160 research outputs found

    Propuesta comunicativa apliada en los cuartos cursos de la Unidad Educativa Corazón de María, para fortalecer la identidad y cultura, con el fin de revitalizar los juegos tradicionales de la fiesta popular de Tumbaco

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    Por las nuevas tendencias globalizantes de la ultima década que se han ido insertando en los procesos sociales, económicos y políticos de la sociedad provocando cambios drásticos en las costumbres y tradiciones de los seres humanos, esto se refleja principalmente en la Fiesta Popular de Tumbaco en donde se incrementan actividades que no corresponden la Identidad y Cultura de los Tumbaquenos. Por esta razón, los habitantes de esta parroquia, ya no ven a esta festividad como algo identitario y de sentido más bien lo toman como una forma de entretenimiento y de diversión. Además, existe un proceso en donde los habitantes de la población se van desvinculando de sus raíces, expresiones y manifestaciones culturales adoptando estas nuevas tendencias como parte de su memoria histórica. Por eso se hace necesario fortalecer la Identidad Tumbaquena mediante procesos de comunicación que se realicen con la Institución Educativa y parte de la población de Tumbaco. Esta investigación se encuentra ubicada dentro de varias categorías esenciales que forman pilares fundamentales para el desarrollo de la propuesta de comunicación que se plantea en esta tesis. Es por eso que la Cultura se encuentra enmarcada dentro de esta investigación. A lo largo de la historia se ha ido realizando investigación acerca de la conceptualizacion de cultura, pero ahora en la actualidad existen diversas acepciones de este concepto que han ido modificando en los diferentes periodos de la sociedad. Por lo que hoy se piensa a la Cultura como el conjunto total de los actos humanos en una comunidad dada, ya sean estas prácticas económicas, artísticas, científicas

    Energy consumption in university commuting: Barriers, policies and reduction scenarios in León (Spain)

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    .There is a growing interest in university commuting that aims at identifying patterns of behavior, as well as the main barriers limiting the advances in sustainable mobility on campus. This work analyzes, on the basis of an online survey conducted at the University of Leon (ULE), the following issues: a) the behavior of ULE users in their weekly commuting; b) the environmental implications of such behavior in terms of non-renewable cumulative energy demand (NR CED), and c) the main barriers/disincentives to implementing a modal shift as declared by the respondents, according to their work status (students or workers) and gender. The data reveal differences in habits, especially in relation to the users’ work status, while differences by gender are not so significant. Still, this case study shows how men students use bicycles and motorcycles slightly more often than women, while the car is the main transportation mode for women workers. Car use is in fact the main hotspot of university commuting to the ULE (approximately 95% of the NR CED). Unsafe cycle paths, thefts at university, bus fares and frequency of service were the main barriers to a greater use of bicycle and bus identified by the survey respondents, with some differences by gender and work status. Measures aimed at minimizing these barriers could achieve maximum reductions of the NR CED ranging between 18.1% and 35.0%. This article discusses measures and policies that could be implemented to improve sustainable mobility at university.S

    Citrate and Polyvinylpyrrolidone Stabilized Silver Nanoparticles as Selective Colorimetric Sensor for Aluminum (III) Ions in Real Water Samples

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    The use of silver nanoparticles stabilized with citrate and polyvinylpyrrolidone as a sensor for aluminum ions determination is proposed in this paper. These non-functionalized and specific nanoparticles provide a highly selective and sensitive detection system for aluminum in acidic solutions. The synthesized nanoparticles were characterized by transmission electron microscopy. Surface plasmon band deconvolution analysis was applied to study the interaction between silver nanoparticles and aluminum ions in solution. The interaction band in the UV-visible region was used as an analytical signal for quantitation purposes. The proposed detection system offers an effective AND wide linearity range (0.1-103 nM), specificity for Al(III) in THE presence of other metallic ions in solution, as well as high sensitivity (limit of detection = 40.5 nM). The proposed silver-nanoparticles-based sensor WAS successfully used for detecting Al(III) in real water samples.Spanish Ministerio de Economía y Competitividad, MinECo, CTQ2016-78703-P (AEI/FEDER, UE)España, Universidad de Sevilla ,V Plan Propio Grupos Emergentes (PP2016-5937)Junta de Andalucía (2017/FQM-386)CITIUS VI PP USO SSGG (1804031606

    Adolescent perception of maternal practices in Portugal and Spain: similarities and differences

