Related Experiment Video
Updated: Aug 11, 2026
07:36
High-Throughput Analysis of Optical Mapping Data Using ElectroMap
Published on: June 4, 2019
Organ mapping using parelectric spectroscopy
T Blaschke1, R Sivaramakrishnan, M Gross
1Department of Physics, Freie Universität Berlin, Berlin, Germany.
Physics in Medicine and Biology
|March 3, 2006
Summary
This study establishes baseline dielectric properties for healthy mouse organs using parelectric spectroscopy (PS). These findings are crucial for developing PS as a diagnostic tool for differentiating healthy from diseased tissues.
Area of Science:
- Biophysics
- Medical Diagnostics
- Materials Science
Background:
- Physical diagnostic methods require unambiguous mapping of tissue properties to analysis tool responses.
- Nuclear magnetic resonance (NMR) has an established atlas for tissue property mapping.
- Parelectric spectroscopy (PS) shows promise for diagnostics but lacks a comprehensive tissue property atlas.
Purpose of the Study:
- To establish baseline parelectric spectroscopy (PS) parameters for healthy mouse organs.
- To investigate the dependence of PS parameters on different healthy organ types.
- To assess the impact of formaldehyde preservation on tissue dielectric properties for future comparisons.
Main Methods:
- Measured parelectric spectroscopy (PS) parameters (dipole density Δϵ and mobility f(0)) on 12 different mouse organs.
- Acquired data 20 minutes after organ excision.
- Monitored changes in PS parameters of organs preserved in formaldehyde for over 180 minutes.
Main Results:
- Presented the dependence of dipole density (Δϵ) and mobility (f(0)) on the type of healthy mouse organs.
- Characterized the dielectric behavior of 12 distinct healthy organs.
- Quantified alterations in PS parameters due to formaldehyde preservation over time.
Conclusions:
- The study provides essential baseline data for the dipole density and mobility parameters in healthy mouse organs.
- This work contributes to building the necessary atlas for parelectric spectroscopy (PS) in tissue diagnostics.
- The data on formaldehyde-preserved tissues will facilitate future comparative studies with fresh tissues.
Related Concept Videos
01:16UV–Vis Spectroscopy: Molecular Electronic Transitions
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this process,...
01:14NMR Spectroscopy of Aromatic Compounds
Aromatic compounds can be identified or analyzed using proton NMR and carbon‐13 NMR. Typically, aromatic hydrogens or hydrogens directly bonded to the aromatic rings are strongly deshielded by the aromatic ring current. Therefore, they absorb in the range of 6.5–8.0 ppm in proton NMR spectra. For instance, aromatic hydrogens directly bonded to the benzene ring absorb at 7.3 ppm. However, aromatic hydrogens of larger rings absorb farther upfield or downfield than the ideal range. Consider...
01:14π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds
In aromatic compounds, such as benzene, the circulation of (4n + 2) π-electrons sets up a diamagnetic or diatropic ring current around the perimeter of the molecule. This current induces a magnetic field that opposes the external field inside the ring and reinforces it on the outside. The protons in benzene are deshielded and exhibit high chemical shifts in the range 6.5–8.5 ppm. The shielding effect at the center of the ring is evident in complex aromatic molecules, such as annulenes. In...
01:29UV–Vis Spectroscopy: Woodward–Fieser Rules
UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given structure by adding the contributions...
01:03¹H NMR Chemical Shift Equivalence: Homotopic and Heterotopic Protons
Protons in identical electronic environments within a molecule are chemically equivalent and have the same chemical shift. The replacement test is a useful tool to identify chemical equivalence and predict NMR spectra. A substituent replaces each of the protons being examined and the resulting molecules are compared. If the same molecule is obtained, the protons are equivalent or homotopic. Replacement of any hydrogens in ethane by chlorine yields chloroethane because all six protons are...
01:20Raman Spectroscopy: Overview
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...