Jakob Wernicke

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We performed a cumulative risk assessment for people living in a hypothetical urban environment, called Urbania. The main aims of the study were to demonstrate how a cumulative risk assessment for a middle-sized European city can be performed and to identify the bottlenecks in terms of data availability and knowledge gaps. The assessment focused on five air(More)
The subject of the present study is to find the best way of making a simulation model for the exposure assessment of mobile individuals. For that purpose we consider and apply several very different approaches to model movement patterns in a more or less random way and compare them in terms of the exposure resulting for the individuals. The models combine(More)
Two industrially pre-prepared staining techniques and their suitability for the morphological differentiation of human spermatozoa are compared with each other using 227 ejaculations. One method uses a dye-coated microscope slide and the other method uses a dye-coated staining foil. Both methods are suitable for morphological differentiation. The advantage(More)
The orientations in the tangential plane, i.e., parallel to the pial surface, of dendrites and axons in several functionally different areas of the rat neocortex were investigated. Using a large data base of over 30,000 measurements and the t-test and chi 2 test for significance, we found an overall preference of both dendrites and axons for the(More)
A profound consideration of stable oxygen isotope source water origins is a precondition for an unambiguous palaeoenvironmental interpretation of terrestrial δ 18O archives. To stress the influence of air mass origins on widely used δ 18O tree-ring chronologies, we conducted correlation analyses between six annually resolved δ 18O tree-ring cellulose(More)
We present an 800-year δ 18 O chronology from the eastern part of the Tibetan Plateau (TP). The chronology dates back to AD 1193 and was sampled in AD 1996 from living Juniperus tibetica trees. This first long-term tree-ring-based δ 18 O chronology for eastern Tibet provides a reliable archive for hydroclimatic reconstructions. Highly significant(More)
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