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Gomez-Sanchez A, Franco-Luján VA, Alfaro-López HM, Hernández-Sánchez L, Cruz-Martínez H, Medina DI. Carbon Material-Reinforced Polymer Composites for Bipolar Plates in Polymer Electrolyte Membrane Fuel Cells. Polymers (Basel) 2024; 16:671. [PMID: 38475354 DOI: 10.3390/polym16050671] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 01/29/2024] [Accepted: 02/08/2024] [Indexed: 03/14/2024] Open
Abstract
Bipolar plates (BPs) are one of the most important components of polymer electrolyte membrane fuel cells (PEMFCs) because of their important role in gas and water management, electrical performance, and mechanical stability. Therefore, promising materials for use as BPs should meet several technical targets established by the United States Department of Energy (DOE). Thus far, in the literature, many materials have been reported for possible applications in BPs. Of these, polymer composites reinforced with carbon allotropes are one of the most prominent. Therefore, in this review article, we present the progress and critical analysis on the use of carbon material-reinforced polymer composites as BPs materials in PEMFCs. Based on this review, it is observed that numerous polymer composites reinforced with carbon allotropes have been produced in the literature, and most of the composites synthesized and characterized for their possible application in BPs meet the DOE requirements. However, these composites can still be improved before their use for BPs in PEMFCs.
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Affiliation(s)
- Alejandro Gomez-Sanchez
- Tecnológico Nacional de México, Instituto Tecnológico del Valle de Etla, Abasolo S/N, Barrio del Agua Buena, Santiago Suchilquitongo, Oaxaca 68230, Mexico
| | - Víctor A Franco-Luján
- Tecnológico Nacional de México, Instituto Tecnológico del Valle de Etla, Abasolo S/N, Barrio del Agua Buena, Santiago Suchilquitongo, Oaxaca 68230, Mexico
| | - Hilda M Alfaro-López
- Instituto Politécnico Nacional, Escuela Superior de Ingeniería Mecánica y Eléctrica, E.S.I.M.E.-Zacatenco, I.E., Edificio 2, U.P.A.L.M., Lindavista, Gustavo A. Madero, Ciudad de México 07738, Mexico
| | - Laura Hernández-Sánchez
- Tecnológico Nacional de México, Instituto Tecnológico del Valle de Etla, Abasolo S/N, Barrio del Agua Buena, Santiago Suchilquitongo, Oaxaca 68230, Mexico
| | - Heriberto Cruz-Martínez
- Tecnológico Nacional de México, Instituto Tecnológico del Valle de Etla, Abasolo S/N, Barrio del Agua Buena, Santiago Suchilquitongo, Oaxaca 68230, Mexico
| | - Dora I Medina
- Tecnologico de Monterrey, Institute of Advanced Materials for Sustainable Manufacturing, Monterrey 64849, Nuevo Leon, Mexico
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Hernández-Sánchez L, Ramos-Prieto I, Soto-Eguibar F, Moya-Cessa HM. Exact solution for the interaction of two decaying quantized fields. Opt Lett 2023; 48:5435-5438. [PMID: 37831886 DOI: 10.1364/ol.503837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 09/28/2023] [Indexed: 10/15/2023]
Abstract
We show that the Markovian dynamics of two coupled harmonic oscillators may be analyzed using a Schrödinger equation and an effective non-Hermitian Hamiltonian. This may be achieved by a non-unitary transformation that involves superoperators; such transformation enables the removal of quantum jump superoperators, which allows us to rewrite the Lindblad master equation in terms of a von Neumann-like equation with an effective non-Hermitian Hamiltonian. This may be generalized to an arbitrary number of interacting fields. Finally, by applying an extra non-unitary transformation, we may diagonalize the effective non-Hermitian Hamiltonian to obtain the evolution of any input state in a fully quantum domain.
