Supernova neutrino physics with a nuclear emulsion detector

The existence of the coherent neutrino-nucleus scattering reaction requires to evaluate, for any detector devoted to WIMP searches, the irreducible background due to conventional neutrino sources and at same time, it gives a unique chance to reveal supernova neutrinos. We report here a detailed study concerning a new directional detector, based on the nuclear emulsion technology. A Likelihood Ratio test shows that, in the first years of operations and with a detector mass of several tens of tons, the observation of the supernova signal can be achieved. The determination of the distance of the supernova from the neutrinos and the observation of $^8$B neutrinos are also discussed.Comment: 22 pages, 12 figure

La persona assistitia nel setting domiciliare secondo il modello per Intensita' di Cure: proposte per l'infermieristica territoriale

L’innalzamento della vita media ha determinato un aumento delle patologie cronico - degenerative collegate spesso alla disabilità, generando nelle famiglie un alto bisogno assistenziale non sempre adeguatamente sostenuto da politiche di protezione. La politica sanitaria attuata negli ultimi anni in Toscana con la Legge 40 del 2005 e il PSR 2008-2010, ha portato ad una progressiva riduzione della percentuale di ospedalizzazione, con conseguente diminuzione dei posti letto negli ospedali per acuti. Questa diminuzione non ha lo scopo di ridurre le risposte necessarie in termini di cura agli utenti ma di determinare uno spostamento di risorse verso i servizi territoriali. Sebbene il ricorso all’ospedale sia sensibilmente ridotto grazie ad una più diffusa attenzione all’uso appropriato di questa risorsa costosa finalizzata al trattamento dell’acuzie, vi sono ancora difficoltà da superare, che richiedono una definizione di competenze e una sinergia virtuosa con il territorio. Il territorio diventa l’ambito elettivo di intervento per la gestione delle cronicità, nella misura in cui l’assistenza territoriale consente al paziente, da un lato di ricevere l’assistenza di cui necessita, rimanendo nel proprio ambiente mantenendo le proprie abitudini quotidiane; dall’altro, consente una riduzione del tasso di ospedalizzazione e un più appropriato impiego delle risorse del SSN. Obiettivo del lavoro: valutare se con il trasferimento del presidio ospedaliero pratese, avvenuto nel 2013, si sia verificato un incremento dell’assistenza domiciliare attraverso il potenziamento dell’offerta territoriale. Metodologia: estrazione dati su applicativo Caribel ed elaborazione su foglio di calcolo Excel raggruppandoli per classi omogenee di intervento infermieristico: C1,C2,C3. Popolazione di riferimento: pazienti in ADI nella provincia di Prato e comuni limitrofi. Periodo di riferimento: 01/01/2012–31/12/2014. Risultati: dal 2012 le prestazioni infermieristiche domiciliari hanno avuto un incremento pari a 33155. Nella Classe 1: aumento degli intereventi di igiene e mobilizzazione > 1.820 pari al 48%; aumento di prelievi ematici domiciliari > 2.532 pari al 7,7%; Classe 2: aumento della gestione del catetere vescicale > 632 pari all’11,4%; aumento delle medicazioni >13.973. Classe 3: aumento degli interventi educativi > 4012 pari all’85,3%; aumento della valutazione e consulenza infermieristica >11.891 pari al 83.5%. Discussione: I dati ottenuti da questa analisi evidenziano che il nuovo ospedale di Prato improntato sul modello per Intensità di Cure, ha determinato un aumento dei casi complessi gestiti a domicilio. Ciò comporta la necessità di valutare: >supporto educativo nelle competenze di base dei caregiver; > delle competenze specifiche rispetto a gestione ad esempio delle ferite difficili; l'evoluzione delle competenze anche attraverso percorsi di formazione complementare, e privilegiando i sistemi a rete e il lavoro in squadra. Conclusioni: la ricerca effettuata sulle attività domiciliari dell’ASL 4 di Prato mette in risalto alcuni punti che si ritengono importanti in funzione della riorganizzazione attuata con la Legge Regionale n.28 del 16/03/2015. Azioni: potenziamento delle Cure Domiciliari strutturata in modo da avere una continuità delle cure H 24 con reperibilità almeno telefonica; realizzare percorsi di cura integrati per la gestione della fragilità in età pediatrica, con uno sguardo al fenomeno della multiculturalità; maggiore integrazione dell’ospedale con il territorio e maggiore organizzazione delle cure in “rete”; è necessario, tuttavia, che sia potenziato il sistema informativo. Omogeneizzazione dei modelli teorici di riferimento per la presa in carico della persona assistita a domicilio; esternalizzazione dei prelievi domiciliari al fine di recuperare personale da dedicare alle Cure Domiciliari

Kinetics of the lipoperoxyl radical-scavenging activity of indicaxanthin in solution and unilamellar liposomes

Abstract The reaction of the phytochemical indicaxanthin with lipoperoxyl radicals generated in methyl linoleate methanol solution by 2,20-azobis(2,4-dimethylvaleronitrile), and in aqueous soybean phosphatidylcholine unilamellar liposomes by 2,20-azobis(2- amidinopropane)hydrochloride, was studied. The molecule acts as a chain-terminating lipoperoxyl radical scavenger in solution, with a calculated inhibition constant of 3.63 £ 105M21 s21, and a stoichiometric factor approaching 2. Indicaxanthin incorporated in liposomes prevented lipid oxidation, inducing clear-cut lag periods and decrease of the propagation rate. Both effects were concentration-dependent, but not linearly related to the phytochemical concentration. The consumption of indicaxanthin during liposome oxidation was remarkably delayed, the lower the concentration the longer the time-interval during which it remained in its native state. Indicaxanthin and a-tocopherol, simultaneously incorporated in liposomes, exhibited cooperative antioxidant effects and reciprocal protective interactions. The extent of synergism decreased at the increase of the ratio (indicaxanthin)/(a-tocopherol). A potential antioxidant mechanism of indicaxanthin is discussed in the context of the chemistry of the molecule, and of the possible reactivity of a short-lived intermediate. Keywords: Indicaxanthin, phytochemical, lipid oxidation, nutritional valu

Phytochemical indicaxanthin suppresses 7-ketocholesterol-induced THP-1 cell apoptosis by preventing cytosolic Ca++ increase and oxidative stress

7-Ketocholesterol (7-KC)-induced apoptosis of macrophages is considered a key event in the development of human atheromas. In the present study, the effect of indicaxanthin (Ind), a bioactive pigment from cactus pear fruit, on 7-KC-induced apoptosis of human monocyte/macrophage THP-1 cells was investigated. A pathophysiological condition was simulated by using amounts of 7-KC that can be reached in human atheromatous plaque. Ind was assayed within a micromolar concentration range, consistent with its plasma level after dietary supplementation with cactus pear fruit. Pro-apoptotic effects of 7-KC were assessed by cell cycle arrest, exposure of phosphatidylserine at the plasma membrane, variation of nuclear morphology, decrease of mitochondrial trans-membrane potential, activation of Bcl-2 antagonist of cell death and poly(ADP-ribose) polymerase-1 cleavage. Kinetic measurements within 24 h showed early formation of intracellular reactive oxygen species over basal levels, preceding NADPH oxidase-4 (NOX-4) over-expression and elevation of cytosolic Ca2þ, with progressive depletion of total thiols. 7-KC-dependent activation of the redox-sensitive NF-kB was observed. Co-incubation of 2·5mM of Ind completely prevented 7-KC-induced pro-apoptotic events. The effects of Ind may be ascribed to inhibition of NOX-4 basal activity and over-expression, inhibition of NF-kB activation, maintaining cell redox balance and Ca homeostasis, with prevention of mitochondrial damage and consequently apoptosis. The findings suggest that Ind, a highly bioavailable dietary phytochemical, may exert protective effects against atherogenetic toxicity of 7-KC at a concentration of nutritional interest

A Diagnosis of Inflammatory Pseudotumor of the Liver by Contrast Enhaced Ultrasound and Fine-Needle Biopsy: A Case Report

Inflammatory pseudotumor (IPT) of the liver is a rare, benign lesion of unclear etiology, which may be misdiagnosed as hepatocellular carcinoma, cholangiocarcinoma, secondary tumor or abscess, because of its non-specific clinical, biochemical and radiologic findings. We present the case of a 48-old-year male in whom diagnosis of liver IPT was suspected by contrast enhanced ultrasound (CEUS) and confirmed by fine-needle liver biopsy. The diagnosis is in contrast to most of the literature reports in which the diagnosis was made only based on a surgical specimen

Trans-epithelial transport of the betalain pigments indicaxanthin and betanin across Caco-2 cell monolayers and influence of food matrix

Purpose: This study investigated the absorption mechanism of the phytochemicals indicaxanthin and betanin and the influence of their food matrix (cactus pear and red beet) on the intestinal transport. Methods: Trans-epithelial transport of dietary-consistent amounts of indicaxanthin and betanin in Caco-2 cell monolayers seeded on TranswellR inserts was measured in apical to basolateral (AP-BL) and basolateral to apical (BL-AP) direction, under an inwardly directed pH gradient (pH 6.0/7.4, AP/BL) mimicking luminal and serosal sides of human intestinal epithelium. The effect of inhibitors of membrane transporters on the absorption was also evaluated. Contribution of the paracellular route was investigated after EDTA treatment of the cell monolayer. In vitro digestion of betalainic food was performed to provide a post-intestinal fraction containing bioaccessible pigments. Results: Apparent permeability coefficients (P app) in the absorptive direction were (4.4 ± 0.4) × 10-6 and (3.2 ± 0.3) × 10-6 cm s-1 for indicaxanthin and betanin, respectively. Transport of indicaxanthin was non-polarized, linear as a function of time and concentration, and unaffected by inhibitors of membrane transporters. Betanin exhibited significantly different bidirectional P app values and non-linear efflux kinetics. The concentration- dependent betanin efflux was described by a kinetic model including one non-saturable (K d = 0.042 μL cm-2 min-1) and one saturable component identified as the apical multidrug resistance-associated protein 2 (MRP2; K m = 275 μM; J max = 42 pmol min-1 cm-2). Permeation of both betalains increased remarkably after EDTA treatment of the cell monolayer. Neither indicaxanthin nor betanin underwent metabolic transformation. Food matrix did not affect trans-epithelial transfer of indicaxanthin, but reduced the absorption rate of betanin, red beet more than cactus pear. Conclusions: Dietary indicaxanthin and betanin can substantially be absorbed through paracellular junctions of intestinal epithelial cells. Additional trans-membrane permeation can be considered for betanin, whose absorption is limited by a MRP2-mediated efflux and negatively affected by its food matrix. Present findings are consistent with the quite higher bioavailability of indicaxanthin over betanin established in humans. © 2012 Springer-Verlag

Pro-apoptotic activity of the phytochemical Indicaxanthin on colorectal carcinoma cells (Caco-2) and epigenetic CpG demethylation of the promoter and reactivation of the expression of p16

Phytochemicals play prominent roles in human diet and nutrition as protective redo-active substances in prevention of several disorders and chronic diseases in humans. Today, their function as potent modulators of the mammalian epigenome-regulated gene expression is rapidly emerging. In the present study antiproliferative effects of Indicaxanthin (Ind) from the fruits of Opuntia ficus-indica (1), and potential influence on DNA methylation has been investigated on Caco-2 cells, a human cell line of colorectal carcinoma. Ind caused a clear dose- and time-dependent decrease of the cell proliferation (IC(50) 50 M) associated to apoptosis as demonstrated by phosphatidylserine externalization and depolarization of mithocondrial membrane. Ind decreased the Go-G1phase whereas increased S and G2-M phases of the cell cycle. The phytochemical did not altered the intracellular ROS levels but decreased the [Ca2+]i. Investigation on DNA methylation using MESAP-PCR (Methylation-Sensitive Arbitrarily-Primed Polymerase Chain Reaction) (2), showed that 100 M Ind induced a slight global demethylation after a 48 h treatment. Analysis of epigenetic changes in the DNA methylation pattern at CpG promoter of p16 (INK4a), using MSRE (Methylation-Sensitive Restriction Endonucleases Multiplex-Polymerase Chain Reaction), showed that Ind caused CpG demethylation. Western blotting analysis carried out with p16 monoclonal antibody, confirmed the reactivation of the protein expression. Present data, suggesting that a long-term exposure to indicaxanthin in diet might potentially affect epigenetic machines of the intestinal cells, preventing or repairing initial derangements/disorders, encourage studies on the mechanism involved

Antioxidant activity of Sicilian Pistachio (Pistacia vera, L. var. Bronte) nut extracts and its bioactive components

Pistacia vera L. is the only species of Pistacia genus producing edible nuts. This paper investigates the antioxidant potential of a Sicilian variety of pistachio nut by chemical as well as biological assays and measured antioxidant vitamins and a number of antioxidant polyphenols in either the hydrophilic and/or the lipophilic nut extract. In accordance with the majority of foods, the total antioxidant activity, measured as a TAA test, was much higher (50-fold) in the hydrophilic than in the lipophilic extract. Substantial amounts of total phenols were measured. The hydrophilic extract inhibited dose- dependently both the metal-dependent and -independent lipid oxidation of bovine liver microsomes, and the Cu+2-induced oxidation of human low-density lipoprotein (LDL). Peroxyl radical-scavenging as well as chelating activity of nut components may be suggested to explain the observed inhibition patterns. Among tocopherols, γ-tocopherol was the only vitamin E isomer found in the lipophilic extract that did not contain any carotenoid. Vitamin C was found only in a modest amount. The hydrophilic extract was a source of polyphenol compounds among which trans-resveratrol, proanthocyanidins, and a remarkable amount of the isoflavones daidzein and genistein, 3.68 and 3.40 mg per 100 g of edible nut, respectively, were evaluated. With the exception of isoflavones that appeared unmodified, the amounts of other bioactive molecules were remarkably reduced in the pistachio nut after roasting, and the total antioxidant activity decreased by about 60%. Collectively, our findings provide evidence that the Sicilian pistachio nut may be considered for its bioactive components and can effectively contribute to a healthy status

Gold nanoparticles obtained by ns-pulsed laser ablation in liquids (ns-PLAL) are arranged in the form of fractal clusters

Gold nanoparticles (AuNPs), synthesized by ns-pulsed laser ablation in liquid (ns-PLAL) in the absence of any capping agents, are potential model systems to study the interactions with biological structures unencumbered by interference from the presence of stabilizers and capping agents. However, several aspects of the physics behind these AuNPs solutions deserve a detailed investigation. The structure in solution of nsPLAL-synthesized AuNPs was investigated in solution by means of small-angle X-ray scattering (SAXS) and dynamic light scattering (DLS). Furthermore, the (dried) NPs have been examined using TEM. The analysis of the SAXS curve shows the presence of a large number of small aggregates with a fractal structure stabilized by strong long-range repulsive interactions. Fitting of the SAXS curve to a suitable “fractal model” allows the estimation of the features of the fractal including the fractal dimension d = 1.9. The latter allows to estimate the fraction of light scattered by fractals of different sizes and thus permits a fair comparison between the DLS and TEM data. Here, a stable abundant population of fractal clusters is reported reflecting a mechanism where primary AuNPs (size 7.6 nm) are forced to aggregate forming clusters during the collapse of the cavitation bubble. When these clusters are released in the aqueous phase, their large negative charge builds up repulsive interactions that prevent cluster-cluster aggregation imparting colloidal stability