E-Dissertationen: Browsing E-Dissertationen by Title
Now showing items 806-825 of 1014
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Robust determination of station positions and Earth orientation parameters by VLBI intra-technique combination
Böckmann, Sarah (2010-10-22)In this thesis, it is shown that combining contributions of different VLBI analysis centers, a so called intra-technique combination, improves the robustness and stability of the final VLBI results. For this purpose, a ... -
Robust Wide-Baseline Stereo Matching for Sparsely Textured Scenes
Dickscheid, Timo (2011-08-19)The task of wide baseline stereo matching algorithms is to identify corresponding elements in pairs of overlapping images taken from significantly different viewpoints. Such algorithms are a key ingredient to many computer ... -
The role of abiotic processes in the formation and degradation of gaseous nitrogen compounds in the soil
Heil, Jannis (2015-09-24)Soils are a major source of nitrogen (N) trace gases, especially of nitrous oxide (N<sub>2</sub>O) and nitric oxide (NO). The two microbial processes nitrification and denitrification are considered the major contributors ... -
Role of Agricultural Cooperatives in Agricultural Development: The Case of Menoufiya Governorate, Egypt
Mohamed, Farahat Abdel-Seed (2004)The main objectives of the study are to identify the current status of agricultural cooperatives in Menoufiya Governorate in Egypt and determine the following items as well as the variables affecting them: (1) Agricultural ... -
The role of cellular and extracellular MicroRNAs in bovine follicular development and as potential indicators of early pregnancy
Etay, Samuel Gebremedhn (2017-04-06)MicroRNAs (miRNAs), a class of short non-coding RNA molecules, emerged as major regulators of ~60% of all protein encoding genes. These molecules play an important role in mammalian follicular growth and embryonic development ... -
The Role of Civil Society in the Promotion of Small and Medium Scale Entrepreneurial Development: A community level empirical study in the Western Region of Ghana
Akushie Wittmann, Sophia (2014-07-01)Approaches towards supporting economic growth particularly within the West African sub region have experienced structural setbacks common to most developing economies. Within growing economies such as Ghana, the development ... -
The role of inositol pyrophosphates in the regulation of plant stress responses
Lange, Esther (2023-07-13)Inositol polyphosphates (InsPs) have been described as important messengers in eukaryotic cells. InsPs with one or more diphospho groups are also termed inositol pyrophosphates (PP-InsPs), which gained special attention ... -
The role of local agroforestry practices for enhancing food and nutrition security of smallholding farming households: The case of Yayu area, south-western Ethiopia
Jemal, Omarsherif Mohammed (2018-08-15)When agriculture becomes focused on globally traded commodities, local nutrition may be at risk. The study tested this hypothesis in the coffee landscape of Yayu, south-west Ethiopia, by investigating the role of local ... -
The role of post-harvest supplementary light exposure for ripening and quality development of tomato fruit
Panjai, Lachinee (2020-11-23)The major aim of the present work was to evaluate the optimal exposure time and effects of red light and short periods of daily ultraviolet (UV) on the post-harvest quality of green tomato fruit during ripening. The ... -
The role of production method and country-of-origin labelling in consumers' food choice: Empirical study based on meta-analyses and stated preference choice experiments
Yeh, Ching-Hua (2019-10-24)Organic production and domestic origin of food serve for consumers as extrinsic cues for food safety and food quality dimensions. With consumers' growing interest in food quality and their increasing concern regarding food ... -
The role of Rboh-mediated ROS and glutathione in plant-nematode interaction
Hasan, Md. Shamim (2019-11-05)Aerobic life forms are known for constant production of reactive oxygen species (ROS), the deleterious end-products of aerobic energy that are able to provoke cellular damage. The ROS production in plants can be triggered ... -
Role of root plasticity in response to soil compaction in sorghum
Correa Reyes, José Eduardo (2022-06-17)Compacted soils limit crop production and affect millions of hectares of agricultural land globally. Plants vary in tolerance to soil compaction and roots express various plastic responses. Unfortunately, the importance ... -
The Role of Storage and Information in Stabilizing Food Prices and Supplies
Brockhaus, Jan Henrik (2016-08-03)High and volatile food prices can push people into poverty, impact production and consumption, discourage investments, and lead to social unrest. Thus, due to occasional global food shortages as in 2007/08 and frequent ... -
Role of termites for the distribution patterns of carbon and phosphorus fractions and the genesis of tropical soils, Brazil
Rückamp, Daniel (2012-07-27)Tropical soil fertility is limited by low phosphorus (P) availability, limited accumulation of organic matter and by advanced stages of pedogenesis. Termites are well-known soil-engineers, which accumulate clay, organic ... -
The role of transaction costs in strengthening agricultural market linkages to achieve higher welfare in Tanzania
Bueno Rezende de Castro, André (2023-11-24)Small-scale farmers (SSFs) have high levels of food insecurity and poor nutrition that are reflections of the still high prevalent poverty rates. Semi-subsistence smallholder farming is still predominant in many parts of ... -
The roles of nutrition-sensitive interventions and market access in enhancing household food security and resilience in Sierra Leone
Bonuedi, Isaac (2021-05-17)Using Sierra Leone – a post-conflict country in West Africa – as a case study, this dissertation addresses pressing issues on how to make smallholder agriculture more nutrition-sensitive, mitigate the adverse effects of ... -
Root and shoot phenotypic traits and their expression in response to sowing density in spring barley (Hordeum vulgare)
Hecht, Vera Lisa (2019-11-12)Much is known about plant performance under controlled conditions and much about performance under field conditions as well as on single plants and populations. The extent, however, to which the variability of traits, ... -
Root growth of sole and mixed cover crops in organic farming
Kemper, Roman (2024-01-23)Cover crops are an important tool in arable farming systems. They provide many different agroecosystem services. For many of these functions, such as nutrient uptake, erosion prevention and soil structure formation, the ... -
Root-restricting layers in German agricultural soils: Extent, cause and management strategies
Schneider, Florian (2020-10-21)Subsoil, i.e., soil below 30 cm depth, harbours great amounts of water and nutrients. However, physical and chemical barriers for vertical root elongation may restrict plants from accessing subsoil resources. Such ... -
Ruminal degradation of ochratoxin A – in vitro investigations at varying rations and rumen microbial populations
Mobashar, Muhammad (2011-11-15)The primary objective of the present study was to evaluate the relative contribution of different rumen microbial populations (MP) and the effect of ration on degradation of ochratoxin A (OTA), gas, short chain fatty acids ...