excess pore pressure under seismic loadings has always been a main concern in geotechnical engineering practices. the phenomenon in soil can cause an effective stress and hence cause the shear strength of the soil to decrease considerably and large deformations to occur in the area. generally, increases in pore pressure occur in un-drained conditions. if it is formed, its consequences decrease ...

We combine high-resolution isotherms measurements and light scattering technics to study over a broad temperature range collective effects during the condensation and evaporation of helium from Vycor, a prototypic disordered porous material. For evaporation, our results provide the first direct evidence for a crossover from a percolation collective mechanism at low temperature to a local cavita...

The discoveries of CO₂-impermeable membranes in gastric glands; the CO₂-permeability membrane protein aquaporin 1 (AQP1), first “gas channel”; and “CO₂-blocking” proteins incorporated into artificial show that Overton's rule—namely, permeability solute X depends uniquely on lipid solubility X—is not universal. Various AQPs conduct CO₂ differing proportions, part through their hydrophilic monome...

The effects of anodizing condition and post treatment on the growth of nickel nanowires, were investigated. A two-step anodizing process was applied in phosphoric and oxalic acid solution. Nickel electrochemical plating was applied to fill Anodic Aluminum Oxide (AAO) pores. For pore filling enhancement, AAO surfaces were treated by silver predeposition. After electroplating, aluminum and oxide ...

This study examines the effects of change in the concentrations of monovalent and divalent ions in the polymer-contained surfactant solution on the macroscopic behavior of viscous-modified surfactant waterflooding in heavy oil reservoirs. Salts that are used in this set of floods were sodium chloride, magnesium chloride, and calcium chloride. The results indicate that four different ranges ...

Bamboo-structured carbon nanotubes are grown on Co-Mo/MCM-41 catalyst in the temperature range of 873-973 K by thermal chemical vapor deposition of acetylene. This study shows that the purified carbon nanotubes have open tips and the metals of the catalyst are not encapsulated. Thus, the bamboo-structure seems to grow from the base. Pore size distribution of the product is quite narrow and ...

21 See article by Ban et al. [3] (pages 556 –567) in this [3] address two hypotheses. The first is that Ca overload 21 issue. causes futile energy-dissipating mitochondrial Ca cy21 cling. This cycling involves mitochondrial Ca uptake 21 21 In the calcium paradox, Ca -free incubation produces through the mitochondrial Ca uniporter driven by the 1 1 Na loading of cardiac myocytes largely mediated...

Faced with the bewildering characteristics of the ionic currents that cause the action potential in squid axon, Hodgkin and Huxley in 1952 developed an elegant model (1) that remains one of the most insightful descriptions of the functional properties of voltage-gated ion channels. One ingredient in this conceptual wizardry was the strict separation between gating, the process responsible for a...

Vemana S, Pandey S, Larsson HP. Intracellular Mg is a voltage-dependent pore blocker of HCN channels. Am J Physiol Cell Physiol 295: C557–C565, 2008. First published June 25, 2008; doi:10.1152/ajpcell.00154.2008.—Hyperpolarization-activated cyclic nucleotide-gated (HCN) channels are activated by membrane hyperpolarization that creates time-dependent, inward rectifying currents, gated by the mov...

The pulsed field gradient technique of NMR (PFG NMR) is applied to explore molecular diffusion in different specimens of zeolite NaCaA, notably in samples containing hierarchical pore systems, as well in a silica material with an ordered, bimodal mesopore structure. In the hierarchical zeolithes the diffusivities in the two pore spaces are measured separately from each other by choosing ethane ...