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• 61. [Article] Seasonal Dynamics of Methane Pathways Along a Hydrogeomorphic Peatland Gradient

  Northern peatlands occupy a very small proportion of the Earth’s surface but contain nearly a third of the world’s soil organic carbon. These wetland systems produce substantial fluxes of CH4, a potent ...

  Citation × Citation Citation Abstract Copy Title: Seasonal Dynamics of Methane Pathways Along a Hydrogeomorphic Peatland Gradient Author: McAllister, Steven Year: 2016 Northern peatlands occupy a very small proportion of the Earth’s surface but contain nearly a third of the world’s soil organic carbon. These wetland systems produce substantial fluxes of CH4, a potent greenhouse gas, and are expected to experience particularly high annual mean temperature increases as global climate change proceeds, which could result in a significant positive feedback. Using radioisotope labeling, we quantified the rates of two pathways of CH4 production in six sites in northern Michigan along a physiochemical and ecological gradient that characterizes northern peatlands. We found that the rates of these two pathways displayed markedly different dynamics in space and time and that the hydrogenotrophic pathway, previously presumed to be less significant in these systems, can increase substantially and become dominant across the landscape when water tables are high. Quantifying these two pathways provides critical insight into understanding dynamics of CH4 production in northern peatlands. Title: Seasonal Dynamics of Methane Pathways Along a Hydrogeomorphic Peatland Gradient Author: McAllister, Steven Year: 2016 Northern peatlands occupy a very small proportion of the Earth’s surface but contain nearly a third of the world’s soil organic carbon. These wetland systems produce substantial fluxes of CH4, a potent greenhouse gas, and are expected to experience particularly high annual mean temperature increases as global climate change proceeds, which could result in a significant positive feedback. Using radioisotope labeling, we quantified the rates of two pathways of CH4 production in six sites in northern Michigan along a physiochemical and ecological gradient that characterizes northern peatlands. We found that the rates of these two pathways displayed markedly different dynamics in space and time and that the hydrogenotrophic pathway, previously presumed to be less significant in these systems, can increase substantially and become dominant across the landscape when water tables are high. Quantifying these two pathways provides critical insight into understanding dynamics of CH4 production in northern peatlands. Close

• 62. [Article] Analyzing Early Embryonic Cell Division Defects in Caenorhabditis Elegans

  36 pages. A thesis presented to the Department of Biology and the Clark Honors College of the University of Oregon in partial fulfillment of the requirements for degree of Bachelor of Science, Spring 2...

  Citation × Citation Citation Abstract Copy Title: Analyzing Early Embryonic Cell Division Defects in Caenorhabditis Elegans Author: Krishnakumar, Sheetal Year: 2014 36 pages. A thesis presented to the Department of Biology and the Clark Honors College of the University of Oregon in partial fulfillment of the requirements for degree of Bachelor of Science, Spring 2014. Title: Analyzing Early Embryonic Cell Division Defects in Caenorhabditis Elegans Author: Krishnakumar, Sheetal Year: 2014 36 pages. A thesis presented to the Department of Biology and the Clark Honors College of the University of Oregon in partial fulfillment of the requirements for degree of Bachelor of Science, Spring 2014. Close

• 63. [Article] Fire and Ice: Regulating Methane Hydrate as a Potential New Energy Source

  24 pages

  Citation × Citation Citation Abstract Copy Title: Fire and Ice: Regulating Methane Hydrate as a Potential New Energy Source Author: Jackson, Erin Year: 2014 24 pages Title: Fire and Ice: Regulating Methane Hydrate as a Potential New Energy Source Author: Jackson, Erin Year: 2014 24 pages Close

• 64. [Article] Thermo-acidophilic Algae: pH and Metal Tolerances

  The class Cyanidiophyceae (the "cyanidia") includes three genera, the walled Cyanidium and Galdieria and the "naked" Cyandioschyzon. All of these algae are unicellular and asexual and live at high temperature ...

