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El comercio tardoantiguo (ss. IV-VI) en el noroeste peninsular a través del registro cerámico de la Ría de Vigo
No full textThis work investigates a large assemblage of potentially late-dated Roman ceramics excavated in the early 1990s during rescue interventions in Vigo (N/E Spain) and its surroundings. It is well established that much of this material originated from the Mediterranean, especially the eastern provinces of the Empire. Based on the analyses of these investigations, this study goes on to assess the extent of the Atlantic distribution route and link the northwest of the Iberian Peninsula well within the trading dynamics of the Mediterranean world
Emilia Pardo Bazán, the First Theoretician and Critic of Rexurdimento
Get PDFEspecialmente durante la década 1880-1890, Emilia Pardo Bazán llevó a cabo una intensa actividad teórica y crítica, tanto en el caso español como en el de la emergente literatura en lengua gallega. Fue la primera en abordar teóricamente la idea de renacimiento aplicada a la realidad gallega de aquellos años y también la primera en hacer un análisis crítico de los autores más relevantes de ese período: Rosalía de Castro, Manuel Curros Enríquez, Eduardo Pondal y Valentín Lamas Carvajal. Ella fue en gran parte responsable de la introducción del paradigma de Michelet, con el que hizo comparatismo entre el renacimiento gallego y la “renaixença” catalana. Desgranó las grandes obras y autores de este período y el impacto de sus críticas fue muy considerable, tanto a efectos de marcar direcciones interpretativas en las historias literarias posteriores, como por crear importantes polémicas e incluso provocar respuestas críticas en formato literario como O divino sainete. Este tipo de intervenciones de nuestra autora hay que situarlas en el contexto de las disputas donde se mezcla lo literario con lo ideológico y en definitiva en el de la lucha abierta por el incipiente capital simbólico.Especially during the 1880-1890 decade, Emilia Pardo Bazán carried out an intense theoretical and critical activity, both in Spanish literature and in the emerging literature in Galician language. She was the first author to theoretically address the idea of renaissance applied to the Galician reality of those years and also the first one to make a critical analysis of the most relevant authors of that period: Rosalía de Castro, Manuel Curros Enríquez, Eduardo Pondal and Valentín Lamas Carvajal. She was largely responsible for the introduction of Michelet’s paradigm, with which she made comparisons between the Galician “renaissance” called “Rexurdimento” and the Catalan “renaixença”. She studied the great works and authors of this period and the impact of his critiques was very considerable, both for the purpose of setting interpretive directions in later literary histories, and for creating important controversy and even provoking critical responses in literary format such as O divino sainete. This type of intervention by our author needs to be placed in the context of disputes where the literary is mixed with the ideological and ultimately in the open struggle for the incipient symbolic capital.Especialmente durante a década 1880-1890, Emilia Pardo Bazán levou adiante unha intensa actividade teórica e crítica, tanto no caso español, como no da emerxente literatura en lingua galega. Ela foi a primeira en tratar teoricamente a idea de renacemento aplicada á realidade galega daqueles anos e tamén a primeira en facer unha análise crítica certamente extensa dos autores máis relevantes daquel período: Rosalía de Castro, Manuel Curros Enríquez, Eduardo Pondal e Valentín Lamas Carvajal. Ela foi a responsable en boa medida da introdución do paradigma de Michelet, co que fixo comparatismo entre o “renacimiento” galego e a “renaixença” catalá. Debullou as grandes obras e autores deste período e o impacto das súas críticas foi moi considerable, tanto a efectos de marcar rumbos interpretativos nas historias da literatura posteriores, como á hora de crear importantes polémicas e mesmo orixinar contestacións críticas en formato literario coma O divino sainete. Este tipo de intervención da nosa autora cómpre situalo no contexto das disputas onde o literario se mestura co ideolóxico e en definitiva no da loita aberta polo incipiente capital simbólico
Biosuccinic acid production from potato peel waste by fermentative strategies. Process enhancement
