Kinetics of silver electrodeposition from thiocarbamide solutions at a regular surface coverage with sulfide ions

2008 ◽  
Vol 44 (10) ◽  
pp. 1087-1091 ◽  
Author(s):  
R. Yu. Bek ◽  
L. I. Shuraeva
Keyword(s):  
Surface Coverage ◽  
Regular Surface ◽  
Sulfide Ions ◽  
Silver Electrodeposition ◽  
Kinetics Of

Dynamics and Kinetics of Methanol‐Graphite Interactions at Low Surface Coverage

ChemPhysChem ◽  
2019 ◽  
Vol 20 (17) ◽  
pp. 2171-2178 ◽  
Author(s):  
Xiangrui Kong ◽  
Erik S. Thomson ◽  
Nikola Marković ◽  
Jan B. C. Pettersson
Keyword(s):  
Surface Coverage ◽  
Kinetics Of

scholarly journals How Antibody Surface Coverage on Nanoparticles Determines the Activity and Kinetics of Antigen Capturing for Biosensing

2014 ◽  
Vol 86 (16) ◽  
pp. 8158-8166 ◽  
Author(s):  
Bedabrata Saha ◽  
Toon H. Evers ◽  
Menno W. J. Prins
Keyword(s):  
Surface Coverage ◽  
Kinetics Of

scholarly journals Cover Feature: Dynamics and Kinetics of Methanol‐Graphite Interactions at Low Surface Coverage (ChemPhysChem 17/2019)

ChemPhysChem ◽  
2019 ◽  
Vol 20 (17) ◽  
pp. 2137-2137
Author(s):  
Xiangrui Kong ◽  
Erik S. Thomson ◽  
Nikola Marković ◽  
Jan B. C. Pettersson
Keyword(s):  
Surface Coverage ◽  
Kinetics Of

On the kinetics of the Langmuir-type heterogeneous reactions

2011 ◽  
Vol 16 (4) ◽  
pp. 467-476 ◽  
Author(s):  
Vladas Skakauskas ◽  
Pranas Katauskis
Keyword(s):  
Steady State ◽  
Surface Coverage ◽  
Surface Reactions ◽  
Heterogeneous Reactions ◽  
The Other ◽  
Two Dimensional ◽  
Finite Difference Technique ◽  
Planar Surfaces ◽  
Adsorption Desorption ◽  
Kinetics Of

In this paper we investigate three two-dimensional in space mathematical models of the kinetics of unimolecular heterogeneous reactions proceeding onto planar surfaces. All models include the diffusion of the reactant from a bounded vessel towards an adsorbent, adsorption of the molecules of the reactant, their desorption, conversion (reaction) of the adsorbate into a product, instantaneous product desorption, and the diffusion of the product from the adsorbent into the same vessel. One of these models is based on the Langmuir-type kinetics of the surface reactions, the other one is based on the local steady-state value of the surface coverage, and the last one, in addition to the first model, involves the diffusion of the adsorbate along the adsorbent. Diffusivity of all species is assumed to be constant. Models were solved numerically by using the finite difference technique. By changing input parameters the effects of the rate constants of the reactant adsorption, desorption, and reaction and the influence of the surface diffusion of the adsorbate and approximation of the surface coverage by its steady-state value on the kinetics of surface reactions were studied numerically.

The kinetics of silver electrodeposition on iodine-covered Pt(111)

1991 ◽  
Vol 318 (1-2) ◽  
pp. 271-282 ◽  
Author(s):  
Neil C. Gibson ◽  
Paul M. Saville ◽  
David A. Harrington
Keyword(s):  
Silver Electrodeposition ◽  
Kinetics Of

The Effect of Pollutants and Bacterial Microfouling on the Corrosion of Copper Base Alloys in Seawater

CORROSION ◽  
1985 ◽  
Vol 41 (1) ◽  
pp. 31-38 ◽  
Author(s):  
D. J. Schiffrin ◽  
S. R. De Sanchez
Keyword(s):  
Corrosion Rate ◽  
Bacterial Contamination ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Dimensionless Number ◽  
Copper Base ◽  
Term Change ◽  
Sulfide Ions ◽  
Kinetics Of

