11037 research outputs found
Sort by
State‐of‐the‐Art, insights, and perspectives for MOFs‐nanocomposites and MOF‐derived (nano) materials
Get PDFComposite structures created from metal‒organic framework (MOF) matrices are reviewed in this work. Depending on the nature of the second component apart from the MOF platform, several synergistic properties may arise; at the same time, the initial features of the single constituent materials are usually maintained, and individual shortcomings are mitigated. Currently, timely energy and environmental challenges necessitate the quest for more advanced materials and technologies. Significant developments in MOF‐nanocomposites have enabled their application across a wide range of modern and traditional fields. This review demonstrates in an exhaustive and critical way a broad range of MOF‐based nanocomposites, namely, MOF/perovskite nanoparticles (NPs), MOF/metal (non‐iron) oxide NPs, MOF/Fe 3 O 4 NPs, MOF/metal chalcogenide NPs, MOF/metal NPs, and MOF/carbon‐based materials, as well as nanocomposites of MOFs with other semiconductor NPs. Key points related to the synthesis, characterization, and applications of these materials are provided. Depending on their configuration, the composites under discussion can be applied in domains such as photoelectrochemical sensing, antibiotic/dye degradation, optoelectronics, photovoltaics, catalysis, solar cells, supercapacitors, batteries, water remediation, and drug loading. Sometimes, MOFs can undergo certain processes (e.g. pyrolysis) and act as precursors for composite materials with appealing characteristics. Therefore, a special section in the manuscript is devoted to MOF‐derived NP composites. Toward the end of the text, we conclude while also describing the challenges and possibilities for further investigations in the umbrella of material categories analyzed herein. Despite the progress achieved, key questions remain to be answered regarding the relationships among the morphology, properties, and polyvalent activity of these materials. The present work aims to shed light on most of their aspects and innovative prospects, facilitating a deeper comprehension of the underlying phenomena, functionality, and mechanistic insights governing their behavior.Agencia Estatal de Investigación | Ref. PID2020-117371RA-I00Agencia Estatal de Investigación | Ref. TED2021-131628A-I00Agencia Estatal de Investigación | Ref. PID2022-138724NB-I00Xunta de Galicia | Ref. ED431F2021/05Xunta de Galicia | Ref. GRCED431C2020/09Agencia Estatal de Investigación | Ref. RYC2018-026103-IUniversidade de Vigo/CISU
Dating the early Christian baptisteries from Idanha-a-Velha—the Suebi-Visigothic Egitania: stratigraphy, radiocarbon and OSL
No full textThe results of the excavations carried out by one of the authors in the early Christian baptisteries of Idanha-a-Velha, in Suebi-Visigothic Egitania, are presented. Chronostratigraphic data (stratigraphic sequence, typological analysis) are compared with radiocarbon and luminescence dates in order to establish a hypothesis concerning the construction date of both north and south baptisteries. The results have shown that the baptisteries are dated earlier than what had been proposed based on their constructive typology. The dates proposed in this article will generate a change in the paradigm established for this type of constructions in the Iberian Peninsula
I es a noite, i es a aurora. A poética da luz en Rosalía de Castro
Get PDFDiscurso lido no acto da súa recepción, polo ilustrísimo señor don Anxo Angueira Viturro e resposta da excelentísima señora dona Chus Pato O solemne acto académico en que foron lidos os dous discursos recolleitos no presente volume celebrouse o 27 de abril de 2024 no Auditorio municipal de Padrón. O autor percorre no seu discurso o desenvolvemento da poética da luz na obra de Rosalía de Castro, poética que acabou por converterse nun signo moi persoal e significativo a respecto de todo o conxunto da súa obra
Glosando el Pórtico de la Gloria. El bestiario soteriológico del Maestro Mateo
No full textEl mensaje de salvación presentado por el conjunto escultórico del Pórtico de la Gloria de la Catedral de Santiago de Compostela, una de las obras cumbre del llamado «arte 1200», continúa detrás de sus tres
arcos a través de la figuración plasmada por el taller del Maestro Mateo en los capiteles de los pilares del último tramo de la nave principal de la basílica en una suerte de glosa figurativa del programa del portal.
