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Physical Sciences and Mathematics Commons™
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Articles 1 - 3 of 3
Full-Text Articles in Physical Sciences and Mathematics
Variation Of Organic Matter Quantity And Quality In Streams At Critical Zone Observatory Watersheds, Matthew P. Miller, Elizabeth W. Boyer, Diane M. Mcknight, Michael G. Brown, Rachel S. Gabor, Carolyn T. Hunsaker, Lidiia Iavorivska, Shreeram Inamdar, Dale W. Johnson, Louis A. Kaplan, Henry Lin, William H. Mcdowell, Julia N. Perdrial
Variation Of Organic Matter Quantity And Quality In Streams At Critical Zone Observatory Watersheds, Matthew P. Miller, Elizabeth W. Boyer, Diane M. Mcknight, Michael G. Brown, Rachel S. Gabor, Carolyn T. Hunsaker, Lidiia Iavorivska, Shreeram Inamdar, Dale W. Johnson, Louis A. Kaplan, Henry Lin, William H. Mcdowell, Julia N. Perdrial
College of Arts and Sciences Faculty Publications
The quantity and chemical composition of dissolved organic matter (DOM) in surface waters influence ecosystem processes and anthropogenic use of freshwater. However, despite the importance of understanding spatial and temporal patterns in DOM, measures of DOM quality are not routinely included as part of large-scale ecosystem monitoring programs and variations in analytical procedures can introduce artifacts. In this study, we used consistent sampling and analytical methods to meet the objective of defining variability in DOM quantity and quality and other measures of water quality in streamflow issuing from small forested watersheds located within five Critical Zone Observatory sites representing contrasting …
Zirconium-Catalyzed Alkene Hydrophosphination And Dehydrocoupling With An Air-Stable, Fluorescent Primary Phosphine, Christine A. Bange, Neil T. Mucha, Morgan E. Cousins, Abigail C. Gehsmann, Anna Singer, Taylor Truax, Lee J. Higham
Zirconium-Catalyzed Alkene Hydrophosphination And Dehydrocoupling With An Air-Stable, Fluorescent Primary Phosphine, Christine A. Bange, Neil T. Mucha, Morgan E. Cousins, Abigail C. Gehsmann, Anna Singer, Taylor Truax, Lee J. Higham
College of Arts and Sciences Faculty Publications
Zirconium-catalyzed alkene hydrophosphination and dehydrocoupling with an air-stable, fluorescent primary phosphine 8-[(4-phosphino)phenyl]-4,4-dimethyl-1,3,5,7-tetramethyl-2,6-diethyl- 4-bora-3a,4a-diaza-s-indacene furnishes fluorescent phosphine products. Hydrophosphination of the fluorescent phosphine produces products with a complete selectivity for the secondary product. A key intermediate in catalysis, a zirconium phosphido compound, was isolated.
Studies On Hydroxyl Radical Formation And Correlated Photoflocculation Process Using Degraded Wood Leachate As A Cdom Source, Luni Sun, Kenneth Mopper
Studies On Hydroxyl Radical Formation And Correlated Photoflocculation Process Using Degraded Wood Leachate As A Cdom Source, Luni Sun, Kenneth Mopper
Chemistry & Biochemistry Faculty Publications
In this study, we examined hydroxyl radical (•OH) formation with respect to photoreactivity of colored dissolved organic matter (CDOM), the Fenton reaction, and photoflocculation using leachate from decaying wood. The relationship between •OH photoproduction rate and leachate optical properties (UV-visible absorption and fluorescence excitation-emission matrices (EEMS)) was studied during irradiation using a UV solar simulator. The results showed that the •OH photochemical formation rate is strongly related to humic-like fluorescence as characterized by parallel factor analysis (PARAFAC), and that these fluorescence components are more photolabile than most of the other CDOM components. Fourier transform infrared spectroscopy (FT-IR) indicated the photodegradation …