Diffusion-controlled reactionA+B→0 in one dimension: The role of particle mobilities and the diffusion-equation approach

1991 ◽  
Vol 44 (4) ◽  
pp. 2388-2393 ◽  
Author(s):  
I. M. Sokolov ◽  
H. Schnörer ◽  
A. Blumen
Keyword(s):  
Diffusion Equation ◽  
One Dimension ◽  
Equation Approach ◽  
Diffusion Controlled

The role of magmatic reaction, diffusion, and annealing in the evolution of coronitic microstructure in troctolitic gabbro from Risör, Norway: a discussion

1986 ◽  
Vol 50 (357) ◽  
pp. 469-473 ◽  
Author(s):  
J. R. Ashworth
Keyword(s):  
Solid State ◽  
Open System ◽  
Local Equilibrium ◽  
Reaction Diffusion ◽  
One Dimension ◽  
System Behaviour ◽  
Diffusion Controlled

AbstractThe data of Joesten (1986) are re-interpreted. The petrography of the coronas is not consistent with magrnatic origin. Both microstructural types described by Joesten (1986), here re-named ‘columnar’ and ‘tabular’, formed by solid-state replacement of plagioclase and of adjacent olivine or ilmenite. Tabular microstructures are not annealed, but result from overgrowth or epitaxy of amphibole and pyroxene on pre-existing grains. Since the diffusion-controlled models of Joesten (1986) can account for major aspects of the coronas, it seems possible that a slightly modified, less simplified theory might explain them fully. Open-system behaviour must be admitted, with some constraints provided by symplectites. It may also be necessary to develop the theory in more than one dimension, and to allow for departures from local equilibrium at layer boundaries.

scholarly journals The role of morality in social cognition

2019 ◽  
Author(s):  
Jennifer Lauren Ray ◽  
Peter Mende-Siedlecki ◽  
Ana P. Gantman ◽  
Jay Joseph Van Bavel
Keyword(s):  
Social Cognition ◽  
Social Perception ◽  
Impression Formation ◽  
Factor Models ◽  
The Other ◽  
One Dimension ◽  
Primary Role ◽  
The Past ◽  
Important Basis

Over the past few decades, two-factor models of social cognition have emerged as the dominant framework for understanding impression formation. Despite the differences in the labels, there is wide agreement that one dimension reflects sociability potential, and the other, competence. One way in which the various two-factor models do clearly differ, however, is in the way the dimensions incorporate or produce evaluations of morality. Aristotle saw morality as the most important basis on which to form positive evaluations, because competence and sociability could only be virtuous, sincere, and trustworthy if expressed through a moral character. This chapter highlights research demonstrating the unique and possibly primary role of morality in social cognition. We clarify the dynamic, interactive, and conjoint effects of morality on social perception, and argue morality, competence, and sociability are three influential and interactive dimensions of social perception.

scholarly journals Bacterial leaching kinetics for copper dissolution from a lowgrade Indian chalcopyrite ore

2013 ◽  
Vol 66 (2) ◽  
pp. 245-250 ◽  
Author(s):  
Abhilash ◽  
K.D. Mehta ◽  
B.D. Pandey
Keyword(s):  
Phase Identification ◽  
Low Grade ◽  
Bacterial Leaching ◽  
Copper Dissolution ◽  
Diffusion Controlled ◽  
Shrinking Core ◽  
Copper Mines ◽  
Chalcopyrite Ore ◽  
Best Fit

Bio-leaching of copper (0.3%) from a low grade Indian chalcopyrite ore of Malanjkhand copper mines, using a native mesophilic isolate predominantly Acidithiobacillus ferrooxidans (A.ferrooxidans), is reported. A bio-recovery of 72% Cu was recorded in the presence of this culture (not adapted), which increased to 75% with an ore adapted culture after 35 days at 35ºC and pH 2.0 with <50fim particles. The kinetic data showed best fit for the diffusion-controlled shrinking core model, exhibiting linear plots for [1- 2/3X-(1-X)2/3] vs time (X-fraction leached). Apparently, the role of the bacteria is to convert the ferrous ion to the ferric state, which oxidizes the chalcopyrite in order to dissolve copper, while maintaining a high redox potential. The activation energy value (E) was calculated to be 96 and 108 kJ/mol for the un-adapted culture and the ore adapted culture respectively in the temperature range 25-35ºC. This leaching mechanism was corroborated by XRD phase identification and SEM studies of the leach residue.

A diffusion equation approach to spin diffusion in biomolecules

1989 ◽  
Vol 84 (2) ◽  
pp. 255-267 ◽  
Author(s):  
V.V Krishnan ◽  
N Murali ◽  
Anil Kumar
Keyword(s):  
Diffusion Equation ◽  
Spin Diffusion ◽  
Equation Approach

Commensurability in one dimension atT≠0: The role of kinks

1979 ◽  
Vol 20 (11) ◽  
pp. 4748-4755 ◽  
Author(s):  
R. A. Guyer ◽  
M. D. Miller
Keyword(s):  
One Dimension
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