Search results for "DATES"
showing 10 items of 80 documents
First results on dark matter annihilation in the Sun using the ANTARES neutrino telescope
2013
A search for high-energy neutrinos coming from the direction of the Sun has been performed using the data recorded by the ANTARES neutrino telescope during 2007 and 2008. The neutrino selection criteria have been chosen to maximize the selection of possible signals produced by the self-annihilation of weakly interacting massive particles accumulated in the centre of the Sun with respect to the atmospheric background. After data unblinding, the number of neutrinos observed towards the Sun was found to be compatible with background expectations. The 90% CL upper limits in terms of spin-dependent and spin-independent WIMP-proton cross-sections are derived and compared to predictions of two sup…
Search for Dark Matter Annihilations in the Sun with the 79-String IceCube Detector
2012
We have performed a search for muon neutrinos from dark matter annihilation in the center of the Sun with the 79-string configuration of the IceCube neutrino telescope. For the first time, the DeepCore sub-array is included in the analysis, lowering the energy threshold and extending the search to the austral summer. The 317 days of data collected between June 2010 and May 2011 are consistent with the expected background from atmospheric muons and neutrinos. Upper limits are therefore set on the dark matter annihilation rate, with conversions to limits on spin-dependent and spin-independent WIMP-proton cross-sections for WIMP masses in the range 20 - 5000 GeV. These are the most stringent s…
A portable NMR sensor to measure dynamic changes in the amount of water in living stems or fruit and its potential to measure sap flow.
2014
Nuclear magnetic resonance (NMR) and NMR imaging (magnetic resonance imaging) offer the possibility to quantitatively and non-invasively measure the presence and movement of water. Unfortunately, traditional NMR hardware is expensive, poorly suited for plants, and because of its bulk and complexity, not suitable for use in the field. But does it need to be? We here explore how novel, small-scale portable NMR devices can be used as a flow sensor to directly measure xylem sap flow in a poplar tree (Populus nigra L.), or in a dendrometer-like fashion to measure dynamic changes in the absolute water content of fruit or stems. For the latter purpose we monitored the diurnal pattern of growth, ex…
Tyrosine-phosphorylation-dependent and Rho-protein-mediated control of cellular phosphatidylinositol 4,5-bisphosphate levels
1998
The polyphosphoinositide PtdIns(4,5)P2, best known as a substrate for phospholipase C isozymes, has recently been recognized to be involved in a variety of other cellular processes. The aim of this study was to examine whether the cellular levels of this versatile phospholipid are controlled by tyrosine phosphorylation. The studies were performed in human embryonic kidney (HEK)-293 cells stably expressing the M3 muscarinic acetylcholine receptor. Inhibition of tyrosine phosphatases by pervanadate induced an up-to-approx.-2.5-fold increase in the total cellular level of PtdIns(4,5)P2, which was both time- and concentration-dependent. In contrast, the tyrosine kinase inhibitors, genistein and…
Cytokines and growth factors in wound drainage fluid from patients undergoing incisional hernia repair.
2006
Knowing the dynamics of growth factor and cytokine secretion within the site of a surgical operation is important, as they play a crucial role in the pathophysiology of wound healing and are a target for modifying the repair response. The aim of this study was to evaluate the production of several cytokines and growth factors in the drainage wound fluid from patients undergoing incisional hernia repair: namely, interleukin (IL)-6, IL-10, IL-1alpha, IL-1 ra, interferon-gamma, vascular endothelial growth factors and basic fibroblast growth factor. Ten female patients with abdominal midline incisional hernia undergoing surgical repair were included in this study. In all cases, a closed-suction…
Proces selekcji kandydatów partii politycznych w wyborach Prezydenta RP – motywacje, dylematy, strategie
2022
Wybory prezydenckie pomimo dużego stopnia spersonalizowania, stanowią ważną przestrzeń rywalizacji międzypartyjnej. Doświadczenia polskich elekcji prezydenckich pokazują, że są one zdominowane przez kandydatów partyjnych. Podstawowym celem niniejszego artykułu, jest ukazanie procesu selekcji kandydatów partii politycznych na urząd Prezydenta RP, jako jednego z kontekstów wyborów prezydenckich w Polsce. Istotnym punktem rozważań jest odniesienie wskazanego procesu do aktywności przywódców partyjnych w tym zakresie, a dokładnie zauważalnej tendencji do rezygnacji z kandydowania. Trend ten wiąże się z wykorzystywaniem przez partie polityczne tzw. surogatów, czyli kandydatów zastępczych. Porusz…
Iodine determination in food samples using inductively coupled plasma isotope dilution mass spectrometry.
1998
Two different sample treatment methods are used in connection with inductively coupled plasma isotope dilution mass spectrometry for accurate and precise determinations of iodine traces in food samples. 129I-enriched iodate is applied as a spike compound for the isotope dilution step. Extraction of iodine by tetramethylammonium hydroxide (TMAH) solution at high temperatures in a closed vessel is one of the sample treatment methods. The other one is a complete decomposition of the sample with a mixture of perchloric acid and nitric acid using microwave assistance. By analyzing different certified reference materials (three milk powders with different iodine levels, BCR CRM 63, 150, and 151; …
Terrorismo e sistema penale: realtà, prospettive, limiti - Presentazione del corso
2017
Il testo riproduce la relazione introduttiva al VII Corso “Giuliano Vassalli” per dottorandi, svoltosi a Noto nel 2016, integrandola con i riferimenti alla struttura dell’inziativa e ai temi a rontati nel corso dei lavori e poi oggetto dei contributi di seguito pubblicati.
Ancora sulle "esplosive palatali" nelle inchieste dell'Atlante Linguistico del Mediterraneo (ALM): i punti albanesi
2021
Tra i «Problemi redazionali» emersi in fase di controllo e organizzazione dei materiali giunti dalla campagna di rilevamenti dell’Atlante Linguistico del Mediterraneo (ALM), Berruto (1971-1973) rileva la proliferazione e l’eterogeneità di alcune scelte grafemiche operate da diversi raccoglitori che, impegnati in una trascrizione più o meno puntuale delle risposte ottenute, avevano interpretato e risolto variamente alcune delle indicazioni previste nel sistema di trascrizione fonetica che accompagnava il Questionario. Particolarmente complesso era emerso il quadro relativo alla trascrizione di alcune consonanti del settore “palatale”, per le quali i grafemi (e i foni a essi corrispondenti) p…
La mobilità volontaria nel Pubblico Impiego: margini di discrezionalità dell'Amministrazione di destinazione
2022
Il contributo, a partire da una recente pronuncia del Tribunale di Catanzaro, affronta la questione dei margini di discrezionalità della pubblica amministrazione reclutante nei procedimenti di mobilità individuale volontaria ex art. 30 d.lgs. n. 165/2001, con specifico riferimento alla fase di valutazione delle competenze professionali dei candidati. Ciò offre l’occasione per soffermarsi sulla natura dell’istituto, anche alla luce dei più recenti approdi legislativi in materia.