Search results for "16"
showing 10 items of 8074 documents
La messa alla prova dopo il dictum della Consulta: indenne ma rivisitata e in attesa di nuove censure
2019
Con la sentenza n. 91 del 2018, la Consulta ha avuto modo di offrire una rivisitazione "ad ampio spettro" dell'istituto della sospensione del procedimento con messa alla prova, affrontandone diversi aspetti fondamentali. La pronuncia - pur esprimendosi in termini di inammissibilità o di infondatezza delle questioni sollevate - può essere considerata un importante spartiacque nell'elaborazione ermeneutica della fattispecie, risolvendo alcuni problemi interpretativi e, al contempo, ponendone in luce di nuovi.
Hyperosmolar therapy for acute brain injury: study protocol for an umbrella review of meta-analyses and an evidence mapping
2020
Introduction Acute brain injury is a challenging public health problem worldwide. Elevated intracranial pressure is a common complication after acute brain injury. Hyperosmolar therapy is one of the main therapeutic strategies for the management of intracranial hypertension. This study protocol outlines an umbrella review of meta-analyses which will investigate the benefits and harms of hyperosmolar therapy routinely used for the management of acute brain injury in the intensive care. Methods and analysis We will search PubMed/MEDLINE, EMBASE and the Cochrane Database of Systematic Reviews. We will include meta-analyses of primary research studies (eg, randomised controlled trials, observat…
Dinámica de la microbiota en niños, adolescentes y adultos
2022
La microbiota intestinal se implanta a lo largo del desarrollo del individuo y su composición y funciones difieren según la edad. Conocer los cambios que se producen en la microbiota intestinal a lo largo de la vida puede ayudar al diagnóstico, tratamiento y prevención de enfermedades relacionadas con alteraciones metabólicas e inmunitarias. Con este trabajo pretendemos contribuir a la comprensión del proceso de desarrollo de la microbiota intestinal, centrándonos en dos períodos que han recibido poca atención: los primeros años y la adolescencia. Hemos determinado la composición y la función de la microbiota a través de enfoques metagenómicos de genoma completo y basados en ARN ribosómic…
Phosphorus-Chalcogen Ring Expansion and Metal Coordination
2017
The reactivity of 4-membered (RPCh)2 rings (Ch = S, Se) that contain phosphorus in the +3 oxidation state is reported. These compounds undergo ring expansion to (RPCh)3 with the addition of a Lewis base. The 6-membered rings were found to be more stable than the 4-membered precursors, and the mechanism of their formation was investigated experimentally and by density functional theory calculations. The computational work identified two plausible mechanisms involving a phosphinidene chalcogenide intermediate, either as a free species or stabilized by a suitable base. Both the 4- and 6-membered rings were found to react with coinage metals, giving the same products: (RPCh)3 rings bound to the…
Testing the Dispersion of Nanoparticles in a Nanocomposite with an Ultra-Low Fill Content Using a Novel Non-Destructive Evaluation Technique
2022
A non-destructive evaluation (NDE) technique capable of testing the dispersion of nanoparticles in a nanocomposite would be of great use to the industry to check the quality of the products made and to ensure compliance with their specifications. Very few NDE techniques found in the literature can evaluate the level of dispersion of the nanoparticles in the whole nanocomposite. Here, a recently developed NDE technique based on pulsed phase thermography (PPT) in transmission mode was used to assess the particle dispersion in ultra-low, less than 0.05 wt%, Ag enriched polymeric based nanocomposite manufactured with an innovative nano-coating fragmentation technique. The phasegrams obtained wi…
Hybrid nanocomposites with ultra-low filling content by nano-coating fragmentation
2021
In the current study, a new technique for the manufacturing of polymer nanocomposites (PNCs) with ultra-low filling content (<0.05 wt%) is presented. Specifically, this method has been validated through the production of polypropylene (PP) nanocomposites with Ag nanoparticles. The presented method first consisted in a metal nano-film deposition on PP pellet substrates by a physical vapor deposition (PVD) sputtering equipment. Subsequently, a percentage of the coated pellet was mixed to uncoated ones via an injection molding machine to produce the PNC in a single step. Different mixing percentages of coated PP pellet to the uncoated ones were studied. As a result, the fragmentation of the…
Scanning Tunneling Spectroscope Use in Electrocatalysis Testing
2010
Published version of an article from the journal: Materials (1996-1944). Also available from publisher: http://dx.doi.org/10.3390/ma3063675 The relationship between the electrocatalytic properties of an electrode and its ability to transfer electrons between the electrode and a metallic tip in a scanning tunneling microscope (STM) is investigated. The alkaline oxygen evolution reaction (OER) was used as a test reaction with four different metallic glasses, Ni78Si8B14, Ni70Mo20Si5B5, Ni58Co20Si10B12, and Ni25Co50Si15B10, as electrodes. The electrocatalytic properties of the electrodes were determined. The electrode surfaces were then investigated with an STM. A clear relationship between the…
From 1D coordination polymers to Metal Organic Frameworks by the use of 2-pyridyl oximes.
2020
The synthesis and characterization of coordination polymers and metal&ndash
Ar metformīna lietošanu asociētas izmaiņas cilvēka zarnu mikrobioma sastāvā un DNS metilēšanas profilos
2017
Metformīns ir pirmās izvēles medikaments 2. tipa cukura diabēta ārstēšanā. Tam raksturīga variabilitāte terapijas efektivitātē un biežas blaknes. Medikamenta iedarbību var ietekmēt tādi faktori kā mijiedarbība ar zarnu mikrobiomu un gēnu ekspresijas regulācija DNS metilēšanas līmenī. Maģistra darba mērķis bija noskaidrot, kādas izmaiņas metformīns ierosina cilvēka zarnu mikrobioma kompozīcijā un leikocītu metilēšanas profilā. Darbā tika veikta 16S rRNS amplikonu analīze 18 metformīna lietotāju fēču paraugos un DNS metilēšanas novērtēšana 12 indivīdiem. Metformīna ierosinātas izmaiņas gan zarnu mikrobiomā, gan metilēšanas profilā tika novērotas jau pirmo 24 stundu laikā, daļēji skaidrojot ie…
Taksonomiskās izmaiņas zarnu mikrobioma sastāvā, lietojot metformīnu, pacientiem ar 2.tipa cukura diabētu
2018
Metformīns ir medikaments, kurš tiek plaši izmantots 2.tipa cukura diabēta (T2D) ārstēšanā un kura lietošanas laikā būtiski izmainās cilvēka zarnu mikrobioma baktēriju daudzveidība. Bakalaura darba mērķis bija raksturot ar metformīna īstermiņa terapiju asociētās taksonomiskās kompozīcijas izmaiņas zarnu mikrobiomā jaundiagnosticētiem T2D pacientiem. No 23 iesaistīto T2D pacientu fēču paraugiem tikai izdalīta mikrobiālā DNS, veikta mazās ribosomālās subvienības gēna (16S rRNS) V3 reģiona taksonomiskās kompozīcijas analīze ar lielapjoma paralēlo sekvenēšanu. Rezultātā novērota statistiski būtiskas atšķirības β-daudzveidībā un fenotipa specifiskas izmaiņu tendences baktēriju iekšējā daudzveidī…