Index Catalog // ScholarsArchive@OSU

An Examination of Factors Controlling the Activity of Ammonia- and Nitrite-oxidizers in Diverse Soils

Creator:: Giguere, Andrew T.
Abstract:: Nitrification is a critical step in the global nitrogen cycle involving the biological oxidation of ammonia (NH₃) to nitrite (NO₂⁻ ) and then to nitrate (NO₃⁻). The first step in nitrification is carried out by NH₃-oxidizing bacteria (AOB) and archaea (AOA), and the second by NO₂⁻-oxidizing bacteria (NOB). In addition...
Resource Type:: Dissertation
Full Text:: Andrew T. Giguere for the degree of Doctor of Philosophy in Soil Science presented on March 20, 2017

Contributions of ammonia-oxidizing bacteria and archaea to nitrification in forest soils

Creator:: Lu, Xinda
Abstract:: Prior to 2005, ammonia oxidation, the first step of nitrification, was thought mediated mainly by ammonia-oxidizing bacteria (AOB). However, the discovery of Thaumarchaeota carrying the genes coding for the ammonia monooxygenase (AMO) enzyme led to the discovery that ammonia-oxidizing archaea (AOA) also contribute to nitrification. Despite the uptick in studies...
Resource Type:: Masters Thesis
Full Text:: people: Anne Taylor, Andrew Giguere, Kristin Kasschau, Fumiaki Funahashi, Rachel Danielson. I also

Impact of Dairy Manure Digestate on Microbial Activities in Soil

Creator:: Waggoner, Ashley L
Abstract:: Amendments and fertilizers applied to optimize crop production and improve soil health also supply inputs of soil organic matter (SOM) and nutrients that affect soil microorganisms. In the dairy-intensive Pacific Northwest, dairy manure is stored as slurry mixtures until conditions are appropriate for soil application. During storage, the manure begins...
Resource Type:: Dissertation
Full Text:: ; Erguder et al., 2009; Giguere et al., 2015; Gubry- Rangin et al., 2017, 2011; Hatzenpichler, 2012; Taylor

Cloning and characterization of GRASP, a novel retinoic acid-induced gene from P19 embryonal carcinoma cells

Creator:: Nevrivy, Daniel
Abstract:: Retinoic acid (RA) exerts important effects in the processes of vertebrate development, cellular growth and differentiation, and homeostasis. However, the mechanisms of action of RA in the control of cellular and developmental processes are incompletely understood, as the retinoid target genes have not been fully characterized. The goal of these...
Resource Type:: Dissertation
Full Text:: vitamin A for all its functions (Giguere 1994). Thus, RA is believed to act as the primary active

Transcriptome Responses of the Nitrifying Bacteria Nitrosomonas europaea and Nitrobacter hamburgensis to Low Oxygen

Creator:: Dobie, Michael
Abstract:: Nitrification is the process within the global Nitrogen Cycle where ammonia (NH3) is oxidized to nitrate (NO₃⁻) and can be carried out by two distinct groups of bacteria. The ammonia-oxidizing bacteria (AOB) first oxidize NH₃ to nitrite (NO₂⁻), and second, the nitrite-oxidizing bacteria (NOB) oxidize NO₂⁻ to NO₃⁻. In aerobic...
Resource Type:: Masters Thesis
Full Text:: process. It was there I met Dr. Anne Taylor, PhD student Andrew Giguere and members of the Dr

Seeking primary care in Oregon : utilization of the emergency room services in a Salem hospital

Creator:: Young, Elizabeth A.
Abstract:: This thesis examines how changes made to the Oregon Health Plan (OHP) in 2003 impacts those now utilizing the emergency room (ER) for primary health care. This thesis also examines how these changes impact staff members working in the ER of Salem Hospital. Through the utilization of qualitative research methods,...
Resource Type:: Masters Thesis

Diversity and Activity of Microbial Extracellular Peptidases in Soil

Creator:: Nguyen, Trang T. H.
Abstract:: Soil nitrogen exists largely as organic matter, including plant liter, dead animal matter, and microbial necromass. About 90% of soil organic nitrogen is proteinaceous material that is too large for plants and microorganisms to assimilate directly. Protein depolymerization therefore plays a critical role in mobilizing this organic source of nitrogen,...
Resource Type:: Dissertation
Full Text:: Waggoner, Christopher Burgess, Stephany Chacon, Josh Neuman, Rachel Danielson, Nate Tisdell, Andrew

Scaling, ash-driven bistability, and other agents of soilscape genesis discovered while digitally mapping soils of the Blue Mountains, Oregon

Creator:: Almquist, Vance Warner
Abstract:: This dissertation reports on four related, though separate projects. The first project details the process of carrying out a digitally augmented soil mapping (DSM) effort alongside an ongoing survey in Oregon's Ochoco National Forest (ONF) using a Random Forest algorithm. The second chapter describes a initial soil survey in Oregon's...
Resource Type:: Dissertation
Full Text:: , Antra Bǒca, Astrid Jacobson, Janis Boettinger, Andrew Giguere, Ryan Hill, Clint Mattox, Pedro Martinez

Mechanisms of Organic Matter Accumulation and Feedbacks on Pore Space in Ferralsols/Oxisols Containing High Carbon Stocks

Creator:: Martinez, Pedro
Abstract:: Deeply weathered soils in tropical rainforests and savannas are classified as Ferralsols according to the World References Bases for Soil Resources (WRB). Ferralsols are most nearly akin to the Oxisols order defined in the US Soil Taxonomy. The acidity, low cation exchange capacity, and strong phosphorus retention by the oxidic...
Resource Type:: Dissertation
Full Text:: , Stephany Chacon, Andrew Giguere, Clara Weidman, Kris Osterloh, Trang Nguyen, Burl Carpenter, Fumiaki

Response of Soil Microbially Mediated Nutrient Cycling and Community Structure to Timber Harvest in the Pacific Northwest

Creator:: Danielson, Rachel E.
Abstract:: Forest harvest persists as one of the most globally important industries, and crucially provides raw wood products for both building and fuel materials. Mechanistically complex abiotic and biotic processes curb ecosystem recovery following timber harvest and it is of great importance to understand the effects of this practice on biogeochemical...
Resource Type:: Masters Thesis
Full Text:: -shooting that came with it. Fellow grad students Fumiaki Funahashi, Trang Nguyen, Nate Tisdell, Andrew

ScholarsArchive@OSU

An Examination of Factors Controlling the Activity of Ammonia- and Nitrite-oxidizers in Diverse Soils

Contributions of ammonia-oxidizing bacteria and archaea to nitrification in forest soils

Impact of Dairy Manure Digestate on Microbial Activities in Soil

Cloning and characterization of GRASP, a novel retinoic acid-induced gene from P19 embryonal carcinoma cells

Transcriptome Responses of the Nitrifying Bacteria Nitrosomonas europaea and Nitrobacter hamburgensis to Low Oxygen

Seeking primary care in Oregon : utilization of the emergency room services in a Salem hospital

Diversity and Activity of Microbial Extracellular Peptidases in Soil

Scaling, ash-driven bistability, and other agents of soilscape genesis discovered while digitally mapping soils of the Blue Mountains, Oregon

Mechanisms of Organic Matter Accumulation and Feedbacks on Pore Space in Ferralsols/Oxisols Containing High Carbon Stocks

Response of Soil Microbially Mediated Nutrient Cycling and Community Structure to Timber Harvest in the Pacific Northwest

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