title: Pattern formation in the iodate-sulfite-thiosulfate reaction-diffusion system.
abstract: Sodium polyacrylate-induced pH pattern formation and starch-induced iodine pattern formation were investigated in the iodate-sulfite-thiosulfate (IST) reaction in a one-side fed disc gel reactor (OSFR). As binding agents of the autocatalyst of hydrogen ions or iodide ions, different content of sodium polyacrylate or starch has induced various types of pattern formation. We observed pH pulses, striped patterns, mixed spots and stripes, and hexagonal spots upon increasing the content of sodium polyacrylate and observed iodine pulses, branched patterns, and labyrinthine patterns upon increasing the starch content in the system. Coexistence of a pH front and an iodine front was also studied in a batch IST reaction-diffusion system. Both pH and iodine front instabilities were observed in the presence of sodium polyacrylate, i.e., cellular fronts and transient Turing structures resulting from the decrease in diffusion coefficients of activators. The mechanism of multiple feedback may explain the different patterns in the IST reaction-diffusion system.
authors: College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors: Haimiao
authors: H
authors: Liu
authors: John A
authors: JA
authors: Pojman
authors: Yuemin
authors: Y
authors: Zhao
authors: Changwei
authors: C
authors: Pan
authors: Juhua
authors: J
authors: Zheng
authors: Ling
authors: L
authors: Yuan
authors: Attila K
authors: AK
authors: Horváth
authors: Qingyu
authors: Q
authors: Gao