8,172 results match your criteria: "Universidad Nacional de Córdoba- Ciudad Universitaria[Affiliation]"

The role of phenotypic modularity in the evolution of skull morphology in birds has been a subject of debate in recent years. Furnariids (ovenbirds and woodcreepers), a spectacular avian adaptive radiation, are distinguished in their cranial morphology as the only passerines with two types of cranial kinesis, constituting a great model to test whether the evolution of novelties linked to kinesis was associated with shifts in patterns of evolutionary modularity and allometry in the avian skull. Our analyses by means of geometric morphometric tools and phylogenetic comparative methods show that the beak and neurocranium of furnariids evolved in a modular fashion and shaped by the cranial kinesis evolution.

View Article and Find Full Text PDF

Graphene oxide scaffolds promote functional improvements mediated by scaffold-invading axons in thoracic transected rats.

Bioact Mater

May 2025

Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Calle Sor Juana Inés de la Cruz 3, 28049, Madrid, Spain.

Millions of patients and their caretakers live and deal with the devastating consequences of spinal cord injury (SCI) worldwide. Despite outstanding advances in the field to both understand and tackle these pathologies, a cure for SCI patients, with their peculiar characteristics, is still a mirage. One of the most promising therapeutic strategies to date for these patients involves the use of epidural electrical stimulation.

View Article and Find Full Text PDF

Effect of Ultrasound Treatment on Structural and Physical Properties of Native Maize Starch.

Plant Foods Hum Nutr

January 2025

Instituto de Ciencia y Tecnología de Alimentos Córdoba (ICYTAC) - CONICET-UNC, Av. Juan Filloy S/N, Ciudad Universitaria, Córdoba, Argentina.

The focus of this work was to evaluate the differences between the thermal and mechanical effects generated by ultrasound waves on the properties of corn starch, which facilitate the subsequent enzymatic hydrolysis for the generation of porous starches. The results showed that both the thermal and mechanical effects have the capacity to disorganize/alter the structure of starch, impacting on its properties. Characteristics such as particle size, pasting and thermal properties (peak viscosity 1400-1800 cp.

View Article and Find Full Text PDF

Targeting CRM1 for Progeria Syndrome Therapy.

Aging Cell

January 2025

Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados, Ciudad de México, Mexico.

Hutchinson-Gilford progeria syndrome (HGPS) is a premature aging disease caused by progerin, a mutant variant of lamin A. Progerin anchors aberrantly to the nuclear envelope disrupting a plethora of cellular processes, which in turn elicits senescence. We previously showed that the chromosomal region maintenance 1 (CRM1)-driven nuclear export pathway is abnormally enhanced in patient-derived fibroblasts, due to overexpression of CRM1.

View Article and Find Full Text PDF

A Recursive Model Approach to Include Epigenetic Effects in Genetic Evaluations Using Simulated DNA Methylation Effects.

J Anim Breed Genet

January 2025

Departamento de Mejora Genética Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), CSIC, Madrid, Spain.

The advancement of epigenetics has highlighted DNA methylation as an intermediate-omic influencing gene regulation and phenotypic expression. With emerging technologies enabling the large-scale and affordable capture of methylation data, there is growing interest in integrating this information into genetic evaluation models for animal breeding. This study used methylome information from six dairy cows to simulate the methylation profile of 13,183 genotyped animals.

View Article and Find Full Text PDF

Elemental partitioning, morpho-physiological effects, genotoxicity, and health risk assessment associated with tomato (Solanum lycopersicum L.) grown in soil contaminated with mining tailings.

Environ Res

January 2025

Doctorado en Ciencias Ambientales, Centro de Ciencias de Desarrollo Regional, Universidad Autónoma de Guerrero. Privada de Laurel 13, Col. El Roble, 39640, Acapulco, Guerrero, México; Facultad de Ciencias Agropecuarias y Ambientales, Unidad Tuxpan, Universidad Autónoma de Guerrero. Carretera Iguala-Tuxpan, km 2.5, Iguala de la Independencia, Guerrero, México; Facultad de Ciencias Agropecuarias, Universidad Autónoma del Estado de Morelos. Avenida Universidad 1001, 62210, Cuernavaca, Morelos, México; Laboratorio de Toxicología Ambiental, Departamento de Ciencias Ambientales, Instituto de Ciencias de la Atmósfera y Cambio Climático, Universidad Nacional Autónoma de México, Ciudad Universitaria Coyoacán, Ciudad de México 04510, México; Centro Nacional de Recursos Genéticos, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Tepatitlán de Morelos, 47600, Jalisco, México; Escuela Superior de Ciencias de la Tierra, Universidad Autónoma de Guerrero. Ex-hacienda de San Juan Bautista, Taxco el Viejo, 40323, Taxco el Viejo, Guerrero, México. Electronic address:

This study explored the distribution of macronutrients (Ca, Mg, Na, K) and lithogenic (Ba, Cr, Ni, Mn, Fe) and mining-related (As, Pb, Cd, Cu, Zn) toxic metalloids and metals (TMMs) in tomato (Solanum lycopersicum L.), and its effects on plant development, productivity, genotoxicity, and human health, using a soil affected by mine tailings (AS) and an unaffected control soil (CS). The chemistry of soils reflected their mineralogy, and Fe-Ti oxides, sulfides and sulfosalts were found to be the most significant reservoirs of TMMs.

