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LSU Historical Dissertations and Theses

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Essays On Panel Unit Root Procedures: Applications To The Convergence Hypothesis, Ppp And Ucip., Kenan Lopcu Jan 1998

Essays On Panel Unit Root Procedures: Applications To The Convergence Hypothesis, Ppp And Ucip., Kenan Lopcu

LSU Historical Dissertations and Theses

The first two essays in this dissertation deal with the empirical examination of growth, specifically with the reexamination of convergence. The first essay introduces the issue and provides the preliminary results. Most of the empirical studies on the determinants of economic growth use cross-country analysis, employing long-term averages of relevant variables on each country. In these studies a negative relationship between average growth rates and initial incomes is interpreted as an indication of convergence in cross-country incomes and therefore, presented as evidence in support of neoclassical growth models. Such an analysis, however, ignores dynamic information that can explain part of …

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Evaluating The Impacts Of Farmer Participation In The Wetland Reserve Program On The Louisiana Economy Using I-O, Sam, And Cge As Alternative Modeling Techniques., Williams Olubodunde Olatubi Jan 1998

Evaluating The Impacts Of Farmer Participation In The Wetland Reserve Program On The Louisiana Economy Using I-O, Sam, And Cge As Alternative Modeling Techniques., Williams Olubodunde Olatubi

LSU Historical Dissertations and Theses

In the U.S., wetlands are one of the resources that have been adversely affected by development in agriculture. In response, and in order to protect wetlands as vital environmental resource, the federal government initiated several agriculture-related environmental protection programs, such as swamp buster, the Conservation Reserve Program (CRP), and the Wetlands Reserve Program (WRP). The WRP is an incentive-based program designed to encourage farmers to reconvert appropriate cropland to wetlands through subsidy payments. Because land is withdrawn from agricultural production, regions with relatively high participation rates, such as Louisiana, could experience adverse economic impacts from the program. As of August …

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Effects Of Anesthesia And Potential Antispastic Agents In An Experimental Model Of Spasticity., Heather Colleen Mosser Jan 1998

Effects Of Anesthesia And Potential Antispastic Agents In An Experimental Model Of Spasticity., Heather Colleen Mosser

LSU Historical Dissertations and Theses

Spasticity is a common motor disorder in spinal cord injured-patients. Therapeutic agents used to treat the motor abnormalities exist but are often unsatisfactory. Tests of potential pharmacotherapies are routinely conducted in anesthetized intact or acutely spinal animals, conditions which do not accurately simulate the human situation. The purpose of this dissertation was to develop, validate and use the chronic spinal rat as a model of spasticity that closely approximates the human spastic syndrome to evaluate antispastic agents. The main goals of this research project were to: (1) demonstrate the development of spasticity in the chronic spinal rat; (2) determine effects …

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Questions About Behavioral Function (Qabf): A Behavioral Checklist For Functional Assessment Of Aberrant Behavior., Theodosia Renata Paclawskyj Jan 1998

Questions About Behavioral Function (Qabf): A Behavioral Checklist For Functional Assessment Of Aberrant Behavior., Theodosia Renata Paclawskyj

LSU Historical Dissertations and Theses

Functional assessment is a tool in behavior therapy used to identify the functional relationships between a behavior of interest and the individual's environment. A functional assessment identifies variables that both occasion and maintain a particular behavior. Traditional functional assessment methodologies have relied on experimental techniques in which analog sessions are designed to mimic situations in the individual's environment. However, these techniques are time-consuming, require extensive training, and rely on the availability of numerous resources in the individual's setting. Development of a brief functional assessment checklist would circumvent these difficulties and make a significant contribution to applied behavioral psychology. The proposed …

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Modeling And Optimal Design Of Spiral-Wound Membrane Systems For Gas Separations., Runhong Qi Jan 1998

Modeling And Optimal Design Of Spiral-Wound Membrane Systems For Gas Separations., Runhong Qi

LSU Historical Dissertations and Theses

Membrane system economics can be significantly affected by process modeling and design. Available spiral-wound permeator models are difficult to use for process design because of their mathematical complexity and high computational demands. Existing sequential design methods yield suboptimal flowsheets when multiple permeation stages are required. In this dissertation, more effective modeling and design techniques for spiral-wound systems separating binary and multicomponent gas mixtures are developed. An approximate modeling approach based on the assumption that the residue flow rate is constant in the direction of bulk permeate flow is proposed. This assumption allows a significant simplification of basic transport models which …

