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Articles 31 - 34 of 34
Full-Text Articles in Physical Sciences and Mathematics
Magnesium And Acidified Ethanol Based Treatment Systems For The Extraction And Dechlorination Of Polychlorinated Biphenyls From Contaminated Oils, Paints, And Soils, Simone Novaes-Card
Magnesium And Acidified Ethanol Based Treatment Systems For The Extraction And Dechlorination Of Polychlorinated Biphenyls From Contaminated Oils, Paints, And Soils, Simone Novaes-Card
Electronic Theses and Dissertations
Polychlorinated biphenyls (PCBs) are a class of environmentally persistent halogenated organic compounds that were once used as stabilizers to improve the properties of a variety of materials such as lubricants, heat transfer fluids, paints, and caulking materials. PCBs are also capable of migration through processes such as spillage into soils, leaching into groundwater, and volatilization into the atmosphere. Although banned in 1979 over health concerns, PCBs persist in these materials to this day because they are resistant to biotic degradation and natural weathering processes. The wide variety of contaminated materials means that many existing treatment options cannot be used across …
Early Transition Metal Ccc-Nhc Pincer Complexes: Synthesis, Characterization, And Catalysis, Theodore Rudy Helgert
Early Transition Metal Ccc-Nhc Pincer Complexes: Synthesis, Characterization, And Catalysis, Theodore Rudy Helgert
Electronic Theses and Dissertations
The previously reported amine elimination methodology for the metalation of CCC-NHC pincer ligand precursors has been extended to other early-transition metals and ligands. Specifically, synthetic results for the preparation of imidazole based CCC-NHC pincer Ti (IV), CCC-NHC pincer Ta (V) will be discussed. In addition, the synthesis of a new triazole based CCC-NHC pincer ligand precursor and its metalation with Ta (V) will be presented. Coordination sphere manipulation of the new pincer complexes using TMSCl for the Ti complex and lithium t-butylamide for the Ta complexes is also discussed. The reaction of the initial Ta CCC-NHC complex with lithium t-butylamide …
Chemometric Applications To A Complex Classification Problem: Forensic Fire Debris Analysis, Erin Waddell
Chemometric Applications To A Complex Classification Problem: Forensic Fire Debris Analysis, Erin Waddell
Electronic Theses and Dissertations
Fire debris analysis currently relies on visual pattern recognition of the total ion chromatograms, extracted ion profiles, and target compound chromatograms to identify the presence of an ignitable liquid. This procedure is described in the ASTM International E1618-10 standard method. For large data sets, this methodology can be time consuming and is a subjective method, the accuracy of which is dependent upon the skill and experience of the analyst. This research aimed to develop an automated classification method for large data sets and investigated the use of the total ion spectrum (TIS). The TIS is calculated by taking an average …
Novel Optical Properties Of Metal Nanostructures Based On Surface Plasmons, Haining Wang
Novel Optical Properties Of Metal Nanostructures Based On Surface Plasmons, Haining Wang
Electronic Theses and Dissertations
Surface plasmons have been attracted extensive interests in recent decades due to the novel properties in nanometer sized dimensions. My work focused on the novel optical properties of metal nanostructures based on surface plasmons using theoretical simulation methods. In the first part, we investigated metal nanofilms and nanorods and demonstrated that extremely low scattering efficiency, high absorption efficiency and propagation with long distance could be obtained by different metal nanostructures. With a perforated silver film, we demonstrated that an extremely low scattering cross section with an efficiency of less than 1% can be achieved at tunable wavelengths with tunable widths. …