Search results for "iron [calorimeter]"
showing 10 items of 504 documents
Distinct microbial populations are tightly linked to the profile of dissolved iron in the methanic sediments of the Helgoland mud area, North Sea
2015
Iron reduction in subseafloor sulfate-depleted and methane-rich marine sediments is currently a subject of interest in subsurface geomicrobiology. While iron reduction and microorganisms involved have been well studied in marine surface sediments, little is known about microorganisms responsible for iron reduction in deep methanic sediments. Here, we used quantitative PCR-based 16S rRNA gene copy numbers and pyrosequencing-based relative abundances of bacteria and archaea to investigate covariance between distinct microbial populations and specific geochemical profiles in the top 5 m of sediment cores from the Helgoland mud area, North Sea. We found that gene copy numbers of bacteria and ar…
Holocene Spatiotemporal Redox Variations in the Southern Baltic Sea
2021
Low oxygen conditions in the modern Baltic Sea are exacerbated by human activities; however, anoxic conditions also prevailed naturally over the Holocene. Few studies have characterized the specific paleoredox conditions (manganous, ferruginous, euxinic) and their frequency in southern Baltic sub-basins during these ancient events. Here, we apply a suite of isotope systems (Fe, Mo, S) and associated elemental proxies (e.g., Fe speciation, Mn) to specifically define water column redox regimes through the Baltic Holocene in a sill-proximal to sill-distal transect (Lille Belt, Bornholm Basin, Landsort Deep) using samples collected during the Integrated Ocean Drilling Program Expedition 347. At…
Un enclos funéraire laténien dans la haute vallée de la Seine, à Meulson
2018
A Late Iron Age quadrangular burial ground has been identified in tne upper valley of the Seine river.This rescue archaeological diagnosis supervised by INRAP allows to inform a kind of monument forgotten by old research?
Il sistema di copertura del Teatro Politeama di Palermo
2012
In the project of the Politeama’s Theater in Palermo, the Architect Almeyda summarizes, in an expressive and model balance, the technological component and geometrical/spatial shape, providing optimal solutions to a structural and functional problems. Thanks to its typological approach, thanks to its technological aspects and, specifically, thanks to its size and its style, the work offers us some interesting reflections about the technical choices carried out for the construction. The Author, basing on some original Almeyda’s drawings, deepens the geometric and compositional system of the roof. The daring and complex construction carried out in iron and glass, modern and progressive in for…
Société, économie et territoires à l’âge du Fer dans le Centre-Est de la France : analyse des corpus céramiques des habitats du Ha D-LT A (VIIe-Ve av…
2012
Im Rahmen dieser Doktorarbeit wird das hallstattzeitliche Keramikgeschirr von der Mitte des VI. bis zum Ende des V. Jahrhunderts im östlichen Zentralfrankreich untersucht (Île-de-France, südliche Champagne, nördliche Bourgogne).Da Keramikbeigaben aus Gräbern weitgehend fehlen, konzentriert sich unsere Untersuchung auf Fundzusammenhänge aus Siedlungen. Dank des konsequenten Zugriffs der Präventivarchäologie hat sich in diesem Bereich in den letzten 30 Jahren die Dokumentation stark vermehrt. In unserer Arbeit wird die Keramik vom Mont Lassois (Vix, dép. Côte-d’Or) vorgelegt ; ihr steht die Siedlungskeramik der im Untersuchungsgebiet ausgewählten Fundstellen gegenüber. Innerhalb eines vorab e…
Potential myocardial iron content evaluation by magnetic resonance imaging in thalassemia major patients treated with Deferoxamine or Deferiprone dur…
2003
The purpose of this study was to evaluate if the variations of heart magnetic resonance imaging in beta-thalassemia major patients treated with Deferoxamine B mesylate (DF) or Deferiprone (L1) chelation therapy is a useful tool of the indirect myocardial iron content determination. For this reason, a prospective study was carried out. Seventy-two consecutive patients with beta-thalassemia major (35 treated with DF and 37 with L1) were studied. The main outcome results were laboratory parameters including determination of the liver iron concentration (LIC) and magnetic resonance imaging (MRI) of the heart and liver. The heart to muscle signal intensity ratios (HSIRs) were significantly incre…
Role of hypogonadism in development of bone alterations in thalassemic patients
2005
Although transfusions and chelation therapy have improved survival of patients afflicted with Thalassemia Major (TM), endocrine alterations are still common complications. Particularly, hypogonadism plays an important role in the aetiology of osteoporosis in these patients. It is clear that in most patients the gonadal failure is a consequence of a pituitary damage and that a hypogonadotropic hypogonadism occurs; nevertheless, also a gonadal damage because of iron deposition may be a further cause of hypogonadism. Prevalence of the pubertal failure ranges between 50 to 80% of the cases. In some studies ferritin levels have been correlated with hypogonadism, suggesting that improvement of ch…
Treatment of hepatitis C virus infection with direct-acting antiviral drugs is safe and effective in patients with hemoglobinopathies.
2017
CCDC 1573313: Experimental Crystal Structure Determination
2017
Related Article: Niklas Struch, Filip Topic, Gregor Schnakenburg, Kari Rissanen, Arne Lützen|2018|Inorg.Chem.|57|241|doi:10.1021/acs.inorgchem.7b02412
Mobility of Cultures and Knowledge Management in Contemporary Europe
2012
In the aftermath of the fall of the Iron Curtain, the European Union (EU) has included more and more new member states from Central and Eastern parts of the European continent. This enlargement process has increased the cultural diversity of the European community as new languages and minority groups have been subsumed into the EU. It is the purpose of this article to discuss the challenges that result from the EU's enlargement, together with the added intra-European mobility of cultures, that affect the national knowledge infrastructures. Based on recent social scientific scholarship on mobility and cultures, this article proposes that knowledge management in contemporary Europe is not onl…