Results 61 to 70 of about 141,211 (301)

The effect of duration of diffusion on Ag diffusion coefficients in YBa2Cu3O7

Journal of Quantitative Spectroscopy and Radiative Transfer, 2005
Abstract The Ag diffusion in superconducting YBa 2 Cu 3 O 7 (YBaCuO) ceramic has been studied over the duration of the diffusion range 5–24 h in the temperature range 700–850 °C by the energy-dispersive X-ray fluorescence (EDXRF) technique. For the excitation of silver atoms, an annular Am-241 radioisotope source (50 mCi) emitting 59.543 keV photons
openaire   +1 more source

POTENTIAL SCALE DEPENDENCE OF EFFECTIVE MATRIX DIFFUSION COEFFICIENT [PDF]

, 2006
It is well known that matrix diffusion (mass transfer between fractures and the rock matrix through molecular diffusion) can significantly retard solute transport processes in fractured rock, and therefore is important for analyzing a variety of problems,
Zhou, Q., Liu, H., Zhang, Y.
core   +1 more source

Fluid Biomarkers of Disease Burden and Cognitive Dysfunction in Progressive Supranuclear Palsy

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Identifying objective biomarkers for progressive supranuclear palsy (PSP) is crucial to improving diagnosis and establishing clinical trial and treatment endpoints. This study evaluated fluid biomarkers in PSP versus controls and their associations with regional 18F‐PI‐2620 tau‐PET, clinical, and cognitive outcomes.
Roxane Dilcher, Charles B. Malpas, Stuart J. McDonald, William T. O’Brien, Craig Despott, Kelly L. Bertram, Matthew P. Pase, Lukas Frontzkowski, Meng Law, Terence J. O’Brien, Lucy Vivash   +10 more
wiley   +1 more source

Thin-Layer Drying Model, Drying Rate, and Effective Water Diffusion Coefficient of Pelleted Feed

International Journal of Chemical Engineering
In this study, classic thin-layer drying models such as the Page model, Verma model, and Two-term model were used to fit the thin-layer drying data of feed.
Wei Wang, Jiyuan Chen, Nan Jin, Hongying Wang, Liangju Wang, Junhua Wu   +5 more
doaj   +1 more source

Functional and Structural Evidence of Neurofluid Circuit Aberrations in Huntington Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Disrupted neurofluid regulation may contribute to neurodegeneration in Huntington disease (HD). Because neurofluid pathways influence waste clearance, inflammation, and the distribution of central nervous system (CNS)–delivered therapeutics, understanding their dysfunction is increasingly important as targeted treatments emerge.
Kilian Hett, Abigail Dubois, Melanie Leguizamon, Alexander Song, Paula Trujillo, Colin D. McKnight, Ciaran M. Considine, Manus J. Donahue, Daniel O. Claassen   +8 more
wiley   +1 more source

Thermodynamic properties and drying kinetics of Bauhinia forficata Link leaves

Revista Brasileira de Engenharia Agrícola e Ambiental
The aim of this study was to determine the effective diffusion coefficient and the thermodynamic properties of Bauhinia forficata Link leaves, considering two forms of thickness measurements and to describe the process by fitting mathematical models. The
Fernanda P. da Silva, Valdiney C. Siqueira, Elton A. S. Martins, Fábio M. N. Miranda, Rogerio M. Melo   +4 more
doaj   +1 more source

Unbiased Diffusion through a Linear Porous Media with Periodic Entropy Barriers: A Tube Formed by Contacting Ellipses

Journal of Chemistry, 2015
This work is devoted to the study of unbiased diffusion of point-like Brownian particles through channels with radial symmetry of varying cross-section and elliptic shape.
Yoshua Chávez, Marco-Vinicio Vázquez, Leonardo Dagdug   +2 more
doaj   +1 more source

Experimental Measurement of Effective Diffusion Coefficient in Gas Diffusion Layer/Microporous Layer in PEM Fuel Cells [PDF]

, 2011
Accuracy in the effective diffusion coefficient of the gas diffusion layer (GDL)/microporous layer (MPL) is important to accurately predict the mass transport limitations for high current density operation of polymer electrolyte membrane (PEM) fuel cells.
Chan, Carl
core  

Scale Dependence of Effective Matrix Diffusion Coefficient Evidence and Preliminary Interpertation [PDF]

, 2006
The exchange of solute mass (through molecular diffusion) between fluid in fractures and fluid in the rock matrix is called matrix diffusion. Owing to the orders-of-magnitude slower flow velocity in the matrix compared to fractures, matrix diffusion can ...
Liu, H.H., Zhang, Y.
core   +1 more source

Structure–Function Decoupling of the Sensorimotor and Default Mode Networks in Black Americans With MS

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background and Objectives Multiple sclerosis (MS) exhibits racially disparate rates of disease progression. Black people with MS (B‐PwMS) experience a more severe disease course than non‐Hispanic White people with MS (NHW‐PwMS). Here we investigated structural and functional connectivity as well as structure–function decoupling in the ...
Emilio Cipriano, Giacomo Boffa, Maria Petracca, Marta Ponzano, Nicole Graziano, Claire Wigley, Claire Riley, Jonathan Howard, Pietro Bontempi, Sylvia Klineova, Fred Lublin, Matilde Inglese   +11 more
wiley   +1 more source