Mercury is removed from an industrial effluent by treating the effluent with a sulphide or hydrosulphite of an alkali metal in the presence of a flocculant at a pH of from 7 to 12 so as to precipitate an alkaline sludge containing precipitated mercuric sulphide and flocculated material, treating the alkaline sludge with effluent to redissolve the flocculated material but not the mercuric sulphide,...

In a process for the thermal after-treatment of paste-forming homo- or copolymers of vinyl chloride, obtained by aqueous emulsion polymerization, followed by spray-drying to produce a spray-dried powder, an improvement is provided wherein 20 to 60 percent by weight of the spray-dried powder is warmed for 1 second to 30 minutes to a treating temperature of 75 DEG -110 DEG C., and then is recombine...

A gas discharge display device comprising a gas-filled, -gas-tight enclosure, an insulating matrix member dividing the housing into two chambers and comprising an insulating plate having a plurality of apertures therethrough, arranged in an array of rows and columns corresponding in number to a desired number of image points, a cathode electrode disposed in one chamber and extending parallel with ...

1516413 Multi-layered optical recording and playback E S JACOBS 4 Aug 1975 [21 Oct 1974] 32589/75 Heading G5R Information is recorded as discrete optical data spots of variable size in a plurality of layers 50 of a record 10. The recording may be reflective as shown, transmissive or photoluminescent, and playback is effected by a single beam 18. One layer 50 is selected for playback by means of a ...

PURPOSE:To form a membrane at a high speed while uniformity is held, by allowing reaction luminous flux to be incident to a substrate in parallel and passing said incident luminous flux along the substrate to be reflected by a reflective mirror while allowing the reflected liminous flux to be again incident to said substrate in parallel. CONSTITUTION:A substrate support part 8 for supporting a sub...

A crash barrier consists of a concrete block (10) with a light ballast enclosed in a cover (18). The ballast consists of undergraded light ballast and has internal voids (14). The light ballast concrete block consists of two parts (11, 12), namely, an upper part in the form of a light ballast concrete retainer with a bottom cavity and downward facing apertures and a lower part (12) in the form of ...

A building board is manufactured by the take-up method, using ground cellulosic and/or wastepaper fibres as carrier fibres, waste gypsum in dihydrate form as a filler and hydraulical cement as a bonding agent. Optional additives such as blast furnace slag are also described.

An electrical insulating oil having both high positive and high negative direct current breakdown voltage values is prepared by catalytically reforming a petroleum naphtha or similar feedstock and then fractionating or otherwise treating the reformed material to produce a highly aromatic oil which boils in the range between about 400 DEG and about 700 DEG F., contains less than about 1.0 weight ...

During treatment of a specimen (10) in an evacuated chamber, the temperature of the specimen is controlled by varying the radiant heat flux to and from the specimen. The specimen is supported adjacent to but spaced apart from a heat sink (14) with a blackened surface (16), and between the specimen (10) and the heat sink (14) are one or more reflective elements (20) movable so as to cover a larger ...

A method of scrubbing reaction products resulting from flame burning of fuels containing impurities such as sulfur compounds, chlorine compounds, and fluorine compounds. The scrubbing is accomplished by the addition to the fire chamber of additives which bind the impurities. The additives are supplied to the burner flame by way of a gaseous and/or liquid carrier medium flow, accompanied by the for...

Base part for load pallets, especially for load pallets of the type that comprise two or more base parts, possibly provided with recesses for the forks of a fork lift truck, having a number of holes across their longitudinally divided length and at a short distance from the upper surface of the base parts, through which tubes can be led under slight friction, so that the base parts are joined to o...

PCT No. PCT/SE85/00346 Sec. 371 Date May 8, 1986 Sec. 102(e) Date May 8, 1986 PCT Filed Sep. 13, 1985 PCT Pub. No. WO86/01786 PCT Pub. Date Mar. 27, 1986.Base member for pallets, especially for pallets of the type consisting of two or several base members, optionally provided with recesses for the forks of a fork lift truck, having a number of holes perpendicularly to their length direction, distr...

The invention provides for improved identification by making use of the existence of DNA regions of hypervariability, otherwise called minisatellite regions in which the DNA contains tandem repeat or quasi-block copolymer sequences and the number of repeats or copolymer units varies considerably from one individual to another. It has now been found that many such regions can be probed simultaneous...

PCT No. PCT/SE87/00233 Sec. 371 Date Oct. 26, 1988 Sec. 102(e) Date Oct. 26, 1988 PCT Filed May 12, 1987 PCT Pub. No. WO87/06819 PCT Pub. Date Nov. 19, 1987.A leg prosthesis with a tube (10), and adjusting head (11) arranged in the proximal end (4) of the tube. First means (16) allow adjustment of the angular attitude of the tube relative an imagined load line. Second means (12,13) allow translato...

A venting slide fastener stringer for use on a cushion, a pillow, etc. has a warp-knit stringer tape including a pair of laterally spaced, elongate webs with a wale-free region therebetween, and a connecting thread or threads having portions laid in opposed marginal wales in the webs and substantially parallel portions extending transversely across the wale-free region to interconnect the webs, th...

Safety mechanism for a lift or a similar transport device, provided with at least one wheel running via a rail, which safety mechanism is provided with at least one brake member in the form of a disc-shaped body rotatable eccentrically about its axis and having a knife edge which can be brought into contact with the rail by rotation of the body, there being a cam mechanism which, if the wheel exce...

Antibacterial 4 sec -epi-9-deoxo-9a-methyl-9a-aza-9a-homo-erythromycin A, pharmaceutically-acceptable salts thereof, pharmaceutical compositions comprising antibacterially-effectife amounts thereof, a method of treatment of bacterial infections with antibacterially effective amounts thereof, and intermediates for the synthesis thereof from erythromycin A.