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Silicon 1s Near Edge X-ray Absorption Fine Structure Spectroscopy of Functionalized Silicon Nanocrystals
(American Chemical Society, 2016)Silicon 1s Near Edge X-ray Absorption Fine Structure (NEXAFS) spectra of silicon nanocrystals have been examined as a function of nanocrystal size (3 – 100 nm), varying surface functionalization (hydrogen or 1-pentyl ... -
Systematic Investigation of π–π Interactions in Near-Edge X-ray Fine Structure (NEXAFS) Spectroscopy of Paracyclophanes
(2017)NEXAFS spectroscopy has potential for study of packing and order in organic materials but only if intermolecular effects are understood. This work studies how π–π interactions between adjacent unsaturated groups affect ... -
Connecting Molecular Conformation to Aggregation in P3HT Using Near Edge X-ray Absorption Fine Structure Spectroscopy
(American Chemical Society, 2017-10-11)Carbon 1s Near Edge X-ray Absorption Fine Structure (NEXAFS) and UV-vis spectroscopy are used to examine differences between highly aggregated and poorly aggregated forms of the polymer poly(3-hexylthiophene) (P3HT), based ... -
The wihkohtowin: Ritual Feasting among Cree and Métis Peoples in Northern Alberta
(University of Toronto Press, 2015) -
Temperature Dependence in the NEXAFS Spectra of n-Alkane
(American Chemical Society, 2018-11-16)The near edge X-ray absorption fine structure (NEXAFS) spectra of orthorhombic single crystals of n-octacosane (n-C28H58), recorded at room temperature (298 K) and at cryogenic temperatures (93 K), show distinct differences. ... -
Tracing molybdenum attenuation in mining environments using molybdenum stable isotopes
(American Chemical Society, 2019-04-18)Molybdenum contamination is a concern in mining regions worldwide. Better understanding of processes controlling Mo mobility in mine wastes is critical for assessing potential impacts and developing water-quality management ... -
Selenate removal by zero-valent iron under anoxic conditions: effects of nitrate and sulfate
(Springer Nature, 2019-08-16)Batch experiments were conducted to examine aqueous Se(VI) removal by zero-valent iron (ZVI) under anoxic conditions in the presence and absence of NO3− and SO42−. Initial concentrations for Se(VI), SO4, and NO3–N of 5 mg ... -
Putative mixotrophic nitrifying-denitrifying Gammaproteobacteria implicated in nitrogen cycling within the ammonia/oxygen transition zone of an oil sands pit Lake
(Frontiers, 2019-10-24)Anthropogenically-impacted environments offer the opportunity to discover novel microbial species and metabolisms, which may be undetectable in natural systems. Here, a combined metagenomic and geochemical study in Base ... -
Vanadium geochemistry of oil sands fluid petroleum coke
(American Chemical Society, 2017-02-09)Vanadium has previously been linked to elevated toxicity of leachates derived from oil sands petroleum coke. However, geochemical controls on V mobility within coke deposits remain poorly constrained. Detailed examinations ... -
Geochemical and mineralogical aspects of sulfide mine tailings
(Elsevier, 2015-01-30)Tailings generated during processing of sulfide ores represent a substantial risk to water resources. The oxidation of sulfide minerals within tailings deposits can generate low-quality water containing elevated concentrations ... -
The persistence of brines in sedimentary basins
(American Geophysical Union, 2018-05-08)Brines are commonly found at depth in sedimentary basins. Many of these brines are known to be connate waters that have persisted since the early Paleozoic Era. Yet questions remain about their distribution and mechanisms ... -
Chemical mass transport between fluid fine tailings and the overlying water cover of an oil sands end pit lake
(American Geophysical Union, 2017-05-17)Fluid fine tailings (FFT) are a principal by-product of the bitumen extraction process at oil sands mines. Base Mine Lake (BML)—the first full-scale demonstration oil sands end pit lake (EPL)—contains approximately 1.9 3 ... -
Dissolved selenium(VI) removal by zero-valent iron under oxic conditions: Influence of sulfate and nitrate
(American Chemical Society, 2017-04-17)Dissolved Se(VI) removal by three commercially-available zero-valent irons (ZVIs) was examined in oxic batch experiments under circumneutral pH conditions in the presence and absence of NO3- and SO42-. Environmentally ... -
Nickel geochemistry of oil sands fluid petroleum coke deposits, Alberta, Canada
(Canadian Science Publishing, 2018-04-30)Nickel (Ni) leaching from oil sands petroleum coke can have toxicological effects on aquatic organisms. However, geochemical controls on Ni release, transport and attenuation within coke deposits remains limited. We examined ... -
Linear Dichroism in the NEXAFS Spectra of n-Alkane Crystalline Polymorphs
(Elsevier, 2019-04)Linear Dichroism in Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy is a useful tool for studying molecular orientation and for clarifying spectroscopic assignments. n- Alkane molecules can form single ... -
Near Edge X-ray Absorption Fine Structure Spectra of Linear n- Alkanes: Variation with Chain Length
(Elsevier, 2019)The effect of chain length on the carbon 1s Near Edge X-ray Absorption Fine Structure (NEXAFS) spectra of linear n-alkanes has been examined with Transition Potential Density Functional Theory (TP-DFT) calculations. Species ... -
Builder Borders on Aboriginal Lands
(2019)During the nineteenth and early twentieth centuries, the United States and Canada expended significant effort demarcating and enforcing their shared border. The surveying process began in the east, transitioned to the ... -
Internal thermal boundary layer stability in phase transition modulated convection
(AGU, 1997-02)The stability of a horizontal thermal boundary layer embedded within a very viscous fluid is investigated using the formalism of linear stability analysis. Thin thermal boundary layers in deep fluid regions and in the ...
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