Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul

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...

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...

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...

Customer influence on value delivery in agricultural product development: the Brazilian farmers' perspective

Purpose This study aims to quantify the value delivery attributes of an innovative model of grain drying machine, focusing on its potential to enhance sustainability and efficiency in Brazilian agriculture. Design/methodology/approach This study employs a mixed-method approach, i...

Vitrification-Controlled Curing of Epoxidized Linseed Oil Resins: Kinetics, TTT Analysis, and Thermomechanical Performance with Anhydride and Amine Curing Agents

Abstract Epoxidized linseed oil (ELO) is a promising biobased alternative to petrochemical epoxy precursors, with a curing behavior strongly influenced by the chemistry of the curing agent and the resulting network architecture. In this study, ELO was synthesized via the Shi epox...

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...

Genomic detection of highly pathogenic avian influenza H5N1 in Antarctic seabirds reveals connectivity with South American viral lineages

Abstract Emerging avian viruses increasingly threaten Antarctic wildlife, raising concerns about ecosystem health and biodiversity. In this study, we conducted a comprehensive investigation of avian influenza virus (influenza A virus, IAV) in both resident and migratory birds inh...

Beyond the Bulk: Fraction-Specific Total Organic Carbon Profiling for Proactive Water Quality Management

Abstract Total organic carbon (TOC) is widely used to monitor water quality, but its value as a single metric is increasingly limited in water management. Bulk TOC does not distinguish organic fractions with different reactivities and associated risks, limiting its ability to pre...

Processes and Patterns of Dolomite Precipitation in Aptian Pre‐Salt Deposits of Santos Basin, Brazil

ABSTRACT The Aptian pre‐salt lacustrine carbonates represent the most significant oil exploration target along the South Atlantic margin. Dolomitization of the Santos Basin Barra Velha Formation (BVF) is critical for reservoir quality, yet its origin, patterns, and evolution rema...

Structure–Property–Durability Relationships in Grape-Derived Pectin/Kraft Lignin Films Before and After Accelerated UV Aging

Pectin films are promising renewable materials for biodegradable coatings; however, their high hydrophilicity and limited resistance to ultraviolet (UV) radiation restrict practical applications. This work investigated the influence of kraft lignin (0–5 wt%) on the structure–prop...

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...

Phenotypes of painful TMDs and bruxism based on clinical, psychosocial and somatosensory features: a cluster analysis

To identify pain phenotypes among individuals with bruxism and painful temporomandibular disorders (TMD) by integrating clinical, psychosocial, and somatosensory variables. This cross-sectional observational study included 54 adults who self-reported and were clinically assessed...