Search results for "49"
showing 10 items of 1208 documents
Impacts of oak deforestation and rainfed cultivation on soil redistribution processes across hillslopes using 137Cs techniques
2021
Abstract Background As one of the main components of land-use change, deforestation is considered the greatest threat to global environmental diversity with possible irreversible environmental consequences. Specifically, one example could be the impacts of land-use changes from oak forests into agricultural ecosystems, which may have detrimental impacts on soil mobilization across hillslopes. However, to date, scarce studies are assessing these impacts at different slope positions and soil depths, shedding light on key geomorphological processes. Methods In this research, the Caesium-137 (137Cs) technique was applied to evaluate soil redistribution and soil erosion rates due to the effects …
Torsional shear strength and elastic properties of adhesively bonded glass-to-steel components
2020
Nowadays glass is widely used in building applications and coupled to steel through adhesive joining. Reliable mechanical characterization of these joints is necessary to design and predict the final structure performance.In this framework, the aim of this paper is to measure the pure shear strength and elastic modulus for design and modelling of adhesive joined glass-to-steel structures.Torsional shear strength and elastic properties of an adhesively bonded glass-to-steel component were measured on several joined steel-to-steel and steel-to-glass samples.An epoxy resin-based adhesive was used as joining material for AISI304 steel and soda-lime glass.The same steel and adhesive were used to…
Le singulier et le collectif : apories du totalitarisme culturel
2015
OS nat; National audience; Tout : vague et imposant petit mot. Présent à tout bout de champ, dans tant d'expressions, de toute éternité et en toute modestie. Ce mot-là, ce n'est pas rien. Les articles qui suivent explorent les rapports de tout et de rien, et les valeurs que prend le tout à différentes époques : comment il est représenté – personnifié ? – et comment il est présupposé dans la démarche même d'écriture. Car l'ambition de la littérature est peut-être bien de dire tout : dire la totalité du monde, d'une société, d'une époque, dire le rapport – forcément spirituel ? – au tout qui ne se laisse saisir, tout dire de soi, ou encore utiliser tous les mots du dictionnaire. Quelle que so…
The transformation of classical paradigms in a debated Christian tragedy
2018
Resumen: A pesar de haber sido publicada en una traducción del original griego al castellano hace 30 años, la Pasión de Cristo, una tragedia-centón atribuida en la tradición manuscrita a Gregorio de Nacianzo, ha recibido escasa atención por parte de la literatura científica hispanófona. En nuestro articulo deseamos proponer algunas reflexiones que puedan contribuir al largo debate relativo a una obra problemática en cuanto a la determinación de su autoría y datación, haciendo hincapié en algunos aspectos que evidencian su singularidad formal y de contenido, subrayando su lograda síntesis entre cultura clásica y sensibilidad cristiana. Abstract: Despite having been published in a translation…
What is a tree in the Mediterranean Basin hotspot? A critical analysis
2019
Background: Tree species represent 20% of the vascular plant species worldwide and they play a crucial role in the global functioning of the biosphere. The Mediterranean Basin is one of the 36 world biodiversity hotspots, and it is estimated that forests covered 82% of the landscape before the first human impacts, thousands of years ago. However, the spatial distribution of the Mediterranean biodiversity is still imperfectly known, and a focus on tree species constitutes a key issue for understanding forest functioning and develop conservation strategies. Methods: We provide the first comprehensive checklist of all native tree taxa (species and subspecies) present in the Mediterranean-Europ…
Olivier Messiaen: el músico rítmico
2014
Guillem Peire de Cazals. D’una leu chanso ai cor que m’entremeta (BdT 227.8)
2016
L’articolo propone una nuova edizione critica di D’una leu chanso ai cor que m’entremeta di Guillem Peire de Cazals, accompagnata da un commento volto a contestualizzare la canzone entro la modalità poetica della mala canso. Il testo, una vera e propria ‘canzone di disamore’, è databile agli anni 1229-1230 e costituisce un cambiamento di rotta da parte del trovatore caorsino, sia sul piano tematico che sul piano stilistico. Il riflesso di tale cambiamento è ravvisabile fin dal binomio incipitale, leu chanso – che si carica di un particolare sovrasenso retorico –, e prosegue nel corso del récit, dove si rintraccia l’uso di un vocabolario e di temi tipici della ‘modalità’ del disamore. This a…
MMP-10/stromelysin-2 promotes invasion of head and neck cancer.
2011
BackgroundPeriostin, IFN-induced transmembrane protein 1 (IFITM1) and Wingless-type MMTV integration site family, member 5B (Wnt-5b) were previously identified as the invasion promoted genes of head and neck squamous cell carcinoma (HNSCC) by comparing the gene expression profiles between parent and a highly invasive clone. We have previously reported that Periostin and IFITM1 promoted the invasion of HNSCC cells. Here we demonstrated that Wnt-5b overexpression promoted the invasion of HNSCC cells. Moreover, stromelysin-2 (matrix metalloproteinase-10; MMP-10) was identified as a common up-regulated gene among Periostin, IFITM1 and Wnt-5b overexpressing HNSCC cells by using microarray data s…
Fenología de los bracónidos (hymenoptera, ichneumonoidea, braconidae) del pirineo andorrano
2006
Phenology of the Braconidae (Hymenoptera, Ichneumonoidea) at Andorra has been conducted/studied using a Malaise trap after a one-year cycle during 1993. A total of 1.892 specimens, representing 23 subfamilies and 79 genera were sampled. About 93.7% of the captures were koinobiont braconids, whereas 6.3% belonged to idiobiont braconids. The annual phenology has been characterized through the correlation between the evolution of the collected braconids and the weather (meteorological conditions). The maximum of the populations were registered between the two rain periods. In fact, the family Braconidae shows an abundance peak from middle of May to end of August, due to the xerothermic conditi…