View Article and Find Full Text PDF

Current State of Research on Health-Promoting Functional Properties in Berry-Based Foods.

Curr Nutr Rep

January 2025

Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, ITAPROQ (UBA-CONICET), Universidad de Buenos Aires, Intendente Güiraldes, s/n, Ciudad Universitaria, Buenos Aires, 1428, Argentina.

Purpose Of Review: This review aims to consolidate recent findings on the development and functional validation of berry-based foods while proposing guidelines for future advancements.

Recent Findings: Current investigations on berry-based functional foods (dairy and bakery products, snacks, etc.) emphasize their potential health benefits, including antioxidant effects, glycemic control, enzyme modulation, among others.

View Article and Find Full Text PDF

Objectives: This study aimed to synthesize polylactic acid (PLA) nanofibrillar scaffolds loaded with ibuprofen (IBU) using electrospinning (ES) and air-jet spinning (AJS). The scaffolds were evaluated for their physicochemical properties, drug release profiles, and biocompatibility to assess their potential for local analgesic applications.

Methods: Solutions of 10% (/) PLA combined with IBU at concentrations of 10%, 20%, and 30% were processed into nanofibrillar membranes using ES and AJS.

View Article and Find Full Text PDF

Structure-Function Relationship of the β-Hairpin of HB27 Laccase.

Int J Mol Sci

January 2025

Departamento de Micro y Nanotecnologías, Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Cto. Exterior S/N, C.U., Coyoacán, Ciudad de México C.P. 04510, Mexico.

Thermus thermophilus HB27 laccase (Tth-Lac) is a thermostable enzyme that contains a β-hairpin (Ala292-Gln307) covering the substrate entrance. We analyzed the role of this β-hairpin in the enzymatic activity of Tth-Lac through three β-hairpin mutants: two variants without the β-hairpin (C1Tth-Lac and C2Tth-Lac) and one with a partially modified β-hairpin (P1Tth-Lac). Enzymatic activity was assayed with different substrates with and without copper.

View Article and Find Full Text PDF

Chemical Composition of Mexicali Propolis and Its Effect on Gastric Repair in an Indomethacin-Induced Gastric Injury Murine Model.

Antioxidants (Basel)

January 2025

Laboratorio de Investigación Biomédica en Productos Naturales, Carrera de Medicina, UNAM, FES Iztacala, Avenida de los Barrios Número 1, Tlalnepantla de Baz 54090, Mexico.

Propolis is a resinous substance produced by bees that has several biomedical properties that could contribute to the repair process of the gastric mucosa, such as antioxidant, anti-inflammatory, healing, and gastroprotective properties. Thus, this study aimed to determine the chemical composition of Mexicali propolis, its antioxidant capacity, and its effect on gastric repair. Three polarity-directed extracts were obtained: the ethanolic extract, the ethyl acetate extract, and the hexane extract.

View Article and Find Full Text PDF

Amphibian-Derived Peptides as Natural Inhibitors of SARS-CoV-2 Main Protease (Mpro): A Combined In Vitro and In Silico Approach.

Chem Biodivers

January 2025

Universidad Nacional del Litoral Facultad de Bioquimica y Ciencias Biologicas, Química Orgánica, Ciudad Universitaria. Paraje el Pozo S/N, Argentina, 3000, Santa Fe, ARGENTINA.

The COVID-19 pandemic, caused by the SARS-CoV-2 virus, has highlighted the urgent need for novel therapeutic agents targeting viral enzymes such as the main protease (Mpro), which plays a crucial role in viral replication. In this study, we investigate the inhibitory potential of 23 peptides isolated from the skin of amphibians belonging to the Hylidae and Leptodactylidae families against SARS-CoV-2 Mpro. Five peptides demonstrated significant inhibition using a colorimetric Mpro inhibition assay, with IC50 values ranging from 41 to 203 µM.

View Article and Find Full Text PDF

Conformational versatility among crystalline solids of L-phenylalanine derivatives.

Acta Crystallogr C Struct Chem

February 2025

Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Piso 3, Ciudad Universitaria, C1428EGA Buenos Aires, Argentina.

In this study, we present a new N-derivative of L-phenylalanine with 2-naphthaldehyde (PN), obtained by the Schiff base formation procedure and its subsequent reduction. This compound was crystallized as a zwitterion {2-[(naphthalen-2-ylmethyl)azaniumyl]-3-phenylpropanoate, CHNO}, as an anion in a sodium salt (catena-poly[[diaquasodium(I)-di-μ-aqua] 2-[(naphthalen-2-ylmethyl)amino]-3-phenylpropanoate monohydrate], {[Na(HO)](CHNO)·HO}), as a cation in a chloride salt [(1-carboxy-2-phenylethyl)(naphthalen-2-ylmethyl)azanium chloride acetic acid monosolvate, CHNO·Cl·CHCOOH], and additionally acting as a ligand in the pentacoordinated zinc compound aquabis{2-[(naphthalen-2-ylmethyl)amino]-3-phenylpropanoato-κO}zinc(II), [Zn(CHNO)(HO)] or [Zn(PN)(HO)], denoted (PN-Zn), with the amino acid derivative in its carboxylate form.

View Article and Find Full Text PDF

The Effect of Temperature over the Growth and Biofilm Formation of the Thermotolerant .

J Fungi (Basel)

January 2025

Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prol. Carpio y Plan de Ayala s/n Col. Casco de Santo Tomás, Alcaldia Miguel Hidalgo, Mexico City C.P. 11340, Mexico.

is a medically relevant fungus, particularly in tropical regions. Although its aflatoxin production and thermotolerance are well documented, its biofilm-forming ability has received less attention, despite being a key factor in the virulence of as an opportunistic pathogen, which can significantly impact therapeutic outcomes. To investigate the influence of temperature on the growth and biofilm formation of an isolate, we compared it on solid media with the reference strain ATCC 22546 and documented morphological changes during conidial germination.

View Article and Find Full Text PDF

Plastic pollution, particularly from microplastics (MPs) and nanoplastics (NPs), has become a critical environmental and health concern due to their widespread distribution, persistence, and potential toxicity. MPs and NPs originate from primary sources, such as cosmetic microspheres or synthetic fibers, and secondary fragmentation of larger plastics through environmental degradation. These particles, typically less than 5 mm, are found globally, from deep seabeds to human tissues, and are known to adsorb and release harmful pollutants, exacerbating ecological and health risks.

View Article and Find Full Text PDF

Assessment of temperature dynamics during methane oxidation in a pilot scale compost biofilter.

Bioresour Technol

January 2025

Instituto de Ingeniería, Universidad Nacional Autónoma de México, Circuito Escolar, Ciudad Universitaria, C.P. 04510 Ciudad de México, México. Electronic address:

Biological methane oxidation can sustain high temperatures in organic matrices, such as landfill covers and compost biofilters. This study investigates the temperature dynamics, methane removal efficiency, and microbial community responses in a pilot scale compost biofilter under three methane concentrations (2, 4, and 8 % v v in air) with a 23-minute empty bed residence time. Complete methane removal was achieved at 2 %, with compost bed temperatures reaching 51 °C.

View Article and Find Full Text PDF

Dataset of aerial photographs acquired with UAV using a multispectral (green, red and near-infrared) camera for cherry tomato ( var. ) monitoring.

Data Brief

February 2025

Tecnológico Nacional de México/Instituto Tecnológico de Culiacán, División de Estudios de Posgrado e Investigación, Juan de Dios Batíz 310. Col. Guadalupe, 80220 Culiacán, Sinaloa, Mexico.

A dataset of aerial photographs acquired with an Unmanned Aerial Vehicle (UAV) DJI Phantom 4 Pro is presented for monitoring a cherry tomato ( var. ) crop in Navolato, Mexico. Seven photogrammetric flights were carried out to assess the plant growth using a Mapir Survey 3W multispectral camera.

View Article and Find Full Text PDF

Impact of glyphosate herbicide exposure on sperm motility, fertilization, and embryo-larval survival of pejerrey fish (Odontesthes bonariensis).

Environ Sci Pollut Res Int

January 2025

Laboratorio de Ictiofisiología y Acuicultura, Instituto Tecnológico de Chascomús (CONICET-UNSAM), Chascomús, Argentina.

The herbicide glyphosate is widely used in agricultural practices around the world, can reach aquatic environments, and potentially impact non-target organisms. This study aimed to investigate the effects of glyphosate exposure (both as the active ingredient and its formulated product) on sperm quality, fertilization success, and development of pejerrey (Odontesthes bonariensis), a native freshwater fish species from Argentina. Results revealed a statistically significant increase in sperm motility at the highest concentration of the formulated product.

