High pressure (HP) processing has been emerging rapidly as a novel technique for non-thermal preservation of foods. Application of HP processing for shelf life extension of orange juice was the principal objective of the current research. To accomplish this objective, and to establish a scientific basis for HP processing of orange juice, a systemic approach was used which included the evaluation of: (a) HP inactivation kinetics of pectin methyl esterase (PME, the key enzyme in orange juice implicated with respect to quality changes), (b) destruction of spoilage microorganisms and changes in product quality, (c) HP process verification and finally, (d) storage studies on HP treated orange juice. / In preliminary studies, the effect of HP treatment on indigenous microorganisms, texture and color of selected fresh fruits and vegetables were evaluated. Results showed that HP had a significant effect on the destruction of microorganisms. Product texture and color were mildly affected, often resembling the appearance of mildly heat-treated products. / Pressure induced inactivation kinetics of pectin methyl esterase (PME) was investigated at pH 3.7 and 3.2 in freshly squeezed single strength (12.6°Brix) and concentrated (10--40° Brix) orange juice. Results showed a biphasic nature of pressure induced inactivation of PME in both juices. The first phase consisted of rapid change in inactivation of enzyme, designated as instantaneous pressure kill (IPK), due to pulse pressurization, followed by gradual inactivation of enzyme, characterized by a first order rate of inactivation during pressure hold-time. / Combination treatment involving pressure cycle, pressure level and pressure hold-time was then evaluated for inactivation of PME using a response surface methodology. Overall, pressure pulse had a lower effect on inactivation of PME compared to other factors. / Pressure destruction kinetics of Leuconostoc mesenteroides and Saccharomyces cerevisiae the spoilage organisms in orange juice, were then investigated. Pressure destruction kinetics followed the same dual effect behavior, as observed with PME inactivation. IPK effect increased with pressure cycles and was more pronounced with S. cerevisiae that Leu. mesenteroides. / Storage studies of HP treated single strength and concentrated orange juice were conducted at selected temperatures (4, 10 and 20°C). Results showed that treated juice was microbiologically stable from a few days to several weeks depending on type of juice, storage temperature and processing conditions. (Abstract shortened by UMI.)

No description available.

Phase II archaeological testing of the Wesley Chapel Gulf area was conducted in June and July 2004 by six Ball State Anthropology students, including the author, for the Hoosier National Forest. This fieldwork was aimed at assessing the significance of two sites, 120r382 and 120r384, located by the previous surveys. These two sites were considered potentially eligible for inclusion on the National Register of Historic Places because of the data they may provide.The purpose of the research is to determine how this unique natural feature was utilized by prehistoric cultures and to assess its role within the regional archaeological context. The research builds upon data recovered during the previous archaeological surveys of the land immediately surrounding the gulf and tests the conclusions of those investigations with recent data from two archaeological sites, 120r382 and 12Or384. Analysis of the cultural material recovered during the 2004 fieldwork illuminates the prehistory of the Wesley Chapel Gulf area and enhances the interpretation of its role in prehistoric settlement patterns within the Hoosier National Forest region. / Department of Anthropology

Foreclosures have increased in the US since the 1970’s. The increase in foreclosures has caused concern among some researchers on their affect on crime. Social disorganization theory measures the effect various structural characteristics, such as poverty, residential instability/mobility, racial/ethnic heterogeneity, and family disruption have on crime. This study, though, is concerned with residential instability/mobility, or the presence of foreclosed houses in neighborhoods. Although most studies using this theory look at low-income neighborhoods, the following research looks at middle- and upper-income neighborhoods, which have been greatly affected by foreclosures. The theory also argues that the level of collective efficacy can reduce crime even in neighborhoods that are otherwise considered to be socially disorganized. Using ArcGIS mapping, the following research investigated 30 neighborhoods in Orange County, Florida that have high foreclosures in neighborhoods for the years of 2005-2009. Canvasses were conducted in all 30 neighborhoods to measure the level of collective efficacy within the neighborhoods to help explain the presence of high or low residential burglary. Thirteen neighborhoods stood out as noteworthy because they fell at the far end of the spectrum – high foreclosures and high crime, and high foreclosures and low crime. Some of the neighborhoods with high residential burglary did have strong indicators of low collective efficacy, while neighborhoods with low residential burglary had indicators of high collective efficacy. The majority of the indicators found in this research support previous research on various indicators of collective efficacy

The purpose of this study is to determine if the industrial arts and vocational education program of the Orange Public Schools is meeting the needs of the pupils, parents, and industries of the community.

Governments often used the promise of land as a means to implement policy. Whether the land was in the form of a large grant to a successful explorer, or in the offer of a homestead on the frontier, the motive for such grants was seldom entirely altruistic. Most grants contained stipulations for settlement and cultivation because a growing population was necessary for economic development. Rulers of Florida also offered land grants to encourage a particular religion, to protect shipping, or to establish protection against Indian attacks. When Florida became part of the United States, large sections of the territory were already claimed under various land grants made by Spain or Great Britain. Succeeding United States governments continued to grant land to individuals or companies to stimulate internal improvements or to increase population. In the hands of developers, land grants usually had the desired effect, but in the hands of speculators they tended to decrease population growth. The purpose of this paper is to examine the effect of land grants on population growth in Orange County, Florida.

published_or_final_version / Ecology and Biodiversity / Doctoral / Doctor of Philosophy

The effect of refluxing on the aromas of Valencia aqueous orange essences was determined through analysis by GC, MS, Osme, and by a descriptive panel. The strengths and descriptions of volatiles were investigated to determine if differences in essence aroma character and intensity existed. During production, 1 sample was subjected to reflux conditions and contained 16.2% ethanol. The other sample had not been refluxed and contained 6% ethanol. The aroma activity of volatiles was measured by Osme, a method of gas chromatography / olfactometry developed at Oregon State University. The majority of aroma active peaks were found to be present in the reflux and no reflux aqueous orange essence samples. Octanal, linalool, ethyl butanoate and 2 unknowns were the components with strongest aroma activities in both samples. Descriptive analysis was conducted with 7 trained panelists from the Food Science and Technology Department at Oregon State University. Following 12 training sessions, initial testing indicated overall intensity was the major separating attribute of essences. After 6 additional training sessions and adjustment of concentrations to yield essences of approximate equal strength, testing indicated there were no significant differences between samples. Osmegrams, GC FID chromatograms, and descriptive analysis indicated the effect of reflux produced an essence that was more concentrated. Although refluxing concentrated individual volatiles to different levels, character differences other than those associated with concentration were minimal. / Graduation date: 1996

Three orange cultivar trials have been established in Arizona, one at the Yuma Mesa Agricultural Center, Yuma, AZ and one at the Citrus Agriculture Center, Waddell, AZ. For the navel orange trial in Yuma, 'Fisher' navel continues to have the greatest yield, but is unacceptably granulated. For the 'Valencia' trial in Yuma, none of the cultivar/rootstock combinations have been particularly successful. For the Waddell trial, only the first year data has been collected.

Call number: LD2668 .T4 1957 M70 / Master of Science