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Gámez F, Avilés-Moreno JR, Martens J, Berden G, Oomens J, Martínez-Haya B. Vibrational signatures of dynamic excess proton storage between primary amine and carboxylic acid groups. J Chem Phys 2024; 160:094311. [PMID: 38450729 DOI: 10.1063/5.0192331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 02/20/2024] [Indexed: 03/08/2024] Open
Abstract
Ammonium and carboxylic moieties play a central role in proton-mediated processes of molecular recognition, charge transfer or chemical change in (bio)materials. Whereas both chemical groups constitute acid-base pairs in organic salt-bridge structures, they may as well host excess protons in acidic environments. The binding of excess protons often precedes proton transfer reactions and it is therefore of fundamental interest, though challenging from a quantum chemical perspective. As a benchmark for this process, we investigate proton storage in the amphoteric compound 5-aminovaleric acid (AV), within an intramolecular proton bond shared by its primary amine and carboxylic acid terminal groups. Infrared ion spectroscopy is combined with ab initio Molecular Dynamics (AIMD) calculations to expose and rationalize the spectral signatures of protonated AV and its deuterated isotopologues. The dynamic character of the proton bond confers a fluxional structure to the molecular framework, leading to wide-ranging bands in the vibrational spectrum. These features are reproduced with remarkable accuracy by AIMD computations, which serves to lay out microscopic insights into the excess proton binding scenario.
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Affiliation(s)
- F Gámez
- Department of Physical Chemistry, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - J R Avilés-Moreno
- Department of Applied Physical Chemistry, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - J Martens
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - G Berden
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - J Oomens
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - B Martínez-Haya
- Center for Nanoscience and Sustainable Technologies (CNATS), Universidad Pablo de Olavide, 41013 Seville, Spain
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2
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Ortiz-Rivero E, Orozco-Barrera S, Chatterjee H, González-Gómez CD, Caro C, García-Martín ML, González PH, Rica RA, Gámez F. Light-to-Heat Conversion of Optically Trapped Hot Brownian Particles. ACS Nano 2023; 17:24961-24971. [PMID: 38048481 PMCID: PMC10754033 DOI: 10.1021/acsnano.3c07086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 11/09/2023] [Accepted: 11/09/2023] [Indexed: 12/06/2023]
Abstract
Anisotropic hybrid nanostructures stand out as promising therapeutic agents in photothermal conversion-based treatments. Accordingly, understanding local heat generation mediated by light-to-heat conversion of absorbing multicomponent nanoparticles at the single-particle level has forthwith become a subject of broad and current interest. Nonetheless, evaluating reliable temperature profiles around a single trapped nanoparticle is challenging from all of the experimental, computational, and fundamental viewpoints. Committed to filling this gap, the heat generation of an anisotropic hybrid nanostructure is explored by means of two different experimental approaches from which the local temperature is measured in a direct or indirect way, all in the context of hot Brownian motion theory. The results were compared with analytical results supported by the numerical computation of the wavelength-dependent absorption efficiencies in the discrete dipole approximation for scattering calculations, which has been extended to inhomogeneous nanostructures. Overall, we provide a consistent and comprehensive view of the heat generation in optical traps of highly absorbing particles from the viewpoint of the hot Brownian motion theory.
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Affiliation(s)
- Elisa Ortiz-Rivero
- Nanomaterials
for Bioimaging Group, Departamento de Física de Materiales,
& Instituto de materiales Nicolás Cabrera & Institute
for Advanced Research in Chemical Sciences,, Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Sergio Orozco-Barrera
- Universidad
de Granada, Nanoparticles Trapping
Laboratory, Research Unit Modeling Nature (MNat) and Department of
Applied Physics, 18071 Granada, Spain
| | - Hirak Chatterjee
- Universidad
de Granada, Nanoparticles Trapping
Laboratory, Research Unit Modeling Nature (MNat) and Department of
Applied Physics, 18071 Granada, Spain
| | - Carlos D. González-Gómez
- Universidad
de Granada, Nanoparticles Trapping
Laboratory, Research Unit Modeling Nature (MNat) and Department of
Applied Physics, 18071 Granada, Spain
- Universidad
de Málaga, Department of Applied
Physics II, 29071 Málaga, Spain
| | - Carlos Caro
- Biomedical
Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress
and Health-FPS, 41092 Sevilla, Spain
- Biomedical
Research Institute of Málaga and Nanomedicine Platform (IBIMA-BIONAND
Platform), University of Málaga, C/Severo Ochoa 35, 29590 Málaga, Spain
| | - María-Luisa García-Martín
- Biomedical
Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress
and Health-FPS, 41092 Sevilla, Spain
- Biomedical
Research Institute of Málaga and Nanomedicine Platform (IBIMA-BIONAND
Platform), University of Málaga, C/Severo Ochoa 35, 29590 Málaga, Spain
- Biomedical
Research Networking Center in Bioengineering, Biomaterials & Nanomedicine
(CIBER-BBN), 28029 Madrid, Spain
| | - Patricia Haro González
- Nanomaterials
for Bioimaging Group, Departamento de Física de Materiales,
& Instituto de materiales Nicolás Cabrera & Institute
for Advanced Research in Chemical Sciences,, Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Raúl A. Rica
- Universidad
de Granada, Nanoparticles Trapping
Laboratory, Research Unit Modeling Nature (MNat) and Department of
Applied Physics, 18071 Granada, Spain
| | - Francisco Gámez
- Department
of Physical Chemistry, Universidad Complutense
de Madrid, 28040 Madrid, Spain
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3
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Martínez-Haya B, Avilés-Moreno JR, Gámez F, Martens J, Oomens J, Berden G. Correlated proton dynamics in hydrogen bonding networks: the benchmark case of 3-hydroxyglutaric acid. Phys Chem Chem Phys 2023; 26:198-208. [PMID: 38053486 DOI: 10.1039/d3cp04514e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Proton and hydrogen-bonded networks sustain a broad range of structural and charge transfer processes in supramolecular materials. The modelling of proton dynamics is however challenging and demands insights from prototypical benchmark systems. The intramolecular H-bonding networks induced by either protonation or deprotonation of 3-hydroxyglutaric acid provide intriguing case studies of correlated proton dynamics. The vibrational signatures associated with the fluxional proton bonding and its coupling with the hydroxyglutaric backbone are investigated here with infrared action ion spectroscopy experiments and Born-Oppenheimer molecular dynamics (BOMD) computations. Despite the formally similar symmetry of protonated and deprotonated hydroxyglutaric acid, the relative proton affinities of the oxygen centers of the carboxylic and carboxylate groups with respect to that of the central hydroxyl group lead to distinct proton dynamics. In the protonated acid, a tautomeric arrangement of the type HOCO·[HOH]+·OCOH is preferred with the proton binding tighter to the central hydroxyl moiety and the electronic density being shared between the two nearly symmetric H-bonds with the carboxylic end groups. In the deprotonated acid, the asymmetric [OCO]-·HO·HOCO configuration is more stable, with a stronger H-bonding on the bare carboxylate end. Both systems display active backbone dynamics and concerted Grothuss-like proton motions, leading to diffuse band structures in their vibrational spectra. These features are accurately reproduced by the BOMD computations.
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Affiliation(s)
- Bruno Martínez-Haya
- Center for Nanoscience and Sustainable Technologies (CNATS), Universidad Pablo de Olavide, E-41013 Seville, Spain.
| | - Juan Ramón Avilés-Moreno
- Department of Applied Physical Chemistry, Universidad Autónoma de Madrid, E-28049, Madrid, Spain
| | - Francisco Gámez
- Departamento de Química Física, Universidad Complutense, E-28040 Madrid, Spain
| | - Jonathan Martens
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Jos Oomens
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Giel Berden
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
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4
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Paez-Muñoz JM, Gámez F, Fernández-Afonso Y, Gallardo R, Pernia Leal M, Gutiérrez L, de la Fuente JM, Caro C, García-Martín ML. Optimization of iron oxide nanoparticles for MRI-guided magnetic hyperthermia tumor therapy: reassessing the role of shape in their magnetocaloric effect. J Mater Chem B 2023; 11:11110-11120. [PMID: 37947078 DOI: 10.1039/d3tb01821k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Superparamagnetic iron oxide nanoparticles have hogged the limelight in different fields of nanotechnology. Surprisingly, notwithstanding the prominent role played as agents in magnetic hyperthermia treatments, the effects of nanoparticle size and shape on the magnetic hyperthermia performance have not been entirely elucidated yet. Here, spherical or cubical magnetic nanoparticles synthesized by a thermal decomposition method with the same magnetic and hyperthermia properties are evaluated. Interestingly, spherical nanoparticles displayed significantly higher magnetic relaxivity than cubic nanoparticles; however, comparable differences were not observed in specific absorption rate (SAR), pointing out the need for additional research to better understand the connection between these two parameters. Additionally, the as-synthetized spherical nanoparticles showed negligible cytotoxicity and, therefore, were tested in vivo in tumor-bearing mice. Following intratumoral administration of these spherical nanoparticles and a single exposure to alternating magnetic fields (AMF) closely mimicking clinical conditions, a significant delay in tumor growth was observed. Although further in vivo experiments are warranted to optimize the magnetic hyperthermia conditions, our findings support the great potential of these nanoparticles as magnetic hyperthermia mediators for tumor therapy.
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Affiliation(s)
- José María Paez-Muñoz
- Biomedical Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress and Health-FPS, Seville, Spain.
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND, C/ Severo Ochoa, 35, 29590 Málaga, Spain
| | - Francisco Gámez
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Yilian Fernández-Afonso
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Departamento de Química Analítica, Universidad de Zaragoza, C/ Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Roberto Gallardo
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND, C/ Severo Ochoa, 35, 29590 Málaga, Spain
| | - Manuel Pernia Leal
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, C/ Profesor García González 2, 41012 Seville, Spain
| | - Lucía Gutiérrez
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Departamento de Química Analítica, Universidad de Zaragoza, C/ Pedro Cerbuna 12, 50009, Zaragoza, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), Spain
| | - Jesús M de la Fuente
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), Spain
| | - Carlos Caro
- Biomedical Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress and Health-FPS, Seville, Spain.
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND, C/ Severo Ochoa, 35, 29590 Málaga, Spain
| | - María Luisa García-Martín
- Biomedical Magnetic Resonance Laboratory-BMRL, Andalusian Public Foundation Progress and Health-FPS, Seville, Spain.
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA Plataforma BIONAND, C/ Severo Ochoa, 35, 29590 Málaga, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), Spain
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5
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Fernandez-Rodriguez MA, Orozco-Barrera S, Sun W, Gámez F, Caro C, García-Martín ML, Rica RA. Hot Brownian Motion of Thermoresponsive Microgels in Optical Tweezers Shows Discontinuous Volume Phase Transition and Bistability. Small 2023; 19:e2301653. [PMID: 37158287 DOI: 10.1002/smll.202301653] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/03/2023] [Indexed: 05/10/2023]
Abstract
Microgels are soft microparticles that often exhibit thermoresponsiveness and feature a transformation at a critical temperature, referred to as the volume phase transition temperature. Whether this transformation occurs as a smooth or as a discontinuous one is still a matter of debate. This question can be addressed by studying individual microgels trapped in optical tweezers. For this aim, composite particles are obtained by decorating Poly-N-isopropylacrylamide (pNIPAM) microgels with iron oxide nanocubes. These composites become self-heating when illuminated by the infrared trapping laser, performing hot Brownian motion within the trap. Above a certain laser power, a single decorated microgel features a volume phase transition that is discontinuous, while the usual continuous sigmoidal-like dependence is recovered after averaging over different microgels. The collective sigmoidal behavior enables the application of a power-to-temperature calibration and provides the effective drag coefficient of the self-heating microgels, thus establishing these composite particles as potential micro-thermometers and micro-heaters. Moreover, the self-heating microgels also exhibit an unexpected and intriguing bistability behavior above the critical temperature, probably due to partial collapses of the microgel. These results set the stage for further studies and the development of applications based on the hot Brownian motion of soft particles.
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Affiliation(s)
- Miguel Angel Fernandez-Rodriguez
- Universidad de Granada, Nanoparticles Trapping Laboratory, Department of Applied Physics, Faculty of Sciences, Campus de Fuentenueva s/n, 18071, Granada, Spain
- Laboratory of Surface and Interface Physics, Department of Applied Physics, Faculty of Sciences, Universidad de Granada, Campus de Fuentenueva s/n, 18071, Granada, Spain
- Research Unit Modeling Nature (MNat), Universidad de Granada, Granada, Spain
| | - Sergio Orozco-Barrera
- Universidad de Granada, Nanoparticles Trapping Laboratory, Department of Applied Physics, Faculty of Sciences, Campus de Fuentenueva s/n, 18071, Granada, Spain
| | - Wei Sun
- Universidad de Granada, Nanoparticles Trapping Laboratory, Department of Applied Physics, Faculty of Sciences, Campus de Fuentenueva s/n, 18071, Granada, Spain
- Department of Physics, Yanshan University, Qinhuangdao, 066004, China
| | - Francisco Gámez
- Universidad de Granada, Nanoparticles Trapping Laboratory, Department of Applied Physics, Faculty of Sciences, Campus de Fuentenueva s/n, 18071, Granada, Spain
| | - Carlos Caro
- Department of Physical Chemistry, Faculty of Chemical Sciences, Complutense University of Madrid, 28040, Madrid, Spain
| | - María L García-Martín
- Department of Physical Chemistry, Faculty of Chemical Sciences, Complutense University of Madrid, 28040, Madrid, Spain
- Instituto de Investigación Bioméadica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), C/ Severo Ochoa, 35, 29590, Málaga, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), 28029, Madrid, Spain
| | - Raúl Alberto Rica
- Universidad de Granada, Nanoparticles Trapping Laboratory, Department of Applied Physics, Faculty of Sciences, Campus de Fuentenueva s/n, 18071, Granada, Spain
- Research Unit Modeling Nature (MNat), Universidad de Granada, Granada, Spain
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6
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Flores-Sánchez R, Bigorra-Mir M, Gámez F, Lopes-Costa T, Argudo P, Martín-Romero M, Camacho L, Pedrosa J. Interaction between acetylsalicylic acid and a cationic amphiphile model: An experimental approach using surface techniques. Chem Phys Lett 2023. [DOI: 10.1016/j.cplett.2023.140450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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7
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Martínez-Haya B, Avilés-Moreno JR, Gámez F, Martens J, Oomens J, Berden G. A Dynamic Proton Bond: MH +·H 2O ⇌ M·H 3O + Interconversion in Loosely Coordinated Environments. J Phys Chem Lett 2023; 14:1294-1300. [PMID: 36723385 PMCID: PMC9923742 DOI: 10.1021/acs.jpclett.2c03832] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
The interaction of organic molecules with oxonium cations within their solvation shell may lead to the emergence of dynamic supramolecular structures with recurrently changing host-guest chemical identity. We illustrate this phenomenon in benchmark proton-bonded complexes of water with polyether macrocyles. Despite the smaller proton affinity of water versus the ether group, water in fact retains the proton in the form of H3O+, with increasing stability as the coordination number increases. Hindrance in many-fold coordination induces dynamic reversible (ether)·H3O+ ⇌ (etherH+)·H2O interconversion. We perform infrared action ion spectroscopy over a broad spectral range to expose the vibrational signatures of the loose proton bonding in these systems. Remarkably, characteristic bands for the two limiting proton bonding configurations are observed in the experimental vibrational spectra, superimposed onto diffuse bands associated with proton delocalization. These features cannot be described by static equilibrium structures but are accurately modeled within the framework of ab initio molecular dynamics.
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Affiliation(s)
- Bruno Martínez-Haya
- Department
of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013 Seville, Spain
| | | | - Francisco Gámez
- Departamento
de Química Física, Universidad Complutense, 28040 Madrid, Spain
| | - Jonathan Martens
- Institute
for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Jos Oomens
- Institute
for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Giel Berden
- Institute
for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
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8
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Martín-Roca J, Horcajo-Fernández M, Valeriani C, Gámez F, Martínez-Pedrero F. Field-Pulse-Induced Annealing of 2D Colloidal Polycrystals. Nanomaterials (Basel) 2023; 13:397. [PMID: 36770358 PMCID: PMC9921439 DOI: 10.3390/nano13030397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Two-dimensional colloidal crystals are of considerable fundamental and practical importance. However, their quality is often low due to the widespread presence of domain walls and defects. In this work, we explored the annealing process undergone by monolayers of superparamagnetic colloids adsorbed onto fluid interfaces in the presence of magnetic field pulses. These systems present the extraordinary peculiarity that both the extent and the character of interparticle interactions can be adjusted at will by simply varying the strength and orientation of the applied field so that the application of field pulses results in a sudden input of energy. Specifically, we have studied the effect of polycrystal size, pulse duration, slope and frequency on the efficiency of the annealing process and found that (i) this strategy is only effective when the polycrystal consists of less than approximately 10 domains; (ii) that the pulse duration should be of the order of magnitude of the time required for the outer particles to travel one diameter during the heating step; (iii) that the quality of larger polycrystals can be slightly improved by applying tilted pulses. The experimental results were corroborated by Brownian dynamics simulations.
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Affiliation(s)
- José Martín-Roca
- Departamento de Estructura de la Materia, Física Térmica y Electrónica, Universidad Complutense de Madrid, 28040 Madrid, Spain
- GISC-Grupo Interdisciplinar de Sistemas Complejos, 28040 Madrid, Spain
| | | | - Chantal Valeriani
- Departamento de Estructura de la Materia, Física Térmica y Electrónica, Universidad Complutense de Madrid, 28040 Madrid, Spain
- GISC-Grupo Interdisciplinar de Sistemas Complejos, 28040 Madrid, Spain
| | - Francisco Gámez
- Departamento de Química-Física, Universidad Complutense de Madrid, 28040 Madrid, Spain
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9
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Avilés-Moreno JR, Gámez F, Berden G, Oomens J, Martínez-Haya B. Inclusion complexes of the macrocycle nonactin with benchmark protonated amines: aniline and serine. Phys Chem Chem Phys 2022; 24:8422-8431. [PMID: 35343526 DOI: 10.1039/d2cp00264g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The biological activity of the macrocycle nonactin is intimately related to its ionophore properties and ability to act as a selective cation carrier. While the focus of most investigations on nonactin has been on the binding of metal cations and small molecular ions, this study pursues the characterization of its inclusion complexes with primary amines with bulky structured side groups of different polarity. To this end, the complexes of nonactin with aniline and with the amino acid L-serine, both in protonated form, are considered as case studies and their relevant coordination arrangements are assessed by means of infrared action spectroscopy, quantum chemical density functional theory and Born-Oppenheimer molecular dynamics. The study suggests that the oxygen atoms from the oxolane (tetrahydrofuran) groups of nonactin constitute the preferential docking sites of the ammonium moiety of the guest cation, although conformational constraints promote interactions with the ester carbonyl backbone groups. In the aniline complex, the benzyl side ring is oriented outwards from the cavity, whereas in the case of L-serine, the side carboxylic acid and alcohol groups participate actively in the coordination process. Interestingly, the accommodation of L-serine is favoured when nonactin adopts an enantiomeric-selective folding, that promotes the tripodal coordination of the protonated amine group with oxolane rings from three nonactinic acid blocks with enantiomeric sequence (+)-(-)-(+), which allows for a facile coordination of the serine side groups. This is recognized as a general feature associated with the alternation of chiral domains in globally achiral natural nonactin, yielding mirror-symmetric complexes with the enantiomers of chiral amines.
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Affiliation(s)
| | - Francisco Gámez
- Departamento de Química Física, Universidad Complutense, 28040 Madrid, Spain
| | - Giel Berden
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Jos Oomens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Bruno Martínez-Haya
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013 Seville, Spain.