Get PDFFood waste valorization is a critical strategy to accomplish environmental objectives and achieve the United Nations Sustainable Development Goals. This study focuses on the employment of potato peel waste (PPW), an abundant and renewable byproduct from the potato processing industry, as feedstock for the fermentative production of succinic acid (SA), a versatile bio-based platform chemical. Two fermentation strategies - Sequential Hydrolysis and Fermentation (SHF) and Pre-Saccharification and Simultaneous Saccharification and Fermentation (PSSF) – were implemented employing the bacteria Actinobacillus succinogenes. Key parameters, including liquid-to-solid ratio (LSR), nutrient supplementation, and magnesium carbonate levels, were evaluated in flask experiments. Optimal results were obtained with PSSF methodology at an LSR of 10 g/g without nutrient supplementation, achieving a SA yield of 0.94 g SA/g glucose consumed, with a concentration of 45.91 g/L and a productivity of 0.65 g/L h. The scalability of the process was confirmed in a bioreactor, reaching SA concentrations, yields and productivities of 42.51 ± 1.81 g/L, 0.89 g SA/g glucose consumed and 0.89 g/L h, respectively. Notably, operating at a pH of 6.8 without the addition of magnesium carbonate, simplified the process and reduced costs without compromising productivity. These findings underscore the potential of PPW as a sustainable feedstock for SA production, aligning with circular economy initiatives by transforming agricultural waste into high-value chemicals. This approach supports the development of competitive and environmentally friendly biorefineries.Agencia Estatal de Investigación | Ref. CNS2022-136095Xunta de Galicia | Ref. GRC ED431C 2021/46-GRCXunta de Galicia | Ref. ED431F 2020/03Agencia Estatal de Investigación | Ref. PID2020-116717RB-I00Agencia Estatal de Investigación | Ref. RYC2018-026177-
O impacto do exercício na postura da coluna vertebral em adolescentes: uma revisão sistemática
Get PDFObjective: The objective of this study was to analyze research evaluating the impact of various physical exercise programs on improving spinal posture in adolescents. Methods: A systematic review covering the last six years (2018–2024) was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines across nine databases. Methodological quality was assessed using the Physiotherapy Evidence Database (PEDro) scale. Results: A total of 152 studies were identified, of which ten met the selection criteria and demonstrated high methodological quality and were included in the review. These studies showed a reduction in the thoracic and lumbar kyphosis angles, lumbar lordosis, and the percentage of pain, as well as an increase in trunk mobility and inclination angle following the implementation of physical exercise programs. Conclusions: In intervention groups physical exercise has an impact on posture, leading to significant improvements in thoracic and lumbar kyphosis angles compared to control groups.Objetivo: O objetivo deste estudo foi analisar pesquisas que avaliaram o impacto de diferentes programas de exercício físico na melhoria da postura da coluna vertebral em adolescentes. Métodos: Foi realizada uma revisão sistemática dos últimos seis anos (2018–2024), de acordo com as diretrizes Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA), em nove bases de dados. A qualidade metodológica foi avaliada por meio da escala Physiotherapy Evidence Database (PEDro). Resultados: Foram identificados 152 estudos, dos quais dez foram incluídos na revisão por cumprirem os critérios de seleção, apresentando elevada qualidade metodológica. Esses estudos demonstraram diminuição do ângulo de cifose torácica e lombar, da lordose lombar e da percentagem de dor, bem como aumento da mobilidade do tronco e do ângulo de inclinação após a implementação dos programas de exercício físico. Conclusões: Nos grupos de intervenção, o exercício físico tem impacto na postura, levando a melhorias significativas nos ângulos da cifose torácica e lombar em comparação com os grupos de control
Towards an integrative understanding of soil biodiversity
Get PDFSoil is one of the most biodiverse terrestrial habitats. Yet, we lack an integrative conceptual framework for understanding the patterns and mechanisms driving soil biodiversity. One of the underlying reasons for our poor understanding of soil biodiversity patterns relates to whether key biodiversity theories (historically developed for aboveground and aquatic organisms) are applicable to patterns of soil biodiversity. Here, we present a systematic literature review to investigate whether and how key biodiversity theories (species–energy relationship, theory of island biogeography, metacommunity theory, niche theory and neutral theory) can explain observed patterns of soil biodiversity. We then discuss two spatial compartments nested within soil at which biodiversity theories can be applied to acknowledge the scale‐dependent nature of soil biodiversity.European Research Council | Ref. 677232Deutsche Forschungsgemeinschaft | Ref. TH 2307/1‐1Natural Sciences and Engineering Research Council of Canada | Ref. RGPIN-2019-05758European Research Council | Ref. ERC-ADV 694368European Research Council | Ref. ERC-ADV 32302
Fugas e interferencias: VI International Performance Art Conference: 2021
No full textRecoge los contenidos presentados a: International Performance Art Conference (6. 2021. Pontevedra)Estas actas de Fugas e Interferencias. VI
International Performance Art Conference
2021 presentan la recopilación
de artículos procedentes de las ponencias
seleccionadas por nuestro Comité Científico.
