Ostwestfalen-Lippe University of Applied Sciences and Arts
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The Development of the Bacterial Community of Brown Trout (Salmo trutta) during Ontogeny
No full textBrown trout (Salmo trutta) is an important aquaculture species in Germany, but its production faces challenges due to global warming and a high embryo mortality. Climate factors might influence the fish’s bacterial community (BC) and thus increase embryo mortality. Yet, knowledge of the physiological BC during ontogeny in general is scarce. In this project, the BC of brown trout has been investigated in a period from unfertilized egg to 95 days post fertilization (dpf) using 16S rRNA gene amplicon sequencing. Developmental changes differed between early and late ontogeny and major differences in BC occurred especially during early developmental stages. Thus, analysis was conducted separately for 0 to 67 dpf and from 67 to 95 dpf. All analyzed stages were sampled in toto to avoid bias due to different sampling methods in different developmental stages. The most abundant phylum in the BC of all developmental stages was Pseudomonadota, while only two families (Comamonadaceae and Moraxellaceae) occurred in all developmental stages. The early developmental stages until 67 dpf displayed greater shifts in their BC regarding bacterial richness, microbial diversity, and taxonomic composition. Thereafter, in the fry stages, the BC seemed to stabilize and changes were moderate. In future studies, a reduction in the sampling time frames during early development, an increase in sampling numbers, and an attempt for biological reproduction in order to characterize the causes of these variations is recommended
Forum 4: Grenzen überschreiten: Brücken zwischen beruflicher und akademischer Bildung öffnen neue Bildungswege.
No full textAnhand von Beispielen aus den InnoVET-Projekten Bildungsbrücken OWL und BBChemie werden Chancen, Herausforderungen und Ideen zu folgenden Fragestellungen diskutiert:
Wie können Bildungskarrieren durch Zusatzangebote angereichert werden und dadurch attraktiver gestaltet werden?
Welche Chancen entstehen für Lernende, wenn berufliche und akademische Bildung zusammenkommen?
Wie kann ein bereichsübergreifendes Netzwerk die Lehrenden aus akademischer und beruflicher Bildung bereichern?
Wie gelingen bereichsübergreifende Lern- und Lehrangebote für theorieschwächere Azubis mit praktischen Potenzialen?
Das Forum ist im interaktiven Format des Disqspace gestaltet. Nach einem Auftaktimpuls finden zweimal nacheinander vier parallele Mini-Workshops statt. Die Ergebnisse werden im Plenum gesammelt
Analoge Fotografie in digitalen Zeiten - Warum noch Film belichten?
Get PDFDiese Arbeit untersucht mit Hilfe von Literaturanalyse und Befragungen (Umfrage und Interviews) die Gründe, aus denen Menschen im digitalen Zeitalter noch zu analogen Kameras greifen. Besonderer Fokus wird auf die Verbindung zwischen dem Werkzeug Kamera und dem Mensch gelegt und wie sich diese Verbindung auf den kreativen Prozess beim Fotografieren auswirkt
Untersuchung zur katalytischen Beschleunigung bei der Ethanolbildung in natürlichen Fruchtsäften : Präsentation der Bachelorarbeit von Katrin Fahrenkrug unter Betreuung von Herrn Prof. Dr. Manfred Sietz
Get PDFIn dieser Arbeit wurde untersucht, wie sich die Verwendung eines Nanogold-Kieselgel-Katalysators auf den Verlauf einer enzymatischen Gärreaktion auswirkt. Diese Untersuchungen basieren auf einer vorherigen Arbeit, in der nur der Beginn der Gärung betrachtet wurde [1]. Bei einer enzymatischen Gärung, wird aus Glucose, unter Verwendung von Adenosindiphosphat Ethanol, Kohlenstoffdioxid und das energiereichere Adenosintriphosphat gebildet (Formel 1) [2]. Als Versuchsmedium wurde der Fruchtsaft Apfelsaft gewählt. Bei den Untersuchungen wurde insbesondere auf die Fortsetzung der Reaktion nach Bildung der ersten Gasblase geachtet, da die Frage, ob es sich hierbei um ein einmaliges Ereignis handelt aufgekommen ist. Um dies zu untersuchen, wurden Versuche mit drei Messreihen durchgeführt. Diese werden im Folgenden als Messreihen „Hefe“, „Hefe und Katalysator“ und „Katalysator“ bezeichnet. Die einzelnen Versuche decken unterschiedliche Versuchszeiträume und ab
Conceptual Design of a Portable Measuring Box for Monitoring Ripple Currents affecting the Lifetime of Electrolytic Capacitors in Industrial Open DC Grids