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10
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Christou E, Pearson JR, Beltrán AM, Fernández-Afonso Y, Gutiérrez L, de la Fuente JM, Gámez F, García-Martín ML, Caro C. Iron–Gold Nanoflowers: A Promising Tool for Multimodal Imaging and Hyperthermia Therapy. Pharmaceutics 2022; 14:pharmaceutics14030636. [PMID: 35336012 PMCID: PMC8955043 DOI: 10.3390/pharmaceutics14030636] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 02/26/2022] [Accepted: 03/11/2022] [Indexed: 12/17/2022] Open
Abstract
The development of nanoplatforms prepared to perform both multimodal imaging and combined therapies in a single entity is a fast-growing field. These systems are able to improve diagnostic accuracy and therapy success. Multicomponent Nanoparticles (MCNPs), composed of iron oxide and gold, offer new opportunities for Magnetic Resonance Imaging (MRI) and Computed Tomography (CT) diagnosis, as well as combined therapies based on Magnetic Hyperthermia (MH) and Photothermal Therapy (PT). In this work, we describe a new seed-assisted method for the synthesis of Au@Fe Nanoparticles (NPs) with a flower-like structure. For biomedical purposes, Au@Fe NPs were functionalized with a PEGylated ligand, leading to high colloidal stability. Moreover, the as-obtained Au@Fe-PEG NPs exhibited excellent features as both MRI and CT Contrast Agents (CAs), with high r2 relaxivity (60.5 mM−1⋅s−1) and X-ray attenuation properties (8.8 HU mM−1⋅HU). In addition, these nanoflowers presented considerable energy-to-heat conversion under both Alternating Magnetic Fields (AMFs) (∆T ≈ 2.5 °C) and Near-Infrared (NIR) light (∆T ≈ 17 °C). Finally, Au@Fe-PEG NPs exhibited very low cytotoxicity, confirming their potential for theranostics applications.
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Affiliation(s)
- Evangelia Christou
- BIONAND—Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía-Universidad de Málaga), C/Severo Ochoa, 35, 29590 Málaga, Spain; (E.C.); (J.R.P.)
| | - John R. Pearson
- BIONAND—Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía-Universidad de Málaga), C/Severo Ochoa, 35, 29590 Málaga, Spain; (E.C.); (J.R.P.)
| | - Ana M. Beltrán
- Departamento de Ingeniería y Ciencia de los Materiales y del Transporte, Escuela Politécnica Superior, Universidad de Sevilla, Virgen de Á frica 7, 41011 Sevilla, Spain;
| | - Yilian Fernández-Afonso
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain; (Y.F.-A.); (L.G.); (J.M.d.l.F.)
| | - Lucía Gutiérrez
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain; (Y.F.-A.); (L.G.); (J.M.d.l.F.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
| | - Jesús M. de la Fuente
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain; (Y.F.-A.); (L.G.); (J.M.d.l.F.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
| | - Francisco Gámez
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain;
| | - María L. García-Martín
- BIONAND—Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía-Universidad de Málaga), C/Severo Ochoa, 35, 29590 Málaga, Spain; (E.C.); (J.R.P.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
- Correspondence: (M.L.G.-M.); (C.C.)
| | - Carlos Caro
- BIONAND—Centro Andaluz de Nanomedicina y Biotecnología (Junta de Andalucía-Universidad de Málaga), C/Severo Ochoa, 35, 29590 Málaga, Spain; (E.C.); (J.R.P.)
- Correspondence: (M.L.G.-M.); (C.C.)
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11
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Gámez F, Avilés-Moreno JR, Berden G, Oomens J, Martínez-Haya B. Proton in the ring: spectroscopy and dynamics of proton bonding in macrocycle cavities. Phys Chem Chem Phys 2021; 23:21532-21543. [PMID: 34549205 DOI: 10.1039/d1cp03033g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The proton bond is a paradigmatic quantum molecular interaction and a major driving force of supramolecular chemistry. The ring cavities of crown ethers provide an intriguing environment, promoting competitive proton sharing with multiple coordination anchors. This study shows that protons confined in crown ether cavities form dynamic bonds that migrate to varying pairs of coordinating atoms when allowed by the flexibility of the macrocycle backbone. Prototypic native crown ethers (12-crown-4, 15-crown-5 and 18-crown-6) and aza-crown ethers (cyclen, 1-aza-18-crown-6 and hexacyclen) are investigated. For each system, Infrared action spectroscopy experiments and ab initio Molecular Dynamics computations are employed to elucidate the structural effects associated with proton diffusion and its entanglement with the conformational and vibrational dynamics of the protonated host.
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Affiliation(s)
- Francisco Gámez
- Department of Physical Chemistry, Universidad de Granada, Avenida de la Fuente Nueva s/n, 18071, Granada, Spain
| | - Juan R Avilés-Moreno
- Department of Applied Physical Chemistry, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Giel Berden
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Jos Oomens
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Bruno Martínez-Haya
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Ctra. de Utrera, km. 1, 41013 Seville, Spain.
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12
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Ximendes E, Marin R, Shen Y, Ruiz D, Gómez-Cerezo D, Rodríguez-Sevilla P, Lifante J, Viveros-Méndez PX, Gámez F, García-Soriano D, Salas G, Zalbidea C, Espinosa A, Benayas A, García-Carrillo N, Cussó L, Desco M, Teran FJ, Juárez BH, Jaque D. Infrared-Emitting Multimodal Nanostructures for Controlled In Vivo Magnetic Hyperthermia. Adv Mater 2021; 33:e2100077. [PMID: 34117667 DOI: 10.1002/adma.202100077] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 04/10/2021] [Indexed: 05/05/2023]
Abstract
Deliberate and local increase of the temperature within solid tumors represents an effective therapeutic approach. Thermal therapies embrace this concept leveraging the capability of some species to convert the absorbed energy into heat. To that end, magnetic hyperthermia (MHT) uses magnetic nanoparticles (MNPs) that can effectively dissipate the energy absorbed under alternating magnetic fields. However, MNPs fail to provide real-time thermal feedback with the risk of unwanted overheating and impeding on-the-fly adjustment of the therapeutic parameters. Localization of MNPs within a tissue in an accurate, rapid, and cost-effective way represents another challenge for increasing the efficacy of MHT. In this work, MNPs are combined with state-of-the-art infrared luminescent nanothermometers (LNTh; Ag2 S nanoparticles) in a nanocapsule that simultaneously overcomes these limitations. The novel optomagnetic nanocapsule acts as multimodal contrast agents for different imaging techniques (magnetic resonance, photoacoustic and near-infrared fluorescence imaging, optical and X-ray computed tomography). Most crucially, these nanocapsules provide accurate (0.2 °C resolution) and real-time subcutaneous thermal feedback during in vivo MHT, also enabling the attainment of thermal maps of the area of interest. These findings are a milestone on the road toward controlled magnetothermal therapies with minimal side effects.
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Affiliation(s)
- Erving Ximendes
- Nanomaterials for Bioimaging Group (nanoBIG), Universidad Autónoma de Madrid, Madrid, 28049, Spain
- IRYCIS, Ctra. Colmenar km. 9.100, Madrid, 28034, Spain
| | - Riccardo Marin
- Nanomaterials for Bioimaging Group (nanoBIG), Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Yingli Shen
- Nanomaterials for Bioimaging Group (nanoBIG), Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Diego Ruiz
- IMDEA Nanociencia, Faraday 9, Cantoblanco, Madrid, 28049, Spain
| | | | - Paloma Rodríguez-Sevilla
- Nanomaterials for Bioimaging Group (nanoBIG), Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Jose Lifante
- Nanomaterials for Bioimaging Group (nanoBIG), Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Perla X Viveros-Méndez
- Universidad Autónoma de Zacatecas, Unidad Académica de Ciencia y Tecnología de la Luz y la Materia, Carretera Zacatecas-Guadalajara km. 6, Ejido la escondida, Zacatecas, Zacatecas, 98160, México
| | - Francisco Gámez
- Department of Applied Physical Chemistry, Universidad Autónoma de Madrid, Francisco Tomás y Valiente, 7, Cantoblanco, Madrid, 28049, Spain
| | | | - Gorka Salas
- IMDEA Nanociencia, Faraday 9, Cantoblanco, Madrid, 28049, Spain
- Nanobiotecnología (IMDEA-Nanociencia), Unidad Asociada al Centro Nacional de Biotecnología (CSIC), Madrid, 28049, Spain
| | - Carmen Zalbidea
- IMDEA Nanociencia, Faraday 9, Cantoblanco, Madrid, 28049, Spain
- Department of Applied Physical Chemistry, Universidad Autónoma de Madrid, Francisco Tomás y Valiente, 7, Cantoblanco, Madrid, 28049, Spain
| | - Ana Espinosa
- IMDEA Nanociencia, Faraday 9, Cantoblanco, Madrid, 28049, Spain
- Nanobiotecnología (IMDEA-Nanociencia), Unidad Asociada al Centro Nacional de Biotecnología (CSIC), Madrid, 28049, Spain
| | - Antonio Benayas
- Nanomaterials for Bioimaging Group (nanoBIG), Universidad Autónoma de Madrid, Madrid, 28049, Spain
- IRYCIS, Ctra. Colmenar km. 9.100, Madrid, 28034, Spain
| | | | - Lorena Cussó
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, 28911, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, 28007, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, 28029, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Madrid, 28029, Spain
| | - Manuel Desco
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, 28911, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, 28007, Spain
- Unidad de Imagen Avanzada, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, 28029, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Madrid, 28029, Spain
| | - Francisco J Teran
- IMDEA Nanociencia, Faraday 9, Cantoblanco, Madrid, 28049, Spain
- Nanobiotecnología (IMDEA-Nanociencia), Unidad Asociada al Centro Nacional de Biotecnología (CSIC), Madrid, 28049, Spain
| | - Beatriz H Juárez
- IMDEA Nanociencia, Faraday 9, Cantoblanco, Madrid, 28049, Spain
- Department of Applied Physical Chemistry, Universidad Autónoma de Madrid, Francisco Tomás y Valiente, 7, Cantoblanco, Madrid, 28049, Spain
| | - Daniel Jaque
- Nanomaterials for Bioimaging Group (nanoBIG), Universidad Autónoma de Madrid, Madrid, 28049, Spain
- IRYCIS, Ctra. Colmenar km. 9.100, Madrid, 28034, Spain
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13
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Pysanenko A, Gámez F, Fárník M, Chalabala J, Slavíček P. Photochemistry of Amylene Double Bond in Clusters on Free Argon Nanoparticles. J Phys Chem A 2020; 124:3038-3047. [PMID: 32240587 DOI: 10.1021/acs.jpca.0c00860] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have investigated reactivity of double bond in 2-methyl-2-butene (also trimethylethylene or amylene) in the excited and ionized states. In a combined experimental and theoretical study, we focused on both the intermolecular and intramolecular reactions. In a molecular beam experiment, we have sequentially picked up several amylene molecules on the surface of argon nanoparticles ArM, M̅ ≈ 90, acting as a cold support. Ionization with 70 eV electrons yields mass spectra strongly dominated by amylene cluster ions Am(Am)n+. Interestingly, upon multiphoton ionization with 193 nm (6.4 eV) photons, a new strong fragment series appears in the spectra, nominally corresponding to an addition of two carbon atoms, i.e., (Am)nC2+. This difference between electron and photoionization suggests a reaction in an excited state of amylene with a neighboring amylene molecule. We used techniques of nonadiabatic molecular dynamics to study the reactivity of amylene molecules both in the excited and in ionized states. Possible reaction pathways are proposed, substantiating the observed differences between the electron ionization and photoionization mass spectra.
