Browsing by Title
Now showing items 5276-5295 of 9884
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The (Ir)relevance of the Crop Yield Gap Concept to Food Security in Developing Countries: With an Application of Multi Agent Modeling to Farming Systems in Uganda
Schreinemachers, Pepijn (2006)This thesis scrutinizes the relationship between the width of the crop yield gap and farm household food security. Many researchers have argued that an exploitable gap between average crop yields and the genetic yield ... -
Iranian Intellectuals’ Experience of Modern Science
Liedtke-Khorsandi, Zohreh (2020-02-10)This study examines the picture of European science as it appeared to Iranians’ eyes and their perception of the relationship between new European science and Iranian’s indigenous science. The period on which this dissertation ... -
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Iron isotope fractionation in arable soil and graminaceous crops
Xing, Ying (2020-11-24)Soils contain large quantities of Fe, however, the Fe-solubility is very low. Plants have developed two efficient strategies to secure Fe uptake from soil under Fe-deficient conditions: (i) the sequential acidification-r ... -
Irreversible Antagonists for the Adenosine A2B Receptor
Temirak, Ahmed; Schlegel, Jonathan; Voss, Jan; Vaaßen, Victoria; Vielmuth, Christin; Claff, Tobias; Müller, Christa (2022-06-13)Blockade of the adenosine A2B receptor (A2BAR) represents a potential novel strategy for the immunotherapy of cancer. In the present study, we designed, synthesized, and characterized irreversible A2BAR antagonists based ... -
Irrigate or migrate?: Local livelihood adaptation in Northern Ghana in response to ecological changes and economic challenges
Schraven, Benjamin (2010-11-05)At all times, people had to adapt to processes of ecological change. But the strategies and mechanisms of the adapting of livelihoods to those processes have certainly gained more and more global attention since the effects ... -
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Is there Unrecognized Potential in Neglected Livestock Species?
Oguche, Maria; Kariuki, Juliet; Birner, Regina (2021-12)Population growth and changing consumption patterns have resulted in an increasing demand for animal protein, especially in Sub-Saharan Africa (SSA). In meeting this demand, efforts have been geared towards intensifying ... -
Der Islam in Shaanxi: Geschichte und Gegenwart: Mit einer Untersuchung zum islamisch-christlichen Dialog in Zeiten der Globalisierung und des Ökumenismus
Hu, Fan (2008)Die vorliegende Arbeit, die in ihren Feststellungen auch auf ganz China bezogen werden kann, hat sich zur Aufgabe gemacht, die Entwicklung des Islam in Shaanxi vom Beginn seines Eindringens während der Tang-Zeit bis zur ... -
Islamic Culture in the Khanate of Kazan: A Report Sent from Kazan in 1550 during the Reign of <Süleyman> the Lawgiver
Binbaş, Evrim; Togan, A. Zeki Velidi (2022-11-14)The article presents the renowned Bashkir-Turkish historian A.Zeki Velidi Togan’s (1890-1970) article on the unsuccessful 1549-1550 siege of the city of Kazan by Ivan IV in English translation with an extensive introduction. ... -
Isogeometric Approximation of Variational Problems for Shells
Perl, Ricardo (2016-05-27)The interaction of applied geometry and numerical simulation is a growing field in the interplay of com- puter graphics, computational mechanics and applied mathematics known as isogeometric analysis. In this thesis we ... -
Isolation of secondary fungal metabolites and their influence on sphingolipid metabolism
Kralj, Ana (2007)Development of new drugs, especially in the area of oncological and infectious diseases, represents today one of the most important research fields. The marine environment is a tremendous source of natural products. Drug ... -
Isolation, characterization and interactions of soil microorganisms involved in the enhanced biodegradation of non-fumigant organophosphate nematicides
Cabrera Motta, José Alfonso (2009-08-25)The most widely used pesticides utilized for the management of plant-parasitic nematodes belong to the organophosphorus group. Their efficacy may be reduced in areas where adapted microorganisms accumulate that are capable ... -
Isolierte laterale Dens axis Asymmetrie im Trauma-CT: Diagnostische Wertigkeit der ergänzenden MRT zur Beurteilung ligamentärer Verletzungen
Ginzburg, Daniel (2024-02-01)Nach zervikalen Traumata stellt die CT Bildgebung der HWS einen entscheidenden Bestandteil der Primärdiagnostik zur Abklärung möglicher Verletzungsfolgen dar. Trotz einer hohen Sensitivität für knöcherne Verletzungen ist ... -
Isolierung und Strukturaufklärung von Xanthon-Derivaten, Anthrachinonen, Angucyclinen und anderen Sekundärmetaboliten aus terrestrischen und marinen Bakterien
El-Hachach, Katja (2008)In dieser Arbeit wurden marine und terrestrische Streptomyceten sowie Bakterien aus der Nordsee nach Auswahl aufgrund eines chemischen und biologischen Vorscreenings hinsichtlich ihres Sekundärmetabolitenspektrums genauer ... -
Isolierung von kleinen funktionalen Peptiden durch mRNA Display: Eine neue Klasse von Effektoren des humanen α-Thrombins
Raffler, Nikolai (2002)In der vorliegenden Arbeit wurde das mRNA Display zur Selektion von kleinen funktionalen Peptiden eingesetzt. Diese in vitro Selektionstechnik ermöglicht die kovalente Verknüpfung von Genotyp und Phänotyp eines Proteins. ... -
Isoprene Secondary Organic Aerosol in a Global Chemistry Climate Model
Stadtler, Scarlet (2018-09-26)Atmospheric aerosol influences the climate system, modifying atmospheric radiation directly and indirectly. Up to 90% to the total organic aerosol is formed through the oxidation of hydrocarbons and subsequent nucleation, ... -
Isotopes for fundamental research 83mKr for KATRIN and 101Rh and 109Cd for XRD studies on planets
Rasulbaev, Makhsud (2011-03-15)The feasibility of production of <sup>83</sup>Rb from liquid, natural Br at the Bonn Cyclotron was shown. Production of <sup>83</sup>Rb/<sup>83m</sup>Kr generators for KATRIN Collaboration was optimized. <sup>83m</sup>Kr ...