En ellos, los escultores recurrirán a temas iconográficos tomados del bestiario medieval y que, en algunos casos, semejan una traducción pétrea de las miniaturas que ilustraban los bestiarios ingleses de finales del siglo XII lo que lleva a plantear la posibilidad de la presencia real de ejemplares de estos tratados en la biblioteca catedralicia y que, por lo tanto, estos hubiesen estado a disposición de los artistas para la
definición de su repertorioThe message of salvation presented by the sculptural ensemble of the Portico de la Gloria in Santiago de Compostela Cathedral, one of the masterpieces of the so-called «1200 art», continues behind its three
arches through the figuration created by the workshop of Master Mateo in the capitals of the pillars of the last section of the main nave of the basilica in a sort of figurative gloss of the portal’s programme. In them, the sculptors resorted to iconographic themes taken from the medieval bestiary and which, in some cases, resemble a stone translation of the miniatures that illustrated the English bestiaries of the late 12th century, which leads us to consider the possibility of the real presence of copies of these treatises in the cathedral library and that, therefore, they would have been available to the artists for the definition of their repertoire.Agencia Estatal de Investigación | Ref. PID2019-108910GB-C2
O Spinal Mouse como instrumento de análise da curvatura da coluna vertebral: um estudo bibliométrico
Get PDFINTRODUCTION: Global concern about spinal health is increasing due to the growing number of young people affected by conditions such as scoliosis, hyperkyphosis, and hyperlordosis, which can lead to pain, stiffness, functional limitations, and reduced quality of life. OBJECTIVE: To analyze global research trends related to the use of the Spinal Mouse in the evaluation of posture and spinal curvature using a bibliometric approach. METHOD: A bibliometric study was conducted based on documents indexed in the Web of Science and Scopus databases, covering publications up to January 2025. The variables analyzed included year of publication, citation metrics, journals, authorship and collaboration patterns, and the countries and institutions with the highest scientific output. RESULTS: A total of 227 references were analyzed. Most of the publications on the Spinal Mouse were scientific articles, with an annual growth rate of 6.33% and a mean of 12.09 citations per document. Spain and Japan were the countries with the highest number of publications, although international collaboration was found to be limited. CONCLUSIONS: Interest in the Spinal Mouse is growing, particularly in the context of non-invasive assessment of posture and spinal alignment. Greater international collaboration is recommended to strengthen research in this area, as the device has shown potential due to its ease of use, accuracy, and applicability in both clinical and research settings.INTRODUÇÃO: A preocupação global com a saúde da coluna vertebral tem vindo a aumentar devido ao número crescente de jovens afetados por condições como escoliose, hipercifose e hiperlordose, que podem provocar dor, rigidez, limitações funcionais e redução da qualidade de vida. OBJETIVO: Analisar as tendências globais da investigação científica relacionada com a utilização do Spinal Mouse na avaliação da postura e da curvatura da coluna vertebral, recorrendo a uma abordagem bibliométrica. MÉTODO: Foi realizado um estudo bibliométrico com base em documentos indexados nas bases
de dados Web of Science e Scopus, abrangendo publicações até janeiro de 2025. As variáveis analisadas incluíram o ano de publicação, métricas de citação, revistas científicas, padrões de autoria e colaboração, bem como os países e instituições com maior produção científica. RESULTADOS: Foram analisadas 227 referências. A maioria das publicações sobre o Spinal Mouse corresponde a artigos científicos, registando-se uma taxa de crescimento anual de 6,33% e uma média de 12,09 citações por documento. Espanha e Japão foram os países com maior número de publicações, embora a colaboração internacional se tenha revelado limitada. CONCLUSÕES: O interesse pelo Spinal Mouse tem vindo a crescer, especialmente no contexto da avaliação não invasiva da postura e do alinhamento da coluna vertebral. Recomenda-se um reforço da colaboração internacional para fortalecer a investigação nesta área, dado o potencial do dispositivo, comprovado pela sua facilidade de utilização, precisão e aplicabilidade tanto em contextos clínicos como de investigação
Yo, yo mismo y el Otro. Recursos del cómic de viaje para la representación de la otredad
Get PDFEl artículo versa sobre una serie de autores de cómic contemporáneos cuyas obras los relacionan directamente con la tradición de los cuadernos de viaje, convirtiéndose por lo tanto en una actualización de la figura de los clásicos exploradores y viajeros que cuentan las vicisitudes de sus periplos. Se prestará especial atención al análisis de los cómics “Cuaderno de viaje” de Craig Thompson, “Tú, una bici y la carretera” de Eleanor Davis y “El viaje” de Agustina Guerrero.
Estos tebeos dialogan con la tradición del cuaderno, un género que combina escritura e imagen en un lenguaje particular -perteneciente, al igual que el cómic, a las narraciones gráficas- y que fue empleado tanto como testimonio de las grandes exploraciones como diario íntimo que recoge las impresiones y visión creativa de artistas de diversa índole. Estas obras, a las que se denomina cómic de viaje, se enmarcan por lo tanto en el contexto más amplio de la autobiografía, si bien están restringidas a un período y vivencia concretos, y son bastante heterogéneas en cuanto a los contenidos que pueden incluir (sensaciones, el contacto con el otro, las penurias del viaje, reflexiones sobre su obra, etc)
Gender imbalance in housework allocation: a question of time?
