Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 1129 for “"Naturally-occurring"”.
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Recurrences : exploiting naturally occurring analogues
In der vorliegenden Arbeit wird die Wiederkehr im Phasenraum ausgenutzt. Dabei werden drei Hauptresultate besprochen. 1. Die Wiederkehr erlaubt die Vorhersagbarkeit des Systems zu quantifizieren. 2. Die Wiederkehr enthaelt (unter bestimmten Voraussetzungen) sämtliche relevante Information über die …
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Total Synthesis of Naturally Occurring Antimicrobial Peptides
… thesis describes the first total synthesis of naturally occurring lanthipeptide tikitericin, as well as its N-terminal truncated analogues. The thesis also explores the total chemical synthesis of the lipopeptide antibiotic daptomycin and analogues along with evaluation of their antibacterial …
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Syntheses related to some naturally occurring naphthopyranquinones
… and the use of these in the syntheses of several naturally occurring pyranquinones or their derivatives, has been investigated. In the course of this work, an unusual Fries rearrangement and a novel baseinduced cyclisation were discovered - the latter affording several naphtho[2,3-c]pyrans in high …
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Explanations and communicative constraints in naturally occurring discourse
… the thesis and to why I think research based on naturally occurring discourse is important. Research on explanations in social psychology has been dominated by research which has gone on under the heading of attribution theory. In chapter two I address a controversy in the application of concepts …
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Total synthesis of naturally occurring glycosylated tetramic acids
The first synthesis of a naturally occurring 3-acyl tetramic acid glycoconjugate was investigated. An endofungal metabolite called epicoccamide D was synthesized for the first time. This was accomplished in 19 steps resulting in a 17% overall yield. The total synthesis was built on a modular base …
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The synthesis of derivatives of naturally occurring naphthalenes
The ansamycins are a large group of natural products which have attracted considerable attention, largely as a result of their range of biological activity. The laboratory synthesis of an ansamycin has been simplified into the independent construction of the aromatic nucleus and the ansa chain, …
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Oxovanadium(IV) and (V) complexes with naturally-occurring molecules
Complexes with naturally-occurring ligating moieties were prepared and studied aspart of an overall process to understand the coordination chemistry of vanadium. Bis(kojato) oxovanadium(IV), VO(ka)2, bis(3-oxy-1,2-dimethy1-4-pyridinonato)-oxovanadium(IV), VO(dpp)2, …
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A Rudimentary Framework Of The Emergence Of Naturally-Occurring Mentorships
<p>Cross-age relationships between youth and adults that develop organically outside the construct of youth programs are examples of natural mentoring relationships. In the United States, research has demonstrated the positive impact of these mentorships. Scholars have begun applying concepts …
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Effect of Carbonaceous Nanoparticles on Naturally Occurring Iron Reduction by Carboxylates
… (particle diameter ≤ 100 nm), is investigated on naturally occurring processes that increase the abundance of bioavailable iron. Enhancing iron bioavailability (i) increases primary productivity of iron-limited microorganisms, affecting the carbon cycle and global climate, and (ii) increase …
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Effect of Naturally Occurring DNA Modifications on DNA Structure and Packaging
… This thesis focuses on elucidating the effect of naturally occurring DNA modifications on the properties of dsDNA and nucleosomes. dsDNA sequences systematically modified with various T derivatives were characterized using classical biophysical techniques to assess the effect of these DNA …
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Abundance, Distribution, and Geometry of Naturally Occurring Macropores in Stream Banks
… the abundance, distribution, and geometry of naturally occurring surface-connected macropores in the banks of 20 streams across five physiographic provinces in the Eastern United States. We identified a total of 1,748 macropores, which were present in all 20 streams, with 3.8 cm average width, …
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Decomposition and Fire Retardancy of Naturally Occurring Mixtures of Huntite and Hydromagnesite.
Mixtures of the two minerals huntite and hydromagnesite have been successfully used as a fire retardant additive in polymers for many years. The onset of decomposition of hydromagnesite is at a higher temperature than that of aluminium hydroxide but lower than that of magnesium hydroxide, the two …
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Antimicrobial effects of naturally occurring compounds against microorganisms relevant to food safety
… 2006. Research on the potential application of naturally occurring compounds in the food industry has recently gained increasing attention.<br/><br/>This study aim at evaluating the antimicrobial effects of naturally occurring compounds against pathogenic microorganisms relevant to food safety, …
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Evaluation of a nontidal riparian wetland as a naturally occurring decontamination zone
The potential harmful effects of agricultural chemicals on human health and the Chesapeake Bay have led to the need to identify economical practices that limit the chemicals impact on surface and ground water contamination. The agricultural practices of the Atlantic Coastal Plain in Virginia have …
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Naturally occurring resistance to Varroa destructor in the Western honey bee (Apis mellifera)
The honey bee is an important social insect; it along with other bee species can be regarded as a keystone organism. The pollination services bees provide are invaluable not only in terms of human health and food security, with an estimated worth of €153 billion to food production (Gallai et al., …
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Investigating The Use Of Naturally Occurring Spoken French In Adult Foreign Language Learning
… and desirability of introducing samples of naturally occurring spoken French to adult language learners at an early stage of the learning process to develop perception and listening skills. The literature review examines the status of the spoken language, the notion of authenticity of …
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