Universidade Federal do Rio de Janeiro

Resolving the mystery of Cyanerpes (Thraupidae) ‘black eggs’, with notes on the breeding and exaggerated displays of Hypocnemoides antbirds (Thamnophilidae)

Between the end of the nineteenth and the middle of the twentieth centuries intermittent reports of ‘black eggs’ belonging to one or more species of Passeriformes in South America were usually attributed to small-bodied tanagers of the genera Cyanerpes and Chlorophanes. Doubts co...

New and emerging pharmacological treatment options for acromegaly: a 2026 update

Introduction Acromegaly is associated with significant morbidity, impaired quality of life (QoL), and increased mortality when uncontrolled. While current treatments achieve biochemical control in many patients, a substantial proportion remain uncontrolled or experience persisten...

marola-bench: a proposal for a WeatherBench for Brazil

All rights reserved. This record is closed: its files are not shared here. The paper can be read at https://marola-dev.github.io/marola-research/marola-bench/. It may be read and cited; it may not be copied or shared without the written acknowledgement of the author (REUSE.md). W...

Bending response and buckling of dented mechanically lined pipes manufactured by elastic vs. plastic hydraulic expansion

Mechanically lined pipes (MLPs), combining a carbon steel carrier with a corrosion-resistant alloy liner, offer an economical solution for subsea hydrocarbon transportation. Severe bending arises during reel-lay installation and may also develop in service through lateral bucklin...

Circular economy assessment of biomethane value chain in Brazil

Abstract From the numerous opportunities to add value to biomass in Brazil, biomethane production in sugarcane mills presents significant potential. This study introduces a diagnostic framework grounded in circular economy (CE) principles to assess new biomethane projects, aligni...

Perinatal Outcomes of Pleuro-Amniotic Shunting in Isolated Pleural Effusions: Systematic Review and Meta-analysis

Pleuro-amniotic shunting has been proposed for fetal pleural effusion, although its safety and efficacy remain uncertain. Therefore, we aimed to evaluate the perinatal outcomes of the fetal therapy for isolated pleural effusion through a systematic review and single-arm meta-anal...

On the convergence of trajectory statistical solutions

Abstract In this work, a recently introduced general framework for trajectory statistical solutions is considered, and the question of convergence of families of such solutions is addressed. Conditions for the convergence are given which rely on natural assumptions related to a p...

Shifting Patterns of Precipitation Extremes in the S outheast A tlantic Basin— B razil: From Observed Trends to Future Projections

ABSTRACT Understanding the variability and evolution of precipitation extremes associated with climate change is essential to support adaptation strategies, risk management, and civil protection. In this context, this study investigates the climatology, observed trends, and futur...

Mostly Nonuniformly Sectional Expanding Systems

Abstract We introduce the notion of mostly nonuniform sectional expanding (MNUSE) for singular flows which encompasses the notions of sectional hyperbolicity, asymptotically sectional and multisingular hyperbolicity. We construct examples of a vector field of class $$C^r, r \ge 1...

Integrating images, sounds, citizen science and AI to assess the biodiversity of the Atlantic Forest of Brazil

The Atlantic Forest is an endangered biome in Brazil with only 15% of its area remaining. Although it is reported that it has a high biodiversity and many endemic species, the biological composition of its territory remains largely unknown. Citizen science can speed up the descri...

Repurposing the Insecticide Flufenerim, the Only Anti- Cryptococcus Compound Identified in the MMV Global Health Priority Box, as a Candidate for the Environmental Control of the Cryptococcosis Agents

Abstract Cryptococcus neoformans and Cryptococcus gattii are environmental fungi that cause cryptococcosis, a severe, life-threatening infection, particularly in immunocompromised individuals. Current treatments are limited by toxicity, restricted availability, and the emergence...

The Role of Membranes in Tissue Regeneration Therapy: State of the Art and Future Perspectives

Abstract Membranes for tissue regeneration are an indispensable class of biomaterials in regenerative medicine, serving as selective barriers and matrices for the reconstruction of various tissues. Essential characteristics for the clinical success of a biomaterial include its bi...

CFIR-guided formative implementation research to co-design a supervised toothbrushing programme through Anganwadi centres in Kerala, India

Dental caries remains a major public health concern among preschool children, driven by modifiable behaviours such as inadequate toothbrushing and poor oral health practices. Anganwadi Centres are community-based centres within India’s Integrated Child Development Services (ICDS)...

Enabling climate action: A nexus approach for delivering co-benefits across biodiversity, water, food, and health

Climate response options rarely affect biodiversity, water, food, and health in uniform ways. This comparative analysis examines why technically viable response options generate uneven cross-nexus outcomes, and how governance and justice conditions shape whether these outcomes be...

The Impact of PICU Diaries on Posttraumatic Stress Disorder and Psychological Distress in Parents of Critically Ill Children Admitted to PICUs: A Randomized Cluster Crossover Trial

OBJECTIVES: The study aimed to assess the effect of using diaries during hospitalization in a PICU on the occurrence of posttraumatic stress disorder (PTSD) and psychologic distress among family members of critically ill children. DESIGN: A two-arm, two-period, cluster-randomized...

Micrographic Evaluation of Water-in-Oil Emulsion Stability up to Critical Electric Field

Abstract Electrostatic demulsification is widely applied in the petroleum industry for the separation of water-in-oil emulsions; however, the relationship between microscopic droplet dynamics and the macroscopic electrical response remains insufficiently understood, particularly...

Nonlocal Hamilton–Jacobi Equations on a network with Kirchhoff type conditions

In this article, we consider nonlocal Hamilton–Jacobi Equations on networks with Kirchhoff type conditions for the interior vertices and Dirichlet boundary conditions for the boundary ones: we provide general existence and comparison results in the case when the nonlocal operator...

Biomolecules under Pressure: Protein Phase Transitions from Folding to Misfolding, Aggregation, and Condensation

Abstract High hydrostatic pressure provides a unique and sensitive perturbation to protein structure, enabling direct measurement of volume changes associated with folding, misfolding, and assembly. Because pressure perturbs noncovalent forces while preserving covalent integrity,...

Chronotype and Exercise Performance: Physiological Mechanisms, Practical Applications, and Future Directions—A Narrative Review

Chronotype, defined as an individual’s circadian preference for sleep, wakefulness, and daily activities, has emerged as a potential modifier of exercise performance. This narrative review aimed to synthesize current evidence regarding the relationship between chronotype and exer...

Max Fink (1923-2025)

Forty years after the inaugural issue of the journal Convulsive Therapy in March 1985—renamed in 1997 to The Journal of ECT —the scientific community now mourns the loss of the journal founder and first editor-in-chief, Max Fink. He was one of the world-leading experts who most v...