E-Dissertationen: Browsing E-Dissertationen by Title
Now showing items 776-795 of 1013
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A rapid impact assessment approach for decision support in food policy
Novelli, Emanuele (2012-06-12)Under the pressure of many alternative stakeholders’ demands, the food policy maker needs to consider regulatory decisions in order to grant a safe final product for the consumer, as well as to foster the improvement of ... -
Räumliche Variabilität von Bodeneigenschaften mit Relevanz für das Verhalten von Herbiziden: ein Optimierungsansatz für den Präzisionspflanzenschutz
Mertens, Franz Michael (2008)Ziel dieser im Rahmen des DFG-Graduiertenkollegs 722 „Präzisionspflanzenschutz“ angefertigten Arbeit war es, die teilflächenspezifische Anwendung von Herbiziden durch die Einbindung von Bodeninformationen zu optimieren. ... -
Re-Solution - understanding the uncertainty in regional applications of crop models
Angulo Villacís, Carlos Lenín (2015-02-27)Uncertainties emerging from the scale change and data constraints when analyzing and further utilizing the results of regional crop model applications are largely unclear. The present thesis offers a systematic analysis ... -
Reactions between nitrite and soil organic matter and their role in nitrogen trace gas emissions and nitrogen retention in soil
Wei, Jing (2018-01-22)As a key intermediate of both nitrification and denitrification, nitrite (NO<sub>2</sub><sup>-</sup>) is highly chemically reactive to soil organic matter (SOM), and it was proved previously that considerable amounts of ... -
Ready for regrowth: A physiological and metabolic characterization of young sugar beets under temporary drought
Wedeking, Rita (2018-06-18)Although the sugar beet belongs to the rather drought relevant species, water availability plays a crucial role in terms of plant development and yield formation, hence water deficits can lead to adverse consequences. Aim ... -
Real-time quantification of oxygen isotope exchange between carbon dioxide and leaf/soil water in terrestrial ecosystems with laser-based spectroscopy
Gangi, Laura (2015-08-26)The oxygen isotope ratio of atmospheric carbon dioxide (δ<sup>18</sup>O-CO<sub>2</sub>) can be used to partition the gross fluxes of CO<sub>2</sub> in terrestrial ecosystems, such as soil respiration and plant assimilation, ... -
Reduction of Gaseous Emissions from Slurry by the Application of Alkaline Additives
Holtkamp, Felix (2023-12-12)The agricultural sector is undergoing a profound transformation process to meet international and national regulations and laws. These are being enacted by policymakers to limit the sector's tremendous gaseous emissions ... -
Regulation of adiponectin expression by trans-cinnamic acid and niacin in murine and bovine adipocytes in vitro
Kopp, Christina (2016-06-24)Adipose tissue secretes multiple metabolically important proteins known as adipokines, one of the most abundant is adiponectin (AdipoQ). Known as an important modulator of glucose and fat metabolism, adipoQ is a key regulator ... -
Regulation of branched-chain amino acid metabolism in major metabolic tissues of dairy cows during late pregnancy and early lactation
Webb, Laura Ashley (2020-04-01)For dairy cows, the transition from late pregnancy to early lactation is characterized by dramatic changes in endocrine status, nutrient utilization as well as tissue metabolism. Specific metabolic processes, e.g., in ... -
The relation between indicators for the crediting of emission rights and abatement costs: a systematic modeling approach for dairy farms
Lengers, Bernd (2013-12-18)With the Kyoto Protocol, industrial nations agreed to reduce greenhouse gas (GHG) emissions compared to the 1990 level. Therefore, in Europe, the emissions trading scheme (ETS) was implemented, to date incorporating ... -
The Relationship between the Resource Curse and Genuine Savings as an Indicator for Weak Sustainability: Theoretical Background and Empirical Evidence
Boos, Adrian (2017-07-11)This dissertation deals with the relationship between the Resource Curse (RC) – the empirically proven paradox that countries with abundant natural resources often show slower economic growth – and a measure for the ... -
The relevance of dietary insulin demand and dietary protein intake during adolescence for the development of body composition and the adult GH-IGF axis
Joslowski, Gesa (2014-05-26)Obese children are likely to stay obese, resulting comorbidities may emerge already in childhood and tend to persist until adulthood. So-called critical periods for overweight development are early life, the time around ... -
Relevance of mineral nutrition and light quality for the accumulation of secondary metabolites in Centella asiatica and Hydrocotyle leucocephala
Müller, Viola (2014-01-17)The key objective of the present work was to acquire fundamental knowledge on the impact of nutrient supply and light quality on the accumulation of pharmaceutically relevant secondary metabolites, particularly saponins ... -
Die Relevanz von Prüfmechanismen in der Lebensmittelwirtschaft: Eine empirische Untersuchung über Qualitätsstandards
Fritzen, Simone (2016-08-29)Rohwaren werden in den Ketten der Agrar- und Ernährungswirtschaft international beschafft. Mangelhafte Transparenz innerhalb der Wertschöpfungskette ist kennzeichnend für die Beschaffungssituation, mit der viele Unternehmen ... -
Remineralizing soils? The agricultural usage of silicate rock powders in the context of One Health
Swoboda, Philipp (2022-06-29)The concept of soil health describes the capacity of soil to fulfill essential functions and ecosystem services. Healthy soils are inextricably linked to sustainable agriculture and are crucial for the interconnected health ... -
Resilience, collapse and reorganization of a rangeland socio-ecological system in South Africa
Rasch, Sebastian (2016-05-24)Communal rangelands in semi-arid areas are complex socio-ecological systems (SES). Their complexity arises from non-linear feedbacks between the social- and the ecosystem. To understand the social system requires tackling ... -
Resistenzinduktion und Pathogenabwehr durch Reynoutria sachalinensis-Extrakt und Physcion: Signalkette im Vergleich zu systemischen Induktoren und Beziehungen zur Hypersensitiven Reaktion
Müller, Susanne (2004)Der heutige Stand der Forschung zeigt, daß die Vorgänge der Induzierten Resistenz (IR) bei Pflanzen relativ spezifisch in bezug auf verschiedene Induktoren, Wirtspflanzen und Pathogene sind. Neben vielen bekannten chemischen ... -
Resource Allocation for Health in Tanzania – Determinants and Development Implications
Simon, Michael (2015-04-09)The optimal allocation of scarce resources for health improvement is a crucial factor to lower the burden of disease and to strengthen the productive capacities of people living in developing countries. This research project ... -
Resource utilization and sustainability of conservation-based rice-wheat cropping systems in Central Asia
Devkota, Krishna Prasad (2011-08-26)Excessive and inefficient water use, intensive soil tillage and decreasing soil fertility have caused land degradation and desertification, which are threatening the sustainability of rice-wheat systems in the irrigated ... -
Resource-efficient feeding of fattening pigs based on body composition related performance groups: Studies on technical and environmental aspects
Lengling, Alexandra Katharina (2021-10-26)Livestock husbandry is increasingly confronted with the growing demands for more animal welfare and better environmental protection. As the largest component of agricultural animals in meat production, fattening pig husbandry ...