Related Experiment Video
Updated: Jun 19, 2026
12:30
Electric Cell-substrate Impedance Sensing for the Quantification of Endothelial Proliferation, Barrier Function, and Motility
Published on: March 28, 2014
ELECTRIC IMPEDANCE OF SINGLE MARINE EGGS
1Department of Physiology, College of Physicians and Surgeons, Columbia University, New York, and the Marine Biological Laboratory, Woods Hole, Massachusetts.
The Journal of General Physiology
|October 30, 2009
Summary
This study used alternating current impedance to measure marine egg properties. Results show membrane capacity and internal resistance align with suspension data when membrane conductance is negligible.
Area of Science:
- Marine Biology
- Biophysics
- Cellular Electrophysiology
Background:
- Understanding cellular properties is crucial for marine biology.
- Impedance measurements offer a non-invasive method to study cell membranes.
Purpose of the Study:
- To measure the electrical properties of single marine eggs using alternating current impedance.
- To compare impedance data from single eggs with data from egg suspensions.
Main Methods:
- Alternating current impedance measurements were performed on single marine eggs.
- Eggs were placed in a capillary tube with electrodes in seawater.
- Measurements spanned a frequency range from 1 to 2500 kHz.
Main Results:
- Membrane capacity and internal resistance of Arbacia eggs were determined.
- Data from single unfertilized and fertilized Arbacia eggs agreed with suspension data.
- Preliminary data for Cumingia and Chaetopterus eggs were also collected.
Conclusions:
- Single egg impedance measurements provide reliable estimates of membrane capacity and internal resistance.
- The method is applicable to various marine egg species.
- Further research can explore membrane conductance effects.
