Biomarkers.

Background: Studying brain reserve - the brain's resilience to age-related changes or damage - is crucial for understanding protective mechanisms against cognitive decline. The cerebellum may be a key region in brain reserve, but it has been historically understudied. This investigation delves into this critical area within the largest aging multi-cohort to date.

Developing Topics.

Background: Dementia has a worldwide prevalence of 55 million people, with 60 to 70% of cases attributed to Alzheimer's Disease (AD). In Antioquia, Colombia, exists a group of families with early-onset AD associated to PSEN1-E280A, a genetic variant with an autosomal dominant inheritance pattern and a penetrance over 99%, which enables the study of individuals across different disease stages. Electroencephalography (EEG) is a non-invasive, portable, and low-cost technique that allows the study of electrophysiological changes associated with neurodegeneration.

Vertex-Oriented Method for Polyhedral Reconstruction of 3D Buildings Using OpenStreetMap.

This work presents the mathematical definition and programming considerations of an efficient geometric algorithm used to add roofs to polyhedral 3D building models obtained from OpenStreetMap. The algorithm covers numerous roof shapes, including some well-defined shapes that lack an explicit reconstruction theory. These shapes include gabled, hipped, pyramidal, skillion, half-hipped, gambrel, and mansard.

Gillies ex Hooker et Arnott (Oxalidaceae): Chemical Analysis, Biological In Vitro and In Vivo Properties and Behavioral Effects.

In this work, a decoction (DOe) and a methanolic global extract (MGEOe), obtained with the aerial parts of Gillies ex Hooker et Arnott (Oxalidaceae), were evaluated. The high-resolution liquid chromatography in conjunction with electrospray ionization quadrupole time-of-flight mass spectrometry (UHPLC-ESI-QTOF-MS) analysis showed forty compounds in MGEOe and twenty-nine in DOe, including flavones, C-glycosyl flavones, isoflavones, fatty acids, terpenes, phenolic acids, and sterols. The antioxidant properties were evaluated by DPPH, TEAC, FRAP, and ILP assays.