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 157 for “"Sulfoxide"”.
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Sulfoxide Catalyzed Dehydrative Glycosylation. Reaction Development and Mechanistic Analysis
A sulfoxide-catalyzed dehydrative glycosylation for the coupling of carbohydrate hemiacetals and nucleophilic alcohols has been developed. In this procedure, a glycosyl hemiacetal is treated with the reagent combination of benzenesulfonic anhydride and a substoichiometric amount of n-butyl …
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Methionine Sulfoxide Reductase and Ubiquitin-dependent Degradation of Alpha-synuclein
… dopamine and 14-3-3 levels in the methionine sulfoxide reductase A (MsrA) knockout mouse brain, as well as decreased αSyn degradation in MsrA KO yeast cells. Hence, this study will focus on the interactions among MsrA, αSyn degradation, 14-3-3 proteins, and Ub. Here we show that msrA …
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Diffusion of dimethyl sulfoxide in aqueous mixtures and polyelectrolyte gels
… coefficients, D<sub>BULK</sub>, of dimethyl sulfoxide (DMSO) were measured in free (“bulk”) aqueous mixtures by the capillary method using sulfur-35 labeled DMSO. The value of D<sub>BULK</sub> was found to pass through a minimum at approximately 33 mole percent DMSO as DMSO concentration was …
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Characterization of a unique sulfoxide synthase found in pathogenic trypanosomes
Includes abstract. Includes bibliographical references.
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Asymmetric allylic C–H functionalization via palladium(II)/sulfoxide-oxazoline catalysis
… Alternatively, the oxidatively stable bis-sulfoxide ligand has shown to promote general reactivity with broad scope. However, its underlying mechanism, known as “serial ligand catalysis”, is challenging for asymmetric catalysis, due to the highly dynamic and fluxional binding environment of …
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NMR study of peptide derivatives in cryoprotective media and dimethyl sulfoxide
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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Antibiotic Effects of Dimethyl Sulfoxide and Synthetic Polyphenols on E. Coli Cells
… study is to determine the effect of dimethyl sulfoxide on the cellular uptake of synthetic polyphenols. Three synthetic polyphenols (Phenol Red, Congo Red, and Bromophenol Blue) were tested for their antibiotic properties and compared to the antibiotic activity of curcumin. Our results show …
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I. Transannular Sulfoxide - Ketone Interaction. Ii. A Prospectus of the Vancomycin Structure
Made available in DSpace on 2014-12-05T19:38:02Z (GMT). No. of bitstreams: 1 6206166.pdf: 4399515 bytes, checksum: c7ff8da0afe1b70c28dc46e03a1d12fa (MD5) Previous issue date: 1962
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The development of Pd(II)sulfoxide-oxazoline catalyzed allylic C—H functionalizations
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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Palladium (II) / sulfoxide - promoted strategies for efficient and selective allylic C-H oxidations
… improved chemical efficiency. Palladium(II) / sulfoxide catalysis has demonstrated broad applicability toward a wide array of allylic C–H functionalizations, starting from abundant and simple α-olefins. The development of such transformations has been classically guided by the reaction’s serial …
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Some effects of dimethyl sulfoxide on absorption, translocation, and membrane permeability in plants
The influence of DMSO (dimethyl sulfoxide) on foliar absorption and translocation of herbicides and plant membrane permeability was investigated. Primary leaves of bean (<i>Phaseolus vulgaris</i> L., var. Black Valentine) were treated with ¹⁴C-labeled DMSO, 3,6-dicholoro-<u>o</u>-anisic acid …
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Free methionine sulfoxide reductase and its contributions to environmental stress response in Komagataeibacter hansenii
… In this thesis, the role of free methionine-R-sulfoxide reductase (MsrC) was investigated through comparative analysis of the wildtype (WT) K. hansenii, an msrC-deficient mutant (ΔmsrC), and a complemented strain using the shuttle plasmid pUCD2. The ΔmsrC mutation greatly affects growth, …
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The Effects of Dimethyl Sulfoxide on the Mutagenic Action of Ethyl Methanesulfonate in Drosophila Melanogaster
… and injury due to alkylating agents. Dimethyl sulfoxide (DMSO) provides an effective protection against the mutagenic effects of radiation in many organisms including Drosophila. The major objective of this study was to determine the effects that topical application of DMSO would have on the …
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Characterization of a carbon source-dependent, phytohormone-responsive, free methionine-(R)-sulfoxide reductase from Komagataeibacter hansenii
… functional role of a putative free methionine sulfoxide reductase (MsrC) was characterized using a knockout mutant. The growth of the mutant was greatly affected by the presence of ethylene, abscisic acid and indole-3-acetic acid while oxidative stress increased BC production. Fructose-grown …
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Kinetics of alkali metal ion self-exchange on polystyrene sulfonate resin in dimethyl sulfoxide-water media
… have been measured over a range of dimethyl sulfoxide (DMSO)-water mixtures from 0 to 70 mole % DMSO. Interpretation of results is simplified by the choice of this system which exhibits relatively constant resin swelling, fairly high dielectric constant and virtually no solvent preference …
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High Pressure Nmr Studies of the Dynamics of Fluids and Fluid Mixtures (Supercritical, Dimethyl-Sulfoxide, Diffusion)
This thesis deals with several related but specific projects which examine the transport and relaxation properties of a number of fluids and fluid mixtures as a function of temperature and pressure. The common denominator of these projects is the use of pressure as an essential variable in studies …
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The synthesis and characterization of new sulfoxide complexes of ruthenium and their potential as anti-cancer agents
… (3) (the figure [in actual abstract] shows the sulfoxide structures) were previously used as precursors for the synthesis of Ru(II)-sulfoxide-nitroimidazole complexes. The structural chemistry and spectroscopic data of Ru/DMSO/TMSO complexes are reviewed. RuCl₂(TMS̲O)₄, previously assigned a …
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Methionine: oxidation state in processed foods and enzyme-catalyzed reaction with adenosine triphosphate
… set of conditions for measurement of methionine sulfoxide in food proteins. Recoveries of methionine, methionine sulfoxide, and methionine sulfone from base-hydrolyzed amino acid mixtures were, respectively, 89, 100, and 105% with the 2M NaOH conditions and 83, 90, and 98% with the 3M NaOH …
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