Pyoderma gangrenosum is a rare neutrophilic disease of unknown origin that is associated with systemic diseases in 50% of cases. It is characterized by erythematous-violaceous nodular lesions that quickly progress to painful ulcers, with undermined edges, necrotic-hemorrhagic, varying in size and depth, located mainly in the lower limbs. Extracutaneous locations of pyoderma gangrenosum are rare...

Phase transformation and precipitation formation in mixed-phase clouds are usually associated with the Wegener–Bergeron–Findeisen (WBF) process in which ice crystals grow at the expense of liquid droplets. The evolution of mixed-phase clouds, however, is closely related to local thermodynamical conditions, and the WBF process is just one of three possible scenarios. The other two scenarios invo...

During the International GPS Service for Geodynamics (IGS) Epoch’92 campaign a special sub-campaign was organized to occupy all WEGENER/MEDLAS SLR sites with Trimble SST GPS receivers. This campaign, WEGENER/GPS-92, was initiated by the Institute for Applied Geodesy in cooperation with Delft University of Technology. The purpose was to observe the whole SLR network, for the first time, with GPS...

Fluorescence from atmospheric aerosol detected by a lidar indicates biogenic particles in the stratosphere F. Immler, D. Engelbart, and O. Schrems Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany German Weather Service, Meteorological Observatory Lindenberg, Am Observatorium 12, 15848 Lindenberg, Germany Received: 27 July 2004 – Accepted: 22...

Fluorescence photobleaching recovery techniques allow the accurate quantification of lateral and rotational motions of small numbers of specific molecules in complex systems. The technique was first applied to the study of translational diffusion in cell plasma membranes (Peters et al., 1974). This continues to be the principal area of application. More recently, it has been extended to the stu...

In the early 1920s, the continental displacement theory of Wegener, latitude studies of Koppen and Wegener, and Argand's ideas on mountain building led to the first mobilistic paleogeography. In the 1930s and 1940s, many factors caused its general abandonment. Mobilism was revived in the 1950s and 1960s by measurements of long-term displacement of crustal blocks relative to each other (tectonic...

1. Woywodt A, Haubitz M, Haller H, Matteson EL: Wegener’s granulomatosis. Lancet 367: 1362–1366, 2006 2. Klinger H: Grenzformen der Periarteriitis Nodosa. Frankf Z Pathol 42: 455–480, 1931 3. Wegener F: Ueber generalisierte septische Gefäßerkrankungen. Verh Deut Pathol Ges 29: 202–210, 1936 4. Wegener F: Ueber eine eigenartige rhinogene Granulomatose mit besonderer Beteiligung des Arteriensyste...

A 22-year-old man with a history of cocaine abuse from 2003 to 2005 developed recurrent bleeding of the nasal septum and a progressive cough and dyspnoea. He was admitted to the intensive care unit because of fulminant pneumonia, impaired renal function and progressive general deterioration. While hospitalized, he developed cutaneous vasculitis, thrombosis of the right subclavian and right jugu...