Gustav Rose (1798-1873) begleitete Alexander von Humboldt auf seiner Russlandreise und stand bis zu Humboldts Tod persönlich und postalisch zum ihm in Kontakt. Die Edition des vorliegenden Briefs zielt darauf ab, die Bedeutung der Person Gustav Rose in ihrer Beziehung zu Alexander von Humboldt und ihrem Einfluss auf den mineralogisch-geologischen Teil des Kosmos zu beleuchten und dem Leser dieses interessante historische Dokument zugänglich zu machen.

The aim of this study was to develop a one-step synthesis of gold nanotriangles (NTs) in the presence of mixed phospholipid vesicles followed by a separation process to isolate purified NTs. Negatively charged vesicles containing AOT and phospholipids, in the absence and presence of additional reducing agents (polyampholytes, polyanions or low molecular weight compounds), were used as a template phase to form anisotropic gold nanoparticles. Upon addition of the gold chloride solution, the nucleation process is initiated and both types of particles, i.e., isotropic spherical and anisotropic gold nanotriangles, are formed simultaneously. As it was not possible to produce monodisperse nanotriangles with such a one-step procedure, the anisotropic nanoparticles needed to be separated from the spherical ones. Therefore, a new type of separation procedure using combined polyelectrolyte/micelle depletion flocculation was successfully applied. As a result of the different purification steps, a green colored aqueous dispersion was obtained containing highly purified, well-defined negatively charged flat nanocrystals with a platelet thickness of 10 nm and an edge length of about 175 nm. The NTs produce promising results in surface-enhanced Raman scattering.

This article examines geographical field research in Albania and Montenegro under Austro-Hungarian occupation, which lasted from 1916 to 1918. It focusses on one of the most important German-speaking geographers of the early 20 th century, Eugen Oberhummer (1859–1944), a pupil of Friedrich Ratzel, the founder of German geo-politics. In 1917 and 1918, Oberhummer went on two expeditions to Montenegro and Albania during the First World War. He already had travelled in four continents and vaguely knew the Western Balkans from an expedition in 1907. It will be argued that the actual situation in Albania and Montenegro did not alter, but did rather reinforce Oberhummer’s attitudes and opinions on the ‘other’ he encountered. Thus, the two war expeditions – Oberhummer primarily met high-ranking Austro-Hungarian officials and only few locals – confirmed his expectations basing on his ‘Ratzelian’ theoretical conceptions. It will further be argued that – in contrast to the much younger and less experienced ‘scholars-at-arms’ of the expedition of 1916 – war and violence were of secondary relevance for the well-travelled and renowned professor of geography in his late 50s. Neither in Oberhummer’s articles nor in his diaries the war and the occupation of Albania and Montenegro made up an important part. In Oberhummer’s ‘Ratzelian’ view, humans could not change or over-come the basic features of geography, as humans were clearly subordinated to the elemental forces of geography. People, over generations, adapted to geography, not the other way round. The on-going First World War was an opportunity for Oberhummer to travel to Albania and Montenegro, but the guerrilla warfare in large parts of Montenegro, the violence against the civilian population, and the fighting at the Albanian front were of secondary relevance and interest for him. Nevertheless, what Oberhummer observed offers great insights into the Austro-Hungarian occupation of Montenegro and Albania from the perspective of a renowned and – given the general circumstances – pleasantly relaxed Ratzelian geographer at the height of his academic career.

Rezension von zwei Büchern des Rabbiners Shimon Gershon Rosenberg

Eberhard Knobloch Alejandro Cheirif Wolosky Luiz Estevam O. Fernandes Dominik Erdmann/Christian Thomas Konstantin Treuber Anja Werner Peter Honigmann