Experiencia de enseñanza online de “Bases de Datos” en una universidad presencial

La enseñanza online es una alternativa a la enseñanza presencial que es escogida por un número cada vez mayor de estudiantes universitarios, apareciendo como un complemento muy interesante en la enseñanza de las universidades presenciales. Sin embargo, la organización tradicional de la docencia de las asignaturas presenciales no resulta adecuada en entornos de enseñanza a distancia. En este artículo presentamos el resultado de la experiencia que, a lo largo de más de 6 años, hemos realizado en la enseñanza online de la asignatura “Bases de Datos”. Comparamos la organización de la enseñanza en los grupos presenciales con la del grupo de enseñanza online, los problemas que se plantean, las soluciones empleadas y el resultado obtenido.Peer Reviewe

Who changes the course of history? Historical agency in the narratives of Spanish pre-service primary teachers

Brief narratives created by pre-service teachers on a primary education degree course at the University of Murcia (Spain) were analysed to identify the ways in which they presented historical agents in European and Spanish history. The main units of analysis were categorized by the type of agent introduced in each narrative (individual, collective and institutional), then by identifying agents as either active or passive, and finally by describing the characteristics of their actions in terms of reasons and causes/consequences. The results reveal an emphasis on individual agents and the persistence of a superficial historical master narrative that perpetuates a distorted image of history

Glutathione – linking cell proliferation to oxidative stress

Significance: The multifaceted functions of reduced glutathione (gamma-glutamyl-cysteinyl-glycine; GSH) continue to fascinate plants and animal scientists, not least because of the dynamic relationships between GSH and reactive oxygen species (ROS) that underpin reduction/oxidation (redox) regulation and signalling. Here we consider the respective roles of ROS and GSH in the regulation of plant growth, with a particular focus on regulation of the plant cell cycle. Glutathione is discussed not only as a crucial low molecular weight redox buffer that shields nuclear processes against oxidative challenge but also a flexible regulator of genetic and epigenetic functions. Recent Advances: The intracellular compartmentalization of GSH during the cell cycle is remarkably consistent in plants and animals. Moreover, measurements of in vivo glutathione redox potentials reveal that the cellular environment is much more reducing than predicted from GSH/GSSG ratios measured in tissue extracts. The redox potential of the cytosol and nuclei of non-dividing plant cells is about -300 mV. This relatively low redox potential is maintained even in cells experiencing oxidative stress by a number of mechanisms including vacuolar sequestration of GSSG. We propose that regulated ROS production linked to glutathione-mediated signalling events are the hallmark of viable cells within a changing and challenging environment. Critical Issues: The concept that the cell cycle in animals is subject to redox controls is well established but little is known about how ROS and GSH regulate this process in plants. However, it is increasingly likely that similar redox controls exist in plants, although possibly through different pathways. Moreover, redox-regulated proteins that function in cell cycle checkpoints remain to be identified in plants. While GSH-responsive genes have now been identified, the mechanisms that mediate and regulate protein glutathionylation in plants remain poorly defined. Future Directions: The nuclear GSH pool provides an appropriate redox environment for essential nuclear functions. Future work will function on how this essential thiol interacts with the nuclear thioredoxin system and nitric oxide to regulate genetic and epigenetic mechanisms. The characterization of redox-regulated cell cycle proteins in plants, and the elucidation of mechanisms that facilitate GSH accumulation in the nucleus are keep steps to unravelling the complexities of nuclear redox controls

Energy Modelling and Calibration of Building Simulations: A Case Study of a Domestic Building with Natural Ventilation

[EN] In this paper, the building energy performance modelling tools TRNSYS (TRaNsient SYstem Simulation program) and TRNFlow (TRaNsient Flow) have been used to obtain the energy demand of a domestic building that includes the air infiltration rate and the effect of natural ventilation by using window operation data. An initial model has been fitted to monitoring data from the case study, building over a period when there were no heat gains in the building in order to obtain the building infiltration air change rate. After this calibration, a constant air-change rate model was established alongside two further models developed in the calibration process. Air change rate has been explored in order to determine air infiltrations caused by natural ventilation due to windows being opened. These results were compared to estimates gained through a previously published method and were found to be in good agreement. The main conclusion from the work was that the modelling ventilation rate in naturally ventilated residential buildings using TRNSYS and TRNSFlow can improve the simulation-based energy assessment.Aparicio-Fernández, C.; Vivancos, J.; Cosar-Jorda, P.; Buswell, RA. (2019). Energy Modelling and Calibration of Building Simulations: A Case Study of a Domestic Building with Natural Ventilation. Energies. 12(17):1-13. https://doi.org/10.3390/en12173360S1131217Grygierek, K., & Ferdyn-Grygierek, J. (2018). Multi-Objective Optimization of the Envelope of Building with Natural Ventilation. Energies, 11(6), 1383. doi:10.3390/en11061383Moran, P., Goggins, J., & Hajdukiewicz, M. (2017). Super-insulate or use renewable technology? Life cycle cost, energy and global warming potential analysis of nearly zero energy buildings (NZEB) in a temperate oceanic climate. Energy and Buildings, 139, 590-607. doi:10.1016/j.enbuild.2017.01.029Allouhi, A., El Fouih, Y., Kousksou, T., Jamil, A., Zeraouli, Y., & Mourad, Y. (2015). Energy consumption and efficiency in buildings: current status and future trends. Journal of Cleaner Production, 109, 118-130. doi:10.1016/j.jclepro.2015.05.139Cosar-Jorda, P., Buswell, R. A., & Mitchell, V. A. (2018). Determining of the role of ventilation in residential energy demand reduction using a heat-balance approach. Building and Environment, 144, 508-518. doi:10.1016/j.buildenv.2018.08.053Feijó-Muñoz, J., Poza-Casado, I., González-Lezcano, R. A., Pardal, C., Echarri, V., Assiego De Larriva, R., … Meiss, A. (2018). Methodology for the Study of the Envelope Airtightness of Residential Buildings in Spain: A Case Study. Energies, 11(4), 704. doi:10.3390/en11040704Domínguez-Amarillo, S., Fernández-Agüera, J., Campano, M. Á., & Acosta, I. (2019). Effect of Airtightness on Thermal Loads in Legacy Low-Income Housing. Energies, 12(9), 1677. doi:10.3390/en12091677Cheng, P. L., & Li, X. (2018). Air infiltration rates in the bedrooms of 202 residences and estimated parametric infiltration rate distribution in Guangzhou, China. Energy and Buildings, 164, 219-225. doi:10.1016/j.enbuild.2017.12.062Hou, J., Zhang, Y., Sun, Y., Wang, P., Zhang, Q., Kong, X., & Sundell, J. (2018). Air change rates at night in northeast Chinese homes. Building and Environment, 132, 273-281. doi:10.1016/j.buildenv.2018.01.030Zhai, Z. (John), Mankibi, M. E., & Zoubir, A. (2015). Review of Natural Ventilation Models. Energy Procedia, 78, 2700-2705. doi:10.1016/j.egypro.2015.11.355Han, G., Srebric, J., & Enache-Pommer, E. (2015). Different modeling strategies of infiltration rates for an