Results 31 to 40 of about 586,973 (295)

Evaluating the effective diffusion coefficient of reactant gas in the catalyst layer of PEMFC using the fractal method considering the pore size distribution

Nano Select, 2021
The pore size distribution of the catalyst layer (CL) significantly influences the effective diffusion coefficient (EDC) of the reactant gas due to the Knudsen diffusion effect in the proton exchange membrane fuel cell (PEMFC).
Yan Yin, Shiyu Wu, Yanzhou Qin, Yuwen Liu, Junfeng Zhang   +4 more
doaj   +1 more source

Hemostasis radiotherapy for gastric cancer: Usefulness of the gastric cancer to spleen apparent diffusion coefficient ratio

Radiology Case Reports, 2022
The hemostatic effect of radiation therapy on gastric cancer with bleeding is known. However, blood tests and endoscopes are mainly used to determine the therapeutic effect.
Osamu Tanaka, MD, Tomomichi Matsushita, MD, Ryoshu Maejima, RT, Shuji Kariya, RT, Takuya Taniguchi, MP, Kousei Ono, MP, Chiyoko Makita, MD, Masayuki Matsuo, MD   +7 more
doaj   +1 more source

The Steady-State Transport of Oxygen through Hemoglobin Solutions [PDF]

, 1966
The steady-state transport of oxygen through hemoglobin solutions was studied to identify the mechanism of the diffusion augmentation observed at low oxygen tensions. A novel technique employing a platinum-silver oxygen electrode was developed to measure
Friedlander, S. K., Keller, K. H.
core   +2 more sources

Direct determination of the diffusion coefficient variation of coal based on Fick's law and model establishment

Meitan kexue jishu, 2023
Gas diffusion ability directly affects gas exploitation, outburst risk, emission and content determination. In order to study the influence of stress, gas pressure and temperature on gas diffusion coefficient in coal, the gas diffusion coefficient in ...
Yujin QIN, Fenghua AN, Weiwei SU, Hongfu JIA, Xiangjun CHEN   +4 more
doaj   +1 more source

Impact of water vapor diffusion and latent heat on the effective thermal conductivity of snow [PDF]

The Cryosphere, 2021
Heat transport in snowpacks is understood to occur through the two processes of heat conduction and latent heat transport carried by water vapor, which are generally treated as decoupled from one another. This paper investigates the coupling between both
K. Fourteau, F. Domine, F. Domine, P. Hagenmuller   +3 more
doaj   +1 more source

A Multiscale Approach to Brownian Motors [PDF]

, 2005
The problem of Brownian motion in a periodic potential, under the influence of external forcing, which is either random or periodic in time, is studied in this paper. Multiscale techniques are used to derive general formulae for the steady state particle
Pavliotis, G. A.
core   +1 more source

Macroscopic water vapor diffusion is not enhanced in snow [PDF]

The Cryosphere, 2021
Water vapor transport in dry snowpacks plays a significant role for snow metamorphism and the mass and energy balance of snowpacks. The molecular diffusion of water vapor in the interstitial pores is usually considered to be the main or only transport ...
K. Fourteau, F. Domine, F. Domine, P. Hagenmuller   +3 more
doaj   +1 more source

Kinetic description of particle interaction with a gravitational wave [PDF]

, 1997
The interaction of charged particles, moving in a uniform magnetic field, with a plane-polarized gravitational wave is considered using the Fokker-Planck- Kolmogorov (FPK) approach.
A. Anastasiadis, B. V. Chirikov, B. V. Chirikov, C. W. Misner, D. Farina, D. Farina, D. Papadopoulos, F. P. Esposito, G. M. Zaslavskii, H. Varvoglis, H. Varvoglis, H. Varvoglis, I. S. Gradshteyn, J. Ford, J. Greene, K. Hizanidis, K. Kleidis, K. Kleidis, K. Kleidis, K. S. Thorne, L. Smarr, M. Abramowitz, P. G. Macedo, P. G. Macedo, R. P. Kanwal   +24 more
core   +2 more sources

Nonlinear and Linear Equation of Gas Diffusion in Coal—Theory and Applications

Applied Sciences, 2021
The authors derived the analytical solution to diffusion equations. The solution requires linearization of diffusion equations, as well as developing the obtained expression into a series.
Marek Gawor, Norbert Skoczylas, Anna Pajdak, Mateusz Kudasik   +3 more
doaj   +1 more source

Substrate concentration dependence of the diffusion-controlled steady-state rate constant [PDF]

, 2004
The Smoluchowski approach to diffusion-controlled reactions is generalized to interacting substrate particles by including the osmotic pressure and hydrodynamic interactions of the nonideal particles in the Smoluchoswki equation within a local-density ...
Allen M. P., Chaplin M., Dhont J., Hansen J.-P., J. A. McCammon, J. Dzubiella, Rice S. A., von Smoluchowski M.   +7 more
core   +1 more source