A5065948329- Glass properties and applications
- Luminescence Properties of Advanced Materials
- Thermography and Photoacoustic Techniques
- Photoacoustic and Ultrasonic Imaging
- Pigment Synthesis and Properties
- Drug Solubulity and Delivery Systems
- Solid State Laser Technologies
- Essential Oils and Antimicrobial Activity
- Thermoelastic and Magnetoelastic Phenomena
- Radiation Shielding Materials Analysis
- Nuclear materials and radiation effects
- Ultrasonics and Acoustic Wave Propagation
- Advancements in Transdermal Drug Delivery
- Bee Products Chemical Analysis
- Fractional Differential Equations Solutions
- Phase-change materials and chalcogenides
- Phytochemistry Medicinal Plant Applications
- Calibration and Measurement Techniques
- Advanced Sensor Technologies Research
- Spectroscopy and Laser Applications
- Plant Toxicity and Pharmacological Properties
- Impact of Light on Environment and Health
- Sesquiterpenes and Asteraceae Studies
- Spectroscopy and Chemometric Analyses
- Surfactants and Colloidal Systems
Universidade Estadual de Ponta Grossa
2015-2024
Universidade Federal de Alagoas
2018-2021
Universidade Estadual de Maringá
2006-2011
Universidade Estadual de Mato Grosso do Sul
2008
In this study the relations among nonbridging oxygen (NBO), optical properties, basicity, and color center formation in CaO–MgO aluminosilicate glasses were studied. Samples containing (in mol %) 35.9–57.5 of CaO, 16–27.7 Al2O3, 7.9–41.6 SiO2, 6.5–6.9 MgO measured by absorption excitation, luminescence, Raman spectroscopy. The results showed that when SiO2 content was increased, edge shifted toward lower wavelengths bonds between O2− ions cations became more covalent. These observations...
Thermal diffusion and thermoelastic bending are two consequences of heating generated on the sample surface. Both employed in Open Photoacoustic Cell (OPC) technique to measure thermal diffusivity sample. In this work, we explore potential use OPC study effectiveness process photoacoustic signal (S) generation solids. More specifically, it is observed that if becomes more effective while thickness decreased, information can be used obtain a method self-check value parameter measured. The...
This study provides a comprehensive account of the various types calcium oxalate crystals found in genus Baccharis and assesses exceptional value crystal macropatterns for taxonomy genus. The morphotype, occurrence, chemical composition stems leaves are studied. 44 species included this were selected based on broad phylogeny-based sampling covering seven subgenera 31 sections. These chosen to represent all main phylogenetic lineages Baccharis; thus, also represents coverage concerning...
We present our recent achievements of a glass able to produce smart white light combining phosphor with emitting diodes (LEDs). The combined emissions Ce3+-doped calcium aluminosilicate and the 405 nm LED using Commission Internationale de l’Éclairage 1931 chromatic diagram showed that this system presents an emission close ideal allows tunability. In addition, blue overlaps spectral range retinal photoreceptors involved in circadian responses. This UV is suitable for lights therefore may...
This Letter reports the formation of ${\mathrm{Ti}}^{3+}$ in ${\mathrm{OH}}^{\ensuremath{-}}$ free aluminosilicate glass melted under vacuum condition, with a very long lifetime ($170\text{ }\text{ }\ensuremath{\mu}\mathrm{s}$) and broad emission band shifted towards visible region. value was attributed to trapping excited electrons by defects detrapping thermal energy, it is 2 orders magnitude higher than those published for doped materials. Our results suggest that this promising system...
In this work we present the spectroscopic assignments of ${\text{Ti}}^{3+}$ and ${\text{Ti}}^{4+}$ in titanium-doped ${\text{OH}}^{\ensuremath{-}}$ free low-silica calcium aluminosilicate glass influence structural defects on observed long lifetime high fluorescence intensity ions. Measurements were performed with electron-spin resonance (ESR), time resolved luminescence, ultraviolet-visible (UV-VIS) optical excitation emission spectra, conventional absorption photoconductivity. The ESR data...