50 research outputs found

    Development of innovative analytical methodologies, mainly focused on X-ray fluorescence spectrometry, to characterise building materials and their degradation processes based on the study performed in the historical building Punta Begoña Galleries (Getxo, Basque Country, Spain)

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    282 p.The characterisation and preservation of Cultural Heritage is of great importance in order to understand and preserve human evolution and history. Mortars are usually the main material employed in the construction of buildings belonging to Cultural Heritage. These building materials are multi-layered complex systems, often characterised by an inhomogeneous structure with a composition varying surprisingly depending on their geographical location and time period. The characterisation of the original composition and the definition of the degradation reactions of mortars can give assistance to restorers and can lead to propose new ways for future conservation (e.g. preventive conservation). In this PhD. Thesis, new Analytical Methodologies have been developed for the characterisation of mortars and the diagnosis of pathologies present on them, trying to encompass some of the most important facts present in the current evolution of the science dedicated to Cultural Heritage. Portable devices based on elemental and molecular spectroscopic techniques have been demonstrated as powerful tools to extract reliable conclusions without extracting any sample, which is of high importance when dealing with objects belonging to Cultural Heritage. On the one hand, different new easy and cost-effective natural and artificial passive samplers useful for the characterisation of the increasing atmospheric Particulate Matter in the current atmosphere are proposed in order to study the effect of its deposition over the building materials. On the other hand, the advantages of the increasing in situ non-destructive analytical techniques are also shown as well as the development of new X-ray fluorescence based quantification methodologies as an easy, cost effective and Green Analytical Chemistry option to other more traditionally employed techniques for the characterisation of building materials and their degradation products. At the time of starting the project of this PhD. Thesis, the University of the Basque Country UPV/EHU and the City Council of Getxo (Basque Country, Spain) signed an agreement to recover a highly degraded historical building, the Punta Begoña Galleries. The proposed methodologies have been developed based on the materials from this building and the degradation processes that are suffering

    Development of innovative analytical methodologies, mainly focused on X-ray fluorescence spectrometry, to characterise building materials and their degradation processes based on the study performed in the historical building Punta Begoña Galleries (Getxo, Basque Country, Spain)

    Get PDF
    282 p.The characterisation and preservation of Cultural Heritage is of great importance in order to understand and preserve human evolution and history. Mortars are usually the main material employed in the construction of buildings belonging to Cultural Heritage. These building materials are multi-layered complex systems, often characterised by an inhomogeneous structure with a composition varying surprisingly depending on their geographical location and time period. The characterisation of the original composition and the definition of the degradation reactions of mortars can give assistance to restorers and can lead to propose new ways for future conservation (e.g. preventive conservation). In this PhD. Thesis, new Analytical Methodologies have been developed for the characterisation of mortars and the diagnosis of pathologies present on them, trying to encompass some of the most important facts present in the current evolution of the science dedicated to Cultural Heritage. Portable devices based on elemental and molecular spectroscopic techniques have been demonstrated as powerful tools to extract reliable conclusions without extracting any sample, which is of high importance when dealing with objects belonging to Cultural Heritage. On the one hand, different new easy and cost-effective natural and artificial passive samplers useful for the characterisation of the increasing atmospheric Particulate Matter in the current atmosphere are proposed in order to study the effect of its deposition over the building materials. On the other hand, the advantages of the increasing in situ non-destructive analytical techniques are also shown as well as the development of new X-ray fluorescence based quantification methodologies as an easy, cost effective and Green Analytical Chemistry option to other more traditionally employed techniques for the characterisation of building materials and their degradation products. At the time of starting the project of this PhD. Thesis, the University of the Basque Country UPV/EHU and the City Council of Getxo (Basque Country, Spain) signed an agreement to recover a highly degraded historical building, the Punta Begoña Galleries. The proposed methodologies have been developed based on the materials from this building and the degradation processes that are suffering