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Affiliation(s)
- Andriy Pysanenko
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejškova 3, 182 23 Prague, Czech Republic
| | - Francisco Gámez
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejškova 3, 182 23 Prague, Czech Republic
| | - Michal Fárník
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejškova 3, 182 23 Prague, Czech Republic
| | - Jan Chalabala
- University of Chemistry and Technology, 166 28 Prague, Czech Republic
| | - Petr Slavíček
- University of Chemistry and Technology, 166 28 Prague, Czech Republic
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14
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Flores-Sánchez R, Gámez F, Lopes-Costa T, Pedrosa JM. A Calixarene Promotes Disaggregation and Sensing Performance of Carboxyphenyl Porphyrin Films. ACS Omega 2020; 5:6299-6308. [PMID: 32258864 PMCID: PMC7114168 DOI: 10.1021/acsomega.9b03612] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Accepted: 01/29/2020] [Indexed: 06/11/2023]
Abstract
The aggregation of a free base porphyrin, meso-tetrakis(4-carboxyphenyl)porphyrin and its Zn(II) derivative have been studied at the air/water interface in the presence of a p-tert-butylcalyx[8]arene matrix. The mixed Langmuir films were obtained either by premixing the compounds (cospreading) or by sequential addition. The negative deviation from the additivity rule of the cospread films is indicative of a comparatively good miscibility that was further confirmed by Brewster angle microscopy. The images of the cospread mixed films showed a more homogeneous morphology in comparison with those of pure porphyrin that is attributed to a deeper and earlier self-aggregation state at the interface of the latter. These results were similar for both porphyrins and revealed the disaggregating effect of the calixarene matrix. The orientation and association of the porphyrins were studied by UV-visible reflection spectroscopy at the interface. A different aggregation behavior can be inferred from the resulting spectra, and a higher orientational freedom was observed when the molecules were less aggregated in mixed cospreaded films. The disaggregating effect was retained when the films were transferred to solid supports as demonstrated by UV-visible spectroscopy. Finally, the potential use of these Langmuir-Blodgett films as optical gas sensors was tested against ammonia and amine vapors. The changes in the spectrum in the presence of the volatile compounds are higher for the Zn-porphyrin. The presence of calixarene enhances the sensor response due to the higher accessibility of volatiles to disaggregated porphyrins in the mixed films. The resulting changes were mapped into a numerical matrix that can be transformed into a color pattern to easily discriminate among these gases.
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Affiliation(s)
- Rubén Flores-Sánchez
- Department
of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Seville 41013, Spain
| | - Francisco Gámez
- Department
of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Seville 41013, Spain
- Departamento
de Química Física Aplicada, Universidad Autónoma de Madrid, Francisco Tomás y Valiente 7, Madrid 28049, Spain
| | - Tânia Lopes-Costa
- Department
of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Seville 41013, Spain
| | - José María Pedrosa
- Department
of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Seville 41013, Spain
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15
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Trejos VM, Gámez F, Torres-Carbajal A, Martínez-Borquez A. Monte Carlo simulations and perturbation theory for highly correlated fluids: The Lennard-Jones core softened potential case. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112201] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Gámez F, Rodríguez-Almeida LF, Trejos VM. Thermodynamics of two-dimensional molecular fluids: Discrete perturbation theory and Monte Carlo simulations. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112293] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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17
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Avilés-Moreno JR, Gámez F, Berden G, Martens J, Oomens J, Martínez-Haya B. Multipodal coordination and mobility of molecular cations inside the macrocycle valinomycin. Phys Chem Chem Phys 2020; 22:19725-19734. [DOI: 10.1039/d0cp02996c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Small cations (K+, NH4+) occupy the center of the valinomycin cavity. Bulkier cations like H4PO4+ stretch the valinomycin backbone, which adopts barrel-like and funnel-like configurations, depending on the dynamically varying position of the cation.
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Affiliation(s)
| | - Francisco Gámez
- Department of Applied Physical Chemistry
- Universidad Autónoma de Madrid
- Madrid
- Spain
| | - Giel Berden
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525ED Nijmegen
- The Netherlands
| | - Jonathan Martens
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525ED Nijmegen
- The Netherlands
| | - Jos Oomens
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525ED Nijmegen
- The Netherlands
| | - Bruno Martínez-Haya
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- 41013 Seville
- Spain
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18
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Gámez F, Fernández JM, Moreno E, Tejeda G, Hernández MI, Montero S. Inelastic Collisions of O 2 with He at Low Temperatures. J Phys Chem A 2019; 123:8496-8505. [DOI: 10.1021/acs.jpca.9b06165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- F. Gámez
- Laboratory of Molecular Fluid Dynamics, Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, 28006 Madrid, Spain
- Departamento de Química Física Aplicada, Universidad Autónoma de Madrid, Francisco Tomás y Valiente 7, 28049 Madrid, Spain
| | - J. M. Fernández
- Laboratory of Molecular Fluid Dynamics, Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, 28006 Madrid, Spain
| | - E. Moreno
- Laboratory of Molecular Fluid Dynamics, Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, 28006 Madrid, Spain
| | - G. Tejeda
- Laboratory of Molecular Fluid Dynamics, Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, 28006 Madrid, Spain
| | - M. I. Hernández
- Instituto de Física Fundamental, IFF-CSIC, Serrano 123, 28006 Madrid, Spain
| | - S. Montero
- Laboratory of Molecular Fluid Dynamics, Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, 28006 Madrid, Spain
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19
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Pysanenko A, Gámez F, Fárníková K, Pluhařová E, Fárník M. Proton Transfer Reactions between Methanol and Formic Acid Deposited on Free ArN Nanoparticles. J Phys Chem A 2019; 123:7201-7209. [DOI: 10.1021/acs.jpca.9b05372] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andriy Pysanenko
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejškova 3, 182 23 Prague, Czech Republic
| | - Francisco Gámez
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejškova 3, 182 23 Prague, Czech Republic
| | - Karolína Fárníková
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejškova 3, 182 23 Prague, Czech Republic
| | - Eva Pluhařová
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejškova 3, 182 23 Prague, Czech Republic
| | - Michal Fárník
- J. Heyrovský Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejškova 3, 182 23 Prague, Czech Republic
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20
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Veiga-Fernández A, Joigneau Prieto L, Álvarez T, Ruiz Y, Pérez R, Gámez F, Ortega Abad V, Yllana F, De León-Luis J. Perinatal diagnosis and management of early-onset Marfan syndrome: case report and systematic review. J Matern Fetal Neonatal Med 2019; 33:2493-2504. [PMID: 30652519 DOI: 10.1080/14767058.2018.1552935] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Early onset Marfan syndrome is the most severe form of Marfan syndrome diagnosed during perinatal period. Early onset Marfan syndrome is associated with high mortality rates, usually within the first 2 years of life. First, we present a case of prenatally diagnosed early onset Marfan syndrome in a dichorionic diamniotic twin pregnancy, where suspicion was raised at 35 weeks of gestation. Ultrasound and fetal magnetic resonance imaging were used to assess prenatal findings in the affected fetus. She presented right diaphragmatic eventration, elongation of humerus and femur and subluxation of the crystalline lens. She died 3 months after birth. Secondly, we present a PubMed-based review of the published articles on early onset Marfan syndrome, with pre- or postnatal suspicion or diagnosis. We found 39 articles published between 1981 and 2017, arising information on 55 cases. Including ours, early onset Marfan syndrome was prenatally diagnosed in 34.54% of the cases. In these cases, the most frequent prenatal findings were cardiomegaly, dilatation of the great vessels and mitral or tricuspid regurgitation. Mortality rate during the first 15 months after birth was 73.68%. In the postnatally diagnosed cases, the most frequent findings were arachnodactyly, dilatation of the great vessels and mitral or tricuspid regurgitation. Mortality rate was 61.11%. Overall genetic confirmation was performed in 67.27% of the cases. Prenatal diagnosis of early onset Marfan syndrome is challenging but of utmost importance, since management should take place in a tertiary care center, by a multidisciplinary team. Differential diagnosis is essential in order to perform an adequate genetic counseling.
