The Behavior of the Zinc Electrode in Alkaline Solutions: IV . The Effect of Ionic Strength in the Tafel Region

1980 ◽  
Vol 127 (7) ◽  
pp. 1452-1456 ◽  
Author(s):  
T. P. Dirkse
Keyword(s):  
Ionic Strength ◽  
Alkaline Solutions ◽  
Zinc Electrode

scholarly journals The Effect of pH, Ionic Strength and the Presence of PbII on the Formation of Calcium Carbonate from Homogenous Alkaline Solutions at Room Temperature

Minerals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 783
Author(s):  
Fulvio Di Lorenzo ◽  
Kay Steiner ◽  
Sergey V. Churakov
Keyword(s):  
Ionic Strength ◽  
Deep Understanding ◽  
Inhibitory Effect ◽  
Alkaline Solutions ◽  
Nucleation Kinetics ◽  
Experimental Conditions ◽  
Calcium Carbonates ◽  
Natural Systems ◽  
Geological Processes ◽  
System Variables

Precipitation of calcium carbonates in aqueous systems is an important factor controlling various industrial, biological, and geological processes. In the first part of this study, the well-known titration approach introduced by Gebauer and coworkers in 2008 s used to obtain reliable experimental dataset for the deep understanding of CaCO3 nucleation kinetics in supersaturated solutions over a broad range of pH and ionic strength conditions. In the second part, the effect of impurities, i.e., 1 mol% of Pb2+, was assessed in the same range of experimental conditions. Divalent lead has been shown to have an inhibitory effect in all ranges of the conditions tested except for pH 8 and low ionic strength (≤0.15 mol/L). Future investigations might take advantage of the methodology and the data provided in this work to investigate the effect of other system variables. The investigation of all the major variables and the assessment of eventual synergic effects could improve our ability to predict the formation of CaCO3 in complex natural systems.

scholarly journals The mitochondrial localization of coproporphyrinogen III oxidase

1978 ◽  
Vol 176 (1) ◽  
pp. 97-102 ◽  
Author(s):  
B Grandchamp ◽  
N Phung ◽  
Y Nordmann
Keyword(s):  
Ionic Strength ◽  
Rat Liver ◽  
Membrane Binding ◽  
High Ionic Strength ◽  
Alkaline Solutions ◽  
Intermembrane Space ◽  
Mitochondrial Localization ◽  
Inner Membrane ◽  
Membrane Matrix ◽  
Coproporphyrinogen Iii Oxidase

The location of coproporphyrinogen III oxidase in mitochondria was studied in rat liver by using the digitonin method or hypo-osmotic media for fractionation. The enzyme was found in the intermembrane space with a fraction loosely bound to the inner membrane. This fraction was released by washing the inner-membrane-matrix complex with alkaline solutions or solutions of high ionic strength. The enzyme in both fractions had the same Km (0.16 micrometer) for coproporphyrinogen III. When incubation was performed in a medium that avoided destruction of enzyme membrane binding, a dramatic increase in activity was observed after sonication of whole mitochondria or of the inner-membrane-matrix complex.

A contribution to the electrochemiluminiscence determination of cobalt with luminol

1984 ◽  
Vol 49 (7) ◽  
pp. 1635-1641 ◽  
Author(s):  
Jiří Herejk ◽  
Záviš Holzbecher
Keyword(s):  
Ionic Strength ◽  
Alkaline Earth ◽  
Supply Voltage ◽  
Alkaline Solutions ◽  
Appreciable Effect ◽  
Concentration Region ◽  
Experimental Conditions ◽  
Limit Of Determination ◽  
Alkaline Earth Cations

The effect was studied of experimental conditions (pH, ionic strength, supply voltage, and type of electrodes) and of the presence of some cations and anions on the luminiscence of aqueous solutions of luminol generated by alternating current. Of the ions studied, Co2+ and Br- affected the electrochemiluminiscence (ECL) of luminol to the highest extent. Co2+ ions increase the ECL of luminol in alkaline solutions in concentrations cCo2+ = 10-3-6.10-6 mol l-1, the limit of determination of cobalt is 0.13 μg ml-1. In the presence of bromide in concentrations higher than 0.2 mol l-1, however, Co2+ lowers the ECL intensity over the concentration region of cCo2+ = 10-2-2.10-4 mol l-1. Alkali metal and alkaline earth cations as well as small amount of Pb2+, Zn2+, Cu2+, Cr3+, and Fe3+ have no appreciable effect on the ECL of luminol.

Effect of arsenate anion on the dissolution and passivation of zinc electrode in slightly alkaline solutions

1986 ◽  
Vol 31 (5) ◽  
pp. 527-533 ◽  
Author(s):  
I. Sánchez de Pinto ◽  
C.P. De Pauli ◽  
H. Herrera ◽  
H. Mishima ◽  
B.A. López
Keyword(s):  
Alkaline Solutions ◽  
Zinc Electrode
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