Bestimmte Peptidverbindungen besitzen Geschmacksqualitäten, welche sie für einen Einsatz in Lebensmitteln qualifizieren. Neben einer chemischen Synthese bestimmter Verbindungen können Peptide auch durch Hydrolyse intakter Proteine gewonnen werden. Zur Trennung und Aufreinigung stellt die Crossflow-Filtrationstechnik eine skalierbare Alternative zu chromatographischen Trennverfahren dar. Im Rahmen dieser Arbeit wurde ein Crossflow-Diafiltrationsverfahren unter Verwendung hydrophilisierter Polysulfon-Membranen (MWCO: ...

Trotz zahlreicher Anstrengungen gehen weltweit große Mengen an Lebensmitteln nach der Ernte verloren. Insbesondere in Situationen mit begrenztem Zugang zu Ressourcen stellt die Identifizierung geeigneter Maßnahmen eine große Herausforderung dar. Entgegen der klassischen Herangehensweise, die oft technisch orientiert ist, verwendet diese Dissertation einen akteursorientierten und systemischen Ansatz. Dies ermöglicht, die Perspektiven der Akteure zu berücksichtigen und ein kontextabhängiges Verständnis für den Umgang ...

Anchote (Coccinia abyssinica) is an indigenous tuber crop of the Ethiopian Highlands. It is popular in the western Oromia Region of the country. Apart from food, the crop is also used in traditional medicine. Anchote tubers possess two variations in its tissue colour, red and white. In this study, a small market survey and a nutritional comparison of red and white anchote were conducted. White tissue anchote seems to be more popular, due to its soft texture and ease of cooking. However, the red variant was considered ...

Sea buckthorn (Hippophae rhamnoides L.) is a dioecious, wind-pollinated shrub growing in Eurasia including the Karakoram Mountains of Pakistan (Gilgit-Baltistan territory). Contrary to the situation in other countries, in Pakistan this species is heavily underutilized. Moreover, a striking diversity of berry colors and shapes in Pakistan raises the question: which varieties might be more suitable for different national and international markets? Therefore, both morphological and genetic diversity of sea buckthorn ...

3D point cloud analysis of imagery collected by unmanned aerial vehicles (UAV) has been shown to be a valuable tool for estimation of crop phenotypic traits, such as plant height, in several species. Spatial information about these phenotypic traits can be used to derive information about other important crop characteristics, like fresh biomass yield, which could not be derived directly from the point clouds. Previous approaches have often only considered single date measurements using a single point cloud derived ...

Child undernutrition is a critical public health challenge in Ethiopia. One of the immediate causes of child undernutrition is inadequate dietary intake as a result of relying on one or few starchy staples. Utmost attention should be given to improving diets of infants and young children if significant and fast changes are to be seen in the reduction of undernutrition. This dissertation examines the potentials of utilising appropriate food processing technologies for developing upgraded food products for infants and ...

Although elevation patterns of diversity for plants and animals are well known, understanding of variations in fungal community structure along elevation gradients is limited. Soil fungi play an important role in soil microbial communities, where they improve soil organic matter (SOM) turnover and nutrient circulation. Hence, any change in fungal community structure will have strong effects on soil and ecosystem functioning. The main purpose of this thesis is therefore to investigate how climate induced shifts in ...

Various research fields, like organic agricultural research, are dedicated to solving real-world problems and contributing to sustainable development. Therefore, systems research and the application of interdisciplinary and transdisciplinary approaches are increasingly endorsed. However, research performance depends not only on self-conception, but also on framework conditions of the scientific system, which are not always of benefit to such research fields. Recently, science and its framework conditions have been ...

Sports fields provide a recreation space for citizens, but also generate grass biomass, which is cut weekly during the main seasons and therefore could be used in energy generation (combustion or anaerobic digestion). To evaluate the technical suitability of the grass cuttings, silage was produced from four sports fields during one vegetation period and investigated for relevant properties. Potential methane yield was determined with batch tests. Mean methane yield was 291.86 lN·kg−1 VSadded (VS, volatile solid). ...

Im Freilandgemüsebau der gemäßigten Klimazone Europas erhöhen Witterungsunsicherheiten und Trockenstress im Frühjahr und Sommer das Risiko für Ernteeinbußen und –ausfälle. Insbesondere bei im Dammanbau dicht unter der Oberfläche der Dammkrone gesäten Kulturen, wie beispielsweise der Möhre, besteht bei trockener Witterung die Gefahr eines ungleichmäßigen und verzögerten Auflaufens mit Folgen für die Bestandsentwicklung. Eine boden- und pflanzenschonende Beregnung der Dammkrone, die genügend pflanzenverfügbares Wasser ...