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Rem, P.C. (author), Berkhout, S.P.M. (author), De Koning, J.R.A. (author)A method for separating seeds of different densities in a process stream, wherein the seeds are introduced into a magnetic process fluid for the formation of the process stream, which process stream is subjected to a magnetic field for the realization of a density stratification in the process stream, such that the individual seeds in the...patent 2009