177 research outputs found
L'impresa dell'outsourcing: strategia e organizzazione in TESS
No full textQuaderni di Economia, Matematica e Statistica - Facoltà di Economia, Università degli Studi di Urbin
I Presidi di Noto e di Ragusa
No full textL'articolo mira ad indagare il lavoro agricolo straniero nei territori di Noto e Ragusa, ove le Caritas diocesane hanno instaurato appositi presidi di legalità a sostegno dei prestatori di lavoro nell'ambito del Progetto Presidio di Caritas italiana.
Nella parte ascrivibile all'Autrice, la ricerca disegna, dapprima, alcuni tratti dell'economia e della filiera agricola locale; poi, si addentra nell'analisi delle condizioni dei lavoratori stranieri nelle due province. Forte di un intreccio tra analisi teorica e ricerca sul campo, lo studio giunge a ravvisare un nesso diretto tra tipo di produzione agricola locale e provenienza geografica del personale ivi impiegato: lavoratrici e lavoratori comunitari rumeni di neoinsediamento (famiglie, donne sole o con prole) nell'ambito della serricoltura ragusana, bisognosa di una presenza permanente di manodopera a basso costo nelle serre; lavoratori extracomunitari magrebini, di più risalente presenza (uomini soli o con donne casalinghe) nel contesto dell'agricoltura siracusana, dove una maggiore propensione verso colture stagionali "a campo aperto" ha consentito alla comunità nordafricana, specie tunisina, di resistere alla concorrenza al ribasso da parte degli stranieri provenienti dall'Est Europa, anche se non propriamente a quella, più recente, dei giovani ospiti dei centri di accoglienza della zona.
E' generale, tuttavia, la tendenza di entrambe le economie locali a produrre sulla scorta di un sistema fondato su una vera e propria gerarchia dello sfruttamento, dalla fase costitutiva del rapporto sino a quella estintiva, non di rado monopolizzata, quest'ultima, da episodi di violenza sessuale a danno delle donne rumene, ingaggiate in vere e proprie forme di lavoro servile e per questo oggetto di attenzione da parte delle stesse istituzioni europee. All'interno di questo contesto è osservabile una positiva tendenza di istituzioni, sindacati e società civile a cooperare per la messa a punto di progetti innovativi, fondati su pratiche di microconcertazione territoriale, nelle quali spicca l'attivismo delle istituzioni prefettizie, ma la totale assenza degli enti locali. In questa cornice sono osservabili nuove pratiche sindacali e iniziative d'inclusività ad alto valore culturale e sociale, sovente dedicate ai figli delle lavoratrici rumene. Restano invece senz'esito i tentativi di governo concertato della filiera attraverso la promozione sul territorio della Rete del lavoro agricolo di qualità
On the Role of Morphology of CoFeO4 Spinel in Methanol Anaerobic Oxidation
No full textA CoFe2O4 inverse spinel calcined at two
different temperatures (450 and 750 °C), in order to modulate
the growth of the crystallites, has been employed in methanol
anaerobic oxidation. A correlation between physicochemical
properties and catalytic performances of the material has been
pursued. The study of both surface and bulk properties has
been carried out by means of different experimental
techniques, among which are X-ray diffraction (XRD),
transmission electron microscopy (TEM), and in situ FTIR
spectroscopy. The FTIR study of both bulk and surface
spectral features reveals that the calcination step is responsible
for the different type of exposed surface sites and as a
consequence for the different catalytic behavior. As the use of
the spinel as the catalyst for methanol transformation into H2 necessarily implies a regeneration step with steam, in order to
recover the oxidative capacity of the solid, both surface and bulk features of the reoxidized solids have been also studied. All
results reveal that the two samples, originally morphologically quite different from one another, become very similar after just one
redox cycle. Still, it has been also demonstrated that both used materials irreversibly modify their surface properties after the reduction/oxidation process
A redox cycle approach for the production of H2 by two-step methanol reforming
No full textIn the present work we studied the catalytic production of pure hydrogen from methanol and water using the spinel-type oxide CoFe2O4 (cobalt ferrite) as electron carrier. CoFe2O4 is an interesting material with an inverse spinel structure, and can be readily prepared by co-precipitation of the two oxides in basic media. The final material was obtained by calcinations, and two different calcination temperatures (Tcalc= 450 and 750°C) have been selected, to yield the corresponding CF450 and CF750 samples. A thorough physico-chemical characterization of the materials as a function of Tcalc was carried out. In fact, Tcalc induces some morphological changes in the material, strongly affecting, by aggregation, particles size and so leading to different catalytic performances. Another important aspect, related to Tcalc, seems to be the surface coke deposition, and this phenomenon should be minimized in order to maximize the hydrogen yield.
