Alternatively, {TAIL ~ the GO solution} can be just boiled for an extended period of {HEAD ~ time} to precipitate out the partially reduced GO 
Alternatively , { TAIL ~ the GO solution } can be just boiled for an extended period of { HEAD ~ time } to precipitate out the partially reduced GO
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH