Index Catalog // ScholarsArchive@OSU

“Red Light, Yellow Light!”: Evaluating the Anti-Listerial Potential of Bacillus Isolate Metabolites Using a High-Throughput Chromogenic Assay”

Creator:: Johnson, Taylor S.
Abstract:: Listeria monocytogenes contamination continues to pose challenges for the food industry and there is demand for effective methods of food preservation and protection that can also be considered clean label. A promising source of antilisterial compounds may be sourced from bacteria that produce novel byproducts. Ribosomally synthesized and post-translationally modified...
Resource Type:: Masters Thesis

[9,10-methylene-¹⁴C] sterculic acid metabolism in the rat : urinary metabolites, liver tissue distribution, and induced [omega]-hydroxylase activity

Creator:: Eisele, Thomas Anthony
Abstract:: Corn oil (CO) and Sterculic foetida oil (SFO) fed rats were injected with [9, 10-methylene-¹⁴C]sterculic acid. Less than 1% of the label was expired as carbon dioxide. The majority of the label was excreted in the urine as short-chain dicarboxylic acids with an intact cyclopropane ring. The major metabolites for...
Resource Type:: Masters Thesis

A business feasibility tool for artisan cheese operation start-up

Creator:: Bouma, Andrea
Abstract:: The objective of this study was to develop a decision making tool to determine economic feasibility of artisan cheese operations. A survey of current Oregon artisan cheese companies was used to gain knowledge of the fixed and variable costs associated with cheese production and business start-up. The data from this...
Resource Type:: Masters Thesis

A comparison of porous polymers used in collecting organic volatiles in foods

Creator:: Boyko, Alayne Linda
Abstract:: Porapak Q, Chromosorb 102, and Tenax GC, three porous polymers commonly used as adsorbents in headspace analyses were investigated. The retention times of various low-boiling compounds relative to water were measured on the collection columns to determine which compounds would be lost during the water removal step employed after sampling...
Resource Type:: Masters Thesis

A Comprehensive Evaluation of the Nonvolatile Chemistry Affecting the Sensory Bitterness Intensity of Highly Hopped Beers

Creator:: Hahn, Christina
Abstract:: The range of different nonvolatile constituents extracted from hops in highly hopped beers suggests that iso-alpha acids may not be the sole contributor to beers’ bitterness. Among brewers producing hop-forward beer styles there is a growing concern that the Bitterness Unit (BU) is no longer an accurate predictor of beer...
Resource Type:: Masters Thesis

A filter paper assay for low cellulase activities and the cultivation of Trichoderma reesei on acid whey and sweet whey permeate

Creator:: Nordmark, Tor Soren
Abstract:: The traditional filter paper assay for saccharifying cellulase originally described by M. Mandels et al (1976) has been modified to make possible low activity determinations of Trichoderma cellulases. The enzymatic activity appears to decline during a prolonged incubation period if no precautions have been taken. By means of adding bovine...
Resource Type:: Masters Thesis

A guide to the fermentation and distillation of whey for potable spirit production

Creator:: Risner, Derrick
Abstract:: Whey is co-product of cheese production and is produced at 9:1 whey to cheese ratio. Whey is broadly classified into two types, sweet and acid whey. Large cheese manufacturers have developed whey processing techniques to convert sweet whey into value added products such as protein powders and emulsifiers. Acid whey...
Resource Type:: Masters Thesis

A maturity trial study of Pinot noir wines : aroma profile by sniffing gas chromatographic effluent

Creator:: Miranda-Lopez, Rita
Abstract:: The quality of wine is highly influenced by the weather. Temperature, solar radiation and humidity influence the formation and concentration of aroma-active compounds and aroma-active precursors in the grapes. Pinot noir grapes require a slow ripening, under cool temperatures, in order to achieve their fullest flavor. The main objective of...
Resource Type:: Masters Thesis

A method for the determination of the free fatty acids of Cheddar cheese

Creator:: Bills, Donald D.
Abstract:: The free fatty acids of Cheddar cheese are important components in the over-all flavor and aroma of the cheese. Although the more volatile fatty acids probably contribute most, there is reason to believe that the higher fatty acids may contribute, to some extent, in imparting typical flavor characteristics. Before the...
Resource Type:: Masters Thesis

A simulation tool for evaluating sensory data analysis methods

Creator:: Naini, Shuo
Abstract:: In cross-cultural studies, respondents from specific cultures may have different product preferences and scale usage. Combining data from different cultures will result in departures from the basic assumptions of analysis of variance (ANOVA) and loss of power in testing capability of finding product and culture differences. However, the result of...
Resource Type:: Masters Thesis

A study of factors affecting the efficiency of maturity separation of peas by sodium chloride brine flotation

Creator:: Chavasit, Visith
Abstract:: The problem in green pea grading system by using brine flotation is loss of some less mature peas (generally regarded as higher in quality and price) in the sinker fraction (lower quality). Green peas were sampled from the production line as follows: (1) blanched but ungraded peas, (2) floater fraction,...
Resource Type:: Masters Thesis

A study of factors affecting the extraction of flavor when dry hopping beer

Creator:: Wolfe, Peter Harold
Abstract:: This work set out to examine the methodologies of dry hopping, compare different hop materials, and look at the extraction behavior of different types of hop compounds. This work consists of two discrete studies, where the first study informed the design of the second. The first study measured the concentrations...
Resource Type:: Masters Thesis

A study of the DNA excision repair capabilities of rainbow trout (Salmo gairdneri) exposed to dietary cyclopropenoid fatty acids

Creator:: Collier, John Mark
Abstract:: The DNA repair capabilities of rainbow trout (Salmo gairdneri) were studied vising the method of autoradiography. Trout were fed a semi-purified control diet containing 0 ppm, 50 ppm, or 300 ppm cyclopropenoid fatty acids (CPFA) for 6-9 weeks. Liver slices were prepared and exposed in vitro to a control treatment,...
Resource Type:: Masters Thesis

Accumulation of dietary polychlorinated biphenyl by rainbow trout (Salmo gairdneri)

Creator:: Lieb, Andrew James
Abstract:: This study was conducted to investigate the accumulation of dietary polychlorinated biphenyls (PCB's) by a Mt. Shasta strain of rainbow trout (Salmo gairdneri). A commercial mixture of PCB's (Aroclor 1254) was added to the diet at a level of 15 ppm on a dry weight basis. Accumulation of PCB's was...
Resource Type:: Masters Thesis

Acid stabilization of autolyzed fish : storage and nutritional characteristics

Creator:: Culbertson, Jeffry Dean
Abstract:: The effects of ambient temperature storage on the chemical and nutritional characteristics of phosphoric and sorbic acid-stabilized fish autolysates were determined. Variations in sample composition due to autolysis, deboning, and acidification were also evaluated. Autolysates of English sole (Parophrys vetulus), true cod (Gadus macrocephalus), Dover sole (Microstomus pacificus), and orange...
Resource Type:: Masters Thesis

Actaldehyde production and utilization by lactic cultures

Creator:: Keenan, Thomas William
Abstract:: Acetaldehyde is known to be responsible for the green or yogurt-like flavor defect of lactic cultures. This study was undertaken to extend the knowledge of acetaldehyde production and utilization by microorganisms normally found in mixed-strain butter cultures. It is anticipated that the resulting information will contribute to a more thorough...
Resource Type:: Masters Thesis

Acute toxicity and carcinogenic activity of ochratoxin in rainbow trout (Salmo gairdneri)

Creator:: Doster, Robert Charles
Resource Type:: Masters Thesis

Adhesive property of bacteria and its relationship to microbial spoilage of shrimp

Creator:: Smith, John B.
Abstract:: Pacific shrimp (Pandalus jordani) was washed repeatedly and the eluted bacteria were enumerated and identified. Selected isolates were tested for their adhesive properties. Washing reduced the microbial load by 3.84 to 42.04%. The bacteria which most resisted wash-off were Staphylococcus and Pseudomonas spp. The easiest to wash off was Flavobacterium...
Resource Type:: Masters Thesis

Adsorption of selected charge mutants of bacteriophage T4 lysozyme at silanized silica surfaces

Creator:: Podhipleux, Nilobon
Abstract:: The adsorption kinetics exhibited by selected charge mutants of T4 lysozyme at silanized silica surfaces were monitored with in situ ellipsometry. Mutant lysozymes were produced by substitution of lysine (Lys) with glutamic acid (Glu). Each substitution resulted in a decrease in the net charge of the protein by 2 units....
Resource Type:: Masters Thesis

Alterations in growth, lipid metabolism and P:O ratios in mice fed Sterculia foetida oil

Creator:: Lehman, Michael Wesley
Abstract:: Cyclopropenoid fatty acids (CPFA) are natural components of cottonseed oil, a major food oil in the United States. The ability of CPFA to cause abnormal biochemical and physiological effects when fed to laboratory and farm animals has prompted an investigation of their effects on mice. Between 0.05 and 0.55% CPFA...
Resource Type:: Masters Thesis

Search Constraints

Search Results

Limit your search