Five-Way PPO Activity Data for Enzymatic Browning of Vegetables

Polyphenol oxidase (PPO) activity measurements from a factorial study of enzymatic browning. The MATLAB file contains Dataset Object variable enzyme; enzyme.data is a 3 x 3 x 3 x 3 x 5 array ordered pH x substrate x temperature x CO2 x O2, with PPO activity in nanomoles O2 consumed per second averaged over replicates. Useful for GEMANOVA, PARAFAC/Tucker-style tensor analysis, and higher-order chemometric method development.