A difference between the first conditions and the second conditions can be, for example, that the second conditions comprise {HEAD ~ a higher temperature} than {TAIL ~ the first conditions} 
than
A difference between the first conditions and the second conditions can be , for example , that the second conditions comprise { HEAD ~ a higher temperature } than { TAIL ~ the first conditions }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL