Klebsiella aerogenes was grown in chemostat culture with the pH controlled to +/-0.01 and temperature to +/-0.1 degrees C. The oxygen tension of the culture was regulated by changing the partial pressure of oxygen in the gas phase and recorded by means of an oxygen electrode. Reduced pyridine nucleotide was monitored continuously in the culture by means of direct fluorimetry. On applying an ana...

Spontaneous oscillations displayed by hair bundles of the bullfrog sacculus have complex temporal profiles, not fully captured by single limit-cycle descriptions. Quiescent intervals are typically interspersed with oscillations, leading to a bursting-type behavior. Temporal characteristics of the oscillation are strongly affected by imposing a mechanical load or by the application of a steady-s...

Square-wave oscillations exhibiting different plateau lengths have been observed experimentally by investigating an electro-optic oscillator. In a previous study, we analysed the model delay differential equations and determined an asymptotic approximation of the two plateaus. In this paper, we concentrate on the fast transition layers between plateaus and show how they contribute to the total ...

Microscopic potential turbulence in tokamak plasmas are investigated by a multi-samplevolume heavy ion beam probe. The wavenumber/frequency spectra S(k,ω) of the plasmas potential fluctuation as well as density fluctuation are obtained for the first time. The instantaneous turbulence-driven particle flux, calculated from potential and density turbulence has oscillations of which amplitude is ab...

A unified theory of self-sustained current oscillations (SSCOs) is presented. We establish these oscillations as the manifestations of limit cycles, around unstable steady-state solutions caused by the negative differential conductance. This theory implies that both the generation and the motion of an electric-field domain boundary are universal in the sense that they do not depend on the initi...

We study nonequilibrium steady states of lattice gases with nearest-neighbor interactions that are driven between two reservoirs. Density profiles in these systems exhibit oscillations close to the reservoirs. We demonstrate that an approach based on time-dependent density functional theory copes with these oscillations and predicts phase diagrams of bulk densities to a good approximation under...

In the context of tissue engineering, we recently proposed a lattice model for a bioactive porous tissue scaffold [A. L. Krause, D. Beliaev, R. A. Van Gorder, and S. L. Waters, Lattice and Continuum Modelling of a Bioactive Porous Tissue Scaffold, arXiv:1702.07711 [q-bio], (2017)]. This model considered the scaffold as a lattice of pores, with coupling between local cell growth in the pores, an...

Reaction temperature plays a major role in product selectivity in the oscillatory mode of the palladium-catalyzed phenylacetylene oxidative carbonylation reaction. At 40 °C, dimethyl (2Z)-2-phenyl-2-butenedioate is the major product whereas at 0 °C the major product is 5,5-dimethoxy-3-phenyl-2(5H)-furanone. The occurrence of oscillations in pH coincides with an increase in the rate of phenylace...

<p style='text-indent:20px;'>We investigate spatiotemporal patterns near the Turing-Hopf and double Hopf bifurcations in a diffusive Holling-Tanner model on one- dimensional spatial domain. Local global stability of positive constant steady state for non-delayed system is studied. Introducing generation time delay prey growth, we discuss existence give explicit dynamical classification th...

A model with two time delays is presented for modeling the insulin secretion ultradian oscillations in the glucose-insulin metabolic system. One delay is for the insulin response time delay (around 6 minutes) to the glucose concentration level increase, and the other is for the hepatic glucose production time delay (around 36 minutes). The results of the analysis of this model are in agreement ...