Exploració per autor "Macovez, Roberto"
Ara es mostren els items 12-31 de 48
-
Enhancement of the physical and chemical stability of amorphous drug-polymer mixtures via cryogenic comilling
Romanini, Michela; Lorente, Marta; Schammé, Benjamin; Delbreilh, Laurent; Dupray, Valérie; Coquerel, Gerard; Tamarit Mur, José Luis; Macovez, Roberto (American Chemical Society (ACS), 2018-11-27)
Article
Accés obertAmorphous dispersions of the Biclotymol antiseptic are obtained in polyvinylpyrrolidone (PVP), for different drug loadings, by comilling at temperatures below the glass transition of both components. Characterization of ... -
Eutectic mixture formation and relaxation dynamics of coamorphous mixtures of two benzodiazepine drugs
Valenti, Sofia; Cazorla Silva, Claudio; Romanini, Michela; Tamarit Mur, José Luis; Macovez, Roberto (Multidisciplinary Digital Publishing Institute (MDPI), 2023-01-01)
Article
Accés obertThe formation of coamorphous mixtures of pharmaceuticals is an interesting strategy to improve the solubility and bioavailability of drugs, while at the same time enhancing the kinetic stability of the resulting binary ... -
Formulation and characterization of mucoadhesive controlled release matrix tablets of captopril
Saurí, J.; Zachariah, Manesh; Macovez, Roberto; Tamarit Mur, José Luis; Millán, Daniel; Suñé Pou, M.; García Montoya, E.; Pérez Lozano, P.; Miñarro, M.; Ticó, J. R.; Suñé Negr, J. M. (2017-12-01)
Article
Accés obertThe purpose of this study is to characterize controlled release matrix tablets of captopril and to find out the physicochemical properties that have an effect on the mucoadhesion process. The hydrophilic matrix tablets ... -
Genuine antiplasticizing effect of water on a glass-former drug
Ruiz Tabbia, Guadalupe Natalia; Romanini, Michela; Hauptmann, Astrid; Loerting, Thomas; Shalaev, Evgenyi; Tamarit Mur, José Luis; Pardo Soto, Luis Carlos; Macovez, Roberto (Macmillan Publishers, 2017-08-07)
Article
Accés obertWater is the most important plasticizer of biological and organic hydrophilic materials, which generally exhibit enhanced mechanical softness and molecular mobility upon hydration. The enhancement of the molecular dynamics ... -
Glass transition, crystallization kinetics, and inter-conformer relaxation dynamics of amorphous mitotane and related compounds
Romanini, Michela; Pérez Valmaseda, Alex; Macovez, Roberto (Elsevier, 2022-12-15)
Article
Accés obertWe employ differential scanning calorimetry, broadband dielectric spectroscopy and optical microscopy to investigate the glass transition, molecular relaxation dynamics, and isothermal recrystallization kinetics of amorphous ... -
Hopping conductivity and polarization effects in a fullerene derivative salt
Macovez, Roberto; Zachariah, Manesh; Romanini, Michela; Zygouri, Panagiota; Gournis, Dimitrios; Tamarit Mur, José Luis (2014-06-12)
Article
Accés restringit per política de l'editorialImpedance spectroscopy is employed to probe the frequency-dependent conductivity and dielectric response of the C60O24Na 24 fulleride. The conduction properties of this organic material match the so-called universal behavior ... -
Inter-enantiomer conversion dynamics and Johari–Goldstein relaxation of benzophenones
Romanini, Michela; Macovez, Roberto; Tamarit Mur, José Luis (Nature, 2021-10-12)
Article
Accés obertWe employ temperature- and pressure-dependent dielectric spectroscopy, as well as differential scanning calorimetry, to characterize benzophenone and the singly-substituted ortho-bromobenzophenone derivative in the liquid ... -
Measurement of the dispersion of air and of refractive index anomalies by wavelength- dependent nonlinear interferometry
Macovez, Roberto; Mariano, Marina; Di Finizio, Sergio; Martorell Pena, Jordi (2009-07-27)
Article
Accés obertWe carry out wavelength-dependent second harmonic interference experiments using thin films of an organic dye as nonlinear optical sources. While the measured difference of refractive index between the fundamental and ... -
Mixtures of m-fluoroaniline with apolar aromatic molecules: Phase behaviour, suppression of H-bonded clusters, and local H-bond relaxation dynamics
Romanini, Michela; Barrio Casado, María del; Macovez, Roberto; Capaccioli, Simon; Tamarit Mur, José Luis (2019-12-15)
Article
Accés obertWe employ differential scanning calorimetry, IR spectroscopy, X-ray powder diffraction and dielectric spectroscopy to characterize binary mixtures of m-fluoroaniline (mFA), a rigid-molecule glass former, with two ... -
Molecular conformation in organic films from quantum chemistry ab initio calculations and second harmonic spectroscopy
Macovez, Roberto; López, Núria; Mariano, Marina; Maymó Camós, Marc; Martorell Pena, Jordi (2012-11-30)
Article
