[Perforated duodenal ulcer in patient with prior gastric bypass].

Duodenal ulcer perforation in patients undergoing gastric bypass surgery is a rare late complication, occurring in less than 1% of cases. It carries a high mortality risk, particularly in cases of delayed diagnosis. The challenge lies in an unspecific clinical presentation and laboratory findings, as well as a CT scan not very helpful in almost half of cases.

Fast-moving stars around an intermediate-mass black hole in ω Centauri.

Black holes have been found over a wide range of masses, from stellar remnants with masses of 5-150 solar masses (M), to those found at the centres of galaxies with M > 10M. However, only a few debated candidate black holes exist between 150M and 10M. Determining the population of these intermediate-mass black holes is an important step towards understanding supermassive black hole formation in the early universe.

Multiple Self-Trapped Emissions in the Lead-Free Halide CsCuI.

Low-dimensional copper halides with high luminance have attracted increasing interest as heavy-metal-free light emitters. However, the optical mechanisms underpinning their excellent luminescence remain underexplored. Here, we report multiple self-trapped emissions in CsCuI.