Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Absorption of Radiation01:05

Absorption of Radiation

The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
Passive Diffusion: Overview and Kinetics01:17

Passive Diffusion: Overview and Kinetics

Passive diffusion is a critical process that allows small lipophilic drugs to cross the cell membrane along a concentration gradient. This mechanism's efficiency depends on four primary factors: the membrane's surface area, the drug's lipid-water partition coefficient, the concentration gradient, and the membrane's thickness.
When administered orally, drugs establish a substantial concentration gradient between the gastrointestinal (GI) lumen and the bloodstream, expediting their diffusion into...
Diffusion01:12

Diffusion

Diffusion is the passive movement of substances down their concentration gradients—requiring no expenditure of cellular energy. Substances, such as molecules or ions, diffuse from an area of high concentration to an area of low concentration in the cytosol or across membranes. Eventually, the concentration will even out, with the substance moving randomly but causing no net change in concentration. Such a state is called dynamic equilibrium, which is essential for maintaining overall...
Diffusion01:21

Diffusion

Diffusion is a type of passive transport. In passive transport, a substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space. For example, take the diffusion of substances through the air. When someone opens a perfume bottle in a room filled with people, the perfume is at its highest concentration in the bottle and is at its lowest at the edges of the room. The perfume vapor will diffuse, or spread away, from the...
UV–Vis Spectroscopy: Beer–Lambert Law01:09

UV–Vis Spectroscopy: Beer–Lambert Law

The Beer-Lambert law describes the relationship between absorbance and concentration, which combines the principles established by scientists Johann Heinrich Lambert and August Beer. Lambert's law states that when light passes through a medium, the loss in intensity is directly proportional to the original intensity and the path length of the light. Beer's law proposed that the transmittance of a solution remains constant if the product of concentration and path length is constant. The modern...
Carrier Transport01:21

Carrier Transport

The generation of electrical current in semiconductors is fundamentally driven by two mechanisms: drift and diffusion. These processes are essential for the functionality and performance of semiconductor-based devices.
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Six-beam models in radiative transfer theory.

Applied optics·2010
Same author

Binding of native kappa-neurotoxins and site-directed mutants to nicotinic acetylcholine receptors.

Toxicon : official journal of the International Society on Toxinology·1996
Same author

Single-channel recording in brain slices reveals heterogeneity of nicotinic receptors on individual neurons within the chick lateral spiriform nucleus.

Brain research·1996
Same author

X-ray analysis reveals conformational adaptation of the linker in functional calmodulin mutants.

Nature structural biology·1995
Same author

Functional heterogeneity of nicotinic receptors in the avian lateral spiriform nucleus detected with trimethaphan.

Molecular pharmacology·1994
Same author

[Study of crystals of aspartate aminotransferase complexed with D-aspartate].

Molekuliarnaia biologiia·1994
Same journal

Multifunctional reconfigurable terahertz metasurface based on vanadium dioxide phase transition: achieving broadband absorption and efficient polarization conversion.

Applied optics·2026
Same journal

High-Q-factor electromagnetically induced transparency utilizing quasi-bound states in the continuum in an all-dielectric terahertz metasurface.

Applied optics·2026
Same journal

Automated stitching interferometry for high-precision metrology of X-ray mirrors.

Applied optics·2026
Same journal

Experimental demonstration of an approach to designing a metal-dielectric DBR resonant cavity structure.

Applied optics·2026
Same journal

High-precision wavefront reconstruction from a single-shot interferogram using a physics-driven hybrid feature calibration network.

Applied optics·2026
Same journal

Ultra-high-Q Fano resonance based on coupled topological corner states in Kagome photonic crystals.

Applied optics·2026
See all related articles

Related Experiment Video

Updated: Jun 15, 2026

The Diffusion of Passive Tracers in Laminar Shear Flow
08:01

The Diffusion of Passive Tracers in Laminar Shear Flow

Published on: May 1, 2018

Diffusion approximation for large absorption in radiative transfer.

W E Meador, W R Weaver

    Applied Optics
    |March 9, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A novel diffusion model simplifies radiative transfer in particulate media by incorporating higher Legendre moments. This approach avoids complex equations while accurately modeling radiative properties, even with high absorption.

    More Related Videos

    Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy
    09:16

    Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy

    Published on: January 9, 2017

    Molecular Diffusion in Plasma Membranes of Primary Lymphocytes Measured by Fluorescence Correlation Spectroscopy
    12:06

    Molecular Diffusion in Plasma Membranes of Primary Lymphocytes Measured by Fluorescence Correlation Spectroscopy

    Published on: February 1, 2017

    Related Experiment Videos

    Last Updated: Jun 15, 2026

    The Diffusion of Passive Tracers in Laminar Shear Flow
    08:01

    The Diffusion of Passive Tracers in Laminar Shear Flow

    Published on: May 1, 2018

    Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy
    09:16

    Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy

    Published on: January 9, 2017

    Molecular Diffusion in Plasma Membranes of Primary Lymphocytes Measured by Fluorescence Correlation Spectroscopy
    12:06

    Molecular Diffusion in Plasma Membranes of Primary Lymphocytes Measured by Fluorescence Correlation Spectroscopy

    Published on: February 1, 2017

    Area of Science:

    • Physics
    • Optics
    • Computational Science

    Background:

    • Radiative transfer in particulate media is crucial for various applications.
    • Existing models often involve complex mathematical formulations.
    • Accurate modeling is needed for scenarios with significant absorption.

    Purpose of the Study:

    • To develop a simplified yet accurate diffusion model for radiative transfer in particulate media.
    • To incorporate higher-order Legendre moments without increased mathematical complexity.
    • To extend the applicability of the Eddington approximation to problems with large absorption.

    Main Methods:

    • Developed a new diffusion model for radiative transfer.
    • Included higher Legendre moments.
    • Avoided solving complex coupled differential equations and higher-order boundary conditions.
    • Extrapolated the Eddington approximation for high absorption scenarios.

    Main Results:

    • The model accurately represents radiative transfer in particulate media.
    • It successfully incorporates higher Legendre moments.
    • The method is effective for problems with large absorption.
    • The model's assumptions are nonrestrictive for medium properties and phase functions.

    Conclusions:

    • The new diffusion model offers a computationally efficient approach to radiative transfer in particulate media.
    • It provides an accurate extrapolation of the Eddington approximation for highly absorbing media.
    • The model's simplifying assumptions allow broad applicability while maintaining accuracy.