A5061334729- Heavy Metals in Plants
- Plant Micronutrient Interactions and Effects
- Ginkgo biloba and Cashew Applications
- Proteins in Food Systems
- Agricultural pest management studies
- Phytochemicals and Antioxidant Activities
- Moringa oleifera research and applications
- Meat and Animal Product Quality
- Venomous Animal Envenomation and Studies
- Plant-Derived Bioactive Compounds
- Plant Stress Responses and Tolerance
- Heavy metals in environment
- Antioxidant Activity and Oxidative Stress
- Spectroscopy and Chemometric Analyses
- Edible Oils Quality and Analysis
- Cassava research and cyanide
- Microbial bioremediation and biosurfactants
- Nanoparticles: synthesis and applications
- Heavy Metal Exposure and Toxicity
- Phytase and its Applications
- Nicotinic Acetylcholine Receptors Study
- Nanocluster Synthesis and Applications
- Insect Utilization and Effects
- Agricultural economics and policies
- Carbon and Quantum Dots Applications
Universidade Federal do Piauí
2013-2024
University of Graz
2022
Universidade Estadual de Campinas (UNICAMP)
2014-2018
Buriti (Mauritia flexuosa L.) is a significant source of carotenoids, but these compounds have been extracted using laborious and low-effective methods. The present work evaluated the high-intensity ultrasound combined with chemometric approach to developing an optimal extraction method carotenoids from buriti pulp. multivariate optimization was carried out through two steps. First, simplex-lattice mixture design used optimize extractor solution finding higher yield (903 ± 21 µg g−1)...
Carotenoids are an essential component of cashew and can be used in pharmaceuticals, cosmetics, natural pigment, food additives, among other applications. The present work focuses on optimizing comparing conventional ultrasound-assisted extraction methods. Every optimization step took place with a 1:1 (w:w) mixture yellow red apples lyophilized ground cryogenic mill. A Simplex-centroid design was applied for both methods, the solvents acetone, methanol, ethanol, petroleum ether were...
In this paper, we present an empirical study conducted with the aim to identify evidence of construction scientific knowledge from Investigative Case Based Learning (ICBL) proposal in Instrumental Chemistry discipline higher education. Data were generated heuristic diagrams created by students solve investigative case (IC) and analyzed using Lakatos' Scientific Investigation Programs (SIP) methodology. analyzing diagrams, identified conceptual methodological aspects that are appropriate for...
An extraction method based on a multivariate analytical approach was developed for enhancement of the phenolic compounds in cashew nut extracts. The different extractor solvents (acetone, water, ethanol, and methanol) their binary, ternary, quaternary combinations were evaluated using simplex-centroid design surface response methodology. special cubic model exhibits no lack fit explains 89.2% variance. total measurements by Folin-Ciocalteu revealed highest values ethanol (5.93 mg GAE g-1)...
A gram-positive bacterium, denominated CFA-06, was isolated from Brazilian petroleum in the Campos Basin and is responsible for degradation of aromatic compounds fractions. The CFA-06 strain identified as Bacillus safensis using 16S rRNA gyrase B sequence. Enzymatic assays revealed presence two oxidoreductases: a catalase new oxidoreductase. oxidoreductases were enzymatically digested analyzed via ESI-LTQ-Orbitrap mass spectrometry. data novel oxidoreductase (named BsPMO) containing 224...
A composição de ácidos graxos seis amostras Orbignya phalerata diferentes cidades do estado Maranhão foi estudada.Os óleos foram extraídos utilizando extrator Soxhlet por duas metodologias e a avaliada cromatografia gasosa-espectrometria massas (CG-EM).O teor da fração lipídios revelou que o solvente usado influencia na extração, sendo maior porcentagem obtida com hexano.O variou 62,46-67,45%, predominância saturados (80,32-87,80%), principalmente ácido láurico (C12:0) percentual...
The improvements on aluminosilicates dissolution through microwave-assisted acid decomposition procedures for Na and Al quantification by inductively coupled plasma optical emission spectrometry (ICP OES) are reported here.Complete of the samples is achieved employing 4 mL HNO 3 3-4 HF thus reducing total amount these reactants in comparison with found literature.Additionally, type crucibles used calcination sample preparation step also evaluated.Na concentrations agreement expected values...
The fatty acid composition of six Orbignya phalerata samples different cities from Maranhão State (Brazil) was studied. oils were extracted by two methods using Soxhlet extractor and the evaluated gas chromatography-mass spectrometry (GC-MS) analysis. lipid fraction content showed that solvent used influences extraction, highest percent obtained with hexane. Lipid ranged 62.46-67.45%, predominance saturated acids (80.32-87.80%), mainly lauric (C12:0) 44.86 to 52.15%. Multivariate analysis...