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 3818 for “"β"”.
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Investigations in the chemistry of transition metal complexes containing the tripodal amine β,β′,β″-triaminotriethylamine
<p>Although the research reported in this thesis is purely fundamental, it was of interest to me to discover some of the areas in which knowledge of the systems studied here might have practical application.</p> <p>Polyamines themselves are important biologically and are found in various body …
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A general catalytic β-C–H carbonylation of aliphatic amines to β-lactams
Carbonyl compounds are of central importance to organic chemistry and their reactions have been described as the ‘backbone of organic synthesis’. Over recent decades, palladium-catalysed C–H carbonylation reactions have emerged as a powerful means of introducing carbonyl motifs to organic …
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Cyclometalated Platinum β-Diketiminate Complexes
A series of cyclometalated platinum complexes with ancillary β-diketiminate (NacNac) ligands, prepared by a general synthetic route are described. Two different cyclometalating (C^N) ligands―2-phenylpyridine (ppy) and 2-(2,4-difluorophenyl)pyridine (F2ppy)―are used in concert with two different …
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The study of tumor-derived Smad4 mutations in transforming growth factor β (TGF-β) signaling
This document only includes an excerpt of the corresponding thesis or dissertation. To request a digital scan of the full text, please contact the Ruth Lilly Medical Library's Interlibrary Loan Department (rlmlill@iu.edu).
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Nucleophilic Addition to Azoalkenes; Diastereoselective Synthesis of β-Hydroxy Ketones and β,γ-Fused γ-Lactams
The α-alkylation of ketones and their derivatives by the addition of their corresponding enolates to alkyl halides is a fundamental synthetic transformation, but its utility is limited because the key bond-forming step proceeds in a bimolecular nucleophilic substitution fashion. Here in the first …
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β-cell dysfunction in Huntington's disease
Huntington's disease (HD), a fatal neurodegenerative disorder, is associated with an increased risk of diabetes mellitus. The reason for this is unknown, but considering the functional similarities of neurons and the insulin secreting pancreatic β-cell, pathological mechanisms may be shared by both …
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β-Uniform Convexity and Divisible Domains
Divisible convex sets have long been important in the study of Hilbert geometries. When a divisible convex set is an ellipsoid, the Hilbert geometry it induces is the hyperbolic space. In general, strictly convex divisible domains exhibit negative curvature properties, but only the ellipsoid is a …
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Corrosion resistance of modified β-Eucryptite
The corrosion resistance of chemically modified β-eucryptite (Li<sub>0.41</sub>Mg<sub>0.035</sub>AlP<sub>0.52</sub>Si<sub>0.48</sub>0₄) having low expansion anisotropy and a near zero coefficient of thennal expansion was evaluated. Samples were exposed to aqueous hydrochloride acid at temperatures …
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Role of β-galactofuranose and β-glucan in Aspergillus nidulans hyphal cell wall ultrastructure and physical properties
The fungal cell wall is a first line of defence from the external environment or chemical treatments. Glucan, chitin and mannan are the main components of the Aspergillus nidulans hyphal cell wall. The sugar β-galactofuranose is a minor component of the cell wall and thought to be responsible for …
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The Localization of β-catenin During Xenopus Kidney Development: A Look into β-catenin's Role in Kidney Development
<p>Wnt signaling is a conserved cell communication system that drives embryonic development. Wnt pathways regulate a variety of developmental processes, including cell migration, proliferation, and fate determination. Dysregulation of Wnt signaling can lead to developmental disorders and diseases. …
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Nanoscale imaging and characterisation of Amyloid-β
In this work several novel Scanning Probe Microscopy (SPM) methods have been applied to the study of the amyloid peptide implicated in the pathogenesis of Alzheimer’s disease (AD). Amyloid-β (Aβ) undergoes a hierarchy of aggregation following a structural transition making it an ideal subject of …
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