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Affiliation(s)
| | | | - Teresa Álvarez
- Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - Yolanda Ruiz
- Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - Ricardo Pérez
- Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - Francisco Gámez
- Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | | | - Fátima Yllana
- Hospital General Universitario Gregorio Marañón, Madrid, Spain
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21
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Gámez F, Pysanenko A, Fárník M, Ončák M. Ionization of carboxylic acid clusters in the gas phase and on free ArN and (H2O)N nanoparticles: valeric acid as a model for small carboxylic acids. Phys Chem Chem Phys 2019; 21:19201-19208. [DOI: 10.1039/c9cp03279g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In ionized valeric acid clusters, not only the expected proton transfer reaction, but also anhydride formation is observed. Could this be a common motif in the ionization chemistry of small carboxylic acid clusters?
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Affiliation(s)
- Francisco Gámez
- J. Heyrovský Institute of Physical Chemistry
- v.v.i., Czech Academy of Sciences
- Dolejškova 2155/3
- 182 23 Prague
- Czech Republic
| | - Andriy Pysanenko
- J. Heyrovský Institute of Physical Chemistry
- v.v.i., Czech Academy of Sciences
- Dolejškova 2155/3
- 182 23 Prague
- Czech Republic
| | - Michal Fárník
- J. Heyrovský Institute of Physical Chemistry
- v.v.i., Czech Academy of Sciences
- Dolejškova 2155/3
- 182 23 Prague
- Czech Republic
| | - Milan Ončák
- Institut für Ionenphysik und Angewandte Physik
- Universität Innsbruck
- A-6020 Innsbruck
- Austria
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22
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Martínez-Haya B, Avilés-Moreno JR, Gámez F, Berden G, Oomens J. Preferential host-guest coordination of nonactin with ammonium and hydroxylammonium. J Chem Phys 2018; 149:225101. [PMID: 30553267 DOI: 10.1063/1.5049956] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The biological activity of the macrocycle nonactin is intimately related to its ionophore properties and ability to act as a selective cation carrier. The competitive binding of small protonated amines constitutes a particularly key issue in the biochemistry of nonactin, which finds application in sensing and extraction technologies. In this study, isolated complexes of nonactin with ammonium and hydroxylammonium are investigated with infrared action spectroscopy and quantum chemical computations. The focus of the investigation is on the coordination achieved by the protonated guest with the oxygen atoms of either the oxolane groups or the carboxyl groups in the ester linkages of the macrocyle host and their relative contributions to the stability of the complexes. The experimental and computational data converge to a preferred coordination arrangement associated with a tight binding of the N-H δ+ bonds with the oxolane groups. In the N H 4 + complex, this results in a compact complex of S 4 symmetry. In contrast, symmetry is disrupted in the NH3OH+ complex, as it incorporates a bifurcated coordination of the -OH bond with a carbonyl group and an oxolane group of the host, involving also a more stretched arrangement of the nonactin backbone. These gas-phase conformations are in agreement with the structures postulated for these complexes in condensed phases, from previous Raman and crystallographic experiments.
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Affiliation(s)
- Bruno Martínez-Haya
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013 Seville, Spain
| | - Juan Ramón Avilés-Moreno
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013 Seville, Spain
| | - Francisco Gámez
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013 Seville, Spain
| | - Giel Berden
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED Nijmegen, The Netherlands
| | - Jos Oomens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED Nijmegen, The Netherlands
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23
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Trejos VM, Santos A, Gámez F. Vapor-liquid equilibrium and equation of state of two-dimensional fluids from a discrete perturbation theory. J Chem Phys 2018; 148:194505. [PMID: 30307191 DOI: 10.1063/1.5029375] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The interest in the description of the properties of fluids of restricted dimensionality is growing for theoretical and practical reasons. In this work, we have firstly developed an analytical expression for the Helmholtz free energy of the two-dimensional square-well fluid in the Barker-Henderson framework. This equation of state is based on an approximate analytical radial distribution function for d-dimensional hard-sphere fluids (1 ≤ d ≤ 3) and is validated against existing and new simulation results. The so-obtained equation of state is implemented in a discrete perturbation theory able to account for general potential shapes. The prototypical Lennard-Jones and Yukawa fluids are tested in its two-dimensional version against available and new simulation data with semiquantitative agreement.
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Affiliation(s)
- Víctor M Trejos
- Instituto de Química, Universidad Nacional Autónoma de México, Apdo. Postal 70213, Coyoacán, 04510 Ciudad de México, Mexico
| | - Andrés Santos
- Departamento de Física and Instituto de Computación Científica Avanzada (ICCAEx), Universidad de Extremadura, 060006 Badajoz, Spain
| | - Francisco Gámez
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013 Seville, Spain
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Vargas AP, Gámez F, Roales J, Lopes-Costa T, Pedrosa JM. An Optical Dosimeter for the Selective Detection of Gaseous Phosgene with Ultralow Detection Limit. ACS Sens 2018; 3:1627-1631. [PMID: 30160467 DOI: 10.1021/acssensors.8b00507] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We present here a cheap, fast, and highly selective dosimeter for the colorimetric detection of gaseous phosgene with an ultralow detection limit. The disposable device is based on Harrison's reagent supported into a porous nanocrystalline TiO2 matrix film. We exposed the films to phosgene streams while the absorbance was monitored by an optic fiber in a gas chamber. The pronounced spectral changes were unaffected by humidity and oxygen and permitted us to use the response rate at 464 nm as a very stable calibration signal for quantitative analysis purposes. The use of a specific sensing reaction guaranteed a very high selectivity of the device even against saturated vapors of primary interferences like halide gases and other oxidizing and volatile agents. With this simple method, whose response is compatible with affordable and efficient miniature LED-photodiode devices, we reach an ultralow limit of detection well below the ppm level.
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Affiliation(s)
- Alejandro P. Vargas
- Departament of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera Km. 1, 41013 Seville, Spain
| | - Francisco Gámez
- Departament of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera Km. 1, 41013 Seville, Spain
| | - Javier Roales
- Departament of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera Km. 1, 41013 Seville, Spain
| | - Tânia Lopes-Costa
- Departament of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera Km. 1, 41013 Seville, Spain
| | - José M. Pedrosa
- Departament of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera Km. 1, 41013 Seville, Spain
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Guillén MG, Gámez F, Suárez B, Queirós C, Silva AMG, Barranco Á, Sánchez-Valencia JR, Pedrosa JM, Lopes-Costa T. Preparation and Optimization of Fluorescent Thin Films of Rosamine-SiO2/TiO2 Composites for NO2 Sensing. Materials (Basel) 2017; 10:E124. [PMID: 28772484 PMCID: PMC5459166 DOI: 10.3390/ma10020124] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 01/23/2017] [Indexed: 01/05/2023]
Abstract
The incorporation of a prototypical rosamine fluorescent dye from organic solutions into transparent and microstructured columnar TiO2 and SiO2 (MO2) thin films, prepared by evaporation at glancing angles (GAPVD), was evaluated. The aggregation of the adsorbed molecules, the infiltration efficiency and the adsorption kinetics were studied by means of UV-Vis absorption and fluorescence spectroscopies. Specifically, the infiltration equilibrium as well as the kinetic of adsorption of the emitting dye has been described by a Langmuir type adsorption isotherm and a pseudosecond order kinetic model, respectively. The anchoring mechanism of the rosamine to the MO2 matrix has been revealed by specular reflectance Fourier transform infrared spectroscopy and infiltration from aqueous solutions at different pH values. Finally, the sensing performance towards NO2 gas of optimized films has been assessed by following the changes of its fluorescence intensity revealing that the so-selected device exhibited improved sensing response compared to similar hybrid films reported in the literature.
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Affiliation(s)
- María G. Guillén
- Departmento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, Sevilla 41013, Spain; (M.G.G.); (F.G.); (B.S.); (J.M.P.)
| | - Francisco Gámez
- Departmento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, Sevilla 41013, Spain; (M.G.G.); (F.G.); (B.S.); (J.M.P.)
| | - Belén Suárez
- Departmento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, Sevilla 41013, Spain; (M.G.G.); (F.G.); (B.S.); (J.M.P.)
| | - Carla Queirós
- REQUIMTE-LAQV, UCIBIO Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, R. Campo Alegre, Porto 4169-007, Portugal; (C.Q.); (A.M.G.S.)
| | - Ana M. G. Silva
- REQUIMTE-LAQV, UCIBIO Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, R. Campo Alegre, Porto 4169-007, Portugal; (C.Q.); (A.M.G.S.)
| | - Ángel Barranco
- Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla-CSIC, Américo Vespucio 49, Sevilla 41092, Spain; (Á.B.); (J.R.S.-V.)
| | - Juan Ramón Sánchez-Valencia
- Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla-CSIC, Américo Vespucio 49, Sevilla 41092, Spain; (Á.B.); (J.R.S.-V.)
| | - José María Pedrosa
- Departmento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, Sevilla 41013, Spain; (M.G.G.); (F.G.); (B.S.); (J.M.P.)
| | - Tânia Lopes-Costa
- Departmento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, Sevilla 41013, Spain; (M.G.G.); (F.G.); (B.S.); (J.M.P.)
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Avilés-Moreno JR, Gámez F, Berden G, Oomens J, Martínez-Haya B. Isolated alkali cation complexes of the antibiotic ionophore nonactin: correlation with crystalline structures. Phys Chem Chem Phys 2017; 19:14984-14991. [DOI: 10.1039/c7cp02438j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The stabilization of the nonactin–Na+ complex in a S4 or C2 conformation constitutes a challenging benchmark for experimental and modelling methods.
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Affiliation(s)
- Juan Ramón Avilés-Moreno
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- E-41013 Seville
- Spain
| | - Francisco Gámez
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- E-41013 Seville
- Spain
| | - Giel Berden
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525ED Nijmegen
- The Netherlands
| | - Jos Oomens
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525ED Nijmegen
- The Netherlands
| | - Bruno Martínez-Haya
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- E-41013 Seville
- Spain
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Mora-Boza A, Lopes-Costa T, Gámez F, Pedrosa JM. Unveiling the interaction of DNA–octadecylamine at the air–water interface by ultraviolet-visible reflection spectroscopy. RSC Adv 2017. [DOI: 10.1039/c6ra27903a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this work, ultraviolet-visible reflection spectroscopy is proposed as a technique that, in combination with classical surface pressure–area isotherms, allows to study in situ the adsorption of DNA to octadecylamine monolayers.