Abstract The effects of seawater contaminants such as ammonium and sulfide ions and trimethylamine on the corrosion behavior of copper base alloys have been studied. Sulfide contamination causes a long-term change in the surface properties of the passive film formed on these alloys in uncontaminated seawater. The kinetics of oxygen reduction and anodic dissolution were studied, and the results were analyzed on the basis of a simple, activated-diffusionally controlled model. It has been shown that the relationships derived for the rotating disk electrode geometry can be extended to any hydrodynamic configuration, provided the corresponding dimensionless number relationships are known. The correlating parameter (between the rotating disk experiments and hydrodynamic geometries) used in this work is the mass transfer coefficient. Bacterial contamination led to the loss of passivation, and the corrosion rate was determined by the rate of oxygen diffusion through the bacterial slime. Three genera of bacteria have been identified in the bacterial slimes present in condenser tubes using contaminated seawater as coolant. These were Pseudomonas, Micrococcus, and Corynebacterium. Of these, the Pseudomonas were entirely responsible for the observed corrosion rate increase. The combination of bacterial contamination and anaerobic conditions can create an extremely corrosive environment.

scholarly journals Heparin Stimulates Staphylococcus aureus Biofilm Formation

2005 ◽  
Vol 73 (8) ◽  
pp. 4596-4606 ◽  
Author(s):  
Robert M. Q. Shanks ◽  
Niles P. Donegan ◽  
Martha L. Graber ◽  
Sarah E. Buckingham ◽  
Michael E. Zegans ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Biofilm Formation ◽  
Surface Coverage ◽  
Anticoagulant Activity ◽  
Bloodstream Infections ◽  
Dependent Manner ◽  
Abiotic Surfaces ◽  
Primary Attachment ◽  
Kinetics Of ◽  
Stimulation Of

ABSTRACT Heparin, known for its anticoagulant activity, is commonly used in catheter locks. Staphylococcus aureus, a versatile human and animal pathogen, is commonly associated with catheter-related bloodstream infections and has evolved a number of mechanisms through which it adheres to biotic and abiotic surfaces. We demonstrate that heparin increased biofilm formation by several S. aureus strains. Surface coverage and the kinetics of biofilm formation were stimulated, but primary attachment to the surface was not affected. Heparin increased S. aureus cell-cell interactions in a protein synthesis-dependent manner. The addition of heparin rescued biofilm formation of hla, ica, and sarA mutants. Our data further suggest that heparin stimulation of biofilm formation occurs neither through an increase in sigB activity nor through an increase in polysaccharide intracellular adhesin levels. These finding suggests that heparin stimulates S. aureus biofilm formation via a novel pathway.

scholarly journals Adsorption affinity of Zn (II) ions for nanostructured zirconium phosphate/silica or titania composites

2021 ◽  
Author(s):  
W. Janusz ◽  
V. Sydorchuk ◽  
E. Skwarek ◽  
S. Khalameida ◽  
J. Skubiszewska-Zięba ◽  
...  
Keyword(s):  
Zirconium Phosphate ◽  
Surface Coverage ◽  
Complete Removal ◽  
Mechanical Processing ◽  
Zinc Ions ◽  
Titanium Oxides ◽  
Initial Concentration ◽  
Adsorption Affinity ◽  
Kinetics Of ◽  
Silica And Titania

AbstractThe paper presents the kinetics of Zn (II) ions adsorption as well as its dependence as a function of pH on nanostructured zirconium phosphate and its composites with silica and titania. The nanostructured zirconium phosphate-containing composites were obtained by mechanical processing in the Pulverisette-7 (Fritsch Gmbh) mill. The obtained composites were characterized by a heterogeneous surface coverage of silica gel or titanium oxides. Zinc ions adsorption studies on these adsorbents showed practically complete removal of Zn (II) from aqueous solutions with an initial concentration of < 0.0001 mol/dm3 and a pH > 4 within 10 min.

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