Generalized Henneberg Stable Minimal Surfaces

We generalize the classical Henneberg minimal surface by giving an infinite family of complete, finitely branched, non-orientable, stable minimal surfaces in R3. These surfaces can be grouped into subfamilies depending on a positive integer (called the complexity), which essentially measures the number of branch points. The classical Henneberg surface H1 is characterized as the unique example in the subfamily of the simplest complexity m = 1, while for m ≥ 2 multiparameter families are given. The isometry group of the most symmetric example Hm with a given complexity m ∈ N is either isomorphic to the dihedral isometry group D2m+2 (if m is odd) or to Dm+1 × Z2 (if m is even). Furthermore, for m even Hm is the unique solution to the Bj¨orling problem for a hypocycloid of m + 1 cusps (if m is even), while for m odd the conjugate minimal surface H ∗ m to Hm is the unique solution to the Bj¨orling problem for a hypocycloid of 2m + 2 cusps.Universidad de Granada/CBUA CEX2020-001105-M/AEI/10.13039/501100011033Ministry of Science and Innovation, Spain (MICINN) Spanish GovernmentEuropean Commission PID2020-117868GB-I00 Junta de Andalucia P18-FR-4049 A-FQM-139-UGR1

La auditoría financiera y su incidencia en la toma de decisiones de la empresa distribuidora, generadora y comercializadora de servicios públicos de electricidad pangoa S.A.

La presente investigación se realizó en el distrito de Pangoa durante el periodo 2018 en la que participó la empresa Distribuidora Generadora y Comercializadora de Servicios Públicos de Electricidad S.A. del mismo distrito, investigación que relaciona las variables auditoría financiera y toma de decisiones. El propósito de nuestra investigación es mejorar la toma de decisiones a partir de la auditoría financiera como herramienta y/o instrumento de control que permite la implementación de recomendaciones de los auditores financieros para una oportuna toma de decisiones. Existen razones que nos llevan al estudio de estas variables en la medida que se da respuesta a la siguiente interrogante ¿Cómo la auditoría financiera incide en la toma de decisiones de la empresa Distribuidora, Generadora y Comercializadora de Servicios Públicos de Electricidad Pangoa S.A.? La metodología es de enfoque cuantitativo, con el método deductivo, de tipo aplicada, nivel de investigación descriptivo – explicativo. La técnica de investigación relacionada con la recopilación de datos fue la encuesta. Se consideró la muestra igual a la población formada por 45 encuestados entre miembros del directorio, gerencia y trabajadores vinculados a la empresa. Los resultados fueron: cerca al 11% de los encuestados no se encuentran comprometidos en la importancia de comprender la naturaleza e importancia de los informes y que tal desconocimiento tiene un efecto de casi 98% en la toma de decisiones. El comportamiento de la variación de los precios fue hacia el alza y la actividad turística se vio sensiblemente afectada

Effect of Cooking Methods on the Antioxidant Capacity of Plant Foods Submitted to In Vitro Digestion–Fermentation

The antioxidant capacity of foods is essential to complement the body’s own endogenous antioxidant systems. The main antioxidant foods in the regular diet are those of plant origin. Although every kind of food has a di erent antioxidant capacity, thermal processing or cooking methods also play a role. In this work, the antioxidant capacity of 42 foods of vegetable origin was evaluated after in vitro digestion and fermentation. All foods were studied both raw and after di erent thermal processing methods, such as boiling, grilling roasting, frying, toasting and brewing. The cooking methods had an impact on the antioxidant capacity of the digested and fermented fractions, allowing the release and transformation of antioxidant compounds. In general, the fermented fraction accounted for up to 80–98% of the total antioxidant capacity. The most antioxidant foods were cocoa and legumes, which contributed to 20% of the daily antioxidant capacity intake. Finally, it was found that the antioxidant capacity of the studied foods was much higher than those reported by other authors since digestion–fermentation pretreatment allows for a higher extraction of antioxidant compounds and their transformation by the gut microbiota.European Research Commission (Research Executive Agency) under the research project Stance4Health 81630

Study on the situation of catering establishments in Córdoba (pre-COVID-19)

