Sentence:  Abelson and Rawson , <WSD>using</WSD> a stepwise elution scheme , fractionated whole sera containing ABO and Rh antibodies on diethylaminoethyl DEAE cellulose and carboxymethyl cellulose . 
Meaning of the word marked with <WSD> tags:  put into service; make work or employ for a particular purpose or for its inherent or natural purpose