Universidade Federal do Rio Grande do Sul

Schizophrenia research in 2026: report from the annual meeting of the Schizophrenia International Research Society

Abstract SIRS 2026, held under the theme “Schizophrenia Research in the Era of Artificial Intelligence,” brought together researchers, clinicians, and persons with lived experience to take stock of a field whose tools for measuring, predicting, and intervening in psychosis have e...

Clozapine Across Treatment-Resistant Symptom Dimensions: A Conceptual Review and Transdiagnostic Rationale for Child and Adolescent Psychiatry

Clozapine is the most effective antipsychotic for treatment-resistant schizophrenia, yet in children and adolescents it remains off-label and underused, constrained by safety concerns and scarce pediatric-specific evidence. Its benefits may extend beyond any single diagnostic cat...

Task force of the Brazilian Society of Otology and the Brazilian Academy of Neurotology: Menière’s Disease

Objective To critically review the available evidence on the pathophysiology and diagnosis of Menière’s disease and to provide consensus-based recommendations developed by a task force of the Brazilian Society of Otology and the Brazilian Academy of Neurotology. Methods A task fo...

Thermal Performance of a PCM Reservoir with Y-Shaped Fins for Lithium-Ion Battery Thermal Management

This work numerically investigates how Y-shaped metallic fins embedded in a phase change material (PCM) reservoir affect the thermal management of lithium-ion batteries. The constructal design method was applied to evaluate the effects of the number of fins and Y-shaped bifurcati...

Spatially Extensive Snapshot Sampling Reveals Regional Turnover and Complements Temporal Surveys of Drosophilidae in Southern Brazil

Sampling design strongly influences which components of biodiversity are recovered in regional inventories. We evaluated a spatially extensive snapshot survey of Drosophilidae assemblages in southern Brazil and compared it with temporally repeated datasets from the same broad reg...

Applied nutritional investigation determinants of lower quadriceps skeletal muscle measured by ultrasound at ICU admission: a cross-sectional analysis

Background Low skeletal muscle (SM) is common at ICU admission and is associated with worse prognosis. Early identification of at-risk patients is essential, but determinants of low SM in critically ill patients remains unclear. Objective To identify sociodemographic, nutritional...

Microstructural and Mechanical Characterization of ER310 Stainless Steel Produced by Dual-Wire Laser Additive Manufacturing

Wire Laser Additive Manufacturing (WLAM) has emerged as a promising directed energy deposition technology, combining the high deposition efficiency of wire-fed processes with the localized heat input and dimensional accuracy provided by laser processing. However, studies on heat-...

The differences in the Narrow Line Region of nearby QSOs 1 and QSOs 2: II - Signatures of kinetic feedback

Abstract We compare the integrated kinematic properties of the Narrow-Line Region (NLR) of ~1500 type 1 and ~700 type 2 QSOs at 0.4 ≤ z ≤ 0.5 using emission-line profiles from SDSS-IV spectra. The NLR [O iii]λ5007 and Hβ emission lines are fitted using a two-component model compr...

Evaluation of a Community Intervention for Food and Nutritional Education in Quilombola Communities of Rio Grande do Sul, Brazil: A Community Assessment with Quanti-Quali Approach

Abstract Objective To evaluate a community-based food education intervention aimed at improving dietary quality in Brazilian quilombola communities. Methods This non-randomized cluster community trial used a mixed-methods approach with census-like sampling in four communities in...

States of 2D Yang-Mills and large-volume entanglement

A bstract We explore the relation between geometry, topology and entanglement for quantum states in two-dimensional Yang-Mills theory. The most familiar class of states in this theory are states defined by Euclidean path integrals over Riemann surfaces. Bipartite states of this c...

A Systematic Review of the Durability of Natural Fiber-Reinforced Cement Composites Under Accelerated Aging

Plant fiber-reinforced fiber–cement composites are promising sustainable products, but their durability under alkaline and moisture-variable conditions remains a key limitation. This systematic review critically examines accelerated aging methodologies applied to plant fiber-rein...

Directional centroid trajectories reveal shifting fire activity across Brazilian biomes

Abstract Understanding how fire activity reorganizes across space is key to interpreting long-term interactions among climate variability, land-use change, and integrated fire management in Brazil. Yet this reorganization is difficult to read directly: annual maps of millions of...

Size-Normalized Fecundity Reveals Reversed Geographic Patterns in the Porcelain Crab Pachycheles laevidactylus (Crustacea: Decapoda: Porcellanidae)

Fecundity in pleocyemate crustaceans is defined as the number of eggs produced per spawning event and is strongly dependent on female body size, which can limit direct comparisons among populations. To address this limitation, we evaluated geographic variation in fecundity in the...

Systematic Review and Meta-analysis of Prevalence of Mental Disorders and Suicidality Among Children and Adolescents Living with HIV in South Africa

Abstract Despite progress in HIV prevention and treatment, global data suggests that youth living with HIV remain at risk of mental disorders and suicidality. However, reliable epidemiological data from South Africa (SA) are limited. We conducted a systematic review and meta-anal...

Thermophysical Properties of [EMIM][BF4] and [EMIM][EtSO4] Mixtures with Molecular Solvents from a Charge-Transfer-Informed Force Field

Abstract Thermophysical properties of the ionic liquids 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4]) and 1-ethyl-3-methylimidazolium ethyl sulfate ([EMIM][EtSO4]), and of their binary mixtures with acetonitrile and ethanol, were investigated by molecular dynamics s...

BBP transition and the leading eigenvector of the spiked Wigner model with inhomogeneous noise

The spiked Wigner ensemble is a prototypical model for high-dimensional inference. We study the spectral properties of an inhomogeneous rank-one spiked Wigner model in which the variance of each entry of the noise matrix is itself a random variable. In the high-dimensional limit,...

Characterization of an EPS-Enriched Emulsifying Extracellular Fraction Produced by a Brazilian Strain of Vreelandella zhaodongensis

Microbial exopolysaccharides (EPS) are structurally diverse biopolymers with ecological and biotechnological relevance due to their physicochemical and functional properties, including emulsification, metal chelation, and contributions to biofilm formation. In this study, an EPS-...

Functionalization of Chitosan and Application in Nanocomposites for Methyl Orange Adsorption

Abstract The production of efficient adsorbents for azo dye removal by synthesizing and evaluating aminosilane-modified chitosan (S-Chi), as well as the formation of nanocomposites containing magnetite (Mgt) and silver nanoparticles (AgNPs), is addressed in this work. The nanocom...

Solanum vegetables as potential neuroprotective functional foods in Alzheimer's disease management: A unifying mechanism

Alzheimer's disease (AD) is a multi-etiological neurological condition that requires a holistic therapeutic approach in its management. In view of this functional foods and nutraceuticals have become --promising candidates in AD research. This is because functional foods and nutr...

β-Cyclodextrin/Nerolidol Inclusion Complex as a Potential Ecofriendly Antifungal System against Botrytis cinerea in Postharvest Strawberries

Abstract β-Cyclodextrin (β-CD) encapsulation may offer a strategic approach to overcome the high volatility of nerolidol (NE) for controlling Botrytis cinerea decay in postharvest strawberries. In this study, a β-cyclodextrin/nerolidol inclusion complex (β-CD/NE) was prepared by...