Córdoba es una ciudad con un rico patrimonio cultural. Una parte de dicho patrimonio lo compone una gastronomía con reminiscencias multiculturales. La evolución de la sociedad, unido a la promoción cultural y turística de Córdoba han multiplicado las opciones existentes en restauración en la ciudad en los últimos años. Este estudio analiza el comportamiento de diferentes aspectos de la restauración cordobesa entre el año 2014 y 2019. Para ello se ha realizado una encuesta con cinco años de diferencia a una muestra representativa (1141 establecimientos) de los negocios de las zonas repartidas entre los distritos postales 14001 y 14010. En el cuestionario se han tratado diferentes temas que van desde el tipo de establecimiento, pasando por el número de trabajadores encargados de distintas áreas del establecimiento, hasta precios y platos más demandados entre otras cuestiones. Utilizando como factores de clasificación el año de estudio, estrato social y los distritos postales, se comprueba que han presentado efecto en prácticamente todas las respuestas a las preguntas planteadas, lo que demuestra lo acertado de repetir el estudio en el tiempo y geográficamente. Con los datos obtenidos, se ha elaborado mapas interactivos en los que se puede visualizar la información de las tres variables consideradas más representativas. El objetivo final del estudio es conocer aspectos fundamentales de los negocios de restauración y contrastar su evolución en el periodo de tiempo indicado.Cordoba is a town with a rich cultural heritage. One of the parts of this heritage is made up of a cookery with multicultural reminiscences. The evolution of the society united with a cultural and tourist promotion of Cordoba have boosted the existing choices greatly in the town catering in the last years. This research analyses the performance of different aspects of the Cordoba catering from 2014 to 2019. To do so, a survey has been carried out with five years of difference to a representative sample (1141 establishments) of the shops from the distributed areas between the postal quarters 14001 and 14010. In this survey, different topics have been addressed, it deals with the different types of establishments, the number of workers responsible for the distinct areas of the establishment or prices and dishes more requested between others. Utilising as factors of classification the year of the research, the social stratum and the postal districts, considering that they have presented effect in all the answers to the posed questions in general, it proves that it will be accurate to repeat the research in the future and geographically. With the data obtained, an interactive map has been developed in which the information of the three variables considered most representative can be viewed The final aim of this survey is to know the fundamental aspects of the restaurant businesses and to contrast its evolution in the indicated period of time

An in vitro batch fermentation protocol for studying the contribution of food to gut microbiota composition and functionality

Supplementary information The online version contains supplementary material available at https://doi.org/10.1038/s41596-021-00537-x.This study was supported by the EU project Stance4Health (contract no. 816303) and by the Plan propio de Investigación y Transferencia of the University of Granada under the program ‘Intensificación de la Investigación, modalidad B’ to J.A.R.-H.Knowledge of the effect of foods on gut microbiota composition and functionality is expanding. To isolate the effect of single foods and/or single nutrients (i.e., fiber, polyphenols), this protocol describes an in vitro batch fermentation procedure to be carried out after an in vitro gastrointestinal digestion. Therefore, this is an extension of the previous protocol described by Brodkorb et al. (2019) for studying in vitro digestion. The current protocol uses an oligotrophic fermentation medium with peptone and a high concentration of fecal inoculum from human fecal samples both to provide the microbiota and as the main source of nutrients for the bacteria. This protocol is recommended for screening work to be performed when many food samples are to be studied. It has been used successfully to study gut microbiota fermentation of different foodstuffs, giving insights into their functionality, community structure or ability to degrade particular substances, which can contribute to the development of personalized nutrition strategies. The procedure does not require a specific level of expertise. The protocol takes 4–6 h for preparation of fermentation tubes and 20 h for incubation.EU project Stance4Health (contract no. 816303)Plan propio de Investigación y Transferencia of the University of Granada under the program ‘Intensificación de la Investigación, modalidad

Assessment of leachable elements in volcanic ashfall : a review and evaluation of a standardized protocol for ash hazard characterization.

