Universidad Nacional Autónoma de México

Synthesis and characterization of polymer networks obtained by conventional radical and RAFT copolymerization processes in supercritical carbon dioxide

Abstract The syntheses of net ‐poly((2‐hydroxyethylene methacrylate)‐ co ‐(ethylene glycol dimethacrylate)), abbreviated as net ‐poly(HEMA‐ co ‐EGDMA), by conventional (FRP) and reversible addition‐ fragmentation chain transfer (RAFT) radical copolymerizations using supercritical...

Non-Clinical Evaluation of the Anti-PD-1 Antibody UDIZ-007

Background/Objectives: Programmed cell death protein 1 (PD-1) is a key immune checkpoint that suppresses anti-tumor T-cell responses and is an established target for cancer immunotherapy. UDIZ-007 is a fully human anti-PD-1 antibody that blocks PD-1/PD-L1 and PD-1/PD-L2 interacti...

Two‐Block Paths in Oriented Graphs of Large Semidegree

ABSTRACT We study the existence of oriented paths with two blocks in oriented graphs under semidegree conditions. A block of an oriented path is a maximal directed subpath. Given positive integers and with , we establish a semidegree function that guarantees the containment of ev...

On Sidon sets with squares, cubes and quartics in short intervals

Abstract Representative examples of our results are as follows. For any positive integer $$N$$ N the equation $$x^3+y^3=z^3+t^3, \quad x,y,z,t\in \mathbb{N}, \quad \{x,y\}\not=\{z,t\}$$ x 3 + y 3 = z 3 + t 3 , x , y , z , t ∈ N , { x , y } ≠ { z , t } has no solutions satisfying...

Within-family effect of ancestry on complex traits in a Mexican population

Abstract Human populations differ in disease prevalence and phenotypes, but the extent to which differences are caused by genetic factors is unknown for most complex traits. Comparing phenotypic means across populations is confounded by environmental differences and using polygen...

Ancient DNA preservation in the Caribbean

Abstract Ancient DNA (aDNA) analysis has transformed how we study human migration, species dispersals and environmental change, but poor preservation remains a major challenge. This is especially true in tropical settings, where hot and humid conditions accelerate DNA decay. Beca...

Premature Coronary Artery Disease, Association with Relative Blood Number of Mitochondrial DNA Copies in Mexican Population—Results of GEA Study

The mitochondrial DNA copy number (mtDNA-CN) is considered an indirect indicator of the number of mitochondria and of mitochondrial dysfunction; its decrease may indirectly reflect mitochondrial DNA (mtDNA) alterations. A reduction in mtDNA-CN is associated with the development o...

Dust Substructures and Line Perturbations driven by a Forming Planet in J16120

Abstract Hints of planet formation have been independently reported within the gap of the disc around 2MASS J16120668-301027 from millimetre continuum, infrared, and Hα observations. In this work, we present new evidence for ongoing planet formation based on Atacama Large Millime...

Soil environmental background values of potentially toxic elements in Topsoil’s from Karst environments; the case of Peninsula of Yucatan Mexico

Abstract Accurate assessment of soil contamination by potentially toxic elements requires knowledge of local background values; only in this way can false positives or negatives be avoided. The objective of this study was to define environmental background concentrations of poten...

The distribution of fitness effects of nonsynonymous mutations varies phylogenetically across animals

The distribution of fitness effects (DFE) describes the selection coefficients of newly arising mutations and fundamentally influences population genetic processes. However, the extent and mechanisms of differences in the DFE for non-synonymous mutations have not been systematica...

Redescription and First Molecular Characterization of Lernanthropus caudatus Wilson, 1922 (Copepoda: Lernanthropidae): A Comparative Integrative Analysis

The aim of this study was to redescribe and provide the first molecular characterization of the copepod Lernanthropus caudatus Wilson, 1922 (Copepoda: Lernanthropidae) collected from three sparids ( Archosargus probatocephalus , A. rhomboidalis , and Lagodon rhomboides ) from the...

Assessment of Commercially Important and Herbivorous Fish Species Ten Years After the Akumal Fishery Refuge Zone Decree

Fishing Refuge Zones (FRZs) are intended to promote the recovery of exploited populations, but their ecological outcomes can be difficult to interpret on reefs where fisheries protection coincides with persistent habitat degradation, multiple local pressures, and limited implemen...

Re-Epithelialization of Donor Sites and Meshed Skin Grafts Using Cryopreserved Cultured Cutaneous Allograft (Epifast®): Experience in Patients with Extensive Burns

Extensive full-thickness burns remain a major challenge in reconstructive surgery because limited donor-site availability frequently delays definitive wound coverage and increases the risk of infection, prolonged hospitalization, and hypertrophic scarring. Cryopreserved cultured...

DRY_NAM: A multifaceted annual drought feature dataset for the North American Monsoon region during 1960–2024 based on a daily soil water content model

The DRY_NAM dataset provides a comprehensive characterization of annual drought facets across the North American Monsoon (NAM) region from 1960 to 2024. The dataset is based on a new methodological analytical framework applied to daily soil water content time series. It includes...

Fasciocutaneous Flap Reconstruction of the Inguinal Region: A Contemporary Review of Anatomy, Indications and Technique

Reconstruction of the inguinal region remains one of the most demanding problems in reconstructive plastic surgery. Defects in this area arise after vascular reconstruction, oncological lymphadenectomy, necrotizing soft-tissue infection, burns, radiotherapy and trauma, and they f...

The Steklov Spectrum of Convex Polygonal Domains II: Investigating Spectral Determination

Abstract The extent to which the geometry of an object is determined by some associated spectral data is a longstanding problem. We investigate this problem in the context of the Steklov spectrum, focusing on convex polygons. We prove that almost all triangles are uniquely determ...

In Saccharomyces cerevisiae ΔRIB1 and ΔRIB4 mutants, riboflavin auxotrophy is reverted by Wolbachia (wStr) infection

In endosymbiosis, unicellular organisms, mostly prokaryotes, live inside the cells of a host that may be uni- or multicellular. More than half insect and arthropod species host the obligate endosymbiont Wolbachia spp., an alpha-proteobacterium that, given time, may coevolve with...

Mitogenomic and phylogenomic analyses identify a cohesive Western Atlantic lineage within the Narcine complex (Torpediniformes: Narcinidae)

Accurate species delimitation within electric rays of the genus Narcine has been hindered by overlapping morphological characters and limited molecular resolution in previous single-locus studies. This study aims to evaluate phylogenetic relationships and species boundaries withi...

On the degeneracy of solutions from stellar spectropolarimetric data

Abstract In this work we investigate the inversion accuracy of stellar magnetic fields through the analysis of spectropolarimetric data. We performed several noise-free tests to untangle the impact among the atmospheric and magnetic parameters in the data analysis. Using a single...

Mapping the nuclear environments of extreme coronal line emitting galaxies

Abstract Extreme coronal line emitters (ECLEs) are a rare class of galactic nuclei exhibiting unusually strong high-ionisation forbidden emission lines, and several ECLEs have been linked to tidal disruption events (TDEs). In this work, we compile and analyse optical spectra of 3...