302 research outputs found

    IL PATTO DI LAVORO AGILE NELLE PP.AA. VERSO IL POST-EMERGENZA

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    Il saggio affronta la complessa evoluzione del lavoro agile nelle pp.aa., tra emergenza e "nuova" normalità. In particolare, l’A. ricostruisce e dipana le incongruenze e antinomie relative alla questione dei cd. lavoratori fragili nella (e oltre la) pandemia

    The Diagnosis of Mesothelioma in Forensic Pathology

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    5nonenoneGONGOLO F; BROLLO A; RIZZARDI C; COSTANTINIDES F; MELATO M.Gongolo, F; Brollo, A; Rizzardi, Clara; Costantinides, Fulvio; Melato, Maur

    Compact Ag@fe3o4 Core-shell Nanoparticles By Means Of Single-step Thermal Decomposition Reaction

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    A temperature pause introduced in a simple single-step thermal decomposition of iron, with the presence of silver seeds formed in the same reaction mixture, gives rise to novel compact heterostructures: brick-like Ag@Fe3O4 core-shell nanoparticles. This novel method is relatively easy to implement, and could contribute to overcome the challenge of obtaining a multifunctional heteroparticle in which a noble metal is surrounded by magnetite. Structural analyses of the samples show 4 nm silver nanoparticles wrapped within compact cubic external structures of Fe oxide, with curious rectangular shape. The magnetic properties indicate a near superparamagnetic like behavior with a weak hysteresis at room temperature. The value of the anisotropy involved makes these particles candidates to potential applications in nanomedicine.4Brown, M.A., Effects of the operating magnetic field on potential nmr contrast agents (1985) Magn. Reson. 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R15Zhu, H., Zhang, S., Huang, Y.X., Wu, L., Sun, S., Monodisperse m x)fe(3-x)o4 (m 5 fe, cu, co, mn) nanoparticles and their electrocatalysis for oxygen reduction reaction (2013) Nano Lett., 13, p. 2947Nguyen, T.D., Portraits of colloidal hybrid nanostructures: Controlled synthesis and potential applications (2013) Colloids Surf., B 103, p. 326Figueroa, S.J.A., Stewart, S.J., Rueda, T., Hernando, A., De La Presa, P., Thermal evolution of pt-rich fept/fe3o4 heterodimers studied using x-ray absorption near-edge spectroscopy (2011) J. Phys. Chem., C 115, p. 5500Zhang, L., Dou, Y.H., Gu, H.C., Synthesis of ag-fe3o4 heterodimeric nanoparticles (2006) J. Colloid Interf. Sci., 297, p. 660Zhang, L., Dong, W.F., Sun, H.B., Multifunctional superparamagnetic iron oxide nanoparticles: Design, synthesis and biomedical photonic applications (2013) Nanoscale, 5, p. 7664Wang, C., Yin, H., Dai, S., Sun, S., A general approach to noblemetal metal oxide dumbbell. Nanoparticles and their catalytic application for co oxidation (2010) Chem. Mater., 22, p. 3277Yu, S., Label-free immunosensor for the detection of kanamycin using ag-fe3o4 nanoparticles and thionine mixed graphene sheet (2013) Biosens. Bioelectron., 48, p. 224Huang, J., Crystal engineering and sers properties of ag-fe3o4 nanohybrids: From heterodimer to core-shell nanostructures (2011) J. Mater. Chem., 21, p. 17930Sun, L., He, J., Ren, D., An, S., Zhang, J., Facile one-step synthesis of ag@fe3o4 core-shell nanospheres. for reproducible sers substrates (2013) J. Mol. Struct., 1046, p. 74Morones, J.R., The bactericidal effect of silver nanoparticles (2005) Nanotechnology, 16, p. 2346Xu, R., Ag nanoparticles sensitize ir-induced killing of cancer cells (2009) Cell Research, 19, p. 1031Sotiriou, G.A., Pratsinis, S.E., Antibacterial activity of nanosilver ions and particles (2010) Environ. Sci. Technol., 44, p. 5649Seil, J., Webster, T., (2012) Int. J. 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    Formation Mechanism of Maghemite Nanoflowers Synthesized by a Polyol-Mediated Process

