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Optimization of second‐generation lactic acid from corn stover by alkaline catalysis in subcritical water reaction medium
Full text linkThe optimization of hydrothermal lactic acid (LA) production from corn stover using Ca(OH)2 as catalyst was investigated. Initial studies with a 9 g L−1 glucose solution, and different Ca(OH)2 concentrations, in the range of 0.025–0.1 M, identified 0.075 M as the optimal concentration. Ca(OH)2 acted both as catalyst and reactant, neutralizing LA, and other organic acids produced, primarily acetic and formic acids. Excess Ca(OH)2 was required to maintain the alkaline environment necessary for LA production, achieving 3.5 g LA L−1 with a 40% yield. Lactic acid production from corn stover was studied at temperatures ranging from 90 to 260 °C with 0.075 M Ca(OH)2 and a biomass loading of 5 wt%. Higher temperatures increased LA production reaching 5.9 g LA L−1 with 15.1% of yield at 260 °C. The lower value of the yield compared with that obtained from glucose was attributed to the lower OH−/sugar monomer molar ratio, which was 3 for glucose, but only 0.65 for corn stover. To counteract organic acid formation, Ca(OH)2 concentrations up to 1.5 M were tested. The OH−/sugar monomer molar ratio emerged as a key design parameter, with an optimum value of 2.61, resulting in 12.4 g LA L−1 and 32% yield. This ratio compensates Ca(OH)2 consumption in neutralization reactions and minimizes excess base, which primarily remained in the solid residue owing to the low solubility of Ca(OH)2 in water. This approach also achieves minimal mass intensity, with 5.8 kg of reactants kg−1 of LA, with unnecessary reactant consumption.This work was supported by the Agencia Estatal de Investigación (grant numbers PID2022-136385OB-I00, TED2021-129311B-I00), the Junta de Castilla y León and the European Regional Development Fund (grant number BU027P23). A.E. Illera's postdoctoral contract was funded by BU027P23. H. Candela's pre-doctoral contract was funded by the Junta de Castilla y León and the European Social Fund (ORDEN EDU/1009/2024). P. Barea's pre-doctoral contract is funded by JCyL and the European Social Fund (ORDEN EDU/1868/2022)
Original and processed dataset of malware propagation in IoT networks with a SIR epidemiological model
No full textThe dataset contains the data generated by an individual SIR model in an IoT network simulated by a graph for 20 time steps. This dataset is designed for training graph-based AI models for malware propagation detection in IoT networks.This publication is part of the AI4SECIoT project ("Artificial Intelligence for Securing IoT Devices"), funded by the National Cybersecurity Institute (INCIBE), derived from a collaboration agreement signed between the National Institute of Cybersecurity (INCIBE) and the University of Burgos. This initiative is carried out within the framework of the Recovery, Transformation and Resilience Plan funds, financed by the European Union (Next Generation), the project of the Government of Spain that outlines the roadmap for the modernization of the Spanish economy, the recovery of economic growth and job creation, for solid, inclusive and resilient economic reconstruction after the COVID19 crisis, and to respond to the challenges of the next decade
Diseño de un programa de intervención cognitiva basado en estrategias pedagógicas para personas mayores con ictus en la arteria cerebral posterior
Full text linkEste Trabajo de Fin de Grado tiene como finalidad diseñar una propuesta de intervención educativa
basada en estrategias pedagógicas para la estimulación cognitiva de personas mayores de 60 años
que han sufrido un ictus en la arteria cerebral posterior (ACP). A partir de una revisión teórica
sobre las secuelas cognitivas y emocionales derivadas de este tipo de accidente cerebrovascular,
se analizan las funciones más frecuentemente afectadas, como la memoria, la atención, la
percepción visual, el lenguaje, las praxias y las funciones ejecutivas. Se destacan también los
efectos que estas alteraciones pueden tener sobre la autonomía y la calidad de vida de la persona,
así como la importancia de un acompañamiento educativo que contemple tanto la dimensión
cognitiva como la emocional.
El trabajo culmina con el desarrollo de una guía práctica de actividades estructuradas que, desde
un enfoque pedagógico, personalizado y significativo, busca favorecer la recuperación funcional,
reforzar la autoestima y promover la participación activa de la persona en su entorno. Esta
propuesta pretende ser un recurso accesible y útil para profesionales del ámbito socioeducativo,
así como para familias y personas cuidadoras, integrando técnicas adaptadas al perfil, las
necesidades y los intereses de cada persona. En conjunto, se entiende la intervención educativa
como una vía complementaria y necesaria para apoyar el proceso de estimulación cognitiva y
emocional tras un ictus.This Final Degree Project aims to design an educational intervention proposal based on
pedagogical strategies for the cognitive stimulation of people over 60 years of age who have
suffered a stroke in the posterior cerebral artery (PCA). Based on a theoretical review of the
cognitive and emotional sequelae derived from this type of stroke, the most frequently affected
functions are analysed, such as memory, attention, visual perception, language, praxias and
executive functions. The effects that these alterations can have on the person's autonomy and
quality of life are also highlighted, as well as the importance of educational support that takes into
account both the cognitive and emotional dimensions.
