A novel process for the production of mouldings having a density of at least 250 kg/m<3> from polyurethane foams having a compact surface by foam moulding a polyurethane-forming starting mixture using organic carboxylic acids as the blowing agent, and the mouldings obtained by this process.

IMPEDANCE CROSS CORRELATION LOGGING TOOL The logging tool comprises a gas void fraction measurement section (37) consistinh of a first set (37) of eight longitudinal electrodes (38! extending parallel to the longitudinal axis of the tool and positioned and regularly spaced around said longitudinal axis, a sleeve (40) made of dielectric material and located in contact and around the electrodes for ...

METHOD AND APPARATUS FOR DETERMINING A CHARACTERISTIC OF THE MOVEMENT OF A DRILL STRING The invention is related to a method of determining the instantaneous rotation speed of a drill string or a drill bit in a borehole or the lateral shocks applied to the string or bit. The centripetal acceleration of the drill string is measured at at least two opposite ends of a drill string diameter so as to o...

Novel derivatives of lysophingolipids free from sialic acids which are N-acyllysosphingolipids having one of the two formulae: in which -A- stands for the group -CH=CH- or -CH2-CH2-, n1 is a whole number of between 6 and 18, n2 a whole number of between 11 and 15, X is a hydrogen atom or the residue of a monosaccharide or a disaccharide or phosphorylcholine and R represents an alkyl radical...

Novel N-acyl-lysogangliosides obtained from gangliosides by deacyation of the ceramide group, wherein the acyl group is derived from an aliphatic acid having from 2 to 24 carbon atoms, substituted by one or more polar groups. The N-acyl-lysogangliosides of the invention exhibit an inhibiting action on protein-kinase C activation and, thus, can be utilized in therapies for various pathologies of th...

HOE 88/F 347 Ceramic/fiber composite and process for its production The invention relates to a ceramic/fiber composite and a process for its production. The process comprises impregnating fibers with a molten polysilazane in a first step, converting the polysilazane in the fibers into the infusible state in a second step and, in a third step, heating the impregnated fibers to 800 to 2000.degree.C ...

HOE 88/F 346K : High-strength ceramic composite, process for its preparation and its use The invention relates to a high-strength ceramic composite, in particular made from silicon nitride, a process for its preparation and its use. The process comprises impregnating an open-pore matrix with a molten polysilazane in a first step and, in a second step, heating the impregnated matrix to 800 to 2500....

PCT No. PCT/FI89/00210 Sec. 371 Date Jul. 18, 1990 Sec. 102(e) Date Jul. 18, 1990 PCT Filed Nov. 15, 1989 PCT Pub. No. WO90/06274 PCT Pub. Date Jun. 14, 1990.The invention concerns a method in handling of returnable bottles (P), wherein the returnable bottle is dropped vertically from an upper space (E1) into a lower space (E2) and wherein the returnable bottle is transferred from the drop space (...

A gaseous feed of oxygen containing both light and heavy impurities is introduced through inlet 50 into a first liquid-vapour contact column 10 thereby producing a first fraction having an enhanced concentration of heavy impurities and a second fraction having a reduced concentration of heavy impurities. A gaseous first stream of the second fraction is condensed in a condenser 54 and returned to t...

The present invention is directed to a process for producing a finely divided dispersible boehmite (alpha-alumina monohydrate) from coarse grain particles of aluminum trihydroxide. The aluminum trihydroxide is subjected to calcination in an amount sufficient and for a time sufficient to produce very fine boehmite particles embedded in a matrix chi-alumina, with the matrix material dissolved in eit...

In the automated production line manufacture of nuclear fuel bundle spacers, rod-supporting ferrules are cut from tubular stock, checked for length, laser cut to create predetermined features in the ferrule sidewall, formed with rod-centering stops in the ferrule sidewall, and checked for stop height dimensional accuracy. Pairs of ferrules are subassembled with a captive spring and assembled into ...

In the automated production line manufacture of nuclear fuel bundle spacers, rod-supporting ferrules are cut from tubular stock, checked for length, laser cut to create predetermined features in the ferrule sidewall, formed with rod-centering stops in the ferrule sidewall, and checked for stop height dimensional accuracy. Pairs of ferrules are subassembled with a captive spring and assembled into ...

A malt extract of high colouring power of from 20,000 to 25,000 EBC units is obtained by heating a mixture of an initial malt extract and comminuted green malt and/or comminuted malt and/or aqueous extracts of comminuted green malt and/or comminuted malt at a temperature of from 90 to 120 DEG C, preferably 105 to 112 DEG C, over a period of, preferably, 9 to 12 hours, without other additives, and ...

The invention concerns a cardboard applicable for aseptic packaging. The dry strength in the cardboard is improved by ordinary starch sizing, as well as its wet strength by a likewise ordinary hydrophobic sizing. To better withstand peroxide treatment included in aseptic packaging processes, the cardboard is bulk-sized with a size based on an alkylsuccinic acid anhydride.

A device for network distribution equipment contains a door or a lid which gives access to connection equipment and a transformer in a network station. The door or the lid is equipped with a lock device which activates a switch, such as the switch S1, when the equipment is to be serviced. On the secondary side of the transformer there is a detection unit F2, F3, F4 arranged in each phase for detec...