    Portable and Raman imaging usefulness to detect decaying on mortars from Punta Begoña Galleries (Getxo, North of Spain)

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    Punta Begoña Galleries were built in 1918 in Getxo (Basque Country, North of Spain) but were abandoned in 1960. Nowadays, their conservation state is very poor. In this work, portable Raman spectroscopy was applied to evaluate the original composition and possible deterioration products of the mortars used in the inner walls and those covering the concrete of the ceilings allowing us to select the most appropriate sampling points. In the laboratory, Raman microscopy and Raman imaging, assisted with scanning electron microscopy equipped with an energy dispersive spectrometer (SEM‐EDS), X‐ray diffraction and energy dispersive X‐ray fluorescence (ED‐XRF) imaging, allowed to identify the key compounds to understand the deterioration processes taking place in the mortars of the galleries. The main components of the mortars from the walls were calcite and gypsum. In some cases, alite (Ca3SiO5) and belite (Ca2SiO4) were identified; these components are characteristic of Portland cement clinker. The main components of the mortar covering the concrete were calcite, quartz, aragonite and gypsum. The aragonite identification confirmed the use of beach sand as the aggregate in the mortar. The concrete from the ceiling of the lower gallery is covered with three different mortar layers; the outermost layer is covered with a black crust. In the three mortars, the main components are similar to those used in the mortar covering the concrete from the upper gallery. Thanks to Raman, ED‐XRF and SEM‐EDS imaging, it was possible to map the distribution of the main components through the three mortar layers and also to identify the presence of dolomite {[CaMg(CO3)2]}, which was not possible to detect following single‐point micro‐Raman analyses.This work has been funded by the Ministry of Economy and Competitiveness and the European Regional Development Fund (ERDF) through the project DISILICA‐1930 (ref. BIA2014‐59124‐P) and by the cooperation agreement between the University of the Basque Country (UPV/EHU) and the City Council of Getxo (OTRI2014‐0639). C. GarcĂ­a‐Florentino is grateful to the University of the Basque Country (UPV/EHU), which funded her predoctoral fellowship. Technical support provided by Raman‐LASPEA Laboratory and General X‐ray Service of the SGIKer (UPV/EHU, Ministry of Economy and Competitiveness of Spain, Basque Government, ERDF and European Social Fund) is also gratefully acknowledged

    Cardiovascular fitness influences self-concept during the adolescence

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    Self-concept is one of the most researched constructs within the framework of educational psychology, psychology of the personality, and social psychology. Self-concept can be defined as the perception that an individual has of him or herself, with contents that are both descriptive, as well as evaluative 1. In the field of sport and exercise, physical selfconcept is also considered playing a considerable role in sports performance 2. The present study aims to investigate the relationship between sports practice, cardiovascular fitness and physical self-concept in adolescents.Ciencias de la Actividad FĂ­sica y del Deport

    In-Situ Analytical Study Of Bricks Exposed To Marine Environment Using Hand-Held X-Ray Fluorescence Spectrometry And Related Laboratory Techniques

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    In this work, the degradation processes that take place in bricks exposed to marine environments have been studied. Taking into account the importance of this building material where the silicates present in the final product act as stabilizer in the porous material itself, it is necessary to understand the decay processes that occur in these aggressive environments. As is known, the marine aerosol carries different types of salts, such as chlorides, sulfates, nitrates, etc., present in surrounding environment exerting a negative influence on the materials producing cracking and disintegration processes of the material and consequently loss of brick wall stability. Nowadays the development of portable devices is taking much more importance helping researchers to resolve problems in the field in a fast and easy way. In order to extract fast and satisfactory results about the conservation state of different bricks from Punta Begoña Galleries (Getxo, Basque Country, Spain), an in-situ analytical methodology was developed based on the use of hand-held Energy Dispersive X-ray fluorescence spectrometry (HH-ED-XRF) assisted with other laboratory techniques (ÎŒ-ED-XRF and X-Ray Diffraction) in order to corroborate and complement the information obtained in-situ. This construction undergoes the influence of marine aerosol, industrial port, power generation plants, and a fuel refinery among others. The pathologies visually observable in these bricks are disintegration, breakup and detachment of the bricks. The presence of deterioration compounds in the bricks has been studied according to the orientations of the bricks inside the construction