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Affiliation(s)
- A. Mora-Boza
- Department of Physical, Chemical and Natural Systems
- Universidad Pablo de Olavide
- 41013 Seville
- Spain
| | - T. Lopes-Costa
- Department of Physical, Chemical and Natural Systems
- Universidad Pablo de Olavide
- 41013 Seville
- Spain
| | - F. Gámez
- Department of Physical, Chemical and Natural Systems
- Universidad Pablo de Olavide
- 41013 Seville
- Spain
| | - J. M. Pedrosa
- Department of Physical, Chemical and Natural Systems
- Universidad Pablo de Olavide
- 41013 Seville
- Spain
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Affiliation(s)
- Francisco Gámez
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Seville, Spain
| | - Santiago Lago
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Seville, Spain
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García C, Álvarez T, Bravo C, Pérez-Caballero R, Viadero MT, Gámez F, Pérez R, De León-Luis J. Prenatal Diagnosis of an Aortopulmonary Window With an Interrupted Aortic Arch. J Ultrasound Med 2016; 35:2087-2093. [PMID: 27503753 DOI: 10.7863/ultra.15.11021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 01/25/2016] [Indexed: 06/06/2023]
Abstract
A prenatal aortopulmonary window with an interrupted aortic arch was detected in a 22-week-old fetus. The 3-vessel and trachea view showed a communication between the ascending aorta and the pulmonary artery. Early postnatal surgery was successful. A PubMed-based search identified all cases of prenatal aortopulmonary windows between 2002 and 2015. Nine articles were identified. The average gestational age at diagnosis was 28 weeks (range, 22-33 weeks). The most frequent aortopulmonary window was type I (40%). All cases were associated with congenital heart defects, mainly an interrupted aortic arch (50%). No chromosomal or extracardiac abnormalities were seen. Prenatal echocardiography is useful for early diagnosis of an aortopulmonary window. The prognosis depends on the time of surgery and the nature of the associated anomalies.
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Affiliation(s)
- Cecilia García
- Department of Obstetrics and Gynecology, Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain
| | - Teresa Álvarez
- Department of Pediatric Cardiology, Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain
| | - Coral Bravo
- Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain
| | - Ramón Pérez-Caballero
- Department of Pediatric Cardiac Surgery, Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain
| | - María Teresa Viadero
- Department of Pediatric Cardiology, Hospital Marqués de Valdecillas, Santander, Spain
| | - Francisco Gámez
- Department of Obstetrics and Gynecology, Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain
| | - Ricardo Pérez
- Department of Obstetrics and Gynecology, Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain
| | - Juan De León-Luis
- Department of Obstetrics and Gynecology, Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain
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Bravo C, Gámez F, Pérez R, Álvarez T, De León-Luis J. Fetal Aortic Arch Anomalies: Key Sonographic Views for Their Differential Diagnosis and Clinical Implications Using the Cardiovascular System Sonographic Evaluation Protocol. J Ultrasound Med 2016; 35:237-251. [PMID: 26715656 DOI: 10.7863/ultra.15.02063] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 05/23/2015] [Indexed: 06/05/2023]
Abstract
Aortic arch anomalies are present in 1% to 2% of the general population and are commonly associated with congenital heart disease, chromosomal defects, and tracheaesophageal compression in postnatal life. The sonographically based detection of aortic arch anomalies lies in the 3-vessel and trachea view. Although highly sensitive, this view alone does not allow identification of the aortic arch branching pattern, which prevents an accurate diagnosis. The systematic addition of a subclavian artery view as part of a standardized procedure may be useful in the differential diagnosis of these conditions. We describe the sonographic assessment of fetal aortic arch anomalies by combining 2 fetal transverse views: the 3-vessel and trachea view and the subclavian artery view, which are included in the cardiovascular system sonographic evaluation protocol. We also review the sonographic findings and the clinical implications of fetal aortic arch anomalies.
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Affiliation(s)
- Coral Bravo
- Departments of Obstetrics and Gynecology (C.B.A., F.G., R.P., J.D.L.-L.) and Pediatric Cardiology (T.Á.), Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain; and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.A.)
| | - Francisco Gámez
- Departments of Obstetrics and Gynecology (C.B.A., F.G., R.P., J.D.L.-L.) and Pediatric Cardiology (T.Á.), Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain; and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.A.)
| | - Ricardo Pérez
- Departments of Obstetrics and Gynecology (C.B.A., F.G., R.P., J.D.L.-L.) and Pediatric Cardiology (T.Á.), Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain; and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.A.)
| | - Teresa Álvarez
- Departments of Obstetrics and Gynecology (C.B.A., F.G., R.P., J.D.L.-L.) and Pediatric Cardiology (T.Á.), Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain; and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.A.)
| | - Juan De León-Luis
- Departments of Obstetrics and Gynecology (C.B.A., F.G., R.P., J.D.L.-L.) and Pediatric Cardiology (T.Á.), Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain; and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.A.).
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Rodrigo F, Gámez F, Avilés-Moreno JR, Pedrosa JM, Martínez-Haya B. Enhanced cation recognition by a macrocyclic ionophore at the air–solution interface probed by mass spectrometry. Phys Chem Chem Phys 2016; 18:3497-503. [DOI: 10.1039/c5cp06671a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cation binding selectivity of a benchmark calixarene is enhanced at the air–solution interface, as demonstrated by a novel mass spectrometry method.
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Affiliation(s)
- Francisco Rodrigo
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- Spain
| | - Francisco Gámez
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- Spain
| | | | - José M. Pedrosa
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- Spain
| | - Bruno Martínez-Haya
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- Spain
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Gámez F, Hortal AR, Hurtado P, Avilés-Moreno JR, Hamad S, Martínez-Haya B. Binding Selectivity of Macrocycle Ionophores in Ionic Liquids versus Aqueous Solution and Solvent-free Conditions. Chemphyschem 2015; 16:3672-80. [PMID: 26346407 DOI: 10.1002/cphc.201500477] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Indexed: 11/05/2022]
Abstract
The understanding of supramolecular recognition in room-temperature ionic liquids (RTILs) is key to develop the full potential of these materials. In this work, we provide insights into the selectivity of the binding of alkali metal cations by standard cyclodextrin and calixarene macrocycles in RTILs. A direct laser desorption/ionization mass spectrometry approach is employed to determine the relative abundances of the inclusion complexes formed through competitive binding in RTIL solutions. The results are compared with the binding selectivities measured under solvent-free conditions and in water/methanol solutions. Cyclodextrins and calixarenes in which the peripheral OH groups are substituted by bulkier side groups preferentially bind to Cs(+) . Such specific ionophoric behavior is substantially enhanced by solvation effects in the RTIL. This finding is rationalized with the aid of quantum mechanical calculations, in terms of the conformational features and steric interactions that drive the solvation of the inclusion complexes by the bulky RTIL counterions.
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Affiliation(s)
- Francisco Gámez
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain
| | - Ana R Hortal
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain
| | - Paola Hurtado
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain
| | - Juan R Avilés-Moreno
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain
| | - Said Hamad
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain
| | - Bruno Martínez-Haya
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain.
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Trobo D, Bravo C, Alvarez T, Pérez R, Gámez F, De León-Luis J. Prenatal Sonographic Features of a Double Aortic Arch: Literature Review and Perinatal Management. J Ultrasound Med 2015; 34:1921-1927. [PMID: 26446822 DOI: 10.7863/ultra.14.12076] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 02/23/2015] [Indexed: 06/05/2023]
Abstract
A double aortic arch is a relatively uncommon anomaly occasionally associated with congenital heart disease or the chromosome 22q11 deletion. We report a case of prenatal diagnosis of a double aortic arch in which the sonographic features in the 3-vessel and trachea view are highlighted. A PubMed-based search was made to retrieve all cases of prenatal diagnosis of double aortic arch. A total of 13 articles and 35 cases were found. The average gestational age at diagnosis was 29 weeks. Six cases had associated cardiac anomalies. Only 1 case had the 22q11 deletion, showing extracardiac anomalies without cardiac defect. The postnatal evolution was characterized by symptoms of tracheoesophageal compression in 72.4% of the cases. Detection of a double aortic arch should be followed by a thorough fetal scan and echocardiography, and a chromosomal study should be considered when the sonographic findings are consistent with the 22q11 deletion.
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Affiliation(s)
- Duna Trobo
- Departments of Obstetrics and Gynecology (D.T., R.P., F.G., J.D.L.-L.) and Pediatric Cardiology (T.A.), Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain; and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
| | - Coral Bravo
- Departments of Obstetrics and Gynecology (D.T., R.P., F.G., J.D.L.-L.) and Pediatric Cardiology (T.A.), Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain; and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
| | - Teresa Alvarez
- Departments of Obstetrics and Gynecology (D.T., R.P., F.G., J.D.L.-L.) and Pediatric Cardiology (T.A.), Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain; and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
| | - Ricardo Pérez
- Departments of Obstetrics and Gynecology (D.T., R.P., F.G., J.D.L.-L.) and Pediatric Cardiology (T.A.), Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain; and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
| | - Francisco Gámez
- Departments of Obstetrics and Gynecology (D.T., R.P., F.G., J.D.L.-L.) and Pediatric Cardiology (T.A.), Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain; and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
| | - Juan De León-Luis
- Departments of Obstetrics and Gynecology (D.T., R.P., F.G., J.D.L.-L.) and Pediatric Cardiology (T.A.), Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain; and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.).