Estas ponencias han sido llevadas a cabo en
la sexta edición del congreso que tuvo lugar los
días 30 de septiembre 1 y 2 de octubre de 2021
en la Casa de Campás de Pontevedra y el Centro
Galego de Arte Contemporánea (CGAC) de
Santiago de Compostela. Junto a estas ponencias,
las actas también incluyen los artículos de
las dos conferencias plenarias pronunciadas por
Maite Garbayo Maeztu Desapariciones y encarnaciones:
la performance como dispositivo para
hacer aparecer y Jaime Vallaure 44 Puntos final
Tailoring chiral gold nanorods via single‐step seed‐to‐Au(III) ratio and unlocking their potential in refractive index sensing
Get PDFColloidal chiral plasmonic nanoparticles are garnering growing interest due to their interaction with circularly polarized light, offering advanced optical applications. Their circular dichroism (CD) spectra are significantly narrower and more defined than extinction spectra, making them ideal for refractive index‐based sensing. Despite progress in colloidal synthesis, this field remains relatively underexplored. In this work, a one‐step, seed‐mediated route to chiral Au nanorods is introduced in which the molar ratio Au 3 ⁺/Au⁰ enables continuous control of the CD response (intensity, sign, and position), using L‐ and D‐cysteine as chiral inducers. CD‐based refractive index sensitivity (RIS) measurements reveal a figure of merit (FoM = RIS/linewidth) exceeding 1000 RIU −1 , outperforming the conventional extinction‐based approaches. Thin films of C‐AuNRs fabricated via a layer‐by‐layer assembly retain the bisignate CD response and show RIS values comparable to colloidal samples. These films demonstrate excellent stability, reusability, and resilience in highly absorbing media. All the experimental data are supported by advanced calculations performed using full‐wave M3 Maxwell's solver and using electron tomography reconstructions as direct input. Finally, their applicability in RI‐based quantitative detection of bovine serum albumin (BSA) is demonstrated, highlighting their potential for biomolecular sensing.Agencia Estatal de Investigación | Ref. TED2021-131628A-I00Agencia Estatal de Investigación | Ref. CNS2022-135531Agencia Estatal de Investigación | Ref. PID2022-138724NB-I00Agencia Estatal de Investigación | Ref. PID2023-147567NB-I00Xunta de Galicia | Ref. GPC ED431B 2025/42Xunta de Galicia | Ref. GRCED431C2020/09Universidade de Vigo/CISU
Craniocervical characteristics of wind musicians: an observational study in Spanish conservatory students
No full textINTRODUCTION: Playing wind instruments may promote neck, arm, or shoulder pain, as well as temporomandibular pain. The cervical and orofacial regions are associated, due to their proximity and the influence they both have on body posture. In wind musicians, the mouth is responsible
for producing the sound. Any alteration in the characteristics of the orofacial system can affect the embouchure when playing a wind instrument. AIM: To observe demographic and physical characteristics in the cervicomandibular region in a sample of university wind students. METHODS: An observational
descriptive cross-sectional study was carried out with wind students in the two higher conservatories of the region of Galicia, Spain. We studied the posture of the head and neck, the range of cervical movement and mouth opening, the presence of trigger points in the upper trapezius and masseter,
as well as their algometry and electromyographic value. RESULTS: 30 woodwind and 19 brass students were evaluated, 51% of whom were female. A tendency towards a forward position of the head and protraction of the shoulders was observed, maintaining horizontality in the frontal plane in both
the head and shoulders. Cervical movements were diminished, while the mouth opening was greater than standard. In this sample, a relatively high prevalence of trigger points in the upper trapezius was observed, while the masseters showed greater sensitivity to pain and greater activation during
trapezius contraction. CONCLUSIONS: Musicians in this study presented an anteriorized position of the head and shoulders in the sagittal plane, with a decrease in cervical range of motion particularly in the transverse plane
Copper nanoparticles obtained by laser ablation in liquids as bactericidal agent for dental applications
