Universidade Federal de Viçosa

Trema micrantha extract for sustainable spider mite management

Abstract Given the increasing demand for sustainable alternatives to synthetic acaricides, this study evaluated the acaricidal activity of aqueous leaf extracts of Trema micrantha Blume (Cannabaceae) against adult females of Tetranychus urticae Koch, 1836 (Acari: Tetranychidae) u...

eDNA-based assessment of microbial dynamics in response to persistent contaminants and degraded water quality in a hypereutrophic urban reservoir

Abstract Urban freshwater ecosystems are increasingly exposed to mixtures of pollutants, including per- and polyfluoroalkyl substances (PFAS). However, their ecological effects remain poorly understood, especially in tropical regions with limited sanitation infrastructure. This s...

Histological reorganization and spatiotemporal distribution of cell wall epitopes during somatic embryogenesis in oil palm (Elaeis guineensis Jacq.)

Abstract Somatic embryogenesis is a key strategy for the clonal propagation of elite oil palm ( Elaeis guineensis Jacq.) genotypes. Although several protocols have been established, the structural aspects underlying the induction of embryogenic callus in this species remain unkno...

Efficient speech denoising using CleanUNet optimized with Mamba and hybrid spectral loss

Abstract Speech enhancement aims to recover clean speech from signals degraded by noise and adverse acoustic conditions, such as background interference and echo. CleanUNet has emerged as an effective solution for causal speech denoising, but its high computational demands limit...

Recent Advances in Synthesis and Characterization of Niobium Catalysts: A Review

Niobium-based catalysts have emerged as highly adaptable materials for reactions under heterogeneous conditions, owing to significant advances achieved in synthetic methodologies and characterization strategies. In this review, special attention was paid to analyzing the main met...

On the Impact of Non-Stationary Spectral Noise in Satellite Image Restoration: A Spatial-Spectral Attention Benchmark

Multispectral satellite imagery from sensors like Sentinel-2 is essential for global earth observation but suffers from complex, non-stationary noise that varies across spatial coordinates and spectral channels. Traditional deep learning architectures frequently process multispec...

On the Impact of Non-Stationary Spectral Noise in Satellite Image Restoration: A Spatial-Spectral Attention Benchmark

Multispectral satellite imagery from sensors like Sentinel-2 is essential for global earth observation but suffers from complex, non-stationary noise that varies across spatial coordinates and spectral channels. Traditional deep learning architectures frequently process multispec...

Relationship between cardiometabolic alterations and frailty in Brazilian urban and rural older adults

Abstract Background Frailty is a major public health concern among older adults due to its association with disability, hospitalization, and mortality. Cardiometabolic alterations are prevalent in this population and may be associated with frailty. However, evidence remains limit...

Valorization of Ficus carica Pruning Residues as Selective Botanical Insecticides: Optimized Furanocoumarin Extraction, Efficacy Against Neotropical Stink Bugs, and Mechanistic Insights via Molecular Docking

ABSTRACT The Neotropical stink bugs Euschistus heros and Diceraeus melacanthus are major pests of soybean and maize in South America, yet current chemical control strategies face widespread resistance, highlighting the urgent need for sustainable alternatives. This study investig...