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The Morphology, Development, And Function Of Experimentally Induced Macrophage Aggregates In Rivulus Marmoratus., Wolfgang Klaus Vogelbein Jan 1991

The Morphology, Development, And Function Of Experimentally Induced Macrophage Aggregates In Rivulus Marmoratus., Wolfgang Klaus Vogelbein

LSU Historical Dissertations and Theses

Calyptospora funduli is a pathogenic coccidium that infects the liver and pancreas of estuarine killifishes belonging to the genus Fundulus. Experimental infection of the atypical fish host Rivulus marmoratus with this intracellular protozoan parasite caused the development of hepatic macrophage aggregates (MA's) and granulomas. The Rivulus/Calyptospora host-parasite system thus represents a new laboratory model for investigations of MA biology. In the present study, this model was used to: (1) examine the morphology and sequential development of the parasite-elicited hepatic MA's in R. marmoratus, (2) define the role that these structures play in the pathogenesis of an infectious disease process, and …

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Self And Power: Political Reconstruction In The Drama Of Christopher Marlowe., Patricia A. Brown Jan 1991

Self And Power: Political Reconstruction In The Drama Of Christopher Marlowe., Patricia A. Brown

LSU Historical Dissertations and Theses

Christopher Marlowe created Renaissance drama as we think of it today. Marlowe's princely protagonists are studied here not as sovereigns responsible for the general well-being of their subjects, but as ambitious characters who use power to control their personal environment. Seen from this viewpoint, the dramatic function of the central characters is either to develop a new stance toward the idea of public authority or to refashion an old one. Instead of attending to governance, they attempt to encompass all existence within themselves: Tamburlaine the world conqueror; Edward and Dido, public rulers whose private relationships transform their public positions; the …

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Prediction Of Sugarcane Cross Potential At Early Selection Stages., Yih-Shiow Chang Jan 1991

Prediction Of Sugarcane Cross Potential At Early Selection Stages., Yih-Shiow Chang

LSU Historical Dissertations and Theses

The primary goal of this study was to develop a faster sugarcane cross appraisal method. The effect of intrarow plant spacing on trait variability was also investigated. The study evaluated 1800 progeny from 15 crosses among 23 parents at two intrarow plant spacings in 1989 and 1990. Data were collected on plant cane (PC) and first ratoon (FR) single stool seedlings, and first clonal (FC) plots. The family mean, the normal probability of an elite proportion (PROB), the observed elite proportion, and the best linear unbiased predictors (BLUPs) were estimated for each trait. The calculated statistics were strongly correlated within …

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The Introduction Into Tobacco Plants Of Genes Which Encode Some Of The Natural Components Of The Humoral Immune Response Of Hyalophora Cecropia., Luis Julio Cesar Destefano Beltran Jan 1991

The Introduction Into Tobacco Plants Of Genes Which Encode Some Of The Natural Components Of The Humoral Immune Response Of Hyalophora Cecropia., Luis Julio Cesar Destefano Beltran

LSU Historical Dissertations and Theses

A number of plant pathogenic bacteria has been shown to be highly sensitive to SB-37, a derivative of cecropin B (one of the three cecropins from the giant silk moth Hyalophora cecropia). The lytic activity exhibited by SB-37 has been shown to increase up to twenty-fold in the presence of chicken egg white lysozyme. The cDNAs genes encoding SB-37, attacin E (another component of the humoral response of Hyalophora cecropia), and chicken lysozyme have been introduced into tobacco (var Xanthi) and potato (a new cultivar 86007) plants by Agrobacterium-mediated transformation using co-integrate and binary vectors. The genes were placed under …

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Faulkner, Truth, And The Artist's Directive: A Reading Of "A Fable"., Bobby Lynn Matthews Jan 1991

Faulkner, Truth, And The Artist's Directive: A Reading Of "A Fable"., Bobby Lynn Matthews

LSU Historical Dissertations and Theses

The old general in A Fable embodies the resolution of questions about the relation of art and life that Faulkner evoked in his invention of Quentin Compson in The Sound and the Fury and pursued in a series of subsequent characterizations. This artist-figure motif discloses Faulkner's implication of the relation in the modern crisis of faith. Faulkner images in narrative fiction what Nietzsche asserts in discourse, namely, the need for a reversal of the Platonic valuation of eternal "truth" (ideality) over art. The characterization of Quentin shows the potentially terrible consequences of man's propensity for mythopoeic invention, as Quentin's unconscious …