office building to improve accuracy of building energy simulations. Energy and Buildings, 86, 288-295. doi:10.1016/j.enbuild.2014.10.028Laverge, J., & Janssens, A. (2013). Optimization of design flow rates and component sizing for residential ventilation. Building and Environment, 65, 81-89. doi:10.1016/j.buildenv.2013.03.019Bhandari, M., Hun, D., Shrestha, S., Pallin, S., & Lapsa, M. (2018). A Simplified Methodology to Estimate Energy Savings in Commercial Buildings from Improvements in Airtightness. Energies, 11(12), 3322. doi:10.3390/en11123322Pisello, A. L., Castaldo, V. L., Taylor, J. E., & Cotana, F. (2016). The impact of natural ventilation on building energy requirement at inter-building scale. Energy and Buildings, 127, 870-883. doi:10.1016/j.enbuild.2016.06.023Tronchin, L., Fabbri, K., & Bertolli, C. (2018). Controlled Mechanical Ventilation in Buildings: A Comparison between Energy Use and Primary Energy among Twenty Different Devices. Energies, 11(8), 2123. doi:10.3390/en11082123Ashdown, M. M. A., Crawley, J., Biddulph, P., Wingfield, J., Lowe, R., & Elwell, C. A. (2019). Characterising the airtightness of dwellings. International Journal of Building Pathology and Adaptation, 38(1), 89-106. doi:10.1108/ijbpa-02-2019-0024Crawley, J., Wingfield, J., & Elwell, C. (2018). The relationship between airtightness and ventilation in new UK dwellings. Building Services Engineering Research and Technology, 40(3), 274-289. doi:10.1177/0143624418822199Jones, B., Das, P., Chalabi, Z., Davies, M., Hamilton, I., Lowe, R., … Taylor, J. (2015). Assessing uncertainty in housing stock infiltration rates and associated heat loss: English and UK case studies. Building and Environment, 92, 644-656. doi:10.1016/j.buildenv.2015.05.033Schulze, T., & Eicker, U. (2013). Controlled natural ventilation for energy efficient buildings. Energy and Buildings, 56, 221-232. doi:10.1016/j.enbuild.2012.07.044Stavridou, A. D., & Prinos, P. E. (2017). Unsteady CFD Simulation in a Naturally Ventilated Room with a Localized Heat Source. Procedia Environmental Sciences, 38, 322-330. doi:10.1016/j.proenv.2017.03.087LEEDR Project Home Energy Datasethttps://repository.lboro.ac.uk/articles/LEEDR_project_home_energy_dataset/6176450Met Office Integrated Data Archive System (MIDAS) Land and Marine Surface Stations Data (1853-current)http://catalogue.ceda.ac.uk/uuid/220a65615218d5c9cc9e4785a3234bd0Buswell, R., Webb, L., Mitchell, V., & Leder Mackley, K. (2016). Multidisciplinary research: should effort be the measure of success? Building Research & Information, 45(5), 539-555. doi:10.1080/09613218.2016.1194601National Grid UKhttps://www.nationalgrid.com/uk/gas/market-operations-and-data/calorific-value-cvHome Heating Guide: Boiler Efficiency Tableshttps://www.homeheatingguide.co.uk/efficiency-tablesRuiz, G., & Bandera, C. (2017). Validation of Calibrated Energy Models: Common Errors. Energies, 10(10), 1587. doi:10.3390/en10101587Hong, T., Piette, M. A., Chen, Y., Lee, S. H., Taylor-Lange, S. C., Zhang, R., … Price, P. (2015). Commercial Building Energy Saver: An energy retrofit analysis toolkit. Applied Energy, 159, 298-309. doi:10.1016/j.apenergy.2015.09.002Nasir, Z. A., & Colbeck, I. (2013). Particulate pollution in different housing types in a UK suburban location. Science of The Total Environment, 445-446, 165-176. doi:10.1016/j.scitotenv.2012.12.042Dimitroulopoulou, C. (2012). Ventilation in European dwellings: A review. Building and Environment, 47, 109-125. doi:10.1016/j.buildenv.2011.07.01

