Universidade Federal de Pelotas

Mechanistic understanding of ivermectin and diclofenac removal from Pinus elliottii biochar modified by niobium deposition

Abstract This study investigated the effect of niobium (Nb) surface modification of biochar via magnetron sputtering on the adsorption of ivermectin and diclofenac potassium, using an integrated approach combining equilibrium experiments and statistical physics-based adsorption m...

Lipid Extract from Ulva ohnoi Algae: Chemical Characterization, Antibacterial Potential, and Cytotoxicity in the Search for New Agents Against MDR Infections

Antimicrobial resistance is a critical global concern. This study explored the lipid extract (LE) of Ulva ohnoi regarding its chemical composition, antibacterial activity, and cytotoxicity against multidrug-resistant (MDR) microorganisms. The LE was characterized by GC–MS, thermo...

Molecular evidence of Bartonella spp. in wild felids from Brazil

Abstract Among Felidae, domestic cats play a role as reservoirs for Bartonella henselae , Bartonella clarridgeiae , and Bartonella koehlerae . Despite the well-known relationship between Bartonella spp. and domestic cats, to date, there is still a paucity of reports on Bartonella...

Concentration‐Dependent Lamellar Organization and Structure–Property Relationships in Melt‐Processed EVA /Cloisite 20A Nanocomposites

ABSTRACT The effect of Cloisite 20A content (0–7.5 wt%) on the structural organization and thermomechanical behavior of melt‐processed EVA nanocomposites was systematically evaluated, with emphasis on clay dispersion and lamellar arrangement. X‐ray diffraction revealed a concentr...

Sequence-Activity Relationships and Integrated In Silico and In Vitro Mechanistic Study of the Antimicrobial Peptide PEP-4 against Staphylococcus aureus

Abstract The rise of antimicrobial resistance among ESKAPE pathogens demands novel therapeutic strategies. Here, we evaluate a panel of five synthetic peptides through integrated in vitro and in silico analyses, highlighting PEP-4 as a promising antibacterial lead peptide. Our fi...

Dermatophilosis compatible with Dermatophilus spp. in a rehabilitating brown brocket deer fawn (Subulo gouazoubira)

Abstract Dermatophilosis is an exudative bacterial dermatitis generally associated with Dermatophilus congolensis , widely described in domestic ruminants and cervids from the Northern Hemisphere, but poorly documented in Neotropical cervids. To describe a case of dermatophilosis...

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...

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...

Effects of the Glycerol/Quercetin Ratio on the Structure and Tensile Behavior of PVA-Based Films

Poly(vinyl alcohol) (PVA)-based films containing glycerol and quercetin were prepared by casting as potential active-packaging materials. The effects of the glycerol/quercetin ratio on structural, thermal, mechanical, barrier, and antioxidant properties were investigated. Neat PV...

Influence of Residual Lignin on Mechanical Fibrillation and Colloidal Stability of Cellulose Nanofibrils from Eucalyptus Kraft Pulp

Eucalyptus kraft pulping represents an important source for the production of lignin-containing cellulose nanofibrils (LCNF); however, the influence of controlled residual lignin levels on fibrillation energy demand and suspension stability remains poorly understood. This study e...

Device-Measured Physical Activity, Sedentary Time, and Cardiometabolic Risk Markers in Youth

Importance The evidence for benefits of higher physical activity and lower sedentary time on the cardiometabolic risk profile in youth is based on cross-sectional and small prospective studies. Objective To determine the prospective associations between device-measured physical a...

Preparation, physicochemical characterisation, storage stability and in vitro disinfectant activity of Tagetes minuta (L.) essential oil-loaded polycaprolactone nanocapsules against mastitis pathogens

Abstract This study focuses on the development of nanocapsules loaded with Tagetes minuta essential oil (TEO-NC) for milking management in sustainable dairy systems. The nanocapsules were prepared by nanoprecipitation, and their physicochemical properties were evaluated for 60 da...

Rheological, Viscoelastic, and Dynamic Mechanical Behavior of ZnO-Filled and MA-Modified PP/SEBS Filaments for Fused Filament Fabrication

Abstract Immiscible polyolefin–elastomer blends often exhibit limited impact resistance and unstable melt-flow behavior due to weak interfacial adhesion and inefficient stress transfer between phases. These limitations are relevant for fused filament fabrication (FFF), where fila...

Molecular and Epidemiological Surveillance of Sporothrix spp. in Cats and Dogs from Southern Brazil

Abstract Sporotrichosis , a subcutaneous mycosis caused by Sporothrix spp., has emerged as a major zoonotic disease in Brazil, primarily driven by Sporothrix brasiliensis . The southern state of Rio Grande do Sul exhibits distinctive ecological and climatic conditions that may sh...

Crop, mulching and season effects on direct seeding for subtropical forest restoration and agroforestry systems

Abstract Direct seeding is a cost-effective technique for forest restoration and a practical tool for establishing agroforestry systems, yet its performance in subtropical climates remains insufficiently documented. We tested the effects of season (winter vs. summer), mulching, a...

Macroscopic and ultrasonographic anatomy of the brachial plexus in the American kestrel (Falco sparverius)

The American kestrel (Falco sparverius) is a small raptor frequently admitted to wildlife rehabilitation centers, often due to traumatic injuries requiring surgical intervention. Regional anesthesia techniques, particularly brachial plexus blocks, may improve perioperative manage...

Habitat is more important than management for fruit-feeding butterfly assemblages in family-farm agricultural systems

Abstract Agricultural expansion is a primary cause of biodiversity decline, as it leads to habitat loss and fragmentation. In contrast, small organic systems or agroforestry are considered sustainable means of production. However, the impact of management class (conventional or o...

Radiometrically Equivalent Comparison of 254 nm Low-Pressure Mercury Lamps and InGaN 280 nm UV–C LEDs for Surface Disinfection

Abstract Ultraviolet germicidal irradiation (UVGI) is traditionally based on low-pressure mercury lamps emitting at 254 nm, whereas UV–C light-emitting diodes (LEDs) have emerged as promising mercury-free alternatives. However, direct comparisons between these technologies are fr...

Mental health problems as mediators between childhood trauma and cardiometabolic risk behaviours in the 2004 Pelotas Birth Cohort

BACKGROUND: Childhood trauma is associated with greater engagement in health risk behaviours (HRBs) that predispose to cardiometabolic disease. However, the mechanisms underlying these associations remain poorly understood. Mental health problems are hypothesised to mediate links...

Multifunctional NaNbO3: Photocatalytic Degradation of Methylene Blue and Intrinsic Antimicrobial Activity against Enterococcus faecalis and Candida albicans

Abstract In this paper, sodium niobate (NaNbO3) was synthesized by the microwave-assisted hydrothermal method at 150 °C for 70 min, followed by calcination at 550 °C for 2 h. X-ray diffraction revealed the coexistence of orthorhombic P21ma and Pbma phases, while scanning electron...