Structure and stability of BaTiSi₂O₇.

Due to their optical, photo-luminescence (PL), and afterglow properties, barium titanosilicates are compounds of great interest for functional materials and light-emitting devices. Among them, BaTiSi2O7 (BTS2) is certainly one of the most intriguing; it displays peculiar properties (e.g.

[Prosthetic separation in the retroperitoneum in reconstructive arterial surgery].

In this assay we take into consideration 3410 retroperitoneal prosthetic reconstructions in aorto-iliac pathology performed in the last 25 years at the General and Cardiovascular Institute of Milan. Thirty-nine retroperitoneal prosthetic dehiscences were observed; 35 of them had been subjected to their first operation in our Institute (1.03%).

[Acute occlusion of the abdominal aorta].

Acute aortic occlusion is a rare event, usually related to atherosclerotic lesions, cardiac embolism or traumatic events. During the last twelve years, we observed 25 acute aortic occlusions: 12 patients (48%) were affected by aortic bifurcation embolism, and 13 patients (52%) by acute aortic thrombosis. There were 18 men (72%) and 7 women (28%) with a median age of 63 years.