purpose of achieving a simpler, more accurate and more reliable detection of contact between the welding tongs (4, 5) and the parts (11, 12) to be joined by welding, there are provided a high-frequency generator (1) for supplying measuring current to the secondary circuit (2) of the welding transformer, an impedance measuring circuit (3), an additional impedance (7) for increasing the impedance of the secondary current (2) to high frequency, an interrupter circuit (8) for interrupting the welding current, and a comparator for enabling the welding current merely in the presence of a differential voltage signal which corresponds to complete contacting of the two parts to be joined by welding.

Abstract: Urethanes are made by reacting an organic nitro compound with an organic compound containing at least one hydroxyl group in the presence of carbon monoxide, hydrogen and a catalyst system. The carbon monoxide and hydrogen are used in quantities such that the molar ratio of CO to H.sub.2 is from 0.3:1 to 3:1. The catalyst system is made up of at least one noble metal or compound of a noble metal from Group VIIIB of the Periodic System of Elements, at least one organic nitrogen base and a co-catalyst combination of iron or copper oxidic or hydroxidic compound and a chloride compound. The product urethanes are useful in the production of isocyanates and pesticides.

Abstract: Urethanes are made by reacting a primary amine with carbon monoxide and a compound containing at least one hydroxyl group in the presence of an oxidizing agent and a catalyst system. The catalyst system is made up of (i) a noble metal and/or a noble metal compound of a metal of the Eighth Secondary Group of the Periodic System of Elements and (ii) an oxidizing quinoid and/or a compound capable of being converted to an oxidizing quinoid compound under the reaction conditions. The catalyst system may optionally include (iii) metal compounds of elements of the Third to Fifth Main Groups and/or First to Eighth Secondary Groups of the Periodic System of Elements and/or (iv) a tertiary amine. This reaction is generally carried out at a temperature of from 100.degree. to 300.degree. C. and at a pressure of from 5 to 500 bars. The product urethanes are useful in the production of isocyanates and pesticides.

Abstract: The invention relates to a process for the preparation of carbonic acid esters with high selectivity and under reaction conditions which permit high space/time yields, said process being one in which an alcohol is allowed to react with a mixture of molecular oxygen and carbon monoxide in the liquid phase in the presence of a catalyst system containing copper, chemically bonded oxygen, chemically bonded halogen and at least one nitrogen base.

Abstract: A urethane is produced by reacting an organic nitro compound with carbon monoxide and an organic compound containing at least one hydroxyl group in the presence of a catalyst and a co-catalyst. This reaction is conducted in the liquid phase at elevated temperature and pressure. The catalyst employed is an element and/or compound of an element from the group of noble metals of the 8th Secondary Group of the Periodic Table. The co-catalyst used is formed from (1) a component taken from the group consisting of iron oxychloride, a mixture of iron compounds containing iron oxychloride and oxide-chloride combinations and (2) metallic iron or an iron alloy in finely divided or high surface form. The oxides which may be used in the oxide-chloride combinations of co-catalyst component (1) are the oxides and/or oxide hydrates of tetravalent tin, trivalent chromium, hexavalent molybdenum, hexavalent tungsten, pentavalent vanadium, divalent iron and trivalent iron.

Abstract: Production of urethanes by the oxycarbonylation reaction of N,N'-disubstituted ureas and organic compounds containing at least one hydroxyl group with carbon monoxide in the presence of molecular oxygen and/or organic nitro compounds and a catalyst system comprising (a) a noble metal and/or noble metal compound of the eighth subgroup of the periodic system of elements and (b) a compound of an element and/or elements of the third to fifth main group and/or first to eighth subgroup of the periodic system of elements characterized in that said compounds are capable of undergoing Redox reactions under the reaction conditions.