Related Experiment Video
Updated: Jun 23, 2026
12:49
Measurement of Aggregate Cohesion by Tissue Surface Tensiometry
Published on: April 8, 2011
Tissue surface tension measurement by rigorous axisymmetric drop shape analysis
Robert David1, Hiromasa Ninomiya, Rudolf Winklbauer
1Department of Cell & Systems Biology, University of Toronto, 25 Harbord Street, Toronto, ON, Canada, M5S 3G5. robertd@mie.utoronto.ca
Colloids and Surfaces. B, Biointerfaces
|May 16, 2009
Summary
Researchers measured embryonic cell surface tension using a modified drop shape analysis (ADSA) technique. This method accurately quanties surface tension in flattened cell aggregates, advancing biophysical modeling of early development.
Area of Science:
- Developmental Biology
- Biophysics
- Cellular Mechanics
Background:
- Embryonic cell aggregate behavior can be modeled using tissue surface tension, analogous to liquid molecules.
- Centrifugation can flatten aggregates, enabling surface tension measurements via drop shape analysis methods.
Purpose of the Study:
- To apply and validate the axisymmetric drop shape analysis (ADSA) method for measuring tissue surface tension in flattened embryonic cell aggregates.
- To compare the efficacy of a modified ADSA approach with a previous version (ADSA-IP) for analyzing irregular aggregate profiles.
Main Methods:
- Studied ectodermal embryonic cells from Xenopus laevis.
- Subjected cell aggregates to centrifugation at 100 x g and 200 x g.
- Applied axisymmetric drop shape analysis (ADSA) to measure tissue surface tension from aggregate profiles.
Main Results:
- Demonstrated that ADSA can be successfully applied to irregular aggregate profiles.
- Observed that modified experimental methods and ADSA algorithms yield similar results to ADSA-IP.
- Found that aggregate profiles more closely conform to Laplacian curves with the modified method.
Conclusions:
- The modified ADSA technique provides a reliable method for quantifying tissue surface tension in flattened embryonic cell aggregates.
- The ADSA fitting error offers a means to estimate the relative uncertainty in surface tension measurements.
- This approach enhances the biophysical modeling of embryonic cell behaviors and early development.
Related Concept Videos
01:22Surface Tension of Fluid
Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
Surface tension varies with...
Surface tension varies with...
01:24Surface Tension
Surface tension is defined as the force per unit length (γ) acting along the surface of a liquid. It arises due to strong intermolecular forces of attraction. A molecule located inside the bulk of the liquid is surrounded by other molecules and experiences equal forces in all directions. However, a molecule at the surface experiences unbalanced forces because there are more neighboring molecules below than above. This creates a net inward force that pulls surface molecules toward the interior,...
02:57Surface Tension, Capillary Action, and Viscosity
Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
01:15Thin-Walled Hollow Shafts
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution of...