There have been two new advances in molecular thermodynamic models of
hydrophobic effects. One is an information theory model for predicting
free energies of hydrophobic hydration and hydrophobic interactions b
ased on an analysis of density fluctuations in pure liquid water. The
second involves the use of proximity approximations to predict water s
tructure around hydrophobic or moderately amphiphilic molecular solute
s of arbitrary size and shape. Recently, computer simulation studies o
f the effect of pressure on water structure and hydrophobic interactio
ns have also been carried out.