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Ancient deposits of weathered volcanic ash containing the special healing mud known as montmorillonite have been found on a farm 15 km east of Northampton.
To test their theory, the researchers added small particles of montmorillonite - a clay widespread in the environment.
The three investigators found that a porous clay called montmorillonite , already known to encourage the linking of nucleic acids, also has an effect on fatty acids, the building blocks of cell membranes.
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