Search results for "Coralli"

showing 10 items of 39 documents

Using growth and geochemical composition of Clathromorphum compactum to track multiscale North Atlantic hydro-climate variability

2020

International audience; Records of ocean/atmosphere dynamics over the past centuries are essential to understand processes driving climate variability. This is particularly true for the Northwest Atlantic which is a key region with an essential role in global climate regulation. Over the past two decades, coralline red algae have been increasingly used as environmental and climatic archives for the marine realm and hold the potential to extend long-term instrumental measurements. Here, we investigate the possibility to extract climate and environmental information from annual growth patterns and geochemical composition of the coralline red algae, Clathromorphum compactum, from Saint-Pierre …

010506 paleontologyPopulationClimate change010502 geochemistry & geophysicsOceanography01 natural sciencesCoralline algaeAtmosphereSclerochronologyEnvironmental reconstructionSclerochronologyClathromorphum compactumClimate change14. Life underwatereducationArctica islandicaEcology Evolution Behavior and Systematics0105 earth and related environmental sciencesEarth-Surface Processeseducation.field_of_studygeographygeography.geographical_feature_categorybiologyACLEnvironmental proxyPaleontologyCoralline algaebiology.organism_classification13. Climate actionArchipelagoPhysical geography[SDE.BE]Environmental Sciences/Biodiversity and EcologyGeology
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Sedimentological implications of an unusual form of the trace fossil Rhizocorallium from the Lower Muschelkalk (Middle Triassic), S. Poland

2011

Specimens of the trace fossil Rhizocorallium isp. with retrusive limbs occur in 10–20-cm-thick composite beds: the bottom layers contain abundant Planolites and Thalassinoides trace fossils, and the top layers are built of horizontally bedded pelitic limestone and contain less bioturbational structures. The first specimens of Rhizocorallium isp. occur just 2–3 cm above the lower surfaces of the top layers. The horizontal protrusive sections are 1 cm high and 1 cm wide. At some sites, the horizontal tunnels end, and the limbs become first obliquely retrusive (45°) at a distance of 1.5–2.5 cm, and then vertically retrusive at a distance of 4–6 cm, or at once vertically retrusive at a similar …

PlanolitesbiologyStratigraphyPalaeontologyPaleontologyGeologyTrace fossilbiology.organism_classificationRhizocoralliumPaleontologyTempestiteThalassinoidesPeliteErosionSedimentologyGeologyFacies
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Le simbiosi in ambiente marino

2011

L’adattamento e la conseguente selezione naturale ha prodotto un’infinita varietà di organismi viventi, ciascuno dotato di peculiari caratteristiche, per consentire ad ogni specie di utilizzare l’ambiente in cui vive. I membri che formano le comunità naturali creano tra di essi dei complessi sistemi fatti di rapporti di competizione e di cooperazione. Questi, contribuiscono ad assicurare l’evoluzione delle specie nell’efficace opera di utilizzazione dell’ambiente. Nell’ambito delle relazioni tra individui di specie diverse esistono alcune singolari associazioni che si evolvono insieme, stabilendo un legame intimo e duraturo che comporta un elevato grado di specializzazione da parte dei cont…

Settore AGR/11 - Entomologia Generale E ApplicataSettore BIO/05 - Zoologiasimbiosi barriera corallina rapporti trofici insetti marini
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Caratterizzazione e Habitat mapping del Coralligeno di piattaforma lungo il margine continentale della Sicilia nord-occidentale

2017

Il Coralligeno di piattaforma è un indicatore ambientale e hotspot di biodiversità nelle zone marine costiere. Poiché esso viene considerato un ecosistema marino vulnerabile, numerose sono le azioni volte alla sua completa caratterizzazione e mappatura. L'obiettivo del lavoro è di confrontare differenti metodologie utilizzate nell’analisi della distribuzione del Coralligeno di piattaforma, applicate al settore offshore della Sicilia nord-occidentale. Il focus del lavoro consiste nell’evidenziare come l’approccio multidisciplinare sia fondamentale nelle fasi di individuazione, caratterizzazione e predizione statistica della distribuzione delle associazioni biocenotiche, al fine di eseguire u…

Settore GEO/02 - Geologia Stratigrafica E SedimentologicaCoralligeno di piattaforma Habitat mapping Maxent
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Raman Investigations to Identify Corallium rubrum in Iron Age Jewelry and Ornaments

2016

International audience; During the Central European Iron Age, more specifically between 600 and 100 BC, red precious corals (Corallium rubrum) became very popular in many regions, often associated with the so-called (early) Celts. Red corals are ideally suited to investigate several key questions of Iron Age research, like trade patterns or social and economic structures. While it is fairly easy to distinguish modern C. rubrum from bone, ivory or shells, archaeologists are confronted with ancient, hence altered, artifacts. Due to ageing processes, archaeological corals lose their intensive red color and shiny surface and can easily be confused with these other light colored materials. We pr…

polyeneslcsh:QE351-399.2[SHS.ARCHEO]Humanities and Social Sciences/Archaeology and PrehistoryDistribution networks02 engineering and technologyBiology010502 geochemistry & geophysics01 natural sciencescorals; shells; Raman spectroscopy; biogenic carbonates; carotenoids; polyenes; color fading; material degradation; archaeology[CHIM.ANAL]Chemical Sciences/Analytical chemistryArchaeological researchMaterial DegradationCorallium rubrumcoral0105 earth and related environmental sciencesmaterial degradationlcsh:MineralogyEcologycarotenoidscolor fadingGeologyOrnamentsarchaeology021001 nanoscience & nanotechnologyGeotechnical Engineering and Engineering Geologybiogenic carbonatesshellscoralsIron AgeRaman spectroscopy0210 nano-technology[SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/MineralogyMinerals
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Freshening of the Alaska Coastal Current recorded by coralline algal Ba/Ca ratios

2011

Arctic Ocean freshening can exert a controlling influence on global climate, triggering strong feedbacks on ocean‐atmospheric processes and affecting the global cycling of the world’s oceans. Glacier‐fed ocean currents such as the Alaska Coastal Current are important sources of freshwater for the Bering Sea shelf, and may also influence the Arctic Ocean freshwater budget. Instrumental data indicate a multiyear freshening episode of the Alaska Coastal Current in the early 21st century. It is uncertain whether this freshening is part of natural multidecadal climate variability or a unique feature of anthropogenically induced warming. In order to answer this, a better understanding of past var…

Atmospheric Science010504 meteorology & atmospheric sciencesTemperature salinity diagramsSoil ScienceAquatic Science010502 geochemistry & geophysicsOceanography01 natural sciencesGeochemistry and PetrologySclerochronologyEarth and Planetary Sciences (miscellaneous)14. Life underwaterGlacial periodPrecipitation0105 earth and related environmental sciencesEarth-Surface ProcessesWater Science and TechnologyEcologybiologyOcean currentPaleontologyCoralline algaeForestrybiology.organism_classificationGeophysicsOceanographyArctic13. Climate actionSpace and Planetary ScienceGeologyPacific decadal oscillationJournal of Geophysical Research
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Coralli siciliani nelle collezioni dei Principi di Ligne

2009

studio storico-artistico della collezione di coralli siciliani conservati presso il castello di Beloeil in Belgio

Coralli Sicilia viceré Ligne Palermo
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Arti applicate siciliane nelle collezioni dei Principi di Ligne: le ragioni storico-culturali di una raccolta

2008

Coralli viceré Sicilia XVII secolo
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Apparati effimeri e arti decorative: carri di trionfo in corallo

2013

L’articolo illustra le profonde connessioni tra gli apparati effimeri con carri trionfali realizzati in occasione dei Festini di Santa Rosalia tra la fine del XVII e l’inizio del XVIII secolo a Palermo, disegnati dai famosi Architetti del Senato Paolo e Giacomo Amato, e la parallela produzione di superbi carri di trionfo in corallo. Vengono analizzate opere custodite non soltanto in musei e in collezioni private siciliane, ma anche nel resto d’Italia e all’estero, tutte opere di maestranze trapanesi. Viene inoltre segnalato e studiato un inedito trionfo di corallo di collezione privata di Palermo, raffigurante, sopra l’usuale carro, l’incontro tra la Madonna e Gesù Risorto.

Settore L-ART/04 - Museologia E Critica Artistica E Del Restauroarti decorativeApparati effimeri; arti decorative; carri di trionfo coralli Paolo e Giacomo Amatocarri di trionfo coralli Paolo e Giacomo AmatoApparati effimeri
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Development of Phosphatized Calcium Carbonate Biominerals as Bioactive Bone Graft Substitute Materials, Part I: Incorporation of Magnesium and Stront…

2018

Synthetic materials based on calcium phosphate (CaP) are frequently used as bone graft substitutes when natural bone grafts are not available or not suitable. Chemical similarity to bone guarantees the biocompatibility of synthetic CaP materials, whereas macroporosity enables their integration into the natural bone tissue. To restore optimum mechanical performance after the grafting procedure, gradual resorption of CaP implants and simultaneous replacement by natural bone is desirable. Mg and Sr ions released from implants support osteointegration by stimulating bone formation. Furthermore, Sr ions counteract osteoporotic bone loss and reduce the probability of related fractures. The presen…

lcsh:R5-920porous calcium phosphatebone graft substitute materialslcsh:Biotechnologylcsh:TP248.13-248.65coralline hydroxyapatitebioactive implant materialsstrontiumresorbable implant materialsmagnesiumlcsh:Medicine (General)phosphatized sea urchin spinesArticleJournal of Functional Biomaterials
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