Results 201 to 210 of about 18,073,426 (243)

Mean residence time in peripheral tissue

Journal of Pharmacokinetics and Pharmacodynamics, 1987
The published methods for determining the mean residence time for drugs in peripheral tissue are reviewed in terms of assumptions involved, advantages and disadvantages. A method for determining mean transit time in peripheral tissue is proposed; this may be a more useful indicator of the tissue retention properties for drug compounds.
Joseph C Fleishaker, P J McNamara
exaly   +3 more sources

Mean Residence Time and Residence Time Distribution When Sawdust Is Dried in Continuous Dryers

Drying Technology, 2008
Information on the mean residence time and the residence time distribution is of importance when optimizing a continuous dryer. In this study, an industrial method for determining the mean residence time is developed. The produced method is benchmarked on a laboratory scale against the stop-and-empty method.
Roger Renström
exaly   +2 more sources

Danckwerts’ law for mean residence time revisited

Chemical Engineering Science, 2006
This paper shows that Danckwerts’ law for mean residence time in a vessel with continuous and steady through∞ow holds for a stochastic model based on a Markov chain for the particle spatial position, under a set of three very general conditions on the transfer probabilities.
Alex C. Hoffmann
exaly   +2 more sources

Comments on mean residence time determination

Journal of Pharmacokinetics and Biopharmaceutics, 1985
In a recent paper, D. O. Chanter challenged the applicability of the use of statistical moments in estimating mean residence time and proposed an alternative approach. Errors in that paper are pointed out which involve the improper equating of whole-body amount of drug with plasma amount of drug in a kinetic system.
E M, Landaw, D, Katz
openaire   +2 more sources

The mean oceanic residence time

Marine Chemistry, 1982
Abstract In this note the significance of heat of hydration and electronegativity in the study of oceanic residence times of elements is discussed.
Chen-Ping Chang, Lian-Sen Liu, Chen-Tung Chen   +2 more
openaire   +1 more source

Mean residence time in multicompartmental models with time delays

Journal of Biomedical Engineering, 1993
Calculation of the mean residence time (MRT) of a drug in a stationary compartmental model is classically carried out from several expressions. Nevertheless, one or more time delays between compartments modify the mean residence times. It is the aim of this paper to propose a general method for MRT calculations, in any n-compartmental models which may ...
Y, Plusquellec, G, Houin
openaire   +2 more sources

Stratospheric mean residence time and mean age on the tropopause: Connections and implications for observational constraints [PDF]

Journal of Geophysical Research D: Atmospheres, 2012
Stratospheric mean residence time  and mean age on the tropopause ΓΩ are shown to measure physically distinct aspects of stratospheric transport. Both ΓΩ and  are mean transit times through the stratosphere of air that enters through tropopause region Ω
Francois Primeau, Clara Orbe, Mark Holzer   +2 more
exaly   +2 more sources

On mean residence times in flow systems

Chemical Engineering Science, 1983
Abstract A widely accepted result of residence time theory namely mean residence time is equal to the system volume divided by the flow rate was first offered by Danckwerts[l] and later extended by Buffham[21 and Gibilaro[3] to more general cases.
R.C. Awasthi, K. Vasudeva
openaire   +1 more source

Mean residence time of plutonium in the troposphere

Environmental Science & Technology, 1982
Plutonium is injected into the stratosphere by large atmospheric thermonuclear explosions. When aerosols bearing plutonium reenter the troposphere, they are removed by such processes as rainfall and sedimentation. In this work, the mean tropospheric residence time of stratospherically injected plutonium is calculated.
Robert W. Holloway, David W. Hayes
openaire   +1 more source

Mean residence time.

Methods and findings in experimental and clinical pharmacology, 1986
The definition of mean residence time in the strict sense of mathematical statistics is deduced. It is demonstrated that the area-normalized concentration time curve is an estimate of the probability density function for residence times of drug molecules in the pharmacokinetic system, provided that the area under the concentration-time profile is ...
D, Brockmeier, H M, von Hattingberg
openaire   +1 more source