43 research outputs found

    Un proceso de aprendizaje de integrales múltiples con el uso de herramientas visuales

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    Se propone una serie de actividades para el aprendizaje del concepto de integración múltiple como una estrategia para el cálculo de área entre dos curvas y posteriormente en el cálculo de volumen. La propuesta se apoya en un enfoque constructivista y en el uso de la computadora para que el estudiante realice la construcción de integrales múltiples y manipule límites de integración de acuerdo con la geométrica de los problemas que se presentan

    Training of University Lecturers in Information and Communication Technology at the University of Salamanca

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    En el presente artículo analizamos y presentamos los principales resultados de una revisión realizada sobre tres temáticas relacionadas con la formación del profesorado en Tecnologías de la Información y Comunicación (TIC). La primera se centra en los planes de formación docente universitaria organizados por la Universidad de Salamanca (USAL), en torno a este tema. La segunda se orienta a conocer la importancia que se concede a las TIC en los Proyectos de Innovación diseñados y desarrollados por los profesores universitarios a lo largo de los últimos años en dicha universidad. Finalmente, presentamos los principales resultados extraídos de una investigación amplia, en la que se estudió, entre otras múltiples variables, la relacionada con la formación del profesorado universitario para la integración curricular de las tecnologías.This article shows the main results out of a documentary research study that analyzes three interrelated topics in the field of Teacher Education and ICT. The first analysis focuses on the University Teacher Training programs organized by the University of Salamanca (USAL). The second one examines the status and importance that is given to the use of ICT in Innovation Projects that have been designed and implemented by the university teaching staff during the last five years. Finally, and as part of a broader research project, the last study reports on University Lecturers’ training for ICT integration in the curriculum.peerReviewe

    The lava delta of Igueste de San Andrés (Anaga, Tenerife, Canary Islands)

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    Los restos de un delta de lava afloran dentro de la Serie I Media del Macizo de Anaga, en la parte nororiental de la isla de Tenerife (Islas Canarias), en el tramo bajo del Barranco de Igueste de San Andrés, a unos 90 metros de altura. El delta está formado principalmente por flujos de lavas basálticas de baja viscosidad que cubren lavas almohadilladas, brechas de fragmentos de almohadillas, más o menos resedimentadas, e hialoclastitas, ordenadas en foresets con buzamientos altos hacia el sur. Cubren erosivamente el delta aglomerados constituidos por fragmentos procedentes de las diferentes facies del delta y niveles de lavas y piroclásticos subaéreos, formados por pequeñas erupciones estrombolianas costerasThe remains of a lava delta occur within the volcanic succession called Serie I Media in the Anaga Massif, in the northeastern part of Tenerife Island (Canary Islands). The outcrop is located in the lower part of the ravine of Igueste de San Andrés, at about 90 meters high. The delta is formed mainly of flows of low viscosity basaltic lavas that cover pillowlavas, roughly resedimented pillow-fragment breccias, and hyaloclastites, in foreset bodies with high dips towards the S. The delta is covered by agglomerates constituted by fragments from the different facies of the delta and levels of lavas and subaerial pyroclasts, formed of small coastal strombolian eruption

    JKST6, a novel multikinase modulator of the BCR-ABL1/STAT5 signaling pathway that potentiates direct BCR-ABL1 inhibition and overcomes imatinib resistance in chronic myelogenous leukemia

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    Chronic myelogenous leukemia (CML) is a hematological malignancy that highly depends on the BCR-ABL1/STAT5 signaling pathway for cell survival. First-line treatments for CML consist of tyrosine kinase inhibitors that efficiently target BCR-ABL1 activity. However, drug resistance and intolerance are still therapeutic limitations in Ph+ cells. Therefore, the development of new anti-CML drugs that exhibit alternative mechanisms to overcome these limitations is a desirable goal. In this work, the antitumoral activity of JKST6, a naphthoquinone-pyrone hybrid, was assessed in imatinib-sensitive and imatinib-resistant human CML cells. Live-cell imaging analysis revealed JKST6 potent antiproliferative activity in 2D and 3D CML cultures. JKST6 provoked cell increase in the subG1 phase along with a reduction in the G0/G1 phase and altered the expression of key proteins involved in the control of mitosis and DNA damage. Rapid increases in Annexin V staining and activation/cleavage of caspases 8, 9 and 3 were observed after JKST6 treatment in CML cells. Of interest, JKST6 inhibited BCR-ABL1/STAT5 signaling through oncokinase downregulation that was preceded by rapid polyubiquitination. In addition, JKST6 caused a transient increase in JNK and AKT phosphorylation, whereas the phosphorylation of P38-MAPK and Src was reduced. Combinatory treatment unveiled synergistic effects between imatinib and JKST6. Notably, JKST6 maintained its antitumor efficacy in BCR-ABL1-T315I-positive cells and CML cells that overexpress BCR-ABL and even restored imatinib efficacy after a short exposure time. These findings, together with the observed low toxicity of JKST6, reveal a novel multikinase modulator that might overcome the limitations of BCR-ABL1 inhibitors in CML therapy.This research has been funded by Spanish Ministry of Economy and Competitiveness - MINECO - (SAF 2015–65113-C2–1-R and RTI2018–094356-B-C21 to AEB, SAF2015–65113-C2–2 to LFP, SAF2017–88026-R to JL) with the co-funding of European Regional Development Fund (EU-ERDF), Canary Islands Government (CEI2018–23/ACIISI to BG, CEI2019–08/ACIISI to BG and LFP, ProID2021010037 to AEB, LFP and BG) and "Juan de la Cierva Incorporacion" Grant Program from the Ministry of Science, Innovation and Universities (IJC2018-035193-I to CR). This project has been also supported by Alfredo Martin-Reyes Foundation (Arehucas)-Canary Islands Foundation for Cancer Research (FICIC). HAT is recipient of a predoctoral program grant from ULPGC (2016). JCM was funded by the Instituto de Salud Carlos III through a Miguel Servet program (CPII17/ 00015)

    Inventory of Geological Sites of Interest in the Canary Islands

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    En el marco de proyecto de investigación LIGCANARIAS (2018-2021) se ha realizado el Inventario de Lugares de Interés Geológico de las Islas Canarias, que forma parte del Inventario Español de Lugares de Interés Geológico (IELIG) para el dominio de este archipiélago. El inventario ha empleado la metodología del IELIG adaptada a un dominio geológico eminentemente volcánico, partiendo de los contextos geológicos regionales. Consta de 300 LIG: 53 en Gran Canaria, 47 en Tenerife, 54 en Lanzarote y Archipiélago Chinijo, 40 en Fuerteventura, 29 en La Palma, 23 en La Gomera y 21 en El Hierro. La principal novedad con respecto a los inventarios en otros dominios geológicos es la identificación de 33 LIG submarinos.Within the framework of the LIGCANARIAS research project (2018-2021), the Inventory of Geological Sites of Interest of the Canary Islands has been carried out, which is part of the Spanish Inventory of Places of Geological Interest (IELIG) for the domain of this archipelago. The inventory has used the IELIG methodology adapted to an eminently volcanic geological domain, based on regional geological frameworks. It consists of 300 geosites: 53 in Gran Canaria, 47 in Tenerife, 54 in Lanzarote and Chinijo Archipelago, 40 in Fuerteventura, 29 in La Palma, 23 in La Gomera and 21 in El Hierro. The main novelty with respect to the inventories in other geological domains is the identification of 33 submarine geosites.Depto. de Mineralogía y PetrologíaFac. de Ciencias GeológicasTRUEAgencia Canaria de Investigación, Innovación y Sociedad de la Informaciónpu
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