Universidade Federal do Rio de Janeiro

Macrophyte litter diversity affects microbial respiration but not litter mass loss

Abstract Litter mixing effects (LME) may alter microbial-mediated decomposition in aquatic ecosystems, but it remains unclear whether these effects are related to the chemical diversity of litter and leachates or whether they change over time. Furthermore, most aquatic studies of...

How common is alcohol use disorder in posttraumatic stress disorder? A systematic review, meta‐analysis, and moderator analysis

BACKGROUND AND OBJECTIVES: Comorbidity between posttraumatic stress disorder (PTSD) and alcohol use disorder (AUD) complicates care, yet reported prevalence varies widely across settings and methods. We estimated AUD prevalence among adults with PTSD and identified sources of var...

Efficient heuristics for the Steiner forest problem

Abstract Let be a connected undirected graph, a set of nodes, a set of edges, , and . Given a non‐negative weight function associated with its edges, a set of terminal sets , the Steiner forest problem (SFP) consists of finding a subset of edges with the minimal cost such that al...

The Organization of Home Palliative Cancer Care by Primary Health Care: A Systematic Review

Background: Home-based palliative cancer care coordinated by primary care has been proposed as a strategy to improve access, continuity, and alignment with patient preferences, but its organizational characteristics and effects remain insufficiently synthesized. Aim: The aim was...

Arc-related and high-grade dry metamorphic conditions of the Búzios Orogeny: A case study of. ∼500 Ma orthogranulites from Ilha Grande, Rio de Janeiro – Brazil

In situ U-Pb and Lu-Hf analyses performed by laser ablation multi-collector inductively coupled plasma mass spectrometry (LA-MC-ICP-MS) on zircons and cathodoluminescence (CL) images were performed to isotopically characterize the granulitic metamorphism of the Ribeira Belt in Il...

Western amazon 2020 extreme heatwave

Abstract Between September and November 2020, an extreme climate event characterized by the co-occurrence of severe drought, extreme heat stress, widespread burning, and respiratory health impacts affected southwestern Amazonia. This study investigated the event using an integrat...

Balance Control and Its Correlation with Functional Capacity in People with Post-Tuberculosis Lung Disease

Background: Because falls can lead to loss of autonomy in individuals with post-tuberculosis lung disease (iwPTLD), assessing fall risk is crucial for reducing the likelihood of fractures and preventing the decline of physical function. This cross-sectional study aimed to evaluat...

The organization and dynamics of viral factories

ABSTRACT Viral factories (VFs) are dynamic, virus-induced microcompartments that serve as centralized hubs in the host cell for viral genome replication, transcription, and virion assembly. These structures employ unique viral mechanisms for remodeling cellular architecture to cr...

State of Climate in Latin America and the Caribbean in 2025: A Review

ABSTRACT This review summarises mean and extreme climate conditions for 2025 across the Latin American and Caribbean (LAC) region and is based on the State of Climate for Latin America and the Caribbean 2025 Report, recently released by the World Meteorological Organization (WMO)...

Evolution of striking dominance in Ultimate Fighting Championship: A cross-temporal analysis of factors associated with victory

This study examined the evolution of action frequencies associated with victory in UFC bouts across three distinct eras (2003–2004, 2013–2014, and 2023–2024). A total of 1722 fights were analyzed: Early Era (2003–2004; n = 77), Transition Era (2013–2014; n = 813), and Modern Era...

Critical Analysis of Keynes’s Optimism Regarding the Very Long Run: Economic Possibilities and Political Impossibilities of Capital Accumulation

The present paper analyzes, from the surplus approach, one famous prediction made by Keynes in ‘Economic Possibilities for our Grandchildren’: that society would become so prosperous that the ‘economic problem’ would be solved, shifting human concerns towards the question of how...

Conventional and Ultrasound-Assisted Extraction: Comparison for Techno-Functional Properties, Sustainability, and Challenges for Plant-Based Food Applications

The growing demand for sustainable protein ingredients has intensified interest in legumes as strategic raw materials for plant-based food applications. Legume proteins, mainly composed of globulins, albumins, vicilins, and legumins, exhibit relevant nutritional and techno-functi...

Cefepime and Mortality

Importance Cefepime is recommended for the treatment of febrile neutropenia and gram-negative infections at moderate risk of ampicillin resistance locus C β-lactamase production. Concerns regarding cefepime’s safety have been raised in the literature without firm conclusions. Obj...

Accurate prediction of UV absorption in zirconia–alumina mixed oxide (ZrAl4O8) via GW–BSE calculations

Abstract Context Zirconia is a technologically relevant material widely employed in catalysis owing to its thermal stability, acid–base surface properties, and optical response, enabling applications both as a solid acid catalyst and as a photocatalytic material. Even so, the rel...

Quasi-rigid operators and hyperrecurrence

We study recurrent operators from a new perspective by introducing the notion of hyperrecurrent operators and establish robust connections with quasi-rigid operators. For example, we prove that a recurrent operator on a separable Banach space is quasi-rigid if and only if it is a...

Combustion Properties of Timber in Historic Structures: Case Study of the São Pedro de Alcântara Chapel Fire

ABSTRACT Timber plays a fundamental role in the fire performance of historic building components, where ageing and environmental exposure can markedly influence its physical and chemical properties. This study presents an experimental investigation of the fire behaviour of Ocotea...

Humanizing pediatric anesthesia care: development and validation of an educational video for caregivers

OBJECTIVE: To develop an educational video on pediatric anesthesia, obtain evidence of content validity from experts, and assess its clarity, adequacy, and acceptability among caregivers. METHODS: This methodological study was conducted at a tertiary pediatric university hospital...

GNN-Flash: A Hybrid Graph Neural Network Framework for Bypassing Stability Analysis in Two-Phase Flash Calculations with Generalization to Unseen Mixtures

Abstract Flash calculations are fundamental for determining phase behavior under specified thermodynamic conditions. Conventional approaches rely on iterative procedures, including phase stability analysis and phase-split calculations, which are computationally demanding due to t...

Kinetic and thermodynamic assessment of the oxidation of diesel fuels containing HVO and biodiesel

Diesel fuel formulations containing hydrotreated vegetable oil (HVO) and biodiesel (content given after “B”), B10, B10R5 (5% HVO), B15, and B20, were aged at 43 °C for 15 weeks and 80 °C for seven days to evaluate their degradation process. Rancimat and PetroOxy induction periods...

Real-world outcomes of CD34⁺ mobilization and early autologous hematopoietic stem cell transplantation recovery after daratumumab-based induction

INTRODUCTION: Daratumumab, an Anti-CD38 monoclonal antibody, is now widely used in frontline induction for transplant-eligible multiple myeloma. Although highly effective, concerns remain regarding its potential impact on CD34⁺ stem cell mobilization and early outcomes after auto...