A5050435473- Oil Spill Detection and Mitigation
- Coastal and Marine Dynamics
- Marine and Offshore Engineering Studies
- Electrochemical sensors and biosensors
- Forensic Fingerprint Detection Methods
- Marine and coastal ecosystems
- Dental materials and restorations
- Coastal and Marine Management
- Coastal wetland ecosystem dynamics
- Biological Stains and Phytochemicals
- Advanced biosensing and bioanalysis techniques
- Ocean Waves and Remote Sensing
- Cultural Heritage Materials Analysis
- Maritime Navigation and Safety
- Analytical Chemistry and Sensors
- Advanced Wireless Communication Techniques
- Wood and Agarwood Research
- Engineering and Agricultural Innovations
- Surface Modification and Superhydrophobicity
- SARS-CoV-2 detection and testing
- Geological and Tectonic Studies in Latin America
- Public Health and Environmental Issues
- Dental Trauma and Treatments
- Geological formations and processes
- Biological Activity of Diterpenoids and Biflavonoids
Universidade Federal de Pelotas
2020-2025
Universidade Federal do Rio Grande
2017-2019
Surface (Brazil)
2014
Universidade de São Paulo
2010
The severe acute respiratory syndrome originated by the new coronavirus (SARS-CoV-2) that emerged in late 2019, known to be a highly transmissible and pathogenic disease, has caused COVID-19 global pandemic outbreak. Thus, diagnostic devices help epidemiological public safety measures reduce undetected cases isolation of infected patients, addition significantly control population’s immune response vaccine, are required. To address negative issues clinical research, we developed Diagnostic...
Flexible and wearable electrochemical biosensors are considered a non-invasive tool for monitoring biological substances, thus attracting attention due to the simple assembly, fast response, ultra-sensitivity, low cost. Among substances detected by methods, ascorbic acid (AA) stands out, as its presence in body promotes adequate physiological functions of immune, central nervous, circulatory systems, preventing treating various diseases. Herein, this work focuses on use nanostructured NdNiO3...
The purpose of this study was to investigate the effect atmospheric pressure plasma application on water contact angle (CA) zirconia ceramics. Two ceramics (Katana, Kuraray Noritake Dental and Lava, 3 M ESPE) were used test treatment (SAP, surface) with argon gas for one minute (1 L/min). To measure CA, a drop placed surface, which observed under optical microscopy, images calculate CA (n = 5). dynamic behavior surface wettability analyzed by collecting data over 70-hour period. two-way...
In this study, hybrid materials were synthesized incorporating curcumin, Cu2+ or Fe3+, and Kappa-carrageenan as a reducing agent to improve stability, considering that curcumin has low thermal solution which limits its applications. Colorimetric analysis showed color changes in the hybrids, ultraviolet–visible spectroscopy revealed band shifts infrared indicated wavenumbers, suggesting vibrational state of after bonding with metal ions. These techniques confirmed formation materials....
Abstract Due to the considerable importance of preventing and treating diseases, efficient detection methods are required monitor levels ascorbic acid (AA) in beverages, foods, dietary supplements, biological fluids. In this work, an efficient, easy handling, low cost, simple fabrication process for non‐enzymatic electrochemical sensors was fabricated through carbonization a graphene oxide filled biomass‐derived polymer poly(furfuryl alcohol) (PFA/GO), as sustainable alternative, using high...
This study investigated the influence of bioactive materials on dentin surface whitened. MATERIAL AND METHODS: Three bovine teeth were shaped into three wafers. Each wafer was then sectioned, six slices. One slice from each tooth distributed one 6 groups: 1.CG = control group (distilled water); 2.WT whitening treatment; 3.WT + MI Paste Plus, applied once a day; 4.WT Relief ACP30, day for 30 mintes; 5.WT ACP60, 60 minutes; 6.WT Biosilicate®, week. All groups treated over 14 days. RESULTS: CG...
Facing great obstacles to eradicate environmental hazards generated by oil spills, it is crucial establish actions against such accidents. In this context, the focus of study analyze spills at harbor region Rio Grande, Grande do Sul. The Easy Coupling Oil System (ECOS) model was used under different conditions simulated hydrodynamic Telemac-3D, with intention identify main forces controlling movement slicks over a year averaged from 2003 2015. computational domain comprises Patos Lagoon,...
