Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Intensity Of Electromagnetic Waves

Intensity Of Electromagnetic Waves

The energy transport per unit area per unit time, or the Poynting vector, gives the energy flux of an electromagnetic wave at any specific time. For a plane electromagnetic wave with E0 and B0 as the peak electric and magnetic fields and traveling along the x-axis, the time-varying energy flux can be given by the following equation:

Interaction of EM Radiation with Matter: Spectroscopy

Interaction of EM Radiation with Matter: Spectroscopy

Electromagnetic (EM) radiation can be considered an oscillating electric and magnetic field propagating through a medium that can interact with matter in its path. The electric field in the radiation can interact with electrical charges in the atoms or molecules in the matter. On the other hand, the magnetic field can interact with the magnetic field in the atomic nucleus. The study of the interaction between electromagnetic radiation and matter is termed spectroscopy. Spectroscopy is the study...

Dual Nature of Electromagnetic (EM) Radiation

Dual Nature of Electromagnetic (EM) Radiation

Electromagnetic (EM) radiation consists of electric and magnetic field components oscillating in planes perpendicular to each other and mutually perpendicular to radiation propagation through space. EM radiation can be classified as a wave, characterized by the properties of waves such as wavelength (denoted as λ) and frequency (represented by ν).
Wavelength is the distance between two consecutive peaks (the highest point) or troughs (the lowest point) in the wave. Frequency is the number of...

Biological Effects of Radiation

Biological Effects of Radiation

All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they produce ions...

You might also read

Related Articles

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

Sort by

Same author

Pineal indoles stimulate the gene expression of immunomodulating cytokines.

Journal of neural transmission (Vienna, Austria : 1996)·2001

Same author

Transfer of full-length Dmd to the diaphragm muscle of Dmd(mdx/mdx) mice through systemic administration of plasmid DNA.

Molecular therapy : the journal of the American Society of Gene Therapy·2001

Same author

Synthesis of a new class of 5'-functionalized adenosines using a rh(ii)-catalyzed 1,3-dipolar cycloaddition.

Organic letters·2001

Same author

The role of factor XI in a dilute thromboplastin assay of extrinsic coagulation pathway.

Thrombosis and haemostasis·2001

Same author

Study on sludge expansion during treatment of salad oil manufacturing wastewater by yeast.

Environmental technology·2001

Same author

Transfection of the c-erbB2/neu gene upregulates the expression of sialyl Lewis X, alpha1,3-fucosyltransferase VII, and metastatic potential in a human hepatocarcinoma cell line.

European journal of biochemistry·2001

Search research articles

Related Experiment Video

Updated: Jun 19, 2026

Visualizing Protein Kinase A Activity In Head-fixed Behaving Mice Using In Vivo Two-photon Fluorescence Lifetime Imaging Microscopy

Visualizing Protein Kinase A Activity In Head-fixed Behaving Mice Using In Vivo Two-photon Fluorescence Lifetime Imaging Microscopy

Published on: June 7, 2019

Transmitted photon intensity through biological tissues within various time windows.

F Liu, K M Yoo, R R Alfano

|October 22, 2009

Summary

Early-arriving snake photons from ultrashort laser pulses decay slower than ballistic photons in biological tissue. This finding is crucial for understanding light transport in thick tissues for imaging applications.

More Related Videos

An Intra-Tissue Radiometry Microprobe for Measuring Radiance In Situ in Living Tissue

An Intra-Tissue Radiometry Microprobe for Measuring Radiance In Situ in Living Tissue

Published on: June 2, 2023

Diffuse Optical Spectroscopy for the Quantitative Assessment of Acute Ionizing Radiation Induced Skin Toxicity Using a Mouse Model

Diffuse Optical Spectroscopy for the Quantitative Assessment of Acute Ionizing Radiation Induced Skin Toxicity Using a Mouse Model

Published on: May 27, 2016

Related Experiment Videos

Last Updated: Jun 19, 2026

Visualizing Protein Kinase A Activity In Head-fixed Behaving Mice Using In Vivo Two-photon Fluorescence Lifetime Imaging Microscopy

Visualizing Protein Kinase A Activity In Head-fixed Behaving Mice Using In Vivo Two-photon Fluorescence Lifetime Imaging Microscopy

Published on: June 7, 2019

An Intra-Tissue Radiometry Microprobe for Measuring Radiance In Situ in Living Tissue

An Intra-Tissue Radiometry Microprobe for Measuring Radiance In Situ in Living Tissue

Published on: June 2, 2023

Diffuse Optical Spectroscopy for the Quantitative Assessment of Acute Ionizing Radiation Induced Skin Toxicity Using a Mouse Model

Diffuse Optical Spectroscopy for the Quantitative Assessment of Acute Ionizing Radiation Induced Skin Toxicity Using a Mouse Model

Published on: May 27, 2016

Area of Science:

Biomedical Optics
Laser Physics
Photonics

Background:

Understanding light propagation in biological tissues is vital for medical imaging and diagnostics.
Tissue scattering significantly attenuates and alters laser pulse characteristics.

Purpose of the Study:

To quantify the decay rate of early-arriving 'snake' photons in biological tissue.
To compare the decay of snake photons with ballistic photons as a function of tissue thickness.

Main Methods:

Measured the intensity of 100-fs ultrashort laser pulses transmitted through biological tissue using a streak camera.
Analyzed the early-arriving snake photon component within a defined time interval (Δt).

Main Results:

Snake photon intensity decayed exponentially with tissue thickness (z), following I(Δt) = I(0)A exp[-b(Δt)z/l(t)].
The decay rate was found to be significantly slower for snake photons compared to ballistic photons.

Conclusions:

Snake photons exhibit reduced attenuation in thicker tissues compared to ballistic photons.
This slower decay highlights the potential of utilizing snake photons for deeper tissue imaging.