Diffusion potential of a p(Se)-n(CdSe) heterojunction

1972 ◽  
Vol 15 (4) ◽  
pp. 506-509
Author(s):  
V. A. Dorin
Keyword(s):  
Diffusion Potential

Ginzburg-Landau Modeling for Martensitic Transformation Coupled with Composition Redistribution

2018 ◽  
Vol 15 ◽  
pp. 154-180
Author(s):  
Guang Long Xu ◽  
Yu Wen Cui
Keyword(s):  
Martensitic Transformation ◽  
Diffusion Potential ◽  
Complex Materials ◽  
Real Time Control ◽  
Ginzburg Landau ◽  
Complex Phase ◽  
Calphad Technique ◽  
Materials Behaviors ◽  
Time Control ◽  
The Common

The Ginzburg-Landau (G-L) model possesses the thermodynamic foundation of energy minimization and is available for many dynamic formalisms, thus holds great potential for investigating the complex materials behaviors. The common ingredient in energy spawns the real-time control of diffusion potential and chemical mobility by integrating G-L model with CALPHAD technique. The coupling between martensitic transformation and dislocation evolution is achieved by mean of continuous mechanism. The updated G-L model is then validated against the martensitic transformation coupled with composition redistribution in Fe-C binary system. The modeling allows some deeper insights into the mechanisms of coupling effects behind the observed phenomena. It has been proven that the partitioning of carbon in steels is an ordinary diffusion governed by instantaneous diffusion potential and chemical mobility. The rough twin boundaries and retained austenite within the martensite should be attributed to the effect of dislocations. Although the developed model in this chapter has deficiencies, it sheds some lights on the integration of multi-physics models for a complex phase transformation.

Interfacial Impurity Flux Model Based on Diffusion Potential

1991 ◽  
Vol 138 (1) ◽  
pp. 230-233 ◽  
Author(s):  
Kunihiro Suzuki ◽  
Tetsu Fukano
Keyword(s):  
Diffusion Potential ◽  
Model Based ◽  
Flux Model

scholarly journals DIFFERING RATES OF DEATH AT INNER AND OUTER SURFACES OF THE PROTOPLASM

1945 ◽  
Vol 28 (4) ◽  
pp. 343-347 ◽  
Author(s):  
W. J. V. Osterhout
Keyword(s):  
Surface Layer ◽  
Outer Surface ◽  
Diffusion Potential ◽  
Experimental Conditions ◽  
Toxic Agent ◽  
Inner Surface

The inner and outer protoplasmic surfaces in Nitella may differ greatly in behavior. When 0.01 M HgCl2 is applied externally death arrives first at the inner surface. But when 0.01 M HgCl2 + 0.01 M KCl is applied death takes place sooner at the outer surface. Since 0.01 M KCl by itself is not toxic its effect may be to condition the surface layer chemically or by means of the diffusion potential it sets up (this may amount to 100 mv.). These surfaces consist of non-aqueous films forming the boundaries of a layer of aqueous protoplasm not over 10 microns in thickness. These and earlier experiments with formaldehyde and with chloroform show clearly that it is possible to control the behavior of the protoplasmic surfaces so that when a toxic agent is applied it may produce death more rapidly at the inner or at the outer surface according to experimental conditions.

scholarly journals The Electrical Characteristics of Active Sodium Transport in the Toad Bladder

1963 ◽  
Vol 46 (3) ◽  
pp. 491-503 ◽  
Author(s):  
Howard S. Frazier ◽  
Alexander Leaf
Keyword(s):  
Sodium Transport ◽  
Short Circuit ◽  
Diffusion Potential ◽  
Toad Bladder ◽  
Chloride Diffusion ◽  
Active Sodium ◽  
High Potassium ◽  
Potential Step ◽  
Active Sodium Transport ◽  
Wide Range

The mechanism responsible for active sodium transport in the urinary bladder of the toad appears to be located at the serosal boundary of the epithelial cell layer of the bladder. Studies of the potential step observed at the serosal boundary in the open-circuited state were undertaken in an attempt to define the factors responsible for its production. Glass micropipettes were used to measure the serosal potential step in bladders exposed on the serosal side to solutions of high potassium or of high potassium and low chloride concentration. Observed potentials exceed the maximum values which would have been expected if the serosal potential step were a potassium or chloride diffusion potential. Measurements of net cation flux exclude the possibility of a diffusion potential at this border due to the passive movement of any anionic species. The observed independence of transbladder potential and short-circuit current from the pH of the serosal medium over a wide range of pH makes it unlikely that the observed serosal potential step is a hydrogen ion diffusion potential. We conclude that the active sodium transport mechanism in toad bladder is "electrogenic."

Diffusion Potential

2016 ◽  
Author(s):  
M. Kizilyalli ◽  
J. Corish ◽  
R. Metselaar
Keyword(s):  
Diffusion Potential
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