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 24 for “"Oxidizing agents"”.
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The purification of semi-chemical pulping waste by aeration
… waste with and without the addition of chemical oxidizing agents and biological seeds. The results of this investigation show that the 5-day B.O.D. of semi-chemical kraft pulping waste was lowered from 24 to 31 percent by forty-eight hours of aeration at 20°C. without the addition of chemical …
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Synthesis and reactions of antimony allyloxides
… of Sb(OR)3 and SbMe(OR) 2 with multiple oxidizing agents were attempted in order to obtain the corresponding Sb(V) oxo compounds. The synthesis and reactions with oxidizing agents are discussed along with the relevance of this research to the heterogeneous oxidation process.
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Alpha-Oxygenation by Acylation-Rearrangement of Nitrones
… are quite mild, and the use of electrophilic oxidizing agents is obviated.
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STABILITY AND SPECTROSCOPIC PROPERTIES OF NEGATIVE IONS
… in chemistry as building blocks of salts and oxidizing agents. Halogen atoms, due to their ability to attract electrons, readily form negative ions. Considerable interest exists in the design and synthesis of new negative ions called superhaogens whose electron affinities are much higher than …
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Structural effects of chloraminated seawater on the SW30HR reverse osmosis membrane
… conducted to determine the effect of secondary oxidizing agents formed from the reactions of monochloramine with bromide and iodide on membrane structure. Membrane coupons were exposed to varying concentrations of monochloramine (2, 20 and 200 mg/L as Cl2) in synthetic seawater containing …
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Deoxyribose oxidation chemistry and endogenous DNA adducts
… one that provides a means to compare different oxidizing agents. This method exploits the reaction of aldehyde- and ketone-containing deoxyribose oxidation products with 14C-methoxyamine to form stable oxime derivatives that are quantified by accelerator mass spectrometry. Sensitive GC/MS …
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ALKYLATION AND OXIDATIONS OF SYMMETRICAL DIMETHYLENEBIPHENYL AND RELATED DIANIONS (CYCLOPHANE, BIPHENYLOPHANE, NMR, CONFORMATION).
… shift of the ortho hydrogens was developed. Many oxidizing agents were evaluated for the oxidation of the dianion from 2,3-dimethyl-1,3-butadiene to 1,2,5,6-tetramethylenecyclooctane; cupric bromide was found to be the best.
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Experimental and DFT study on selective oxidation of 5-Hydroxymethyl furfural over cadmium sulfide catalyst
… the effect of different solvents, different oxidizing agents, different catalysts for HMF oxidation is investigated. CdS catalysts show excellent selectivity towards oxidation of HMF into FFCA in presence of DMSO and TBHP oxidizing agent. Binding energy of HMF on CdS surface is calculated for …
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Development of an analytical method to quantify the oxidative deoxyribose damage product 3'-phosphoglycolaldehyde induced by radiation, iron and peroxynitrite
… of cells are caused by exogenous and endogenous oxidizing agents and may contribute to diseases such as cancer. To better understand the role of oxidative DNA damage in these diseases, it is necessary to quantify deoxyribose oxidation both in vitro and in vivo. Current methods lack the …
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The Thiol Specific Antioxidant (TSA1) Gene is Required for Survival in Macrophages and Oxidative Stress Resistance in Histoplasma Capsulatum
… macrophages and heightened sensitivity to the oxidizing agents paraquat dichloride and hydrogen peroxide. Flow cytometry of these treated cells strained with the intercellular REDOX indicator dye CM-H<sub>2</sub>DCFDA shows approximately 2.1 to 3.7 fold greater fluorescence intensity than wild …
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Proteomics in Nasal Lavage Fluids from Persulfate Challenged Hairdressers
… asthma and rhinitis. Persulfate salts, which are oxidizing agents present in bleaching powder, are considered to be important causal agents for these symptoms. The underlying mechanisms are unclear and efficient tools for risk assessment and diagnosis are scarce. The general aim of this thesis was …
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An investigation of the reaction kinetics of photocatalytic wastewater treatment using suspended titanium dioxide catalyst
… of hydroxyl radicals - one of the most oxidizing agents known in environmental chemistry - which easily attack all types of organic pollutants found in wastewater. However, while this process seems very promising, there are no standard design parameters to accurately model and predict …
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Catalytic, low temperature oxidation of methane into methanol over copper-exchanged zeolites
… of methane require harsh solvents, need exotic oxidizing agents, or deactivate easily. Copper-exchanged zeolites have emerged as candidates for methanol production due to high methanol selectivity (> 99%), utilization of oxygen, and low reaction temperature (423-473 K). Despite these advantages, …
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The removal of color and DOC from segregated dye waste streams using ozone and Fenton's reagent followed by biotreatment
… of reactive dye-containing waste streams using oxidizing chemicals and the determination of the effect of the oxidizing agents on the subsequent biotreatment of the streams was investigated. Three oxidizing schemes were chosen for study: molecular ozone, base-promoted ozonation, and Fenton’s …
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Leaching of selected PGMs : a thermodynamic and electrochemical study employing less aggressive lixiviants
… into the dissolution of the PGMs using different oxidizing agents. The dissolution of gold on the other hand has been afforded extensive research, and numerous papers and review articles have been published on the subject. The last number of years has seen the biggest application by volume of the …
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Defining the role of endonuclease VIII-like 1 and 3 in the repair of interstrand crosslinks in cancer cells
… are unusually sensitive to DNA crosslinking agents and it is now known that FA cells lack one of twenty-two known different FA complementation group (FANC) proteins involved in the repair of DNA interstrand crosslinks (ICLs). More recently, two DNA glycosylases (endonuclease VIII – like 1 & 3 …
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The relation of soil characteristics and chemical constituents of soil solutions to the self corrosion of underground lead cable
… approach of oxygen difficult. The presence of oxidizing agents, such as the nitrates, also enhances corrosion. The nature of soil corrosion on cable sheath is usually that of a crater-like pitting of the surface. In these pits are found the corrosive products, probably lead salts in the form of …
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Volatile organic compounds in seawater
… by zooplankton or photochemically-produced oxidizing agents may produce the aldehydes, since laboratory cultures of phytoplankton did not produce these oxygenated volatiles. An alkene, structurally similar to the known benthic algal gamone, fucoserraten, was also found in Vineyard Sound …
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Hydrometallurgical processing of nickel sulfides with activated carbon in sulfuric acid medium
… using inorganic acids, organic ligands, and oxidizing agents. The initial leaching experiments established that effective metal dissolution requires strongly acidic and oxidative environments. Sulfuric acid was selected as the principal lixiviant due to its industrial relevance, while ferric …
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New high nuclearity carbonyl clusters
… the above with a stoichiometric defect of a mild oxidizing agents such as [M(H2O)x]n+ aquo complexes possessing different pKa’s and Mn+/M potentials. The experimental results are roughly in keeping with the conclusion that aquo complexes featuring E°(Mn+/M) < ca. -0.20 V do not lead to the …
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