Oxygen Diffusion in Tissue Preparations with Michaelis–Menten Kinetics

On oxygen diffusion in a spherical cell with Michaelis-Menten oxygen uptake kinetics.

describes the steady-state oxygen diffusion in a spherical cell with MichaelisMenten oxygen uptake kinetics (Lin, 1976; McElwain, 1978). Throughout the paper, primes denote differentiation with respect to r. A l l quantities in (1) and (2) are dimensionless, where the normalized variables C and r represent the oxygen tension and the radial distance. The radius of the cell corresponds to r = 1, ...

Oxygen Diffusion in YBa

The oxygen diffusion in Y B a X u j O ^ , , was studied between 300 K and 1273 K in flowing oxygen by monitoring the 1 3 Ba(EC) Cs nuclear quadrupole interaction by time differential perturbed angular correlation. The data are analyzed in a model of two different nearest neighbour oxygen configurations and yield hopping rates, the energy barrier and the difference in free enthalpy between both ...

Evidence that diffusion limitation determines oxygen uptake kinetics during exercise in humans.

To determine the role of arterial O2 content on the mechanism of muscle O2 utilization, we studied the effect of 2, 11, and 20% carboxyhemoglobin (COHb) on O2 uptake (VO2), and CO2 output (VCO2) kinetics in response to 6 min of constant moderate- and heavy-intensity cycle exercise in 10 subjects. Increased COHb did not affect resting heart rate, VO2 or VCO2. Also, the COHb did not affect the as...

Fast oxygen exchange and diffusion kinetics of grain boundaries in Sr-doped LaMnO3 thin films.

In this study, the contribution of grain boundaries to the oxygen reduction and diffusion kinetics of La0.8Sr0.2MnO3 (LSM) thin films is investigated. Polycrystalline LSM thin films with columnar grains of different grain sizes as well as epitaxial thin films were prepared by pulsed laser deposition. (18)O tracer exchange experiments were performed at temperatures from 570 °C to 810 °C and subs...

Diffusion-Controlled Reaction Kinetics