Search results for " Steri"
showing 10 items of 49 documents
Recent Borexino results and perspectives of the SOX measurement
2017
International audience; Borexino is a liquid scintillator detector sited underground in the Laboratori Nazionali del Gran Sasso (Italy). Its physics program, until the end of this year, is focussed on the study of solar neutrinos, in particular from the Beryllium, pp, pep and CNO fusion reactions. Knowing the reaction chains in the sun provides insights towards physics disciplines such as astrophysics (star physics, star formation, etc.), astroparticle and particle physics. Phase II started in 2011 and its aim is to improve the phase I results, in particular the measurements of the neutrino fluxes from the pep and CNO processes. By the end of this year, data taking from the sun will be over…
La vasectomia a sostegno del piacere: analisi casistica e considerazioni medico legali
2012
In Italy, the resort to vasectomy, surgery adapted to determine an irreversible alteration of the physical state of an individual, resulting in the loss of the ability to procreate, is somewhat reduced compared to the others European countries, even though legitimate, it carries the disadvantage of the absence of a clear and univocal legislation concerning surgical sterilization. Despite, in recent years there has been a change in the assessment of such surgery. Nevertheless, is relevant that in the Italian legal system still lacks a regulatory of such medical-surgery activities, although several bills have been submitted to the competent parliamentary bodies. The attitude of indifference t…
SOX: search for short baseline neutrino oscillations with Borexino
2015
International audience; The Borexino detector has convincingly shown its outstanding performances in the low energy regime through its accomplishments in the observation and study of the solar and geo neutrinos. It is then an ideal tool to perform a state of the art source-based experiment for testing the longstanding hypothesis of a fourth sterile neutrino with ~ eV(2) mass, as suggested by several anomalies accumulated over the past three decades in source, reactor, and accelerator-based experiments. The SOX project aims at successively deploying two intense radioactive sources, made of Cerium (antineutrino) and Chromium (neutrino), respectively, in a dedicated pit located beneath the det…
EV-Scale Sterile Neutrino Search Using Eight Years of Atmospheric Muon Neutrino Data from the IceCube Neutrino Observatory
2020
Physical review letters 125(14), 141801 (1-11) (2020). doi:10.1103/PhysRevLett.125.141801
Short distance neutrino oscillations with Borexino
2014
International audience; The Borexino detector has convincingly shown its outstanding performances in the low energy, sub-MeV regime through its unprecedented accomplishments in the solar and geo-neutrinos detection. These performances make it the ideal tool to accomplish a state-of-the-art experiment able to test unambiguously the long-standing issue of the existence of a sterile neutrino, as suggested by the several anomalous results accumulated over the past two decades, i.e. the outputs of the LSND and Miniboone experiments, the results of the source calibration of the two Gallium solar neutrino experiments, and the recently hinted reactor anomaly. The SOX project will exploit two source…
L'intervento di Roberto Calandra per lo Steri palermitano tra conservazione e innovazione
2015
Il presente saggio mira ad illustrare l’intervento di restauro, curato da un’équipe di lavoro coordinata da Roberto Calandra, del trecentesco Palazzo Chiaramonte, da adibire a sede del rettorato dell’Università di Palermo. Il lavoro offre un significativo contributo alla maturazione della cultura architettonica negli anni tra il 1972 e il 1998 (durata del cantiere) ponendosi in una posizione di equilibrio tra le asserzioni della Carta del restauro del 1972, di matrice brandiana, e le nuove pulsioni di una conservazione integrale.
Aseptic Production vs. Terminal Sterilization
2000
The safety of substance use in intraocular surgery ideally requires the absence of all biologically-active components capable of causing an inflammatory reaction. Substance purity is achieved with isolation and cleansing methods (e.g., of the polysaccharide), which remove any biological component with infective potential. The methods of production for polysaccharide isolation should remove biological agents, regardless of its origin. Hyaluronic acid is isolated either from rooster combs or biological fermentation. Use of this substance showed the development of postoperative intraocular inflammatory reactions resulting from contaminations from both sources. OVD should have low endotoxin val…
Steam sterilization processes affect the stability of clinical thermometers: Thermistor and prototypal FBG probe comparison
2020
Abstract Temperature is one of the most frequently measured physical quantities in clinical environment and a good biomarker of illness. The need for reusable probes, which have to be sterilized to prevent infections, requires the metrological qualification of thermometer probes in response to ageing effects induced by several sterilization processes. In this study, we investigated the effect of repeated sterilizations on both a commonly-used autoclavable thermistor probe and a prototypal Fiber Bragg Gratings (FBG) probe for temperature measurements. Findings highlighted a greater reliability of the proposed FBG probe than the commercial thermistor. Specifically, the FBG probe was able to w…
Sterilization of macroscopic poly(l-lactic acid) porous scaffolds withdense carbon dioxide: Investigation of the spatial penetration of thetreatment …
2016
Abstract In this work the sterilization with dense carbon dioxide of poly( l -lactic acid) (PLLA) porous scaffolds intended for tissue engineering applications was investigated with the main objective of confirming the three-dimensional efficacy of the treatment and of analysing the scaffold properties after CO2 treatment. For this purpose the scaffold was contaminated with a conventional bacterium (Escherichia coli) and with spores (Streptomyces coelicolor), a species more fascinating and difficult to inactivate. Contamination was performed in such a way to soak the whole matrix with bacteria and spores. The effect of pressure and treatment time on the efficacy of the sterilization was eva…
Inactivation of dried spores of Bacillus subtilis 168 by a treatment combining high temperature and pressure
2019
International audience; Specific treatments combining high temperatures of up to 150 °C and moderate pressure of up to 0.6 MPa have been applied to Bacillus subtilis 168 spores conditioned at different aw levels (between 0.10 and 0.70) corresponding to different residual water contents within the spore core. The spores were treated as a dry powder in a pressurized nitrogen environment or in water/glycerol solutions.These thermodynamic conditions were intended to prevent any water evaporation from the spore core during time/temperature treatments.Our results clearly show that retaining liquid water in the core by applying pressure during the treatment resulted in greater spore destruction (b…