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An Investigation Of Worry And Its Relationship To Anxiety In A Non-Clinical Sample Of Adolescents., Denise Adair Powers Jan 1998

An Investigation Of Worry And Its Relationship To Anxiety In A Non-Clinical Sample Of Adolescents., Denise Adair Powers

LSU Historical Dissertations and Theses

The overall purpose of this study was to examine the relationship between worry and anxiety in a community sample of adolescents. As no psychometrically sound instruments for measuring parameters of worry in adolescents exist, the first purpose of this study was to devise a reliable and valid measure of worry for this population. The Worry Inventory for Adolescents (WIA) was administered to 606 adolescents between the ages of 11 and 18. Based on the factor analysis, the WIA was divided into twelve factors and yielded two scores, Number of Worries and Worry Severity. The WIA demonstrated good internal consistency, moderate …

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Prevention Of Hydrolytic And Oxidative Rancidity And Nutrient Losses In Rice Bran During Storage., Fatemeh Malekian Ramezanzadeh Jan 1998

Prevention Of Hydrolytic And Oxidative Rancidity And Nutrient Losses In Rice Bran During Storage., Fatemeh Malekian Ramezanzadeh

LSU Historical Dissertations and Theses

Freshly milled raw rice bran was stabilized with microwave heat for 3 min. Half of raw and treated bran were packed in Ziplock(c) bags and the other half vacuum packed. Half of the samples were stored at 4--5°C and the other half at 25°C for 16 weeks. The free fatty acid (FFA) content increased rapidly in raw rice bran samples vacuum packed and samples packed in Ziplock(c) bags store at 25°C from an initial amount of 2.5% to 54.3% and 48.1%, respectively. FFA level increased significantly in raw samples vacuum packed and packed in Ziplock (c) bags stored 4--5°C from …

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Facilitating Knowledge Integration And Flexibility: The Effects Of Reflection And Exposure To Alternative Models., Lewis Garnet Roussel Jr Jan 1998

Facilitating Knowledge Integration And Flexibility: The Effects Of Reflection And Exposure To Alternative Models., Lewis Garnet Roussel Jr

LSU Historical Dissertations and Theses

Three experiments investigated the effect of various kinds of reflection (within-task and post-task reflection) on learning a process control task. Also, two ways of providing learners with alternative ideas about task behavior, exposure to other's ideas and providing hints for task solution, were examined. The task involved a simulated "sugar production factory" in which the learners sought to control sugar production by manipulating workforce size. It was predicted that combining within-task reflection with exposure to alternative task ideas would lead to superior task performance through integration of experiential and reflective knowledge. Contrary to the prediction, within-task reflection consistently interfered with …

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Understanding Performance Differences In Small Family Firms: A Resource-Based View., Janet Baulos Runge Jan 1998

Understanding Performance Differences In Small Family Firms: A Resource-Based View., Janet Baulos Runge

LSU Historical Dissertations and Theses

This dissertation examined the resource-based view of the firm to explain performance differences among family businesses. How do resources impact strategy and performance in the family firm and what resources are important to strategy and performance in the family firm were the primary research questions. Hypothesized relationships between reputation and financial resources, between human resources, financial resources, and physical resources and strategic perspective, and between strategic perspective and performance were tested in sample of family owned/operated retail jewelry stores. Structural equation modeling (LISREL 8) was used to develop a measurement model and structural model to test the patterns of relationships …

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The Portrait Of A Psyche: Women's Underworld Journeys In Four Modern American Novels., Kristen Sifert Jan 1998

The Portrait Of A Psyche: Women's Underworld Journeys In Four Modern American Novels., Kristen Sifert

LSU Historical Dissertations and Theses

Drawing from James Hillman's psychological reading of myth, this study traces the emergence of the ancient myth of Psyche in Henry James's The Portrait of a Lady, Caroline Gordon's The Women on the Porch, William Faulkner's Light in August, and Toni Morrison's Beloved. From the perspective of modern divisions, the novelists look forward to the wholeness of Psyche's reunion with Eros and the assumption of the mortal woman, yet their immediate focus is the transformative journey through the underworld. James elaborates the mythical impact of money; like the coins Psyche pays Charon, who detaches her from a sense of her …

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Significance Of The Effect Of Nitrogen Application On The Engineered Bioremediation Of Crude Oil In A Salt Marsh., Paul Timothy Tate Jan 1998

