Rolf David Vogt

Learn More
BACKGROUND Fish consumption is considered the primary pathway of methylmercury (MeHg) exposure for most people in the world. However, in the inland regions of China, most of the residents eat little fish, but they live in areas where a significant amount of mercury (Hg) is present in the environment. OBJECTIVES We assessed concentrations of total Hg and(More)
Data have been compiled from published sources on nitrogen (N) fluxes in precipitation, throughfall, and leaching from 69 forest ecosystems at 50 sites throughout China, to examine at a national level: (1) N input in precipitation and throughfall, (2) how precipitation N changes after the interaction with canopy, and (3) whether N leaching increases with(More)
As acidic water percolates through mineral soils, Al is mobilized and transported into streams and lakes. We evaluate the effect of increasing temperature (climate warming) on Al concentrations in four strongly acidified lakes in the Bohemian Forest, southwestern Czech Republic, over a 17-yr period (1984–2001). Pronounced decreases in atmospheric S and N(More)
Acid rain may cause soil acidification possibly leading to indirect forest damage. Assessment of acidification potential of atmospheric deposition is problematic where dry and occult deposition is significant. Furthermore, uncertainty is enhanced where a substantial part of the potential acidity is represented by deposition of ammonium (NH(4)(+)) since the(More)
The total level of phosphorus (P) and the distribution of P pools in the topsoil are significantly affected by the excessive application of mineral and organic fertilizers connected with intensive agriculture. This leads to an increased potential risk for P loss, and then contributes to freshwater eutrophication. Soil test P (STP), P sorption index (PSI)(More)
Receptor models are useful tools to identify sources of a specific pollutant and to estimate the quantitative contributions of each source based on environmental data. This paper reports on similarities and differences in results achieved when testing three receptor models for estimating the sources of polycyclic aromatic hydrocarbons (PAHs) in soils from(More)
Association of benzo[a]pyrene (BaP), pyrene, 3,3′,4,4′-tetrachlorobiphenyl (TCB) and 2,2′,4,4′-tetrabromo diphenyl ether (TBDE) with natural dissolved organic matter (DOM) was studied. The DOM samples were previously collected from natural waters at five Nordic sites during fall 1999 and spring 2000, isolated by the reverse osmosis method, and thoroughly(More)
Stream- and soilwater at the 18.7 ha pristineIngabekken catchment, on gneiss bedrock at Høylandet,have been studied for three years, including intensiveepisode studies in spring and autumn. The site mainlyconsists of blanket bogs which are typical for thesemarine west coast climates. Water drains through theblanket peats by means of two major flowpaths.(More)
Some immunomodulatory drugs have previously been shown to induce lysosomal storage of sulfated glycosaminoglycans (sGAG) in intact organisms and cultured cells. These compounds consist of a planary aromatic ring system and two symmetric side chains each carrying a protonizable nitrogen. The purpose of this study was to test a larger collection of such(More)