Index Catalog // ScholarsArchive@OSU

Interactions between microbial dynamics, water flow, and solute transport in unsaturated porous media

Creator:: Yarwood, Rockie R.
Abstract:: Bioremediation in the vadose zone is unpredictable because of poor understanding of factors influencing microbial growth in this environment. A lab-scale experimental system was developed to examine, noninvasively, interactions between microbial growth, water flow, and solute transport in unsaturated porous media. Measurements of microbial colonization, and its impact on hydrology,...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Rockie R. Yarwood for the degree

Evaluation of physical and thermal methods to support nonlinear cost optimization models of surimi seafood

Creator:: Hsü, Cheng-kuang
Abstract:: Optimization programming techniques were applied to develop the least cost formulations for Pacific whiting surimi-based seafood (PWSBS). To develop the quality constraint functions, texture and color of whiting surimi gels were determined by torsion test and colorimeter, respectively. Whiting surimi gels were produced by heating at 90°C for 15 min....
Resource Type:: Dissertation
Full Text:: Abstract approved: Edward R. Kolbe Optimization programming techniques were applied to develop the

An investigation of carbon and nitrogen metabolism through a genomic analysis of the genus Nitrobacter

Creator:: Starkenburg, Shawn R.
Abstract:: The chemolithoautotrophic nitrite oxidizing bacteria (NOB) participate in the biogeochemical cycling of nitrogen by catalyzing and conserving energy from the oxidation of nitrite (NO₂-) to nitrate (NO₃-) via a nitrite oxidoreductase (NXR). The main objective of this work was to comparatively annotate and analyze the genome sequences of Nitrobacter winogradskyi...
Resource Type:: Dissertation
Full Text:: OF THE DISSERTATION OF Shawn R. Starkenburg for the degree of Doctor of Philosophy in Microbiology

Analysis of flavor precursors in radish and radish color extracts

Creator:: Kucza, Myriam M.
Abstract:: Radish anthocyanin extract has potential as a natural colorant because of its pigment stability and attractive red hue. Presence of undesirable aroma compounds could limit its applications in foods. The pungent principle of radish, 4-methylthio-3-butenyl isothiocyanate (MTBI), is produced enzymatically upon cell injury from its glucosinolate precursor, 4-methylthio-3-butenyl glucosinolate (MTBG),...
Resource Type:: Masters Thesis
Full Text:: like to thank my committee members: Dr. Mina R. McDaniel, Dr. Dan J. Arp and Dr. William Braunworth

Community composition and activities of denitrifying bacteria in soils

Creator:: Rich, Jeremy J.
Abstract:: Few studies have directly compared denitrifying community composition and activities in soils by coupling molecular-genetic techniques and traditional measures of denitnfication. I investigated communities of denitrifying bacteria from adjacent meadow and forest soils in the Cascade Mountains, Oregon. A key gene in the denitrification pathway, N₂O reductase (nosZ), served as...
Resource Type:: Dissertation
Full Text:: ) .......................................................................... 25 2.4. Top-ten correlation coefficients (Pearson's r-value) between nosZ T-RFs and NMS axes one or

Toward understanding the nature of the soil microsite in relation to nitrogen and carbon cycling

Creator:: Cliff, John B.
Abstract:: My research has focused on understanding N and C cycling in soils at small scales. Isotope dilution methods commonly used to estimate gross rates of soil chemical transformations assume homogeneous distribution of label. I explored the effects of diffusion limitations on isotope dilution experiments in soil aggregates using spherical diffusion-reaction...
Resource Type:: Dissertation
Full Text:: support, and for allowing me enough rope to hang myself. I also thank Dr. Daniel J Arp, Dr. Roy Haggerty

An evaluation of factors influencing the management of Otiorhynchus sulcatus (F.) (Coleoptera: Curculionidae)

Creator:: Kepler, Ryan M.
Abstract:: The black vine weevil (BVW), Otiorhynchus sulcatus (F.) (Coleoptera: Curculionidae) is a persistent pest of nursery operations in the United States, feeding on over 140 species of plants. The goals of this research were to 1) assess the behavioral response of BVW to a commonly employed insecticide bifenthrin (Talstar 0.2G®)...
Resource Type:: Masters Thesis
Full Text:: . The importation of R. cardinalis sparked the development of what has subsequently become known as

Cometabolic degradation of polycyclic aromatic hydrocarbons (PAHs) and aromatic ethers by phenol- and ammonia-oxidizing bacteria

Creator:: Chang, Soon Woong
Abstract:: Cometabolic biodegradation processes are potentially useful for the bioremediation of hazardous waste sites. In this study the potential application of phenol-oxidizing and nitrifying bacteria as "priming biocatalysts" was examined in the degradation of polycyclic aromatic hydrocarbons (PAHs), aryl ethers, and aromatic ethers. We observed that a phenol-oxidizing Pseudomonas strain cometabolically...
Resource Type:: Dissertation
Full Text:: Tank- and Sequencing Batch Reactors. Soon W. Chang, Tae J. Lee, Michael R. Hyman, Daniel J. Arp

Improving the nutritional and textural properties of dairy products by feeding Holstein cows processed flaxseed

Creator:: Oeffner, Scott P.
Abstract:: There is growing public concern about the high proportion of saturated fatty acids in milk fat; however, feed intake, energy partitioning toward milk synthesis, and milk fat concentrations can decrease when cows are fed high concentrations of unsaturated lipids. The objective of this study was to identify the optimal rate...
Resource Type:: Masters Thesis

Inhibition, gene expression and modeling of ammonia oxidation in biofilms of Nitrosomonas europaea

Creator:: Lauchnor, Ellen Grace
Abstract:: This dissertation explores the physiology and gene expression of the ammonia-oxidizing bacterium Nitrosomonas europaea in surface-associated bacterial communities, or biofilms. Biofilms of N. europaea were cultivated in drip flow reactors for several weeks and gene expression microarrays were used to detect 240 genes differentially expressed between the mature biofilms and...
Resource Type:: Dissertation

ScholarsArchive@OSU

Interactions between microbial dynamics, water flow, and solute transport in unsaturated porous media

Evaluation of physical and thermal methods to support nonlinear cost optimization models of surimi seafood

An investigation of carbon and nitrogen metabolism through a genomic analysis of the genus Nitrobacter

Analysis of flavor precursors in radish and radish color extracts

Community composition and activities of denitrifying bacteria in soils

Toward understanding the nature of the soil microsite in relation to nitrogen and carbon cycling

An evaluation of factors influencing the management of Otiorhynchus sulcatus (F.) (Coleoptera: Curculionidae)

Cometabolic degradation of polycyclic aromatic hydrocarbons (PAHs) and aromatic ethers by phenol- and ammonia-oxidizing bacteria

Improving the nutritional and textural properties of dairy products by feeding Holstein cows processed flaxseed

Inhibition, gene expression and modeling of ammonia oxidation in biofilms of Nitrosomonas europaea

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