Universidad Nacional Autónoma de México

Discrete wave dynamics in vibrating membranes: A cellular automaton approach

We introduce a two-dimensional cellular automaton (CA) framework in which wave-like membrane dynamics emerge from purely local, discrete interactions. The model evolves second-order local rules with explicit velocity, acceleration, and optional damping, combined with an asynchron...

Earliest simultaneous multi-color optical observations of GRB 230328B: from 41 seconds to the host-galaxy identification

Abstract We present a multiwavelength study of the long-duration gamma-ray burst GRB 230328B, combining prompt γ-ray observations with exceptionally early simultaneous optical photometry and extensive X-ray, radio, and host-galaxy follow-up. NUTTELA-TAO began simultaneous g′r′i′...

Sleep Wellness Education: A Museum-University joint forces project

Abstract Most educational interventions available primarily target parents and caregivers. Early childhood represents a crucial period of rapid cognitive development, during which play activities enhance brain structure and function, thereby promoting executive functions. Through...

A systematic review of the effects of vanadium exposure on the health of human populations

BACKGROUND: Vanadium is a metal naturally occurring in various ecosystems. Both natural and anthropogenic sources contribute to high concentrations in the air, soil, and water. Several experimental and epidemiological studies have linked this exposure to multiple adverse health e...

Maternal Dietary B-Complex Vitamin Pattern and Risk of Complex Congenital Heart Defects in a Mexican Population

Background/Objectives: Congenital heart defects (CHDs) are among the most common congenital anomalies worldwide, and maternal nutrition during early pregnancy may influence their development. Although previous studies have mainly evaluated individual B-complex vitamins, the contr...

Plasmonic Studies Using Self-Assembled Metallic Nanostructures Deposited on a Lithographically Patterned Substrate

Self-assembled artificial nanostructures, such as DNA origami, have attracted interest as templates for the placement of inorganic materials because their design enables the incorporation of binding sites for attaching nanocomponents with nanometer-scale precision. In this work,...

Tinea capitis in the Americas: Epidemiological Trends and Etiological Distribution from a Systematic Review

Background: Tinea capitis remains one of the most common superficial fungal infections in children worldwide and represents an important public health concern due to its high prevalence, potential complications, and changing epidemiology. This study aimed to characterize the epid...

Population Structure, Fecundity, and Reproductive Patterns of Erichsonella attenuata (Isopoda: Valvifera: Idoteidae) in Tamiahua Lagoon, Veracruz, Mexico

Erichsonella attenuata is a free-living marine isopod distributed across the Gulf of Mexico; however, quantitative information on its population structure and reproductive biology remains limited. We examined 2315 individuals collected in Tamiahua Lagoon, Veracruz, Mexico, to des...

Energetic insights into alendronate–β-cyclodextrin complexation

Abstract Bisphosphonates are widely used for the treatment of bone-related disorders; however, their low bioavailability limits therapeutic efficacy and increases long-term adverse effects. This study investigated the thermal behavior and binding energetics of the alendronate (AL...

Systematic review and exploratory spatial analysis of bat trypanosomatid infections in Mexico

Abstract Introduction Trypanosoma spp. and Leishmania spp. are protozoan parasites of public health importance. Bats can act as hosts, but evidence from Mexico remains fragmented and has rarely been examined within a One Health spatial framework. The Maya Train and the Interocean...

Local capacity building and policy evaluation in climate and environmental governance

Identifying challenges and opportunities to enable and accelerate urban transformational solutions is increasingly urgent, particularly as the world becomes more urbanized and approaches an environmental overshoot scenario. This paper focuses on the role of local capacities in cl...

GRB 260310A / SN 2026fgk: A Multi-Wavelength Study of a Nearby Underluminous Long GRB and SN with a Complex Afterglow

Abstract We present a comprehensive multi-wavelength study of GRB 260310A / SN 2026fgk, a nearby (z = 0.153), long-duration gamma-ray burst (GRB) with an exceptionally underluminous prompt γ-ray emission and a Comptonized spectrum. The burst occurred at the edge of a blue host ga...

Finite Element Analysis of Stress Distribution in Healthy and Restored Mandibular Molars with Zirconia and Lithium Disilicate Crowns Under Vertical and Oblique Loading

The mechanical compatibility between dental restorative materials and the natural tooth structure is a relevant factor for long-term clinical performance. Although zirconia (yttria-stabilized tetragonal zirconia polycrystal, Y-TZP) and lithium disilicate are widely used for full-...

Socioecological Trade-offs in the Yucatan Peninsula: Stakeholder Perceptions of How Urban and Tourism Development Reshape Nature’s Contributions to People

Tourism expansion and urban development in the Yucatan Peninsula have intensified pressures on ecosystems, altering the natural contributions to people (NCP) that sustain regional wellbeing. To better understand emerging socioecological conflicts, we applied a multi-criteria anal...

Ser715 PhosphorylationInduces β-HairpinUnfolding and Destabilization of FOXM1 Autoinhibition

Abstract FOXM1 is a cell proliferation-driving transcription factor activated by phosphorylation-induced conformational changes. In its inactive state, an intramolecular β-hairpin within the transactivation domain (TAD) binds the N-terminal repressor domain (NRD), forming a compo...

A geometric algebra approach to coincidence site lattices

Abstract When a lattice in Rn is superimposed on a rotated copy with coincident origins, coincidence points may arise for specific rotations, forming a coincidence site lattice (CSL). In crystallography, particularly in two and three dimensions, CSL theory is fundamental for desc...

Thromboxane A2-Driven Vascular Hyperreactivity in Cadmium-Induced Hypertension: Role of Oxidative Stress and Therapeutic Implications

Background/Objectives: Environmental factors, including heavy metals such as cadmium, are increasingly recognized as important contributors to hypertension beyond traditional risk factors. To date, the role of angiotensin and alpha-adrenergic receptors in hypertension induced by...

Genomic catalogue of giant viruses reveals expanded diversity and functional potential

Nucleocytoplasmic large DNA and Mirusviricota viruses exhibit taxonomic richness which continually expands due to metagenomic sequencing. Here we curate a database of giant virus metagenome-assembled genomes (GVMAGs V2), comprising 8,508 species-level representatives from 18,727...

Stereoselectivity inLiquid Aerosols through Acid-MediatedEpoxide Ring-Opening Reactions

Abstract Stereoisomers in aqueous atmospheric aerosols are assumed to be present in equal concentrations, as aerosols are most commonly mixtures of simple inorganic salts with a range of organic species that lack obvious pathways to induce stereoselectivity. Further, since submic...

Trace-element enrichment in agricultural soils under wastewater-influenced surface-water irrigation: a plot-scale study in an Andean micro-watershed

Abstract The use of wastewater-influenced surface waters for agricultural irrigation is common in many regions, yet its implications for soil geochemistry remain insufficiently characterized, particularly in Andean micro-watersheds. This study evaluates the occurrence and distrib...