Significance Of The Effect Of Nitrogen Application On The Engineered Bioremediation Of Crude Oil In A Salt Marsh., Paul Timothy Tate

LSU Historical Dissertations and Theses

The biodegradation of the crude oil in a salt marsh was monitored by tracking the decline of the ratio of various components in the crude oil to a stable marker, hopane. In studies of mesocosms, addition of nitrogen as ammonium nitrate resulted in more rapid biodegradation of the oil at 0.10 significance. In field plots, addition of nitrogen was found to not significantly increase the rate of oil degradation over the rate in the control plots. The degradation of the oil is best described by a first order decay equation. The kinetic rate parameter k was 0.0054/day in the control …

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Remediation And Retention Of Students On First-Time Scholastic Drop (R&R)., Dee Anna Slavant Jan 1998

Remediation And Retention Of Students On First-Time Scholastic Drop (R&R)., Dee Anna Slavant

LSU Historical Dissertations and Theses

The Remediation and Retention Program (R&R) was initiated at Louisiana State University at Alexandria to develop interventions that target first time scholastic drop students and facilitate the improvement of their overall academic performance and retention. The study was designed to provide support counseling and study skills remediation for students who self selected to readmit under the R&R Program. The study was formulated to evaluated the progress and retention rate of the R&R. Program. Objectives and results of the study included: (1) Describe the students who were placed on first time scholastic drop at LSUA. The average age was 21.97; 62.2% …

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Functions Of Liminality In Literature: A Study Of Georges Bataille's "Le Bleu Du Ciel", Julien Green's "L'Autre", And Assia Djebar's "L'Amour, La Fantasia"., Malynda Strother Taylor Jan 1998

Functions Of Liminality In Literature: A Study Of Georges Bataille's "Le Bleu Du Ciel", Julien Green's "L'Autre", And Assia Djebar's "L'Amour, La Fantasia"., Malynda Strother Taylor

LSU Historical Dissertations and Theses

The term "liminality" originated in the work of two socioanthropologists, Arnold van Gennep and Victor Turner; it is descriptive of the middle phase in a rite of passage. Whereas the "betwixt and between" transitional pattern is temporary in tribal societies, it often becomes a way of life in the twentieth century. Although their projects differ greatly, Victor Turner's and Jacques Derrida's mutual interest in border spaces brings them both into this discussion. Some of the same phenomena described by the sociological term, liminality, is discussed philosophically as "undecidability" and "aporia." Liminality functions to link and to investigate three disparate twentieth-century …

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Bioremediation Of Petroleum Hydrocarbons In Louisiana's Saltwater Marshes: Sediment Oxygen Demand Model., Won Sik Shin Jan 1998

Bioremediation Of Petroleum Hydrocarbons In Louisiana's Saltwater Marshes: Sediment Oxygen Demand Model., Won Sik Shin

LSU Historical Dissertations and Theses

Laboratory core studies were conducted to determine sediment oxygen demand (SOD) in petroleum hydrocarbon contaminated salt marshes. Natural degradation processes in salt marshes such as aerobic respiration, nitrification and sulfate reduction were investigated to quantify SOD. Oxygen demand in oiled/fertilized cores was greater than control and fertilized cores due to increased oxygen consumption by oil degradation and oxidation of reduced chemicals; sulfide and ammonium. SOD under non-flooded condition was greater than flooded condition due to an increased area of oxic-anoxic interface during air exposure. This may indicate that significant biodegradation of crude oil only occurs when the surface of the …

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Maximal Circuits In Matroids., Pou-Lin Wu Jan 1998

Maximal Circuits In Matroids., Pou-Lin Wu

LSU Historical Dissertations and Theses

Lovasz, Schrijver, and Seymour have shown that if a connected matroid M has a largest circuit of size c and a largest cocircuit of size c*, then M has at most 2c+c*-1 elements. A question of Oxley that has attracted considerable recent attention is whether there is an upper bound on the size of M that is polynomial in terms of c and c*. In particular, Bonin, McNulty, and Reid conjectured that 12cc* is such a bound. In Chapter 1, we prove this conjecture for an connected graphic and cographic matroids. In Chapter 2, we give a constructive description of …

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Teacher Selection Practices In Effective Elementary Schools Which Differ By Community Type And Socioeconomic Status Context., Amy Barham Westbrook Jan 1998

Teacher Selection Practices In Effective Elementary Schools Which Differ By Community Type And Socioeconomic Status Context., Amy Barham Westbrook

LSU Historical Dissertations and Theses

The current study investigated teacher selection in elementary schools which differ by school type, community type, and socioeconomic status (SES). The qualities sought, procedures utilized, and problems encountered by principals during teacher selection were examined. Statistical analyses were used to determine whether school types differ significantly on variables regarding teacher selection. The present study involved collecting both qualitative and quantitative data, and was conducted in four phases. In Phase I, all elementary schools in the state were classified by community type, student body SES, and "effective" and "typical" status. Phase II consisted of 12 site visits to "effective" schools which …

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The Effect Of Participation In The Occupational Safety And Health Administration's Voluntary Protection Programs On Injury/Illness Rates., Linda Diane Weems Jan 1998

The Effect Of Participation In The Occupational Safety And Health Administration's Voluntary Protection Programs On Injury/Illness Rates., Linda Diane Weems

LSU Historical Dissertations and Theses

The purpose of this study was to determine the effect participation in the Occupational Safety and Health Administration's (OSHA) Voluntary Protection Programs (VPP) has on injury/illness rates (IIR). Data was obtained from OSHA's Office of Cooperative Programs for the companies participating in the VPP for the years 1983 through 1997. This data was summarized and analyzed to satisfy this study's objectives. Objective 1 was to describe and compare the companies participating in OSHA's VPP and their IIR with the average IIR reported by the Bureau of Labor Statistics (BLS) for the industries for each year of the program's existence from …

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Association Of Environmental And Climatic Factors In The Epidemiology Of American Visceral Leishmaniasis In Northeast Brazil Using Remote Sensing And Geographical Information System Methods., Roland Alexander Thompson Jan 1998

Association Of Environmental And Climatic Factors In The Epidemiology Of American Visceral Leishmaniasis In Northeast Brazil Using Remote Sensing And Geographical Information System Methods., Roland Alexander Thompson

LSU Historical Dissertations and Theses

This study associated climatic and environmental factors with the incidence of visceral leishmaniasis (calazar) in Northeast Brazil. Remote sensing (RS) techniques permitted evaluation of spatial and temporal landscape features to stratify the region and define the target population for this vector-borne disease. The Municipality of Caninde, Ceara, Brazil was divided into 873-- 2 x 2 km2 squares centered on coordinates from a Universal Transverse Mercator projection (scale 1:100,000, 1994) and geo-referenced with 2 Landsat T.M. (TM) scenes (September 26, 1976 and July 2, 1996). The assignment of squares into foothills, plains or city strata was based on vegetative categories determined …

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Processing Of Value-Added Textile And Geotextile Products From Sugarcane And Kenaf., Ovidiu Romanoschi Jan 1998

Processing Of Value-Added Textile And Geotextile Products From Sugarcane And Kenaf., Ovidiu Romanoschi

LSU Historical Dissertations and Theses

Utilization of agricultural crops as alternate raw materials for many industries was investigated for both sugar cane and kenaf. Value-added products with textile and geotextile applicabilities were developed and their properties assessed in direct correlation with their final use. Bundles of fibers were extracted from the rind of sugar cane in three distinct steps: mechanical separation (using a Tilby separator), chemical extraction, and steam explosion. The process of fiber extraction was optimized for an atmospheric pressure alkali delignification, taking into account different factors such as: alkali concentration, reaction time, mixing, and steam explosion. Statistical techniques were used to study the …

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Characterization Of Seven Transmembrane Domain Receptor Gene Expression In Olfactory Receptor Neurons., Kathryn Medler Jan 1998

Characterization Of Seven Transmembrane Domain Receptor Gene Expression In Olfactory Receptor Neurons., Kathryn Medler

LSU Historical Dissertations and Theses

The expression of 7 transmembrane domain receptors in olfactory receptor neurons of the channel catfish, Ictalurus punctatus was characterized. Due to disagreements in the literature as to how many odorant receptor genes are expressed in olfactory neurons, this study directly measured the number of odorant receptor gene transcripts expressed in single olfactory neurons. Individual olfactory receptor neurons can express more than one receptor, with some neurons expressing at least 3 to 4 receptors. These findings correlate with electrophysiological evidence but disagree with conclusions based on in situ hybridization. Receptors similar to odorant receptors are also expressed in taste buds, indicating …

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Ultrafast Studies Of Reaction Dynamics., Zhenguo Feng Jan 1998

Ultrafast Studies Of Reaction Dynamics., Zhenguo Feng

LSU Historical Dissertations and Theses

The long range goal of this research is to understand the role of the solvent in condensed phase reactions. In the gas phase, great strides have been made towards understanding chemical reactivity at the level of individual quantum states. Liquid state reactions are not as well understood due to complicated many-body interactions with the solvent. Our approach has been to study simple reactions in solvents near their critical state. Here a small change in pressure, at constant temperature, allows a continuous change in solvent bulk density and viscosity, from near-liquid to gas-like properties. In this way reactions can be studied …

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The Physiological And Psychological Responses To Submaximal Exercise At Different Times In Renal Disease Patients., Marta Amaral-Melendez Jan 1998

The Physiological And Psychological Responses To Submaximal Exercise At Different Times In Renal Disease Patients., Marta Amaral-Melendez

LSU Historical Dissertations and Theses

This study investigated cardiorespiratory, hematological, and psychological responses to acute submaximal exercise, and recovery in end stage renal disease patients. Five African-American males on hemodialysis, were randomly assigned to three exercise treatments (30 minutes on the treadmill at 60% VO$\sb2$ peak): pre dialysis (2 hours before), post dialysis (1 hour after), and off dialysis (24 hours after last dialysis). The cardiorespiratory (CR) variables were: ventilation (V$\sb{\rm E}$), oxygen consumption (VO$\sb2$), carbon dioxide production (VCO$\sb2$), respiratory exchange ratio (R), and kilocalories (KCAL/min). The hematological variables were: blood urea nitrogen (BUN), creatinine (Cr), albumin (Al), total protein (Tp), glucose (Gl), sodium (Na$\sp{++}$), …

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Form: The Fortran Object Recovery Model. A Methodology To Extract Object-Oriented Designs From Imperative Code., Bonnie Lynn Achee Jan 1998

Form: The Fortran Object Recovery Model. A Methodology To Extract Object-Oriented Designs From Imperative Code., Bonnie Lynn Achee

LSU Historical Dissertations and Theses

A majority of legacy systems in use in the scientific and engineering application domains are coded in imperative languages, specifically, COBOL or FORTRAN-77. These systems have an average age of 15 years or more and have undergone years of extensive maintenance. They suffer from either poor documentation or no documentation, and antiquated coding practices and paradigms (Chik94) (Osbo90). The purpose of this research is to develop a reverse-engineering methodology to extract an object-oriented design from legacy systems written in imperative languages. This research defines a three-phase methodology that inputs source code and outputs an object-oriented design. The three phases of …

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The Interactions Among The Subunits Of The Mcrbc Restriction System In E. Coli., Loganayaki Ganesh Jan 1998

The Interactions Among The Subunits Of The Mcrbc Restriction System In E. Coli., Loganayaki Ganesh

LSU Historical Dissertations and Theses

The McrBC system of Escherichia coli K12 restricts DNA containing modified cytosines within specific sites. The modified cytosines recognized may be 5-hydroxymethylcytosine, N$\sp4$-methylcytosine or 5-methylcytosine. In the mcrBC operon, the mcrB gene is expressed to produce the McrB$\sb{\rm L}$ protein (51 kDa) and the McrB$\sb{\rm S}$ protein (33kDa), which is translated from an inframe internal translation start site and lacks the N-terminal 161 amino acids of the long product. The McrC protein is a 39kDa protein and is required for the cleavage of most methylated substrates. Using a MalE-McrB$\sb{\rm L}$ fusion protein, the endonucleolytic McrB$\sb{\rm L}$ subunit was shown to …

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Detection Of Mechanisms Of Profenofos Resistance In The Tobacco Budworm, Heliothis Virescens (F.)., John Ambrose Harold Jan 1998

Detection Of Mechanisms Of Profenofos Resistance In The Tobacco Budworm, Heliothis Virescens (F.)., John Ambrose Harold

LSU Historical Dissertations and Theses

Biochemical and physiological mechanisms of profenofos resistance in laboratory and field populations of the tobacco budworm, Heliothis virescens (F.) were studied. High frequencies of profenofos resistance were recorded in all field-collected strains and were strongly correlated with esterase (EST) activity and moderately correlated with glutathione S-transferase activity. Mean levels of acetylcholinesterase (AChE) sensitivity to inhibition by chlorpyrifos oxon were lower in some field strains than levels in an insecticide-susceptible strain; however, AChE sensitivity and resistance were poorly correlated in all field strains. There was no correlation between resistance and the activities of P450-monooxygenase or glutathione S-transferase measured. Studies with laboratory-selected …

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A Conceptual And Empirical Approach For Valuing Biodiversity: An Estimate Of The Benefits Of Plant And Wildlife Habitat Preservation In The Tensas River Basin., Jack Coburn Isaacs Jan 1998

A Conceptual And Empirical Approach For Valuing Biodiversity: An Estimate Of The Benefits Of Plant And Wildlife Habitat Preservation In The Tensas River Basin., Jack Coburn Isaacs

LSU Historical Dissertations and Theses

This research estimated the passive use value of local species biodiversity in the Tensas River basin, a section of the Lower Mississippi River Valley. This research employed the contingent valuation method in eliciting willingness to pay for biodiversity conservation using the habitat needs of an umbrella species as a basis for valuation. This study designed and implemented the Lower Mississippi Valley Plant and Wildlife Survey for primary data collection. The sample included 1,351 households drawn from a hunting permit lottery conducted by the Tensas River National Wildlife Refuge and 3,044 households drawn at random from Louisiana, Arkansas, and Mississippi. The …

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Daniel Pratt Of Prattville: A Northern Industrialist And A Southern Town., Curt John Evans Jan 1998

Daniel Pratt Of Prattville: A Northern Industrialist And A Southern Town., Curt John Evans

LSU Historical Dissertations and Theses

This dissertation explores the life of Daniel Pratt, one of the South's most important industrialists. Daniel Pratt was born in Temple, New Hampshire on July 20, 1799. In 1821, he migrated to Jones County, Georgia, where he worked as a carpenter-architect for ten years. He married Esther Ticknor of Connecticut in 1827 Samuel Griswold hired Pratt in 1831 to superintend his cotton gin factory in Jones County. Two years later, Pratt migrated to Autauga County in central Alabama, where he started his own gin shop. In 1839, Pratt founded Prattville, located fourteen miles from Alabama's capital, Montgomery. The next year, …

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Evolutionary Effects Of Irradiation In Cataclysmic Variables., Patrick Joseph Mccormick Jan 1998

Evolutionary Effects Of Irradiation In Cataclysmic Variables., Patrick Joseph Mccormick

LSU Historical Dissertations and Theses

We developed a simple stellar computational model consisting of two concentric polytropic shells in order to investigate compact binary evolution. In this thesis we focus the investigation on the effects of irradiation on the orbital evolution of cataclysmic variables (CVs). In these systems, when the companion is illuminated by a fraction of the accretion luminosity, the orbital evolution consists of irradiation-driven limit cycles on thermal timescales. These cycles are superimposed on the secular evolution toward shorter periods due to systemic angular momentum losses. When the irradiation instability is enhanced by consequential angular momentum losses $j\sb{\rm CAML}$ the net effect is …

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An Exploratory Study Of The Consumer Behavior Of Working Adolescent Females., Diane Denais Sasser Jan 1998

An Exploratory Study Of The Consumer Behavior Of Working Adolescent Females., Diane Denais Sasser

LSU Historical Dissertations and Theses

Employment of high school students has been growing steadily since the mid-1960s (Cole, 1991). Today, more than 40% of all high school students who work are employed at least part-time (U.S. Bureau of Labor Statistics, 1995). Working adolescents may view their earnings as a sudden windfall of income to be used as discretionary income. This "premature affluence" may reinforce inappropriate consumer behaviors such as spending beyond means which may become established habits into their adult lives (Bachman, 1983). The cognitive development of these adolescents may be at the concrete operational thinking stage which inhibits them from handling adult behaviors in …

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Purification And Antioxidant Properties Of Rice Bran (Gamma)-Oryzanol Components., Zhimin Xu Jan 1998

Purification And Antioxidant Properties Of Rice Bran (Gamma)-Oryzanol Components., Zhimin Xu

LSU Historical Dissertations and Theses

A high purity $\gamma$-oryzanol was obtained from crude rice bran oil using a normal phase preparative scale HPLC. It was used in implementing a reverse phase HPLC method for separating each individual component of $\gamma$-oryzanol present in rice bran oil. Ten fractions were isolated in the reverse phase HPLC method. The ten components of $\gamma$-oryzanol were identified. Three of these, cycloartenyl ferulate, 24-methylene cycloartanyl ferulate, and campesteryl ferulate, were major components of $\gamma$-oryzanol. The yield of $\gamma$-oryzanol without saponification was significantly higher than that with saponification in solvent extraction. The solvent mixture with 50% hexane and 50% isopropanol (v/v.) at …

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