This work is aimed at establishing the influence of both crystal size and carbon deposition on the catalytic performance, in order to improve the stability of the material though several RedOx cycles
Oral beclomethasone diproprionate in pediatric active ulcerative colitis: a comparison trial with mesalazine.
No full textPreinfarction angina does not affect infarct size in STEMI patients undergoing primary angioplasty.
No full textImpact of hypertension on infarct size in ST elevation myocardial infarction patients undergoing primary angioplasty.
No full textBACKGROUND:
Hypertension is a well known risk factor for atherosclerosis. However, data on the impact of hypertension in patients with ST-segment elevation myocardial infarction (STEMI) are inconsistent, and mainly related to studies performed in the thrombolytic era, with very few data on patients undergoing primary angioplasty. The aim of the current study was to evaluate the impact of hypertension on scintigraphic infarct size in STEMI patients undergoing primary percutaneous coronary intervention (PCI).
METHOD:
Our population is represented by 830 STEMI patients undergoing primary PCI. Infarct size was evaluated at 30 days by technetium-99m-sestamibi.
RESULTS:
Hypertension was associated with more advanced age (P<0.001), a larger prevalence of diabetes (P=0.001), female sex (P<0.001), but lower prevalence of smoking (P<0.001) and anterior infarction (P=0.042). No difference was observed in ischemia time, cardiogenic shock at presentation, in preprocedural thrombolysis in myocardial infarction (TIMI) flow, and collateral circulation. Hypertension did not affect the rate of postprocedural TIMI 3 flow. Hypertension did not affect infarct size [12.5% (4.1-23.8%) vs. 12.8% (4.3-24.7%), P=0.38]. Similar results were observed in subanalyses in major high-risk subgroups. No impact of hypertension on infarct size was confirmed when the analysis was conducted according to the percentage of patients with infarct size above the median [adjusted odds ratio (95% CI)=0.97 (0.72-1.33), P=0.92].
CONCLUSION:
This study shows that among STEMI patients, undergoing primary PCI hypertension does not affect scintigraphic infarct size
Preinfarction angina does not affect infarct size in STEMI patients undergoing primary angioplasty.
No full textAnti-programmed cell death-1 and anti-programmed cell death ligand-1 immune-related liver diseases: from clinical pivotal studies to real-life experience
No full textIntroduction: Monoclonal antibodies directed against programmed cell death-1 (anti-PD-1) and its ligand (anti-PD-L1) showed a significant efficacy among different immunogenic metastatic tumors such as melanoma, non-small cell lung cancer (NSCLC), renal cell carcinoma (RCC). Between immune-related adverse events (irAEs) dependent on immune checkpoint inhibitors (ICPIs), immune-related liver diseases are uncommon and a definitive diagnosis is not always feasible. Areas covered: We revised data from phase II/III clinical trials and real-world retrospective analyses on liver-related adverse events induced by anti-PD-1 (nivolumab/pembrolizumab) and anti-PD-L1 (atezolizumab) in advanced cancer populations (melanoma, NSCLC and RCC). Furthermore, we described clinical-pathological patterns of immune-related liver diseases in real-life. Expert opinion: Use of anti-PD-1 and anti-PD-L1 led to a paradigm shift in the management of patients with melanoma, NSCLC and RCC. IrAEs can occur potentially in any tissue, leading to discontinuation of ICPIs, at least in a small proportion of these patients, and to a negative impact on their prognosis. Hepatobiliary immune-related adverse events are underestimated due to inappropriate monitoring. Development of novel diagnostic and therapeutic strategies for cancer patients receiving ICPIs as well as the identification of predictive biomarkers of liver injury could allow a better patients’ selection and improve clinical outcomes of immune-related liver diseases
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