5,407 research outputs found
Mitochondrial DNA reveals genetic structuring of <i>Pinna nobilis</i> across the Mediterranean Sea
No full textPinna nobilis is the largest endemic Mediterranean marine bivalve. During past centuries, various human activities have promoted the regression of its populations. As a consequence of stringent standards of protection, demographic expansions are currently reported in many sites. The aim of this study was to provide the first large broad-scale insight into the genetic variability of P. nobilis in the area that encompasses the western Mediterranean, Ionian Sea, and Adriatic Sea marine ecoregions. To accomplish this objective twenty-five populations from this area were surveyed using two mitochondrial DNA markers (COI and 16S). Our dataset was then merged with those obtained in other studies for the Aegean and Tunisian populations (eastern Mediterranean), and statistical analyses (Bayesian model-based clustering, median-joining network, AMOVA, mismatch distribution, Tajima’s and Fu’s neutrality tests and Bayesian skyline plots) were performed. The results revealed genetic divergence among three distinguishable areas: (1) western Mediterranean and Ionian Sea; (2) Adriatic Sea; and (3) Aegean Sea and Tunisian coastal areas. From a conservational point of view, populations from the three genetically divergent groups found may be considered as different management units
La capanna 18 del villaggio protostorico di Bruncu ‘e s’Omu – Villa Verde (OR),
No full textThis work aims to provide information related to a small cross-section of daily life inside a Bronze Age settlement, using the context of the “Hut 18” of the nuragic village of Bruncu 'e S'Omu - Villa Verde (OR) as a model. The built-up area is a context of extreme interest and provides essential data relating to the daily life of the aforementioned period in this area of central-western Sardinia. The study, following a brief historical-geographical introduction of the territory in which the village is located, begins with the description of the general characteristics of the building and continues with the delineation of the stratigraphic sequence; we continue with a typological and chronological proposal of the finds and, finally, with the analyses carried out in the GIS environment, useful for better estimation of the dispersive trends of the materials
Ocean literacy and scientific data acquisition through citizen science campaigns: A mixed approach in the Maltese Islands to collect information on Pinna nobilis and Pinna rudis
No full textThe genus Pinna includes two species in the Mediterranean Sea: Pinna nobilis and Pinna rudis. Both these species are under threat from multiple stressors. Pinna nobilis, in particular, has been exhibiting mass mortality events (MMEs) since 2016. The population and distribution of these species have never been comprehensively explored in the Maltese archipelago, and in this work, we collate information collected between 2006 and 2019 through a number of SCUBA underwater visual census monitoring programs. The logistical barriers surrounding SCUBA-based sampling techniques and the low-density distribution of these species constitute significant obstacles to an extensive conventional population assessment. Citizen science was thus also deployed in this study to supplement the data collected through SCUBA surveys: recreational SCUBA divers worked as citizen scientists, providing data on the distribution of these two endangered species from areas never explored before. This information can be used for assessing the conservation status of P. nobilis and P. rudis in Maltese waters, whilst contributing to the next generation of ocean-literate citizens
Pinna muricata Linnaeus 1758
No full textPinna muricata Linnaeus, 1758 Habitat. Attached by a mass of fine byssus threads in sand and sand rubble mixtures. Usually only the straight posterior edge is visible at the surface. Distribution. Widely distributed throughout the lagoon wherever suitable substrates are present, generally sublittoral. Range. Indo-Pacific [R/M/S]. Figured specimen. 104.1 mm, NMW.Z.1999.073.00012.Published as part of Oliver, P. Graham, Holmes, Anna, Killeen, Ian, Light, Janice & Wood, Harriet, 2004, Annotated checklist of the marine Bivalvia of Rodrigues, pp. 3229-3272 in Journal of Natural History 38 (23) on page 3239, DOI: 10.1080/00222930410001695097, http://zenodo.org/record/525192
Telehealth and Pharmacies: benefits and cocreation opportunities. A case study from Italy
No full textHomocysteine and cardiovascular risk in patients with intestinal transplantation.
No full textPLASMA TOTAL HOMOCYSTEINE (HCY) AS ADDITIONAL CARDIOVASCULAR RISK FACTOR IN PATIENTS WITH INTESTINAL TRANSPLANTATION
G Bianchi, E Pompignoli, A Lauro, G Passerini, R Chianese, A Pinna, M Zoli
Dipartimento di Medicina Interna, Cardioangiologia, Epatologia and Centro Trapianti, Università di Bologna
Transplanted patients show an increased rate of cardiovascular events, probably due to metabolic changes induced by immunosuppressive therapy. Among cardiovascular risk factors, high plasma homocysteine (HiHCY) has an indepedent role. No data are available about HiHCY prevalence in subjects with intestinal transplant (ITX) as effect of immunosuppressive drugs.
21 subjects, ageing 24 to 57, with ITX dating 6 months or more (median 29 months; range 6-69) were tested in 79 determinations. All patients received Tacrolimus (FK) as major immunosuppressive agent. Total Hcy was assayed on chromatography. Routine laboratory data, history of diabetes, hypertension, dyslipidemia, overweight and cardiovascular events, occurred over 6 months from ITX, were recorded. Additional events were recorded during the study period.
ITX subjects showed increased Hcy levels (median 19 mmol/L, range 8.6 – 80.6). 75% of ITX patients had Hcy >15 μmol/L. The same prevalence was observed for patients with mild kidney failure (creatinine levels above 1.7 mg/dl). Patients with normal and increased creatinine did not differ significantly for HCY or prevalence of HiHCY, and no relation was present between the two variables. Total homocysteine plasma levels were related to tacrolimus serum levels (R = 0.305, P < 0.01).
One heart ischemic problem was observed in a patient with severe kidney failure; two patients had problems in abdominal and/or peripheral venous districts, with HiHCY and some signs of the metabolic syndrome. HiHCY is frequently found in ITX patients. Its role in the genesis of cardiovascular events and the usefulness of a HiHCY lowering therapy remains to verify
The intersection of the AMO model and sustainable Human Resource Management. A systematic literature review and research Agenda
No full textSustainability and Human Resource Management (HRM) are intricately linked facets within contemporary organizations. Incorporating sustainability principles into HRM is imperative for firms aiming to harmonize their business practices with environmental, social, and economic sustainability goals by creating a solid sustainable culture that enables firms to attract and retain talents and contribute to advancing a more
sustainable future.
While there is a general agreement that firms engaged in sustainable initiatives can foster employee loyalty, only some studies have deepened the knowledge of the role and effects of the Ability-Motivation-Opportunity (AMO) model in promoting sustainable HRM. AMO model is well-studied in HRM studies, and its relevance is well-known. However, the intersection of AMO studies and sustainable HRM needs to be studied more.
This chapter fills this gap by proposing a Systematic Literature Review on the topic to delineate the state-ofthe-art and discover a new research agenda to suggest future investigations
Sympathetic neurohormonal correlates of linear and symbolic dynamics heart rate variability indexes in chronic heart failure
No full textThe aim of this study was to assess whether in chronic heart failure patients (CHF) linear and nonlinear indexes of heart rate variability (HRV) are associated with the plasma level of norepinephrine, a measure of tonic sympathetic nervous activity. In 99 CHF patients with a 24-hour Holter recording and plasma norepinephrine assay, the absolute (LFP) and normalized (LF-nu) power in the low frequency band (LF, 0.04-0.15Hz), the percentage of 3 beats patterns with no variations (0VP) and with two unlike variations (2UVP) were computed. A significant negative association (Spearman correlation coefficient) was found between LFP and PNE (r=-0.45, p<0.0001) and between LF-nu and PNE (r=-0.26, p<0.01), while the association between both 0VP and 2UVP and PNE was largely nonsignificant (r=-0.07, p=0.47 and r=0.13, p=0.19). The finding that symbolic dynamics indexes were not associated with sympathetic neurohormonal activation, suggests that the physiological link of these variables is limited to the modulation of sympathetic outflow to the sinus node
Notiziario. Villaggio protostorico di Bruncu ‘e s’Omu-Villa Verde (OR): VII campagna di scavi (2019)
No full textMediterranean sponges from shallow subtidal rocky reefs: Cystoseira canopy vs barren grounds
No full textPorifera richness was investigated in Cystoseira canopies vs barren grounds considering different substrates at 6 areas in the Central-Western Mediterranean Sea. In total 31 sponge taxa were recorded at 2–7 m depth and the sponge community structure and composition were characterized by a notably low richness with 25 taxa in the Cystoseira forest and 15 in the barren area. As for the sponge habitus, the massive sponges were dominant in both facies, whereas encrusting, and cavity dwelling sponges were found in higher numbers in the Cystoseira forest. Results revealed that rocky substrata seem to play a key role in driving the sponge community composition and diversity in both facies. In this work we explore the role of Cystoseira canopy as a suitable facies for sponges. Sponge assemblages were persistent, strongly resilient in space occupation and consequently support stability in both facies. Some species seem to be pre-adapted to live under the sub-optimal conditions of the barren grounds, i.e. the absence of the Cystoseira fronds shelter. This focus on sponge successful eco-etological performances in 'submarine deserts' such as barren areas shows features as shown in a few other sessile benthic invertebrates
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