Efecto del peróxido de hidrógeno en la expresión de proteínas durante la germinación

Comunicaciones a congreso

Cambios inducidos por Plum pox virus en el proteoma de plantas de melocotonero

Comunicaciones a congreso

Experiencia de enseñanza online de “Bases de Datos” en una universidad presencial

La enseñanza online es una alternativa a la enseñanza presencial que es escogida por un número cada vez mayor de estudiantes universitarios, apareciendo como un complemento muy interesante en la enseñanza de las universidades presenciales. Sin embargo, la organización tradicional de la docencia de las asignaturas presenciales no resulta adecuada en entornos de enseñanza a distancia. En este artículo presentamos el resultado de la experiencia que, a lo largo de más de 6 años, hemos realizado en la enseñanza online de la asignatura “Bases de Datos”. Comparamos la organización de la enseñanza en los grupos presenciales con la del grupo de enseñanza online, los problemas que se plantean, las soluciones empleadas y el resultado obtenido.Este trabajo ha sido parcialmente financiado por la Escuela Técnica Superior de Ingeniería Informática y por el PAID-04-10 de la Universidad Politécnica de Valencia

Nitrate- and nitric oxide-induced plant growth in pea seedlings is linked to antioxidative metabolism and the ABA/GA balance

This study looks at the effects of potassium nitrate (KNO3) and sodium nitroprusside (SNP), a nitric oxide (NO)-donor, on the development, antioxidant defences and on the abscisic acid (ABA) and gibberellin (GA) levels inpea seedlings. Results show that 10 mM KNO3and 50μM SNP stimulate seedling fresh weight (FW), althoughthis effect is not reverted by the action of 2-4-carboxyphenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide(cPTIO), a NO-scavenger.The KNO3treatment increased peroxidase (POX) and ascorbate oxidase (AOX) activities. SNP, on the otherhand, reduced monodehydroascorbate reductase (MDHAR) activity and produced a significant increase in su-peroxide dismutase (SOD), POX and AOX activities. The“KNO3plus cPTIO”treatment increased ascorbateperoxidase (APX), MDHAR, glutathione reductase (GR) and SOD activities, but POX activity decreased in re-lation to the KNO3treatment. The“SNP plus cPTIO”treatment increased APX and MDHAR activities, whereas ahuge decrease in POX activity occurred. Both the KNO3and the SNP treatments increased reduced ascorbate(ASC) concentrations, which reached control values in the presence of cPTIO. All treatments increased thedehydroascorbate (DHA) level in pea seedlings, leading to a decrease in the redox state of ascorbate. In the“KNO3plus cPTIO”treatment, an increase in the redox state of ascorbate was observed. Glutathione contents,however, were higher in the presence of SNP than in the presence of KNO3. In addition, KNO3produced anaccumulation of oxidised glutathione (GSSG), especially in the presence of cPTIO, leading to a decrease in theredox state of glutathione. The effect of SNP on reduced glutathione (GSH) levels was reverted by cPTIO, sug-gesting that NO has a direct effect on GSH biosynthesis or turnover.Both the KNO3and SNP treatments produced an increase in GA4 and a decrease in ABA concentrations, andthis effect was reverted in the presence of the NO-scavenger. Globally, the results suggest a relationship betweenantioxidant metabolism and the ABA/GA balance during early seedling growth in pea. The results also suggest arole for KNO3and NO in the modulation of GA4 and ABA levels and antioxidant metabolism in pea seedlings.Furthermore, this effect correlated with an increase in the biomass of the pea seedlingsinfo:eu-repo/semantics/acceptedVersio

Proposing 3D Thermal Technology for Heritage Building Energy Monitoring

[EN] The energy monitoring of heritage buildings has, to date, been governed by methodologies and standards that have been defined in terms of sensors that record scalar magnitudes and that are placed in specific positions in the scene, thus recording only some of the values sampled in that space. In this paper, however, we present an alternative to the aforementioned technologies in the form of new sensors based on 3D computer vision that are able to record dense thermal information in a three-dimensional space. These thermal computer vision-based technologies (3D-TCV) entail a revision and updating of the current building energy monitoring methodologies. This paper provides a detailed definition of the most significant aspects of this new extended methodology and presents a case study showing the potential of 3D-TCV techniques and how they may complement current techniques. The results obtained lead us to believe that 3D computer vision can provide the field of building monitoring with a decisive boost, particularly in the case of heritage buildingsThis research was funded by the European Regional Development Fund (SBPLY/19/180501/000094 project) and the Ministry of Science and Innovation (PID2019-108271RB-C31 and PID2019108271RB-C33).Adan, A.; Pérez, V.; Vivancos, J.; Aparicio Fernandez, CS.; Prieto, SA. (2021). Proposing 3D Thermal Technology for Heritage Building Energy Monitoring. Remote Sensing. 13(8):1-25. https://doi.org/10.3390/rs13081537S12513

Enfermedad de Urbach-Wiethe: presentación de un caso con afectación bucal tratado con láser de CO2

Se presenta un caso de enfermedad de Urbach-Wiethe o lipoidoproteinosis con extensas lesiones orales que dificultaban la masticación. Se efectuó un remodelado gingival con fotobisturí de láser C02 en dos tiempos, con lo que se obtuvo un resultado sumamente satisfactorio. Se describen las principales características clínicas de esta rara enfermedad y se analiza la utilidad del láser C02 en la cirugía bucal