The tester 25, wherein said liquid crystal is selected from {HEAD ~ the group} consisting of cholestery chloride, cholesteryl oleyl carbonate, cholesteryl bromide, cholesteryl acetate, {TAIL ~ cholesteryl nanoate}, cholestery oleate and cholesteryl caprylate 
consisting of
The tester 25 , wherein said liquid crystal is selected from { HEAD ~ the group } consisting of cholestery chloride , cholesteryl oleyl carbonate , cholesteryl bromide , cholesteryl acetate , { TAIL ~ cholesteryl nanoate } , cholestery oleate and cholesteryl caprylate
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH