Guanine nucleotides have been reported to stimulate reticular Ca2+ release. By using the structure-linked latency of microsomal mannose-6-phosphate phosphatase as an index of microsomal permeability [Arion, Ballas, Lange & Wallin (1976) J. Biol. Chem. 251, 4901-4907], the effects of GTP on Ca2+ release and membrane permeability were compared in liver microsomes. In a stripped rough-microsome pr...

In this paper, conceptual models are presented to identify the effects of solid deformation on the changes in rock permeabilities for (a) fractured media, (b) intact media, and (c) fractured porous media subjected to external loads, all in steady state conditions. Finite element schemes are then developed with embedded correlations between induced strain and modified permeability to simulate th...

Net pay thickness is defined as that portion of a reservoir which contains economically producible hydrocarbons with today’s technology, prices, and costs. This thickness is a key parameter of the volumetric calculation of in-place hydrocarbons, well test interpretation, and reservoir characterization. A reservoir interval is considered as net pay when it contains hydrocarbons that can flow at ...

In this study, a time-dependent 2D axisymmetric model of a multilayer hollow fiber composite membrane for gas separation is proposed. In spite of the common multilayer membranes, which a dense layer coated on a porous support layer and subjected into the feed stream, here, the porous support is exposed to the feed gas. In this regard, the governing equations of species transport are developed f...

OBJECTIVES S1P acts via the S1PR family of G protein-coupled receptors to regulate a variety of physiological responses. Whereas S1P1R activates G(i)- and PI-3-kinase-dependent signals to inhibit vascular permeability, the related S1P2R inhibits the PI-3-kinase pathway by coupling to the Rho-dependent activation of the PTEN phosphatase. However, cellular consequences of S1P2R signaling in the v...

Wettability is a pore-scale property that impacts the relative movement and distribution of fluids in porous medium. There are reservoir provoke surface within pores to undergo wettability change. This change, turn, alters dynamics permeabilities at Darcy scale. Thus, modeling impact change essential understand interaction media. In this study, we include time-dependent into permeability–satura...

To investigate the anisotropy of coal swelling, this study proposes an effective stress model for saturated, adsorptive fractured porous media by considering gas adsorption induced surface change on solid-fluid interface. The can be used to capture anisotropic swelling combining mechanical properties and link with permeability. Direction dependent fracture compressibility is describe evolution ...