A5053471083- Analytical chemistry methods development
- Pesticide Residue Analysis and Safety
- Electrochemical Analysis and Applications
- Heavy metals in environment
- Heavy Metals in Plants
- Botanical Research and Applications
- Atmospheric chemistry and aerosols
- Advanced battery technologies research
- Biodiesel Production and Applications
- Toxic Organic Pollutants Impact
- Spectroscopy and Laser Applications
- Analytical Chemistry and Chromatography
- Advanced Chemical Sensor Technologies
- Mass Spectrometry Techniques and Applications
- Electrocatalysts for Energy Conversion
- Water Quality and Pollution Assessment
- Heavy Metal Exposure and Toxicity
- Extraction and Separation Processes
- Mercury impact and mitigation studies
- Chemical Thermodynamics and Molecular Structure
- Pancreatitis Pathology and Treatment
- Pharmaceutical and Antibiotic Environmental Impacts
- Technical Engine Diagnostics and Monitoring
- Aluminum toxicity and tolerance in plants and animals
- Water Quality Monitoring and Analysis
Universidade Federal da Grande Dourados
2012-2024
Universidade Federal de Mato Grosso do Sul
2006-2024
Universidade Estadual Paulista (Unesp)
2008-2012
European Patent Organisation
2009
Departamento de Ciência e Tecnologia
2007-2008
The determination of Cd, Co, Cr, Cu, Fe, Na, Zn, and Pb by inductively coupled plasma-optical emission spectrometry (ICP OES) was performed on dry matter decoctions the medicinal plants Cordia salicifolia , Chiococca alba (L.) Hitchc., Echites peltata used as an appetite suppressant diuretic in Brazil. accuracy measurements analyzed spike recovery test. Results showed that concentration these seven metals (Cd, Zn) plant samples is below oral elemental impurities established United States...
Electrocatalytic production of H2O2 via a two-electron oxygen reduction reaction (ORR-2e-) is regarded as highly promising decentralized and environmentally friendly mechanism for the this important chemical commodity. However, underlying challenges related to development catalytic materials that contain zero or low content noble metals are relatively more active, selective, resistant long-term use have become huge obstacle electroproduction on commercial industrial scales. The present study...
In this study, two kinds of samples pyrolysis liquid were analyzed, one produced at laboratory and other acquired from a company that supplies agricultural inputs. The analyses carried out by gas chromatography with flame ionization detector (GC-FID) mass spectrometry (GC-MS). profiles corresponding to the are discussed. Syringol, 1,2,3-trimethoxybenzene, 2-metoxy-4-methylphenol, o-guaiacol 5-tert-butylpyrogalol most abundant substances in acid extract (pyroligneous + soluble tar)....
This study aimed to evaluate DNA damage in animal and plant cells exposed water from the Água Boa stream (Dourados, Mato Grosso do Sul, Brazil) by using bioassays, identify chemical compounds determine quality area. Through cytotoxicity bioassay with Allium cepa, micronucleus test, comet assay, Astyanax altiparanae fish, results indicated that biological samples were genetically altered. Micronuclei observed erythrocytes of A. after exposure locations close industrial waste discharge. The...
The essential oil obtained from the stem bark of Croton urucurana Baillon (Euphorbiaceae) was analysed by GC and GC-MS. 83 compounds were identified borneol (14.7%), bornyl acetate (5.2%), 1-isopropyl-7-methyl-4-methylene-1,3,4,5,6,8-hexahydro-2H-naphthalen-4a-ol sesquicineole (10.5%) gamma-gurjunene epoxide (5.4%) main components. EC50 value crude in DPPH free radical scavenging assay 3.21 mg mL-1. fraction that presented antioxidant activity purified prep-TLC on silica gel. GC-MS analysis...
The usefulness of molecular absorption was investigated for the determination total sulfur (S) in agricultural samples by high-resolution continuum source flame spectrometry. lines CS at 257.595, 257.958, and 258.056 nm SH 323.658, 324.064, 327.990 were evaluated. Figures merit, such as linear dynamic range, sensitivity, correlation, characteristic concentration, limit detection, precision, established. For selected lines, wavelength-integrated absorbance equivalent to 3 pixels, analytical...
Studies have reported a positive effect of prebiotics on the bioavailability iron. This study evaluated partially hydrolyzed guar gum (PHGG) iron absorption mechanisms in anemic rats. Male Wistar rats were fed 75g American Institute Nutrition Rodent Diets for growth, pregnancy and lactation (AIN93‐G) without three weeks order to induce deficiency anemia. Then they control diet (n = 12; fiber) or with 7.5% PHGG 12), both Food intake, body growth feed efficiency coefficient (FEC) measured. The...
The least-squares background correction (LSBC) and internal standardization procedures were combined to eliminate spectral interferences caused by the CS molecular band (251.602 nm) transport effects for determining Si in sulfuric acid digests of lubricant oil high-resolution continuum source flame atomic absorption spectrometry. Aluminum, Ba, Ti, V, W tested as standard (IS) candidates, provided best results. For absorbance measurements solutions containing 0.5–5.0 mg L−1 presence 25 (at...
Abstract Influence of different foliar fertilizers (phosphite, micronutrients, biostimulant, phosphite + micronutrients biostimulant and biostimulant) on yield sugarcane was evaluated after fertilization at 30, 90 150 days harvesting two-year-old sugarcane. The experiment carried out in a commercial crop employing randomized block design four replicates. Higher stalk masses were observed for 30 harvest, the higher content sucrose, total recoverable sugar Brix degrees fertilized days....
Metals are chemical contaminants that not normally biodegradable and accumulate in living organisms. In addition, they may present toxic effects to plants affect human health causing mutations adn damage of exposed The objective this study was evaluate the cytotoxicity, genotoxicity mutagenicity aluminum, manganese lead using A.cepa test. Solutions three concentrations with metals controls were prepared for genetic analyzes. seeds A. cepa germination, evaluation mutagenicity. results showed...
Internal standardization (IS) and dilute-and-shoot preparation of distilled alcoholic beverages were evaluated for the direct determination Cu by high-resolution continuum source flame atomic absorption spectrometry. Among Bi, In, Sn Te as internal standards, Bi furnished best results. Calibration curves built up plotting A(Cu)/A(Bi) A(Cu)/A(Te)versus concentration (0.05-4.0 mg L(-1)) linear correlation coefficients 0.9994 0.9990, respectively. Contents in 22 commercial analyzed proposed...
A DLLME sample preparation procedure was proposed and successfully applied to extract Ca, Mg, K, Na from renewable biodiesel sources followed by atomic spectrometric determination.
GRANDE, MS, BRAZIL.Two methods using headspace solid-phase microextraction and gas chromatography-mass spectrometry were developed for the determination of polycyclic aromatic hydrocarbons (PAH) BTEX.Best results obtained DVB/CAR/PDMS fiber, with 10 min extraction at 25 °C 0.15 desorption 260 (BTEX), PDMS/DVB 60 90 °C, 10% NaCl 5 270 (PAH).LOD intervals 3x10 -2 -5x10 µg L -1 (BTEX) 1.6x10 -3 -1.4 (PAH).The applied to forty-five groundwater samples from monitoring wells stations only benzene...