Abstract Background Composites are materials that have multiple phases and attracted much attention as they able to improve physical chemical properties of an isolated material. In this sense, these composites commonly used key components for two purposes: coloring improving the operational properties; besides that, alternative synthesis routes respect principles green chemistry. Thus, reports development a new composite using natural products, indigo kaolinite, application in papilloscopy...
RESUMO O objetivo deste estudo foi caracterizar a produção de um carvão caroço pêssego e também avaliar adsorção corantes têxteis pelo ativado pêssego. A ativação do realizada utilizando cloreto zinco como agente oxidante. então utilizado na corantes, para posterior aplicação no tratamento efluente têxtil. Primeiramente, realizou-se com as temperaturas 500, 700 900°C tempo carbonização 10 15 20 minutos verificou-se remoção dos preto reativo 5 azul metileno. De acordo metodologia superfície...
To evaluate the effectiveness of nonthermal atmospheric plasma (NTAP) and priming on shear bond strength (SBS) a resin cement to two zirconia ceramics after 24 hours 1 year water storage.A total 120 plates (9 x 7 2 mm) were obtained from types (Katana, Kuraray Noritake; ZirCAD, Ivoclar Vivadent) randomly divided into 12 groups (n = 10 each). Zirconia ceramic submitted following treatments: (1) untreated (control); (2) treated with ZPrime Plus (Bisco Dental) primer; (3) NTAP (Surface Plasma...
A modelling system was utilised to simulate the movement and behaviour of oil slicks for two types hydrocarbons, a diesel another residual, considering hydrodynamic variations. Susceptible areas touching were found in adjacent regions vessel manoeuvring zones, one marine coastal an estuarine environment. The evaporation rates calculated estimate mass losses. For maritime zone, particles reached vicinity beaches approximately 4 8 hours after beginning spill simulations, while estuary 1 hour....
This study reports a route to obtaining novel and cost-effective rice husk-derived lignin/thiophene chalcone green composite for application in forensic science as fingermark developer through high energy milling. The material was properly characterized by UV-Vis, IR, fluorescence, X-ray diffraction scanning electron microscopy. product provided clear sharp images of latent fingermarks with minimal background staining, revealing all ridge details. Thus, the presented good performance...
In this study, hybrid materials were synthesized incorporating curcumin, Cu²⁺ or Fe³⁺, and Kappa-carrageenan as a reducing agent to improve its stability, considering that curcumin has low thermal solution which limits applications. Colorimetric analysis showed color changes in the hybrids, ultraviolet-visible spectroscopy revealed band shifts infrared indicated wavenumbers, suggesting vibrational state of after bonding with metal ions. These techniques confirmed formation materials....
A voltammetric sensor based on laser-induced graphene (LIG) for glyphosate detection in water, highlighting the electrode fabrication process, mechanism, and analytical performance.
The consumption pattern of the world population is based on derivatives petroleum, which despite contributing to improvement quality life, has negative aspects, mainly in environmental scope. number oil spills water slide increased significantly recent years. Considering complexity marine environment, present work aims apply a identification system dynamics and dispersion oil, using numerical modeling region Franceses Bridge, near Patos Lagoon-RS, Brazil. study hypothetical events leakage...
The global transportation of fossil fuels occurs mainly by sea and grows annually, along with the risks to marine ecosystems, especially in vicinity navigation routes. Numerical simulations able reproduce realistic oil spill scenarios can be utilised for planning risk mitigation actions. This study is based on simulating behaviour weathering rates recorded during first 24 h after an that occurred estuarine region. numerical system used ECOS (Easy Coupling Oil System) model coupled...
In recent years WiMAX has been presented by its promoters as a complete solution for the broadband access market. Since it is wireless technology, can easily serve most remote and difficult areas. Even more important, mobile version of added potential sustainable growth later adaptation all services to compete at fixed markets. This paper attempts analyze relevance WIMAX emerging markets where demand growing very fast pace, wireline infrastructures either do not exist or are in an...
A impossibilidade de eliminar riscos acidentes envolvendo o derramamento óleo, principalmente em zonas portuárias, ressalta a importância estabelecer protocolos para uma rápida ação contra estes eventuais desastres. Neste estudo foram simulados sessenta cenários eventos derrame óleo com diferentes condições ambientais na região portuária da cidade Rio Grande – RS, modelados pelo sistema numérico Telemac-3D + ECOS. O período simulação hidrodinâmica foi 365 dias, sendo este equivalente às...