    Development of non-destructive analytical strategies based on Raman spectroscopy and complementary techniques for Mars Sample Return tested on Northwest Africa 1950 Martian meteorite

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    The Mars Sample Return (MSR) is a near future mission to return samples from the surface of Mars to the Earth. The field operations to carry out data collection, selection of the samples, and sampling procedure, mainly related to the CanMars MSR analog mission, are well-studied and published. In contrast, studies related to the methodology implemented to characterize the mineralogy of the returned samples are scarcer and focused on biosignature detection. This work presents a non-destructive analytical methodology based on Raman microscopy (single point and imaging), micro-energy dispersive X-ray fluorescence imaging analysis, and scanning electron microscopy coupled to energy dispersive spectroscopy that could be used as a first analytical characterization for the Martian samples that will be returned to the Earth in the upcoming MSR mission, before any destructive analysis. The analytical methodology has been tested on a fragment of the Northwest Africa 1950 Martian meteorite, which gives us a mineralogical characterization of the meteorite. This methodology also allowed to define several chemical reactions taking place in some of the mineral phases (olivines and ilmenite) of the meteorite. In addition to the geochemical characterization of the samples, the fact that this methodology allows to assess the chemical transformations in several minerals gives important clues for describing mineral processes and geological evolution that took place on Mars. This work also shows the advantages and disadvantages that each of the techniques employed has when performing a mineralogical characterization, the information that each one can provide and the importance of combining them.This work has been financially supported through the RamOnMars project: “Contribution of the Raman spectroscopy to the exploration of Mars and Martian Moons: ExoMars, Mars 2020, and MMX missions” (Grant ESP2017-87690-C3-1-R), funded by the Spanish Ministry of Science and Innovation (MICINN) and the European Regional Development Fund (FEDER) and by the Spanish Agency for Research (AEI-MINECO/FEDER) through the Project Science and Instrumentation for the Study of (bio)geochemical processes in Mars (Sigue-Mars), Grant no. RED2018-102600-T. C. García-Florentino is grateful to the Basque Government for her Postdoctoral Grant. J. Huidobro is grateful to the Basque Government for her Predoctoral contract. I. Torre-Fdez acknowledges his predoctoral contract from the University of the Basque Country (UPV/EHU). J. Aramendia is grateful to the European Union's Horizon 2020 research and innovation programme under the Marie SkƂodowska-Curie grant agreement No 754513 and The Aarhus University Research Foundation for her fellowship. The authors thank the General Service of Electron Microscopy and Materials Microanalysis Laboratory from the SGIker (UPV/EHU, MICINN, GV/EJ, ERDF and ESF) of the University of the Basque Country for their collaboration in the analyses

    Madrigales y clavicordios. Algunos problemas terminolĂłgicos en torno a la mĂșsica española del Siglo de Oro

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    Ce chapitre propose une rĂ©flexion autour de la transmission des termes musicaux « historiques » en espagnol Ă  travers deux cas d’étude : les mots madrigal et clavicorde. Cette analyse permettra d’étudier Ă  la fois leur usage courant ou singulier, ainsi que leur transmission et transformation au cours de l’histoire, depuis la pĂ©riode que l’on a l’habitude de nommer Renaissance jusqu’à nos jours, Ă©tant donnĂ© les difficultĂ©s que l’usage de ces mots comporte aujourd’hui

    Surface indicators are correlated with soil multifunctionality in global drylands