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Writing And Modernity: Colette's Feminist Fiction., Lezlie Hart Stivale Jan 1991

Writing And Modernity: Colette's Feminist Fiction., Lezlie Hart Stivale

LSU Historical Dissertations and Theses

My choice of Colette's fiction as the subject of critical analysis is one occasioned not only by the richness of her literary corpus, but also by the marginalization of Colette's work as "natural" or "feminine" within the French literary canon. While much has been written on Colette, consideration of her personal life has overly influenced the critical evaluation of her works. I break with the prevalent biographical trend in Colette criticism by approaching seven of her novels from feminist perspectives informed by deconstruction, narratology and psychoanalysis. These productive readings reveal multiple destabilizing effects. A close reading of Cheri locates sites …

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Metabolic Pathways Associated With Glycogen Storage In Chronically Active And Normal Skeletal Muscle., Robert James Talmadge Jan 1991

Metabolic Pathways Associated With Glycogen Storage In Chronically Active And Normal Skeletal Muscle., Robert James Talmadge

LSU Historical Dissertations and Theses

To determine the pathways used for glycogen synthesis in chronically active and normal muscle, muscles from C57B1/6J dy$\sp{\rm 2J}/$dy$\sp{\rm 2J}$(dy$\sp{\rm 2J}$) mice were evaluated biochemically and histochemically. The gastrocnemius muscle (GAST) of the dy$\sp{\rm 2J}$ mouse, a chronically active muscle, contained twice as much glycogen and lactate as control GAST. The dy$\sp{\rm 2J}$ triceps muscle (TRI), which is not chronically active, showed no elevation in glycogen content. An intraperitoneal injection of $\sp{14}$C-lactate resulted in increased incorporation of $\sp{14}$C into glycogen by dy$\sp{\rm 2J}$ compared to control GAST. Both normal and dy$\sp{\rm 2J}$ GAST incorporated $\sp{14}$C into glycogen in an in …

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The Immunoepidemiology Of Lung Cancer And Smoking: Lymphocyte Subsets., Joan Peters Blackmon Jan 1991

The Immunoepidemiology Of Lung Cancer And Smoking: Lymphocyte Subsets., Joan Peters Blackmon

LSU Historical Dissertations and Theses

The relative proportions of lymphocyte subsets in the peripheral blood constitute a measure of immune status. Results of research to establish whether or not individuals with lung cancer differ in their lymphocyte composition have conflicted due to failure to control for factors other than cancer that affect lymphocyte balance. This study was designed to quantitatively estimate the effects of variables such as disease (lung cancer), smoking, age, circadian and circannual rhythms, and dietary factors on lymphocyte subsets. Questionnaires were given to 64 white males with primary lung cancer and 219 cancer-free white males and a blood sample was obtained. Lymphocytes …

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The Making Of Meaning: Three Children's Responses To Three Researcher-Composed Narratives., Mary S. Everett Jan 1991

The Making Of Meaning: Three Children's Responses To Three Researcher-Composed Narratives., Mary S. Everett

LSU Historical Dissertations and Theses

Three children's responses to three research-composed narratives were investigated. Participants were eight-year-old girls from the lower S.E.S., African-American culture. Study focuses on the composing processes used to write three children's stories and the responses of children to the stories. The author's intended meaning was compared with the children's construction of meaning. After each story was read aloud, response was elicited by each participant retelling the story and answering open-ended interview questions. One week later the participant was asked to retell the story a second time to determine changes in concept of story. Data were analyzed according to grounded theory methodology. …

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Genotype X Environment Interaction For Growth And Reproductive Traits In Beef Cattle., Louis Munyakazi Jan 1991

Genotype X Environment Interaction For Growth And Reproductive Traits In Beef Cattle., Louis Munyakazi

LSU Historical Dissertations and Theses

Data on eight different two breed combinations of calves produced in two locations (Louisiana and Nebraska) were analyzed to determine the magnitude of genotype x location interactions for gestation length (GESTLEN), birth weight (BWT), pre-weaning average daily gain (ADG) and weaning weight (WWT). Sire breed (SB), sire/SB and cow breed (CB) interactions with location (LOC) were the primary sources of variation of interest in the analysis of variance. The SB x LOC interaction was significant for all traits whereas the CB x LOC interaction was important only for ADG. The sire/SB x LOC interaction accounted for a significant amount of …

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In Vitro Culture Of Bovine Uterine And Oviduct Epithelial Cells., John Kevin Thibodeaux Jan 1991

