Universidade Federal do Rio Grande

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...

Turbulence and mixing along a microtidal and stratified estuary-shelf transition

Abstract. This study investigates the hydrodynamic and mixing processes at the estuary–shelf transition of a microtidal system, and the buoyant plume generated at the Patos Lagoon mouth (Brazil). Using measurements of turbulent kinetic energy (TKE) dissipation (ϵ), current veloci...

Analysis of the performance of a top-hinged flap-type wave energy converter using a RANS-VoF numerical model

The performance of a full-scale top-hinged flap-type wave energy converter in the open sea is analyzed numerically in this study. A free surface flow Reynolds-Averaged Navier-Stokes numerical model is used with the ANSYS Fluent® software. The flap, 7 m long, is immersed in a flum...

Severe Multifocal Cutaneous Sporotrichosis Caused by Sporothrix brasiliensis in People Living with HIV in Southern Brazil: Cases and Review

Background: Sporothrix brasiliensis-associated sporotrichosis is an emerging zoonotic mycosis in South America, especially in Brazil. Whereas sporotrichosis is classically described as a lymphangitic disease, multifocal forms occur, predominantly in people living with HIV (PLHIV)...

Legacy contaminants and low occurrence of PAHs in Sotalia guianensis from a highly impacted coastal region, Santos Basin, Brazil

Abstract Guiana dolphins ( Sotalia guianensis ) are coastal top predators exposed to persistent organic pollutants (POPs) and polycyclic aromatic hydrocarbons (PAHs). We evaluated PCBs, DDTs, and PAHs in liver tissues of 70 stranded individuals from the Santos Basin, southeastern...

Patient Safety in Primary Health Care: A Scoping Review of Characteristics, Thematic Dimensions, and Gaps in the Literature

Patient safety in primary health care (PHC) is a multidimensional and systemic phenomenon, although the literature retrieved under the specified search and eligibility criteria was heterogeneous and unevenly distributed across geographic contexts. This scoping review aimed to map...

Performance-based durability assessment of concrete containing coal bottom ash as fine aggregate under chloride penetration

Abstract The use of industrial wastes represents an alternative for reducing the consumption of natural aggregates in concrete production. Coal bottom ash (CBA), a byproduct of coal combustion in thermal power plants, has been employed as a partial replacement for fine aggregates...

Clinical and Epidemiological Profile of Children Evaluated at a Public Pediatric Cardiology Service in Southern Brazil

Background/Objectives: Congenital heart disease (CHD) is a major cause of congenital morbidity and mortality, but evidence from public pediatric cardiology services in Brazil remains limited. This study aimed to characterize the clinical and epidemiological profile of children an...

Adsorption of Erythrosine Red onto Silica Synthesized with Ora-Pro-Nobis as a Natural Porogenic Template: Equilibrium, Kinetic, and Thermodynamic Evaluation

In this study, a silica-based adsorbent was synthesized via a two-step sol–gel route. A branch of ora-pro-nobis (Pereskia aculeata Miller) was used as a porogenic template. The biomass was incorporated into the silica matrix and subsequently removed by calcination. The resulting...

Valorization of Spent Hops (Humulus lupulus L.) into Biochar and Activated Carbon: Characterization, Phenol Adsorption, and Cost Assessment

Spent hops generated during the dry-hopping stage of beer production were investigated as a precursor for the production of biochar and ZnCl2-activated carbon for phenol adsorption from aqueous solutions. The effects of production conditions on adsorption performance were evaluat...

Structure and Propagation of Mesoscale Cyclonic Eddies in the Brazil–Malvinas Confluence

ABSTRACT We present a comprehensive characterization of 1386 cyclonic eddies generated in the Brazil–Malvinas Confluence (BMC) between 1993 and 2022, using satellite altimetry and the META3.2_DT eddy trajectory atlas. By isolating locally generated cyclones over a record spanning...

Occupational pesticide exposure and multidimensional risk perception among family farmers: implications for One health

Pesticide use represents an important One Health challenge due to its interconnected effects on human health, environmental quality, and food production systems. This study evaluated occupational exposure to pesticides and multidimensional risk perception among family onion farme...

Heat sink fins design based on the Constructal Law: a CFD approach for air-cooled electronic devices

Thermal management represents a critical challenge for the reliability and lifespan of modern power electronics, such as medium-power photovoltaic (PV) inverters. This work presents a self-organizing generative design methodology for air-cooled heat sinks embedded within a realis...

Gonad Status, Condition Index and Biochemical Composition of the Yellow Clam Amarilladesma mactroides

The yellow clam, Amarilladesma mactroides, is an abundant component of the intertidal infauna of the southwestern Atlantic Ocean and an important source of food and income for local communities. In recent years, this species has been increasingly affected by anthropogenic and env...

Microstructure and mechanical properties of H13 tool steel fabricated by additive manufacturing

Abstract The fabrication of molds for injection molding of polymeric materials using 3D printing from tool steels is increasingly being considered due to its potential for higher productivity compared to conventional manufacturing processes. Understanding the mechanical and micro...

Alcoholic beer fermentation: impact of glutathione and peroxidase fortification on deoxynivalenol reduction

Abstract The use of contaminated cereals in fermentation processes can elicit a marked response from yeasts in the presence of mycotoxins, as indicated by the production of defense compounds such as peroxidase (PO) and glutathione (GSH) to reduce mycotoxin damage. The objective o...

A compilation of global bio-optical in situ data for ocean-colour satellite applications – version four

Abstract. A global in situ dataset for validation of satellite products from the ESA Ocean Colour Climate Change Initiative (OC-CCI) is presented. This version of the compilation, with data starting in 1996, extends to 2025, which is important for the validation of recent algorit...

Sexual dimorphism of the human calcaneus: a cross-sectional morphometric study

Sex estimation from skeletal remains is a fundamental step in forensic anthropology. The calcaneus, the largest tarsal bone, is robust and may serve as an alternative indicator when the skull and pelvis are unavailable. This study evaluated sexual dimorphism in the calcaneus of a...

Magnetic fields and agro-industrial by-products as sustainable approaches to enhance carotenoid and lipid production by Rhodotorula mucilaginosa

This study aimed to evaluate magnetic fields (MF) and agro-industrial media as sustainable approaches to produce carotenoids and lipids by Rhodotorula mucilaginosa. Cultivations were carried out in shaken flasks with previously optimized agro-industrial media with sugarcane molas...