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 38 for “"organosulfur"”.
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Predicting organosulfur chemistry in fuel sources
… this provides a basis for the investigation of organosulfur chemistry with tighter uncertainty.
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Synthesis and reactivity of organosulfur iron complexes
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1984.
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The preparation of organosulfur derived electron transfer salts
The concept of this thesis is to effect greater control over the crystalline state of radical cation salts in order to enhance electron transport, and to allow for the incorporation of additional functionality such as optical activity or magnetism. The salts formed are based on the …
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Elucidation of the Various Mechanisms of Antioxidant Activity of Organosulfur Compounds
… oxidative degradation. The mechanisms by which organosulfur compounds act as antioxidants are often described as ‘secondary antioxidants’ since it is believed that they slow the rate of radical initiation by decomposing hydroperoxides. Organosulfurs also figure in various natural products from …
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The powerful combination of novel organosulfur methodology and continuous flow technology
… to deliver powerful transformations based on organosulfur chemistry. The main objective of this work was the synthesis of key building-blocks for biologically relevant compounds coupled with the use of Process Analytical Technologies (PAT), to gain critical mechanistic insight and …
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Novel synthetic methodology employing organosulfur chemistry in the synthesis of chalcone derivatives
Highly functionalised a-thio-b-chloroenones are extremely useful synthetic intermediates. Their formation through a N-chlorosuccinimide (NCS) mediated chlorination cascade is a powerful synthetic methodology which transforms an unreactive sp3 b-carbon into a highly reactive sp2 …
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An investigation into the anti-cancer mechanism of garlic-related organosulfur compounds
Crushed garlic contains organosulfur compounds (OSC), which are reported to have cancer chemotherapeutic properties both in vitro and in vivo. A library of 15 organosulfur analogues were obtained as mechanistic probes in WHCO1 oesophageal cancer cells. Structure-activity studies showed a positive …
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Oxidation and hydrolysis reactions in supercritical water : chlorinated hydrocarbons and organosulfur compounds
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1995.
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Synthesis of new substituted organosulfur donors for the preparation of conductive and multifunctional materials
The work presented in this thesis focused on the preparation of three main type of compounds: i) bridged dimeric BEDT-TTF donors (chapter 2), ii) enantiopure substituted EDT-TTF donors with hydrogen bonding functionalities (chapter 3) and iii) BEDT-TTF substituted ligands and their ability to form …
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The effect of acetoacetate, organosulfur compounds and hormones on the activity of the liver mitochondria
The mitochondrial utilization of a-ketoglutaric and pyruvic acids have been found to be depressed in guinea pig and bovine ketosis. Addition of sodium acetoacetate to the reaction medium resulted in depressed oxidation of pyruvate and 1-ketoglutarate of isolated normal rat liver mitochondria.
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Elucidating Concentration and Temperature-dependent Energy Limitations of a Novel Fluorinated-organosulfur Catholyte for Li Primary Batteries
Increasing the energy density of Lithium (Li) primary batteries requires exploring novel electrochemical reactions. Herein, the novel Li–carbon cell with a liquid catholyte based on the reactant 4-nitrophenylsfur (NO₂-Ph-SF₅) is studied in detail with emphasis on its energy limitations under …
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Electrochemical Detection of Aliphatic Sulfur Compounds in Liquid Coal Extracts
… chemical desulfurization process. The kinds of organosulfur compounds in coal are generally known, but the quantity of each type of compound and the distribution of these compounds throughout the coal matrix has not been studied extensively. The objective of this research was to investigate the …
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The immunomodulatory effects of the garlic organosulfur compounds allicin and Z-ajoene in an in vitro murine model of LPS-induced inflammation
… garlic contains many bioactive compounds, garlic organosulfur compounds (OSCs) have been most widely studied for their anti-cancer properties. In this study, we hypothesize that garlic OSCs modulate the inflammatory immune response by downregulating pro-inflammatory while stimulating …
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A COMPUTATIONAL STUDY ON BIOCHEMICAL REACTIONS OF SULFUR-CONTAINING COMPOUNDS
… the reaction of a free thiol and garlic-derived organosulfur compounds. The thesis has 7 main chapters. Chapter 1 introduces the two sulfur-containing systems and the objectives of the studies. Chapter 2 describes the theoretical methods and models. Chapter 3 presents a novel 3D model of the …
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The Chemistry of Tetraoxypersulfuranes and Their Precursors
… I), the first example of a hexacoordinate organosulfur (VI) derivative lacking fluorine ligands, a sulfone bisketal, was synthesized by treatment of bis{2-(1-hydroxy-
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MASS SPECTROMETRIC STUDIES ON PETROLEUM ASPHALTENES AND ORGANOSULFUR COMPOUNDS, ON FUNCTIONAL-GROUP SELECTIVE ION-MOLECULE REACTIONS AND ON GAS-PHASE REACTIVITY OF META-BENZYNES TOWARD AMINO ACIDS
Mass spectrometry has found a wide variety of applications in many fields of study, such as fundamental chemistry, biological science, food and fuels, advanced materials, etc. Due to its high sensitivity, selectivity and speed, mass spectrometry provides an invaluable tool for direct mixture …
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Unravelling the impacts of palaeoecology, palaeoenvironment and lithofacies on sedimentary organic NSO compounds
… compounds containing more than 40 carbon atoms. Organosulfur compounds, as inorganic-organic incorporation products during early diagenesis, were characterized in extracts of the aforementioned lacustrine and marine samples to obtain both palaeoecological and palaeoenvironmental information. The …
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Organic Sulfur-Bearing Species as Subsurface Carbon Storage Vectors
… to reveal molecular compositions of complex organosulfur compounds in such oils. Sulfurized compounds including C20-28, C35 and C40 species were detected with double bond equivalent values suggesting the occurrence of sulfurized lipids. Laboratory sulfurization experiments on lipids yielded …
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Scanning electrochemical microscopy with conducting polymer probes: Validation and applications
… of the new electrode. Additionally, an organosulfur compound was used as mediator taking advantage of the electrocatalytic effect PEDOT and its resistance to fouling from S-derived species. Finally, these probes were also applied for ionic imaging in the absence of a redox mediator, …
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