Sentence:  The DEAE-cellulose , containing 0.78 mEq of N / g , was <WSD>prepared</WSD> in our laboratory by the method of Peterson and Sober ( 7 ) from powdered cellulose , 100 - 230 mesh . 
Meaning of the word marked with <WSD> tags:  make ready or suitable or equip in advance for a particular purpose or for some use, event, etc