Boron carbide is one of the lightest and hardest ceramics, but its applications are limited by its poor stability against a partial phase separation into separate boron and carbon. Phase separation is observed under high non-hydrostatic stress (both static and dynamic), resulting in amorphization. The phase separation is thought to occur in just one of the many naturally occurring polytypes in ...

The orographic gravity wave drag produced in flow over an axisymmetric mountain when both vertical wind shear and non-hydrostatic effects are important was calculated using a semi-analytical two-layer linear model, including unidirectional or directional constant wind shear in a layer near the surface, above which the wind is constant. The drag behaviour is determined by partial wave reflection...

ZoBell and Morita (1957) demonstrated the existence of barophilic bacteria in various deeps and trenches of the Pacific and Indian Oceans where hydrostatic pressures up to 1,100 atm exist. However, the relationship between hydrostatic pressure and the activity of life in the deep sea is still unknown. Johnson et al. (1954), for convenience of discussion, divided hydrostatic pressure into modera...

Our study focused on evaluation of pollution from newly developed synthetic, biodegradable fluid MOL Farm UTTO Synt, produced by Slovnaft Company, member of MOL Group, Hungary. Fluid was subject of accelerated test in laboratories owned by Department of Transport and Handling, Faculty of Engineering, Slovak University of Agriculture in Nitra. Accelerated laboratory test was realized by cyclic p...

Optic nerve head astrocytes become abnormal in eyes that have elevated intraocular pressure, and cultured astrocytes display altered protein expression after being subjected for > or = 1 days to elevated hydrostatic pressure. Here we show that 2-h elevated hydrostatic pressure (15 or 30 mmHg) causes phosphorylation of ERK1/2, ribosomal S6 protein kinase (p90(RSK)), and Na/H exchanger (NHE)1 in ...

Desulfovibrio piezophilus strain C1TLV30(T) is a piezophilic anaerobe that was isolated from wood falls in the Mediterranean deep-sea. D. piezophilus represents a unique model for studying the adaptation of sulfate-reducing bacteria to hydrostatic pressure. Here, we report the 3.6 Mbp genome sequence of this piezophilic bacterium. An analysis of the genome revealed the presence of seven genomic...

Effects of magnetic fields and hydrostatic presswes on the isothermal martensitic transformation, whose nose temperature is about 140% in an Fe-25.ONi-4.OCr alloy ( mass% ) has been examined by applying magnetic fields up to 30MA/m and hydrostatic presswes up to 1.SGPa The obtained results are the following: The martensitic transformation is induced instantaneously ( less than 20psec.) under pu...

PURPOSE The response of cells (e.g., optic nerve head [ONH] cells) to mechanical stress is important in glaucoma. Studies have reported the biological effects of hydrostatic pressure on ONH cells cultured on a rigid substrate. An apparatus, designed to independently vary hydrostatic pressure and gas tension (including oxygen tension) in culture medium, was used to evaluate the effects of pressu...

The “Montserrat-2000” severe flash flood event which occurred over Catalonia on 9 and 10 June 2000 is analyzed. Strong precipitation was generated by a mesoscale convective system associated with the development of a cyclone. The location of heavy precipitation depends on the position of the cyclone, which, in turn, is found to be very sensitive to various model characteristics and initial cond...