Universidad Nacional Autónoma de México

The influence of Mesoamerican obsidian mining on Technosols formation: A case study in las Navajas, Hidalgo, Mexico

Pre-Hispanic obsidian mining in Mesoamerica was one of the earliest and most widespread anthropogenic landscape modifications in the Mexican Central Highlands, yet its long-term impact on pedogenesis and Technosol formation remains poorly understood. The green‑gold obsidian depos...

Chitosan-induced permeabilization in yeast and its use for in situ enzymatic measurements

Abstract Chitosan is an oligosaccharide derived from chitin that is protonated at acidic pH to form a polycation. Its positive charge promotes interaction with negatively charged components of the yeast cell envelope, which has been associated with increased cell permeability and...

Thermal resource characterization for regional OTEC site screening in the Caribbean using AHP–TOPSIS

Ocean Thermal Energy Conversion (OTEC) offers a sustainable option for improving energy security in the hurricane-prone Caribbean region. This study established a regional screening framework for identifying offshore OTEC candidate sites based on a high-resolution (∼1 km) charact...

Pre-transplant depressive symptoms and exploratory psychosocial associations among patients with multiple myeloma who underwent autologous hematopoietic stem cell transplantation: A cross-sectional secondary analysis

Objectives To estimate the prevalence of depressive symptoms before autologous hematopoietic stem cell transplantation (HSCT) in patients with multiple myeloma, and to explore associations with clinician-documented psychosocial characteristics. Methods Single-center, cross-sectio...

Fermionic Casimir effect in an axial Lorentz-violating background

Abstract We investigate the fermionic Casimir effect for a Dirac field confined between two parallel plates with MIT bag boundary conditions in the presence of CPT-odd Lorentz symmetry violation described by a constant axial background vector $$b_{\mu }$$ b μ . The exact mode qua...

Stereolithography-fabricated polymer composites reinforced with Agave angustifolia Haw bagasse fibers and MWCNTs for PEMFC bipolar plates

The present work investigates novel composites fabricated via stereolithography (SLA) additive manufacturing, consisting of an acrylonitrile butadiene styrene (ABS)-like photopolymer matrix reinforced with Agave angustifolia Haw bagasse fibers (AFs) and multi-walled carbon nanotu...

Low-Pt Pt/NiMo-C catalysts for high-performance hydrogen evolution in anion exchange membrane water electrolysis

The development of electrocatalysts with reduced platinum-group-metal content is crucial for advancing anion exchange membrane water electrolysis (AEMWE). Here, platinum was incorporated into a carbon-supported NiMo-derived catalyst via impregnation and reductive thermal treatmen...

Phylogenetic patterns of tolerance to herbivory and underlying suite of traits: phylogenetic signal and trade-offs

When herbivory is inevitable, plants can cope with it through tolerance, buffering its negative effects on plant fitness. Macroevolutionary patterns of tolerance to herbivory may improve our understanding about its evolution. Here, we explore the phylogenetic patterns of toleranc...

Potential groundwater recharge estimates in the Yucatan Peninsula using gridded data products & parsimonious water balance models

Study region The Yucatan Peninsula (YP) and its unconfined aquifer, covering a surface of almost 150,000 km 2 and being the only terrestrial freshwater source for human activities and ecosystems. Study focus This research work aims at characterizing potential groundwater recharge...

Measurements of the production of W$$^{\pm }$$ and Z$$^0$$ bosons in pp collisions at $$\sqrt{s} = 13$$ TeV

Abstract Measurements of the production of the W $$^{\pm }$$ ± and Z $$^0$$ 0 bosons at midrapidity in pp collisions at $$\sqrt{s} = 13$$ s = 13 TeV with ALICE at the Large Hadron Collider (LHC) are presented. The W $$^{\pm }$$ ± and Z $$^0$$ 0 bosons are detected via their (di)e...

Mitochondrial Genomic Variation in Rare and Metabolic Diseases: From Heteroplasmy to Precision Medicine

Mitochondrial DNA (mtDNA) variation has traditionally been investigated in the context of human evolution and rare mitochondrial diseases; however, growing evidence suggests that it may also contribute to susceptibility to common metabolic disorders. This review integrates curren...

How and where has the climate changed?

Quantifying climate change across standardized reference periods is essential for tracking the pace and spatial structure of ongoing shifts in Earth’s climate system. However, robust and comprehensive global comparisons between consecutive climatological normals remain absent. Us...

Properties of stable massive quark stars in holography

Abstract We study a holographic D3/D7 system, whose dilaton profile has been phenomenologically adjusted in the infrared. The model is used to describe a deconfined yet massive quark phase of QCD at finite density, concluding that the equation of state of such a phase can be stif...

A note on higher coherence of graphs of groups

Abstract For n ∈ N n\in\mathbb{N} , a group is called 𝑛-coherent if every subgroup of type F n \mathsf{F}_{n} is of type F n + 1 \mathsf{F}_{n+1} . For n ≥ 1 n\geq 1 , we observe that graphs of groups with 𝑛-coherent vertex groups and virtually poly-cyclic edge groups are 𝑛-coher...

A One Health perspective on mobile genetic elements and associated antibiotic resistance genes in non-human A. baumannii

ABSTRACT Acinetobacter baumannii has become a global public health concern. Although it has traditionally been associated with hospital settings, it has also been detected in companion animals, livestock, and wildlife, as well as in food and environmental sources, particularly aq...

Dietary Patterns and the Social Development Index in Mexico City: A Machine-Learning Approach

Background: Dietary composition reflects the interplay of individual and contextual factors, yet its relationship with socioeconomic–territorial conditions remains insufficiently characterized in large Latin American cities. Methods: We identified empirical dietary patterns among...

An overview of innate cellular immune responses against hypervirulent Klebsiella pneumoniae : from evasion strategies to liver abscess formation

Hypervirulent Klebsiella pneumoniae (hvKp) has emerged as a redoubtable global pathogen, distinguished from classical K. pneumoniae (cKp) by its ability to cause life-threatening, community-acquired infections in both healthy and immunocompetent individuals. While its pathogenici...

Sensorimotor coupling underlies individual differences in speech synchronization

Behavioral auditory–motor interaction in speech reveals a striking individual difference: while some individuals readily synchronize their produced syllabic rhythm with the perceived one (high synchronizers), others show impaired synchronization (low synchronizers). The mechanism...

Metáforas de la Comunicación Organizacional en la Academia Latinoamericana: Un Diálogo Norte-Sur

Teniendo en cuenta la existencia de una episteme latinoamericana en el ámbito de la comunicación, caracterizada por un pensamiento crítico y una perspectiva subalternizada, y respondiendo a las llamadas a la descolonización de este campo, proponemos, en este ensayo, propiciar un...

Tracing source and paleoweathering conditions of the lower jurassic sandstone from sierra de santa rosa section, Northern Sonora, México

The Lower Jurassic sedimentary rocks of the Sierra de Santa Rosa Formation in northern Sonora, Mexico has been deposited in a forearc basin and its age has been assigned based on the fossil assemblages and detrital zircon U–Pb geochronology data. Neverthless, their geochemical ch...