Institution
Universidade Federal de Viçosa
Recent research
- BiologyOpen access
Glycerol is a polyol that can be produced either chemically from oils or propylene, or biologically by yeasts, mainly under osmotic stress. Currently, glycerol is an abundant byproduct generated during biodiesel manufacturing that can be used as substrate in fermentative processe...
- Climate & EnvironmentOpen access
Revisiting climate extremes in South America and their modulation by oceanic teleconnections
Abstract This study characterizes spatiotemporal patterns of climate extremes in South America (SA) and assesses oceanic mode influences using daily MERGE and SAMeT data (2000–2024). Eight ETCCDI indices reveal a north–central precipitation gradient linked to the ITCZ, with dry s...
- BiologyOpen access
Silicon Use Efficiency and Response in Sugarcane Genotypes Under Greenhouse Conditions
Abstract Given the wide genetic variability of sugarcane ( Saccharum spp.) and the importance of silicon (Si) for this crop, this study aimed to assess the response of 50 genotypes to Si supply under greenhouse conditions, screening for genotypes with contrasting efficiency and r...
- BiologyOpen access
Abstract Atta robusta is a narrow endemic leaf-cutting ant restricted to restinga habitats along Brazil’s southeastern coast. Despite its conservation status, little is known about its evolutionary history and genetic structure. Here, we investigate patterns of genetic variation...
- BiologyOpen access
Haploid induction is a key step to obtain Zea mays doubled-haploids, which are homozygous lines in breeding programs. Genes are related to haploid induction, as mtl and dmp , and to phenotypic screening based on anthocyanin biosynthesis, as r1-nj and b1 . Despite their relevance,...
- Biology
Target spot of soybean is strongly influenced by weather, but the major drivers of epidemics remain poorly understood. Using a dataset obtained in non-treated plots of 254 trials conducted across nine Brazilian states over 13 growing seasons, we applied a distributed lag nonlinea...
- Biology
Pratylenchus brachyurus is a major plant-parasitic nematode that reduces soybean productivity, as most commercial cultivars are susceptible. In this context, Pochonia chlamydosporia has emerged as a promising biological control agent. We investigated the genotype-dependent respon...
- BiologyOpen access
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...
- Climate & EnvironmentOpen access
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...
- AI & ComputingOpen access
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...
- BiologyOpen access
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...
- Engineering & TechnologyOpen access
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...
- Engineering & TechnologyOpen access
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...
- Engineering & TechnologyOpen access
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...
- Health & MedicineOpen access
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...
- BiologyOpen access
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...