Two dimensional diffusion of small molecules on protein surfaces: an EPR study of the restricted translational diffusion of protein-bound spin labels

1991 ◽  
Vol 20 (5) ◽  
pp. 293-303 ◽  
Author(s):  
Heinz -J�rgen Steinhoff ◽  
Olaf Dombrowsky ◽  
Christine Karim ◽  
Christoph Schneiderhahn
Keyword(s):  
Small Molecules ◽  
Translational Diffusion ◽  
Spin Labels ◽  
Two Dimensional ◽  
Protein Surfaces ◽  
Dimensional Diffusion

Asymptotic analysis of some two-dimensional diffusion problems

1995 ◽  
Vol 448 (1933) ◽  
pp. 213-236 ◽  
Keyword(s):  
Linear Problem ◽  
Vacancy Concentration ◽  
Surface Concentration ◽  
Two Dimensional ◽  
Surface Source ◽  
Dimensional Diffusion ◽  
Equilibrium Vacancy ◽  
Equilibrium Vacancy Concentration ◽  
Dimensional Surface ◽  
Diffusion Problems

In this paper we discuss two-dimensional surface source and implant problems for a substitutional-interstitial diffusion model. We present asymptotic solutions in the limit of the surface concentration of impurity (or peak concentration of the implant) being far greater than the equilibrium vacancy concentration. Using leading order composite solutions we plot contours of constant impurity concentration. Some of these contours differ markedly from those of the corresponding linear problem, having the ‘bird’s beak’ shape which is frequently observed in experiments. We also discuss a two-dimensional surface source problem for a va­cancy model.

Predicting the release profile of small molecules from within the ordered nanostructured lipidic bicontinuous cubic phase using translational diffusion coefficients determined by PFG-NMR

Nanoscale ◽  
2017 ◽  
Vol 9 (7) ◽  
pp. 2471-2478 ◽  
Author(s):  
Thomas G. Meikle ◽  
Shenggen Yao ◽  
Alexandru Zabara ◽  
Charlotte E. Conn ◽  
Calum J. Drummond ◽  
...  
Keyword(s):  
Small Molecules ◽  
Diffusion Coefficients ◽  
Translational Diffusion ◽  
Release Profile ◽  
Cubic Phase ◽  
Bicontinuous Cubic ◽  
Pfg Nmr
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