In Vitro Culture Of Bovine Uterine And Oviduct Epithelial Cells., John Kevin Thibodeaux

LSU Historical Dissertations and Theses

A reliable procedure was developed to harvest purified populations of bovine uterine epithelial cells from the luminal endometrium that allowed cells to be maintained in vitro for multiple subpassages. This method allowed adequate numbers of cells for in vitro culture studies to evaluate uterine secretion rates, uterine-embryo interactions and a new embryo co-culture system. In a second study, cells were isolated from the uterus and oviducts collected from cattle on day of estrus, on d 4 to 6, d 8 to 10 and d 14 to 16 of the cycle to monitor growth and development following incubation in vitro. The …

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Factors Responsible For The Differential Growth Of Brucella Abortus In Bovine Trophoblasts., Luis Ernesto Samartino Jan 1991

Factors Responsible For The Differential Growth Of Brucella Abortus In Bovine Trophoblasts., Luis Ernesto Samartino

LSU Historical Dissertations and Theses

The interactions of bovine chorionic membrane explants (CAMs) as well as three different bovine trophoblastic cell lines with Brucella abortus were evaluated. The ability of B. abortus to infect and grow within the cells of these CAMs and within these cell lines was measured. In addition, prostanoid and hormone production by the trophoblastic cells after infection with B. abortus was measured. Internalization of B. abortus within the cells of CAMs derived from placentas from both 3-month-gravid cows and 7-month-gravid cows was similar. By 24 hours post-inoculation B. abortus replication in 7-months-derived CAMs was significantly greater than the replication occurring in …

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A Reading Of "A Good Man Is Hard To Find" And "A Curtain Of Green": The Influence Of Parable On Flannery O'Connor And Eudora Welty., Allison Carol Chestnut Jan 1991

A Reading Of "A Good Man Is Hard To Find" And "A Curtain Of Green": The Influence Of Parable On Flannery O'Connor And Eudora Welty., Allison Carol Chestnut

LSU Historical Dissertations and Theses

A Good Man is Hard to Find by Flannery O'Connor and A Curtain of Green by Eudora Welty are short story cycles harmonized by their marked imitation of the style and structure of parable. O'Connor added stories after initially sending the collection to the publisher and then rearranged them accordingly; her work represents a completed cycle. Welty's collection, published in an order different from their individual publications and their original placement in an early typescript, is an arranged cycle. Moreover, parabolic style and structure unify each cycle. A parable typically is a brief story told in the past tense, usually …

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Effects Of Chronic Administration Of Phenylbutazone On Reproduction In The Mare., Mareth Ellsworth Jan 1991

Effects Of Chronic Administration Of Phenylbutazone On Reproduction In The Mare., Mareth Ellsworth

LSU Historical Dissertations and Theses

Phenylbutazone is a non-steroidal anti-inflammatory drug that acts by inhibiting prostaglandin synthesis. Prostaglandins are associated with crucial aspects of reproduction. In 5 experiments, mares were used to test the effects of phenylbutazone on reproduction. In all experiments, treatment was 2 g phenylbutazone or 10 ml physiological saline intravenously(control). In Experiment I, 9 mares were phenylbutazone-treated for 180 consecutive days and teased. Ovaries were palpated and cyclicity was verified by circulating progesterone concentrations. Thirty-six cycles were evaluated. Mares were then divided into treatment and control groups. Estrous mares were artificially inseminated. Non-surgical embryo collection was performed 7 to 8 days post-ovulation. …

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Perceptions Of Performance Appraisal By Cooperative Extension Service Agents In Selected Southern States., William L. Davis Jan 1991

Perceptions Of Performance Appraisal By Cooperative Extension Service Agents In Selected Southern States., William L. Davis

LSU Historical Dissertations and Theses

Appraising the performance of employees is a necessary and vital process in the management of organizations. In the Cooperative Extension System, performance appraisal concerns all employees and influences work, motivation, and ultimately educational program impacts. Perceptions of the present and ideal performance appraisal process were obtained from 558 county agents in six selected southern states. The study focused on agent perceptions of the process, as currently followed and as a desired ideal, to see if there were perceptual differences, and to see if perceptions were influenced by personal characteristics, work characteristics and features of the process itself. The performance appraisal …

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Fluorescence Studies Of Phosphofructokinase From Bacillus Stearothermophilus., Soon-Jong Kim Jan 1991

Fluorescence Studies Of Phosphofructokinase From Bacillus Stearothermophilus., Soon-Jong Kim

