Results 331 to 340 of about 19,252,089 (389)
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New insights into eutrophication management: Importance of temperature and water residence time.
Journal of Environmental Science, 2022Feng Zhao +10 more
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Chemical & Engineering News Archive, 2015
In drug discovery, researchers think a lot about how tightly a small molecule binds to its target. For a long time, drug developers have considered tightly binding compounds better, more promising drug candidates than molecules that interact weakly with their targets.
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In drug discovery, researchers think a lot about how tightly a small molecule binds to its target. For a long time, drug developers have considered tightly binding compounds better, more promising drug candidates than molecules that interact weakly with their targets.
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IEEE Transactions on Automatic Control, 1989
The problem of residence time control is extended to systems with outputs. Necessary and sufficient conditions for output residence time controllability in linear systems with small amounts of additive noise are derived. Design techniques for state-feedback controllers are developed and applied to a robotics control problem. The approach is based on an
S.M. Meerkov, T. Runolfsson
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The problem of residence time control is extended to systems with outputs. Necessary and sufficient conditions for output residence time controllability in linear systems with small amounts of additive noise are derived. Design techniques for state-feedback controllers are developed and applied to a robotics control problem. The approach is based on an
S.M. Meerkov, T. Runolfsson
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Measurement of residence times and residence-time distributions
1986It is not the intention of this chapter to treat exhaustively the theory of residence-time measurements; there are many excellent textbooks on the subject1,2. A brief review of ideal and non-ideal models, together with an indication of how the more important parameters of the models may be calculated, is sufficient for our purposes.
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2015
For a batch reaction, the conditions within a reactor (the concentrations of materials and products) change with time. In contrast, for a flow reaction, the conditions within a reactor remain constant with time, but the conditions differ at different locations within the reactor.
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For a batch reaction, the conditions within a reactor (the concentrations of materials and products) change with time. In contrast, for a flow reaction, the conditions within a reactor remain constant with time, but the conditions differ at different locations within the reactor.
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Understanding Residence Time, Residence Time Distribution, and Impact of Surge Vessels
2020Axial dispersion and residence time distribution (RTD) have significant process implications in the design of continuous processes. Low dispersion is better for minimizing time for complete reaction and minimizing deviation boundaries. High dispersion is better for dampening out process fluctuations or disturbances.
Martin D. Johnson +8 more
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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
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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
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Random residence time distribution
Chemical Engineering Science, 1986Abstract A discrete stochastic mixing model for chemical reactors is presented. The model is particularly useful to study the statistics of RTD and of the output concentration in a chemical reactor. Some computations of confidence intervals of concentration using information about the stochastic nature of flow are presented.
Octavian Iordache, Sergiu Corbu
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Biopharmaceutics & Drug Disposition, 1988
AbstractMean residence times (MRTs) have been classified into two main groups, namely system moment MRT [MRT(S,MO] and system matrix MRT [MRT(S,MA]. There are also MRTs of individual compartments [MRT(i)] such as central or plasma compartment, [MRT(P)], and tissue compartments and the MRT of an absorption site, [MRT(A)].
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AbstractMean residence times (MRTs) have been classified into two main groups, namely system moment MRT [MRT(S,MO] and system matrix MRT [MRT(S,MA]. There are also MRTs of individual compartments [MRT(i)] such as central or plasma compartment, [MRT(P)], and tissue compartments and the MRT of an absorption site, [MRT(A)].
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Chemical Physics Letters, 2010
Abstract The residence time of a diffusing particle in a prescribed spatial region recently finds an increasing number of applications in physics and chemistry. A partial differential equation for the residence time moments is derived, as a generalization of the ordinary differential equation for the first passage time moments.
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Abstract The residence time of a diffusing particle in a prescribed spatial region recently finds an increasing number of applications in physics and chemistry. A partial differential equation for the residence time moments is derived, as a generalization of the ordinary differential equation for the first passage time moments.
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