Acute reduction of portal vein blood flow (Qpv) increases hepatic arterial perfusion (Qha) [the hepatic arterial buffer response (HABR)]. Angiotensin II (AT-II) reduces Qpv, but its effect on HABR is not known. We explored interactions of AT-II and enalapril with hepatic blood flow regulation. Twenty healthy anesthetized pigs were randomized to receive AT-II (n = 8) from 5 to 61 ng/kg per min, ...

First-principles and classical molecular dynamics simulations have been performed to study the structural and thermodynamic properties of Pd under pressure. By comparing the Gibbs free energy, in the quasiharmonic approximation (QHA), of the face-centered cubic (fcc) phase with those of the hexagonal-close-packed (hcp) and body-centered-cubic (bcc) phases we found that the fcc phase is stable u...

We show here how first-principles quasiharmonic approximation QHA calculations in its simplest statically constrained form can be used to predict crystal structures at high temperatures. This approximation has been extensively used to investigate thermodynamic properties of Earth forming minerals and has offered excellent results for the major mantle phases at relevant conditions. We carefully ...

[1] The vibrational properties of Mg2SiO4 wadsleyite have been calculated over a wide pressure range using density functional perturbation theory (DFPT). Both the normal mode frequencies and their volume dependences are consistent with the available Raman and infrared data. We provide detailed information about vibrational properties that are still not experimentally available. The vibrational ...

We present inelastic neutron scattering measurements of Y3Al5O12. The measured neutron-weighted phonon density-of-states and optical frequencies are compared with the results from atomistic calculations within Quasi-Harmonic Approximation (QHA) over a wide temperature range, using both first principles density functional theory also an extended empirical interatomic-potential shell model scheme...