Hydrogen storage in engineered carbon nanospaces.

It is shown how appropriately engineered nanoporous carbons provide materials for reversible hydrogen storage, based on physisorption, with exceptional storage capacities (approximately 80 g H2/kg carbon, approximately 50 g H2/liter carbon, at 50 bar and 77 K). Nanopores generate high storage capacities (a) by having high surface area to volume ratios, and (b) by hosting deep potential wells through overlapping substrate potentials from opposite pore walls, giving rise to a binding energy nearly twice the binding energy in wide pores. Experimental case studies are presented with surface areas as high as 3100 m(2) g(-1), in which 40% of all surface sites reside in pores of width approximately 0.

Impact of high pressure freezing on DH5alpha Escherichia coli and red blood cells.

The impact of high pressure and freezing on survivability of Escherichia coli and human red blood cells was evaluated to determine the utility of high-pressure transitions for preserving living cells. Based on microscopy and survivability, high pressures did not directly impact physical damage to living cells. E.