Reaction order
Japanese: 反応次数
A value indicating the power to which reactant concentration is raised in the rate law. A kinetic parameter for predicting fermentation reaction rates.
Reaction order is the exponent relating reaction rate to reactant concentration. In first-order reactions, rate is proportional to concentration; in second-order, to concentration squared. In zero-order, rate is independent of concentration.
Enzymatic reactions show apparent order changes with substrate concentration. At low concentrations, they behave as first-order (more substrate = faster); at high concentrations, as zero-order (enzyme saturated, rate constant).
In early miso aging, abundant substrate (protein) makes enzyme reactions near zero-order. Later, as substrate diminishes, the reaction transitions to first-order. This transition is one reason aging speed gradually slows in later stages. It bridges theory and practice. A domain where scientific perspective and practical knowledge intersect.