| http://www.w3.org/ns/prov#value | - This separation medium is available from Eichrom Technologies, Inc. under the designation ABEC???, and comprises particles having a plurality of covalently bonded ???X???(CH2CH2O)n???CH2CH2R groups wherein X is O, S, NH or N???(CH2CH2O)m???R3 where m is a number having an average value of zero to about 225, n is a number having an average value of about 15 to about 225, R3 is hydrogen, C1-C2 alkyl
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