ODM2 Variable Name Controlled Vocabulary ODM2 Working Group A vocabulary for describing the name of Variables. Michaelis constant The Michaelis constant is the substrate concentration at which the reaction rate is half of Vmax. Vmax represents the maximum rate achieved by the system, at saturating substrate concentration Wikipedia https://en.wikipedia.org/wiki/Michaelis%E2%80%93Menten_kinetics Added to support Critical Zone Observatory (CZO) data use cases.