Transport dynamics

F. Otalora, J. M. Garcia-Ruiz. Crystal growth studies in microgravity with the APCF. I. Computer simulation of transport dynamics. J Cryst Growth 752 141, 1997. 

Fig. 8 Hole transport dynamics for hairpins possessing GAZ, GAGG, and GAGGG hole transport sequences...

Fig. 9 Hole transport dynamics and structures for hairpins possessing GTGG and crossstrand GACC hole transport sequences, a triplex hole transport system, and a two-step hole transport system...

Batalla RJ, Vericat D (2009) Hydrological and sediment transport dynamics of flushing flows implications for management in large mediterranean rivers. River Res Appl 25 297-314... 

Separation Dynamics. The mass transport dynamics of the system were examined with respect to extraction, back extraction, and time interval between extraction and back extraction. Concentration gradients limited by diffusion rate must be considered that is, equilibrium with homogenous concentrations of analyte does not describe this system. 

In summary, the distance dependence of electron transport dynamics varies as r p, where r is the bridge length (or the number of bridge units in the case of a charge hopping process) and p is less than 2. Consequently, electron transport rates display a very weak dependence on bridge length. 

There are many unanswered questions regarding chemical interactions and fate processes. What is the composition and impact of chemical interactions given the complex mixture of chemicals emitted and found in urban matrices (e.g. enhanced rates of chemical reaction and a wider range of transformation products) What are the roles of urban form and management practices in mediating transport dynamics (e.g. the implications of stormwater management systems on total chemical fate) Furthermore, what role do different types of urban development patterns and heat island effects play with respect to contaminant fate Does the simplified vegetative community that is dominated by exotic species influence the rate at which chemicals are processed or accumulated ... 

Plindt, M., Salomonsen, J., Carrer, M., Bocci, M., and Kamp-Nielsen, L. (1997). Loss, growth, and transport dynamics of Chaetomorpha aerea and Ulva rigida in the Lagoon of Venic during and early summer campaign. Ecol. Modell. 102, 133-141. 

Eganhouse R. P. and Kaplan I. R. (1981) Extractable organic matter in urban stormwater runoff 1. Transport dynamics and mass emission rates. Environ. Sci. Techno 15(3), 300-315. 

Frederick D. Lewis, Xiaoyang Liu, Jianqiu Liu, Scott E. Miller, Ryan T. Hayes, and Michael R. Wasleleroski, Direct measurement of hole transport dynamics in DNA, Nature, 406, 51-53 (2000). 

Zhou Z, Chu S (2009) A time-dependent momentum-space density functional theoretical approach for electron transport dynamics in molecular devices. Europhys Lett 88 17008... 

Fig. 11-6. Conceptualization of sorption and transport dynamics used in the multiprocess nonequilibrium model developed by Brusseau et al., (1989c). Figure was taken from Brusseau et al., 1989c.

Due to the sensitivity of electronic excitation transport to the separation and orientation of chromophores, techniques which monitor the rate of excitation transport among chromophores on polymer chains are direct probes of the ensemble average conformation (S). It is straightforward to understand qualitatively the relationship between excitation transport dynamics and the size of an isolated polymer coil which is randomly tagged in low concentration with chromophores. An ensemble of tagged coils in a polymer blend will have some ensemble averaged root-mean-squared radius of gyration,... 

General Method. In systems where the chromophore distribution is other than random in an infinite volume, two Important points must be taken into account in the calculation of G (t), regardless of which formalism is used to describe the transport dynamics. First, in performing the spatial average over all configurations of molecules surrounding the initially excited molecule, the appropriate radial distribution function must be employed. This is true for nonrandom distributions in infinite or finite systems. 

Husar, R.B., Patterson, D.E. and Wilson, W.E. (1985a) Monte Carlo simulation of regional air pollution transport dynamics. Submitted to Journal of Climate and Applied Meteorology, June 1985. 

Electron tunneling dynamics from electron bubbles in helium clusters strongly depends on the transport dynamics of the electron bubble within the cluster. In normal fluid ( He) and ( He)jy clusters the electron bubble motion is damped, while in (" He)jy superfluid clusters this motion is nondissipative [99]. Accordingly, bubble transport dynamics in ( He) clusters dominates the time scale for electron tunneling from the bubble, providing a benchmark for superfluidity in finite boson systems [245, 251]. In this chapter we address (a) the dynamics of electron tunneling from bubbles in ( He) and ( He) clusters [99, 209, 242-245, 251] and (b) the role of intracluster bubble transport on the lifetime of the bubble states. Our analysis provides semiquantitative information on electron bubbles in (" He) clusters as microscopic nanoprobes for superfluidity in finite quantum systems, in accord with the ideas underlying the work of Toennies and co-workers [99, 242-245]. 

SECM has also been used to measure transport dynamics in membranes (10). In this application the current at the tip is recorded as a function of time following a chemical or physical perturbation that alters the rate of transport across the membrane (e.g., a change in the electric field across the membrane). No other analytical technique or microscopy provides a comparable level of direct information about the pathways and dynamics of molecular transport in membranes. 

SECM can also be used to measure electroosmotic transport dynamics (10). For instance, Figure 21 shows the transient response of the SECM-tip current during E1Q transport following changes in the applied iontophoretic current. As in the steady-state measurements, the SECM tip is positioned directly above a pore to measure the flux of HQ from the donor compartment... 

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