After centrifuging {HEAD ~ the supernatant liquid} from {TAIL ~ the precipitation}, the precipitation is washed with a diluted aqueous solution of alcohol, usually ethanol, with such a concentration that the precipitation is not dissolved 
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After centrifuging { HEAD ~ the supernatant liquid } from { TAIL ~ the precipitation } , the precipitation is washed with a diluted aqueous solution of alcohol , usually ethanol , with such a concentration that the precipitation is not dissolved
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH