Dynamic Lone Pairs and Fluoride-Ion Disorder in Cubic-BaSnF.

Introducing compositional or structural disorder within crystalline solid electrolytes is a common strategy for increasing their ionic conductivity. (M,Sn)F fluorites have previously been proposed to exhibit two forms of disorder within their cationic host frameworks: occupational disorder from randomly distributed M and Sn cations and orientational disorder from Sn(II) stereoactive lone pairs. Here, we characterize the structure and fluoride-ion dynamics of cubic BaSnF, using a combination of experimental and computational techniques.

Good efficiency of intrauterine insemination programme for serodiscordant couples with HIV-1 infected male partner: a retrospective comparative study.

Objective: Assisted reproduction techniques can minimize the risk of HIV female contamination when the male partner is HIV-infected. The aim of this study was to investigate the efficiency of sperm washing and intrauterine insemination (IUI) in these couples.

Study Design: Retrospective comparative study.

[Amelanotic malignant melanoma: about three cases].

The amelanotic melanoma is a rare type of malignant melanoma. The purpose of this report is to point out this aspect of melanoma, whose diagnostic delay is frequent. We describe one localisation on the penis, rare in this kind of melanoma and two cases of the extremities, more frequent localization of the amelanotic melanoma.