Results 241 to 250 of about 18,414,870 (283)

Use of gamma distributed residence times in pharmacokinetics

European Journal of Clinical Pharmacology, 1983
Using a nonclassical statistically based pharmacokinetic concept, a theory is presented which can be applied to the analysis of concentration-time data fitted by power functions of time C = At-ae-bt, which is shown to be equivalent to the assumption of gamma distributed residence times of drugs. The shape and scale parameters a and b, respectively, are
openaire   +2 more sources

Tracer curves and the residence time distribution

Chemical Engineering Science, 1970
Abstract For a pulse input the shape of the output tracer curve depends on the way tracer is distributed across the flowing fluid, and the way it is measured. This paper properly relates the different curves which may be obtained for flows with negligible cross diffusion, and shows which one of these represents directly the residence time ...
Octave Levenspiel, B.W. Lai, C.Y. Chatlynne   +2 more
openaire   +1 more source

Residence Time Distributions in Ozone Contactors

Ozone: Science & Engineering, 2008
The hydraulics in ozone systems, characterized by the residence time distribution, are investigated numerically as well as experimentally. The complex geometry of the ozone contactors requires the application of computational fluid dynamics (CFD), which in combination with experimental results gives insight in the hydraulic processes. Particle tracking
B.A. Wols, W.S.J. Uijttewaal, L.C. Rietveld, G.S. Stelling, J.C. van Dijk, J.A.M.H. Hofman   +5 more
openaire   +1 more source

Residence time distribution in a holding tube

Journal of Food Engineering, 1992
Abstract The residence time distribution (RTD) of two Newtonian (water and 12% sucrose solution) and two non-Newtonian liquids (0·2 and 0·4% guar gum solutions), at a minimum of five different flow rates each, was determined in a holding tube consisting of 10 sections with a total length of 33 m, at 25±0·5°C.
Martin F. Sancho, M.A. Rao
openaire   +1 more source

On the residence time distribution in idealized groundwatersheds

Journal of Hydrology, 1995
The relative cumulative frequency distribution of residence times F(T) is calculated for an entire groundwatershed under steady-state conditions and assuming Dupuit-Forchheimer flow. It appears that F(T) is always the same: F(T) = 1 -exp(−TT), provided that the aquifer recharge rate and T are constant over the groundwatershed.
openaire   +1 more source

INTERNAL AND EXTERNAL RESIDENCE-TIME DISTRIBUTIONS

Chemical Engineering Communications, 1983
(1983). INTERNAL AND EXTERNAL RESIDENCE-TIME DISTRIBUTIONS. Chemical Engineering Communications: Vol. 22, No. 1-2, pp. 105-107.
openaire   +1 more source

Engineering: Residence Time Distribution II

Cereal Foods World, 2008
openaire   +1 more source

Residence Time Distributions

Cereal Foods World, 2008
openaire   +1 more source

Real reactors and residence time distributions

2020
openaire   +1 more source

VARIATIONS IN RESIDENCE-TIME DISTRIBUTIONS

1971
ALAN D. RANDOLPH, MAURICE A. LARSON
openaire   +1 more source