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Rodríguez-García ME, Cotrina-Vinagre FJ, Bellusci M, Hernández-Sánchez L, de Aragón AM, López-Laso E, Martín-Hernández E, Martínez-Azorín F. First splicing variant in HECW2 with an autosomal recessive pattern of inheritance and associated with NDHSAL. Hum Mutat 2022; 43:1361-1367. [PMID: 35753050 DOI: 10.1002/humu.24426] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 06/06/2022] [Accepted: 06/21/2022] [Indexed: 11/07/2022]
Abstract
We report the clinical and genetic features of a Caucasian girl who presented a severe neurodevelopmental disorder with drug-resistant epilepsy, hypotonia, severe gastro-esophageal reflux and brain MRI anomalies. WES uncovered a novel variant in homozygosis (g.197092814_197092824delinsC) in HECW2 gene that encodes the E3 ubiquitin-protein ligase HECW2. This protein induces ubiquitination and is implicated in the regulation of several important pathways involved in neurodevelopment and neurogenesis. Furthermore, de novo heterozygous missense variants in this gene have been associated with NDHSAL. The homozygous variant of our patient disrupts the splice donor site of intron 22 and causes the elimination of exon 22 (r.3766_3917+1del) leading to an in-frame deletion of the protein (p.Leu1256_Trp1306del). Functional studies showed a two-fold increase of its RNA expression, while the protein expression level was reduced by 60%, suggesting a partial LOF mechanism of pathogenesis. Thus, this is the first patient with NDHSAL caused by an autosomal recessive splicing variant in HECW2. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- María Elena Rodríguez-García
- Grupo de Enfermedades Raras, Mitocondriales y Neuromusculares (ERMN) Instituto de Investigación Hospital 12 de Octubre (i+12), E-28041, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), E-28041, Madrid, Spain
| | - Francisco Javier Cotrina-Vinagre
- Grupo de Enfermedades Raras, Mitocondriales y Neuromusculares (ERMN) Instituto de Investigación Hospital 12 de Octubre (i+12), E-28041, Madrid, Spain
| | - Marcello Bellusci
- Unidad Pediátrica de Enfermedades Raras, Enfermedades Mitocondriales y Metabólicas Hereditarias, Hospital 12 de Octubre, E-28041, Madrid, Spain
| | - Laura Hernández-Sánchez
- Grupo de Enfermedades Raras, Mitocondriales y Neuromusculares (ERMN) Instituto de Investigación Hospital 12 de Octubre (i+12), E-28041, Madrid, Spain
| | | | - Eduardo López-Laso
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), E-28041, Madrid, Spain.,Unidad de Neurología Pediátrica, Hospital Universitario Reina Sofia IMIBIC, E-14004, Córdoba, Spain
| | - Elena Martín-Hernández
- Grupo de Enfermedades Raras, Mitocondriales y Neuromusculares (ERMN) Instituto de Investigación Hospital 12 de Octubre (i+12), E-28041, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), E-28041, Madrid, Spain.,Unidad Pediátrica de Enfermedades Raras, Enfermedades Mitocondriales y Metabólicas Hereditarias, Hospital 12 de Octubre, E-28041, Madrid, Spain
| | - Francisco Martínez-Azorín
- Grupo de Enfermedades Raras, Mitocondriales y Neuromusculares (ERMN) Instituto de Investigación Hospital 12 de Octubre (i+12), E-28041, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), E-28041, Madrid, Spain
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Moreno-Jiménez S, Alvarado-Torres LB, Flores-Vázquez F, Contreras-Núñez P, Vázquez-González C, Hernández-Sánchez L, Torres-Ríos JA, Barrios-Merino C, Toba-Avitia GDL, Jacobo JA, Mamani-Choquepata R, Gutiérrez-Aceves GA, Suárez-Campos JJ, Celis MA. The Thalamic Arteriovenous Malformations Have Better Prognosis than Basal Ganglia Malformations Regarding Obliteration: Prognostic Factors Analysis. World Neurosurg 2021; 150:e750-e755. [PMID: 33812069 DOI: 10.1016/j.wneu.2021.03.127] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 03/23/2021] [Accepted: 03/24/2021] [Indexed: 11/17/2022]
Abstract
