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...

The invention relates to epoxy resins reinforced with aramid fibres, in which the adhesion between the fibres and the resin is improved by pretreatment of the fibres with organosilanes.

The invention relates to epoxy resins reinforced with aramid fibres, in which the adhesion between the fibres and the resin is improved by pretreatment of the fibres with organosilanes.

A buffer storage system for a pipeline processor, set up with at least an operand access buffer storage and an instruction fetch buffer storage. The buffer storages cooperate with store address registers and store data registers, to assume a store-through method between the buffer storages and a main storage. A feedback means is mounted between the buffer registers and the store address/data regis...

New polyether antibiotic A80190, its acyl and alkyl ester, acyl ester and urethane derivatives, and salts thereof, are useful antibacterial and anticoccidial agents and increase feed-utilization efficiency in animals. Methods of making A80190 by culture of Actinomodura oligospora NRRL 15877 or NRLL 15878 and synergistic compositions of the A80190 compounds with nicarbazin, 4,4 min -dinitrocarbanil...

A process for the recovery of silicone oil and chlorobenzenes from a mixture containing silicone oil, chlorobenzenes, and polychlorinated biphenyls comprising: (a) introducing the mixture into a distillation zone at a temperature and a pressure, which will cause the chlorobenzenes to flash overhead and the mixture of silicone oil and polychlorinated biphenyls to pass to the bottom of the zone; a...

A process for the recovery of silicone oil and chlorobenzenes from a mixture containing silicone oil, chlorobenzenes, and polychlorinated biphenyls comprising: (a) introducing the mixture into a distillation zone at a temperature and a pressure, which will cause the chlorobenzenes to flash overhead and the mixture of silicone oil and polychlorinated biphenyls to pass to the bottom of the zone; a...

1-Sulfo-2-oxoazetidine derivatives of the general formula (I) wherein R1 is amino group which may optionally be acyiated or protected, X is hydrogen or methoxy, and R4 is azido, a halogen, amino group which may optionally be acylated or a group of the formula -OR5, or -S-S-R5 in which R5 is an organic residue and n is 0, 1 or 2, or a pharmaceutically acceptable salt thereof, or a...

The invention relates to a device (1) for the separation of impurities from gases, comprising a housing (2) with an inlet (E) and an outlet (A) and a plurality of filter elements (19, 19'; 32, 33, 33') which are mounted in the housing (2) and divided into first and second filter stages (30, 31). The filter stages (30, 31) are in flow communication and each have flow elements (18, 23, 34, 38, 38') ...

The invention relates to a device (1) for the separation of impurities from gases, comprising a housing (2) with an inlet (E) and an outlet (A) and a plurality of filter elements (19, 19'; 32, 33, 33') which are mounted in the housing (2) and divided into first and second filter stages (30, 31). The filter stages (30, 31) are in flow communication and each have flow elements (18, 23, 34, 38, 38') ...

The present invention relates to a device and a method for chromatographic separation with a chromatographic fixed bed as a dry packing in a closed column or as a dry layer on a foil or plate. The fixed bed has a high volume portion of gas- filled intra-particle and extra-capillary spaces and consists entirely or predominantly of vesicular or cellular carriers. The intrinsically absorbent fixed be...

The present invention relates to a device and a method for chromatographic separation with a chromatographic fixed bed as a dry packing in a closed column or as a dry layer on a foil or plate. The fixed bed has a high volume portion of gas- filled intra-particle and extra-capillary spaces and consists entirely or predominantly of vesicular or cellular carriers. The intrinsically absorbent fixed be...