Reaction kinetics, middle region

Mind you, like many of the authors of this book, I have the view that the reaction mechanism at the interface is important in electrode kinetics. This outlook originated from the fact that, in my education, I got to study, and become impressed by the breadth of electrode kinetics in the middle region from my earlier study of chemical kinetics. ... 

Middle Envelope Region Reaction Kinetics and Dust-Gas Reactions... 

The condition of transition from the intermediate region to the kinetic region (point A in Fig. 1) can be mathematically expressed as the penetration of the reaction to the middle of the catalyst ... 

---