BACKGROUND Arteriovenous malformations (AVMs) are rare vascular congenital lesions that affect mainly patients during their productive years of life. In order to obtain a better quality of life for patients with this disease, a multidisciplinary approach is recommended. Radiosurgery is one of the treatment modalities available for AVMs, but many factors may influence the effectiveness of this strategy. Classically, it has been said that deep-seated lesions have a particular behavior compared with AVMs in other regions, but a differentiation between thalamic lesions and those located in the basal ganglia has not been made. METHODS Institutional records for central core AVMs treated with radiosurgery between January 2004 and January 2014 were retrospectively analyzed. Brainstem lesions were excluded from the analysis. RESULTS Forty-nine patients with deep-seated AVMs were included. Forty-three (87.8%) were located in the thalamus and 6 (12.2%) in the area of basal ganglia. The nidus mean volume was 4.1 cm3 (SD: 4.1), the maximum diameter mean was of 19.5 mm (SD: 8.0). The prescription dose was 18.2 Gy (SD: 2.1), and the follow-up time was 75.8 months (SD: 32.5). There was a greater obliteration rate in thalamic AVMs compared with those located in the basal ganglia: 81.4% versus 33.3% (P = 0.026), respectively. There was no association between categorical variables and obliteration rate. CONCLUSIONS Stereotactic radiosurgery is a good option for patients with thalamic and basal ganglia AVMs, but a multidisciplinary approach to decision-making is mandatory in order to achieve the best results.
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Affiliation(s)
- Sergio Moreno-Jiménez
- Radiosurgery Unit, National Institute of Neurology and Neurosurgery, Mexico City, Mexico.
| | | | | | - Paula Contreras-Núñez
- Radiosurgery Unit, National Institute of Neurology and Neurosurgery, Mexico City, Mexico
| | | | | | | | - Carlos Barrios-Merino
- Radiosurgery Unit, National Institute of Neurology and Neurosurgery, Mexico City, Mexico
| | | | - Javier A Jacobo
- Radiosurgery Unit, National Institute of Neurology and Neurosurgery, Mexico City, Mexico
| | | | | | - José J Suárez-Campos
- Radiosurgery Unit, National Institute of Neurology and Neurosurgery, Mexico City, Mexico
| | - Miguel A Celis
- Radiosurgery Unit, National Institute of Neurology and Neurosurgery, Mexico City, Mexico
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Rodríguez-García ME, Cotrina-Vinagre FJ, Arranz-Canales E, Aragón AMD, Hernández-Sánchez L, Rodríguez-Fornés F, Carnicero-Rodríguez P, Morales-Conejo M, Martín-Hernández E, Martínez-Azorín F. A novel de novo mutation in the PURA gene associated with a new clinical finding: large brainstem. J Genet 2020; 99:7. [PMID: 32089526] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report the case of a Caucasian Spanish boy, who showed profound neonatal hypotonia, feeding difficulties, apnea, severe developmental delay, epilepsy, bilateral convergent strabismus, poor verbal language development and a large brainstem. Whole-exome sequence uncovered a novel de novo mutation in the purine-rich element binding protein A gene (PURA; NM_005859.4:c.72del:p.(-Gly25AlafsTer53)) that encodes the transcriptional activator protein Pur-alpha (PURA). Mutations in this gene have been identified in patients with PURA syndrome, a rare disorder characterized by an early hypotonia, developmental delay, severe intellectual disability with or without epilepsy, and disability in expressive language development. Although, up to 75 cases have been identified worldwide, to the best of our knowledge, this is the first patient described with a brainstem larger than normal. In conclusion, our data expand both geneticand phenotypic spectrum associated with PURA gene mutations.
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Affiliation(s)
- María Elena Rodríguez-García
- Laboratorio de Enfermedades Mitocondriales, Instituto de InvestigaciÓn Hospital 12 de Octubre (i+12), 28041 Madrid, Spain.
