نتایج جستجو برای: fickian diffusion
تعداد نتایج: 163547 فیلتر نتایج به سال:
A finite difference lattice Boltzmann scheme for homogeneous mixture modeling, which recovers Maxwell-Stefan diffusion model in the continuum limit, without the restriction of the mixture-averaged diffusion approximation, was recently proposed [P. Asinari, Phys. Rev. E 77, 056706 (2008)]. The theoretical basis is the Bhatnagar-Gross-Krook-type kinetic model for gas mixtures [P. Andries, K. Aoki...
Water-soluble AstaSana astaxanthin (AST) was loaded into 75/25 blend films made of polysaccharides (carboxymethyl cellulose (CMC), gum Arabic (GAR), starch sodium octenyl succinate (OSA), water-soluble soy (WSSP)) and gelatin (GEL) at levels 0.25, 0.5, 1%, respectively. Due to the presence granules in AST formulation, supplemented exhibited increased surface roughness as compared AST-free films...
Abstract Green nanocomposite hydrogels (ST-PHEMA/GO) comprised of starch and 2-Hydroxyethyl methacrylate (HEMA) reinforced with different ratios graphene oxide (GO) were prepared via gamma radiation induced crosslinking polymerization. The chemical structure morphology the crystallinity studied by FTIR FE-SEM, AFM, TEM XRD, respectively. swelling behavior claimed was verified versus time pH-dep...
Quasi-diffusion imaging (QDI) is a novel quantitative diffusion magnetic resonance (dMRI) technique that enables high quality tissue microstructural in clinically feasible acquisition time. QDI derived from special case of the continuous time random walk (CTRW) model dynamics and assumes water locally Gaussian within microstructure. By assuming scaling relationship between temporal (?) spatial ...
Here, we propose a novel attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy method for simultaneously monitoring the curing reaction and diffusion behavior of agents at surface rubber in real-time. The proposed scheme was demonstrated by fluorine (FKM) FKM/carbon nanotube (CNT) nanocomposites with target agent triallyl-isocyanurate (TAIC). broadening evolution C=O st...
Background & Objectives: Dermal exposure to chemical agents can result in a variety of occupational diseases and disorders, including occupational skin diseases and systemic toxicity . T he present paper focused on transport properties of nanocomposite based on carboxylated nitrile butadiene rubber (XNBR)-nanoclay. Methods: In this study, XNBR gloves nanocomposite were prepared a...
We present a theory of turbulent elasticity, a property of drift-wave-zonal-flow (DW-ZF) turbulence, which follows from the time delay in the response of DWs to ZF shears. An emergent dimensionless parameter |〈v〉'|/Δωk is found to be a measure of the degree of Fickian flux-gradient relation breaking, where |〈v〉'| is the ZF shearing rate and Δωk is the turbulence decorrelation rate. For |〈v〉'|/Δ...
The moisture absorption behavior of a composite comprising phenolic resin and activated carbon fibers was characterized. starts with water content from curing the active both adsorb on their surface absorb in sub-surface pores, acting as sink or source water. Measured data showed that dependence this uptake surrounding relative humidity highly nonlinear, effective diffusion rate through very de...
The release kinetics for a variety of proteins of a wide range of molecular mass, hydrodynamic radii, and isoelectric points through a nanofiber hydrogel scaffold consisting of designer self-assembling peptides were studied by using single-molecule fluorescence correlation spectroscopy (FCS). In contrast to classical diffusion experiments, the single-molecule approach allowed for the direct det...
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