Institute of Physics

Anticorrosive Performance of Smart Epoxy Coatings With Poly(urea‐formaldehyde) Microcapsules Filled With 5‐Ethylidene‐2‐norbornene

In this study, poly(urea‐formaldehyde) (PUF) microcapsules filled with 5‐ethylidene‐2‐norbornene (ENB) were produced via in situ polymerization. The microcapsules were synthesized under nine different conditions, based on a sequential factorial design, and the optimal conditions...

Environmental performance of hydrogen production via eucalyptus biomass gasification and natural gas steam reforming: A life cycle assessment approach

A life cycle assessment (LCA) was conducted to compare hydrogen production via steam methane reforming (SMR) of natural gas and eucalyptus biomass gasification under Brazilian conditions. Three scenarios were evaluated for the production of 1 kg of hydrogen: (i) SMR, (ii) SMR wit...

Redefining Last Glacial Maximum environmental conditions in northeastern Brazil: pollen-based evidence of open and moist-adapted vegetation cover

Limited continuous continental records and complex climatic interactions hinder a comprehensive understanding of paleoclimatic and paleoenvironmental conditions during the Last Glacial Maximum (LGM) in the tropics. Adjacent to the currently semi-arid northeastern Brazil (NEB), a...

Explainable artificial intelligence for deep learning-based delamination detection in Carbon Fiber Reinforced Polymer composites

The heterogeneous and anisotropic nature of Carbon Fiber Reinforced Polymers (CFRP) introduces challenges in characterizing failure mechanisms, particularly delamination, in advanced composite engineering structures used across multiple industrial sectors. Although deep learning...

3D-printed polymeric cryogel for tetracycline adsorption

The removal of emerging contaminants from aqueous systems remains a significant environmental challenge. Among the adsorbent materials explored for water treatment, cryogels based on natural polymers have emerged as promising candidates due to their interconnected macroporous str...

Can Temperature and UV Exposure Alter the Antimicrobial Properties of the Essential Oils? An Investigation of Origanum vulgare , Cymbopogon citratus , Syzygium aromaticum , and Lippia sidoides

Abstract Essential oils (EOs) are natural compounds widely applied in agriculture, post-harvest preservation, food processing, and human health due to their strong antimicrobial potential. However, the effects of postextraction physical treatments on their chemical and biological...

Identifying medium-range structure response on cation- and anion-substitution modification effects in glassy arsenoselenides

Medium-range structure responses on cation- and anion-substitution modification effects are recognized in glassy arsenoselenides deviated from As 2 Se 3 stoichiometry due to pnictogen-type Ga co-doping or transition to chalcogen-optimized Se-Te-rich alloys employing X-ray powder...

Insight into phase-sensitive optical coherence tomography displacement measurement

Abstract Phase-sensitive optical coherence tomography (OCT) measures motion from phase differences between repeated acquisitions, supporting techniques such as Doppler OCT and optical coherence elastography (OCE). A recent numerical and experimental study showed that, even withou...

The organization and dynamics of viral factories

ABSTRACT Viral factories (VFs) are dynamic, virus-induced microcompartments that serve as centralized hubs in the host cell for viral genome replication, transcription, and virion assembly. These structures employ unique viral mechanisms for remodeling cellular architecture to cr...

Risk assessment of voltage violations during unintentional islanding events

The increasing penetration of distributed generators (DGs) has led to the proposal of fault ride-through (RT) requirements. These requirements enhance the reliability of the electrical system; however, reduce the sensitivity of anti-islanding protections, potentially exposing sen...

Fast adsorption of Mn2+ and Zn2+ on commercial LTA zeolite: kinetics, equilibrium, and preliminary reuse assessment

Abstract Commercial LTA-type zeolite was evaluated for the adsorption of Mn 2+ and Zn 2+ from aqueous solutions, with emphasis on the relationship between framework properties and adsorption behavior. Despite its very low BET surface area, the zeolite showed rapid and highly effi...

Modeling and Design Optimization of Looped Water Distribution Networks using MS Excel: Developing the Open-Source X-WHAT Model

Abstract Cost-effective water distribution network (WDN) design is crucial for reliable urban water supply. This paper introduces the open-source Excel for Water system Hydraulic Analysis Tool (X-WHAT) for WDN simulation and preliminary design. Unlike traditional spreadsheet appr...

Carvacrol thymol formulation: bactericidal activity without detectable early resistance induction in Gram-positive and Gram-negative bacteria

Abstract Aims The emergence of antimicrobial resistance requires alternative antimicrobial strategies capable of controlling bacterial growth while minimizing the risk of resistance selection. This study aimed to evaluate whether combinations of natural bioactive compounds, parti...

Instantaneous radiative forcings due to the first indirect effect linked to low-level liquid clouds in the Amazon

Abstract. Much of the present uncertainty in effective radiative forcing due to aerosol–cloud interactions (ERFaci) arises from aerosol–cloud adjustments. Nevertheless, estimating instantaneous radiative forcing due to aerosol–cloud interactions (IRFaci) remains important because...

A quadratic-scaling algorithm with guaranteed convergence for quantum coupled-channel calculations

Rigorous quantum dynamics calculations provide essential insights into complex scattering phenomena across atomic and molecular physics, chemical reaction dynamics, and astrochemistry. However, the application of the gold-standard quantum coupled-channel (CC) method has been fund...

Saturable absorption in NV-doped diamond studied by femtosecond Z-scan

Nonlinear optical absorption in commercially available diamond crystals containing nitrogen-vacancy (NV) centers is investigated using femtosecond open-aperture Z-scan measurements at a wavelength of 1032 nm. Experiments were performed on a high-purity electronic-grade diamond an...

On the effects of using nonlinear springs in mono-coupled periodic structures

Abstract Many strategies are employed to control structural vibration. One of them is to design structural elements in a periodic arrangement to obtain the so-called bandgap effect. For infinite periodic structures, bandgaps are defined as frequency ranges where waves do not prop...

Unveiling Float Glass Staining Induced by an Acid‐Cleaning Product

ABSTRACT Staining of glass facades is a recurring and significant problem worldwide. This study investigates the causes of staining observed on six laminated float glass samples from four manufacturers (α, β, γ, and δ). Samples from β, γ, and δ were new, whereas those from α (α 1...

Molecular and Supramolecular Pathways for CO 2 Separation Membranes: Amine‐Functionalized Silica and Hydrogen‐Bonded Organic Frameworks

Efficient CO 2 capture from flue gas is fundamentally limited by the trade‐off between permeability, selectivity, and chemical stability. Amine‐functionalized sorbents (AFS) achieve high selectivity via strong chemisorption, but suffer from kinetic limitations, pore blocking, and...