This study explores the mechanochromic behavior of dinuclear aluminum-based triple-stranded helicates with various halogenated substituents. Mechanical grinding induces distinct color changes, with powder X-ray diffraction confirming phase transitions between crystalline and amorphous states. In the crystalline phase, the helicates adopt a more twisted conformation that limits pi-conjugation, producing monomeric yellow emission. In contrast, in the amorphous phase, this twist relaxes and the pi-conjugated system is extended, yielding orange emission. The original emission properties can be restored through solvent treatment, demonstrating the reversible nature of this mechanochromic behavior. These results demonstrate a mechanochromic mechanism governed by reversible torsion-angle changes and highlight aluminum-based helicates as promising responsive luminescent materials.
: Revision total hip arthroplasty (THA) for acetabular bone loss is challenging. The modified Kerboull-type (KT) plate has been adopted; nonetheless, mid- to long-term clinical outcomes remain poorly understood. We evaluated survival rates and radiographic outcomes of acetabular reconstruction using the KT plate and investigated risk factors for plate breakage or re-revision. We retrospectively included 120 patients (130 hips) who underwent acetabular reconstruction using the KT plate (1997–2024) and evaluated perioperative outcomes, Harris Hip Score (HHS), survival rates, and key radiographic parameters. Mean age at surgery and follow-up duration were 69.0 ± 10.4 years and 107.4 ± 71.7 months, respectively. Mean blood loss and operative time were 630.2 mL and 284.3 min, respectively. HHS improved from 56.2 to 86.4. Fractures (5.3
Behavioral differences during and before/after dispersal were identified in two male raccoons (Procyon lotor) fitted using global positioning system (GPS) collars in Oita Prefecture, Japan. One male raccoon dispersed in a yearling spring, whereas the other dispersed in a yearling winter. The timing and direction of dispersal might reflect raccoon density in terms of differences in harvest pressure between municipalities in Oita. In both individuals, the average travel speed increased, and subsequently, the average travel distance per day rose during dispersal compared with periods before/after dispersal. During dispersal, forest use decreased, whereas artificial and agricultural land use increased in one individual, suggesting that this individual preferred anthropogenic areas for dispersal.
Intra-aortic balloon occlusion (IABO) is used to control pelvic hemorrhage and has recently been adapted to elective surgery to limit intraoperative blood loss. Its role in acetabular fracture fixation, particularly via anterior approaches, remains unclear. This study evaluated whether prophylactic percutaneous IABO is associated with reduced blood loss during anterior open reduction and internal fixation (ORIF) of acetabular fractures, using propensity score matching (PSM) to minimize selection bias. We conducted a retrospective cohort study including 80 consecutive adult patients who underwent anterior ORIF for acetabular fractures between 2013 and 2024. Twenty-four patients received prophylactic percutaneous IABO, and 56 served as controls. One-to-one PSM (caliper 0.2 SD of the logit) was performed on demographics, fracture characteristics, and surgical factors, yielding 20 matched pairs. Outcomes included intraoperative blood loss (IBL; primary), total blood loss (TBL; gross formula), operative time, transfusion, reduction quality, perioperative complications, and IABO-related parameters. IABO was associated with significantly lower blood loss both before and after matching. In matched pairs, median IBL was 525 g versus 1070 g in controls (p = 0.004), representing a 51