No full textUsing the 2002–2003 and 2009–2010 Spanish Time Use Surveys, this paper analyzes whether increases in nonworking time help dual-earner couples to reduce gender imbalance in housework allocation. Our empirical strategy exploits the fact that interviewed partners complete the survey on the same randomly assigned day, which may be a working day or a nonworking day for each spouse. This survey design allows us to compare the housework allocation decisions of dual-earner couples that are similar in key observable characteristics but differ in their work schedules during the interview day. We find that own nonworking days are associated with increases in men’s and women’s own contribution to housework and with decreases in the time their spouses spend on such activities. Yet the resulting imbalance in housework allocation differs depending on whether it is the wife or the husband with a day off. Thus, a husband’s nonworking day leads to an (almost) equal distribution of housework, whereas a wife’s nonworking day leads the partners to approach full specialization—with the wife performing most of the household tasks.Agencia Estatal de Investigación | Ref. RTI2018-099403-B-I0
Neuromeric distribution of nicotinamide adenine dinucleotide phosphate-diaphorase activity in the adult lamprey brain
Get PDFThis study reports for the first time the distribution and morphological characterization of nicotinamide adenine dinucleotide phosphate-diaphorase (NADPH-d; a reliable marker of nitric oxide synthase activity) positive elements in the central nervous system of the adult river lamprey (
Lampetra fluviatilis
) on the framework of the neuromeric model and compares their cytoarchitectonic organization with that of gnathostomes. Both NADPH-d exhibiting cells and fibers were observed in all major divisions of the lamprey brain as well as in the spinal cord. In the secondary prosencephalon, NADPH-d positive cells were observed in the mitral cell layer of the olfactory bulb, evaginated pallium, amygdala, dorsal striatum, septum, lateral preoptic nucleus, caudal paraventricular area, posterior entopeduncular nucleus, nucleus of the stria medullaris, hypothalamic periventricular organ and mamillary region
sensu lato
. In the lamprey diencephalon, NADPH-d labeled cells were observed in several nuclei of the prethalamus, epithalamus, pretectum, and the basal plate. Especially remarkable was the staining observed in the right habenula and several pretectal nuclei. NADPH-d positive cells were also observed in the following mesencephalic areas: optic tectum (two populations), torus semicircularis, nucleus M5 of Schöber, and a ventral tegmental periventricular nucleus. Five different cell populations were observed in the isthmic region, whereas the large sensory dorsal cells, some cells located in the interpeduncular nucleus, the motor nuclei of most cranial nerves, the solitary tract nucleus, some cells of the reticular nuclei, and small cerebrospinal fluid-contacting (CSF-c) cells were the most evident stained cells of the rhombencephalon proper. Finally, several NADPH-d positive cells were observed in the rostral part of the spinal cord, including the large sensory dorsal cells, numerous CSF-c cells, and some dorsal and lateral interneurons. NADPH-d positive fibers were observed in the olfactory pathways (primary olfactory fibers and stria medullaris), the fasciculus retroflexus, and the dorsal column tract. Our results on the distribution of NADPH-d positive elements in the brain of the adult lamprey
L. fluviatilis
are significantly different from those previously reported in larval lampreys and demonstrated that these animals possess a complex nitrergic system readily comparable to those of other vertebrates, although important specific differences also exist.Agencia Estatal de Investigación | Ref. PID2020-113646GA-I00Xunta de Galicia | Ref. ED431F 2021/0
Stereochemical reassignment by total synthesis of an ocular pyridinium bisretinoid of retinal pigment epithelium lipofuscin: iiso -A2E Is i -A2E
Get PDFThe stereoselective synthesis of recently discovered lipofuscin fluorophore iiso-A2E, a C3,C4-bis-polyenylpyridinium salt derived from all-trans-retinal, which has been detected in human, pig, mouse, and bovine eyes, has been completed. The Suzuki–Miyaura cross-coupling reaction and Horner–Wadsworth–Emmons condensation were the key synthetic steps for the construction of the tetraenyl and pentaenyl arms, respectively, starting from a properly functionalized pyridine-3,4-dialdehyde surrogate, followed by pyridine alkylation. Subtle changes in the 1H NMR and 13C NMR spectra of the synthetic compound and natural compound suggested the structural revision of the latter, for which the C13′═C14′ E isomer at the longer C3-unsaturated pentaenyl chain of the pyridinium ring was proposed. The synthesis confirmed the alternative stereostructure of the natural pigment, which should be named i-A2E, thus correcting the double bond geometry of the natural fluorophore at C13′═C14′.Xunta de Galicia | Ref. ED431C 2025/054Xunta de Galicia | Ref. ED-431G/2023/06-FEDERAgencia Estatal de Investigación | Ref. PID2022-136504OB-I0