Abstract: A sample module for use in a downhole tool includes a sample chamber for receiving and storing pressurized fluid. A piston is slidably disposed in the chamber to define a sample cavity and a buffer cavity, and the cavities have variable volumes determined by movement of the piston. A first flowline is provided for communicating fluid obtained from a subsurface formation through the sample module. A second flowline connects the first flowline to the sample cavity, and a third flowline connects the first flowline to the buffer cavity for communicating buffer fluid out of the buffer cavity. A first valve capable of moving between a closed position and an open position is disposed in the second flowline for communicating flow of fluid from the first flowline to the sample cavity. When the first valve is in the open position, the sample cavity and the buffer cavity are in fluid communication with the first flowline and therefore have equivalent pressures.

Abstract: A man portable hydrogen source, the source comprising one or more hydrogen generating elements (2), an ignition control system (3) and a pressure vessel (1). Each hydrogen generating element comprises a pellet holder (7) provided with one or more recesses and a thermal insulation layer (9) to reduce heat transfer to adjacent hydrogen generating elements; wherein at least one recess contains a pellet (8) of a chemical mixture which on thermal decomposition evolves hydrogen gas; wherein the ignition control system comprises one or more ignitors (14), associated with an individual pellet (8), and activation means to activate the ignitors; and wherein the evolved hydrogen and hydrogen generating elements are contained within the pressure vessel.

Abstract: A sample module for use in a downhole tool includes a sample chamber for receiving and storing pressurized fluid. A piston is slidably disposed in the chamber to define a sample cavity and a buffer cavity, and the cavities have variable volumes determined by movement of the piston. A first flowline is provided for communicating fluid obtained from a subsurface formation through the sample module. A second flowline connects the first flowline to the sample cavity, and a third flowline connects the sample cavity to one of the first flowline and an outlet port. A first valve is disposed in the second flowline for controlling the flow of fluid from the first flowline to the sample cavity, and a second valve is disposed in the third flowline for controlling the flow of fluid out of the sample cavity, whereby any fluid preloaded in the sample cavity may be flushed therefrom using the formation fluid in the first flowline and the first and second valves.

Abstract: A sample module for use in a downhole tool includes a sample chamber for receiving and storing pressurized fluid. A piston is slidably disposed in the chamber to define a sample cavity and a buffer cavity, and the cavities have variable volumes determined by movement of the piston. A first flowline is provided for communicating fluid obtained from a subsurface formation through the sample module. A second flowline connects the first flowline to the sample cavity, and a third flowline connects the first flowline to the buffer cavity for communicating buffer fluid out of the buffer cavity. A first valve capable of moving between a closed position and an open position is disposed in the second flowline for communicating flow of fluid from the first flowline to the sample cavity. When the first valve is in the open position, the sample cavity and the buffer cavity are in fluid communication with the first flowline and therefore have equivalent pressures.

Abstract: Novel compounds of Formula (1) and esters, salts, and physiologically functional derivatives thereof are disclosed. Methods for preparing and using the compounds are also disclosed. Many of these compounds are selective activators of PPAR alpha. The compounds are particularly useful for treating obesity.

Abstract: Oxazole compounds having formula (I) wherein R.sup.1 and R.sup.3 are selected from the group consisting of hydrogen, hydroxy, C.sub.1-6 alkyl, C.sub.1-6 alkoxy, C.sub.1-6 alkoxyC.sub.1-6 alkyl, phenyl or phenyl mono- or disubstituted with C.sub.1-6 alkyl, halogen, hydroxy, C.sub.1-6 alkoxy, aminosulfonyl, hydroxyC.sub.1-6 alkyl, C.sub.1-6 alkylsulfonylaminoC.sub.1-6 alkyl or carbamylC.sub.1-6 alkylaminosulfonyl; R.sup.2 is selected from hydrogen, C.sub.1-6 alkyl, hydroxyC.sub.1-6 alkyl, C.sub.1-6 alkoxy, C.sub.1-6 alkoxyC.sub.1-6 alkyl or (fluorinated C.sub.1-6 alkyl)oxyC.sub.1-6 alkyl; W is a C.sub.1-6 alkylene chain or nitrogen; m is independently the integer 0 or 1; X is CH or nitrogen, provided that when W is nitrogen then X is CH; q is independently an integer selected from the group consisting of 1, 2, 3 or 4; or a pharmaceutically acceptable acid-addition or base-addition salt thereof, pharmaceutical compositions containing them and their use in therapy.