Results 211 to 220 of about 906,307 (266)
Some of the next articles are maybe not open access.
Review of Scientific Instruments, 1972
A constant volume valve is described for pressures to 1400 bar with a volume change between the open and closed positions of less than 0.15 mm3. The leak rate through the seat is less than 5×10−5 mole/sec. The valve is of a very simple design. The type described here is pneumatically operated.
openaire +1 more source
A constant volume valve is described for pressures to 1400 bar with a volume change between the open and closed positions of less than 0.15 mm3. The leak rate through the seat is less than 5×10−5 mole/sec. The valve is of a very simple design. The type described here is pneumatically operated.
openaire +1 more source
Constant Volume Ring Shear Apparatus
Geotechnical Testing Journal, 1996Abstract The paper describes a constant volume ring shear apparatus that allows the measurement of the undrained peak and residual shear strengths of cohesive soils. The undrained peak and residual strengths are applicable to seismic stability evaluations of slopes comprised of or founded on cohesive soil.
TD Stark, IA Contreras
openaire +1 more source
The Kauzmann Paradox at Constant Volume
The Journal of Physical Chemistry B, 2006The entropy of o-terphenyl in the liquid and crystalline state heated at constant volume in the range 250-310 K is calculated from calorimetric data at a pressure of 0.1 MPa and equation of state data. The specific heat is found to fit the same functional form as that at 0.1 MPa and leads to a vanishing of the excess entropy at essentially the same ...
openaire +2 more sources
Response of rainbow trout to constant-pressure and constant-volume hemorrhage
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 1989Plasma oncotic pressure (OC), protein concentration (P), osmolality (Osm), and hematocrit (Hct) were measured in conscious rainbow trout subjected to 120 min of constant-pressure (CPH) or constant-volume (CVH) hemorrhage. Blood volume, tissue red cell, and plasma space were determined in control and CPH trout with 51Cr-labeled red cells and 125I ...
D W, Duff, K R, Olson
openaire +2 more sources
Constant Volume and Constant Pressure Respirometry
2008This chapter describes constant pressure (Gilson) and constant volume (Warburg) respirometry—long-established techniques that are still capable of accurate results. These are useful for measuring the metabolic rates of small organisms, cell cultures, and biochemical preparations.
openaire +1 more source
Volume dependence of gruneisen constant
Solid State Communications, 1974Abstract An expression is derived for a new isothermal parameter λ = v γ ( ∂γ ∂v) T which gives the volume dependence of Gruneisen constant of cubic crystals and its value is calculated in the case of NaCl, KCl, Cu, Ag, Al and Au. It is shown that the λ parameter modifies the thermal contribution to the isothermal compressibility of ...
openaire +1 more source
Temperature dependent resistivity in Rb3C60: constant volume versus constant pressure
Physica C: Superconductivity, 1994Abstract Under conditions of constant sample volume the normal state resistivity of ϱ of Rb3C60 has a temperature dependence ϱ ≈ T, in sharp contrast to ϱ ≈ T2 observed under condtionns of constant sample pressure. Implications for the normal-state scattering mechanism are discussed.
W.A. Vareka, M.S. Fuhrer, A. Zettl
openaire +1 more source
Definition of variable-volume and constant-volume reaction rates
Journal of Chemical Education, 1965Examines disagreements regarding the fundamental definition of the reaction-rate expressions.
Max S. Peters, Edward J. Skorpinski
openaire +1 more source
Van der Waals volume fragmental constants
Chemical Physics Letters, 1985Abstract Van der Waals (vdW) volumes ( V w,x ) of 117 molecular fragments ( X ) have been calculated by numerical integration of the van der Waals envelope using the hard-sphere approximation, standard geometries, and effective atomic van der Waals radii which were determined by comparison of their effects on the predicted sterically allowed ...
Ioan Motoc, Garland R. Marshall
openaire +1 more source
Viscous Flow of Liquids at Constant Volume and Constant Pressure
The Journal of Chemical Physics, 1958The energy of activation for viscous flow at constant volume, Ev, is dependent on the volume of a liquid. For normal liquids at elevated temperatures, Ev is only a small fraction of the value of the activation energy at constant pressure, Ep. However, for associated liquids, on account of the presence of hydrogen bonds, Ev is almost equivalent to Ep ...
openaire +1 more source