Standard reversible transducer (USRD type E37) for high frequencies to 2.0 MHz at hydrostatic pressures to 20.7 kPa (3000 psi)

Thermoelastic effect in liquid mercury at high hydrostatic pressures

The rapid deformation of liquid and solid materials usually results in temperature changes. This rapid deformation is considered to be a nearly adiabatic process where the heat generated during the deformation changes the temperature of the material. Early experiments showed that metals cooled down on sudden stretching and warmed up upon compression [1]. In 1805, Gough [2] observed that the tem...

Single acetylcholine receptor channel currents recorded at high hydrostatic pressures.

A technique for performing patch-clamp experiments under high hydrostatic (oil) pressure is described. The method allows the transfer of whole cell or membrane patches in a recording configuration into a pressure vessel, where pressure can be increased up to 60 MPa (approximately equal to 600 bar). We have studied in this way the pressure dependence of single acetylcholine receptor channels in ...

Ac-dc transfer standard shunts for frequencies up to 1 MHz

A new type of coaxial shunt for high frequency ac-dc current transfer standards has been designed. The structure of the shunts with nominal current from 100 mA to 5 A are made of a disk with two coaxial conductive layers in one side. SMD resistors are soldered in parallel between the two layers. Two conductive screens are applied in both side of the disk. In order to reduce stray effects, the s...

Investigation of single-exposure microwave ocular effects at 3000 MHz.

1 0 Ja n 20 06 Superconductivity at 17 K in Yttrium Metal under Nearly Hydrostatic Pressures to 89 GPa

In an experiment in a diamond anvil cell utilizing helium pressure medium, yttrium metal displays a superconducting transition temperature which increases monotonically from T c ≃ 3.5 K at 30 GPa to 17 K at 89.3 GPa, one of the highest transition temperatures for any elemental superconductor. The pressure dependence of T c differs substantially from that observed in previous studies under quasi...