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    Multiple ecosystem functions need to be considered simultaneously to manage and protect the several ecosystem services that are essential to people and their environments. Despite this, cost effective, tangible, relatively simple and globally relevant methodologies to monitor in situ soil multifunctionality, that is, the provision of multiple ecosystem functions by soils, have not been tested at the global scale. We combined correlation analysis and structural equation modelling to explore whether we could find easily measured, field-based indicators of soil multifunctionality (measured using functions linked to the cycling and storage of soil carbon, nitrogen and phosphorus). To do this, we gathered soil data from 120 dryland ecosystems from five continents. Two soil surface attributes measured in situ (litter incorporation and surface aggregate stability) were the most strongly associated with soil multifunctionality, even after accounting for geographic location and other drivers such as climate, woody cover, soil pH and soil electric conductivity. The positive relationships between surface stability and litter incorporation on soil multifunctionality were greater beneath the canopy of perennial vegetation than in adjacent, open areas devoid of vascular plants. The positive associations between surface aggregate stability and soil functions increased with increasing mean annual temperature. Synthesis and applications. Our findings demonstrate that a reduced suite of easily measured in situ soil surface attributes can be used as potential indicators of soil multifunctionality in drylands world-wide. These attributes, which relate to plant litter (origin, incorporation, cover), and surface stability, are relatively cheap and easy to assess with minimal training, allowing operators to sample many sites across widely varying climatic areas and soil types. The correlations of these variables are comparable to the influence of climate or soil, and would allow cost-effective monitoring of soil multifunctionality under changing land-use and environmental conditions. This would provide important information for evaluating the ecological impacts of land degradation, desertification and climate change in drylands world-wide.Fil: Eldridge, David J.. University of New South Wales; AustraliaFil: Delgado Baquerizo, Manuel. Universidad Rey Juan Carlos; EspañaFil: Quero, JosĂ© L.. Universidad de CĂłrdoba; EspañaFil: Ochoa, Victoria. Universidad Rey Juan Carlos; España. Universidad de Alicante; EspañaFil: Gozalo, Beatriz. Universidad Rey Juan Carlos; España. Universidad de Alicante; EspañaFil: GarcĂ­a Palacios, Pablo. Universidad Rey Juan Carlos; EspañaFil: Escolar, Cristina. Universidad Rey Juan Carlos; EspañaFil: GarcĂ­a GĂłmez, Miguel. Universidad PolitĂ©cnica de Madrid; EspañaFil: Prina, AnĂ­bal. Universidad Nacional de La Pampa; ArgentinaFil: Bowker, Mathew A.. Northern Arizona University; Estados UnidosFil: Bran, Donaldo Eduardo. Instituto Nacional de TecnologĂ­a Agropecuaria. Centro Regional Patagonia Norte. EstaciĂłn Experimental Agropecuaria San Carlos de Bariloche; ArgentinaFil: Castro, Ignacio. Universidad Experimental SimĂłn RodrĂ­guez; VenezuelaFil: Cea, Alex. Universidad de La Serena; ChileFil: Derak, Mchich. No especifĂ­ca;Fil: Espinosa, Carlos I.. Universidad TĂ©cnica Particular de Loja; EcuadorFil: Florentino, Adriana. Universidad Central de Venezuela; VenezuelaFil: GaitĂĄn, Juan JosĂ©. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas; Argentina. Instituto Nacional de TecnologĂ­a Agropecuaria. Centro de InvestigaciĂłn de Recursos Naturales. Instituto de Suelos; Argentina. Universidad Nacional de LujĂĄn. Departamento de TecnologĂ­a; ArgentinaFil: Gatica, Mario Gabriel. Universidad Nacional de San Juan. Facultad de Ciencias Exactas FĂ­sicas y Naturales. Departamento de BiologĂ­a; Argentina. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas; Argentina. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Centro CientĂ­fico TecnolĂłgico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas FĂ­sicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; ArgentinaFil: GĂłmez GonzĂĄlez, Susana. Universidad de CĂĄdiz; EspañaFil: Ghiloufi, Wahida. UniversitĂ© de Sfax; TĂșnezFil: Gutierrez, Julio R.. Universidad de La Serena; ChileFil: Guzman, Elizabeth. Universidad TĂ©cnica Particular de Loja; EcuadorFil: HernĂĄndez, Rosa M.. Universidad Experimental SimĂłn RodrĂ­guez; VenezuelaFil: Hughes, Frederic M.. Universidade Estadual de Feira de Santana; BrasilFil: Muiño, Walter. Universidad Nacional de La Pampa; ArgentinaFil: Monerris, Jorge. No especifĂ­ca;Fil: Ospina, Abelardo. Universidad Central de Venezuela; VenezuelaFil: RamĂ­rez, David A.. International Potato Centre; PerĂșFil: Ribas Fernandez, Yanina Antonia. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Centro CientĂ­fico TecnolĂłgico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas FĂ­sicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; ArgentinaFil: RomĂŁo, Roberto L.. Universidade Estadual de Feira de Santana; BrasilFil: Torres DĂ­az, Cristian. Universidad del Bio Bio; ChileFil: Koen, Terrance B.. No especifĂ­ca;Fil: Maestre, Fernando T.. Universidad Rey Juan Carlos; España. Universidad de Alicante; Españ

