Design of non-autonomous pH oscillators and the existence of chemical beat phenomenon in a neutralization reaction.

ABSTRACT: The beat in physical systems is a transparent and well-understood phenomenon. It may occur in forced oscillatory systems and as a result of the interference of two waves of slightly different frequencies. However, in chemical systems, the realization of the latter type of the beat phenomenon has been lacking. Here we show that a periodic titration of acid and alkaline solutions with each other using programmable syringe pumps in a continuous stirred-tank reactor exhibits the beat phenomenon in the temporal pH oscillation pattern if the time periods of sinusoidal inflow rates of the reagents are slightly different. Interestingly, the frequency of the chemical beat pattern follows the well-known relationship from physics, namely the frequency of the beat is equal to the absolute value of the

SUBMITTER: Lawson HS 

PROVIDER: S-EPMC8155044 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature