Cell irreversible

It is to be noted that zinc is not deposited on the zinc electrode. In the case of this cell, the second condition of reversibility is not satisfied even though the first condition may be satisfied. The cell is, therefore, irreversible. As an additional example of cell irreversibility mention may be made of the cell having a liquid junction. 

It has been previously emphasized that cancer chemotherapy involves a process of differential and selective toxicity. Agents are used that injure neoplastic cells and normal cells and the goal is to damage the neoplastic cells irreversibly and allow the normal cells and tissues to recover sooner. In addition, it is important to ameliorate the unpleasant side effects and to support the patient. Discussion of a few major toxicities is in order. 

Fuel Cell Irreversibilities - Causes of Voltage Drop... 

In reality, the cell operating voltage would be lower than the value given by Equation 4.21 because of voltage losses caused by a number cell irreversibilities associated with the electrochemical reactions and transport processes that will be discussed in later chapters. 

The sequence of events involved in the initial fouling process has been investigated (8), and a two-phase attachment process with a reversible and irreversible attachment phase was described. During the initial reversible phase, bacteria are held to the surface by weak attractions. Firmer binding occurs when physical and chemical forces combine to hold the bacterial cells irreversibly to the surface (e.g. via extracellular polymeric material). The initial fouling process is probably preceded by adsorption of dissolved organic... 

High operating temperature and cell potential (> 0.8 V) corrodes the cell irreversibly. The controllers and the power conditioners should be so designed that under no load/low load condition, the build up of potential should be avoided and under high current temperature rise should be controlled as well. 

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