University of Valencia
Repositori d'Objectes Digitals per a l'Ensenyament la Recerca i la CulturaNot a member yet
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Combination of pulsed electric fields and ultrasounds technologies for mycotoxins mitigation in grape juice
Get PDFGrape juice has increased market share due to its rich phenolic compounds, linked to preventive effects against cardiovascular diseases and cancer. However, concerns arise as studies report the presence of mycotoxins in juices, posing significant health risks. Pulsed electric fields (PEF) and ultrasounds (USN) have been explored as an eco-friendly tool for contaminants mitigation. The present study explores the effect of the sequential combination (PEF + USN) for mycotoxins mitigation in grape juice. For this, grape juice was elaborated and spiked individually with Aflatoxin B1 (AFB1), Aflatoxin B2 (AFB2), Ochratoxin A (OTA), Enniatin B (ENNB), and Enniatin B1 (ENNB1) at a concentration of 100 µg/L. Then, mycotoxins were extracted from treated samples and non-treated controls employing Dispersive Liquid-Liquid Microextraction (DLLME) and determined by Liquid Chromatography couple to mass spectrometry (LC-MS/MS). The reductions obtained were up to 48 % for ENNB1, 36 % for ENNB, 21 % for OTA, and 15 % for both of AFB1 and AFB2. Thus, the combination of PEF + USN showed interesting potential to be applied for mycotoxins mitigation
Entretien avec Carole Fréchette
Get PDFEntretien réalisé le 7 novembre 2023 avec l'écrivaine québécoise Carole Fréchette, dans lequel elle évoque son ouvrage Les Quatre Morts de Marie (1998), œuvre formatrice pour l'auteure, et l'une de ses premières œuvres en solo
Development of the NEST program: Nature Education for Sustainable Teaching: a training course to foster knowledge, self-efficacy, and willingness to teach outdoors
Get PDFOutdoor education (OE) is increasingly recognized as a key pedagogical approach to foster holistic child development, wellbeing, and sustainable attitudes. While well established in Northern European educational systems, its adoption in Southern Europe remains limited, often due to cultural and institutional barriers and insufficient teacher preparation. This study presents the design and developmentoftheNESTprogram(NatureEducationforSustainable Teaching), a structured training course aimed at enhancing student teachers' and educators' knowledge, self-efficacy, and willingness to teach outdoors in early childhood education. The program was developed through a participatory co-creation process that actively involved national and international experts in pedagogy and OE, from both academic and professional practice contexts. Throughthis collaborative process, the experts contributed to identifying priority themes and shaping the overall structure of the curriculum. The outcome is a four-module program that combines theoretical input, experiential activities, and reflective practices, and is grounded in experiential, transformative, and sociocultural learning theories. The NEST program represents an innovative and evidence-based framework for integrating OE into teacher education. By overcoming the methodological gaps of earlier initiatives, it lays the groundwork for targeted training pathways that advance a pedagogical culture more responsive to the interconnections between education and the natural environmen
Tax effect on Spanish SME optimum debt maturity structure
Get PDFThis paper analyzes the influence of the tax effect on Small and Medium-sized Enterprise (SME) debt maturity structure. This study builds a dynamic adjustment model which endogenizes optimum structure and assumes the existence of adjustment costs. Using Spanish data, the model is estimated using a system-GMM regression to a complete panel (11,028 firms) covering 1997-2004. SMEs adjust to their target at a speed of about 37% annually, the equivalent of employing about 20 months to cover only half of the existing gap. This rate is lower than those reported in other similar papers studying large companies with publicly tradable equity
Updating titanosaurian diversity (Sauropoda) from the Late Cretaceous of Spain: the fossil sites of Laño and Chera
No full textThree titanosaurian sauropods are well-known from the Campanian-Maastrichtian of the Ibero-Armorican Island (southwestern Europe): Lirainosaurus astibiae from Spain, and Ampelosaurus atacis and Atsinganosaurus velauciensis from France. However, a higher titanosaurian diversity has been suggested for this island, a hypothesis that has gained traction in recent years as a result of new discoveries in fossil sites from Spain and southern France. An estimation of the titanosaurian diversity in the late Campanian-early Maastrichtian of the Iberian Peninsula is made here on the basis of the available information from the three fossil sites that have yielded the best preserved fossil remains: Laño (Condado de Treviño), Chera (Valencia), and Lo Hueco (Cuenca). The results confirm the hypothesis of a higher titanosaurian diversity in the Iberian Peninsula: from one to, at least, three taxa. Moreover, we also suggest the presence of two different titanosaurian morphotypes in the site of Chera, with one of them representing Lirainosauru