The work culminates with the development of a practical guide of structured activities that, from
a pedagogical, personalised and meaningful approach, seeks to favour functional recovery,
reinforce self-esteem and promote the active participation of the person in their environment. This
proposal aims to be an accessible and useful resource for professionals in the socio-educational
field, as well as for families and carers, integrating techniques adapted to the profile, needs and
interests of each person. Overall, educational intervention is understood as a complementary and
necessary way to support the process of cognitive and emotional stimulation after a stroke
Drawings of Burgos in the 18th Century: Enlightenment travellers in the creation of the city's symbols
No full textEn la historia gráfica de Burgos hay pocos dibujos que expresen una forma diferente de ver la ciudad. La vista de Burgos publicada en Civitates Orbis Terrarum en 1572 mantuvo su influencia hasta finales del siglo XVIII, cuando los libros de viajes empezaron a difundir una nueva forma de representar el conjunto de la ciudad mediante dibujos de sus principales lugares y monumentos. En Burgos esta transición gráfica se inició con los levantamientos arquitectónicos del libro España Sagrada del padre Flórez y se consolidó con los dibujos publicados en Viage de España de Antonio Ponz que fue el principal libro de viajes de la Ilustración española. A finales del siglo xviii y principios del XIX, los dibujos realizados por Henry Swinburne y el equipo de Alexandre Laborde nos dejaron el mejor legado gráfico de la ciudad en esta etapa y prepararon el camino para los artistas románticos del siglo XIX.In the graphic history of Burgos, there are few drawings that express a different way of seeing the city. The view of Burgos published in Civitates Orbis Terrarum in 1572 kept its influence until the late 18th century, when travel books began to disseminate a new way of representing the city as a whole through drawings of its main sites and monuments. In Burgos, this graphic transition began with the architectural surveys included in the book España Sagrada by Enrique Flórez and it was consolidated with the drawings published in Viage de España by Antonio Ponz, the main travel book of the Spanish Enlightenment. In the late 18th and early 19th centuries, the drawings made by Henry Swinburne and Alexandre Laborde’s team left us the best graphic legacy of the city in this period and paved the way for the Romantic artists of the 19th century
La licitación en la compra pública de innovación y circular
No full textLa contratación pública debe contribuir a un sistema de producción y consumo acorde con los objetivos políticos vinculados a la economía circular, tanto por su papel ejemplarizante, como por resultar un motor esencial a favor de la innovación
La teatralidad de Valor, agravio y mujer de Ana Caro: una reconstrucción escénica desde la semiótica teatral
No full textEste TFG analiza la teatralidad de la obra Amor, agravio y mujer de Ana Caro de
Mallén aplicando la metodología de la semiótica y la semiología teatral. Se plantea una
hipótesis de puesta en escena verosímil en el contexto del teatro del siglo XVII. El análisis
abarca didascalias, espacio escénico, vestuario y efectos sonoros, con el fin de proponer
una interpretación escénica coherente con las convenciones teatrales de la época.This research paper analyses the theatricality of Amor, agravio y mujer by Ana
Caro de Mallén using the methodology of semiotics and theatrical semiology. It presents
a plausible staging hypothesis within the context of 17th-century theatre. The analysis
covers stage directions, scenic space, costumes, and sound effects, aiming to propose a
stage interpretation consistent with the theatrical conventions of the period
Tephra Deposits of the Tajogaite Volcano, La Palma: Changes of Magnetic Properties Through the 2021 Eruption
No full textWe report the results of a rockmagnetic study of tephra material produced by the Tajogaite volcano, in La Palma (Canary Islands), during 19 September through 13 December 2021. Our magnetic analysis reveals a change of rock magnetic properties through the eruption. Ti-magnetite particles are the main magnetic carrier in both lapilli and ash, and significant grain size changes are observed through the magnetic properties. Notably, we notice a progressive decrease in bulk magnetic susceptibility, largely due to the change in concentration of magnetite nanolite particles. Superparamagnetism is apparent in particular during the early stages of the volcanic activity, and the behavior is progressively masked upsection due to the abundance of Ti-magnetite SD and PSD particles. We hypothesize that the reported edifice collapse occurred on 25 September and a coeval, abrupt change of magnetic properties, are both related to the viscosity change of the magma feeding the volcano
