Related Experiment Videos
Thermal diffusion as a mechanism for biological transport
Zeitschrift Fur Naturforschung. Section C, Biosciences
|June 1, 1984
Summary
Thermal diffusion may play a significant role in mass transport within living tissues. This process is particularly important for transport across ensembles of cells, such as organs or tumors.
Area of Science:
- Biophysics
- Cell Biology
- Physical Chemistry
Background:
- Mass transport is crucial for biological functions.
- Conventional diffusion (Fickian) is well-understood but may not explain all transport phenomena.
- Thermal gradients exist in biological systems.
Purpose of the Study:
- To assess the significance of thermal diffusion in biological mass transport.
- To estimate thermal gradients across biological structures.
- To explore the conditions under which thermal diffusion becomes important.
Main Methods:
- Utilized accumulated experimental data.
- Performed model calculations to estimate thermal gradients.
- Analyzed thermal diffusion in relation to Fickian diffusion.
Main Results:
- Substantial thermal gradients can exist across biological membranes.
- Thermal diffusion becomes significant when Fickian diffusion is suppressed (e.g., near critical points).
- Thermal diffusion is more impactful for cell ensembles than single cells.
Conclusions:
- Thermal diffusion is a plausible mechanism for active transport in biological systems.
- Mass transport via thermal diffusion can be substantial in organs and tumors.
- Further investigation into thermal diffusion's role in vivo is warranted.