The method 9 wherein said optically active metal ion is incorporated into said {TAIL ~ bead} by coprecipitation during {HEAD ~ said sol gel process} 
The method 9 wherein said optically active metal ion is incorporated into said { TAIL ~ bead } by coprecipitation during { HEAD ~ said sol gel process }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD