Universidade Federal do Rio de Janeiro

Out into the Open: Occurrence of Extended-spectrum β-lactamase-producing and Multidrug-resistant Escherichia coli in Mariculture and Recreational Coastal Waters

Abstract The Tricycle Protocol is a One Health initiative that involves monitoring extended-spectrum β-lactamase-producing Escherichia coli (ESBL-Ec), an opportunistic intestinal and extraintestinal pathogen that is recognized as critically important for the development of new an...

A new perspective on centroid algorithms for unsupervised discrete clustering in Riemannian manifolds: an approach via optimization

Abstract Clustering is an unsupervised learning technique used to discover hidden structures in data. By identifying patterns and similarities among objects, this methodology enables the organization of datasets into homogeneous groups. This work presents a new perspective on a s...

Anti-Inflammatory, Antioxidant, and Antimicrobial Potential of Natural Products

Natural products have historically represented an important source of bioactive molecules with applications in nutrition, health promotion, and disease management [...]

Are We Asking About Tirzepatide? Emerging Oral Health Implications for Oral Medicine Practice

Data sharing not applicable to this article as no datasets were generated or analyzed during the current study.

Processes and Patterns of Dolomite Precipitation in Aptian Pre‐Salt Deposits of Santos Basin, Brazil

ABSTRACT The Aptian pre‐salt lacustrine carbonates represent the most significant oil exploration target along the South Atlantic margin. Dolomitization of the Santos Basin Barra Velha Formation (BVF) is critical for reservoir quality, yet its origin, patterns, and evolution rema...

Sustainable Management Strategies for a Critically Endangered Conifer in Brazil

The overharvesting of natural resources for human use is highly detrimental to species populations, altering vital demographic rates. Various plant species have been harvested for different purposes, necessitating effective management strategies for species population stability a...

O-Glycosylated Oncofetal Fibronectin Expression in Lesions of Human Cutaneous Leishmaniasis: A Novel Finding in Infectious Diseases

Cutaneous leishmaniasis (CL) is a chronic infectious disease characterized by extensive tissue destruction and profound extracellular matrix (ECM) remodeling. This study provides the first evidence of O-glycosylated oncofetal fibronectin (onf-FN) expression in human CL lesions. I...

Hybrid Integral Transform Solution of a Nonlinear Core-Flooding Model with Capillary Pressure and End Effects

Abstract Oil-water displacement in coreflooding experiments is governed by a nonlinear convection-diffusion equation derived from the extended Buckley-Leverett formulation that accounts for capillary pressure effects. When realistic constitutive relations are combined with nonlin...

Maternal DNA repair safeguards genome stability during the oocyte-to-embryo transition

Abstract De novo mutations are a major source of genetic variation and disease risk, yet the developmental timing and mechanisms underlying their origin require further investigation. While germ cells have traditionally been considered the primary source of these mutations, incre...

Destructive primate-palm interactions: predation by capuchin monkeys causes local extinction of a vulnerable palm species

Defaunation causes the loss of top predators, increases the abundance of herbivores, and has impacts on plant populations. Forest herbivores commonly consume small plant individuals, reducing regeneration. Yet, some herbivores target large, reproductive individuals, with potentia...

Green-assisted extraction of babassu (Attalea speciosa) mesocarp starch: impact of multi-enzymatic and physical strategies on multi-scale structure and techno-functional properties

Abstract Babassu coconut is predominantly found in Brazil and primarily exploited for the high-value kernel oil. This industry generates large amount of babassu mesocarp (23% of the fruit), an underutilized source of non-conventional starch. However, the complex polysaccharide ma...

Intraday Dispatch Strategies of Battery Energy Storage Systems to Smooth the Duck Curve: A Real-Life Brazilian Case

The growing penetration of centralized and distributed solar photovoltaic (PV) generation has introduced significant operational challenges in power systems, most notably the “duck curve” phenomenon, which is characterized by steep net load ramp-up at dusk. This issue has become...

Assessing the agreement and reliability of Magene ® for heart rate monitoring

To evaluate the accuracy and reliability of the Magene ® heart rate (HR) monitor compared to the Polar ® H7 (validated device) during rest, maximal graded exercise test, and active recovery. A within-group study was conducted with 68 healthy adults (21 women). Participants comple...

Spatial variation of the fish community in a mine tailings dam

Abstract It is expected that the spatial distribution of ichthyofauna in reservoirs within mining areas will be affected by environmental changes imposed by damming and the progressive deposition of tailings. In this context, we evaluated variations in the taxonomic and functiona...

Activity-based accident analysis: from blame attribution to organizational learning

This paper proposes Activity-Based Accident Analysis (ABAA) as a methodological framework that integrates organisational accident analysis with the reconstruction of situated work activity. While systemic approaches have advanced the understanding of organisational accidents, the...

Potential sublimating exocomets around the young star PDS 70

Abstract Recent observations by the James Webb Space Telescope (JWST) have indicated the presence of water in the inner regions of the disc around the young protostar PDS 70, but the origin of this water remains unclear. Here we report the discovery of variable absorption lines o...

The lower deciduous dentition of protodidelphids (Mammalia, Marsupialia) from the Itaboraí Basin (lower Eocene), Brazil, and the validity of “ Riolestes capricornicus ” (Goin et al., 2009)

Abstract The Itaboraí Basin, Southeastern Brazil, preserved one of the most diverse mammalian faunas from the Paleogene, with Metatheria comprising more than 60% of its diversity. Among identified metatherian clades, it has been argued that Paucituberculata is represented by “ Ri...

Integrating long-term demography and population genetics reveals the persistence of a threatened palm in fragmented Atlantic Forest landscapes

Anthropogenic disturbances are a major cause of extinction and population decline, especially in small, unprotected forest fragments where demographic and genetic challenges are more pronounced. Euterpe edulis , a key resource palm species in the Atlantic Forest, plays a crucial...

Data-centric training enables meaningful interaction learning in protein-ligand binding affinity prediction

Predicting protein–ligand binding affinity remains a fundamental challenge in drug discovery, where deep learning models have become central. However, these models often struggle with protein and ligand biases, and their generalization to unseen targets remains limited. Here, we...

Acute Ethanol Exposure Inhibits GABA Uptake in Embryonic Chicken Retina

Abstract GABA is the major inhibitory amino acid in the central nervous system (CNS), and its homeostasis is crucial for inhibitory/excitatory balance. Its reuptake is mediated by GABA transporters, including type 1 (GAT-1), a high-affinity GABA plasma membrane transporter. Ethan...