Atropisomerism is a type of stereoisomerism that results from severely hindered rotation around a single bond. If the barrier to rotation is sufficiently high then the two atropisomers will be stable ...

On St. Catherines Island, Georgia, the barrier beach is retreating rapidly landward, burying living salt marsh as it moves and later exhuming it on the ocean side. Two methods were used to reconstruct ...

This is a preview. Log in through your library . Abstract The aspartic acid in human tooth enamel shows increasing racemization with age. This increase is not seen in the metabolically active protein ...