A5012001883- Heavy metals in environment
- Water Quality and Pollution Assessment
- Bee Products Chemical Analysis
- Analytical chemistry methods development
- Heavy Metals in Plants
- Electrochemical Analysis and Applications
- Insect and Pesticide Research
- Agricultural and Food Sciences
- Adsorption and biosorption for pollutant removal
- Essential Oils and Antimicrobial Activity
- Pharmaceutical and Antibiotic Environmental Impacts
- Plant and animal studies
- Dye analysis and toxicity
- Pharmacological Effects and Assays
- Phytochemistry Medicinal Plant Applications
- Heavy Metal Exposure and Toxicity
- Water Quality Monitoring and Analysis
- Spectroscopy and Chemometric Analyses
- Environmental Toxicology and Ecotoxicology
- Analytical Chemistry and Sensors
- Arsenic contamination and mitigation
- Electrochemical sensors and biosensors
- Pesticide Residue Analysis and Safety
- Phytochemistry and Biological Activities
- Recycling and Waste Management Techniques
Universidade Estadual do Centro-Oeste
2015-2024
Rede de Química e Tecnologia
2020
Secretaria de Planejamento e Gestão
2014
Universidade de Taubaté
2009
Universidade Estadual de Maringá
1997-2001
Universidade Federal de São Carlos
1999-2000
EXTRACT: AN ALTERNATIVE TO ETHANOLIC EXTRACT.Propolis is mostly used as hydroalcoholic extract.Recently there has been a growing number of patents dealing with new solvents for preparing propolis extracts.This study aimed to prepare edible oil extracts and compare their chemical composition biological activity ethanolic extracts.ESI-MS spectrophotometric methods were qualitative quantitative analyses, respectively.Antibacterial was evaluated by diffusion in agar.Cytotoxicity tested MTT assay...
To explore radiochemical differences and similarities between contaminated, intact, disturbed soils, specially for decision making regulating norms, it is important to establish Quality Reference Values (QRV) related natural radionuclides. In this work the 232Th, 238U, 40K contents their respective QRV were determined soils originated from basaltic lithology in an area of approximately 22,851 km² located State Paraná, Brazil. Sampling comprised seventy-two soil samples collected horizon A...
Objective . As propolis is a highly valued bee product, we aimed to verify the quality of aged propolis, investigating their phenolic and flavonoid composition, levels toxic metals, radical scavenging antimicrobial activities. Material Methods Samples fresh six different beekeepers, from same geographical location, were investigated in terms composition Pb, Cd, Cr, as well Results The two groups had similar qualitative by HPLC-PDA ESI(-)-MS. Fresh show no differences when average values...
A simple and fast analytical method for the determination of Cr, Pb Cd in brown sugar by GF AAS using slurry sampling was developed house validated first time. Analytical curves were prepared external standardization matrix simulation they linear. Low limits quantification Cr (32.8 ng g−1), (49.3 g−1) (4.5 found. Repeatability intermediate precision estimates (<10% <15%, respectively) recovery rates (95–103%) demonstrated a good accuracy. The levels samples ranged from <32.8 to 160 g−1 <49.3...
It is common for leather industries to dump chromium-contaminated effluent into rivers and other bodies of water. Thus, it crucial know the impacts caused by this practice environment. A study on chromium partitioning speciation, with determination at trace levels, was carried out in a potentially contaminated creek. Chromium fractionation speciation performed using flow-injection preconcentration system detection flame atomic absorption spectrometry. High levels element were found...
This study investigated the combined effects of commercial electroplating additives on properties nickel electrodeposits. Pieces carbon steel were electroplated in a Hull cell, using Watt's bath with different concentrations and times deposition according 25-1 fractional factorial design. Three response variables, namely brightness, roughness charge transfer resistance studied. Several synergistic antagonistic interactions between studied factors found briefly discussed physical basis....
Recently the use of brown sugar has increased due to its nutritional characteristics, thus requiring a more rigid quality control. The development method for water content analysis in soft is carried out first time by TG/DTA with application different statistical tests. results optimization study suggest that heating rates 5°C min(-1) and an alumina sample holder improve efficiency drying process. validation showed thermo gravimetry presents good accuracy precision samples. This technique...
Humans and environments are constantly exposed to a wide range of commercial products containing silver nanoparticles (AgNPs) in their composition. The hypothalamic-pituitary-testicular (HP-testicular) axis is sensitive low doses AgNPs with repercussions sperm functionality. oxidative stress may be related the pathogenesis alterations because Ag+ ions released from corporal fluids. This study aimed investigate effects AgNP exposure antioxidant defense system. For this, transcript expression...
17 α -Ethinyl estradiol (EE2), which is used worldwide in the treatment of some cancers and as a contraceptive, often found aquatic systems considered pharmaceutically active compound (PhACs) environment. Current methods for determination this compound, such chromatography, are expensive lengthy require large amounts toxic organic solvents. In work, voltammetric procedure developed validated screening tool detecting EE2 water samples without prior extraction, clean-up, or derivatization...
THE ITAIPU LAKE.This work was performed to evaluate the distribution of metals Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn in sediment surface Itaipu Lake-PR-Brazil.It also measurement pH, phosphorus, organic carbon particle size.In accordance international criteria quality sediment, results indicate an anthropogenic collaborations since some reached excessive values.The factor contamination used levels contamination.The Cu a moderate contamination, so that it's possible do harm balance ecosystem studied.
Abstract The study aimed to evaluate the antifungal potential of an extract propolis obtained with edible vegetable oil ( ODEP ) and identify compounds in this extract. Propolis sample was extracted canola oil. After filtration, oily liquid submitted solvent partition dried obtain , which tested vitro against C andida albicans strains. fractioned on Sephadex by high‐performance chromatography HPLC ). Active fractions and/or a pure compound were analyzed nuclear magnetic resonance,...