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De León-Luis J, Bravo C, Gámez F, Ortiz-Quintana L. Cardiovascular System Sonographic Evaluation Algorithm: A New Sonographic Algorithm for Evaluation of the Fetal Cardiovascular System in the Second Trimester. J Ultrasound Med 2015; 34:1271-1282. [PMID: 26112631 DOI: 10.7863/ultra.34.7.1271] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVES To evaluate the reproducibility and feasibility of the new cardiovascular system sonographic evaluation algorithm for studying the extended fetal cardiovascular system, including the portal, thymic, and supra-aortic areas, in the second trimester of pregnancy (19-22 weeks). METHODS We performed a cross-sectional study of pregnant women with healthy fetuses (singleton and twin pregnancies) attending our center from March to August 2011. The extended fetal cardiovascular system was evaluated by following the new algorithm, a sequential acquisition of axial views comprising the following (caudal to cranial): I, portal sinus; II, ductus venosus; III, hepatic veins; IV, 4-chamber view; V, left ventricular outflow tract; VI, right ventricular outflow tract; VII, 3-vessel and trachea view; VIII, thy-box; and IX, subclavian arteries. Interobserver agreement on the feasibility and exploration time was estimated in a subgroup of patients. The feasibility and exploration time were determined for the main cohort. Maternal, fetal, and sonographic factors affecting both features were evaluated. RESULTS Interobserver agreement was excellent for all views except view VIII; the difference in the mean exploration time between observers was 1.5 minutes (95% confidence interval, 0.7-2.1 minutes; P < .05). In 184 fetuses (mean gestational age ± SD, 20 ± 0.6 weeks), the feasibility of all views was close to 99% except view VIII (88.7%). The complete feasibility of the algorithm was 81.5%. The mean exploration time was 5.6 ± 4.2 minutes. Only the occiput anterior fetal position was associated with a lower frequency of visualization and a longer exploration time (P < .05). CONCLUSIONS The cardiovascular system sonographic evaluation algorithm is a reproducible and feasible approach for exploration of the extended fetal cardiovascular system in a second-trimester scan. It can be used to explore these areas in normal and abnormal conditions and provides an integrated image of extended fetal cardiovascular anatomy.
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Affiliation(s)
- Juan De León-Luis
- Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (C.B., F.G., L.O.Q., J.D.L.-L.); and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.).
| | - Coral Bravo
- Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (C.B., F.G., L.O.Q., J.D.L.-L.); and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
| | - Francisco Gámez
- Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (C.B., F.G., L.O.Q., J.D.L.-L.); and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
| | - Luis Ortiz-Quintana
- Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (C.B., F.G., L.O.Q., J.D.L.-L.); and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
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Munaò G, Gámez F, Costa D, Caccamo C, Sciortino F, Giacometti A. Reference interaction site model and optimized perturbation theories of colloidal dumbbells with increasing anisotropy. J Chem Phys 2015; 142:224904. [DOI: 10.1063/1.4922163] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Affiliation(s)
- Gianmarco Munaò
- Dipartimento di Fisica e di Scienze della Terra, Università degli Studi di Messina, Viale F. Stagno d’Alcontres 31, 98166 Messina, Italy
| | | | - Dino Costa
- Dipartimento di Fisica e di Scienze della Terra, Università degli Studi di Messina, Viale F. Stagno d’Alcontres 31, 98166 Messina, Italy
| | - Carlo Caccamo
- Dipartimento di Fisica e di Scienze della Terra, Università degli Studi di Messina, Viale F. Stagno d’Alcontres 31, 98166 Messina, Italy
| | - Francesco Sciortino
- Dipartimento di Fisica and CNR-ISC, Università di Roma “Sapienza,” Piazzale Aldo Moro 2, 00185 Roma, Italy
| | - Achille Giacometti
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca’ Foscari Venezia, Calle Larga S.Marta DD2137, Venezia I-30123, Italy
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Muñoz-Chápuli M, Gámez F, Bravo C, Ortiz L, Pérez R, De León-Luis JA. The thy-box for sonographic assessment of the fetal thymus: nomogram and review of the literature. J Ultrasound Med 2015; 34:853-858. [PMID: 25911720 DOI: 10.7863/ultra.34.5.853] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVES To assess the feasibility and reproducibility of fetal thy-box visualization and to set normative data for the fetal thymus using this technique. METHODS We performed a cross-sectional observational study in pregnant women in their second trimester of pregnancy who attended the fetal medicine unit of the Hospital Gregorio Marañón from March 2011 to March 2013. Using thy-box sonography, which sets boundaries within the thymus, we assessed the feasibility of the thy-box and analyzed the factors related to its visualization. Measurements of the thy-box anteroposterior and transverse diameters were performed in healthy fetuses. Interobserver agreement was studied for both items. We set normative data for the thy-box diameters in singleton and twin pregnancies. RESULTS A total of 337 patients from 15 to 37 weeks were recruited after exclusion criteria. Thy-box feasibility was 74.2% (250 of 337). Nonfeasible cases were related to the fetal anterior spine and advanced gestational age. Assessment of the thy-box anteroposterior and transverse diameters was achievable in 250 fetuses. Interobserver agreement was good for feasibility and measurements (κ = 0.80). Linear growth of the thy-box in both diameters was observed in relation to gestational age during the second half of pregnancy. Thy-box diameters did not show significant differences according to the type of gestation, fetal sex, or chorionicity. CONCLUSIONS Thy-box diameters are achievable and reproducible by sonography in normal singleton and twin pregnancies during the second trimester; however, although feasible, the thy-box transverse diameter measurement is not reliable beyond 28 weeks. Further studies are needed to evaluate thy-box diameters in pathologic cases, especially conotruncal anomalies.
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Affiliation(s)
- Mar Muñoz-Chápuli
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (M.M-C., F.G., C.B., L.O., R.P., J.A.D.L.-L.); and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
| | - Francisco Gámez
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (M.M-C., F.G., C.B., L.O., R.P., J.A.D.L.-L.); and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
| | - Coral Bravo
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (M.M-C., F.G., C.B., L.O., R.P., J.A.D.L.-L.); and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
| | - Luis Ortiz
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (M.M-C., F.G., C.B., L.O., R.P., J.A.D.L.-L.); and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
| | - Ricardo Pérez
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (M.M-C., F.G., C.B., L.O., R.P., J.A.D.L.-L.); and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
| | - Juan A De León-Luis
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (M.M-C., F.G., C.B., L.O., R.P., J.A.D.L.-L.); and Department of Obstetrics and Gynecology, Hospital Central de la Defensa Gómez Ulla, Universidad de Alcalá de Henares, Madrid, Spain (C.B.)
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Gámez F, Rodríguez MJ, Tenías JM, García J, Pintado P, Martín R, Pérez R, Ortiz-Quintana L, De León-Luis J. Reference ranges for the pulsatility index of the fetal aortic isthmus in singleton and twin pregnancies. J Ultrasound Med 2015; 34:577-584. [PMID: 25792572 DOI: 10.7863/ultra.34.4.577] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVES The purpose of this study was to estimate reference ranges for the pulsatility index (PI) of the fetal aortic isthmus in uncomplicated singleton and twin pregnancies during the second half of pregnancy. METHODS We conducted a cross-sectional observational study involving 543 healthy fetuses: 361 singleton pregnancies and 182 twin pregnancies between 19 and 36 weeks' gestation. The aortic isthmus PI was measured in 2 sonographic planes: the longitudinal aortic arch view and the 3-vessel and trachea view. We evaluated the reproducibility of aortic isthmus PI measurements between these planes by calculating intraclass correlation coefficients and limits of agreement. Scans were performed by 2 physicians, and intraobserver agreement was also measured. Regression analysis was used to estimate gestational age reference values for the aortic isthmus PI. RESULTS The aortic isthmus PI was significantly correlated with gestational age in singletons and twins during the second half of pregnancy (P < .01). We did not find significant differences between reference ranges in singletons and twins or between the sonographic views. CONCLUSIONS This study offers reference ranges for the aortic isthmus PI during the second half of gestation in singleton and twin pregnancies. Mean aortic isthmus PI values were similar in both types of gestations as well as both sonographic views. The aortic isthmus PI may be reliably obtained from either sonographic view.
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Affiliation(s)
- Francisco Gámez
- Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (F.G., P.P., R.M., R.P., L.O.-Q., J.D.L.-L.); and Department of Obstetrics and Gynecology (M.J.R., J.G.) and Research Support Unit (J.M.T.), Hospital la Mancha Centro, Alcázar de San Juan, Ciudad Real, Spain
| | - María José Rodríguez
- Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (F.G., P.P., R.M., R.P., L.O.-Q., J.D.L.-L.); and Department of Obstetrics and Gynecology (M.J.R., J.G.) and Research Support Unit (J.M.T.), Hospital la Mancha Centro, Alcázar de San Juan, Ciudad Real, Spain
| | - José María Tenías
- Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (F.G., P.P., R.M., R.P., L.O.-Q., J.D.L.-L.); and Department of Obstetrics and Gynecology (M.J.R., J.G.) and Research Support Unit (J.M.T.), Hospital la Mancha Centro, Alcázar de San Juan, Ciudad Real, Spain
| | - Javier García
- Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (F.G., P.P., R.M., R.P., L.O.-Q., J.D.L.-L.); and Department of Obstetrics and Gynecology (M.J.R., J.G.) and Research Support Unit (J.M.T.), Hospital la Mancha Centro, Alcázar de San Juan, Ciudad Real, Spain
| | - Pilar Pintado
- Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (F.G., P.P., R.M., R.P., L.O.-Q., J.D.L.-L.); and Department of Obstetrics and Gynecology (M.J.R., J.G.) and Research Support Unit (J.M.T.), Hospital la Mancha Centro, Alcázar de San Juan, Ciudad Real, Spain
| | - Raquel Martín
- Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (F.G., P.P., R.M., R.P., L.O.-Q., J.D.L.-L.); and Department of Obstetrics and Gynecology (M.J.R., J.G.) and Research Support Unit (J.M.T.), Hospital la Mancha Centro, Alcázar de San Juan, Ciudad Real, Spain
| | - Ricardo Pérez
- Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (F.G., P.P., R.M., R.P., L.O.-Q., J.D.L.-L.); and Department of Obstetrics and Gynecology (M.J.R., J.G.) and Research Support Unit (J.M.T.), Hospital la Mancha Centro, Alcázar de San Juan, Ciudad Real, Spain
| | - Luis Ortiz-Quintana
- Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (F.G., P.P., R.M., R.P., L.O.-Q., J.D.L.-L.); and Department of Obstetrics and Gynecology (M.J.R., J.G.) and Research Support Unit (J.M.T.), Hospital la Mancha Centro, Alcázar de San Juan, Ciudad Real, Spain
| | - Juan De León-Luis
- Department of Obstetrics and Gynecology, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain (F.G., P.P., R.M., R.P., L.O.-Q., J.D.L.-L.); and Department of Obstetrics and Gynecology (M.J.R., J.G.) and Research Support Unit (J.M.T.), Hospital la Mancha Centro, Alcázar de San Juan, Ciudad Real, Spain.
