Lehr-Moodle der Universität Duisburg-Essen

Das Ringpraktikum Angewandte Medizintechnik ist eine Pflichtveranstaltung für Studierende des Bachelor-Studiengangs Medizintechnik im vierten Semester. Den Einschreibeschlüssel für den Moodlekurs erhalten Sie während der Einführungsveranstaltung.

Die ausgewählten Versuche werden von unterschiedlichen Fachgebieten angeboten und geben einen Überblick über die Bereiche MRT und Grundprinzipien des Röntgens, Biosignalverarbeitung, medizinische Bilddaten, Elektromyographie und optische Signal- und Energieübertragung für Implantate. Ergänzt werden die Versuche durch zwei Exkursionen zum Erwin L. Hahn Institut for Magnetic Resonance und in das Living Lab, Bereich Hospital Engineering und Health Care des Fraunhofer-inHaus-Zentrums.

Weitere Informationen erhalten Sie hier.

Course Description: As an academic discipline American studies today faces a world in which the specific cold-war logic of the American Century has ceased to exist in many of the arenas in which it used to be particularly effective: public diplomacy, popular culture, collective memory, urbanity. Whereas generations of scholars in our field took it for granted that American culture and American goods had a major, if conflicted role to play in the global campaign for democratization, this straightforward political instrumentalization of (cultural) production is today much less certain. When approaching American literature, culture, media, history, and politics as European and U.S. American academics in these times of massive right-wing recalibration, if not outright revolution, we believe that it is useful to better “ground” our scholarly analyses in the contexts in which they will be taking effect. This Spring Academy will take place in the shape of an excursion across the Dutch-German border, most likely in the month of March and it will include the participation of American and AURORA University Alliance scholars and students. It will be guided by a critical inquiry into Sustainable Development Goal 16 on Peace, Justice and Strong Institutions (https://www.un.org/sustainabledevelopment/peace-justice/). Students are expected to develop a research project such as the final thesis and to develop it in the context of our continued discussion.

Description for the online twin offered to Aurora students: This year, RUDESA will include an important online component accessible to Aurora students only. Students will dive into and use online archives and sources, such as the Veterans History Project Collection that is digitally housed by the U.S. Library of Congress, to investigate the Battle of the Ruhr Pocket. During this enormous World War II battle, which occurred in April 1945, American and Canadian liberation forces encircled roughly 400,000 German troops in the Ruhr region, Germany’s industrial center. The Ruhr Pocket ended organized resistance against Allied forces on the Western Front. Students of the online course will prepare posters on their findings in the archives. The best will be submitted for exhibition at the annual conference of the Dutch American Studies Association in November 2026.

This class will allow students to improve their Information Literacy, Analysis, Oral and Written Communication, Teamwork, and Intercultural Knowledge competences.

Syllabus for the lecture "Sample preparation in analytical chemistry"

In the analytical process, the sample preparation includes the work steps between sampling and measurement, whereby the original samples are to be converted into a measurable state. The lecture is intended to cover the area of ​​organic analytics, in which there is generally an enrichment or concentration of any analytes and a separation of the analytes from the interfering matrix. The step of sample preparation, after sampling, is often the step with the greatest error-proneness. In many cases it is also the most labor-intensive. Therefore, the aim nowadays is to automate, miniaturized and more environmentally friendly (green)sample preparation to a large extent. The lecture is intended to give an overview of the existing classic and modern solvent-free techniques. A focus will be on the physico-chemical parameters that lie behind these methods. As far as possible, methods available at the chair are explained for better practical relevance in the laboratory and shown through handouts in the lecture.

The lecture is an elective course in the Master programs Water Science and Chemistry in the winter semester and comprises 2 SWS (3 CP).

 The course tales place online.

1 Course overview
1.1 Why sample preparation? - Benefits and limitations
1.2 Classic and modern sample preparation methods
1.2 Green Sample Preparation Methods
1.3 Automation of enrichment techniques
2 Evaluation of sample preparation techniques
2.1 Separation factor, enrichment factor, depletion factor
2.2 Extraction Yield
3 Classification of Distribution Processes
4 Separations due to differential distribution between two immiscible phases
4.1 Distribution between two liquids - Nernst distribution theorem
4.2 Solvents - solvent mixtures - synergistic effect - extracted compounds - chemical reactions during distribution
4.3 Poly parameter linear free energy relationships (PP-LFERs)
4.4 Influence of pH on partition equilibria
4.5 Salting Out
4.6 Partitioning
4.7 Perforation
4.8 Single Drop Microextraction (SDME) 
4.9 Liquid Phase Microextraction (LPME)
5 Membrane-Assisted Liquid/Liquid Extraction
5.1 Membrane Assisted Solvent Extraction (MASE)
5.2 Electromembrane Extraction (EME)
6 Dispersive Methods
6.1 Dispersive liquid microextraction (DLME)
6.2 QuEChERS
7 Distribution between liquid and solid phase
7.1 Soxhlet Extraction
7.2 Accelerated Solvent Extraction (ASE), (Pressurized Fluid Extraction PFE)
7.3 Ultrasonic Extraction (USE)
7.4 Microwave Assisted Extraction (MAE)
7.5 extraction temperature above the LM boiling point)
7.6 Supercritical Fluid Extraction (SFE)
7.7 Solid phase extraction (SPE)
7.8 Solid phase microextraction (dSPME)
7.9 Stir Bar Sorptive Extraction (SBSE)
7.10 Thin Film SPME (TF-SPME)
7.11 Micro extraction by packed sorbent (MEPS)
8 Distribution between liquid and gas phase
8.1 Solubility of gases in liquids
8.2 Air-water partition coefficient and Henry's constant
8.3 Static Headspace
8.4 Dynamic Headspace
8.5 Stripping Techniques
8.6 Purge and Trap (P&T)
8.7 Pervaporation
8.8 Direct Solid-Phase Microextraction (hSPME)
8.9 PAL SPME Arrow
9 Adsorption and absorption of gases on solids
9.1 Sorption isotherms
9.2 Sorption materials
9.3 Thermal desorption (TD)
9.4 Headspace SPME (hSPME)
9.5 In tube extraction (ITEX)