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Related Experiment Video

Updated: Jun 19, 2026

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Published on: April 12, 2019

BEHAVIOR OF WATER IN CERTAIN HETEROGENEOUS SYSTEMS.

W J Osterhout¹, J W Murray

¹Laboratories of The Rockefeller Institute for Medical Research.

The Journal of General Physiology

|October 30, 2009

Summary

This study introduces "anaphoresis," a phenomenon where substances like trichloroacetic acid can move water across cell-like models. This finding may explain water movement in living organisms and kidney function.

Area of Science:

Biophysics
Physical Chemistry
Cell Biology

Background:

Guaiacol-based models mimic cell protoplasm, exhibiting unique water behavior.
Understanding these model systems may clarify water relations in living organisms.

Purpose of the Study:

To investigate the interaction of trichloroacetic acid (TCA) and acetone with water-guaiacol systems.
To explore the phenomenon of solute-driven water movement in these artificial cell models.
To propose a new term, 'anaphoresis,' for observed diffusion behaviors.

Main Methods:

Utilized two-phase systems of water and guaiacol, with additions of TCA or acetone.
Measured changes in mole fraction and activity of water and guaiacol.
Conducted diffusion experiments with layered solutions and observed water movement.

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Published on: August 23, 2018

Main Results:

TCA and acetone increase the mutual solubility of water and guaiacol, causing phase fusion.
Solutes like TCA can drive water movement, with activity gradients opposing concentration gradients.
Observed phenomena, termed 'anaphoresis,' differ from traditional anomalous osmosis.

Conclusions:

Anaphoresis, the solute-facilitated water transport, may occur in living cells, impacting water relations.
The findings offer insights into cellular permeability and water transport mechanisms.
Circular water pathways observed in models resemble kidney tubule function.