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Latorre-Marco I, Acevedo-Nuevo M, Solís-Muñoz M, Hernández-Sánchez L, López-López C, Sánchez-Sánchez MM, Wojtysiak-Wojcicka M, de Las Pozas-Abril J, Robleda-Font G, Frade-Mera MJ, De Blas-García R, Górgolas-Ortiz C, De la Figuera-Bayón J, Cavia-García C. Psychometric validation of the behavioral indicators of pain scale for the assessment of pain in mechanically ventilated and unable to self-report critical care patients. Med Intensiva 2016; 40:463-473. [PMID: 27590592 DOI: 10.1016/j.medin.2016.06.004] [Citation(s) in RCA: 10] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 06/01/2016] [Accepted: 06/03/2016] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To assess the psychometric properties of the behavioral indicators of pain scale (ESCID) when applied to a wide range of medical and surgical critical patients. DESIGN A multicentre, prospective observational study was designed to validate a scale measuring instrument. SETTING Twenty Intensive Care Units of 14 hospitals belonging to the Spanish National Health System. PARTICIPANTS A total of 286 mechanically ventilated, unable to self-report critically ill medical and surgical adult patients. PROCEDURE Pain levels were measured by two independent evaluators simultaneously, using two scales: ESCID and the behavioral pain scale (BPS). Pain was observed before, during, and after two painful procedures (turning, tracheal suctioning) and one non-painful procedure. MAIN VARIABLES ESCID reliability was measured on the basis of internal consistency using the Cronbach-α coefficient. Inter-rater and intra-rater agreement were measured. The Spearman correlation coefficient was used to assess the correlation between ESCID and BPS. RESULTS A total of 4386 observations were made in 286 patients (62% medical and 38% surgical). High correlation was found between ESCID and BPS (r=0.94-0.99; p<0.001), together with high intra-rater and inter-rater concordance. ESCID was internally reliable, with a Cronbach-α value of 0.85 (95%CI 0.81-0.88). Cronbach-α coefficients for ESCID domains were high: facial expression 0.87 (95%CI 0.84-0.89), calmness 0.84 (95%CI 0.81-0.87), muscle tone 0.80 (95%CI 0.75-0.84), compliance with mechanical ventilation 0.70 (95%CI 0.63-0.75) and consolability 0.85 (95%CI 0.81-0.88). CONCLUSION ESCID is valid and reliable for measuring pain in mechanically ventilated unable to self-report medical and surgical critical care patients. CLINICALTRIALS.GOV: NCT01744717.
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Affiliation(s)
- I Latorre-Marco
- Medical Intensive Care Unit, Hospital Universitario Puerta de Hierro Majadahonda, Majadahonda, Spain.
| | - M Acevedo-Nuevo
- Medical Intensive Care Unit, Hospital Universitario Puerta de Hierro Majadahonda, Majadahonda, Spain
| | - M Solís-Muñoz
- Nursing and Healthcare, Research Area, Hospital Universitario Puerta de Hierro Majadahonda, Majadahonda, Spain
| | - L Hernández-Sánchez
- Medical Intensive Care Unit, Hospital Universitario Puerta de Hierro Majadahonda, Majadahonda, Spain
| | - C López-López
- Emergency and Trauma Intensive Care Unit, Hospital Universitario Doce de Octubre, Madrid, Spain
| | | | - M Wojtysiak-Wojcicka
- Intensive Care Unit, Hospital Universitario Quirón Madrid, Pozuelo de Alarcón, Spain
| | - J de Las Pozas-Abril
- Intensive Care Unit, Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - G Robleda-Font
- Intensive Care Unit, Hospital Universitario de la Santa Creu i Sant Pau, Barcelona, Spain
| | - M J Frade-Mera
- Intensive Care Unit, Hospital Universitario Doce de Octubre, Madrid, Spain
| | - R De Blas-García
- Postsurgical Intensive Care Unit, Hospital Universitario Puerta de Hierro Majadahonda, Majadahonda, Spain
| | - C Górgolas-Ortiz
- Postsurgical Intensive Care Unit, Hospital Universitario de Basurto, Bilbao, Spain
| | | | - C Cavia-García
- Intensive Care Unit, Hospital Universitario de Cruces, Barakaldo, Spain
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