Volcanic ash presents a widespread and common hazard during and after eruptions. Complex interactions between solid ash surfaces and volcanic gases lead to the formation of soluble salts that may be mobilized in aqueous environments. A variety of stakeholders may be concerned about the effects of ash on human and animal health, drinking water supplies, crops, soils and surface runoff. As part of the immediate emergency response, rapid dissemination of information regarding potentially hazardous concentrations of soluble species is critical. However, substantial variability in the methods used to characterize leachable elements makes it challenging to compare datasets and eruption impacts. To address these challenges, the International Volcanic Health Hazard Network (www.ivhhn.org) organized a two-day workshop to define appropriate methods for hazard assessment. The outcome of this workshop was a ‘consensus protocol’ for analysis of volcanic ash samples for rapid assessment of hazards from leachable elements, which was subsequently ratified by leading volcanological organizations. The purpose of this protocol is to recommend clear, standard and reliable methods applicable to a range of purposes during eruption response, such as assessing impacts on drinking-water supplies and ingestion hazards to livestock, and also applicable to research purposes. Where possible, it is intended that the methods make use of commonly available equipment and require little training. To evaluate method transferability, an interlaboratory comparison exercise was organized among six laboratories worldwide. Each laboratory received a split of pristine ash, and independently analyzed it according to the protocol for a wide range of elements. Collated results indicate good repeatability and reproducibility for most elements, thus indicating that the development of this protocol is a useful step towards providing standardized and reliable methods for ash hazard characterization. In this article, we review recent ash leachate studies, report the outcomes of the comparison exercise and present a revised and updated protocol based on the experiences and recommendations of the exercise participants. The adoption of standardized methods will improve and facilitate the comparability of results among studies and enable the ongoing development of a global database of leachate information relevant for informing volcanic health hazards assessment

Tos por COVID-19: caracterización desde la Inteligencia Artificial

Este trabajo es producto de la investigación del proyecto “Caracterización de la tos provocada por el COVID-19 en pacientes de diagnóstico positivo”, financiado por CEDIA dentro su convocatoria a proyectos de investigación CEPRA XV. La publicación recoge la descripción de la propuesta; el proceso de diseño de la página web utilizada para la toma de muestras audibles de tos; la descripción de técnicas usadas para reconocer una señal de tos dentro de un audio utilizando aprendizaje automático; los sistemas de filtrado utilizados para aislar la señal de tos de cualquier sonido producido por circunstancias externas; y los modelos inteligentes pre-entrenados utilizados para la caracterización de la señal de tos como una tos COVID-19. Además consta información sobre las estrategias para reunir al equipo, generar la propuesta y conseguir su aprobación. En síntesis, la obra presenta un caso exitoso de lo que es el desarrollo de un proyecto de investigación científica bajo la modalidad de financiamiento externo, con sus fases de planificación, ejecución y explotación de los resultados de investigación conseguidos

Brown Spider (Loxosceles genus) Venom Toxins: Tools for Biological Purposes

Venomous animals use their venoms as tools for defense or predation. These venoms are complex mixtures, mainly enriched of proteic toxins or peptides with several, and different, biological activities. In general, spider venom is rich in biologically active molecules that are useful in experimental protocols for pharmacology, biochemistry, cell biology and immunology, as well as putative tools for biotechnology and industries. Spider venoms have recently garnered much attention from several research groups worldwide. Brown spider (Loxosceles genus) venom is enriched in low molecular mass proteins (5–40 kDa). Although their venom is produced in minute volumes (a few microliters), and contain only tens of micrograms of protein, the use of techniques based on molecular biology and proteomic analysis has afforded rational projects in the area and permitted the discovery and identification of a great number of novel toxins. The brown spider phospholipase-D family is undoubtedly the most investigated and characterized, although other important toxins, such as low molecular mass insecticidal peptides, metalloproteases and hyaluronidases have also been identified and featured in literature. The molecular pathways of the action of these toxins have been reported and brought new insights in the field of biotechnology. Herein, we shall see how recent reports describing discoveries in the area of brown spider venom have expanded biotechnological uses of molecules identified in these venoms, with special emphasis on the construction of a cDNA library for venom glands, transcriptome analysis, proteomic projects, recombinant expression of different proteic toxins, and finally structural descriptions based on crystallography of toxins

Superficies mínimas: estabilidad y grupos continuos de isometrías

Tesis Univ. Granada