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Barium In Water And Foraminiferal Shells: Indicator Of Oceanographic Conditions In The Gulf Of Mexico Since The Late Pleistocene., Thomas Peter Buerkert Jan 1999

Barium In Water And Foraminiferal Shells: Indicator Of Oceanographic Conditions In The Gulf Of Mexico Since The Late Pleistocene., Thomas Peter Buerkert

LSU Historical Dissertations and Theses

The Gulf of Mexico offers an appropriate setting for studying the chemical dynamics at the continent-ocean interface. In addition, its sediments preserve the climatic records of the past. This study employs Ba as a tracer to examine several aspects of modern Gulf oceanographic processes and seeks to unravel Gulf paleoceanography using Ba/Ca ratios from fossil foraminiferal shells. Comparison of dissolved Ba in the Mississippi and Atchafalaya River mixing zones suggests different Ba distributions can occur as a result of hydrodynamic and morphologic variability. Rapid Ba desorption from suspended material occurs near the Mississippi River, while Ba input from the shallow …

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An Introduction To Joaquin Nin (1879-1949) And His "Veinte Cantos Populares Espanoles"., Gina Lottinger Anthon Jan 1999

An Introduction To Joaquin Nin (1879-1949) And His "Veinte Cantos Populares Espanoles"., Gina Lottinger Anthon

LSU Historical Dissertations and Theses

Joaquin Nin was a leading figure in the renaissance of Spanish music in the early part of the twentieth century. A virtuoso concert pianist, he championed the music of little-known 17th and 18 th century Spanish composers, performing their works alongside Bach, Couperin, and Liszt. Nin's editions of "ancient" Spanish music and his arrangements of popular songs and dances brought a body of virtually unknown repertoire---the exotic music of the Iberian Peninsula---to a broader public. The purpose of this paper is to better acquaint the reader with Joaquin Nin and his first compositions, Veinte Cantos Populares Espanoles . Although Nin …

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Reflections Of Science And Technology In American Drama From 1913 To 1941., Charles Keith Cockrell Jan 1999

Reflections Of Science And Technology In American Drama From 1913 To 1941., Charles Keith Cockrell

LSU Historical Dissertations and Theses

The growth of science and technology exploded in the first half of the twentieth century. At the same time America was developing for the first time a dramatic literature that was worthy of international respect. Beginning in 1913, when the young Eugene O'Neill wrote his first plays, this study traces the appearances of science and technology in the drama from that year until the start of World War II. Special attention has been given to the clock, the car, electronic communications, scientists, dehumanization in the machine age, technology as religion, and film. The drama of the era reveals a previously …

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A Troublesome Commerce: The Interstate Slave Trade, 1808-1840., Robert Harold Gudmestad Jan 1999

A Troublesome Commerce: The Interstate Slave Trade, 1808-1840., Robert Harold Gudmestad

LSU Historical Dissertations and Theses

The interstate slave trade grew from a haphazard and intermittent enterprise in the early years of the nineteenth century to a central aspect of southern society. With the decline of the international trade and the decline of white migration to the frontier, southerners turned to the trade to supply their labor needs. Farmers in the Chesapeake region increasingly sold their "excess" bondservants to slave traders. These speculators brought a measure of systemization and regularity to the trade. As they did so, however, a significant number of Upper South citizens questioned the trade's efficacy. The wanton exploitation and naked cruelty of …

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The Names Project Aids Memorial Quilt: A Novelistic Approach To Decoding The Layers Of Meaning In The "Pieced" Social Drama., Louis Edward Myers Jan 1999

The Names Project Aids Memorial Quilt: A Novelistic Approach To Decoding The Layers Of Meaning In The "Pieced" Social Drama., Louis Edward Myers

LSU Historical Dissertations and Theses

In this study, I focus on the AIDS crisis as a social drama, and evaluate the various functions the AIDS Memorial Quilt plays within that drama. Using Victor Turner's concept of social drama I first discuss the breach, crisis, redression, and reintegration stages. I identify two fundamental breaches in the AIDS drama---the health breach and the moral/religious breach. As regards the crisis phase of the drama, I identify specific crisis performers and performances. Although many attempts were made at redression, I conclude that most attempts were not successful as redressive acts. Rather than "solve" or "set straight" particular issues within …

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Epidemiology Of Anthrax In The Kruger National Park, South Africa: Genetic Diversity And Environment., Kimothy Lyn Smith Jan 1999

Epidemiology Of Anthrax In The Kruger National Park, South Africa: Genetic Diversity And Environment., Kimothy Lyn Smith

LSU Historical Dissertations and Theses

The Kruger National Park, (KNP), in the Republic of South Africa, provides a unique opportunity to investigate interesting and unresolved aspects of the epidemiology of the disease anthrax. Anthrax is a disease of primarily mammals caused by the Gram-positive, rod-shaped, spore-forming bacteria Bacillus anthracis. Beyond it's great historical significance anthrax is clearly important in the world today. From a rich legacy of empirical investigations and observations in the form of ecological and epidemiological studies conducted around the world this work endeavors to distill and extract the essence of what biotic and abiotic factors of environment might be causally associated with …

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Analysis Of *Policy Alternatives In The Implementation Of A Coastal Nonpoint Pollution Control Program For Agriculture., Hugo Cardona Castillo Jan 1999

Analysis Of *Policy Alternatives In The Implementation Of A Coastal Nonpoint Pollution Control Program For Agriculture., Hugo Cardona Castillo

LSU Historical Dissertations and Theses

Agriculture has been singled out as one of the major nonpoint sources of water pollution. To identify alternative policy tools for the implementation of a non-regulatory approach to comply with the Coastal Nonpoint Pollution Control Program (CNPCP) required by The Coastal Zone Act Reauthorization Amendments of 1990, policy makers need to determine factors that may influence producers' willingness to adopt proposed Best Management Practices (BMPs). Neoclassical economic concepts of utility maximization on the part of agricultural producers constitutes the theoretical background in this study, but it is enhanced with the incorporation of a well proved set of theoretical tools based …

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Musing The Garden: A Poetics Of Place And Emplacement., Scott Parker Smiley Jan 1999

Musing The Garden: A Poetics Of Place And Emplacement., Scott Parker Smiley

LSU Historical Dissertations and Theses

A walk through a garden is an immersion into a wealth of sensory and relational experiences of place. Plant varieties, color, texture, flowers, forms, pathways, light, benches, ornaments, and other experiential qualities of place work upon one's consciousness to draw one into intimate contact with the place "Emplacement" is this intimate, immersed engagement with a place, a process and state of being that erodes the boundaries we so often erect between self and environment. Traditional systematic forms of inquiry, based upon the Cartesian idea of an essential separation between object and subject, are not applicable to the study of emplacement …

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Religious Art: Reflectors Of Change In The Catholic Church In New Mexico, 1830--1910., Shirley Jean Sands Jan 1999

Religious Art: Reflectors Of Change In The Catholic Church In New Mexico, 1830--1910., Shirley Jean Sands

LSU Historical Dissertations and Theses

In 1846, the United States of America began a war with the Republic of Mexico. When it was over, one of the results was the acquisition of much of current California, Arizona, Nevada, Utah, southern Colorado and New Mexico. The region was occupied by Catholic Mexicans, a fact not lost on the American Catholic hierarchy. The result is the sending of a new religious administration and the founding of what would become the Archdiocese of Santa Fe. The clergy sent were French with French notions of civilization, culture, and proper Catholic theology. These views and notions were contrary to those …

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Petroleum Reservoir Simulation Using 3-D Finite Element Method With Parallel Implementation., Husam M. Yaghi Jan 1999

Petroleum Reservoir Simulation Using 3-D Finite Element Method With Parallel Implementation., Husam M. Yaghi

LSU Historical Dissertations and Theses

Modeling fluid flow around wellbores with conventional reservoir simulators is inaccurate because radial flow occurs in the vicinity of the wellbore and these simulators use cartesian coordinates. In this research, we present a more accurate wellbore simulation by incorporating the finite element method (FEM) to simulate the radial flow in the vicinity of the wellbore and interfacing this finite element wellbore model with an existing finite difference method (FDM) reservoir simulator. Although this technique was developed for a vertical well, it could also be used to accurately model a horizontal wellbore. This "hybrid" solution is for three dimensional---triphasic fluid flow …

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Risk Management Of Aflatoxin Through Mutagenic Potential Modification And Toxin Formation By Intrinsic Components In Food., Syed Shahid Ali Jan 1999

Risk Management Of Aflatoxin Through Mutagenic Potential Modification And Toxin Formation By Intrinsic Components In Food., Syed Shahid Ali

LSU Historical Dissertations and Theses

Aflatoxins are the secondary metabolites of Aspergillus flavus and their presence in food and feed crops is unavoidable. This study evaluates the antimutagenic properties of phytic and linoleic acids in aflatoxin-affected food. A reduction in the number of revertants was a function of an increased concentration of phytic/linoleic acids and phosphotidylinositol in the Salmonella/microsomal mutagenicity assay (tester strains TA-100 and TA-98) with and without metabolic activation (S-9). Linoleic acid (10 and 100 mug/plate) and phosphotidylinositol (25mug/plate) were antimutagenic against most of the mutagens tested. Although a reduction in the number of revertants was observed in the phytic acid treatments, the …

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Increased Nutritional Value And Oxidative Stability Of Restructured Beef Roasts With Purified Extracts From Rice Bran., Joo-Shin Kim Jan 1999

Increased Nutritional Value And Oxidative Stability Of Restructured Beef Roasts With Purified Extracts From Rice Bran., Joo-Shin Kim

LSU Historical Dissertations and Theses

The effects of semi-purified extracts of rice bran were studied in restructured beef roasts to increase nutritional value and oxidative stability. Crude rice bran oil at 0, 1, and 2% (w/w) was added to restructured beef roasts that were stored at 4°C and analyzed at 0, 7, and 14 d. Saturated fatty acid to unsaturated fatty acid (SFA/UFA) ratio decreased, vitamin E vitamers increased (p < 0.05), and cholesterol decreased in the beef roasts with rice bran oil. Thiobarbituric acid reactive substances (TBARs) numbers were lower (p < 0.05) in the beef roasts with rice bran oil after 7 days of storage and the cholesterol oxidation product, 7-ketocholesterol, decreased in a similar manner. The addition of 2% rice bran oil (RBO) was effective in increasing nutritional value and reducing the level of oxidative degradation. Beef roasts containing either rice fiber (RF) or RF/RBO had higher oxidative stability (p < 0.05) during storage (0, 4, and 8 d) compared to control roasts, with no additive. TBARs value and 7-ketocholesterol of beef roasts with RF and RF/RBO were lower (p < 0.05) than those of the control during storage. SFA/UFA ratio was significantly reduced in beef roasts with additives, whereas vitamin E vitamers and UFA were higher (p < 0.05) in the roasts with RF/RBO. Beef roasts containing RF and RBO were acceptable to consumers in sensory attributes. Cholesterol autoxidation was examined in an aqueous meat model system with different levels of nonsaponifiable fraction from rice bran (0, 700, 1400, and 2100 ppm). The effect of nonsaponifiable fraction was determined at 4 h intervals for 16 h at pH 5.5 and 80°C. Increased oxidation time reduced (p < 0.05) total vitamin E vitamers and cholesterol concentration. Oryzanol was not significantly reduced with the 2100 ppm treatment after 4 h cholesterol oxidation. An increase in the nonsaponifiable fraction resulted in a decrease (p < 0.05) in the formation of 7-ketocholesterol. The highest level of additive (2100 ppm) was the most effective in inhibiting cholesterol autoxidation; the order of inhibition was 91.7% (2100 ppm) > 81.8% (1400 ppm) > 63.1% (700 ppm).

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The Effects Of Type Of Web Support And Instructional Mode On The Knowledge And Discrimination Of Musical Texture Among Undergraduate Elementary Education Majors., Kenneth Lee Liske Jan 1999

The Effects Of Type Of Web Support And Instructional Mode On The Knowledge And Discrimination Of Musical Texture Among Undergraduate Elementary Education Majors., Kenneth Lee Liske

LSU Historical Dissertations and Theses

The purpose of this study was to investigate the effects of varying types of out-of-class web support media and active (performance) versus passive (listening) modes of in-class instructional activities on the ability of university level non-musicians (N = 58) to define and identify specific characteristics of music texture from printed and recorded musical excerpts. Near and far transfer of learning was also examined. Three web support treatments consisted of investigator-designed supplementary web sites, available for out-of-class access, containing visual content only, audio and visual content, or progressively disclosed text, graphics, and sound. Two instructional mode treatments consisted of participation in …

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Characterization Of Solidification/Stabilization Of Chromium Wastes In Cement Matrix., Aijun Zhang Jan 1999

Characterization Of Solidification/Stabilization Of Chromium Wastes In Cement Matrix., Aijun Zhang

LSU Historical Dissertations and Theses

A cement-based solidification/stabilization (S/S) system of Cr wastes treatment has been studied in this program. A combination of the two techniques; namely reduction of Cr(VI) to Cr(III) and simultaneous immobilization within a cement matrix, has been found to be effective and practical to treat Cr wastes. Cr(VI) can not be easily and effectively-immobilized in the S/S system unless being reduced to Cr(III). Ferrous compounds are used as reducing reagents. The reduction not only removes the toxic Cr(VI) species but also results in the low-solubility precipitation of (CrxFe 1-x) (OH)3(s) in the S/S system. Long-term and short-term samples were tested through …

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Development Of Monoclonal Antibody And Enzyme Linked Immunosorbent For Detection Of Off -Flavor Compound 2-Methylisoborneol., Eun Sung Park Jan 1999

Development Of Monoclonal Antibody And Enzyme Linked Immunosorbent For Detection Of Off -Flavor Compound 2-Methylisoborneol., Eun Sung Park

LSU Historical Dissertations and Theses

2-Methylisoborneol (MIB), a secondary metabolite of cyanobacteria and fungi, causes earthy-musty taste and odor. This is a significant problem in the aquaculture industry and large scale water supplies. Especially it is a major problem for the channel catfish industry. To monitor the levels of this compound for quality control and abatement, rapid, sensitive and inexpensive methods are needed. This research reports the development of an indirect enzyme linked immunosorbent assay (ELISA) for MIB using monoclonal antibodies. For the preparation of monoclonal antibodies against MIB, MIB-Limulus polyphemus hemocyanin (LPH) and borneol-LPH were synthesized as an immunogen. Borneol-bovine serum albumin (BSA), isoborneol-BSA, …

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Production Of Transgenic Eastern Oysters., John Terrell Buchanan Jan 1999

Production Of Transgenic Eastern Oysters., John Terrell Buchanan

LSU Historical Dissertations and Theses

The eastern oyster, Crassostrea virginica, supports a valuable industry in the United States and Louisiana. In recent years this industry has been plagued by diseases, creating interest in the use of gene transfer to produce oysters capable of eliminating pathogens. The goal of this work was to develop techniques for laboratory research of eastern oysters, and for transfer of genes to oyster gametes, larvae, and adults. Cell culture provides an effective alternative to work in whole animals. Cell attachment and spreading on various culture substrates was improved, and poly-D-lysine was identified as a superior substrate. Toxicity of the antibiotic G418 …

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Toxicity Of Neem-Based Insecticides On Aquatic Animals And Cell Lines., Ipek Goktepe Jan 1999

Toxicity Of Neem-Based Insecticides On Aquatic Animals And Cell Lines., Ipek Goktepe

LSU Historical Dissertations and Theses

The impact of pure azadirachtin (AZA) and neem-based insecticides (Neemix(TM) and Bioneem(TM)) on eight aquatic animals (crayfish, white shrimp, grass shrimp, blue crab, water fleas, oyster, freshwater snails, and mosquito) and two cells (hybridoma and oyster) were assessed by short term acute toxicity tests of 48 and 96 h. The LC50 (in vivo bioassays) and IC50 (in vitro bioassays) were determined for each species. Stability of (Neemix(TM) and Bioneem(TM)) was tested under light, air, and heat (24 and 37°C) for 1, 3, 6, and 9 days. Neemix(TM) and Bioneem(TM)) were fractionated into two fractions (volatiles and nonvolatiles) and toxicities of …

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Molecular Genetics And Functions Of Herpes Simplex Virus Type 1 (Hsv-1) Glycoprotein K (Gk) In The Morphogenesis Of Infectious Virion Particles., Timothy Paul Foster Jan 1999

Molecular Genetics And Functions Of Herpes Simplex Virus Type 1 (Hsv-1) Glycoprotein K (Gk) In The Morphogenesis Of Infectious Virion Particles., Timothy Paul Foster

LSU Historical Dissertations and Theses

Herpes simplex virus type 1 (HSV-1) specifies at least 11 glycoproteins that are expressed in infected cells and in virions. HSV-1 enters into cells via fusion of the viral envelope with cellular membranes and can spread to adjacent cells via fusion of cellular membranes. Glycoproteins gB, gD, gH, and gL are known to be essential for virus entry, virus spread, and virus induced cell-to-cell fusion. The majority of spontaneous single amino acid changes that cause extensive cell fusion map within the UL53 gene encoding glycoprotein K (gK); however, the role of gK in virus entry and virus egress had not …

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Family Portraits: Contemporary Women Novelists And The Nuclear Family., Tamra Lynn Horton Jan 1999

Family Portraits: Contemporary Women Novelists And The Nuclear Family., Tamra Lynn Horton

LSU Historical Dissertations and Theses

A society whose economy becomes increasingly dependent on commodity fetishism cultivates obsessive materialistic desire in its subjects. The demand for mass consumerism buoys reification, a mania wherein human beings are analogous to goods and vice versa. Successful reification depends upon hegemonic apparatuses: social, legal, and political agencies of dominant ideology. Reification is perhaps most fully realized in the form of fetishized human relationships. In the United States today, the most coercive and unassailable hegemonic apparatus is the institutionalized nuclear family, a social and legal affiliation between individuals so dogmatically fetishized as to have become compulsory. Contemporary American women writers are …

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Development Of Efficient Rice Dna Transformation Methods And Rapid Evaluation Of Transgenic Lines., Junda Jiang Jan 1999

Development Of Efficient Rice Dna Transformation Methods And Rapid Evaluation Of Transgenic Lines., Junda Jiang

LSU Historical Dissertations and Theses

A rapid and efficient method was developed for production and field evaluation of transgenic herbicide resistant elite U.S. rice (Oryza sativa L.) lines and cultivars. Six elite U.S. rice lines, including the cultivar Cocodrie, were transformed for glufosinate (phosphinothricin) herbicide resistance by particle bombardment of mature seed-derived embryogenic calli with a synthetic pat gene or the bar gene from Streptomyces hygroscopicus. By utilizing optimized media for embryogenic callus induction and bialaphos or hygromycin B as a selection agent, 258 independent transformed calli, producing 1268 transgenic plants, were recovered from 5201 bombarded calli. Transformation efficiency ranged from 5% for breeding line …

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Factors Influencing Effectiveness Of Exhibit Displays On Family Learning In A Public Aquarium., Kodi Rae Jeffery Jan 1999

Factors Influencing Effectiveness Of Exhibit Displays On Family Learning In A Public Aquarium., Kodi Rae Jeffery

LSU Historical Dissertations and Theses

An important goal in science education reform is to create a scientifically literate society. The American Association for the Advancement of Science (1989b) has stated that for people to understand biology, they must first have personal experiences with it. There are severe limitations on the types of firsthand biology experiences available in the classroom. Informal learning institutions, however, are not limited by these constraints. Visitors enjoy a free-choice environment, where they can thoroughly explore things unavailable in most classrooms. Thus, museums are key resources that may help society achieve scientific literacy. This study asked what aspects of the Aquarium of …

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Classification Of Text Documents Using A Logical Analysis Approach., Salvador Nieto Sanchez Jan 1999

Classification Of Text Documents Using A Logical Analysis Approach., Salvador Nieto Sanchez

LSU Historical Dissertations and Theses

The main problem investigated in this dissertation is as follows: Given are two samples of documents each from one of two disjoint collections of documents. The question is how to obtain a set of patterns of text features that make a document in the two samples (and other unclassified documents) to be classified correctly in one and only one document class. A sample of 2,897 documents from the TIPSTER collection was used to investigate this problem. This problem was divided into the following four subproblems. The first subproblem consists of identifying the set keywords to describe the documents' content. Computational …

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Holocene Environmental Change In Mainland Southeast Asia: Pollen And Charcoal Records From Cambodia., Andrew Lee Maxwell Jan 1999

Holocene Environmental Change In Mainland Southeast Asia: Pollen And Charcoal Records From Cambodia., Andrew Lee Maxwell

LSU Historical Dissertations and Theses

Major Holocene environmental changes in continental Southeast Asia are reconstructed using proxy data derived from analysis of 14C-dated changes in pollen, microscopic charcoal, and organic/inorganic carbon in sediment cores taken from permanent, closed-basin, volcanic lakes in Ratanakiri Province, northeastern Cambodia. Analysis focuses on the history of monsoon climate and land use, inferred from changes in vegetation, fire regime, and lake conditions. These data provide the first well dated palynological record, covering most of the Holocene and continuous up to the present, from an upland site in mainland Southeast Asia. The record from a 15-meter core retrieved from Yeak Kara Lake, …

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Cryopreservation Of Gametes And Larvae Of The Eastern Oyster Crassostrea Virginica., Carmen G. Paniagua-Chavez Jan 1999

Cryopreservation Of Gametes And Larvae Of The Eastern Oyster Crassostrea Virginica., Carmen G. Paniagua-Chavez

LSU Historical Dissertations and Theses

Storage of gametes and larvae offers benefits for research and commercial oyster production and should be applicable in the hatchery at a commercial scale. We optimized refrigerated storage of eastern oyster sperm. Significant differences were found in the motility of sperm suspended in artificial sea water (ASW) of different osmotic pressures (P < 0.001). The highest motility was found in undiluted sperm and the lowest in 1:31 dilution. The greatest larval survival at 12 h (48%) was obtained with sperm diluted in calcium-free Hanks' balanced salt solution (C-F HBSS). Thus, for storage of longer than 1 d, it is best to leave samples undiluted. However, when sperm samples are diluted, it is best to maintain high sperm concentrations and to use C-F HBSS as an extender. Samples were frozen at -2.5°C/min, held for 5 min at -30°C, and plunged in liquid nitrogen using 10% propylene glycol (PG) as the cryoprotectant for sperm and 10% or 15% PG for trochophore larvae. Motility and fertilizing ability of thawed sperm were affected by cryoprotectant concentration and thawing temperature (P = 0.0001). Larval survival was affected by the concentration of larvae per straw (P = 0.0011). Frozen samples were transported to an oyster hatchery at Grand Isle, Louisiana. After 4 months, 1,000 oysters from the control group, 230 oysters produced from thawed sperm, and 850 oysters from thawed larvae were found. Oysters produced from thawed larvae developed normally in the hatchery, demonstrating opportunities for use of cryopreservation in research and aquaculture. Flow cytometry with the fluorescent dyes Sybr-14 and propidium iodide (PI) was used to assess membrane damage of thawed sperm, and rhodamine 123 and PI were used to assess mitochondrial function. Preliminary studies of cryopreservation of oyster eggs were performed. Fluorescein diacetate (FDA) was used to identify viable eggs. Dimethyl sulfoxide (0.88 M and 1.75 M) and sucrose (0.12 M and 0.25 M) were the least toxic cryoprotectants evaluated. The cooling rate yielding least damage to eggs was -1.5°C per min. However, only an average of 14 eggs (out of 200) were stained with FDA in thawed samples and none were fertilizable.

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The Performance Of Prekindergarten Children On Representational Tasks Across Levels Of Displacement., Emily Flake Smith Jan 1999

The Performance Of Prekindergarten Children On Representational Tasks Across Levels Of Displacement., Emily Flake Smith

LSU Historical Dissertations and Theses

This investigation was guided by Nelson's (1996) experiential theory and the Situational-Discourse-Semantic (SDS) model of Norris and Hoffman (1993, 1997, in press) which was used to establish predictions regarding the representational difficulty of each of the task conditions. Subjects were 32 four-year-old children enrolled in four prekindergarten programs located within a small city in southern Louisiana and represented both lower and middle SES populations. The tasks required subjects to represent knowledge of the bedtime routine, ranging from personal enactments with props through generation of stories and event scripts for hypothetical situations. Performances were analyzed for content in terms of event …

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The Effects Of Rumen Undegradable Choline In The Nutrition And Metabolism Of Dairy Cows., Fernando Vazquez Jan 1999

The Effects Of Rumen Undegradable Choline In The Nutrition And Metabolism Of Dairy Cows., Fernando Vazquez

LSU Historical Dissertations and Theses

This study was conducted to determine whether supplemental rumen protected choline could improve lactation performance and lipid metabolism in cows in negative energy balance. In experiment 1, 19 primiparous Holstein cows were randomly assigned to dietary treatments consisting of either a control ration or control plus 15 g/d of supplemental rumen-protected choline (60 g/d of Cap-Shure, Balchem Corp., Slate Hill, NY). Close-up and early lactation rations were formulated from a grass hay and corn silage forage base, respectively, with a corn-soy concentrate, whole cottonseed. and alfalfa hay included as appropriate to meet nutrient requirements. Cows were milked twice daily. Cows …

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The Potential Of High Oryzanol Rice Bran Oil As An Antioxidant In Whole Milk Powder., Jackin Njagi Nanua Jan 1999

The Potential Of High Oryzanol Rice Bran Oil As An Antioxidant In Whole Milk Powder., Jackin Njagi Nanua

LSU Historical Dissertations and Theses

Lipid autoxidation of whole milk powder (WMP) during storage lowers its organoleptic quality and causes accumulation of oxidation products. This study evaluated the effectiveness of high-oryzanol (2.5%) rice bran oil (RBO) as an antioxidant in WMP. The powder was fortified with 0.1% and 0.2% RBO and its oxidation studied during accelerated storage at 45°C and 0.31 water activity for 40 days. Free radicals were determined by electron spin resonance spectroscopy. Oxidation was estimated by determining thiobarbituric acid reactive substances (TBARS) and cholesterol oxidation products using gas chromatography. The effect of RBO on flavor and consumer preference of freshly manufactured milk …

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Louisiana Agriculture Winter, 1999, Lsu Agcenter Jan 1999

Louisiana Agriculture Winter, 1999, Lsu Agcenter

Louisiana Agriculture

No abstract provided.

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Zim1, A Maternally Expressed Mouse Kruppel-Type Zinc-Finger Gene Located In Proximal Chromosome 7, Joomyeong Kim, Xiaochen Lu, Lisa Stubbs Jan 1999

Zim1, A Maternally Expressed Mouse Kruppel-Type Zinc-Finger Gene Located In Proximal Chromosome 7, Joomyeong Kim, Xiaochen Lu, Lisa Stubbs

Faculty Publications

In analysis of a conserved region of proximal mouse chromosome 7 and human chromosome 19q, we have isolated a novel mouse gene, Zim1 (imprinted zinc-finger gene 1), encoding a typical Kruppel-type (C2H2) zinc-finger protein, located within 30 kb of a known imprinted gene, Peg3 (paternally expressed gene 3). Our studies demonstrate that Zim1 is also imprinted; the gene is expressed mainly from the maternal allele and at high levels only during embryonic and neonatal stages. In contrast to most tissues, Zim1 is expressed biallelically in neonatal and adult brain with slightly more input from the maternal allele. Zim1 produces multiple …

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Ferric Iron Reduction By Bacteria Associated With The Roots Of Freshwater And Marine Macrophytes, G. M. King, Meredith A. Garey Jan 1999

Ferric Iron Reduction By Bacteria Associated With The Roots Of Freshwater And Marine Macrophytes, G. M. King, Meredith A. Garey

Faculty Publications

In vitro assays of washed, excised roots revealed maximum potential ferric iron reduction rates of >100 μmol g (dry weight)-1 day-1 for three freshwater macrophytes and rates between 15 and 83 μmol (dry weight)-1 day-1 for two marine species. The rates varied with root morphology but not consistently (fine root activity exceeded smooth root activity in some but not all cases). Sodium molybdate added at final concentrations of 0.2 to 20 mM did not inhibit iron reduction by roots of marine macrophytes (Spartina alterniflora and Zostera marina). Roots of a freshwater macrophyte, Sparganium eurycarpum, that were incubated with an analog …

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