View Article and Find Full Text PDF

Aquatic ecosystems are reservoirs of biodiversity and are highly threatened. Among the main threats to biodiversity are invasive species and global warming, the later has allowed the establishment of invasive species from originally warmer climates outside their native range by reducing the barriers to their establishment and distribution. Behaviour is the immediate response that species modify to counteract changes in their environment.

View Article and Find Full Text PDF

The regulatory network that controls lymphopoiesis.

Biosystems

January 2025

Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, 3er Circuito Exterior s/n, Ciudad Universitaria, 04510, CdMx, México.

Lymphopoiesis is the generation of the T, B and NK cell lineages from a common lymphoid-biased haematopoietic stem cell. The experimental study of this process has generated a large amount of cellular and molecular data. As a result, there is a considerable number of mathematical and computational models regarding different aspects of lymphopoiesis.

View Article and Find Full Text PDF

Disturbance of epigenetic processes can lead to altered gene function and malignant cellular transformation. In particular, changes in the epigenetic landscape are a central topic in cancer biology. The initiation and progression of cancer are now recognized to involve both epigenetic and genetic alterations.

View Article and Find Full Text PDF

Phylogenomics and species delimitation in the Lepidophyma sylvaticum complex (Squamata: Xantusiidae) using ddRADseq and morphological data.

Mol Phylogenet Evol

January 2025

Laboratorio de Herpetología and Museo de Zoología Alfonso L. Herrera, Departamento de Biología Evolutiva, Facultad de Ciencias, Universidad Nacional Autonoma de México, Ciudad Universitaria, Coyoacán C.P. 04510, CDMX, México. Electronic address:

The Lepidophyma sylvaticum complex occurs from west-central Nuevo León to the Sierra de Chiconquiaco in central Veracruz, Mexico. Morphological studies have revealed population groups that are "moderately divergent from each other" within the complex. In addition, a molecular phylogenetic study found L.

View Article and Find Full Text PDF

Extreme droughts in the Amazon Basin during cyclic ENSO events coupled with Indian Ocean Dipole modes and Tropical North Atlantic warming.

Sci Total Environ

February 2025

Programa de Pós-Graduação em Clima e Ambiente, Instituto Nacional de Pesquisas da Amazônia, Universidade do Estado do Amazonas, Av. André Araújo, 2936, Bairro Aleixo, 69060-001 Manaus, AM, Brazil.

The teleconnections between El Niño-Southern Oscillation (ENSO), the Indian Ocean Dipole (IOD), and Tropical North Atlantic warming (+TNA) play a critical role in characterizing extreme drought events in the Amazon Basin (AB). This study examines the seven most recent drought extreme events up to 2023, using seasonal composites of the sea surface temperature and atmospheric variables over a five-quarter period starting at the austral spring(-1) of the year preceding that when the lowest water level at Manaus port was recorded. Two distinct patterns emerge, driven by consecutive ENSO events with opposite phases, referred to as cyclic La Niña-El Niño and cyclic El Niño-La Niña drought events.

View Article and Find Full Text PDF

Defending Ti6Al4V against Biofilm Formation with Albumin Biofunctionalization.

Langmuir

January 2025

Universidad Nacional de Córdoba, Facultad de Ciencias Químicas, Departamento de Fisicoquímica, Ciudad Universitaria, X5000HUA Córdoba, Argentina.

Surface biofunctionalization with structurally perturbed albumin, as well as with other plasmatic proteins, inhibits the initial bacterial adhesion and biofilm formation, involved in numerous healthcare-associated infections. In fact, we have reported this protective effect with thermally treated plasmatic proteins, such as albumin and fibrinogen, adsorbed on flat silica surfaces. Here, we show that albumin biofunctionalization also works properly on flat Ti6Al4V substrates, which are widely used to fabricate medical devices.

View Article and Find Full Text PDF

Alterations caused by human activities in the environment, such as dredging, modify the physicochemical conditions and affect the habitat. Maintenance dredging that allows large vessels access to inland ports is a recurring disruptive action. The study aimed to evaluate, during a maintenance dredging operation in a port area of the Paraná River, the modifications in the structure of the river, the presence of contaminants and bacterial organisms.

View Article and Find Full Text PDF

Context: This study meticulously examines the criteria for assigning electron rearrangements along the intrinsic reaction coordinate (IRC) leading to bond formation and breaking processes during the pyrolytic isomerization of cubane (CUB) to 1,3,5,7-cyclooctatetraene (COT) from both thermochemical and bonding perspectives. Notably, no cusp-type function was detected in the initial thermal conversion step of CUB to bicyclo[4.2.

View Article and Find Full Text PDF