No full textDue to the increasingly widespread use of efficient power electronics, DC grids today offer more and more advantages over AC grids. In the field of energy supply, the use of DC technology is also growing and is state of the art in offshore, high-voltage, vehicle and data center applications. The spread of industrial open DC grids is currently starting and is completely different due to the requirements. The DC links of each device are connected directly and the capacitors of individual devices shall not be overloaded. Especially not by ripple currents from other devices. The paper describes the easy use of a measuring box which evaluates and optically displays the load of electrolytic capacitors. No further measuring equipment is required. The simple, temporary integration into a grid makes it easy to check whether capacitors of individual devices are overloaded, and their lifetime is limited
A Field Study of Greenhouse Gas Emissions Reduction though Intelligent Room Heat Management as low investment Measure tested on the District Hall of Lippe
No full textThe construction of climate-friendly new buildings is not enough to enable greenhouse gas neutrality by the second half of this century. To achieve it, the existing building stock needs to be renovated or retrofitted step by step. This study investigates the impact of a low-investment greenhouse gas emission reduction measure based on intelligent room heat management (IRHM) which is being tested to date on the main administrative building of district Lippe, built in 1979-80, in Germany. This system intends to reduce the energy consumption of further districts’ buildings that, due to the high costs, cannot be intensively renovated in the medium term. IRHM consist in the installation of an intelligent controller that, based on dynamic usage profiles, optimise the operation of the existing heating system. Through presence sensors in the office rooms, the employee’s worktime routine is continually registered to enable the creation of heating patterns that maximize heat comfort during worktime while energy is saved by reducing room temperature when the office is unoccupied. The analysis is based on collected data of heat energy consumption, room climate and user behaviour in five corridors: three with IRHM and two control corridors without it. In both control corridors and two of the IRHM corridors the façade was completely refurbished in 2021 while the remaining one still preserves the original façade to date. Heating demand calculations were conducted to enable a wider exploration of usage scenarios. The results obtained so far, show significantly lower heat consumption in the corridors with IRHM, reaching a maximum of 90% energy consumption reduction compared to the control corridors. An optimized operation of the radiators is clearly recognizable as the system anticipates the employee’s presence and reach the comfort room temperature (set-up temperature) before the beginning of the working time, keeping it while the room in use. It also reacts properly switching down to set-back temperature so far, no presence is detected. According to the heating demand calculations, the implementation of a set-back temperature out of worktime can reduce the energy consumption up to a 48%. Combined with the refurbishment of the façade, the heating demand sinks up to an 87%. Field data shows an even more optimistic perspective, as energy consumption was in average even lower than the calculated demand. The on-site implementation of the IRHM is accompanied by social science research aiming at getting feedback on thermal comfort as well as on employees’ experience with the handling of the intelligent room heat management device. Up to now three online surveys were conducted during heat periods between 2021 and 2023 with 18 to 21 participants from two-person offices. First analyses show that occupants’ satisfaction with temperature changed from a neutral ranking to a slightly positive voting. Room temperature was found to be comfortable as soon as entering the office in the morning. Preferred room temperature shifted over the survey time points from 21°C- 22°C to under 21°C. Further analyses will focus on general energy-relevant attitudes and habits such as windows-door opening