The effect of density and water tension on the oxygen diffusion coefficient in different growing media and the dependence on air content were investigated. The results show that both water tension and density have a major influence on oxygen diffusion. With increasing density and moisture content, ...
70,73 The diffusion coefficient is directly dependent upon the solubility of the gas and inversely proportional to the square root of the molecular weight of the gas. With these formulas it can be demonstrated that carbon dioxide has a much higher solubility than oxygen in water (24 : 1...
It is, therefore, probable that the cell membranes could be a barrier to oxygen diffusion. Since the diffusion coefficient is inversely proportional to the membrane viscosity, the distribution of the conductance for oxygen diffusion in the barrier can be calculated. Hence the influence of the ...
The aim of this study was to investigate the influence of humic substances (HS) on volumetric oxygen transfer coefficient (KLa) under different turbulence intensities at the air﹚ater interface. The experiments were carried out in an oscillating grid tank which provided three levels of turbulence ...
From the IGA data we can diffusion coefficient, Da, to be estimate the in the range air 10 À(870–%10NÀ29acnmd22s0À%1Ofo2r) the CH3NH3PbI3 perovskite material (calculations provided in SI). This value is comparable to the fast diffusion of gases into polymer thin films where, ...
The oxygen transfer in conventional HFCW is poor and inconsistent, which occurs mainly via convection and diffusion from the air to the surface water with estimated oxygen transfer rates of 0.3–3.2 g O2 m−2 d−1 (Kadlec and Wallace, 2009). The conventional VFCW allows oxygen transfer ...
doertOerRmRin, Feadrcaudraryecnot,nksitnanetti(c9c6u4r8r5e.n3t4d Ce nmsoitli−e1s)(,mviAscocmsit−y2o),freoletacttiroon- lyte (0.01 cm2/s), oxygen concentration in the electrolyte (1.26 × 10−6 mol cm−3), and oxygen diffusion coefficient in electrolyte ...
The following parameters are of importance: gas phase diffusion coefficient, air-water interfacial area, air-water transfer coefficient, volumetric water content, gas solubility in water, and gas concentration in solution. These parameters are indirectly dependent on total porosity, air-filled porosity,...
Oxygen self-diffusion in rutile was studied in synthetic and natural samples over the temperature range 750 to 1000 ℃and the pressure range 0.1 to 1000 MPa using an 18 O- enriched source. Most experiments investigated the dependence of D on temperature,
1) diffusion coefficient of oxygen 氧气扩散系数 1. The law ondiffusion coefficient of oxygeninfluenced by constructive method . 为了确定施工方法与钢筋位置对混凝土氧气扩散系数的影响规律,应用中国矿业大学耿欧教授的混凝土氧气扩散系数测试装置,在不同温湿度和水灰比的条件下,对钢筋混凝土的上保护层和下保护层...