A5027172449- Glass properties and applications
- Luminescence Properties of Advanced Materials
- Spectroscopy and Chemometric Analyses
- Solid State Laser Technologies
- Identification and Quantification in Food
- Phase-change materials and chalcogenides
- Meat and Animal Product Quality
- Semiconductor Quantum Structures and Devices
- Thermography and Photoacoustic Techniques
- Advanced Chemical Sensor Technologies
- Thermal properties of materials
- Quantum and electron transport phenomena
- Biofuel production and bioconversion
- Quantum Dots Synthesis And Properties
- Milk Quality and Mastitis in Dairy Cows
- Photorefractive and Nonlinear Optics
- Spectroscopy and Quantum Chemical Studies
- Spectroscopy Techniques in Biomedical and Chemical Research
- Nonlinear Optical Materials Studies
- Semiconductor materials and devices
- Probiotics and Fermented Foods
- Chalcogenide Semiconductor Thin Films
- Semiconductor materials and interfaces
- Mineralogy and Gemology Studies
- Optical properties and cooling technologies in crystalline materials
Universidade Federal de Juiz de Fora
2016-2025
Université Laval
2019-2023
Universidade Federal do Rio de Janeiro
2023
Dr. Reddy's Laboratories (India)
2022
Centro de Ensino Superior de Juiz de Fora
2014
Universidade Estadual de Maringá
2006
Universidade de São Paulo
1994-2003
Universität Hamburg
2000
Universidade Estadual de Campinas (UNICAMP)
1998
Heavy usage of gasoline, burgeoning fuel prices, and environmental issues have paved the way for exploration cellulosic ethanol. Cellulosic ethanol production technologies are emerging require continued technological advancements. One most challenging is pretreatment lignocellulosic biomass desired sugars yields after enzymatic hydrolysis. We hypothesized that consecutive dilute sulfuric acid-dilute sodium hydroxide would overcome native recalcitrance sugarcane bagasse (SB) by enhancing...
We evaluated the potential application of Fourier-Transformed Infrared spectroscopy using Attenuated Total Reflectance (FTIR-ATR) to characterize and detect adulteration whey protein concentrate (WPC). Samples were adulterated by substituting WPC milk powder (MWP). Principal Component Analysis (PCA) was used spectra. Partial Least Squares (PLS) regressions applied model predict content amount in grams MWP samples. In WPC, Amide I II bands showed decreasing trend with The carbohydrate region...
Diminishing supplies of fossil fuels and oil spills are rousing to explore the alternative sources energy that can be produced from non-food/feed-based substrates. Due its abundance, sugarcane bagasse (SB) could a model substrate for second-generation biofuel cellulosic ethanol. However, efficient bioconversion SB remains challenge commercial production We hypothesized oxalic-acid-mediated thermochemical pretreatment (OAFEX) would overcome native recalcitrance by enhancing cellulase...
The present work reports the luminescence properties and laser operation of a Nd3+-doped (TeO2-ZnO) bulk tellurite glass. spectroscopic data are analyzed within framework Judd–Ofelt formalism results used in conjunction with fluorescence lifetime emission measurements to derive values for quantum efficiency stimulated cross section considered F43/2→I411/2 infrared transition around 1062.5 μm. Continuous-wave action is achieved first time this glass by pumping sample inside standard...
The present work was proposal the potential evaluation of Fourier-Transform Mid-Infrared (FT-MIR) associated with chemometric approach in green beans, order to discriminate origin special Arabica coffees a single state that has heterogeneous environments. Partial Least Squares Discriminant Analysis (PLS-DA) model presented as result: 3 latent variables, R2X (cum) = 0.892, R2Y 0.659; Q2Y 0.494, RMSEP 0.182387, p-value CV-Anova 0.009, 100% both sensitivity and specificity prediction...
This article presents a blend design methodology using real case study of Arabica and Robusta coffee blends, which are the primary species produced worldwide. is known for its superior sensory quality compared to Robusta, resulting in significant price differences. However, undisclosed mixtures between these after roasting grinding common market challenging detect, especially when beans added coffees claimed be 100% Arabica. Thus, this method proposes rapid reliable solution ensure...
Grape juice is popular for its taste and nutritional value, but due to high commercial it sometimes adulterated with apple juice, which contains naturally occurring sorbitol. This study used Fourier Transform Near-Infrared Spectroscopy (FT-NIR) alongside Artificial Neural Networks (ANN) detect sorbitol in grape aiming identify adulteration. Two key NIR spectral bands, 12400–7400 cm−1 6400–5500 cm−1, were strongly correlated concentration samples. The combination of FT-NIR ANN provided...
We use optical tweezers and atomic force microscopy to investigate the potential of rare earth elements be used as anticancer agents in development new chemotherapeutic drugs by characterizing binding three earths (ytterbium, neodymium, erbium) double-stranded DNA, which is one main targets for these inside cells. The presented a significant interaction with biopolymer buffers physiological relevance, typically very high equilibrium association constants (10 6 10 7 M −1 ) at DNA grooves....
We report on optical investigation of phosphate glasses doped with Yb2O3. UV–Vis and FT-NIR absorption, photoluminescence, time-resolved photoluminescence refractometry techniques are used. Cluster formation Yb3+ was not observed as well as, no evidence cooperative luminescence among Yb3+. An exponential decay the 2F5/2 → 2F7/2 lifetime ytterbium found when interionic distance decreases. The quantum efficiency laser performance were also investigated. Relatively high figure merit found, 0.33...