Integral and differential approaches to determining the volumetric compression of rocks caused by changes in stress state are considered. Changes volume pore space analyzed with an increase its all-round compression. Estimation compressibility coefficients reservoirs due development fields is urgent problem, since spread values factors reduces adequacy estimates physical properties subsidence e...

Serum albumin is the most abundant protein in the circulatory system. The ability of albumins to undergo a reversible conformational transition, observed with changes in pH, is conserved in distantly related species, suggesting for it a major physiological role possibly related to the transport of small molecules including drugs. We have followed changes of bovine serum albumin (BSA) in volume ...

Expressions for the viscosity correction function, and hence bulk complex impedance, density, compressibility, and propagation constant, are obtained for a rigid frame porous medium whose pores are prismatic with fixed cross-sectional shape, but of variable pore size distribution. The lowand high-frequency behavior of the viscosity correction function is derived for the particular case of a log...

Magma chamber volume is critical for volcano hazards assessment and forecasting. Standard geodetic methods constrain change, not the total volume. Here, we show that deformation response of magma to trapdoor faulting events at Sierra Negra volcano, Galapagos, depends on product absolute compressibility. Bubble-free provides lower limit compressibility, thus an upper bound 13.6–20.6 km3, dependi...

The ultrasonic velocity (U), density (ρ) and viscosity (η) measurements have been carried out for L-Methionine in aqueous sodium chloride, potassium chloride and lithium chloride as a function of composition at 303K. Experimental data have been used to estimate the adiabatic compressibility (β), change (∆β) and relative change in adiabatic compressibility (∆β/β°), acoustic impedance (z), limiti...

The density (ρ) and ultrasonic velocity (U) for ternary mixture of dimethyl acetamide, isobutyl methyl ketone and diethyl ether at different frequencies (2MHZ, 4MHz, 6MHZ, 8MHZ) have been measured at 308K. These data have been used to compute adiabatic compressibility (Ks), intermolecular free length (Lf), acoustic Impedance (Z), molar volume (Vm), molar sound velocity(R), molar compressibility...

Structural and volume compressibility data for two a cristobalite samples were determined by single-crystal X-ray diffraction methods at pressures up to -1.6 GPa. As with the other silica polymorphs that have been studied at high pressure, the change of the SiO-Si angle is correlated with the volume compressibility. The Si-O bond lengths and the O-Si-O angles remain essentially unchanged. The b...

The crystal structure of a copper squarate metal-organic framework is fully determined using first principles methods based in density functional theory. compressibility this material studied by optimizing the under different isotropic pressures and uniaxial stresses directed along direction minimum compressibility, [1 0 0]. Under compression, channels become wider 0], leading to negative linea...