In {HEAD ~ certain preferred embodiments}, the molar ration of K:A is in {TAIL ~ the range} of 1:1.5 to 1:15 
In { HEAD ~ certain preferred embodiments } , the molar ration of K : A is in { TAIL ~ the range } of 1:1.5 to 1:15
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH