The chronobiological effect on the pharmacokinetics of liposomal encapsulated ampicillin (LEA) was compared at noon (1200) and midnight (2400) after intravenous injection of 50 mg/kg of LEA in rats. The effects of fasting on the circadian rhythms of LEA were also investigated. Serial blood samples were collected for 2 h. Bile and urine were collected during the entire study. Plasma data was ana...

We investigate fluid transport in random velocity fields with unsteady drift. First, we propose to quantify fluid transport between flow regimes of different characteristic motion, by escape probability and mean residence time. We then develop numerical algorithms to solve for escape probability and mean residence time, which are described by backward Fokker-Planck type partial differential equ...

[ABSTRACT What does it mean to empower people through the housing in which they live, and how is this empowerment to be achieved? These are the questions which are examined in this paper. Typologies of empowerment processes are devised in an attempt to make sense of the conceptual and empirical variety involved. The distinction between ‘top-down’ and ‘bottom-up’ empowerment orientations is argu...

0009-2614/$ see front matter 2010 Elsevier B.V. A doi:10.1016/j.cplett.2010.08.019 * Fax: +972 2 651 3742. E-mail address: [email protected] 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 ...

'ote To· Hold Unloft 80ard Election· Agai~ . . '. ' , ': TJte SUI Union Board voted Tuesd:ly night to recall the March All· C!lJIlpUS Union Board election because the name of one of the candi· da~es was omitted when the ballots were printed.· • • ~h:n Newsome, A2, Des Moines, was not on thE' h!,lllJlt jn the 21 ,election. the new election wiJl be on April l"and 18. Only students ill the Col. le...

Characteristic times for transport processes in biological systems may be evaluated as mean transit times (MTTs) (for transit states) or mean residence times (MRT) (for steady states). It is shown in a general framework of a (linear) reaction–diffusion–convection equation that these two times are related. Analytical formulas are also derived to calculate moments of exit time distribution using ...

Quantitative knowledge of stabilizationand decomposition processes is necessary to understand, assess and predict effects of land use changes on storage and stability of soil organic carbon (soil C) in the tropics. Although it is well documented that different soil types have different soil C stocks, it is presently unknown how different soil types affect the stability of recently formed soil C...

BACKGROUND AND AIMS Leaf longevity is controlled by the light gradient in the canopy and also by the nitrogen (N) sink strength in the plant. Stand density may influence leaf dynamics through its effects on light gradient and on plant growth and reproduction. This study tests the hypothesis that the control by the light gradient is manifested more in the vegetative period, whereas the opposite ...