We report here on an experimental study of slow thermal relaxation effects from the metastable metallicferromagnetic phase to the insulating one in a charge-ordered manganese oxide, Pr 0.67 Ca 0.33 MnO 3 . The metalinsulator transition is evidenced by an abrupt jump of the resistivity by several orders of magnitude at a well-defined time while there is no apparent singularity in the magnetization relaxation. This supports the view of a percolative behavior of current transport. The magnetic relaxation is discussed in terms of a two-level phenomenological model with a distribution of energy barriers.

We report the first study of CNV analysis in a large cohort of Caucasian POF patients. In the eight statistically significant CNVs we report, we found five genes involved in reproduction, thus representing potential candidate genes in POF. The current study along with emerging information regarding CNVs, as well as data on their potential association with human diseases, emphasizes the importance of assessing CNVs in cohorts of POF women.

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