No full textThe dramatic increase of antibiotic-resistant bacteria is considered one of the greatest threats to human health at global scale. The antibacterial activity of noble metal nanoparticles, could be the solution against bacterial infectious diseases which currently do not respond to conventional treatments. In this work, copper nanoparticles were produced by laser ablation using two different lasers. A nanosecond laser operating at 532 nm and a picosecond laser at 1064 nm were used to ablate a copper target submerged in water and methyl alcohol. The obtained colloidal solutions consisted of copper oxide nanoparticles in suspension with diameters ranging from few nanometers to 45 nm. The nanoparticles formation process is highly influenced by laser parameters, but the solvent plays a crucial role on their characteristics. Cu oxide nanoparticles obtained in water present chain-like nanostructure, while those obtained in methyl alcohol are spherical with lower presence of oxide. All the obtained nanoparticles are crystalline and noticeably stable. Microbiology tests confirm their strong activity against Aggregatibacter actinomycetemcomitans. Cytocompatibility with human periodontal ligament stem cells is also confirmed. The biological assays evidence that ions release is not the main parameter responsible for the bactericidal activity of copper nanoparticles. Other factors such as oxidation state, size and crystallographic structure, have a greater influence on the process.EU research project Bluehuman | Ref. EAPA_151/2016Agencia Estatal de Investigación | Ref. RTI2018-095490-J-I00Xunta de Galicia | Ref. ED431B 2016/042Xunta de Galicia | Ref. ED481D 2017/010Xunta de Galicia | Ref. Ref. ED481B 2016/047-0Universidad de Chil
Comparison of three-dimensional flow mixing via pulsation and dynamical stirring: application to the mixing of parallel streams at different temperatures
No full textPurpose
This paper aims to compare the performance of flow pulsation versus flow stirring in the context of mixing of a passive scalar at moderate Reynolds numbers in confined flows. This comparison has been undertaken in two limits: diffusion can be neglected as compared to convection (very large Peclet) and diffusion and convection effects are comparable. The comparison was performed both in terms of global parameters: pumping power and mixing efficiency and local flow topology.
Design/methodology/approach
The study has been addressed by setting up a common conceptual three-dimensional problem that consisted of the mixing of two parallel streams in a square section channel past a square section prism. Stirring and pulsation frequencies and amplitudes were changed and combined at an inlet Reynolds number of 200. The numerical model was solved using a finite volume formulation by adapting a series of open-source OpenFOAM computational fluid dynamic (CFD) libraries. For cases with flow pulsation, the icoFoam solver for laminar incompressible transient flows was used. For cases with stirring, the icoDyMFoam solver, which uses the arbitrary Lagrangian–Eulerian method for the description of the moving dynamical mesh, was used to model the prism motion. At the local flow topology level, a new method was proposed to analyze mixing. Time evolution of folding and wrinkling of sheets made up of virtual particles that travel along streak lines was quantified by generating lower rank projections of the sheets onto the spaces spanned by the main eigenvectors of an appropriate space-temporal data decomposition.
Findings
In the limit when convection is dominant, the results showed the superior performance of stirring versus flow pulsation both in terms of mixing and required pumping power. In the cases with finite Peclet, the mixing parameters by stirring and flow pulsation were comparable, but pulsation required larger pumping power than stirring. For some precise synchronization of stirring and pulsation, the mixing parameter reached its maximum, although at the expense of higher pumping power. At the local flow topology level, the new method proposed to quantify mixing has been found to correlate well with the global mixing parameter.
Originality/value
A new systematic comparative study of two methods, stirring and pulsation, to achieve mixing of passive scalars in the mini scale for confined flows has been presented. The main value, apart from the conclusions, is that both methods have been tested against the same flow configuration, which allows for a self-consistent comparison. Of particular interest is the fact that it has been found that accurate synchronization of both methods yields mixing parameters higher than those associated to both methods taken separately. This suggests that it is possible to synchronize mixing methods of a different nature to achieve optimum designs. The new theoretical method that has been proposed to understand the mixing performance at the local level has shown promising results, and it is the intention of the authors to test its validity in a broader range of flow parameters. All these findings could be taken as potential guidelines for the design of mixing processes in the mini scale in the process industry.Agencia Estatal de Investigación | Ref. PID2019-109619GB-C21