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Increased susceptibility to repeated freeze-thaw cycles in Escherichia coli following long-term evolution in a benign environment
Background In order to study the dynamics of evolutionary change, 12 populations of E. coli B were serially propagated for 20,000 generations in minimal glucose medium at constant 37°C. Correlated changes in various other ...
General rules for predicting phase transitions in perovskites due to octahedral tilting
(American Physical Society, 2005-07-08)
Recent experiments on several oxide perovskites reveal that they undergo tilt phase transitions to higher-symmetry phases on increasing pressure and that dT(c)/dP < 0, contrary to a general rule previously proposed for ...