135 research outputs found
Morpho-physiological plant quality when biochar and vermicompost are used as growing media replacement in urban horticulture
Peat moss is the most used soilless substrate in the production of container plants in floriculture. Nevertheless, the drainage of peat bogs due to the peat extraction has increased the necessity of seeking products that could replace the peat that is used in plant production. Therefore, a comparative study was conducted to evaluate the effect of a biochar (B) - vermicompost (V) mixture, as a partial substitute for peat-based substrates, on the morpho-physiological characteristics of ornamental plants. Different blends containing B and V were compared to a baseline peat-based substrate (S) as control in the cultivation of two ornamental bedding plant species that are widely used in urban areas: geranium (Pelargonium peltatum) and petunia (Petunia hybrida). Plant growth and physiological parameters were assessed. Results showed that it is possible to grow container plants of these two species with commercial quality, using a peat-based substrate mixed with biochar and/or vermicompost (up to 30% V and 12% B). Plants in these substrates showed a similar or enhanced physiological response to those grown in the control using commercial peat-based substrate.This work was partially supported by the projects CTQ2013-46804-C2-1-R and CGL2016-76498-R of the Spanish Ministry of Economy and Competitiveness and the European Regional Development Funds (ERDF). The authors wish to thank the Horticultural Department and Carbon Sequestration and Management Center of Ohio State University for providing materials and facilities for this investigation. Similarly, the authors are deeply grateful to the following people: Mrs. Loewe and Dr. J. Altland from Application Technology Research Unit at Wooster OSU campus for their laboratory assistance in determining the physical properties substrate mixtures. Miss S. Stieve and Dr P. Jourdan from the Ornamental Germoplam Center at Columbus OSU campus are also thanked for their laboratory assistance in the accurate and precise weighing of leaves
Innovación pedagógica en toxicología: simulación situada, impacto en el aprendizaje
La propuesta de este trabajo busca implementar modelos de “enseñanza con simulaciones escénicas”, en la cual se logre acercar a los alumnos a situaciones y elementos artificiales, pero lo más similares posible a los de la realidad (Joyce y Weil, 2002), a fin de desarrollar en ellos habilidades prácticas útiles para su vida profesional.Eje 1: Innovación y exploración en cambios de modalidades en cursadasFacultad de Ciencias Exacta
Exploring the Different Degrees of Magnetic Disorder in TbxR1−xCu2 Nanoparticle Alloys
Recently, potential technological interest has been revealed for the production of magnetocaloric alloys using Rare-Earth intermetallics. In this work, three series of TbxR1−xCu2 (R ≡ Gd, La, Y) alloys have been produced in bulk and nanoparticle sizes via arc melting and high energy ball milling. Rietveld refinements of the X-ray and Neutron diffraction patterns indicate that the crystalline structure in all alloys is consistent with TbCu2 orthorhombic Imma bulk crystalline structure. The analyses of the DC-magnetisation (MDC) and AC-susceptibility (χAC) show that three distinct degrees of disorder have been achieved by the combination of both the Tb3+ replacement (dilution) and the nanoscaling. These disordered states are characterised by transitions which are evident to MDC, χAC and specific heat. There exists an evolution from the most ordered Superantiferromagnetic arrangement of the Tb0.5La0.5Cu2 NPs with Néel temperature, TN∼ 27 K, and freezing temperature, Tf∼ 7 K, to the less ordered weakly interacting Superparamagnetism of the Tb0.1Y0.9Cu2 nanoparticles (TN absent, and TB∼ 3 K). The Super Spin Glass Tb0.5Gd0.5Cu2 nanoparticles (TN absent, and Tf∼ 20 K) are considered an intermediate disposition in between those two extremes, according to their enhanced random-bond contribution to frustration.This work has been supported by the Spanish MAT2017-83631-C3-R grant. E.M.J.’s work was supported by “Beca de Colaboración”, BDNS: 311327 granted by Ministerio de Educación, Cultura y Deporte and “Beca Concepción Arenal” BDNS: 406333 granted by the Gobierno de Cantabria and the Universidad de Cantabria. MRF work was supported by FPI (BES-2012-058722)
Innovación pedagógica en toxicología: simulación situada, impacto en el aprendizaje