    Surface indicators are correlated with soil multifunctionality in global drylands

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    1. Multiple ecosystem functions need to be considered simultaneously to manage and protect the several ecosystem services that are essential to people and their environments. Despite this, cost effective, tangible, relatively simple and globally relevant methodologies to monitor in situ soil multifunctionality, that is, the provision of multiple ecosystem functions by soils, have not been tested at the global scale. 2. We combined correlation analysis and structural equation modelling to explore whether we could find easily measured, field‐based indicators of soil multifunctionality (measured using functions linked to the cycling and storage of soil carbon, nitrogen and phosphorus). To do this, we gathered soil data from 120 dryland ecosystems from five continents. 3. Two soil surface attributes measured in situ (litter incorporation and surface aggregate stability) were the most strongly associated with soil multifunctionality, even after accounting for geographic location and other drivers such as climate, woody cover, soil pH and soil electric conductivity. The positive relationships between surface stability and litter incorporation on soil multifunctionality were greater beneath the canopy of perennial vegetation than in adjacent, open areas devoid of vascular plants. The positive associations between surface aggregate stability and soil functions increased with increasing mean annual temperature. 4. Synthesis and applications. Our findings demonstrate that a reduced suite of easily measured in situ soil surface attributes can be used as potential indicators of soil multifunctionality in drylands world‐wide. These attributes, which relate to plant litter (origin, incorporation, cover), and surface stability, are relatively cheap and easy to assess with minimal training, allowing operators to sample many sites across widely varying climatic areas and soil types. The correlations of these variables are comparable to the influence of climate or soil, and would allow cost‐effective monitoring of soil multifunctionality under changing land‐use and environmental conditions. This would provide important information for evaluating the ecological impacts of land degradation, desertification and climate change in drylands world‐wide.This work was funded by the European Research Council ERC Grant agreement 242658 (BIOCOM). CYTED funded networking activities (EPES, Acción 407AC0323). D.J.E. acknowledges support from the Australian Research Council (DP150104199) and F.T.M. support from the European Research Council (BIODESERT project, ERC Grant agreement no 647038), from the Spanish Ministerio de Economía y Competitividad (BIOMOD project, ref. CGL2013-44661-R) and from a Humboldt Research Award from the Alexander von Humboldt Foundation. M.D.-B. was supported by REA grant agreement no 702057 from the Marie Sklodowska-Curie Actions of the Horizon 2020 Framework Programme H2020-MSCA-IF-2016), J.R.G. acknowledges support from CONICYT/FONDECYT no 1160026
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