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The urease-catalyzed hydrolysis of urea displays feedback that results in a switch from acid (pH ~3) to base (pH ~9) after a controllable period of time (from 10 to >5000 s). Here we show that the spatially distributed reaction can support pH wave fronts propagating with a speed of the order of 0.1-1 mm min(-1). The experimental results were reproduced qualitatively in reaction-diffusion simulations including a Michaelis-Menten expression for the urease reaction with a bell-shaped rate-pH dependence. However, this model fails to predict that at lower enzyme concentrations, the unstirred reaction does not always support fronts when the well-stirred reaction still rapidly switches to high pH.
Magdalena M Wrobel, and
Tamás Bánsági, and
Stephen K Scott, and
Annette F Taylor, and
Chris O Bounds, and
Arturo Carranza, and
John A Pojman
August 1993,
Physical review letters,
Magdalena M Wrobel, and
Tamás Bánsági, and
Stephen K Scott, and
Annette F Taylor, and
Chris O Bounds, and
Arturo Carranza, and
John A Pojman
April 2023,
Journal of mathematical biology,
Magdalena M Wrobel, and
Tamás Bánsági, and
Stephen K Scott, and
Annette F Taylor, and
Chris O Bounds, and
Arturo Carranza, and
John A Pojman
November 2010,
The journal of physical chemistry. B,
Magdalena M Wrobel, and
Tamás Bánsági, and
Stephen K Scott, and
Annette F Taylor, and
Chris O Bounds, and
Arturo Carranza, and
John A Pojman
October 2021,
The journal of physical chemistry letters,
Magdalena M Wrobel, and
Tamás Bánsági, and
Stephen K Scott, and
Annette F Taylor, and
Chris O Bounds, and
Arturo Carranza, and
John A Pojman
January 2019,
RSC advances,
Magdalena M Wrobel, and
Tamás Bánsági, and
Stephen K Scott, and
Annette F Taylor, and
Chris O Bounds, and
Arturo Carranza, and
John A Pojman
August 2004,
Physical review. E, Statistical, nonlinear, and soft matter physics,
Magdalena M Wrobel, and
Tamás Bánsági, and
Stephen K Scott, and
Annette F Taylor, and
Chris O Bounds, and
Arturo Carranza, and
John A Pojman
April 2023,
The journal of physical chemistry. B,
Magdalena M Wrobel, and
Tamás Bánsági, and
Stephen K Scott, and
Annette F Taylor, and
Chris O Bounds, and
Arturo Carranza, and
John A Pojman
May 1984,
Journal of biomechanical engineering,
Magdalena M Wrobel, and
Tamás Bánsági, and
Stephen K Scott, and
Annette F Taylor, and
Chris O Bounds, and
Arturo Carranza, and
John A Pojman
June 1994,
Optics letters,
Magdalena M Wrobel, and
Tamás Bánsági, and
Stephen K Scott, and
Annette F Taylor, and
Chris O Bounds, and
Arturo Carranza, and
John A Pojman
August 1999,
Applied optics,
