Vinylcephalosporins of the formula (I) in which the symbols R<1>, R<2>, R<3>, R<4> and R<5> have the meaning given in the description.

Vinylcephalosporins of the formula (I) in which the symbols R<1>, R<2>, R<3>, R<4> and R<5> have the meaning given in the description.

An acoustic method and apparatus for investigating an earth formation penetrated by a borehole are described. Acoustic transducers are mounted on a tool to accurately determine the distance between a segment of the tool and the wall of the borehole. The acoustic transducers are positioned in such manner that the stand-off distance between individual resistivity measuring electrodes in an array, wh...

Ethylene glycol is prepared by a process in which ethylene oxide is extracted from an aqueous solution with near-critical or super-critical carbon dioxide. Thereafter an ethylene oxide-carbon dioxide-water mixture is contacted with a catalyst to form ethylene carbonate, which is then hydrolyzed to ethylene glycol in the presence of the same catalyst. The ethylene glycol is separated as product and...

A four-wheel-drive system for a vehicle, comprising a power unit having an output shaft in a lateral direction of the vehicle, a power transmission gear unit having input and output shafts parallel with the output shaft of the power unit, a speed reduction gear to be driven by the transmission output shaft, two final reduction gear units one of which is arranged for driving the front road wheels a...

An apparatus for making a rotationally symmetrical body formed of crisscross-wound layers includes a winding mandrel, a carriage reciprocating along the mandrel and a thread laying assembly mounted on the carriage. The assembly has a pivotal device, and four thread laying rollers mounted for rotation on the pivotal device. The shafts of the rollers extend parallel to one another and are situated a...

A techniqu for producing measurements of physical characteristics of subsurface media near a borehole penetrating the earth is disclosed that uses multiple transducers positioned along a borehole tool. A number of transducers of a first type, such as transmitters, are separated from each other along the tool by a preselected separation, and a number of transducers of a second type, such as recei...

A surgical catheter (10) is disclosed, comprising a distal end (20) for advancing into a blood vessel at a single incision remote from occlusions, a proximal end (16, 18) for manipulating the catheter ex vivo, a body portion (23) connecting the two ends, and means (40) adjacent the distal end for cutting away such occlusions while the distal end is far removed from the incision, the cutting means ...

A catheter assembly (10) especially designed for the performance of atherectomy procedures which includes a guide catheter (12) having an inflation balloon (20) disposed on the distal end portion thereof, the guide catheter being dimensioned to receive in its lumen an elongated drive tube (16) having an annular cutting tip (22) affixed to the distal end thereof. A rotational drive mechanism is cou...

PURPOSE:To generate strong ultrasonic vibration, by interposing a separation ring between the first and second piezoelectric element groups and clamping all of them between a horn base and a back block by a bolt shaft. CONSTITUTION:A separation ring 32 is interposed between the first and second piezoelectric element groups 30, 40 and all of them are clamped between a horn base 10 and a back block ...

A process for simultaneously disposing of refuse and producing a useful fuel or synthesis gas and an inert inorganic residue by feeding shredded refuse, from which ferrous metal has preferably been magnetically separated, and which has been compacted into hard pellets, into an oxygen fed pyrolizing, slagging shaft furnace.

A process of preparing shaped products starting from dispersions which contain at least one coagulable, amphoteric high molecular substance by passing the dispersion through an extruder into a coagulation bath which may be provided with electrodes whereby the coagulation is effected by a change in pH such that the isoelectric point of the substance is passed and care is taken that the dispersion c...