Body centered structures are used as seeds for a variety of structures of rank 3 and higher. Propellane based structures are introduced and their design and topological properties are detailed.

In this article, we describe all the hyperbolic 24-cell 4-manifolds with exactly one cusp. There are four of these manifolds up to isometry. These first examples one-cusped minimum volume.

We present a construction for tiling the 24-cell with congruent copies of a single Hamiltonian cycle, using the algebra of quaternions. http://dx.doi.org/10.4169/amer.math.monthly.119.10.872 MSC: Primary 00A08, Secondary 05C45; 51M20 872 c © THE MATHEMATICAL ASSOCIATION OF AMERICA [Monthly 119 This content downloaded from 195.187.72.155 on Wed, 19 Feb 2014 05:45:28 AM All use subject to JSTOR T...

0

The aim of this study was to evaluate and compare the cytotoxicity induced by two resin-based sealers, 2Seal and AH Plus, in two osteoblast-like cell lines, MG-63 and Saos-2. Using sterile discs of both sealers in complete media, 24- and 72-h extracts were prepared. The extracts were exchanged with Saos-2 or MG-63 cell culture media at 75% confluence, and after 24 h incubation, cell viability t...

the aim of this study was to evaluate and compare the cytotoxicity induced by two resin-based sealers, 2seal and ah plus, in two osteoblast-like cell lines, mg-63 and saos-2. using sterile discs of both sealers in complete media, 24- and 72-h extracts were prepared. the extracts were exchanged with saos-2 or mg-63 cell culture media at 75% confluence, and after 24 h incubation, cell viability t...