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    The aim of this study was to compare parenting in two southern European countries, Spain and Portugal, according to adolescent perceptions from a situated perspective. A total of 445 Portuguese (58.88%) and Spanish (41.12%) adolescents completed a questionnaire about maternal practices and provided socio-demographic information. Portuguese and Spanish mothers were more responsive than coercive in controlling adolescents’ compliance and non-compliance situations. Spanish mothers scolded, revoked privileges, and punished physically more often than Portuguese mothers, who used dialogue more often. Multivariate analysis showed three groups of parenting practices. Portuguese mothers were represented mainly in the Indulgent group (81.70%), and Spanish mothers in the Authoritative group (74.40%), whereas the third group (Neglectful) was independent of the country of origin. These results support the theory that research and family intervention should recognize cultural aspects in order to grasp the parenting process.FCT: UID/PSI/04345/2020info:eu-repo/semantics/publishedVersio

    Green electromembrane extraction procedure based on biodegradable chitosan films for determination of polyphenolic compounds in food samples: greenness assessment of the sample preparation approach

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    A simple, rapid and environmentally friendly method for the electromembrane extraction of polyphenolic compounds has been developed using chitosan films (60% (w/w) chitosan, 40% (w/w)-Aliquat®336, 10–11 μm thickness) as biopolymeric membrane. In this work for the first time with this type of chitosan-based support, the use of organic solvents has been completely eliminated, which allows considering the proposed methodology as a green solvent-free procedure, as demonstrated by performing analytical greenness metric for sample preparation (AGREEprep). Under optimal experimental conditions (10 mL donor phase, pH 7; 50 μL acceptor phase, pH 9; 100 V applied voltage for 15 min) high enrichment factors (EF ≥ 60) were obtained for all the target analytes. Wide concentration ranges between 52.8 μg L− 1 and 1000 μg L− 1 , good linearity (R2 ≥ 0.996), low limit of detection (15.9–37.1 μg L− 1 ), and repeatability (relative standard deviation (RSD) values 4–10%) were achieved. Polyphenolic compounds have been successfully extracted from coffee- and tea-based dietary food supplements in different formats (pills and ampoules). For comparison purposes, target analytes have additionally been determined in green coffee beans and tea.Ministerio de Ciencia e Innovación de España (MCIN) - PGC 2018- 096608-B-C2

    A systematic review of the biomarkers associated with cognition and mood state in bipolar disorder

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    Background Bipolar disorder (BD) is a severe psychiatric disorder characterized by changes in mood that alternate between (hypo) mania or depression and mixed states, often associated with functional impairment and cognitive dysfunction. But little is known about biomarkers that contribute to the development and sustainment of cognitive defcits. The aim of this study was to review the association between neurocognition and biomarkers across diferent mood states. Method Search databases were Web of Science, Scopus and PubMed. A systematic review was carried out fol‑ lowing the PRISMA guidelines. Risk of bias was assessed with the Newcastle–Ottawa Scale. Studies were selected that focused on the correlation between neuroimaging, physiological, genetic or peripheral biomarkers and cog‑ nition in at least two phases of BD: depression, (hypo)mania, euthymia or mixed. PROSPERO Registration No.: CRD42023410782. Results A total of 1824 references were screened, identifying 1023 published articles, of which 336 were considered eligible. Only 16 provided information on the association between biomarkers and cognition in the diferent afective states of BD. The included studies found: (i) Diferences in levels of total cholesterol and C reactive protein depending on mood state; (ii) There is no association found between cognition and peripheral biomarkers; (iii) Neuroimaging biomarkers highlighted hypoactivation of frontal areas as distinctive of acute state of BD; (iv) A deactivation failure has been reported in the ventromedial prefrontal cortex (vmPFC), potentially serving as a trait marker of BD. Conclusion Only a few recent articles have investigated biomarker-cognition associations in BD mood phases. Our fndings underline that there appear to be central regions involved in BD that are observed in all mood states. However, there appear to be underlying mechanisms of cognitive dysfunction that may vary across diferent mood states in BD. This review highlights the importance of standardizing the data and the assessment of cognition, as well as the need for biomarkers to help prevent acute symptomatic phases of the disease, and the associated functional and cognitive impairment

    Chitosan tailor-made membranes as biopolymeric support for electromembrane extraction

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    El período de embargo ha expirado ya al ser del año 2019A chitosan membrane composed by 60% (w/w) chitosan and 40% (w/w) Aliquat®336 has been proposed as a new biopolymeric support for electromembrane extraction. The new support has been characterized by Scanning Electron Microscopy, resulting a 30–35 µm thickness. Amoxicillin, nicotinic acid, hippuric acid, salicylic acid, anthranilic acid, ketoprofen, naproxen and ibuprofen have been successfully extracted using the proposed support. Better enrichment factors were obtained for the acidic polar analytes than for the non-steroidal anti-inflammatory compounds (ranging from 118 for hippuric acid and 20 for ibuprofen). Electromembrane extraction was developed applying a DC voltage of 100 V, 1-octanol as supported liquid membrane and 20 min of extraction. The target analytes have also been satisfactorily extracted from human urine samples, providing high extraction efficiencies. The chitosan membrane is presented as a promising alternative for supporting liquid membrane compared to commonly used materials for this purpose.Ministerio de Educación y Ciencia (MEC). España CTM2015–67902-C-1-

