Role of Vibrational Excitation of the Adlayer in 'Precursor-Mediated' Sticking Probabilities of CO on Metal Surfaces: A Kinetic Model

2012 ◽  
Vol 226 (4) ◽  
pp. 253-274
Author(s):  
Ettore Molinari ◽  
Massimo Tomellini
Keyword(s):  
Kinetic Model ◽  
Metal Surfaces ◽  
Vibrational Excitation ◽  
Sticking Probabilities

Kinetic Aspects of the Interplay of Cancer and the Immune System

2019 ◽  
Vol 14 (02) ◽  
pp. 101-114 ◽  
Author(s):  
Vladimir P. Zhdanov
Keyword(s):  
Stem Cells ◽  
Immune System ◽  
Kinetic Model ◽  
Human Population ◽  
Lifetime Risk ◽  
Risk Of Cancer

The understanding of the interplay between cancer and the immune system is still limited. Herein, I focus on two aspects of this interplay. First, I propose a kinetic model describing the likely role of the immune system in the lifetime risk of cancer at the level of the whole human population. For each tissue, the risk is predicted to be influenced by the heterogeneity of the population and to depend exponentially on time. The expression for the risk does not, however, depend explicitly on the total number of divisions of the corresponding stem cells. For this reason, the correlation with the latter number can only be indirect. Second, using another kinetic framework, I describe how the growth of a few tumors can depend on their interaction via the immune system. The analysis shows that depending on specific details, the tumors of different sizes tend either to reach the same size or remain to be of different sizes.

Trends in water-promoted oxygen dissociation on the transition metal surfaces from first principles

2017 ◽  
Vol 19 (3) ◽  
pp. 2364-2371 ◽  
Author(s):  
Ming Yan ◽  
Zheng-Qing Huang ◽  
Yu Zhang ◽  
Chun-Ran Chang
Keyword(s):  
Transition Metal ◽  
First Principles ◽  
Metal Surfaces ◽  
Oxygen Dissociation ◽  
Transition Metal Surfaces

The trend of O2 dissociation on the nine transition metal surfaces and the promotional role of water were systematically investigated.

scholarly journals A review of fungal influenced corrosion of metals

2021 ◽  
Vol 62 (4) ◽  
pp. 333-339
Author(s):  
Imo Okorie ◽  
Romanus Nwokorie
Keyword(s):  
Growth Pattern ◽  
Metal Surfaces ◽  
Structural Integrity ◽  
Great Influence ◽  
Fungal Growth ◽  
Corrosive Media ◽  
Electrochemical Processes ◽  
Single Mechanism ◽  
Growth Of Fungi

The growth of fungi on the surface of metals has great influence on their structural integrity and failure. Their growth on metal surfaces is determined by their secreted metabolites which enable them to adapt to new environmental and nourishment conditions. Although information on the capacity of fungi to adapt to metal surfaces is scarce, most fungi growing on metal surfaces alter the composition of the metals involving it in the process of functional growth and metabolism. Changes in the composition and colour of the metals are some of the evidences confirming that fungus has penetrated the metal surfaces and use it to satisfy its nutritional need with resultant corrosion. In this work we tried to explain different mechanisms of fungal influenced corrosion from different perspectives ranging from the role of biofilms, corrosive media generation by fungal metabolism processes to electrochemical processes generated by fungal growth on metal surfaces. Finally, no single mechanism can conclusively explain all forms of fungal influenced corrosion because every mechanism is unique and applies to individual fungus, its metabolic biproducts or the growth pattern.

Sign in / Sign up

Export Citation Format

Share Document