At {HEAD ~ a water loading} above {TAIL ~ about 11%}, the reactivity and HCl capacity began to decrease, indicating the critical range over which this surprising advantage results 
above
At { HEAD ~ a water loading } above { TAIL ~ about 11 % } , the reactivity and HCl capacity began to decrease , indicating the critical range over which this surprising advantage results
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 OTH