    Annual evolution of the number of hotel squares offered in the city of Seville. An empirical analysis with support econometric

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    Con el correspondiente “pico” en 1992, por razones obvias, y unproceso suavemente creciente en la última década,se analiza la evolución histórica del número de plazas hoteleras ofertadas por la ciudad de Sevilla en hoteles de tres, cuatro y cinco estrellas, en el periodo comprendido entre 1988 y 2011. En primer lugar, los análisis gráficos son bastante elocuentes de la evolución delas series y del cambio estructural que se produce en 1992. Modelos de regresión, tanto en escala de nivel como logarítmica, corrigiendo el efecto de la autocorrelación,propio de datos longitudinales, con estimaciones de tipo Prais-Winsten o Cochrane-Orcutt, son empleados para medir el grado de influencia de algunas magnitudes macroeconómicas de nuestro país o de los países del entorno que más visitantes proporcionan a la ciudad, sobre esa evolución temporal. También, modelos autorregresivos de orden 1 y modelos con tendencia definida describen bastante bien el fenómeno estudiado

    Mechanical thrombectomy with 'ADAPT' technique by transcervical access in acute ischemic stroke

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    The mechanical thrombectomy (MT) for endovascular clot retrieval has dramatically improved successful revascularization and clinical outcome in selected acute stroke patients. MT is typically performed via a transfemoral approach, but catheterization of the occluded vessel can be problematic in cases of extensive vessel tortuosity. We describe a case of MT with the 'ADAPT' technique by direct carotid access due to an inability to catheterize the ICA by a transfemoral approach for acute cerebral ischemia in the setting of left MCA occlusion. Excellent angiographic and good clinical results were obtained without any complications. An 80-year-old woman was admitted with a stroke by occlusion of the left MCA, with an NIHSS: 11, and an ASPECT: 7 in the CT. Under sedation a transfemoral angiography was performed, but after multiple attempts, it was impossible to make a stable catheterization of the left CCA. A transcervical approach was pursued. With ultrasound guidance the CCA was catheterized. Using the 'ADAPT' technique, we performed a successful MT. Post-procedure angiography (at 14 minutes) demonstrated recanalization of the entire left MCA (TICI: 3), without complications. The carotid access point was closed with a percutaneous closure. Control TC at 24 h showed a slight hypodensity in the left lenticular nucleus, and loss of gray-white matter differentiation in the adjacent cortex. Neurologically, the patient presented with progressive improvement. At discharge, she had an NIHSS: 0, mRS: 0 and Barthel: 100. MT by direct carotid access is an effective alternative technique in those cases where it is not accessible by a transfemoral approach

    Chitosan biofilms: Insights for the selective electromembrane extraction of fluoroquinolones from biological samples

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    A selective electromembrane extraction procedure for the extraction of Enrofloxacin, Marbofloxacin and Flumequine, usually employed as antibiotic in veterinarian use, is proposed by using a chitosan biofilm, composed by 60% (w/w) chitosan and 40% (w/w) Aliquat®336, as active biopolymeric support. The interaction mechanism occurring between the target drugs and the biopolymer has been deeply studied using the Quantum Theory of Atoms in Molecules. The obtained results show the interaction between the extracted fluoroquinolones and the biomembrane is stabilized by two hydrogen bonds formed between both the carboxyl and keto groups of the drugs with both the amine and hydroxyl groups of glucosamine in the biopolymer. The energetic results agree with the high extraction efficiency obtained for Marbofloxacin, Enrofloxacin and Flumequine in terms of enrichment factors (83, 82 and 58, respectively) in presence of other fluoroquinolones. Under optimum conditions, the proposed electromembrane extraction method exhibits wide linear ranges of 4.2e200 mg L1 , 5.6e200 mg L1 and 5.1e200 mg L1 , respectively; low limits of detection close to 1.3 mg L1 and appropriate repeatability (relative standard deviation values 4e7%).Fondos Europeos FEDER, Ministerio de Ciencia e Innovación y Agencia Estatal de Investigación, de España - PGC2018-096608- B-C22Ministerio de Ciencia, Innovación y Universidades de España - RED2018-102522-TJunta de Andalucía - 2019/FQM-106Premio Mensual Publicación Científica Destacada de la US. Facultad de Químic
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