La experimentación poético-musical en Fábula de Polifemo y Galatea (1698): diálogo aglutinante entre tradición y modernidad
Get PDFEl estudio pormenorizado de la dimensión poético-musical de Fábula de Polifemo y Galatea (1698), de Antonio de Zamora y Francesco di Russi, revela esta opera como paradigma inicial de la experimentación de las formas tradicionales hispanas con el lenguaje operístico italiano. En ella se observan piezas herederas de la práctica estrófica calderoniana como soportes textuales de recitativos y arias musicales. Esta apertura poético-musical partirá de la tradición como signo de identidad para engrandecerla a los parámetros culturales europeos, en la que tuvo mucho que ver la reina Mariana de Neoburgo
Relationship Between Online Trolling and Dark Tetrad Personality Traits: A Meta-Analysis
Get PDFBackground: Online trolling refers to a specific form of disruptive behavior in digital environments, aimed atinterrupting interactions, provoking other users, and drawing them into fruitless arguments. The Dark Tetrad personalitytraits (narcissism, Machiavellianism, psychopathy and sadism) have been linked to various forms of antisocial behaviorin virtual contexts. Method: A systematic literature review was conducted across the PsycINFO, PubMed, Scopus,ERIC, and Web of Science Core Collection databases to identify relevant studies examining these variables. A total of24 relevant articles from 11 countries were identified, comprising a combined sample size of 14,044 participants. Fourrandom-effects meta-analyses were performed using Pearson's r coefficients. Results: The results reveal a positiveassociation between all four personality traits and greater tendency to engage in online trolling. Meta-regressionanalyses show that the assessment instruments used moderated some of the observed associations. No evidence ofpublication bias was detected. Conclusions: In general, the relationship between Dark Tetrad traits and online trollingwas found to be positive, helping to explain individual differences in i
A reflecting sundial with cusps of the caustics on a straight line segment
Get PDFGiven a convex mirror curve and a sheaf of parallel incident rays, a caustic curve with at least one cusp appears. This is the principle on which the construction of reflecting sundials is founded. When the sheaf of parallel incident rays changes along the day, the cusp of the caustic curve traces out a new curve. The initial convex mirror curve for which its caustic curves have cusps along a straight line segment is studied. An intrinsic equation is obtained for it and, after numerical integration, the resulting curve is compared with the solution given by C. M. Lowne
El llit honest i l’oració devota de l’Emperadriu al "Tirant lo Blanc": textos i imatges d’Anunciacions amb secrets d’alcova
No full textL’article examina els antecedents i contextos de l’episodi de trobada d’Hipòlit amb l’Emperadriu de Constantinoble al Tirant lo Blanc (caps. 248-264) des de diferents punts de vista, en especial la comparació amb les imatges medievals d’Anunciacions. A més d’analitzar amb detall els moments d’aproximació cortesa d’Hipòlit, plens d’equivocs religiosos, s’estudien els precedents clàssics i religiosos del personatge de l’Emperadriu, així com les il·lustracions amb anuncis de concubinats perillosos que presenten els primers llibres de cavalleries manuscrits i impresos, i alguns tractats religiosos i mèdics romànics. Tot seguit, s’analitza el capítol principal de l’episodi (cap. 260) amb la preparació de la cambra i el llit per part de l’Emperadriu. Acció i descripció de l’alcova es relacionen amb el paper decisiu que van haver d’exercir les alcoves pintades en moltes Anunciacions durant els segles xiv i xv, on reïx el llit (thalamus Virginis) pel seu significat mariològic i cristològic. Com que la imatge de l’anunci de Gabriel a Maria, amb el rerefons d’aquest thalamus, va servir també com a model per a imaginar i il·lustrar anuncis o avisos de concepció extraordinària efectuats per esperits, àngels o dimonis, es proposa que Hipòlit i l’Emperadriu pogueren actuar com a contrafigures de l’Anunciació, dins d’un complex joc d’intertextualitats que afectaria episodis sacres i profans d’altres obres de ficció, com ara La Celestina
Justicia, derechos y la búsqueda de la felicidad: propuestas desde el activismo afroamericano
No full textEste artículo analiza el papel del derecho y la política en la configuración de las condiciones estructurales mínimas para la búsqueda de la felicidad, a partir de las reflexiones y experiencias de Frederick Douglass e Ida B. Wells. Se examinan críticamente los conceptos de no-violencia y no-discriminación como presupuestos jurídicos indispensables, vinculando el discurso normativo de los derechos fundamentales con prácticas históricas de exclusión racial y de género. Desde una perspectiva de filosofía jurídica, se reivindica la inclusión de voces activistas en el debate teórico sobre justicia, ciudadanía y derechos fundamentales