Search results for "Ultra"
showing 10 items of 4451 documents
FableAnimals from the ClassicalTradition in La Gran Conquista deUltramar
2021
espanolLa cronica titulada La Gran Conquista de Ultramar encierra una riqueza literaria mayor de lo que se esperaria para dicho genero. La presente contribucion examina algunos casos de insercion de elementos propios de la fabula de animales y de la narracion de corte antropologico, ambos dentro de la tradicion clasica. EnglishThe chronicle entitled La Gran Conquista de Ultramar brings up a much more rich literary samplethan expected because of its genre. Our contribution considers theinsertion ofelements taken from the animal fable and the anthropological narration, both within the Classical tradition.
The influence of soft acidic drinks in exposing dentinal tubules after non-surgical periodontal treatment: a SEM investigation on the protective effe…
2007
Objective: The aim of this study was to investigate the different smear layer morphologies produced by instrumentation with a hand curette and a periodontal sonic scaler for potential removal by soft acidic solution. The effect of a new oxalate-containing phytocomplex spray in preventing tubules exposure after citric acid solution application was also evaluated. Methods: Thirty recently extracted human teeth were used to obtain root dentinal fragments and divided in two groups: Curette treatment (CRT) root planed applying 30 working strokes to each surface using a Gracey?s curette 5-6 and Ultrasonic scaler (USC) treated using a periodontal scaler mounted on an ultrasonic hand-piece for 30 s…
Analysis of ultra-triathlon performances
2011
Romuald Lepers1, Beat Knechtle2,3, Patrizia Knechtle2, Thomas Rosemann2 1INSERM U887, Faculty of Sport Sciences, University of Burgundy, Dijon, France; 2Institute of General Practice and Health Services Research, University of Zurich, Switzerland; 3Gesundheitszentrum St Gallen, St Gallen, Switzerland Abstract: Despite increased interest in ultra-endurance events, little research has examined ultra-triathlon performance. The aims of this study were: (i) to compare swimming, cycling, running, and overall performances in three ultra-distance triathlons, double Ironman distance triathlon (2IMT) (7.6 km swimming, 360 km cycling, and 84.4 km running), triple Ironman distance triathlon (3IMT) (11.…
The nasus gland: A new gland in soldiers of Angularitermes (Termitidae, Nasutitermitinae)
2015
Termites have developed many exocrine glands, generally dedicated to defence or communication. Although a few of these glands occur in all termite species, or represent synapomorphies of larger clades, others are morphological innovations of a single species, or a few related species. Here, we describe the nasus gland, a new gland occurring at the base of the nasus of Angularitermes soldiers. The nasus gland is composed of class 1, 2, and 3 secretory cells, a rare combination that is only shared by the sternal and tergal glands of some termites and cockroaches. The ultrastructural observations suggest that the secretion is produced by class 2 and 3 secretory cells, and released mostly by cl…
Calidad nutricional y bioaccesibilidad de derivados de frutas y vegetales al aplicar tecnologías térmicas y no térmicas (pulsos eléctricos, descargas…
2016
RESUMEN El consumo de una dieta variada y rica en frutas y hortalizas ayuda a prevenir y a tratar ciertas enfermedades crónicas. La elaboración de nuevas bebidas a base de derivados de frutas y vegetales ricas en compuestos bioactivos, puede ayudar al incremento del consumo de estos alimentos y por tanto contribuir a la prevención de diferentes problemas de salud. Por otra parte, la industria alimentaria muestra gran interés en la utilización de Stevia rebaudiana Bertoni como educolorante natural acalórico, como estrategia nutricional con el fin de disminuir la ingesta de azúcar. Además, la stevia contiene sustancias minerales, vitaminas, polifenoles y otros compuestos antioxidantes. En est…
Desigualdad económica y bienestar: tres modelos de justicia social
2011
RESUMEN La crisis económica que comenzó en el verano de 2007 ha provocado que tanto la tasa de desempleo como el porcentaje de personas que se encuentran por debajo del umbral de la pobreza relativa en España ronden el 20%. Si bien en los últimos quince años España ha experimentado fases de crecimiento económico importante, la proporción de personas en riesgo de pobreza se ha mantenido constante. Es probable por tanto que unas tasas negativas o muy escasamente positivas de crecimiento económico comporten un aumento significativo de la pobreza. El trabajo lleva a cabo un análisis de los modelos libertariano y socialdemócrata de justicia social, a partir de la crítica keynesiana a la teoría e…
A study of VUV emission and the extracted electron-ion ratio in hydrogen and deuterium plasmas of a filament-driven H−/D− ion source
2019
Vacuum ultraviolet (VUV) emission diagnostics for studying differences of electron impact processes in hydrogen and deuterium plasmas are presented. The method is applied to study a filament driven multicusp arc discharge negative ion source by comparing the VUV-emission intensities of different emission bands and extracted currents of H−/D− ions and electrons. It was found that the ratio of coextracted electrons to extracted ions is four times higher for deuterium than for hydrogen. No significant differences of the VUV-spectra or volumetric rates of ionization, excitation, production of high vibrational states, and dissociation were found between the plasmas of the two isotopes. The volum…
Caracterización ultraestructural de biopsias nasales en pacientes con Discinesia Ciliar Primaria
2022
El estudio para el diagnóstico de la discinesia ciliar primaria (DCP) tradicionalmente incluye, entre otras pruebas diagnósticas, la evaluación ultraestructural de los axonemas ciliares mediante microscopía electrónica de transmisión (MET). Sin embargo, la identificación de variantes genéticas de DCP con ultraestructura conservada o de cambios sutiles, junto con el desarrollo de nuevas modalidades de diagnóstico para la DCP que permiten la evaluación estructural de los cilios, como el análisis de inmunofluorescencia y una mayor disponibilidad de pruebas genéticas, hace que se cuestione el papel contemporáneo de la MET en el diagnóstico de la DCP. Por otra parte, los estudios de correlación …
Tailoring oxide properties: An impact on adsorption characteristics of molecules and metals
2014
Abstract Both density functional theory calculations and numerous experimental studies demonstrate a variety of unique features in metal supported oxide films and transition metal doped simple oxides, which are markedly different from their unmodified counterparts. This review highlights, from the computational perspective, recent literature on the properties of the above mentioned surfaces and how they adsorb and activate different species, support metal aggregates, and even catalyse reactions. The adsorption of Au atoms and clusters on metal-supported MgO films are reviewed together with the cluster׳s theoretically predicted ability to activate and dissociate O 2 at the Au–MgO(100)/Ag(100…
Chronic cerebrospinal venous insufficiency: state of the art and research challenges
2012
This review discusses a potential vascular basis for multiple sclerosis (MS). The idea that MS could be related to vascular disease is not new, with the first reports describing connections between veins and MS plaques dating from the 19th century. The venous abnormalities found in MS patients, the socalled chronic cerebrospinal venous insufficiency, are currently interpreted as congenital venous malformations. Catheter venography is regarded as the gold standard to assess these lesions, while other tests, such as Doppler sonography and magnetic resonance venography, are much less accurate. Importantly, a relationship between venous pathologies and MS has not yet been proven, especially reg…