Asymmetric gas separation membranes having graded density skins and macrovoid-free morphology comprised of glassy, hydrophobic polymers are disclosed which are effective for separating gases with significant increases in permeation while maintaining equal or greater separation selectivity. The membranes have increased free volume and the graded density skin exhibits a density gradient which become...

La presente invención se refeire a una membrana asimetrica para separación de gas, que tiene piel de densidad graduada y morfologíca libre de marco huecos, caracterizada porque comprende polímeros hidrófobos, similares al vidrio, teniendo la membrana volumen libre incrementado, según se evidencia por la Tg del primer calentamiento de membrana, que es mayor que la Tg de una muestra a granel de los ...

The control manifold comprises a manifold casing which is at least approximately hexagonal, a pair of parallel sides forming thereby the upper and lower narrow sides of the casing, between which, the internal-casing conduit section of the connecting piece for the vacuum pump and for the pressure-medium supply container extend vertically and approximately concentrically; the conduit sections of the...

Reinforced gypsum boards are produced from gypsum (semi-hydrate), if appropriate reinforcing materials, preferably cellulose particles, polyisocyanates being admixed during the manufacture of gypsum boards and/or being applied to the surface of the gypsum boards. The invention also relates to polyurea-modified reinforced gypsum boards of gypsum (semi-hydrate), if appropriate reinforcing mater...

A resonant tag circuit with at least one resonant frequency operates in an electronic security system in which the tag circuit is detected and electronically deactivated in order to destroy the resonant characteristics of the tag circuit at the detection frequency. The tag circuit is designed with capacitor plates 10, 12, 22, 24 which are located closer to one another at a selected point 20, 32. I...

The invention relates to new thermoprocessable copolymers of tetrafluoroethylene constituted by perfluoromethylvinylether (0.5-13% by weight), a fluorinated dioxole (0.05-3%) and tetrafluoroethylene (difference to 100%), particularly useful for coating electric cables by melt extrusion. It relates also to new perfluorodioxoles of formula wherein RF is a C1-C5 perfluoroalkyl radical; X1 and...

PCT No. PCT/FI94/00304 Sec. 371 Date Jan. 4, 1996 Sec. 102(e) Date Jan. 4, 1996 PCT Filed Jul. 1, 1994 PCT Pub. No. WO95/01831 PCT Pub. Date Jan. 19, 1995A fluidized bed polymerization process in which a central mixing element sweeps the interior of the bed. The mixing element contains agitator arm which pass adjacent to the reactor walls and a have a perforated surface. Gas is directed to the cen...

The invention relates to a method and a device for the preparation of a solution, emulsion or suspension of a sensitive medicament in an aqueous medium and a following injection thereof. In the method of the invention, a dual-chamber cylinder ampoule (1) known per se is used for the mixture of the aqueous medium (11) and the medicament (10), the aqueous medium (11) being made to flow calmly from b...

La presente invención se refiere a procedimiento para la preparación de un peptido que tiene propiedades inmunológicas en común con las del esqueleto peptídico de la glicoproteína de envoltura de los viruos de la clase HIV-2, y que tiene igualmente una estrucutra peptídica en común con el esqueleto peptídico de la glicoproteína de SIV-1, caracterizado porque comprende las etapas siguientes: -conde...

The invention is directed to an apparatus and method for predicting the number of bits which must be taken into account to normalize the result of a floating point addition or subtraction. The apparatus and method employ: a low precision floating point adder/subtractor, a priority encoder that determines the position of the most significant non-zero bit to generate the normalization amount and pre...

Two consecutive instructions are transferred from the main memory of a computer to an instruction fetch unit. Each instruction comprises an op code, an operand, and an address field for indicating the address of the next instruction. The two instructions comprise the current instruction and the next sequential instruction, when the next sequential instruction is a branch instruction, the branch is...

The invention relates to a tubular bundle of a number of plastic pipes running parallel to one another. The individual pipes are in this case held together by flexible strips. The strips run on one side tangentially over the width of the tubular bundle and are firmly connected to defined surface regions of the individual pipes. The individual pipes can be held by the strips next to one another, at...

La presente invención se refiere a una película polimérica que tiene una pluralidad de pequeñas aberturas y que comprende una capa superior y una capa inferior, caracterizada porque la capa superior comprende un primer material polimérico y la capa inferior comprende un segundo material polimérico, teniendo el primer material polimérico un punto de fusión que es mayor que el punto de fusión del se...

A net shaped ceramic-reinforced aluminum matrix composite is formed by forming a permeable mass of ceramic material (10) with a defined surface boundary having a barrier, and contacting a molten aluminum-magnesium alloy (20) with the permeable mass of ceramic material (10) in the presence of a gas comprising from about 10 to 100 % nitrogen, by volume, balance nonoxidizing gas, e.g. hydrogen or arg...

The optical system comprises: - a light source (1); - a first lens (3) intended to produce a parallel light beam (2b) from the beam (2a); - a semi-reflecting element (4) placed in the path of the said parallel beam (2b); - a second focusing lens (7), which receives the parallel beam (2c) reflected by the said element (4) and which can be moved parallel to the direction of propagation of the sa...

In the arrangement, a directing path is formed for a fibre-optics cable by means of tubular cable guides (2a, 2b) which are fastened on a supporting panel (5) by means of elements (4a to 4d). In a corresponding manner, there can be mounted at the other end of the guides (2a, 2b) a fibre guide (3) by means of which the minimum degree of bending of the fibre cable can be determined.

A biological rotor for biomass treatment in a sewage treatment plant is erected from sector shaped packs removably attached between spider-like support assemblies each of which comprises a ring and radial channel-shaped arms. The packs include support members. One of the support members has its ends located in the channels of the arms and the other support members are clamped to the ring. A separa...

A highly absorbent and flexible calendered and perf-embossed cellulosic pulp fluff sheet for use in disposable absorbent products such as sanitary napkins, wound dressings, bandages, incontinence pads, disposable diapers and the like. The invention also extends to a method for manufacturing the highly absorbent and flexible pulp fluff sheet and its method of use in disposable absorbent products. <...

PURPOSE:To prevent the deviation of the optical axis of optical parts due to welding by notching a holding member, to which optical parts which have the optical axis adjusted are inserted and fixed, at both end parts and fixing optical parts to the holding member in a position, where the clearance between optical parts and the holding member is small, by welding. CONSTITUTION:Optical parts 21 are ...

PCT No. PCT/SE94/00667 Sec. 371 Date Jan. 31, 1996 Sec. 102(e) Date Jan. 31, 1996 PCT Filed Jul. 5, 1994 PCT Pub. No. WO95/01846 PCT Pub. Date Jan. 19, 1995The invention relates to a roll screen having variable screening apertures having axle-fitted rolls which are spaced at adjustable distances apart and a device for adjusting this spacing. The roll spacing adjusting device functions to act on al...