Accés restringit per política de l'editorialIdentifying molecular species and conformations at surfaces is of interest for both catalytic and biointerfacial research. Here, we present an extinction and second harmonic spectroscopy study of films of crystal violet ... -
Molecular diffusion and dc conductivity perfectly correlated with molecular rotational dynamics in a plastic crystalline electrolyte
Zachariah, Manesh; Romanini, Michela; Tripathi, Pragya; Tamarit Mur, José Luis; Macovez, Roberto (2015-01-01)
Article
Accés obert -
Molecular ¿(2) gratings via electron-beam lithography
Domínguez Juárez, Jorge Luis; Macovez, Roberto; Gonzalez, M.U.; Martorell Pena, Jordi (2010-07)
Article
Accés restringit per política de l'editorialWe show that the nonlinear optical activity of an organic molecule may be quenched by electron irradiation. Exploiting this effect, we inscribe periodic χ(2) patterns in the molecular films by means of a scanning electron ... -
New approaches for the fabrication of photonic structures of nonlinear optical materials
Carvajal, J J; Peña, A; Kumar, R.; Pujol, M. C.; Mateos, X.; Aguiló Díaz, Magdalena; Díaz, F; Vázquez De Aldana, J. R.; Méndez, Carlos Alberto; Moreno, P; Roso, L; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Král, Z; Ferré Borrull, J.; Pallarès Marzal, Josep; Marsal, L F; Finizio, Sergio Di; Martorell Pena, Jordi; Macovez, Roberto (2009-12)
Article
Accés restringit per política de l'editorialWe revisited two different strategies to fabricate 1D photonic crystals of nonlinear optical dielectric materials based on ultrafast laser ablation of the surface of an RbTiOPO4 crystal, and selective etching of ferroelectric ... -
Nose temperature and anticorrelation between recrystallization kinetics and molecular relaxation dynamics in amorphous morniflumate at high pressure
Romanini, Michela; Valenti, Sofia; Barrio Casado, María del; Tamarit Mur, José Luis; Macovez, Roberto; Rodríguez Martín, Sergio (2019-07-05)
Article
Accés obertWe probe the dielectric response of the supercooled liquid phase of Morniflumate, a drug with anti-inflammatory and antipyretic properties, studying in particular the pressure and temperature dependence of the relaxation ... -
On the microscopic origin of the cryoprotective effect in lysine solutions
Henao, Andrés; Ruiz Tabbia, Guadalupe Natalia; Steinke, Nicola; Cerveny Murcia, Silvina; Macovez, Roberto; Busch, Sebastian; McLain, Sylvia E.; Lorenz, Christian D.; Pardo Soto, Luis Carlos (2020-04-07)
Article
Accés obertThe amino acid lysine has been shown to prevent water crystallization at low temperatures in saturated aqueous solutions [S. Cerveny and J. Swenson, Phys. Chem. Chem. Phys., 2014, 16, 22382–22390]. Here, we investigate two ... -
Orientational relaxations in solid (1,1,2,2)tetrachloroethane
Tripathi, Pragya; Mitsari, Efstratia; Romanini, Michela; Serra, Pablo; Tamarit Mur, José Luis; Zuriaga, Jose Mariano; Macovez, Roberto (2016)
Article
Accés obertWe employ dielectricspectroscopy and molecular dynamic simulations to investigate the dipolar dynamics in the orientationally disordered solid phase of (1,1,2,2)tetrachloroethane. Three distinct orientational dynamics are ... -
Phase-selective conductivity enhancement and cooperativity length in PLLA/TPU nanocomposite blends with carboxylated carbon nanotubes
Valenti, Sofia; Yousefzade, Omid; Puiggalí Bellalta, Jordi; Macovez, Roberto (Elsevier, 2020-03-16)
Article
Accés obertTransmission electron microscopy, temperature-modulated differential scanning calorimetry, and broadband dielectric spectroscopy were employed to characterize ternary nanocomposites consisting of carboxylated carbon nanotubes ... -
Physical properties of organic fullerene cocrystals
Macovez, Roberto (2018-01-04)
Article
Accés obert -
Polymorphism with conformational isomerism and incomplete crystallization in solid ethanolamine
Romanini, Michela; Negrier, Philippe; Tripathi, Pragya; Gournis, Dimitrios; Lira, Kyriaki-Marina; Barrio Casado, María del; Pardo Soto, Luis Carlos; Tamarit Mur, José Luis; Macovez, Roberto (2019-09-25)
Article
Accés obertWe employ calorimetry, Rietveld refinement of X-ray powder diffraction, broadband dielectric spectroscopy and molecular dynamics simulations, to investigate the phase behavior, crystal structure, dc conductivity and ... -
Protonic surface conductivity and proton space-charge relaxation in hydrated fullerol
Mitsari, Efstratia; Romanini, Michela; Barrio Casado, María del; Tamarit Mur, José Luis; Macovez, Roberto (2017-03-09)
Article
Accés restringit per política de l'editorialThe ac dielectric properties of both anhydrous fullerol (C-60(OH)(24)) and hydrated fullerol with 20% water mass content are investigated by means of temperature-dependent dielectric spectroscopy. Anhydrous polycrystalline ...