(The research also shows other subsets of smooth muscle cells were transitioning to cells resembling stem cells and myofibroblasts.) (sciencedaily.com)
«Prior to our study, it was not known whether the catalysis, which takes place on the surface of the cobalt oxide crystallites, happens at every cobalt center on the surface at the same speed, or whether a subset of cobalt sites does most of the work while other subsets are slow or merely spectators, Frei says. (newscenter.lbl.gov)
This idea depends on developments in general systems theory, which views «all of nature and all of human activity as a hierarchically arranged structure of levels of interlocked subset systems in which the process of any particular subset system affects and is affected by other subset systems at its own level, as well as below or above it.» (religion-online.org)