LSU Historical Dissertations and Theses

Phosphofructokinase catalyzes the phosphorylation of $\beta$-fructose 6-phosphate (Fru-6-P) to $\beta$-fructose 1,6-bisphosphate. The first part of this dissertation shows that phosphofructokinase from Bacillus stearothermophilus (Bs-PFK) is a tetramer in the region pH 4.5-9.5 unlike the enzymes from mammalian sources, which exhibit association-dissociation reactions. Circular dichroism, steady-state fluorescence, and static and dynamic light scattering were used to study the conformational properties of the enzyme. Inactivation of the enzyme below pH 7.0 is not due to dissociation of the tetramer to dimers or monomers. In the second part, the fluorescence of the lone tryptophan was investigated by steady-state and time-resolved techniques. The decay …

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The Molecular Basis Of Imidazolinone Herbicide Resistance In Arabidopsis Thaliana Var. Columbia., Kanagasabapathi Sathasivan Jan 1991

The Molecular Basis Of Imidazolinone Herbicide Resistance In Arabidopsis Thaliana Var. Columbia., Kanagasabapathi Sathasivan

LSU Historical Dissertations and Theses

Acetolactate synthase (ALS) is a key regulatory enzyme in the biosynthetic pathway of leucine, isoleucine, and valine. ALS is inhibited by four classes of structurally unrelated herbicides viz. sulfonylureas, imidazolinones, triazolopyrimidines, and pyrimidyl-oxy-benzoate. To understand the molecular basis of imidazolinone resistance, the ALS gene was isolated from an imazapyr-resistant mutant GH90 of Arabidopsis thaliana (Haughn and Somerville, 1990. Plant Physiol. 92:1081-1085). DNA sequence analysis of the mutant gene demonstrated a single point mutation from G to A at the 1958th nucleotide of the ALS coding sequence (Sathasivan et al., 1990. Nucl. Acids Res. 18:2188). This would result in serine to …

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The Effects Of Situational Access To Firearms On Sensitivity To Risk Of Criminal Victimization: A Contextual Analysis., Roberta Loupe St. Pierre Jan 1991

The Effects Of Situational Access To Firearms On Sensitivity To Risk Of Criminal Victimization: A Contextual Analysis., Roberta Loupe St. Pierre

LSU Historical Dissertations and Theses

The focus of this research is on the association of the availability of firearms for protection and fear of crime. More specifically, the study explores the relationship of firearms to persons' sensitivity to perceived risk of criminal victimization. The data used were drawn from a state-wide survey of Louisiana residents conducted in 1984. The research was directed by the long-standing inability of researchers to identify any relationship between guns and fear of crime, although it has long been assumed that such a relationship does exist. This study used the innovative strategy of examining fear of crime levels in their relationship …

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Genetics Of Resistance To Preharvest Aflatoxin Accumulation In Maize Containing The Lfy Gene., Daniel Preston Gorman Jan 1991

Genetics Of Resistance To Preharvest Aflatoxin Accumulation In Maize Containing The Lfy Gene., Daniel Preston Gorman

LSU Historical Dissertations and Theses

Preharvest infection of maize (Zea mays L.) grain by Aspergillus flavus Link ex Fries and subsequent aflatoxin contamination is a serious problem, especially in the southeastern USA. Studies on the genetics of resistance to aflatoxin contamination in maize are quite limited, but a better understanding of this aspect is needed for developing resistant germplasm. The objective of the first field study was to determine the genetics of resistance to aflatoxin contamination in maize possessing the leafy (Lfy) gene. Seven Lfy synthetic genotypes were crossed in a diallel fashion, and the resulting 21 single crosses were evaluated for aflatoxin contamination in …

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Isolation And Characterization Of Macrophage Inhibitory Compounds From Mycobacterium Paratuberculosis., Murray Elison Hines Ii Jan 1991

Isolation And Characterization Of Macrophage Inhibitory Compounds From Mycobacterium Paratuberculosis., Murray Elison Hines Ii

LSU Historical Dissertations and Theses

Fractions exhibiting activity detrimental to the killing function of activated bovine monocyte/macrophages towards Candida albicans were obtained from Mycobacterium paratuberculosis. Active fractions were initially derived by ultrasonication of bacterial samples followed by ammonium sulfate precipitation, ion-exchange chromatography, gel filtration chromatography, heat precipitation, acid precipitation and alkali treatment. Two different fractions that exhibited marked inhibition of macrophage killing ability were derived and partially characterized. Novel methodology was developed to accomplish the task of lysis and fractionation of mycobacteria utilizing the Matrix Solid Phase Dispersion (MSPD) technique that appeared to be much more efficient and is certainly less time consuming and less …

