Universidade Tecnológica Federal do Paraná

Parallel Descriptive Assessments of Indoor Radon (2023) and Regional Hospital Cancer Registry Records (2003–2023) in Midwestern Santa Catarina, Brazil

Radon is an established environmental cause of lung cancer, but residential surveillance is limited in Brazil. This study comprised two complementary, analytically independent components: indoor radon monitoring in Caçador, and Hospital Cancer Registry records of tracheal, bronch...

Assessing the Potential of Gabiroba Fruit Waste as an Oil Source via Ultrasound-Assisted Extraction: Physicochemical Parameters, Chemical Profile, and Biological Properties

This study aimed to evaluate the impact of ultrasound-assisted extraction (UAE) on the chemical composition and biological activities of gabiroba waste oil (GWO), compared to conventional Soxhlet extraction (SE). GWO was characterized for carotenoid content and analyzed by GC-MS...

Insecticidal Activity of Essential Oils from Syzygium aromaticum and Foeniculum vulgare Var. dulce and Their Major Compounds Against Spodoptera frugiperda and Physiological Selectivity for Trichogramma pretiosum

Spodoptera frugiperda (Lepidoptera: Noctuidae) causes significant losses in major crops and is mainly controlled with chemical insecticides and genetically modified plants; however, improper use of these strategies has led to the development of resistant populations. We evaluated...

Sorption, desorption, and leaching of S-metolachlor in two soils amended with maize stover

S-metolachlor is widely used across various crops for its effectiveness as a grass herbicide and is considered pivotal, particularly amidst multiple cases of resistance in weed biotypes of the Poaceae family. In no-till systems, the presence of surface residues can modify herbici...

Integrated Robotic System for Autonomous Inspection of Power Transmission Lines Using Multimodal Perception and Reconfigurable Topologies

This paper presents an integrated robotic system for autonomous power transmission line inspection, evaluating three mechanical topologies–Line Walker, ModuClimber, and FlexRover–and a multimodal perception suite combining depth sensors. The comparative analysis reveals a distinc...

Shear‐Induced Network Organization and Enhanced Directional Electrical Transport in Blade‐Coated Single‐Walled Carbon Nanotubes Films

Single‐walled carbon nanotube (SWCNT) films are promising transparent conductors for flexible and optoelectronic devices, although achieving a suitable balance between optical transparency and electrical conductivity using scalable deposition methods remains challenging. Here, SW...

Aerated Facultative Lagoons Performance Bioaugmented With Bacillus Thuringiensis Immobilized On Rice Husks for Treatment of Cellulose Effluents

Abstract This study evaluated the performance of bench and pilot-scale facultative aerated lagoons (FAL) treating Kraft pulp effluents subjected to organic load shocks, with bioaugmentation of Bacillus thuringiensis NR114581.1 immobilized on rice husks. The effluents from the tre...

Solar-Powered Iron Electrocoagulation for Paracetamol Removal: Optimization, Colloidal Evidence, and Techno-Economic Assessment

Abstract The occurrence of paracetamol in water motivates the development of treatment processes that combine contaminant removal with reduced dependence on grid electricity. Iron-electrode electrocoagulation was optimized using a regulated direct-current power supply, a face-cen...

Computational Design of Three-Dimensional Nitrogenated Holey Graphene Structures with Phase-Dependent Optoelectronic Properties

Abstract In this work, we propose and comprehensively characterize two novel three-dimensional nitrogenated holey graphene (3D-NHG) structures, designated as the α and β phases. These architectures are predicted through a computational protocol based on the controlled compression...

The paradox of rankings: can higher education institutions lead the sustainable transition while simultaneously seeking global prestige?

Purpose This study aims to propose the model of tensions and paradoxes in leadership for university sustainability (MTPLUS), an integrative conceptual framework designed to explain, diagnose and support the governance of tensions that emerge between the pursuit of prestige in sus...

Temporal changes in estuarine water quality during decentralized wastewater treatment implementation in the Paranaguá estuarine system, southern Brazil

This study investigates the temporal response of estuarine water quality to progressive implementation of decentralized wastewater treatment systems (DWWTS) in Eufrasina, a traditional community within the Paranaguá Estuarine System (PES), southern Brazil. Monthly monitoring was...

Critical levels and sufficiency ranges of phosphorus in Pinus taeda plantations in southern Brazil

Pinus taeda plantations in South America have been cultivated on soils of low natural fertility, especially phosphorus (P), increasing the necessity for phosphate fertilisation. The proposition of critical levels (CL) and sufficiency ranges (SR) of P in the needles and soil in P....

From screen to purpose: meaningful IT work

Purpose This study investigates the dimensions that shape the meaning of work for Information Technology (IT) professionals in Rio Grande do Sul, Brazil, and analyzes the relationships among these dimensions, job satisfaction, and intention to remain in current roles. Design/meth...

Modal and Forced Vibration Analyses in a Railway Bridge considering Train-Track-Bridge Interaction

Abstract Purpose This work investigates the dynamic response and modal behaviour of a railway bridge subjected to moving loads by considering complex train-track-bridge interaction (TTBI) models. Methods The bridge structure, comprising simply supported concrete beams, is modelle...

Upcycling pharmaceutical capsules into porous activated carbon and activated carbon ash for efficient emerging contaminant removal

The management of pharmaceutical waste remains a significant challenge and presents opportunities for the development of value-added materials. In this study, discarded pharmaceutical gelatin capsules were converted into activated carbons and Ti-rich inorganic residues through se...

Optimizing the Production of a Condensed Tannin-Based Bioflocculant for Toxic Metal Remediation

Abstract Conventional water treatment typically employs chemical coagulants and flocculants, such as aluminum sulfate and iron salts. However, the intensive use of these products can lead to negative environmental impacts and pose significant health risks. In this context, bioflo...

Development of a model based on FMEA, AHP and 2-tuple fuzzy linguistic representation for supply risk assessment

Purpose This paper proposes a model based on analytic hierarchy process (AHP), 2-tuple fuzzy linguistic representation and failure mode and effect analysis (FMEA) to measure risks associated with suppliers of critical items. Design/methodology/approach In the proposed model, AHP...

Optimization of waste cooking oil biodiesel production via NaOH-catalyzed transesterification and dry washing using olive pit–derived activated carbon

Biodiesel production from waste cooking oil (WCO) represents both an economic opportunity and an environmental strategy to address global challenges related to renewable energy. Among available routes, alkaline transesterification remains the main process for converting vegetable...

Comparison of alkali-silica reaction mitigation between supersulfated cement and Portland cement

Deleterious alkali-silica reaction (ASR) in concrete occurs between alkaline ions and reactive minerals present in aggregates. Studies with Portland cement (PC) have shown that alumina can help form a protective film that surrounds the aggregate and hinders the dissolution of rea...

Green Chemistry Oriented Pluronic F127/Carbopol Nanogel Platform (NGLp) Encapsulating Lippia pedunculosa Essential Oil for Aedes aegypti Larval Control

Abstract Control of Aedes aegypti larvae is essential to reduce arbovirus transmission; however, increasing insecticide resistance and environmental concerns highlight the urgent need for sustainable alternatives. In this study, a solvent-free thermoresponsive nanogel (NGLp), bas...