Subsequently, and while maintaining {HEAD ~ the supercritical state} of {TAIL ~ the supercritical fluid}, the conditions within the reaction chamber are changed to the conditions under which the precursor is relatively reactive 
of
Subsequently , and while maintaining { HEAD ~ the supercritical state } of { TAIL ~ the supercritical fluid } , the conditions within the reaction chamber are changed to the conditions under which the precursor is relatively reactive
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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