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Gámez F, Hortal AR, Martínez-Haya B, Soltwisch J, Dreisewerd K. Ultraviolet laser desorption/ionization mass spectrometry of single-core and multi-core polyaromatic hydrocarbons under variable conditions of collisional cooling: insights into the generation of molecular ions, fragments and oligomers. J Mass Spectrom 2014; 49:1127-1138. [PMID: 25395128 DOI: 10.1002/jms.3433] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 06/21/2014] [Accepted: 07/09/2014] [Indexed: 06/04/2023]
Abstract
The ultraviolet laser desorption/ionization of polyaromatic hydrocarbons (PAHs) has been investigated under different background pressures of an inert gas (up to 1.2 mbar of N2) in the ion source of a hybrid, orthogonal-extracting time-of-flight mass spectrometer (oTOF-MS). The study includes an ensemble of six model PAHs with isolated single polyaromatic cores and four ones with multiple cross-linked aromatic and polyaromatic cores. In combination with a weak ion extraction field, the variation of the buffer gas pressure allowed to control the degree of collisional cooling of the desorbed PAHs and, thus, to modulate their decomposition into fragments. The dominant fragmentation channels observed are related to dehydrogenation of the PAHs, in most cases through the cleavage of even numbers of C-H bonds. Breakage of C-C bonds leading to the fragmentation of rings, side chains and core linkages is also observed, in particular, at low buffer gas pressures. The precise patterns of the combined fragmentation processes vary significantly between the PAHs. The highest abundances of molecular PAH ions and cleanest mass spectra were consistently obtained at the highest buffer gas pressure of 1.2 mbar. The effective quenching of the fragmentation pathways at this elevated pressure improves the sensitivity and data interpretation for analytical applications, although the fragmentation of side chains and of bonds between (poly)aromatic cores is not completely suppressed in all cases. Moreover, these results suggest that the detected fragments are generated through thermal equilibrium processes rather than as a result of rapid photolysis. This assumption is further corroborated by a laser desorption/ionization post-source decay analysis using an axial time-of-flight MS. In line with these findings, covalent oligomers of the PAHs, which are presumably formed by association of two or more dehydrogenated fragments, are detected with higher abundances at the lower buffer gas pressures.
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Affiliation(s)
- Francisco Gámez
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain
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Iglesias-Román N, Alvarez T, Bravol C, Pérez R, Gámez F, De León Luis J. [Prenatal diagnosis of fetal aortic stenosis with mitral insufficiency. Review of the ultrasound diagnosis and perinatal prognosis: a case report]. Ginecol Obstet Mex 2014; 82:627-633. [PMID: 25412557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This is a report about a case of prenatal diagnosis of critical fetal aortic stenosis with severe mitral valve insufficiency in a 35+6 weeks fetus. Aortic stenosis represents 3% of congenital heart diseases, but its association with mitral regurgitation is quite unusual. Thanks to the latest advances in fetal ultrasonography we can now achieve a more precise diagnosis and we have been able to improve the understanding of its physiopathology. Based on this case we have reviewed the most recent literature about fetal aortic stenosis and mitral valve insufficiency, with the aim of summarizing its main physiopathological features, highlighting the clues and key points for its intrauterine diagnosis, describing its principal complications and summarizing its current treatment options.
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De León-Luis J, Gámez F, Bravo C, Tenías JM, Arias Á, Pérez R, Maroto E, Aguarón Á, Ortiz-Quintana L. Second-trimester fetal aberrant right subclavian artery: original study, systematic review and meta-analysis of performance in detection of Down syndrome. Ultrasound Obstet Gynecol 2014; 44:147-153. [PMID: 24585513 DOI: 10.1002/uog.13336] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Revised: 01/28/2014] [Accepted: 01/31/2014] [Indexed: 06/03/2023]
Abstract
OBJECTIVES First, to estimate the prevalence of fetal aberrant right subclavian artery (ARSA) in our population and its association with Down syndrome. Second, to determine the feasibility of ultrasound to visualize ARSA in the three planes. Finally, to carry out a systematic review of the literature on the performance of second-trimester ARSA to identify fetuses with Down syndrome. METHODS ARSA was assessed by ultrasound in the axial plane and confirmed in the longitudinal and coronal planes during the second half of pregnancy in women attending our unit (from February 2011 to December 2012). A search of diagnostic tests for the assessment of ARSA was carried out in international databases. Relevant studies were subjected to a critical reading, and meta-analysis was performed with Meta-DiSc. RESULTS Of the 8781 fetuses in our population (mean gestational age: 24 ± 5.4 weeks), 22 had Down syndrome. ARSA was detected in the axial view in 60 cases (0.7%) and confirmed in the coronal view in 96.7% and in the longitudinal view in 6.7% (P < 0.001). Seven cases with ARSA had Down syndrome and all were in the non-isolated-ARSA group. The estimates of positive likelihood ratio (LR) were 0 for isolated ARSA and 199 (95% CI, 88.9-445.2) for non-isolated ARSA. In the systematic review, six studies were selected for quantitative synthesis. The pooled estimates of positive and negative LRs for global ARSA were, respectively, 35.3 (95% CI, 24.4-51.1) and 0.75 (95% CI, 0.64-0.87). For isolated ARSA, the positive and negative LRs were 0 (95% CI, 0.0-14.7) and 0.98 (95% CI, 0.94-1.02), respectively. CONCLUSIONS The prevalence of ARSA seems close to 1%. The coronal plane is the most suitable for its confirmation after detection in the axial plane. Detection of isolated or non-isolated ARSA should guide decisions about karyotyping given that isolated ARSA shows a weak association with Down syndrome.
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Affiliation(s)
- J De León-Luis
- Department of Obstetrics and Gynecology, Hospital General Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain
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Gámez F. Thermodynamic of fluids from a general equation of state: The molecular discrete perturbation theory. J Chem Phys 2014; 140:234504. [DOI: 10.1063/1.4882897] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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De León-Luis J, Pérez L, Pérez R, Bravo C, Parente A, Gámez F, Antolín E, Aguarón Á, Ortiz L. Prenatal diagnosis of incomplete bladder duplication: sonographic features and perinatal management. J Ultrasound Med 2014; 33:358-361. [PMID: 24449743 DOI: 10.7863/ultra.33.2.359] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
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Gámez F, Acemel RD, Cuetos A. Demixing and nematic behaviour of oblate hard spherocylinders and hard spheres mixtures: Monte Carlo simulation and Parsons–Lee theory. Mol Phys 2013. [DOI: 10.1080/00268976.2013.771802] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bravo C, De León-Luis J, Gámez F, Ruiz Y, Pintado P, Pérez R, Ortiz-Quintana L. Fetal MRI as a complementary technique after prenatal diagnosis of persistent vitelline artery in an otherwise normal fetus. J Magn Reson Imaging 2013; 38:951-4. [DOI: 10.1002/jmri.24214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2012] [Accepted: 04/15/2013] [Indexed: 11/09/2022] Open
Affiliation(s)
- Coral Bravo
- Fetal Medicine Unit; Department of Obstetrics and Gynecology; Hospital General Gregorio Marañón; Universidad Complutense de Madrid; Spain
| | - Juan De León-Luis
- Fetal Medicine Unit; Department of Obstetrics and Gynecology; Hospital General Gregorio Marañón; Universidad Complutense de Madrid; Spain
| | - Francisco Gámez
- Fetal Medicine Unit; Department of Obstetrics and Gynecology; Hospital General Gregorio Marañón; Universidad Complutense de Madrid; Spain
| | - Yolanda Ruiz
- Department of Radiology; Hospital General Gregorio Marañón; Universidad Complutense de Madrid; Spain
| | - Pilar Pintado
- Fetal Medicine Unit; Department of Obstetrics and Gynecology; Hospital General Gregorio Marañón; Universidad Complutense de Madrid; Spain
| | - Ricardo Pérez
- Fetal Medicine Unit; Department of Obstetrics and Gynecology; Hospital General Gregorio Marañón; Universidad Complutense de Madrid; Spain
| | - Luis Ortiz-Quintana
- Fetal Medicine Unit; Department of Obstetrics and Gynecology; Hospital General Gregorio Marañón; Universidad Complutense de Madrid; Spain
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Gámez F, De León-Luis J, Bravo C, Pintado P, Ruiz Y, Palomo S, Pérez R, Ortiz-Quintana L. Prenatal diagnosis of Type II single umbilical artery (persistent vitelline artery) in a normal fetus. Ultrasound Obstet Gynecol 2013; 41:593-594. [PMID: 23065909 DOI: 10.1002/uog.12325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
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Bravo C, Ruiz Y, Ortiz L, Gámez F, De León-Luis J. Neonatal magnetic resonance imaging as a complementary technique after prenatal diagnosis of an aberrant right subclavian artery. J Ultrasound Med 2013; 32:721-724. [PMID: 23525401 DOI: 10.7863/jum.2013.32.4.721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
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Gámez F, Benavides AL. Perturbation theory for non-spherical fluids based on discretization of the interactions. J Chem Phys 2013; 138:124901. [DOI: 10.1063/1.4794783] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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Gámez F, Cortada M, Lago S. β-stretching parameter and Vogel–like temperature for reorientational relaxation from molecular dynamics of rod models with extended dipoles. Mol Phys 2013. [DOI: 10.1080/00268976.2012.704156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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