Universidade Estadual de Maringá

Effects of Drying on the Properties and Applications of Alkaline Corn Cob Lignin

Abstract Lignins are macromolecules obtained from plant biomass with great potential for high-value industrial applications. However, gaps remain regarding how lignin processing, particularly drying, affects its valorization. This study investigated how different drying technique...

Analysis of the Chemical Profile of the Essential Oil from Leaves and Cones of Four Varieties of Humulus lupulus Cultivated in a Subtropical Climate Under Edaphoclimatic Conditions

Cultivating Humulus lupulus L. under subtropical conditions is challenging because hops are adapted to temperate climates, where environmental factors influence plant development and secondary metabolism. This study evaluated the essential oil yield and chemical composition of co...

Bioactive Chitosan Membranes Loaded with Nile Tilapia Skin Peptides Promote Wound Healing Associated with Temporal Inflammatory Modulation

Abstract Bioactive wound dressings that combine structural support with local biological activity are promising for skin repair. Nile tilapia skin peptides (NTSP) have demonstrated wound-healing potential, while chitosan (CS) offers favorable film-forming, biodegradable, and woun...

Divergent Diagrams of Folds Associated with Reflections

Abstract We analyze divergent diagrams of k -fold map-germs at $$(\mathbb {C}^n,0)$$ ( C n , 0 ) , for $$k, n \ge 2,$$ k , n ≥ 2 , associated with reflections, adapting to the complex setting the theory of folds associated with involutions at $$(\mathbb {R}^n,0)$$ ( R n , 0 ) . I...

Influence of Extraction Technique and Solvent on the Recovery of Bioactive Compounds from Eugenia uniflora L. Fruits: Antioxidant, Antimicrobial, and UHPLC-MS/MS Characterization

Fruits of Eugenia uniflora L. are rich in phenolic compounds and flavonoids, highlighting their potential as a source of bioactive compounds for nutraceutical development; however, extraction conditions can substantially influence the chemical composition and biological activity...

Charting the life of Billboard hits through memory, turnover and predictability

Abstract Rankings shape the visibility and success of cultural products, yet their temporal dynamics remain underexplored when comparing distinct ranked objects within the same domain. Here, we use nearly seven decades of Billboard Hot 100 songs and six decades of Billboard 200 a...

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...

Demystifying Experimental Parameters in Optical Photothermal Imaging in Aqueous Media

Abstract Optical photothermal infrared (O-PTIR) spectroscopy is an indirect mid-infrared spectral imaging technique that enables label-free chemical analysis with submicrometer resolution. The technique is often used for analyzing cells and tissues and is discussed as capable of...

Sustainable Adsorbent Development: Tartrazine Dye Uptake by Banana-Peel-Activated Carbon

The excessive use of dyes by Brazilian industries has increased the generation of dye-containing effluents, highlighting the need for efficient treatment technologies. This study evaluated the removal of the food dye tartrazine using activated carbon produced from Cavendish banan...

Green synthesis of gold nanoparticles from Pfaffia glomerata extracts for enhanced electrode modification and antimicrobial applications

Gold nanoparticles (AuNPs) are widely used in pharmaceuticals, diagnostics, textiles, and energy. Plant extracts have become a promising green alternative for AuNP synthesis. Pfaffia glomerata (Brazilian ginseng) contains phenolics and saponins that serve as reducing and stabiliz...

Magnetic Hyperthermia for Cancer Therapy: Bridging Nanoparticle Physics, Field Engineering, and Tumor Biology

Magnetic hyperthermia (MH) is an emerging nanotheranostic strategy in which magnetic nanoparticles (MNPs) convert alternating magnetic-field (AMF) energy into localized heat for cancer treatment. This review examines how heat generation, nanoparticle design, field application, an...

Epoxidation of ent-pimara-8(14),15-dien-19-oic acid by whole cells of the endophytic fungus Aspergillus sclerotiorum

Abstract The diterpene ent -pimara-8(14),15-dien-19-oic acid ( 1 ) was converted into four oxidized diterpenes, 15,16-epoxy- ent -pimar-8(14)-en-19-oic acid ( 1a ), 15,16-epoxy-17-hydrxy- ent -pimar-8(14)-en-19-oic acid ( 1b ), 15,16-dihydroxy- ent -pimar-8(14)-en-19-oic acid ( 1...

Temporal dynamics of root penetration by Meloidogyne javanica and Pratylenchus brachyurus in soybean

Nematodes are major constraints to agricultural productivity in tropical countries. Despite the strong influence of infection dynamics on the efficiency of management strategies, there is scarce information about the rate at which these parasites penetrate plant roots. This study...

Efficacy of natural products in the control of Raoiella indica (Acari: Tenuipalpidae) in laboratory bioassays

Different concentrations of Sulfocal, Bioactive, and Fitoneem solutions were evaluated for their toxicity against female Raoiella indica (Hirst) (Acari: Tenuipalpidae). Coconut leaf discs were sprayed with the treatments and subsequently infested with adult females. Mortality was...

Experimental assessment of column rectangularity in flat‐slab slab–column connections

Abstract This paper presents an experimental investigation of the punching shear behavior of seven 3.00 m × 3.00 m × 0.20 m flat slabs without shear reinforcement, supported by internal rectangular columns. The column side lengths were varied to obtain aspect ratios, c max / c mi...

Cascading Biorefinery of Araucaria angustifolia Residues: From Biomass Characterization and Green Processing to High-Value Bioproducts

Araucaria angustifolia residues arise from a seasonal and geographically dispersed value chain. Brazilian pinhão production increased from 8393 t in 2015 to 13,493 t in 2024, corresponding to a theoretical 2699–2969 t of seed coats based on their 20–22% share of seed mass. No equ...

Oxygen-Vacancy-Controlled Band-Gap Engineering in Fe/Co Co-doped La-Modified Bismuth Titanate: Integrated Experimental and First-Principles Analysis

Abstract Layered Aurivillius ferroelectrics offer a route to multifunctional band-gap engineering, yet the role of oxygen vacancies in band-edge reconstruction in Fe/Co-modified compositions remains poorly resolved. Here, oxygen annealing of Bi3.25La0.75Ti2.60(Fe0.50,Co0.50)0.40O...

Economic and environmental trade-offs in the emerging lithium supply chain

Entering the global lithium market, characterized by strong demand and intense competition, poses significant challenges for Mexico; nevertheless, the country’s substantial lithium reserves create important opportunities for international integration and participation in global v...

Description of the Novel HLA‐B*18:272 Allele

ABSTRACT A novel HLA‐B allele was identified in a Brazilian volunteer bone marrow donor.

Sensitivity-Based Reference-Time Scaling for Local Orthogonalization of Fractional-Order Model Parameters

Fractional-order models are useful for describing systems with memory, anomalous relaxation, and non-classical dynamic behavior. However, parameter estimation in these models may be affected by strong covariance between the kinetic coefficient and the fractional order, reducing t...