Search results for "element"
showing 10 items of 13601 documents
The cycle of major and trace elements in a volcanic environment
2010
Atmospheric Deposition Of Volcanogenic Major And Trace Elements On Mt. Etna (Italy)
2009
There are a variety of natural and anthropogenic sources of trace elements into the environment, and human activity has drastically changed the biogeochemical cycles and balance of several elements. In the last twenty years many efforts have been spent by the scientific community to better outline the levels of pollutants in the environment on a long-term basis, and to evaluate global large-scale changes. It is generally accepted that volcanic emissions are an important source of gases and particles to the atmosphere, contributing significantly to the natural geochemical cycles of all elements (Nriagu, 1989; Hinkley et al., 1999; Oppenheimer, 2003). Many studies have been carried out on the…
Trace elements in thermomineral waters in Greece
2020
Trace elements have a fundamental role in natural and anthropogenic systems. In waters, they present a great variability of concentrations that mostly depends on the degree of gas-water-rock interactions and geochemical conditions such as pH, temperature, redox and/or exchange reactions, etc. Even though, they are present in very low contents in host-rocks, elevated concentrations in ground or surface waters may have a hazardous impact on human health and thus, it is important to both quantify and understand their behavior in natural systems. Here we present the results of about 300 cold and thermal mineral waters collected along the entire Hellenic territory. Physicochemical parameters (te…
A literature review and new data of trace metals fluxes from worldwide active volcanoes
2012
Crystal structure of trans-dichlorido(4-nitroaniline-κN 1)(piperidine-κN)platinum(II)
2015
The packing of the title compound features N—H⋯Cl hydrogen bonds and π–π stacking interactions, which form one-dimensional chains of molecules parallel to [001] further linked via N—H⋯O interactions.
3D Printing and Computational Modeling for the Evaluation of LVOT obstruction in Transcatheter Mitral Valve Replacement
2022
Transcatheter mitral valve replacement (TMVR) is an emerging alternative treatment for those patients not qualified for surgery. However, TMVR can determine an obstruction of the left ventricular outflow tract (namely, neo-LVOT) induced by the transcatheter heart valve (THV) displacing the native mitral valve leaflet towards the myocardial wall. This condition can lead to haemodynamic impairment and ultimately patient death. We sought to predict the neo-LVOT obstruction by first developing patient-specific simulations of the THV deployment and then comparing predictions with post-TMVR diagnostic images and 3D printed human models. Using pre-TMVR computed-tomography (CT) imaging, patient-spe…
Pārrobežu ceļu satiksmes negadījumiem piemērojamais likums
2017
Bakalaura darba tēma ir „Pārrobežu ceļu satiksmes negadījumos piemērojamais likums”. Bakalaura darba mērķis ir noskaidrot, kādos gadījumos tiek piemērota 1971. gada 4. maija konvencija „Konvencija par ceļu satiksmes negadījumiem piemērojamo likumu” un Eiropas Parlamenta un Padomes Regula Nr. 864/2007, un kā šie divi starptautiskie normatīvie akti mijiedarbojas un atšķiras. Kā arī, izpētīt, vai tos savā praksē pielieto apdrošinātāji. Pētāmās problēmas galvenais iemesls - apdrošinātāji, nosakot atbildību un aprēķinot apdrošināšanas atlīdzību par zaudējumiem, kas cietušajām personām radušies ceļu satiksmes negadījuma rezultātā, piemēro tās valsts likumu, kurā tas noticis, nevis meklē piemēroja…
Computational prediction of the Helitron-N2 (HeN2) transposable element in the strim1 locus of the Paracentrotus lividus genome
2011
Transposons constitute a significant component of the eukaryotic genome. Among others, Helitrons represent a novel major class of eukaryotic transposons, and are fundamentally different from classical ones in terms of their structure and mechanism of transposition [1]. In particular, Helitrons constitute ~1% of the sea urchin genome [2]. By a in silico approach focused on the genome of the Mediterranean sea urchin Paracentrotus lividus, we have predicted regions of high sequence identity to a Helitron-N2 (HeN2) element in the strim1 locus. Of interest, HeN2 sequences lies within the 5’ non coding region of the strim1a and strim1b genes, spanning from -105 to -2255 (the start codon ATG of st…
Double copies of blaKPC-3::Tn4401a on an IncX3 plasmid in Klebsiella pneumoniae successful clone ST512 from Italy
2015
ABSTRACT A carbapenem-resistant sequence type 512 (ST512) Klebsiella pneumoniae carbapenemase 3 (KPC-3)-producing K. pneumoniae strain showing a novel variant plasmid content was isolated in Palermo, Italy, in 2014. ST512 is a worldwide successful clone associated with the spread of bla KPC genes located on the IncFIIk pKpQIL plasmid. In our ST512 strain, the bla KPC-3 gene was unusually located on an IncX3 plasmid, whose complete sequence was determined. Two copies of bla KPC-3 ::Tn 4401a caused by intramolecular transposition events were detected in the plasmid.
The prolyl-isomerase PIN1 is essential for nuclear Lamin-B structure and function and protects heterochromatin under mechanical stress.
2021
Summary: Chromatin organization plays a crucial role in tissue homeostasis. Heterochromatin relaxation and consequent unscheduled mobilization of transposable elements (TEs) are emerging as key contributors of aging and aging-related pathologies, including Alzheimer’s disease (AD) and cancer. However, the mechanisms governing heterochromatin maintenance or its relaxation in pathological conditions remain poorly understood. Here we show that PIN1, the only phosphorylation-specific cis/trans prolyl isomerase, whose loss is associated with premature aging and AD, is essential to preserve heterochromatin. We demonstrate that this PIN1 function is conserved from Drosophila to humans and prevents…