Search results for "Root"
showing 10 items of 1237 documents
Threshold Effects in the US Budget Deficit
2003
We contribute to the debate on whether the large U.S. federal budget deficits are sustainable in the long run. We model the U.S. government deficit per capita as a threshold autoregressive process. We find evidence that the U.S. budget deficit is sustainable in the long run and that economic policymakers will intervene to reduce per capita deficit only when it reaches a certain threshold.
Information Greater than Mobilisation Greater than Interaction: Contours of a Pan-European Style of Social Media Campaigning
2021
This chapter compares the Facebook campaigns of 90 political parties aggregated by the political groups in the EP to which they belong from 12 countries in the 2019 EP election. Based on these results we identify the contours of a pan-European style of social media campaigning that can be described as follows: national contexts dominated and framed the EP elections. In comparison to the three key functions of election campaigns, parties place the most importance by far on information in their use of social media. Calls for mobilisation play a certain role, while the parties seem hardly interested in interactions. The ongoing neglect of social media’s interactive potential in politics calls …
Construyendo comunes para el derecho a la ciudad a través de la innovación social colectiva en la distribución y consumo: explorando un marco concept…
2022
En la actual crisis urbana, el nuevo municipalismo reclama la reconstrucción de comunes urbanos para avanzar en el derecho a la ciudad. Señala al respecto la importancia de los movimientos sociales y de la acción pública municipal para generar procesos de innovación social “desde abajo”. Sin embargo, no se ha explorado suficientemente la literatura sobre innovación social con miras a comprender la construcción de comunes urbanos. Por ello, este trabajo propone, a partir de la literatura sobre innovación social de base, un marco para explorar prácticas de generación de comunes desde la ciudadanía, así como políticas municipales que pueden articularse para apoyarlas. El marco se emplea para e…
Consideraciones clínicas sobre la resorción radicular externa por impactación dentaria
2003
-Leopoldo.Forner@uv.es La resorción externa por presión (RREP) consiste en una pérdida de tejido dentinario y cementario de las raíces dentarias que se origina a nivel del ligamento periodontal, ocasionada por presiones prolongadas y mantenidas sobre la raíz. Presentamos tres casos con diferente repercusión y tratamiento. Según el distinto grado de afectación se describe y clasifica el tratamiento de RREP a causa de dientes impactados. En cuanto a la restauración de RREP se perfila la cavidad clase V de diseño 5 y el empleo de cermet o amalgamas de plata para su relleno. Pressure external root resorption (PERR) is a loss of dental root tissues (dentine and cementum) that begin in the period…
Triterpenoid saponins from the roots of two Gypsophila species.
2013
Two triterpenoid saponins with two known ones have been isolated from the roots of Gypsophila arrostii var. nebulosa, and two new ones from the roots of Gypsophila bicolor. Their structures were established by extensive NMR and mass spectroscopic techniques as 3-O-β-d-galactopyranosyl-(1→2)-[β-d-xylopyranosyl-(1→3)]-β-d-glucuronopyranosylquillaic acid 28-O-β-d-xylopyranosyl-(1→4)-[β-d-glucopyranosyl-(1→3)]-α-l-rhamnopyranosyl-(1→2)-[β-d-glucopyranosyl-(1→4)]-β-d-fucopyranosyl ester (1), 3-O-β-d-galactopyranosyl-(1→2)-[β-d-xylopyranosyl-(1→3)]-β-d-glucuronopyranosylgypsogenin 28-O-β-d-xylopyranosyl-(1→4)-[β-d-glucopyranosyl-(1→3)]-α-l-rhamnopyranosyl-(1→2)-[β-d-glucopyranosyl-(1→4)]-β-d-fuco…
Campagnes, migrations internationales et nouvel ordre social ethnicisé. La zone viticole Utiel-Requena (Espagne)
2021
Utiel-Requena est une zone viticole traditionnelle de la province de Valence (Espagne), qui a connu une importante restructuration productive, l’arrivée de travailleurs immigrants et leur enracinement familial. Cet article aborde cette installation et les changements qu’elle a générés dans ces municipalités. Notre analyse des différentes sphères de la vie locale, telles que le travail, les espaces et services publics, la coexistence et les représentations symboliques, montre la constitution d’un ordre social ethnicisé qui consolide la position subalterne des immigrants et de leurs descendants. Utiel-Requena is a traditional wine-growing area in the province of Valencia (Spain), which has un…
Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
2020
Particles beyond the Standard Model (SM) can generically have lifetimes that are long compared to SM particles at the weak scale. When produced at experiments such as the Large Hadron Collider (LHC) at CERN, these longlived particles (LLPs) can decay far from the interaction vertex of the primary proton–proton collision. Such LLP signatures are distinct from those of promptly decaying particles that are targeted by the majority of searches for new physics at the LHC, often requiring customized techniques to identify, for example, significantly displaced decay vertices, tracks with atypical properties, and short track segments. Given their non-standard nature, a comprehensive overview of LLP…
Adhesive root hairs facilitate Posidonia oceanica seedling settlement on rocky substrates
2015
Posidonia oceanica, the dominant Mediterranean seagrass, has been historically described as a species typically growing on mobile substrates whose development requires precursor communities. During more than 10 years of direct observations, we noticed that P. oceanica seedlings were often firmly anchored to rocky reefs, even at exposed sites. Thus, we analysed the ultrastructural features of seedling root systems to identify specific traits that may represent adaptations for early seedling anchorage on rocky bottoms. Subapical sections of adventitious roots were obtained from 2-3 months old specimens collected in the field and were observed at SEM revealing an extensive coverage of adhesive…
Root Canal Morphology and Configuration of the Mandibular Canine: A Systematic Review
2021
The aim of this study was to systematically review the root canal morphology and configuration (RCC) of mandibular canines (MaCa). The review was registered in the PROSPERO database (ID-272297) and it was carried out following the PRISMA guidelines. Three electronic databases (MEDLINE via PubMed, Embase, Scopus) were searched. Randomized controlled trials, cross-sectional, cohort, comparative, evaluation and validation studies have been included. The anatomical quality assessment (AQUA) tool was used for a quality assessment of the anatomical studies. Of 910 studies retrieved from the systematic search, 28 studies investigating RCCs were included. Most MaCa were single-rooted (87.9–100%), w…
A comparative analysis of genetic variation in rootstocks and scions of old olive trees – a window into the history of olive cultivation practices an…
2014
Background Past clonal propagation of olive trees is intimately linked to grafting. However, evidence on grafting in ancient trees is scarce, and not much is known about the source of plant material used for rootstocks. Here, the Simple Sequence Repeat (SSR) marker technique was used to study genetic diversity of rootstocks and scions in ancient olive trees from the Levant and its implications for past cultivation of olives. Leaf samples were collected from tree canopies (scions) and shoots growing from the trunk base (suckers). A total of 310 trees were sampled in 32 groves and analyzed with 14 SSR markers. Results In 82.7% of the trees in which both scion and suckers could be genotyped, t…