La propuesta de este trabajo busca implementar modelos de “enseñanza con simulaciones escénicas”, en la cual se logre acercar a los alumnos a situaciones y elementos artificiales, pero lo más similares posible a los de la realidad (Joyce y Weil, 2002), a fin de desarrollar en ellos habilidades prácticas útiles para su vida profesional.Eje 1: Innovación y exploración en cambios de modalidades en cursadasFacultad de Ciencias Exacta
Innovación pedagógica en toxicología: simulación situada, impacto en el aprendizaje
La propuesta de este trabajo busca implementar modelos de “enseñanza con simulaciones escénicas”, en la cual se logre acercar a los alumnos a situaciones y elementos artificiales, pero lo más similares posible a los de la realidad (Joyce y Weil, 2002), a fin de desarrollar en ellos habilidades prácticas útiles para su vida profesional.Eje 1: Innovación y exploración en cambios de modalidades en cursadasFacultad de Ciencias Exacta
Drug prescription pattern in exotic pet and wildlife animal practice: a retrospective study in a Spanish veterinary teaching hospital from 2018 to 2022
[EN] Exotic companion animals have had an important role in our society since ancient times. Preserving animal health is necessary to do a responsible use of veterinary medicines. This study aimed to describe the prescription patterns of drugs in exotic pets and wildlife animals attending the Veterinary Teaching Hospital of the University of León (HVULE). A retrospective study was carried out between 2018 and 2022. Birds were the largest group of exotic animals attending the HVULE. Visits were related to emergency reasons and for musculoskeletal disorders. One-third of the animals were eventually euthanised. Regarding pharmacological treatments, the most frequently active ingredients used were pentobarbital, isoflurane, meloxicam, and within antibiotics, marbofloxacin (category B in the classification of European Medicines Agency).S
Uso del fuego y conflictividad social en la montaña cantábrica: el valle del Nansa (1750-1850)
En la montaña Cantábrica, el uso del fuego constituye un método habitual de mantenimiento de las áreas de pasto. A partir de documentación de archivo, se realiza una reconstrucción histórica de esta práctica en el valle del Nansa (Cantabria, España). El análisis de solicitudes y autorizaciones de quema y de expedientes de incendio permite determinar la causalidad, estacionalidad, frecuencia y procedimientos, técnico y administrativo, así como los agentes implicados. Los resultados evidencian distintas motivaciones: las de tipo económico, ligadas a la necesidad de mantener y ampliar la superficie de pasto para una población y cabaña ganadera en aumento; y las de origen social e institucional, vinculadas a actitudes de protesta frente a una administración que limita los usos y derechos de los espacios de monte
El modelado tridimensional y la creación de imágenes de síntesis digital
En el Máster Universitario en Diseño y Desarrollo de Productos e Instalaciones Industriales presentamos una serie de propuestas para desarrollar como proyectos de investigación en la Asignatura Diseño y Fabricación Asistidas por Ordenador (Bloque de Intensificación I) y en el Trabajo Fin de Máster, técnicas de visualización con modelos de iluminación global combinado con técnicas de investigación en aplicaciones informáticas orientadas al diseño.
Estos trabajos han dado lugar a innovar desde el punto de vista docente incorporando nuevas técnicas y métodos en asignaturas como por ejemplo, Representación Fotorrealista y Animación de Productos por Ordenador.
En esta comunicación presentaremos una serie de técnicas que llevamos desarrollando desde el modelado tridimensional del producto hasta la obtención de imágenes de síntesis digital, permitiéndonos obtener una imagen de síntesis digital no sólo del producto original, sino poder cambiar distintas formas y apariencias del mismo así como su integración en distintos entornos de uso o de operación, incluso antes de su posible fabricación.In the context of the official Master's Degree in Design and Product Development and Industrial Installations, we present a number of project proposals to be developed as research projects in the subject Design and Manufacturing ComputerAided (Enrichment Program I). Regarding the final project of the Master, different visualization techniques with global illumination models combined with research techniques in computer applications design with strong design orientation have been studied.
These results have led us to innovate from an educational point of view by incorporating new techniques and methods in subjects such as Photorealistic Representation and Computer Animation.
In this paper a series of techniques are presented, which have been developed from the three-dimensional modelling of the product to the synthetic images, allowing us to get a picture of synthetic images not only from the original product, but also being able to change different shapes and appearances, as well as the integration in different environments of use or operation, even before being manufactured
Online information and availability of three doping substances (anabolic agents) in sports: role of pharmacies
[EN]
Background: The Internet has become an important source for easy access to doping substances, where people and athletes may acquire, outside pharmacies and without a (medical) prescription. These online websites do not always offer quality-assured products, and are outside the regular distribution channels of medicines. The aim of this study was to estimate the availability and accessible information on the Internet about the sale of three doping substances (oxandrolone, DHEA, androstenedione). Methods: Cross-sectional exploratory study, being an observation at a point in time of the online availability of these three doping substances (WADA S1 category: anabolic agents), purchased from Spain, Puerto Rico, Canada, United States, Ukraine and Russia. The characteristics of the websites, the countries the webs sold to, the pharmaceutical forms offered and the recommendations for its use were analyzed by using a computer tool designed ad hoc. Results: There were significant differences between countries in the number of webpages that sold the products (Chi-square test, p < 0.05). Oxandrolone was available for purchase mainly when buying from Spain (27.12%) and Ukraine (26.58%), in websites dedicated to sports (77.26%). For DHEA, most of the pages offered it if the search was done from Canada (23.34%) and Russia (21.44%). Products containing androstenedione or DHEA are claimed to enhance sports performance or for sports use without providing details. Compared to the total number of websites checked, the proportion of pharmacies offering these products was low, ranging from 4.86% for DHEA to 15.79% for androstenedione. Conclusion: The three substances selected are easily available without control through the Internet. Only a small number of websites offering them were online pharmacies, and requested a prescription. Most of the doping substances are purchased from the country where they are requested. Product information described benefits for sports performance, but did not do the same with their side effects. It would be advisable for these products to be sold through pharmacies, to guarantee their quality and provide evidence-based information on their safe use, benefits and risks, and only with a prescription. Athletes should be encouraged to consult health professionals about those supplements suitable for their type of training and sports objectives.S
A One Health view of the West Nile virus outbreak in Andalusia (Spain) in 2020
Reports of West Nile virus (WNV) associated disease in humans were scarce in Spain until summer 2020, when 77 cases were reported, eight fatal. Most cases occurred next to the Guadalquivir River in the Sevillian villages of Puebla del Río and Coria del Río. Detection of WNV disease in humans was preceded by a large increase in the abundance of Culex perexiguus in the neighbourhood of the villages where most human cases occurred. The first WNV infected mosquitoes were captured approximately one month before the detection of the first human cases. Overall, 33 positive pools of Cx. perexiguus and one pool of Culex pipiens were found. Serology of wild birds confirmed WNV circulation inside the affected villages, that transmission to humans also occurred in urban settings and suggests that virus circulation was geographically more widespread than disease cases in humans or horses may indicate. A high prevalence of antibodies was detected in blackbirds (Turdus merula) suggesting that this species played an important role in the amplification of WNV in urban areas. Culex perexiguus was the main vector of WNV among birds in natural and agricultural areas, while its role in urban areas needs to be investigated in more detail. Culex pipiens may have played some role as bridge vector of WNV between birds and humans once the enzootic transmission cycle driven by Cx. perexiguus occurred inside the villages. Surveillance of virus in mosquitoes has the potential to detect WNV well in advance of the first human cases.This study was supported by emergency funds from CSIC [grant number 202030E263]; Agencia Estatal de Investigación under [grant numbers PID2021-123761OB-I00, PGC2018-095704-B-I00, PID2020-116768RR-C21/C22] supported by FEDER Funds; and by the European Commission–NextGenerationEU (Regulation EU 2020/2094), through CSIC’s Global Health Platform (PTI Salud Global) and by Instituto de Salud Carlos III Project "PI19CIII/00014".S
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