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    Magnetic nanoparticles are being developed as structural and functional materials for use in diverse areas, including biomedical applications. Here, we report the synthesis of maghemite (γ-Fe<sub>2</sub>O<sub>3</sub>) nanoparticles with distinct morphologies: single-core and multicore, including hollow spheres and nanoflowers, prepared by the polyol process. We have used sodium acetate to control the nucleation and assembly process to obtain the different particle morphologies. Moreover, from samples obtained at different time steps during the synthesis, we have elucidated the formation mechanism of the nanoflowers: the initial phases of the reaction present a lepidocrocite (γ-FeOOH) structure, which suffers a fast dehydroxylation, transforming to an intermediate “undescribed” phase, possibly a partly dehydroxylated lepidocrocite, which after some incubation time evolves to maghemite nanoflowers. Once the nanoflowers have been formed, a crystallization process takes place, where the γ-Fe<sub>2</sub>O<sub>3</sub> crystallites within the nanoflowers grow in size (from ∼11 to 23 nm), but the particle size of the flower remains essentially unchanged (∼60 nm). Samples with different morphologies were coated with citric acid and their heating capacity in an alternating magnetic field was evaluated. We observe that nanoflowers with large cores (23 nm, controlled by annealing) densely packed (tuned by low NaAc concentration) offer 5 times enhanced heating capacity compared to that of the nanoflowers with smaller core sizes (15 nm), 4 times enhanced heating effect compared to that of the hollow spheres, and 1.5 times enhanced heating effect compared to that of single-core nanoparticles (36 nm) used in this work

    The Basilicata Wealth Fund: Resource Policy and Long-Run Economic Development in Southern Italy

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    This paper contributes to the growing political economy literature of within-country natural resources management, by proposing a new resource policy for the oil-rich southern Italian region of Basilicata. The policy proposal is to establish a (regional) wealth fund in which all the royalty revenues from non-renewable natural resource exploitation in Basilicata would be stored and fully converted into low-risk financial assets. The scope is to give priority to long-run investments as to better exploit revenues from large-scale extraction of natural capital. Establishing a wealth fund at the regional sub-national level is a novel approach that can be applied to other resource-rich regions in the world. I label the fund as the Basilicata Wealth Fund (BWF). The BWF would be a regionally owned investment fund, however independently administered from national authorities (for instance, as an independent legal entity under the jurisdiction of the Bank of Italy). In addition, the paper posits a transparent and clear-cut spending fiscal rule in order to let regional authorities use the resource revenues to finance economic policy. The clear advantage from the BWF would be the stronger focus on long-run economic development and the higher accountability, hence avoiding misuse of resource revenues for myopic fiscal spending

    Association between the donor to recipient ICG-PDR variation rate and the functional recovery of the graft after orthotopic liver transplantation: A case series

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    Background: Despite current advances in liver transplant surgery, post-operative early allograft dysfunction still complicates the patient prognosis and graft survival. The transition from the donor has not been yet fully understood, and no study quantifies if and how the liver function changes through its transfer to the recipient. The indocyanine green dye plasma disappearance rate (ICG-PDR) is a simple validated tool of liver function assessment. The variation rate between the donor and recipient ICG-PDR still needs to be investigated. Materials and methods: Single-center retrospective study. ICG-PDR determinations were performed before graft retrieval (T1) and 24 hours after transplant (T2). The ICG-PDR relative variation rate between T1 and T2 was calculated to assess the graft function and suffering/recovering. Matched data were compared with the MEAF model of graft dysfunction. Objective: To investigate whether the variation rate between the donor ICG-PDR value and the recipient ICG-PDR measurement on first postoperative day (POD1) can be associated with the MEAF score. Results: 36 ICG-PDR measurements between 18 donors and 18 graft recipients were performed. The mean donor ICG-PDR was 22.64 (SD 6.35), and the mean receiver's ICG-PDR on 1st POD was 17.68 (SD 6.60), with a mean MEAF value of 4.51 (SD 1.23). Pearson's test stressed a good, linear inverse correlation between the ICG-PDR relative variation and the MEAF values, correlation coefficient -0.580 (p = 0.012). Conclusion: The direct correlation between the donor to recipient ICG-PDR variation rate and MEAF was found. Measurements at T1 and T2 showed an up- or downtrend of the graft performance that reflect the MEAF values

    Cytotoxic drugs for patients with breast cancer in the era of targeted treatment: Back to the future?

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    Background: Despite current trend of targeted therapy development, cytotoxic agents are a mainstay of treatment of patients with breast cancer. We reviewed recent advances in cytotoxic therapy for patients with metastatic breast cancer (MBC). Materials and methods: Medline searches were conducted for English language studies using the term =MBC= and 'cytotoxic drugs'. The data search was restricted to the period 2000-2011. Results: Several novel cytotoxic compounds, all microtubule inhibitors, have been approved for clinical use in MBC: (i) nab-paclitaxel, reported to improve tumour response and decrease hypersensitivity reactions in comparison with other taxanes; (ii) ixabepilone, shown to have clinical benefit in taxane- and anthracycline-resistant disease and (iii) eribulin, shown to improve overall survival in heavily pre-treated patients, when compared with best available standard treatment. Agents, such as larotaxel, vinflunine, trabectidin and formulations, including cationic liposomal paclitaxel or paclitaxel poliglumex, are currently under evaluation in phase II/III trials. Conclusion: Toxicity and chemotherapy resistance are still major limitations in the treatment of patients with MBC. Further research into new cytotoxic compounds is needed in order to maximise benefit, whilst minimising toxicity
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