  Citation × Citation Citation Abstract Copy Title: Thermo-acidophilic Algae: pH and Metal Tolerances Author: Lowell, Christina Year: 2012 The class Cyanidiophyceae (the "cyanidia") includes three genera, the walled Cyanidium and Galdieria and the "naked" Cyandioschyzon. All of these algae are unicellular and asexual and live at high temperature and low pH. The cyanidia grow optimally at a pH of 2-3 but can tolerate a higher pH and lower their surrounding pH if it is above the optimal level. They can also tolerate high concentrations of potential toxins that are often found in their natural environments. This thesis shows that strains of cyanidia from Yellowstone National Park and other geographic locations have differing abilities to lower their surrounding pH and tolerate environmental toxins that are found in many environments in which they live. These unique characteristics of this class of algae allow them to be optimally adapted for life in extreme environments with few competitors. This thesis includes unpublished co-authored material. Title: Thermo-acidophilic Algae: pH and Metal Tolerances Author: Lowell, Christina Year: 2012 The class Cyanidiophyceae (the "cyanidia") includes three genera, the walled Cyanidium and Galdieria and the "naked" Cyandioschyzon. All of these algae are unicellular and asexual and live at high temperature and low pH. The cyanidia grow optimally at a pH of 2-3 but can tolerate a higher pH and lower their surrounding pH if it is above the optimal level. They can also tolerate high concentrations of potential toxins that are often found in their natural environments. This thesis shows that strains of cyanidia from Yellowstone National Park and other geographic locations have differing abilities to lower their surrounding pH and tolerate environmental toxins that are found in many environments in which they live. These unique characteristics of this class of algae allow them to be optimally adapted for life in extreme environments with few competitors. This thesis includes unpublished co-authored material. Close

• 65. [Article] Investigation of Secondary Coordination Sphere Effects for Cyanohydrin Hydration with Transition Metal Catalysts

  The synthesis of high value acrylic monomers is currently done industrially via cyanohydrin hydration using concentrated acids, resulting in large quantities of useless byproducts. This current process ...

  Citation × Citation Citation Abstract Copy Title: Investigation of Secondary Coordination Sphere Effects for Cyanohydrin Hydration with Transition Metal Catalysts Author: Knapp, Spring Melody Year: 2012, 2014 The synthesis of high value acrylic monomers is currently done industrially via cyanohydrin hydration using concentrated acids, resulting in large quantities of useless byproducts. This current process is energy intensive and lacks atom economy; therefore, alternative cyanohydrin hydration strategies are under investigation. Ideally, cyanohydrin hydration would be done using organometallic nitrile hydration catalysts. Cyanohydrin hydration with these catalysts is challenging, because it needs to be done at low temperatures and under acidic conditions to reduce cyanohydrin degradation and catalyst poisoning with cyanide. This dissertation describes the reactivity of [Ru(#951; Title: Investigation of Secondary Coordination Sphere Effects for Cyanohydrin Hydration with Transition Metal Catalysts Author: Knapp, Spring Melody Year: 2012, 2014 The synthesis of high value acrylic monomers is currently done industrially via cyanohydrin hydration using concentrated acids, resulting in large quantities of useless byproducts. This current process is energy intensive and lacks atom economy; therefore, alternative cyanohydrin hydration strategies are under investigation. Ideally, cyanohydrin hydration would be done using organometallic nitrile hydration catalysts. Cyanohydrin hydration with these catalysts is challenging, because it needs to be done at low temperatures and under acidic conditions to reduce cyanohydrin degradation and catalyst poisoning with cyanide. This dissertation describes the reactivity of [Ru(#951; Close

• 66. [Article] Technology Encounters Tradition: Evaluating the Water Pasteurization Indicator in China

  76 pages

  Citation × Citation Citation Abstract Copy Title: Technology Encounters Tradition: Evaluating the Water Pasteurization Indicator in China Author: Linde, Alayna Year: 2013 76 pages Title: Technology Encounters Tradition: Evaluating the Water Pasteurization Indicator in China Author: Linde, Alayna Year: 2013 76 pages Close

• 67. [Article] PASSIVE DESIGN IMPLICATIONS DERIVED FROM CLIMATE ANALYSIS FOR VARIOUS LOCATIONS

  5 p.

