A5086868617- Analytical chemistry methods development
- Electrochemical Analysis and Applications
- Mercury impact and mitigation studies
- Heavy metals in environment
- Pesticide Residue Analysis and Safety
- Mass Spectrometry Techniques and Applications
- Heavy Metal Exposure and Toxicity
- Advanced Chemical Sensor Technologies
- Radioactive element chemistry and processing
- Petroleum Processing and Analysis
- Trace Elements in Health
- Heavy Metals in Plants
- Analytical Chemistry and Chromatography
- Analytical Methods in Pharmaceuticals
- Environmental Toxicology and Ecotoxicology
- Analytical Chemistry and Sensors
- Probiotics and Fermented Foods
- Water Quality Monitoring and Analysis
- Spectroscopy and Chemometric Analyses
- Microencapsulation and Drying Processes
- Arsenic contamination and mitigation
- Catalytic Processes in Materials Science
- Meat and Animal Product Quality
- Ion-surface interactions and analysis
- Microbial Metabolites in Food Biotechnology
Universidade Federal de Santa Maria
2016-2025
Universidade Federal de Pelotas
2010-2024
Universidade Franciscana
2010-2023
Universidade Federal do Rio Grande do Sul
2020
American Chemical Society
2020
Laboratório Nacional de Ciência e Tecnologia do Bioetanol
2010-2018
National University of San Marcos
2016
Rede de Química e Tecnologia
2014
Zamorano Pan-American Agricultural School
2012
Universidade Federal de São Carlos
2010
Abstract: Sodium selenite (Na 2 SeO 3 ) is the selenium form used in composition of dietary supplements, and diphenyl diselenide (PhSe) an important intermediate organic synthesis, which increases risk human exposure to this chemical workplace. These compounds have been reported inhibit cerebral hepatic aminolevulinic acid dehydratase (ALA‐D) vitro , now we show that ascorbic can reverse some alterations caused by vivo exposure, but not ALA‐D inhibition. The effect Na or on distribution,...
Cancer and infectious diseases are among the leading causes of death in world. Despite diverse array treatments available, challenges posed by resistance, side effects, high costs, inaccessibility persist. In Solanaceae plant family, few studies with Vassobia breviflora species relating to biological activity known, but promising results have emerged. The phytochemicals present ethyl acetate fraction were obtained using ESI-MS-QTOF, antioxidants assays 1,1-diphenyl-2-picrylhydrazyl (DPPH),...
Ultrasonic waves can induce physical and chemical changes in liquid media via acoustic cavitation. Various applications have benefitted from utilizing these effects, including but not limited to the synthesis of functional materials, emulsification, cleaning, processing. Several books review articles public domain cover both fundamental applied aspects ultrasonics sonochemistry. The Editors Ultrasonics Sonochemistry journal possess diverse expertise this field, theoretical experimental...
In aquatic environments, heavy metals are produced from natural and anthropogenic sources the degree of contamination in fish tissues depend on pollutant type, species, sampling site, trophic level, their mode feeding. The metal concentration (Al, As, Cd, Co, Cr, Cu, Fe, Mn, Zn, Pb) water, sediment, liver two species (Oligosarcus spp. – carnivore Chyphocarax voga detritivore) was analyzed at sites Sinos River, Brazil, during four seasons. highest observed followed by lowest fish. As sediment...
Ultrasound-assisted oxidative desulfurization (UAOD) process was applied to diesel oil and petroleum product feedstock containing model sulfur compounds (benzothiophene, dibenzothiophene dimethyldibenzothiophene). The influence of oxidant amount, volume solvent for the extraction step time temperature ultrasound treatment (20 kHz, 750 W, operating at 40%) investigated. Using optimized conditions UAOD, removal up 99% achieved in using a molar proportion H2O2:acetic acid:sulfur 64:300:1, after...
Microparticles containing inulin, hi-maize, and trehalose were produced through spray drying to encapsulate Lactobacillus acidophilus La-5. Afterwards, the encapsulation efficiency, thermal resistance, gastrointestinal simulation, storage stability, microparticles’ size morphology analyzed evaluate protective effect against conditions of dryer different encapsulating matrices. Inulin hi-maize matrices showed greatest efficiency 93.12% 94.26%, respectively. Concerning matrix provided...
The viability of Lactobacillus acidophilus encapsulated in calcium alginate particles coated with up to three levels multilayer was analysed. Probiotic survival under simulated gastrointestinal conditions, thermal treatment and storage conditions were also investigated, as well the morphology mean particle size. encapsulation efficiency obtained higher than 80% all treatments, while diameter ranged from 107 μm 222 among different numbers layers. Microencapsulated L. presented during a layer...
With the development of new materials and recent requirements green chemistry, digestion remains a challenging step in many analytical procedures.
In this work, a comprehensive study was performed for the evaluation of ultrasound (US) frequency demulsification crude oil emulsions. Experiments were using ultrasonic baths operating at following frequencies: 25, 35, 45, 130, 582, 862 and 1146kHz. Synthetic water-in-oil emulsions with 12%, 35% 50% water medians droplet size distribution (DSD, D(0.5)) 5, 10 25μm prepared heavy (API density 19). Crude achieved frequencies in range 25-45kHz all tested When higher than 45kHz applied, no...
The effect of the antioxidant gallic acid (GA) on Pb toxicity in blood, liver and kidney was investigated present study. Rats Wistar received nitrate (50 mg/Kg/day, i.p., 5 days) followed by GA (13.5 mg/Kg, p.o., 3 or a chelating agent (EDTA, 55 i.p.). As result, decreased body weight, hematocrit blood δ-aminolevulinic dehydratase (ALA-D) activity. In addition, high levels were observed tissues, together with increased (1) lipid peroxidation erythrocytes, plasma (2) protein oxidation tissues...
The aim of this study was to investigate the influence hi-maize, inulin, and rice bran in survival Lactobacillus acidophilus LA-5 pectin microparticles obtained by internal gelation subjected freeze-drying. For this, development a matrix capable extending viability develop new functional foods emphasized. Microparticle size, encapsulation efficiency, probiotic survivability after gastrointestinal simulation, storage stability were analyzed. + inulin presented highest efficiency (68.1%)...