Search results for "NAD"
showing 10 items of 2033 documents
Propuesta de criterios de calidad formal para revistas científicas electrónicas basada en aspectos de interacción persona-ordenador
2012
El presente trabajo tiene como objeto la elaboración de una aproximación a una propuesta de estándar que permita establecer un grado de calidad formal mínima para estas publicaciones teniendo en cuenta aspectos relacionados con la Interacción Persona-Ordenador. Para ello se ha analizado una muestra de revistas científicas electrónicas cuya calidad de contenido ha sido certificada. Los resultados obtenidos tras el examen de la accesibilidad, usabilidad y arquitectura de información se han empleado para determinar los problemas más frecuentes que pueden encontrar los usuarios de estas plataformas y se han usado para proponer un modelo de evaluación que recoja la nueva realidad de estas public…
Biotic recovery after the end-Triassic extinction event: Evidence from marine bivalves of the Neuquén Basin, Argentina
2017
We analyze the Late Triassic extinction and Early Jurassic recovery of bivalve faunas within marine environments in the Atuel River area of the Neuquén Basin, Argentina. Data were collected from a hundred samples with invertebrates in a well-exposed uppermost Triassic to lower Jurassic section in the Neuquén Basin (southern Mendoza Province, Argentina) and allow a high-resolution reconstruction of the local diversity dynamics. The nearly continuous presence of marine stenohaline major taxa such as cnidarians, rhynchonelliform brachiopods, echinoderms and cephalopods indicates normal salinity throughout. All bivalve species were identified, and each occurrence was recorded in meters above th…
Bioprospecting of Beneficial Bacteria Traits Associated With Tomato Root in Greenhouse Environment Reveals That Sampling Sites Impact More Than the R…
2021
Tomato is subject to several diseases that affect both field- and greenhouse-grown crops. To select cost-effective potential biocontrol agents, we used laboratory throughput screening to identify bacterial strains with versatile characteristics suitable for multipurpose uses. The natural diversity of tomato root–associated bacterial communities was bioprospected under a real-world environment represented by an intensive tomato cultivation area characterized by extraseasonal productions in the greenhouse. Approximately 400 tomato root–associated bacterial isolates, in majority Gram-negative bacteria, were isolated from three compartments: the soil close to the root surface (rhizosphere, R), …
X-ray powder diffraction study of monoclinic V4+-ZrO2 solid solutions obtained from gels
2003
Abstract Rietveld refinement of six monoclinic V x Zr 1− x O 2 solid solutions, with x =0, 0.01, 0.02, 0.05, 0.075 and 0.1, prepared by heating dried gel precursors at 1300°C in air atmosphere, has been characterized using X-ray powder diffractometer data. The present results confirm that crystal structure of these solid solutions contain V 4+ (Zr 4+ ) cations surrounded by seven oxygens, four at a distance between 2.13 and 2.28 A (referred as to O(2) in the tetrahedrally coordinated oxygens) and other three at a distance between 2.03 and 2.20 A (denoted as O(1) in the triangularly coordinated oxygens). The trends in the lattice parameter variation of V x Zr 1− x O 2 solid solutions specime…
Brief Report: Intestinal Dysbiosis in Ankylosing Spondylitis
2015
Objective Ankylosing spondylitis (AS) is a common, highly heritable immune-mediated arthropathy that occurs in genetically susceptible individuals exposed to an unknown but likely ubiquitous environmental trigger. There is a close relationship between the gut and spondyloarthritis, as exemplified in patients with reactive arthritis, in whom a typically self-limiting arthropathy follows either a gastrointestinal or urogenital infection. Microbial involvement in AS has been suggested; however, no definitive link has been established. The aim of this study was to determine whether the gut in patients with AS carries a distinct microbial signature compared with that in the gut of healthy contro…
Il risarcimento in forma specifica e la rilevanza giuridica dell’attività di compensazione del danno.
2013
The author moves from the premise that the quantum of compensation in specific form can be greater than monetary compensation and aims to show that Article 2058 of the Italian Civil Code gives legal relevance to the different way in which damages are compensated through compensation in specific form rather than monetary compensation. This offers the legal justification for the greater economic value of compensation in specific form as it includes both the cost of damage and the cost to compensate it.
Suicide and Ambient Temperature: A Multi-Country Multi-City Study
2019
Background: Previous literature suggests that higher ambient temperature may play a role in increasing the risk of suicide. However, no multi-country study has explored the shape of the association and the role of moderate and extreme heat across different locations. Objectives: We examined the short-term temperature–suicide relationship using daily time-series data collected for 341 locations in 12 countries for periods ranging from 4 to 40 y. Methods: We conducted a two-stage meta-analysis. First, we performed location-specific time-stratified case-crossover analyses to examine the temperature–suicide association for each location. Then, we used a multivariate meta-regression to combine t…
Protecting sensitive patient groups from imaging using ionizing radiation: effects during pregnancy, in fetal life and childhood
2019
The frequency of imaging examinations requiring radiation exposure in children (especially CT) is rapidly increasing. This paper reviews the current evidence in radiation protection in pediatric imaging, focusing on the recent knowledge of the biological risk related to low doses exposure. Even if there are no strictly defined limits for patient radiation exposure, it is recommended to try to keep doses as low as reasonably achievable (the ALARA principle). To achieve ALARA, several techniques to reduce the radiation dose in radiation-sensitive patients groups are reviewed. The most recent recommendations that provide guidance regarding imaging of pregnant women are also summarized, and the…
Risoluzione del contratto e risarcimento dell’interesse negativo.
2010
Greci e Punici tra il Belice e il Platani. Il caso di Rocca Nadore
2014
La fascia costiera tra la foce del fiume Belice ad Ovest e quella del Platani ad Est è dominata da Rocca Nadore, un’imponente e maestosa montagna, purtroppo irrimediabilmente deturpata da una cava. Sul versante orientale della rocca sono testimoniate, a partire dalla fine del VII sec. a.C., labili tracce di un insediamento sviluppatosi probabilmente in seguito alla fondazione della colonia greca di Selinunte. Nel corso del IV sec. a.C. sulla montagna venne fondato un insediamento fortificato, difeso da tre circuiti di mura che, insieme ad altri abitati fortificati, come quello di San Benedetto di Caltabellotta e quello di Adranon presso Sambuca, doveva far parte di un sistema di difesa lung…