  Citation × Citation Citation Abstract Copy Title: PASSIVE DESIGN IMPLICATIONS DERIVED FROM CLIMATE ANALYSIS FOR VARIOUS LOCATIONS Author: Brown, G. Z., Novitski, B. J. Year: 2011, 1980 5 p. Title: PASSIVE DESIGN IMPLICATIONS DERIVED FROM CLIMATE ANALYSIS FOR VARIOUS LOCATIONS Author: Brown, G. Z., Novitski, B. J. Year: 2011, 1980 5 p. Close

• 68. [Article] Initial Characterization of the Organophosphate Acid Anhydrase Activity of the Chicken, Gallus domesticus

  Supernatant solutions from kidney and liver homogenates of the chicken, Gallus domesticus, were found to hydrolyze the organophosphate (OP) compound diisopropylfluorophosphate (DFP). The activity on DFP ...

  Citation × Citation Citation Abstract Copy Title: Initial Characterization of the Organophosphate Acid Anhydrase Activity of the Chicken, Gallus domesticus Author: Westra, Brian, Landis, Wayne Year: 2010, 1992 Supernatant solutions from kidney and liver homogenates of the chicken, Gallus domesticus, were found to hydrolyze the organophosphate (OP) compound diisopropylfluorophosphate (DFP). The activity on DFP as substrate was heat-inactivated and was characterized for temperature and pH optima, enzyme kinetics, and requirements for manganous ion. Gel column chromatography indicated that the DFPase in both tissues is in the range of 82,100 to 93,300 D. This activity is strongly inhibited by N,N'-diisopropylphosphorodia-midofluoridate (mipafox). The chicken has organophosphate acid (OPA) anhydrase activity comparable to other eucaryotic sources in its ability to hydrolyze DFP. Although birds may not have paraoxonase activity comparable to mammalian species, they do not differ significantly in the ability to hydrolyze DFP and probably related compounds. Title: Initial Characterization of the Organophosphate Acid Anhydrase Activity of the Chicken, Gallus domesticus Author: Westra, Brian, Landis, Wayne Year: 2010, 1992 Supernatant solutions from kidney and liver homogenates of the chicken, Gallus domesticus, were found to hydrolyze the organophosphate (OP) compound diisopropylfluorophosphate (DFP). The activity on DFP as substrate was heat-inactivated and was characterized for temperature and pH optima, enzyme kinetics, and requirements for manganous ion. Gel column chromatography indicated that the DFPase in both tissues is in the range of 82,100 to 93,300 D. This activity is strongly inhibited by N,N'-diisopropylphosphorodia-midofluoridate (mipafox). The chicken has organophosphate acid (OPA) anhydrase activity comparable to other eucaryotic sources in its ability to hydrolyze DFP. Although birds may not have paraoxonase activity comparable to mammalian species, they do not differ significantly in the ability to hydrolyze DFP and probably related compounds. Close

• 69. [Article] Climate Communications and Behavior Change: A Guide for Practitioners

  54 p. : col. ill.

  Citation × Citation Citation Abstract Copy Title: Climate Communications and Behavior Change: A Guide for Practitioners Author: Climate Leadership Initiative, Pike, Cara, Doppelt, Bob, Herr, Meredith Year: 2010 54 p. : col. ill. Title: Climate Communications and Behavior Change: A Guide for Practitioners Author: Climate Leadership Initiative, Pike, Cara, Doppelt, Bob, Herr, Meredith Year: 2010 54 p. : col. ill. Close

• 70. [Article] An Overview of Potential Economic Costs to New Mexico of a Business-As-Usual Approach to Climate Change

  vi, 46 p. "A Report from The Program on Climate Economics, Climate Leadership Initiative, Institute for a Sustainable Environment, University of Oregon."

  Citation × Citation Citation Abstract Copy Title: An Overview of Potential Economic Costs to New Mexico of a Business-As-Usual Approach to Climate Change Author: Climate Leadership Initiative, Niemi, Ernest G., Buckley, Mark, Neculae, Cleo, Reich, Sarah Year: 2010, 2009 vi, 46 p. "A Report from The Program on Climate Economics, Climate Leadership Initiative, Institute for a Sustainable Environment, University of Oregon." Title: An Overview of Potential Economic Costs to New Mexico of a Business-As-Usual Approach to Climate Change Author: Climate Leadership Initiative, Niemi, Ernest G., Buckley, Mark, Neculae, Cleo, Reich, Sarah Year: 2010, 2009 vi, 46 p. "A Report from The Program on Climate Economics, Climate Leadership Initiative, Institute for a Sustainable Environment, University of Oregon." Close