168 research outputs found
Goethe as critic
Tradução de Magali Moura do texto original em alemĂŁo âGoethe als Kritikerâ
Historisk topik
I det fĂžlgende vil vi beskĂŠftige os med poesiens retoriske temaer. Dermed mener jeg ikke poesiens genstandsomrĂ„de (fx krigshandlinger, fyrstelovprisning, sĂŠdelĂŠre, natur- og kunstbeskrivelse, hyrdeliv, kĂŠrlighed) og heller ikke mytiske, historiske eller religiĂžse motiver (Troja, Alexander, visioner om det hinsidige). Snarere handler det om de retoriske skemaer fra antikken, som kaldes topoi eller loci eller loci communes, det som man i en nedsĂŠttende undertone gengiver som GemeinplĂ€tze [klichĂ©er] pĂ„ tysk. PĂ„ ĂŠldre tysk siger man mere rigtigt: Gemeinort [almensted]. Hver plads er et sted, men ikke hvert sted er en plads! Men hvad er et âretorisk stedâ? Hvordan skal man forstĂ„ denne metafor? Det skal man fra den antikke retoriks historie
Size-resolved online chemical analysis of nanoaerosol particles: a thermal desorption differential mobility analyzer coupled to a chemical ionization time-of-flight mass spectrometer
A new method for size-resolved chemical analysis of nucleation
mode aerosol particles (size range from ââŒâ10 to ââŒâ30 nm) is presented. The Thermal Desorption Differential Mobility Analyzer
(TD-DMA) uses an online, discontinuous principle. The particles are charged,
a specific size is selected by differential mobility analysis and they are
collected on a filament by electrostatic precipitation. Subsequently, the
sampled mass is evaporated in a clean carrier gas and analyzed by a chemical
ionization mass spectrometer. Gas-phase measurements are performed with the
same mass spectrometer during the sampling of particles. The characterization
shows reproducible results, with a particle size resolution of 1.19 and the
transmission efficiency for 15 nm particles being slightly above 50 %. The
signal from the evaporation of a test substance can be detected starting from
0.01 ng and shows a linear response in the mass spectrometer. Instrument
operation in the range of pg mâ3 is demonstrated by an example
measurement of 15 nm particles produced by nucleation from dimethylamine,
sulfuric acid and water.</p
Peloponnesos: eine historich-geographishe Beschreibung der Halbinsel [Mit karten und eingedruckten Holzschnitten].
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