Extended Data Fig. 5: Schematic overview and results of classification using colorimetric readout.
From: Chemical reservoir computation in a self-organizing reaction network

a) A scatter plot showing the sampled DHA and NaOH b) each sample consists of a unique composition of compounds, depending on the conditions each compound has a specific reactivity with the reagent, this can also be viewed as a set of c) In isolation each compound would produce a different color, depending on its concentration and reactivity with the reagent. These isolated contributions cannot be observed, instead we observe one final output colour that can be considered a sum of the individual effects. d) A potential final readout. e) Result of visual readout using Benedict’s reagent after 5 min. f) Result of colorimetric test using Seliwanoff’s resorcinol reagent after 1 h and 42 min. e) Result of colorimetric test using Seliwanoff’s thymol reagent after 1 h and 55 min.