A process for producing silicon in which a reaction mixture consisting, on the one hand, of hot-pressed briquettes of silicon dioxide (quartz) and carbon and, on the other hand, of granular quartz are introduced into an electric furnace and reacted so that silicon carbide is produced from the agglomerates and the silicon carbide then reacts with the quartz which fuses from the granular quartz to p...

In a skinning machine for double fillets of fish, in which fillets the fish strip containing the fin holders of the dorsal fins has already been separated up to the inside of the skin, a drum is arranged, against whose circumferential surface the double fillet is clamped by penetration of two round belts which surround part of the drum and penetrate into the said separation. Supported by flat belt...

Solventless organopolysiloxane compositions are well adopted as coating/impregnating materials for a wide variety of substrates to provide, e.g., water repellant/solvent resistant gaskets and various substrates possessing enhanced non-stick characteristics, are comprised of (i) an alpha , omega -dihydroxypolydiorganopolysiloxane having a viscosity, measured at 25 DEG C., ranging from 5 to 100,00...

In order to detect movements of a body to be examined in a nuclear spin tomograph, use is made of a high-frequency coil arrangement whose magnetic field acts on the body. If the impedance of the coil is measured at the resonance frequency to which it - possibly together with a capacitor - is tuned, the result is a strong dependence on the respective movement phase of the body. A signal characteris...

A microprogrammed processor in which instructions have alternative fast and slow microprogram sequences. The fast sequences are designed for speed, and can detect exception conditions but do not resolve them. The slow sequences perform all the necessary tests to resolve these conditions. When a fast sequence detects an exception, that sequence is abandoned, and the corresponding slow sequence is r...

A central processor for a general-purpose digital data processing system. The processor has a pair of caches, an operand cache for operands and an instruction cache for instructions, as well as a plurality of execution units, where each execution unit executes a different set of instructions of the instruction repertoire of the central processor. An instruction fetch unit fetches instructions from...

A description is given of new doxorubicin derivatives of general formula (I), in which R is a radical of formula (II) in which R1 is hydrogen, alkyl (optionally substituted with amino, alkylamino, dialkylamino, hydroxy, mercapto or methylthio), phenyl or benzyl, (optionally substituted with one or two hydroxyl groups), and R2 is hydrogen or, with R1, forms an alkylene radical, their preparation, t...

The transmitter/measurement coil of a nuclear magnetic resonance tomography apparatus for medical diagnosis in which comparatively high Larmor frequencies are used, is divided into a number of parallel-connected subcoils. The self resonance frequency of the coil can thus be made substantially higher than the Larmor frequency, with the result that the coil will have a suitably improved quality fact...

A process for the hydrotreatment of a heavy hydrocarbon fraction containing sulfur and metal impurities comprises at least two steps: a first step using a catalyst comprising a low proportion of at least one metal of groups V, VI and VIII, said catalyst being in the form of a plurality of juxtaposed agglomerates each formed of a plurality of acicular plates, the plates of each agglomerate being ge...

Anthracycline glycosides of the general formula (A): (A) wherein X is hydrogen or hydroxy and R is hydrogen or a methyl or a hydroxymethyl group; and their pharmaceutically acceptable salts; are useful as antitumor agents.

A method for the selective methylation of the hydroxy group at the 6-position of erythromycin A derivatives which comprises reacting a compound represented by the formula R-X (wherein R is a 2-alkenyl group, a benzyl group or a substituted benzyl group, and X is a halogen atom), reacting the resulting quaternary salt compound with a methylating agent, and then eliminating R groups of the resulting...

A cranial screw (10) transparent to X-ray or magnetic fields so that it is compatible with CT or MR scanning techniques. The screw (10) has a hollow shank (12) with a threaded distal portion (22) for insertion into a hole in the cranium and an emergency removal drive (14) head spaced proximally from an insertion drive head (16) by a frangible connecting portion (18), so that if excessive torque is...

A process is disclosed for the dealkylation of durene resulting from a methanol to gasoline conversion by contacting a durene-containing fraction with zeolite ZSM-12 at elevated temperatures and pressures.

A nitrosourea compound of the formula: wherein R1 is lower alkyl and R2 is lower alkyl or lower alkoxy-lower alkyl, which may be prepared by nitrosation of a compound of the formula: wherein R1 and R2 are the same as defined above. Said nitrosourea compound is useful as an anti-tumor or anti-leukemic agent.

A group of new daunorubicin and doxorubicin derivatives is disclosed. These materials have the formula (I) wherein R is CO-CH3 or CHOH-CH3 in the case of daunorubicin derivatives or CO-CH2OH or CHOH-CH2OH in the case of doxorubicin derivatives; X is O or NH; and A is either a cyano group (CN) or a hydrogen, subject to the limitation that when X is O, A must be a cyano group. When A is...

A capacitive motion sensor placed under a mattress or the like for monitoring the movements of a person. The sensor uses an active layer consisting of two courses of dielectric material placed in contact with one another. Movements of a person on top of the mattress cause the courses to move relative to one another, thereby generating an electric change in the active layer which is detected by a p...

Flocced mineral materials, which may be utilized to prepare high temperature and water resistant articles, are prepared by treating a gellable layered swollen silicate that has an average charge per structural unit from -0.4 to -1 and which contains interstitial cations which promote swelling with a source of at least one species of multiamine derived cations.

Matières minérales floculées qui peuvent etre utilisées pour préparer des articles résistant à haute température, résistant à l'eau. Ces matières sont préparées en utilisant comma matière de départ, un silicate gonflé en couches gélifiables qui a une charge moyenne par motif structural allant d'environ -0,4 à 1 et qui contient des cations intersticiels qui favorisent le gonflement avec une source ...