At {TAIL ~ the same time}, {HEAD ~ the applied field} induces magnetization in a ferromagnetic collection structure, thereby adding a second, internal gradient which further acts upon the magnetically responsive particles to move them into defined region of the collection vessel for analysis 
At { TAIL ~ the same time } , { HEAD ~ the applied field } induces magnetization in a ferromagnetic collection structure , thereby adding a second , internal gradient which further acts upon the magnetically responsive particles to move them into defined region of the collection vessel for analysis
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH