550 research outputs found
Er Sparekassernes Rentesatser ublu?
Er Sparekassernes Rentesatser ublu
X-ray fluorescence (XRF) fingerprinting of Palaeogene deposits in Denmark
In this study, we test if cost-efficient X-ray fluorescence (XRF) analyses can be used to fingerprint Palaeogene clay and marl deposits in Denmark. A total of 67 samples from key sites in Denmark have been analysed. Our preliminary results indicate that it is possible locally within 10â30 km to distinguish between most of the Palaeogene units, but on a regional scale across Denmark, the units are not unique, and this probably reflects variations in clay mineralogy, grain size and calcareous content. Accordingly, we suggest that a comprehensive reference database is now needed if the full potential of the method is to be utilised, and this will ultimately result in more reliable geological models
Water Solubilization Using Nonionic Surfactants from Renewable Sources in Microemulsion Systems
In this study the effect of temperature, NaCl and oils (hydrocarbons: C8âC16) on the formation and solubilization capacity of the systems of oil/monoacylglycerols (MAG):ethoxylated fatty alcohols (CEO20)/propylene glycol (PG)/water was investigated. The effects of the surfactant mixture on the phase behavior and the concentration of water or oil in the systems were studied at three temperatures (50, 55, 60 °C) and with varied NaCl solutions (0.5; 2; 11%). Electrical conductivity measurement, FTIR spectroscopy and the DSC method were applied to determine the structure and type of the microemulsions formed. The dimension of the microemulsion droplets was characterized by dynamic light scattering. It has been stated that the concentration of CEO20 has a strong influence on the shape and extent of the microemulsion areas. Addition of a nonionic surfactant to the mixture with MAG promotes an increase in the area of microemulsion formation in the phase diagrams, and these areas of isotropic region did not change considerably depending on the temperature, NaCl solution and oil type. It was found that, depending on the concentration of the surfactant mixture, it was possible to obtain U-type microemulsions with dispersed particles size distribution ranging from 25 to 50 nm and consisting of about 30â32% of the water phase in the systems. The conditions under which the microemulsion region was found (electrolyte and temperatureâinsensitive, comparatively low oil and surfactant concentration) could be highly useful in detergency
Holocene ice marginal fluctuations of the Qassimiut lobe in South Greenland
Knowledge about the Holocene evolution of the Greenland ice sheet (GrIS) is important to put the recent observations of ice loss into a longer-term perspective. In this study, we use six new threshold lake records supplemented with two existing lake records to reconstruct the Holocene ice marginal fluctuations of the Qassimiut lobe (QL) â one of the most dynamic parts of the GrIS in South Greenland. Times when the ice margin was close to present extent are characterized by clastic input from the glacier meltwater, whereas periods when the ice margin was behind its present day extent comprise organic-rich sediments. We find that the overall pattern suggests that the central part of the ice lobe in low-lying areas experienced the most prolonged ice retreat from ~9â0.4âcal. ka BP, whereas the more distal parts of the ice lobe at higher elevation re-advanced and remained close to the present extent during the Neoglacial between ~4.4 and 1.8âcal. ka BP. These results demonstrate that the QL was primarily driven by Holocene climate changes, but also emphasises the role of local topography on the ice marginal fluctuations
The quiet editor: Ivan VladislaviÄ and South African cultural production
This article examines the literary and sociological significance of Ivan VladislaviÄâs "double lifeâ (Lahire, 2010: n.p.) as both editor and writer. With reference to a number of his editorial roles as well as the joint projects he has worked on with writers and visual artists, the article considers how VladislaviÄâs work with others spreads symbolic value. Described by one of his clients as the âquiet editorâ, VladislaviÄ can be read as a new kind of author; what he terms âcreative editingâ (Steyn, 2012: n.p.) as a new kind of writing, through which more traditional models of authorship and literary production are thrown into question â less Bourdieuâs (1984) âfield of literary productionâ or Casanovaâs (2004: 82) âworld literary spaceâ, red in tooth and claw, amd more Howard Beckerâs âart worldâ: a convivial ânetwork of cooperating people, all of whose work is essential to the final outcomeâ (1982: 25)
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