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<DIV><FONT face=Arial size=2>Dear colleagues,</FONT></DIV>
<DIV><FONT face=Arial size=2> ( a tip !) in case of fast sedimenting
particles in aqueous solution , it is possible to
exchange (partly) the water with D<FONT size=1>2</FONT>O ,
so ( depending on the Vbar of the
particle) the apperent s' and m will be reduced
<DIV><FONT face=Arial size=2>and can be recalculated to water when when
the k faktor D<FONT size=1>2</FONT>O/H<FONT size=1>2</FONT>O is respected. Due
to hydration of the
<DIV><FONT face=Arial size=2>particle adding sucrose or salt to rise
the solvent density should be avoided.</FONT></DIV>
<DIV>Under 2000 rpm hard to avoid the processing of the rotor. meniscii
become broader.</DIV>
<DIV>
ariel</DIV></FONT></DIV></FONT></DIV></BODY></HTML>