Index Catalog // ScholarsArchive@OSU

Arsenic methylation by marine cyanobacteria Prochlorococcus and Synechococcus

Creator:: Lee, Mikaela
Abstract:: Our experiments aimed to investigate responses of the marine cyanobacteria Prochlorococcus and Synechococcus to toxic arsenic species, such as arsenate, and to understand cellular mechanisms that contribute to arsenic tolerance. We used two strains of Prochlorococcus, a high-light adapted MED4 and low-light adapted MIT9313, both axenic, for cultivation experiments. For...
Resource Type:: Honors College Thesis
Full Text:: _____________________________________________________________________ Kimberly Halsey, Committee Member, representing Microbiology

The Effects of Toxicity Inhibitors on the Cytotoxicity of Cryoprotective Agents using a High-Throughput Experimental Set-up

Creator:: Ampo, Emi
Abstract:: Even with advanced medical technology, there is still an unmet need for organs to reduce the transplant waiting list and to advance organ-related research. Cryopreservation through vitrification is one possible solution to increase organ availability. A major challenge with cryopreservation of organs is the toxicity of the cryoprotectants (CPAs) that...
Resource Type:: Honors College Thesis
Full Text:: _____________________________________________________________________ Kimberly Halsey, Committee Member, representing Microbiology Department

Characterization of Spoilage Events on Flavored Milk Products by Paenibacillus odorifer

Creator:: Torres, Alejandro
Abstract:: Flavored milk is a growing category for dairy products; however, it is a perishable product that is subject to microbial spoilage which can lead to a negative consumer experience and lead to lost sales. Flavored milk processors communicated unique spoilage events related to their products, including color loss of strawberry...
Resource Type:: Masters Thesis
Full Text:: made it without you. Thank you. To my three committee members Mike Penner, Kimberly Halsey and

Diversity and distribution of bacterial symbionts in Vesicomyid clams along the Cascadia Margin

Creator:: Robinson, Hannah R.
Abstract:: Deep-sea chemosynthetic ecosystems remain a frontier in marine science. Essential to their role in the ocean ecosystem are endosymbiotic bacteria which support larger megafauna, including the widespread symbiont-bearing Vesicomyid clams. The diversity and characteristics of these symbionts in these clams is only just beginning to be understood with technological advances...
Resource Type:: Honors College Thesis
Full Text:: _____________________________________________________________________ Kimberly Halsey, Committee Member, representing Microbiology

Strain-specific effects of the herbicide RoundUp on diverse natural isolates of Saccharomyces cerevisiae

Creator:: Taggard, Savannah K.
Abstract:: The safety of the chemical glyphosate, the active ingredient in the herbicide RoundUpTM, has been questioned on numerous occasions. Previous studies suggest that glyphosate-containing herbicides have deleterious effects on a variety of organisms; other studies suggest that these effects may be minor, transient, or non-existent altogether. Proper maintenance of microbial...
Resource Type:: Honors College Thesis
Full Text:: _____________________________________________________________________ Kimberly Halsey, Committee Member, representing Department of Microbiology

Species- and Temporal-Specific Coral Microbiome Fluctuations in Response to a Natural Bleaching Event

Creator:: Ewton, Erica M.
Abstract:: Corals provide a diversity of ecosystem services, are among the most biologically diverse ecosystems on Earth, and directly support ~500 million people globally; however, corals are increasingly experiencing significant threats and are undergoing severe bleaching events as the result of the warming climate. Using a two-year data set surrounding a...
Resource Type:: Masters Thesis

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

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:: . Additionally, their support in the laboratory was critical to my success. Thank you to Dr. Kimberly Halsey

Important Considerations for Food Process Validations : Strain Selection, Contamination Level, and Relevant Treatment Conditions

Creator:: Pearson, Eva
Abstract:: Reports of foodborne outbreaks have increased in the last decade, posing a public health risk to consumers. In an attempt to mitigate this risk, the newly established Food Safety and Modernization Act (FSMA) takes a preventive rather than reactive approach to food safety. Under FSMA, producers are required to validate...
Resource Type:: Masters Thesis

Ammonia-oxidizer and denitrifier populations in boreal forest soils of differing nitrogen availability

Creator:: Burton, Marci S.
Abstract:: Nitrification and denitrification are major biological processes transforming nitrogen (N) in soils to plant available N, highly leachable nitrate (NO₃⁻) and gaseous N oxides. Although many studies in the past have studied N cycling communities, the effect of increased N inputs on ammonia-oxidizer and denitrifier population dynamics is still under...
Resource Type:: Masters Thesis
Full Text:: me mentally and not being shy with a word of encouragement. I thank Jeff Hatten and Kimberly

ScholarsArchive@OSU

Arsenic methylation by marine cyanobacteria Prochlorococcus and Synechococcus

The Effects of Toxicity Inhibitors on the Cytotoxicity of Cryoprotective Agents using a High-Throughput Experimental Set-up

Characterization of Spoilage Events on Flavored Milk Products by Paenibacillus odorifer

Diversity and distribution of bacterial symbionts in Vesicomyid clams along the Cascadia Margin

Strain-specific effects of the herbicide RoundUp on diverse natural isolates of Saccharomyces cerevisiae

Species- and Temporal-Specific Coral Microbiome Fluctuations in Response to a Natural Bleaching Event

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

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

Important Considerations for Food Process Validations : Strain Selection, Contamination Level, and Relevant Treatment Conditions

Ammonia-oxidizer and denitrifier populations in boreal forest soils of differing nitrogen availability

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