Universidad Mayor

Trophic position structures physiological trade-offs between metabolic and detoxification pathways in sympatric passerines

Abstract Resource use links ecological context to organismal performance, yet whether dietary breadth or trophic position is more closely associated with physiological state in wild birds remains unclear. We used a natural trophic gradient in a sympatric passerine assemblage to t...

Isidora Aguirre and Her Aesthetic Flow in Chilean Theatre during the Second Half of the 1960s

Presentation slides from the keynote talk “Isidora Aguirre and Her Aesthetic Flow in Chilean Theatre during the Second Half of the 1960s”, presented by Cristian A. Aravena at the DraCor hackathon “Women Playwrights in Digital Corpora” in Rostock on 7 September 2026. All images us...

Association between muscle quality index and time to stand up from the prone position in community-dwelling older adults

Both muscle strength and muscle quality are essential factors for preserving autonomy and functionality in older adults (OA). However, the relationship between muscle quality index (MQI) and the time to stand up from the prone position (SPP) in this population is unknown. The pri...

Maximum entropy modeling of spin-glass behavior in random lasers

We investigate random-laser (RL) emission fluctuations using a Maximum Entropy (MaxEnt) framework. Experimental spectra across pump powers are binarized into spin-like variables, and a MaxEnt model is inferred from single-wavelength magnetizations and pairwise correlations. The r...

Unimodular gravity with arbitrary diffusion function: a dynamical system reconstruction approach

Abstract We investigate cosmological diffusion models in unimodular gravity within a dynamical systems reconstruction framework. By treating the logarithmic slope of the diffusion sector as an invertible dynamical variable, the diffusion function can be systematically reconstruct...

Cardiometabolic multimorbidity phenotypes and their associations with functional and cognitive outcomes in older Chilean adults: findings from the Chilean national health survey

Abstract Background Multimorbidity is highly prevalent among older adults and is associated with functional decline, disability, cognitive impairment, and increased healthcare burden. However, traditional disease-count approaches may fail to capture the heterogeneity of multimorb...

Horizontal mitochondrial transfer and mitochondrial transplantation in skin: protection against UVR-induced ROS damage and enhancement of cell proliferation and wound healing

Skin homeostasis, protection against ultraviolet radiation (UVR), and wound repair depend on coordinated interactions among melanocytes, keratinocytes, and fibroblasts. Horizontal mitochondrial transfer (HMT) is a naturally occurring form of intercellular communication in which m...

Treatment of Greywater with Emerging Contaminants Using Hollow Fiber Membrane Bioreactor

Greywater reuse has emerged as a promising strategy to reduce pressure on freshwater resources, but little is known about the impact that emerging contaminants may have on its safe application. This study evaluated the performance of hollow fiber membrane bioreactors (HFMBs) for...

Social Class, Social Resources, and Caregiver Burden: A Multiple Serial Mediation in Unpaid Informal Female Caregivers of Older Relatives in Santiago, Chile

This research explored the role of social class as a determinant of the caregiver burden, and the mediating of social resources (perceived and actual). Using a sample of women aged 35 to 65 years who are unpaid caregivers for older relatives in Santiago, Chile, conducting a seria...

Tissue flow acts as a guidance cue for immune cell polarization and directional migration

Abstract Embryonic myeloid (EM) cells are the first immune-cell population to emerge during development and must disperse throughout the embryo to act as the first line of defence against infection. Although EM cells migrate directionally toward wounds, how they navigate through...

Portable Paper-Based Colorimetric Biosensor for Rapid Screening of Organophosphate Exposure via Acetylcholinesterase Activity and RGB Image Analysis

Background: Rapid screening of acetylcholinesterase (AChE) inhibition is essential for monitoring exposure to organophosphate compounds, particularly in field settings where access to laboratory infrastructure is limited. This study aimed to develop a portable paper-based colorim...

Implementing digital health transformation policies in Latin America: insights from four national case studies

Abstract Digital health transformation (DHT) policies can improve the performance of health systems. However, there are few empirical studies on how these policies are implemented in practice. This article examines four national cases of implementing DHT policies in the Latin Ame...

Molecular overview of major salivary gland carcinomas in chilean patients: 2 case reports

Abstract Background Salivary gland tumors (SGTs) are rare neoplasms that account for 8.5 % of head and neck cancers and comprise a highly heterogeneous group of benign and malignant subtypes, according to the World Health Organization. In Chile, epidemiological and molecular data...

Functional partitioning among core and peripheral bacteria shapes the giant kelp holobiont

The giant kelp Macrocystis pyrifera hosts diverse microbial communities integral to its ecological function, yet the distribution of microbial functions across different holobionts remains poorly resolved. Here, we used genome-resolved metagenomics to examine how microbial occupa...