sj-vid-2-arr-10.1177 2058460118778068 -Supplemental material for Variable size of aortic subvalvular pseudoaneurysm

<p>Supplemental material, sj-vid-2-arr-10.1177 2058460118778068 for Variable size of aortic subvalvular pseudoaneurysm by Anders Svensson, Kerstin Cederlund, Torkel B Brismar and Raquel Themudo in Acta Radiologica Open</p

sj-vid-1-arr-10.1177 2058460118778068 -Supplemental material for Variable size of aortic subvalvular pseudoaneurysm

<p>Supplemental material, sj-vid-1-arr-10.1177 2058460118778068 for Variable size of aortic subvalvular pseudoaneurysm by Anders Svensson, Kerstin Cederlund, Torkel B Brismar and Raquel Themudo in Acta Radiologica Open</p

Continuous Flow Analysis Method for Determination of Dissolved Reactive Phosphorus in Ice Cores

Phosphorus (P) is an essential macronutrient for all living organisms. Phosphorus is often present in nature as the soluble phosphate ion PO₄^3– and has biological, terrestrial, and marine emission sources. Thus PO₄^3– detected in ice cores has the potential to be an important tracer for biological activity in the past. In this study a continuous and highly sensitive absorption method for detection of dissolved reactive phosphorus (DRP) in ice cores has been developed using a molybdate reagent and a 2-m liquid waveguide capillary cell (LWCC). DRP is the soluble form of the nutrient phosphorus, which reacts with molybdate. The method was optimized to meet the low concentrations of DRP in Greenland ice, with a depth resolution of approximately 2 cm and an analytical uncertainty of 1.1 nM (0.1 ppb) PO₄^3–. The method has been applied to segments of a shallow firn core from Northeast Greenland, indicating a mean concentration level of 2.74 nM (0.26 ppb) PO₄^3– for the period 1930–2005 with a standard deviation of 1.37 nM (0.13 ppb) PO₄^3– and values reaching as high as 10.52 nM (1 ppb) PO₄^3–. Similar levels were detected for the period 1771–1823. Based on impurity abundances, dust and biogenic particles were found to be the most likely sources of DRP deposited in Northeast Greenland

A Chinese Imprint in Insoluble Pollutants Recently Deposited in Central Greenland As Indicated by Lead Isotopes

A unique ∼10 year record of the lead isotopic composition of airborne insoluble particulate matter deposited in central Greenland was extracted from recent snow layers at NorthGRIP (75.1°N, 042.3°W; elevation 2,959 m), spanning the years 1989–2001. Comparison with lead isotopic signatures of both natural and anthropogenic northern hemisphere (NH) aerosol sources shows that human activities must have accounted for most of the insoluble lead deposited on Greenland during the late 1990s, exceeding by far the natural contribution from large Asian mineral dust inputs. Lead isotopes imply predominance with time of European/Canadian sources over U.S.-derived lead, with an admixed signature typical of Chinese anthropogenic lead sources. The relative contribution of the latter shows a marked seasonal increase during spring. Our record also suggests that China’s weight in the overall supply of insoluble pollutants deposited on Greenland was growing over the past decade of the 20th century