A Test of the Particle Paradigm in N-Body Simulations

We present results of tests of the evolution of small ``fluid elements'' in cosmological N--body simulations, to examine the validity of their treatment as particles. We find that even very small elements typically collapse along one axis while expanding along another, often to twice or more their initial comoving diameter. This represents a possible problem for high--resolution uses of such simulations.Comment: Uses aasms4.sty; accepted for publication in ApJ Letters. Files available also at ftp://kusmos.phsx.ukans.edu/preprints/ates

Synthesis and structure of a molecular barium aminebis(phenolate) and its application as an initiator for ring-opening polymerization of cyclic esters

The synthesis and structural characterization of an unusual trinuclear barium aminebis(phenolate) complex are reported along with its application as an initiator for the ring-opening polymerization of epsilon-caprolactone and L-lactide