A5068281788- Metabolomics and Mass Spectrometry Studies
- GABA and Rice Research
- Lichen and fungal ecology
- Spectroscopy and Chemometric Analyses
- Phytochemicals and Antioxidant Activities
- Biodiesel Production and Applications
- Biochemical Analysis and Sensing Techniques
- Meat and Animal Product Quality
- Plant Pathogenic Bacteria Studies
- X-ray Diffraction in Crystallography
- Essential Oils and Antimicrobial Activity
- Crystallization and Solubility Studies
- Natural Compound Pharmacology Studies
- Fatty Acid Research and Health
- Isotope Analysis in Ecology
- Plant Pathogens and Fungal Diseases
- Soybean genetics and cultivation
- Advanced Photocatalysis Techniques
- Phytochemistry Medicinal Plant Applications
- Geochemistry and Geologic Mapping
- Heavy Metals in Plants
- Chemical and Physical Properties in Aqueous Solutions
- Advanced Chemical Sensor Technologies
- Plant tissue culture and regeneration
- Food composition and properties
Universidade Federal de Mato Grosso do Sul
2016-2025
Centro Universitário da Cidade
2017
Universidade Federal de Goiás
2010-2013
Universidade Federal de São Carlos
2007-2009
Atranorin, lichexanthone, and the (+)-usnic, diffractaic, divaricatic, perlatolic, psoromic, protocetraric, norstictic acids isolated from lichens Parmotrema dilatatum (VAIN.) HALE, Usnea subcavata MOTYKA, sp., Ramalina Cladina confusa (SANT.) FOLMM. & AHTI, Dirinaria aspera HÄSÄNEN, lichexanthonicum ELIASARO ADLER were evaluated against UACC-62 B16-F10 melanoma cells 3T3 normal cells. Sulforhodamine B assay revealed significant cytotoxic activity in perlatolic on (50% growth inhibitory...
Huanglongbing (HLB) is one of the most severe diseases that affects citrus trees worldwide and associated with yet uncultured bacteria Candidatus Liberibacter spp. To assess metabolomic differences between HLB-asymptomatic -symptomatic tissues, extracts from leaf root samples taken a uniform 6-year-old commercial orchard Valencia were subjected to nuclear magnetic resonance (NMR) chemometrics. The results show symptomatic had higher sucrose content in their leaves no variation roots. In...
The problems related to organic deposition on pipeline walls are well-known and have been challenging the petroleum industry since primordial days. Some can result in a decrease of production rate or rise pumping power. Motivated by these problems, present work tried understand influence magnetic fields paraffin crystallization reduction crude oil viscosity. A mixture (C15−C58) was diluted n-hexane, solvent evaporated slowly, under 0.3 T field, also naturally, without fields. micrographs...
C-impregnated/Ta4+ self-doped ultrafine Ta2O5 nanoparticles (NPs) were prepared by a one-step solvothermal method through reaction of Ta(V) chloride with benzyl alcohol. These NPs showed large specific surface area 253.4 m2 g–1, mean diameter 2–3 nm, and superior photocatalytic activity in the photodegradation Rhodamine B dye (RhB), compared to TiO2 (P25) commercial NPs. The obtained materials annealed at different temperatures their structure, morphology optical properties investigated...
The protocetraric acid (1) is a depsidone produced by countless species of lichens and has shown potential biological activity. In this work, we evaluated through the sulforhodamine B (SRB) assay cytotoxic activity seven alkyl ether derivatives (9´-O-alkyl acid) against following cell lines: HT-29 (colon carcinoma), 786-0 (kidney MCF7 (breast HEP2 (laryngeal PC-03 (prostate B16F10 (murine melanoma), UACC-62 (human NIH/3T3 (mouse embryonic fibroblast). Most compounds were to tested cells,...
Recently, some works showed that magnetic fields may reduce the paraffin crystallization and viscosity of types oil. This Article shows main results obtained in an attempt to determine factors responsible for oil interaction with fields, which caused rheological properties change crude samples. Under influence a field (1.3 T 1 min exposure), one six brazilian samples studied (sample 1) 39% reduction on its viscoelastic (loss modulus storage modulus). However, other five did not show any...
In this work, it is proposed a methodology which allows to differentiate conventional and specific transgenic common beans, grown in greenhouse or under field conditions, based on modifications chemical composition using (1)H HR-MAS NMR. It demonstrated that the influence of typical variables from planting conditions had no significant ability set apart conventional. This was corroborated by multivariate data analysis NMR IR spectra. study also points out simplicity technique for food...
Xanthomonas axonopodis (Xac) bacterium causes one of the most feared and untreatable diseases in citriculture: citrus canker. To understand response mechanisms orange trees when attacked by Xac, leaves fruits Citrus sinensis were directly evaluated HRMAS NMR (high resolution magic angle spinning nuclear magnetic resonance) spectroscopy. This technique allows analysis samples without laborious pre-treatments also access to important information about chemical composition samples. The tree...
Pouteria glomerata is a native species from the Brazilian Pantanal, whose fruit edible and still underexploited. The objective of this study was to carried out chemical, nutritional antioxidant properties tropical fruit, as well isolate e characterize chemical strucutre their dietary fibers. DPPH ORAC methods were used determine capacity. Minerals quantified using inductively coupled plasma optical emission spectrometry. Soluble insoluble fiber fractions obtained by standard...
Bioregulatory substances, such as acetylcholine (ACh) and γ-aminobutyric acid (GABA), have shown promise in mitigating water deficit effects on plants. Their action plant physiology, particularly stomatal regulation osmoprotection, contributes to enhanced agricultural productivity. Regarding soybean plants, changes the metabolic profile that could justify improvement physiological performance growth are still unknown. This study investigated impact of combined ACh:GABA application during V4...
NMR (Nuclear Magnetic Resonance) spectroscopy is a well-established technique for elucidating the structure and composition of Natural Products (NP). However, while spectra offer qualitative insights, there often growing demand within NP research community quantitative analysis using techniques. Unfortunately, this sometimes met with misconceptions lacks methodological rigor typically associated analytical procedures, particularly concerning validation mandatory adjustments (qNMR)...
Fish oil dietary supplements have been linked to various health benefits due the high concentration of omega-3 polyunsaturated fatty acid (ω-3 PUFA). The potential use attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy with partial least squares regression (PLSR) was assessed determine docosahexaenoic (DHA), eicosapentaenoic (EPA), and ω-3 PUFA in commercial fish capsules taking as a reference 1H NMR values. Comparing results achieved by interval PLS (iPLS),...
The accumulation of proline is a typical physiological response to abiotic stresses in higher plants. 'Swingle' citrumelo, an important rootstock for citrus production, has been modified with mutated Δ(1)-pyrroline-5-carboxylate synthetase gene (VaP5CSF129A) linked the cauliflower mosaic virus 35S promoter induce overproduction free proline. This paper presents comparative metabolomic study nontransgenic versus transgenic citrumelo plants high endogenous (1)H high-resolution magic angle...