That state is summarized in the title; we now have some concepts relevant to the motions of atoms and molecules in simple reactions, and some examples of the application of these concepts. (science.sciencemag.org)
In other words, there is a division of labor among various types of cells within the sponges, which produce the self - organized biological structures through a chain of simple reactions. (sciencedaily.com)
And for simple reactions such as decomposition reactions (A to B and C) exhibiting first - order kinetics, the TOF can facilitate exploring details of the reaction (10). (sciencemag.org)