Radiation Enhanced Anion Diffusion in Chromia

2021 ◽  
Author(s):  
Kayla H. Yano ◽  
Aaron A. Kohnert ◽  
Tiffany C. Kaspar ◽  
Sandra D. Taylor ◽  
Steven R. Spurgeon ◽  
...  
Keyword(s):  
Anion Diffusion

The crystal structure of α-PbSnF4 and its anion diffusion mechanism

2005 ◽  
Vol 17 (6) ◽  
pp. 845-861 ◽  
Author(s):  
M Castiglione ◽  
P A Madden ◽  
P Berastegui ◽  
S Hull
Keyword(s):  
Crystal Structure ◽  
Diffusion Mechanism ◽  
Anion Diffusion

scholarly journals A single cation or anion dendrimer-based liquid electrolyte

2016 ◽  
Vol 7 (5) ◽  
pp. 3390-3398 ◽  
Author(s):  
Sudeshna Sen ◽  
Rudresha B. Jayappa ◽  
Haijin Zhu ◽  
Maria Forsyth ◽  
Aninda J. Bhattacharyya
Keyword(s):  
Ion Transport ◽  
Transference Number ◽  
Liquid Electrolyte ◽  
Ion Conductor ◽  
Ionic Transference Number ◽  
Anion Diffusion

The proposed dendrimer based liquid electrolyte is a single-ion conductor where ion transport is altered by the nature of the chemical functionalities leading to large variations in anion diffusion and hence ionic transference number.

Oxygen-18 Tracer Measurements of Anion Diffusion in Uranium Dioxide Thin Films

JOM ◽  
2019 ◽  
Vol 71 (12) ◽  
pp. 4808-4816 ◽  
Author(s):  
Joseph R. Bernhardt ◽  
Xiaochun Han ◽  
Brent J. Heuser
Keyword(s):  
Thin Films ◽  
Uranium Dioxide ◽  
Anion Diffusion

Oxygen Anion Diffusion in Doped Ceria MxCe1-xO2-0.5x (M=Gd, Sm and Pr): A Molecular Dynamics Simulation Study

MRS Advances ◽  
2019 ◽  
Vol 4 (13) ◽  
pp. 783-792 ◽  
Author(s):  
Neetu Kumari ◽  
Uzma Anjum ◽  
M. Ali Haider ◽  
Suddhastawa Basu
Keyword(s):  
Molecular Dynamics ◽  
Dopant Concentration ◽  
Optimum Concentration ◽  
Dynamics Simulation ◽  
Doped Ceria ◽  
Oxygen Anion ◽  
Anion Diffusion ◽  
Order Of Magnitude ◽  
Pure Ceria ◽  
Dynamics Simulations

ABSTRACTMolecular dynamics simulations were utilized to determine the oxygen anion diffusivity in pure ceria (CeO2) and doped ceria MxCe1-xO2-0.5x(M=Gd, Sm and Pr) with varying level of dopant concentration from 5-30% (x = 0.05-0.3). Doping with Gd showed an improvement in oxygen anion diffusivity value by two order of magnitude (D = 4.67x10-8cm2/s at 1173 K) as compared to the undoped ceria (D = 1.33x10-10cm2/s at 1173 K). 10% of doping level was estimated as the optimum concentration of all the dopants at which all of the doped ceria materials showed maximum diffusivity of oxygen anion. Among the three dopants studied, Pr was observed to show maximum diffusivity of oxygen anion in the temperature range of 773-1173 K of simulations.

Anion Diffusion in Crystals of NaCl

1965 ◽  
Vol 36 (2) ◽  
pp. 624-631 ◽  
Author(s):  
L. W. Barr ◽  
J. A. Morrison ◽  
P. A. Schroeder
Keyword(s):  
Anion Diffusion

scholarly journals Characterization of an ATP-driven H+ pump in human placental brush-border membrane vesicles

1992 ◽  
Vol 287 (2) ◽  
pp. 423-430 ◽  
Author(s):  
B J Simon ◽  
P Kulanthaivel ◽  
G Burckhardt ◽  
S Ramamoorthy ◽  
F H Leibach ◽  
...  
Keyword(s):  
Brush Border ◽  
Brush Border Membrane ◽  
Membrane Vesicles ◽  
Brush Border Membrane Vesicles ◽  
Bafilomycin A1 ◽  
Ph Indicator ◽  
Native Form ◽  
Anion Diffusion ◽  
Partial Activity

The presence of an ATP-driven H+ pump as measured by H+ uptake upon addition of ATP was not demonstrable in human placental brush-border membrane vesicles when used in their native form, owing to their right-side-out orientation. However, the presence of the H+ pump in these membranes became evident when the membrane vesicles were transiently exposed to 1% cholate, with subsequent removal of the detergent to re-form the vesicles. Apparently, cholate pretreatment reoriented the H+ pump from an inward-facing configuration to outward-facing. Consequently, H+ uptake in response to externally added ATP was easily demonstrable in these cholate-pretreated vesicles by using the delta pH indicator Acridine Orange. In addition, bafilomycin A1-sensitive ATPase activity was measurable in cholate-pretreated vesicles, but not in native intact vesicles, indicating reorientation of the H+ pump. The reoriented H+ pump was electrogenic because H+ uptake was stimulated by an inside-negative anion-diffusion potential or when the vesicles were voltage-clamped. ATP supported H+ uptake with an apparent Km of 260 microM. ITP and GTP supported the pump activity partially, whereas CTP and UTP did not. Mg2+ and Mn2+ were the most preferred bivalent cations. Co2+ and Zn2+ showed partial activity, whereas Ca2+ and Ba2+ showed little or no activity. The pump was inhibited by nanomolar concentrations of bafilomycin A1 and micromolar concentrations of N-ethylmaleimide, p-chloromercuribenzenesulphonate, NN-dicyclohexylcarbodi-imide and 7-chloro-4-nitrobenzo-2-oxa-1,3-diazole, but was relatively insensitive to oligomycin, vanadate and NaN3. The inhibition by N-ethylmaleimide was protectable by ATP. It is concluded that human placental brush-border membranes possess an ATP-driven H+ pump and that, on the basis of its characteristics, it belongs to the class of vacuolar (V-type) H+ pumps.

A comparative anion diffusion study on different argillaceous, low permeability sedimentary rocks with various pore waters

2018 ◽  
Vol 92 ◽  
pp. 157-165 ◽  
Author(s):  
Cornelia Wigger ◽  
Laura Kennell-Morrison ◽  
Mark Jensen ◽  
Martin Glaus ◽  
Luc Van Loon
Keyword(s):  
Sedimentary Rocks ◽  
Low Permeability ◽  
Pore Waters ◽  
Diffusion Study ◽  
Anion Diffusion
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