Dynamics of diffusion, evaporation, and retention of organic solvents in paints by unilateral NMR and HR-MAS NMR spectroscopy

Variable Selection Methods Applied in HTGC Data to Determine Physicochemical Properties of Crude Oils

“…Ribeiro et al applied PLS regression on GC data to estimate sensory attributes of Arabica coffee and OPS algorithm to improve the prediction by selecting peaks for some compounds (RIBEIRO; FERREIRA; SALVA, 2011). Besides that, OPS have been widely applied in data set from QSAR (quantitative structure-activity relationship) (ROQUE et al, 2019;FERREIRA, 2009), nuclear magnetic resonance (DE PAULO et al, 2020, 2023ROQUE et al, 2019), Raman (ROQUE et al, 2019FERREIRA, 2009), infrared (CALIARI et al, 2017FERREIRA et al, 2018;ROQUE et al, 2019;FERREIRA, 2009) 2009), andGC (RIBEIRO et al, 2012;ROQUE et al, 2019;FERREIRA, 2009) in pharmaceutical, food and fuel areas.…”

Dynamic laser speckle study on the effect of TiO2 and SiO2 nanoparticles in coatings

“…High-resolution magic angle spinning nuclear magnetic resonance (NMR) spectroscopy was employed to investigate the chemical compositions associated with the paint system. The proton NMR transverse relaxation time data facilitated the classification of four distinct ranges of molecular motion within the solvent/paint film [20]. Various data processing techniques offer supplementary insights into the determination of microparticle sizes within the 5 µm to 100 µm range, and correlation methods, employing distinct descriptors, provide valuable understanding regarding particle size [21].…”

HR-MAS DREAMTIME NMR for Slow Spinning ex Vivo and in Vivo Samples

“…Thus, HR-MAS NMR can be used to provide insight into molecular processes of compounds with restricted mobility, with increased spectral dispersion and sensitivity, that may otherwise be overlooked by traditional solution-state NMR. These analytes are often attributed to macromolecules and structural components in biological systems, , or small molecules that are either bound or distributed across multiple environments within a sample and thus broadened due to magnetic susceptibility distortions. , HR-MAS NMR has made immense contributions to understanding processes in many fields including medical research, , material sciences, , food sciences, , and environmental research. , …”

“…These analytes are often attributed to macromolecules and structural components in biological systems, 10,11 or small molecules that are either bound or distributed across multiple environments within a sample and thus broadened due to magnetic susceptibility distortions. 12,13 HR-MAS NMR has made immense contributions to understanding processes in many fields including medical research, 14,15 material sciences, 16,17 food sciences, 18,19 and environmental research. 20,21 Unfortunately, standard 1 H NMR has a relatively narrow chemical shift range that leads to considerable spectral overlap, especially for complex mixtures.…”