Particle Sorting by Repeated Freezing and Thawing

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Science  25 Oct 1963:
Vol. 142, Issue 3591, pp. 499-501
DOI: 10.1126/science.142.3591.499


If a hetrogeneous mixture of particles of various sizes is frozen and thawed repeatedly, the particles are sorted into relatively uniformn groups by size. The movement of particles depends on the amount of water between the ice-water interface and the particle, the rate of freezing, the distribution of the particles by size, and the orientation of the freeze-thaw plane.