9300 research outputs found
Sort by
El contrato de franquicia. Contratos de financiación: el contrato de leasing
No full textEste capítulo forma parte del tema “Régimen jurídico de la competencia y protección de signos distintivos" de la asignatura Derecho Mercantil, impartida en el Primer curso de ADE
Valorization of brewer’s spent grain by furfural recovery/removal from subcritical water hydrolysates by pervaporation
Get PDFPóster presentado en: 19th European meeting on Supercritical Fluids (EMSF 2023), organized by the International Society for the Advancement of Supercritical Fluids, Budapest, 21-24 may, 2023Subcritical water and pervaporation showed to be an effective combination for the production and recovery of biomass derived furfuralThis work was supported by the AEI [PID2019-104950RB-00, PID2020-116716RJ-I00, TED2021-129311B-I00, PDC2022-133443-I00] and JCyL and ERDF [BU050P20]. P. Alonso-Riaño and P. Barea acknowledge JCyL and ESF [ORDEN EDU/556/2019] and [ORDEN EDU/1868/2022], respectively. A. Bermejo-López to the Margarita Salas grant [MARSA22/03] and R. Melgosa the Beatriz Galindo Fellowship [BG20/00182]
Extraction of Marine Collagen Derivatives from Hoplostethus mediterraneus Cuvier, 1829 Using a Pressurized Water - CO2 System
Get PDFTrabajo presentado en: 19th European meeting on Supercritical Fluids (EMSF 2023), organized by the International Society for the Advancement of Supercritical Fluids, Budapest, 21-24 may, 2023The study indicated a new approach for producing nutritional and functional biomaterial from a relatively
unutilized marine source while contributing to environmentally responsible and sustainable practices of
efficient resource use.This work was supported by TUBITAK 2219 (Post-doc international scholarships programme) and the Agencia Estatal de Investigación (Spain) [grant numbers PID2019–104950RB-I00, TED2021-129311B-I00 and PDC2022-133443-I00] and the Junta de Castilla y León (JCyL) and the European Regional Development Fund (ERDF) [grant number BU050P20]. RM is supported by a Beatriz Galindo Research Fellowship [BG20/00182]
Hydrogen uptake and diffusion kinetics in a quenched and tempered low carbon steel: experimental and numerical study
Get PDFTo better understand hydrogen uptake kinetics, electrochemical permeation tests have been performed in a quenched and tempered low-alloy steel. Hydrogen uptake and transport has been studied with three different surface roughness, in four different solutions (1 M H2SO4, 1 M H2SO4+As2O3, 0.1 M NaOH and 3.5% NaCl) and two different hydrogen charging current densities (1 and 5 mA/cm2). A strong effect of the charging solution, current density and surface roughness has been demonstrated. In 1 M H2SO4 + As2O3 solution and 5 mA/cm2, hydrogen recombination on the surface of the samples is strongly reduced and interstitial diffusion prevails due to the trap saturation (
). However, in 1 M H2SO4, 0.1 M NaOH and 3.5% NaCl, hydrogen transport is dominated by trapping and detrapping processes (
). Permeation transients are numerically reproduced through Finite Element simulations and compared to the experimental results. The relationship between hydrogen diffusion kinetics at the microstructural level and surface effects is clearly established by a mapping strategy obtained from the wide range of experimental results, combined with a numerical approach.The authors would like to thank the Spanish Government for the financial support received to perform the research projects RTI2018-096070-B-C33 and PID2021-124768OB-C21. This work was supported by the Regional Government of Castilla y León (Junta de Castilla y León) and by the Ministry of Science and Innovation MICIN and the European Union Next Generation EU/PRTR (MR4W.P2 and MR5W.P3). L.B. Peral is also grateful for his Margarita Salas Postdoctoral contract (Ref.: MU-21-UP2021-030) funded by the University of Oviedo through the Next Generation European Union
Isolation and Quantification of Mandelonitrile from Arabidopsis thaliana Using Gas Chromatography/Mass Spectrometry
Get PDFProtocoloMandelonitrile is a nitrogen-containing compound, considered an essential secondary metabolite. Chemically, it is
a cyanohydrin derivative of benzaldehyde, with relevant functions in different physiological processes including
defense against phytophagous arthropods. So far, procedures for detecting mandelonitrile have been effectively
applied in cyanogenic plant species such as Prunus spp. Nevertheless, its presence in Arabidopsis thaliana,
considered a non-cyanogenic species, has never been determined. Here, we report the development of an accurate
protocol for mandelonitrile quantification in A. thaliana within the context of A. thaliana–spider mite interaction.
First, mandelonitrile was isolated from Arabidopsis rosettes using methanol; then, it was derivatized by silylation
to enhance detection and, finally, it was quantified using gas chromatography–mass spectrometry. The selectivity
and sensitivity of this method make it possible to detect low levels of mandelonitrile (LOD 3 ppm) in a plant species
considered non-cyanogenic that, therefore, will have little to no cyanogenic compounds, using a small quantity of
starting material (≥ 100 mg).This work was supported by funds of “La Caixa” Foundation (LCF/PR18/51130007) and Ministerio de Universidades-European Union in the frame of NextGenerationEU RD 289/2021 (Universidad Politécnica de Madrid)
Propuesta de mejora de la productividad de la troqueladora plana automática ASAHI AP 2100
No full textEn el presente trabajo se va a estudiar la productividad de la troqueladora plana
automática Asahi AP 2100 en relación con las máquinas que están en su línea de
proceso, la impresora Göpfert y máquinas complementarias. El objetivo es obtener el
valor de 3000 m2
/ hora , actualmente el dato de productividad está en torno a los
2300/2400 m2
/ hora. La productividad se intentará mejorar a través de diversos
análisis, empezando por un análisis de productividad, seguido de análisis de los
tiempos de parada y tiempos improductivos, ya que, son un gran problema para la
productividad. Reduciendo estos tiempos de parada y tiempos improductivos se espera
conseguir un aumento significativo de la productividad.In this study, the productivity of the Asahi AP 2100 automatic flat die cutter will be
examined in relation to the machines in its process line, the Göpfert printer and
complementary machines. The objective is to achieve a productivity rate of 3000
m2/hour, whereas the current productivity data stands around 2300/2400 m2/hour.
Productivity improvement will be pursued through various analyses, starting with a
productivity analysis, followed by an examination of downtime and unproductive
times, as they significantly affect productivity. By reducing these downtime and
unproductive times, a significant increase in productivity is expected
Immersive Virtual Reality in Cultural Heritage Dissemination: A Comprehensive Application for Novice Users
No full textComunicación presentada en International Conference on eXtended Reality (XR Salento 2023), celebrado en Lecce, Italia durante los días 6-9 de septiembre de 2023.This paper discusses the increasing relevance of immersive Virtual Reality (iVR) technology in society and its emerging applications, particularly in Cultural Heritage (CH) dissemination. However, the diversification of iVR experiences has led to a need for an application that summarizes the most common types of experiences to familiarize novice users with iVR. To address this need, an iVR application has been developed that presents the four most common types of iVR experiences: Passive, Explorative, Explorative Interaction, and Interactive. The experience includes different reconstructed CH environments and objects showcasing the possibilities for the dissemination of CH using this technology. The application is divided into four levels, and its key design factors are as follows: 1) one type of iVR experience for each level, 2) simple interactions that become more complex as the user progresses, 3) short duration and time-limited progression between levels, 4) development for standalone iVR devices, and 5) different types of reconstructed heritage showcased at each level. The experience was tested in exhibitions and achieved high performance on standalone iVR devices. Usability results are expected to be achieved in the future
