1,1,1,4,4,4-Hexafluorobutane is used as a blowing and insulating gas in the production of plastic foams, preferably isocyanate-based foams, in particular in the production of polyurethane foams.

1,1,1,4,4,4-Hexafluorobutane is used as a blowing and insulating gas in the production of plastic foams, preferably isocyanate-based foams, in particular in the production of polyurethane foams.

Electrode used for one pole in underwater transmission of high-voltage direct current, an insulated cable being used for the other pole, such electrodes being adapted to be stationary on the bottom of the sea to serve as the anode and the cathode, respectively, while the sea-water constitutes the electric conductor therebetween. What characterises the invention is that the electrode comprises at l...

This invention relates to novel N-derivatives of 1-deoxy-nojirimyoin, to the processes for their preparation and to their end-use applications, particularly as to their use in the treatment of diabetes.

A male absorbing incontinence guard comprises a drop collector having a lower and an upper wall part (1, 2) for arrangement below and above the penis, respectively, the lower wall part (1) having a shorter length than the upper wall part (2), and with a free edge (3) defines an opening. Each wall part (1, 2) comprises an absorbing body (4, 5) and, fastened thereupon, a liquid-tight barrier sheet (...

Polycrystalline silicon rod capable of providing within no more than two floating zoning passes, unicrystalline silicon exhibiting a resistivity of at least 10,000 ohm-cm (donor) and a lifetime of at least about 10,000 milliseconds, exhibits a copper X-ray diffraction pattern having a peak at 26.85+/-0.25 DEG (2 THETA ) and has less than 15 ppta boron and less than 20 ppta phosphorus.

A zinc-alkaline battery comprises a cathode, an electrolyte consisting of an aqueous alkali solution and an anode, in which the active material of said anode is a zinc alloy containing zinc as the principal component, 0.01-0.5 wt.% Ni, and 0.01-0.5 wt.% of at least one element selected from In, Pb, Ga or Cd. Weight is to the total of the alloy.

An inventive vacuum interrupter exhibits a high interruption performance. The interrupter includes a metal end plate constituting part of its vacuum envelope, and a coil disposed outside the vacuum envelope and near the metal end plate and generating an axial magnetic field parallel to a path of an arc in an arcing gap between a pair of separable contact within the vacuum envelope. The contact nea...

The invention is a method of determining the acoustic velocity of a drill string (28) in a borehole (10). An acoustic signal is generated at a first location(34) along the drill string, and detected at a second location (7). The detected signal is autocorrelated and the time of occurrence of multipath reflections on the autocorrelation record is utilized to determine acoustic velocity.

Pulp mill effluent streams having a pH greater than 7.0 are decolourized by reducing the acidity of the effluent to below pH 4.0 so that colour bodies are precipitated from the effluent. The effluent is filtered and organic compounds are absorbed from the filtrate on carbon particles which are regenerated by a caustic solution.

A process for producing dimethylamine is provided, comprising reacting methanol and/or dimethylether and ammonia, in amounts sufficient to provide a carbon/nitrogen (C/N) ratio from about 0.2 to about 1.5, and at a temperature from about 250 DEG C. to about 450 DEG C., in the presence of a catalytic amount of a modified acidic zeolite selected from the group consisting of chabazite, erionite, ZK...

A slide switch comprises a casing, fixed contacts, a plurality of terminals, a cover plate, slide members and movable contacts. A seal member is disposed between the inner side face of the cover plate and side face of the slide members, and is pressed between the slide member and the cover plate for sealing between the inner and outer portions of the casing. When the seal member is not in a posit...

The solid state image sensor comprises photosignal detecting regions formed in the surface of semiconductor substrate. Charge transfer regions are formed in the surface of the semiconductor substrate with intervals from the photosignal detecting regions for transferring signal charges. Gate electrodes are formed over the charge transfer regions and over regions between the photosignal detecting ...

An electrode securement sheet for securing, to the skin surface of a living body, an electrode held in close contact with the skin surface for deriving a weak current from the living body, is disclosed. The sheet comprises a substantially circular electrode securement section, which is to be secured to the skin surface to cover the electrode. A lead securement section extends integrally from the e...

An electrode securement sheet for securing, to the skin surface of a living body, an electrode held in close contact with the skin surface for deriving a weak current from the living body, is disclosed. The sheet comprises a substantially circular electrode securement section, which is to be secured to the skin surface to cover the electrode. A lead securement section extends integrally from the e...

The driver eliminating the phase changing capacitors has two transistors which are connected in common with the input and output terminals coupled to their respective sources so that the output voltage level follows the input level. A current mirror (3) provides the first transistor (T5) with a current in proportion to the second current being determined by the output voltage and the load value. ...

Semiconductor photodetector comprises layers of INP ; GaInAs and INP formed succesively on an substrate by vapour phase epitaxy, the lattice constant of the second layer being larger than that of the first at room temp. The lattice mismatching degree between the second and first layers is pref. 0-0.20%.

The invention relates to an automatic gain controlled electronic ballast system for fluorescent lighting tubes designed to reduce or eliminate flicker or fluctuating light output. In one embodiment the gain controlled electronic ballast system (10) includes a filter network (111) which is connected to the power source (112) for establishing a substantially constant voltage signal and suppressing h...

PCT No. PCT/DK89/00129 Sec. 371 Date Nov. 30, 1990 Sec. 102(e) Date Nov. 30, 1990 PCT Filed May 18, 1989 PCT Pub. No. WO89/12024 PCT Pub. Date Dec. 14, 1989.Flue gases etc. may contain SO2 which should be prevented from admission to the atmosphere. SO2 is oxidized to SO3 and condensed with steam to H2SO4-vapors which are condensed in vertical glass tubes cooled from the outside. In principle the c...

The IC includes a NMOS formed on P-type wall region (11) in P-type base plate (10) and a PMOS formed on N-type base plate (10). Thin gate silicon dioxide layers (16,26) are grown on NMOS and PMOS regions. N-type buried layer (18) is formed by injecting ion in N- MOS layer and multi-crystal silicon layers (17,27) are grown by vaporising on gate silicon dioxides (16,26). Source region (13) and dr...