This is generally accomplished by use of grinding mill used to produce the particle size of {HEAD ~ about 50 nm} to {TAIL ~ 300 nm}, preferably to less than about 200 nm, and more preferably to less than about 140 nm 
This is generally accomplished by use of grinding mill used to produce the particle size of { HEAD ~ about 50 nm } to { TAIL ~ 300 nm } , preferably to less than about 200 nm , and more preferably to less than about 140 nm
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH