Search results for "POMA."
showing 10 items of 183 documents
Indagine sul contributo delle fonti bentoniche e planctoniche alla rete trofica del reef a vermeti
2009
Structure and composition of intertidal biofilms which enhance the settlement of the central-Mediterranean reef builder Dendropoma cristatum (Biondi …
2019
Introduction Marine biofilms are complex matrix of microorganisms and mucopolysaccharide substances which develop on all submerged surfaces, providing a variety of physical-bio-chemical cues which affect the settlement of a wide range of benthic organisms. Biofilm community composition, 3-D structure and metabolic activity vary over time. Few studies report the biological and physical changes in marine biofilm development in relationship to their effects on benthic colonisation. Biofilm maturity has been reported to enhance the settlement rate of the central-Mediterranean Dendropoma cristatum (Biondi, 1859), an intertidal vermetid gastropod which builds up ecologically relevant reefs, subje…
Biochemical genetic differentiation between Pomatoschistus marmoratus and P. tortonesei
1999
Several diagnostic genetic markers were identified in Pomatoschistus marmoratus and P. tortonesei using polyacrylamide gel electrophoresis (PAGE) of allozymes. Twenty-one loci were resolved, including the electrophoretic pattern of muscle proteins. The MDH*, PGM1,2*, EST-1,2*, FUM* and PGI-2* loci exhibited different alleles which were fixed for the two species being analysed. Genetic distance, as calculated by Nei's index, showed a value of 0.413. Environmental hypersalinity, could have influenced the geographical distribution of P. tortonesei.
Assessing vermetid reefs as indicators of past sea levels in the Mediterranean
2020
Abstract The endemic Mediterranean reef building vermetid gastropods Dendropoma petraeum complex (Dendropoma spp) and Vermetus triquetrus develop bio-constructions (rims) on rocky shorelines at about Mean Sea Level (MSL) and are therefore commonly used as relative sea-level (RSL) markers. In this study, we use elevations and age data of vermetid reefs to (1) re-assess the vertical uncertainties of these biological RSL indicators, and (2) evaluate the vertical growth rates along a Mediterranean east-west transect, in attempt to explain the differences found in both growth rates and uncertainties. In Israel, Differential Global Positioning System (DGPS) and laser measurements relative to the …
Contribution of planktonic and benthic food sources to the diet of the reef-forming vermetid gastropod Dendropoma petraeum in the western Mediterrane…
2012
Abstract In the Mediterranean Sea, the vermetid Dendropoma petraeum (Monterosato, 1884) forms highly biodiverse reefs that have received increasing attention in recent years although very little is known about the food habit of this species. The main goal of this study was to describe the trophic role of planktonic and benthic food sources for D. petraeum . Specimens from three morphological zones of the reef (inner edge, cuvette and outer edge) at two sites with different wave exposure along the north-western coast of Sicily (Italy; western Mediterranean) were compared for δ 13 C and δ 15 N. Isotopic determinations were also carried out on potential food sources identified in epilithon, re…
Unmanned aerial vehicle technology to assess the state of threatened biogenic formations: The vermetid reefs of mediterranean intertidal rocky coasts
2021
Abstract Vermetid bioconstructions are biogenic formations, built by sessile gastropod molluscs belonging to the family Vermetidae worldwide distributed, occurring in the intertidal and upper subtidal in the rocky shores. In the Mediterranean basin, they occur in complex and tridimensional structures that enhance the local biodiversity, allowing to qualify the structuring species as ecosystem engineers. Due to their ecological relevance and considerable extension along the coasts, we assessed their structural complexity using unmanned aerial vehicle (UAV) technology, as tool of littoral cartography analysis of these bioconstructions, and plaster hemispheres dissolution as a descriptor index…
IPOMAGNESEMIA GRAVE CORRELATA ALL’ASSUNZIONE DI INIBITORE DI POMPA PROTONICA
2017
Gli inibitori di pompa protonica (IPP) sono tra i farmaci più frequentemente assunti nella popolazione anziana, spesso cronicamente, anche per indicazioni non sempre giustificate. Sebbene siano farmaci ben tollerati, emergono sempre nuove e frequenti reazioni avverse. In particolare, negli ultimi anni, sono stati riportati vari case-report di ipomagnesemia insorta dopo terapia prolungata con IPP. Tuttavia, ad oggi, non è stato di-mostrato il meccanismo fisiopatologico con cui queste molecole possono indurre tale disionia. Il magnesio è il secondo catione più abbondante nella cellula e svolge ruoli chiave in molti processi intracellulari. La sua omeostasi è garantita dall’equilibrio tra l’as…
Cushing iatrogeno ed epatopatia in trapiantata renale con sindrome da ipomagnesiemia-ipercalciuria
2002
A CASE OF A PRESACRAL MYELOLIPOMA: IMAGING FINDINGS AND DIFFERENTIAL DIAGNOSIS CHECKLIST OF OTHER PRESACRAL MASSES
2013
PURPOSE: There have been many reports describing adrenal myelolipoma but there have been only few reports of extraadrenal myelolipoma. We describe a case of an elderly woman with lower back pain due to age-related spondyloarthrosis and mild discopathy with a presacral myelolipoma as incidental finding. We also discuss about common and uncommon imaging findings of other presacral masses. METHODS: A 74 years-old woman came to our observation to perform an MRI of the lumbar spine for typical lumbar back pain. MR imaging revealed, in addition to the signs of mild scoliosis and spondylo-disc-arthrosis, a presacral mass showing heterogeneously high signal in all sequences and almost completely su…
SEMEIOTICA NEURORADIOLOGICA E POSSIBILI DIAGNOSI DIFFERENZIALI DI UN RARO CASO DI MIELOLIPOMA PRESACRALE
2013
SCOPO Presentiamo il caso di una paziente anziana (74aa) con tipica sintomatologia da artrosi e discopatia lombo-sacrale (rigidità e dolore alla regione lombare con tipica irradiazione ai glutei ed alla superficie posteriore di entrambi gli arti inferiori, con associata sensazione di intorpidimento) e segni di radicolopatia L4-L5-S1 all’esame obiettivo neurologico, che si presenta alla nostra attenzione per eseguire un esame RM del rachide lombo-sacrale. MATERIALI E METODI L’esame RM è stato eseguito in condizioni di base con sequenze TSE-T1, TSE-T2 e STIR-T2 secondo piani sagittali ed assiali (GE Signa HDxt 1,5T). E’ stata inoltre effettuata un’integrazione RM dopo somministrazione di md…