Higher temperatures are less preferred because they may lead to {HEAD ~ undesirable reactions} such as carbon loss through reaction with {TAIL ~ oxygen} 
Higher temperatures are less preferred because they may lead to { HEAD ~ undesirable reactions } such as carbon loss through reaction with { TAIL ~ oxygen }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL