Results 21 to 30 of about 145,583 (300)
Effective diffusivity of sulfuric acid in Antarctic ice cores [PDF]
Climate of the PastDeposition of sulfuric acid in ice cores is important both for understanding past volcanic activity and for synchronizing ice core timescales. Sulfuric acid has a low eutectic point, so it can potentially exist in liquid at grain boundaries and veins ...
T. J. Fudge +6 more
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Effective diffusions with intertwined structures
Matemática Contemporânea, 2023 Let p:N->M be a surjective map of smooth manifolds. We are concerned with singular perturbation problems associated to a pair of second order positive definite differential operators with no zero order terms, that are intertwined by p. We discuss the associated random perturbations of stochastic differential equations and present a number of ...
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Effects of Proteins on Protein Diffusion [PDF]
Journal of the American Chemical Society, 2010 Despite increased attention, little is known about how the crowded intracellular environment affects basic phenomena like protein diffusion. Here, we use NMR to quantify the rotational and translational diffusion of a 7.4-kDa test protein, chymotrypsin inhibitor 2 (CI2), in solutions of glycerol, synthetic polymers, proteins, and cell lysates.
Yaqiang, Wang +2 more
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Energies, 2021 The effect of drying temperature and the application of ultrasound on drying kinetics of Lawsonia inermis (henna) leaves and the extraction of lawsone from the dried samples was addressed.
Said Bennaceur +6 more
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Diffusion Effect in Quantum Hydrodynamics
Axioms, 2022 In this paper, we introduce (at least formally) a diffusion effect that is based on an axiom postulated by Werner Heisenberg in the early days of quantum mechanics. His statement was that—in quantum mechanics—kinematical quantities such as velocity must be treated as complex matrices.
Moise Bonilla-Licea +2 more
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Fast Models for Predicting Pollutant Dispersion inside Urban Canopies
Atmosphere, 2023 A fast pollutant dispersion model for urban canopies is developed by coupling mean wind profiles to a parameterisation of turbulent diffusion and solving the time-dependent advection–diffusion equation.
Huanhuan Wang +2 more
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On the effect of the molecular diffusivity in turbulent diffusion [PDF]
Journal of Fluid Mechanics, 1960 It is shown that the dispersion of a substance, with molecular diffusivity κ, in a stationary, homogeneous, turbulent velocity field can be formulated in terms of a ‘substance auto-correlation function’, this being a generalization of the well-known Lagrangian correlation between the velocity of a fluid particle at different times. It is found that the
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Large-scale effects on meso-scale modeling for scalar transport [PDF]
, 2005 The transport of scalar quantities passively advected by velocity fields with a small-scale component can be modeled at meso-scale level by means of an effective drift and an effective diffusivity, which can be determined by means of multiple-scale ...
Cencini, M. +3 more
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Modeling and Effects of Various Drying Methods on Sweet Potato Starch Properties
Walailak Journal of Science and Technology, 2011 Eleven mathematical models (Lewis, Page, Henderson and Pabis, modified Henderson and Pabis, Wang and Singh, logarithmic, two term, two term exponential, Midilli, approximation of diffusion and Verma et al, model) were used for describing the drying ...
Ho Minh THAO, Athapol NOOMHORM
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DRYING KINETICS OF PEANUT KERNELS IN THIN LAYERS [PDF]
Engenharia Agrícola, 2017 : The aim of this study was to adjust mathematical models to the experimental data on the peanut kernels drying in thin layer, as well as to determine the effective diffusion coefficient and the main thermodynamic properties involved in drying of the ...
André L. D. Goneli +4 more
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