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The Use Of Supertitles By American Opera Companies., Christina Margaret Alves Jan 1991

The Use Of Supertitles By American Opera Companies., Christina Margaret Alves

LSU Historical Dissertations and Theses

The main purpose of this monograph was to examine the use of supertitles in foreign language opera by American opera companies. Supertitles are the translation of an opera's text projected simultaneously above the stage during an opera performance. The use of supertitles is one of the most controversial issues in the opera world. Although the primary purpose is to enable the audience to understand a foreign text, there is an ongoing controversy over whether supertitles enhance an opera performance or detract from it. Many opera companies are using supertitles, but there are still those who have not made the investment …

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Poly(Arylene Ether Sulfones): Synthesis, Modifications And Applications., Marietta Navarro Aniano-Ilao Jan 1991

Poly(Arylene Ether Sulfones): Synthesis, Modifications And Applications., Marietta Navarro Aniano-Ilao

LSU Historical Dissertations and Theses

Poly(arylene ether sulfones) were synthesized by aromatic nucleophilic polymerization of the monomers; 4,4$\sp\prime$-biphenol, 4-chlorophenyl sulfone, hydroquinone, and tert-butylhydroquinone. Different conditions of temperature and solvent systems were used to determine the best synthetic approaches for the preparation of poly-(4,4$\sp\prime$-biphenol/4-chlorophenyl sulfone) (1:1), poly-(4-4$\sp\prime$-biphenol/4-chlorophenyl sulfone/hydroquinone) (1:2:1), and poly (4-4$\sp\prime$-biphenol/4-chlorophenyl sulfone/tert-butylhydroquinone) (1:2:1). The use of aprotic high boiling solvent mixtures of N-methyl-2-pyrrolidone (NMP), and N-cyclohexyl-2-pyrrolidone (CHP), facilitated the formation of polymers with structures which can easily be controlled by varying the ratio of monomers, and by varying the concentration of reactants. The polymers were functionalized and modified by silylation, amination and aminomethylation. Directed silylation …

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The Variable Learning Effects Of Two Types Of Intervention On L2 Communication Skills Using Interactive Tasks., Margaret Ann Powers Jan 1991

The Variable Learning Effects Of Two Types Of Intervention On L2 Communication Skills Using Interactive Tasks., Margaret Ann Powers

LSU Historical Dissertations and Theses

This study evaluated the benefits of a task-based procedure used to develop L2 communicative effectiveness in spoken English among a group of advanced proficiency learners. Using two interactive information-exchange map tasks, one diagram task, and two intervening discussion sessions, the study attempted to investigate the actual communicative outcomes of interaction prompted by the tasks and by the interventions. Subjects in three conditions first performed a map task designed with four referential problems which had to be solved to successfully complete the task. Immediately following the map task, the subjects in the first condition participated in a discussion session in which …

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Nuclear Transplantation: Intracellular Release And Extracellular Influx Of Calcium In Response To Electrofusion Pulse And Its Effect On Murine Oocyte Activation And Embryonic Development., Lee F. Rickords Jan 1991

Nuclear Transplantation: Intracellular Release And Extracellular Influx Of Calcium In Response To Electrofusion Pulse And Its Effect On Murine Oocyte Activation And Embryonic Development., Lee F. Rickords

LSU Historical Dissertations and Theses

The transplantation of early embryonic cell nuclei into oocytes in which the maternal chromosomes have been removed is a method by which multiple offspring of the same genotype can be produced. One critical factor required for successful development of nuclear transfer derived embryos is inducing the release of the recipient ooplasm from meiotic arrest (activation). This is accomplished during fusion of the two cells. The DC electrofusion pulse used to fuse the two cells together also activates the recipient ooplasm to resume meiotic events, however, the efficiency of electrofusion pulse induced activation remains low. It is known that activation of …

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The Differential Effects Of Either X-Irradiation Or Thermal Stress On The Two Major Cell Types Of The Blastocyst Stage Murine Embryo., Joe Steve Capehart Jan 1991

The Differential Effects Of Either X-Irradiation Or Thermal Stress On The Two Major Cell Types Of The Blastocyst Stage Murine Embryo., Joe Steve Capehart

LSU Historical Dissertations and Theses

The first objective of this investigation was to determine if either X-irradiation or thermal stress exerted differential effects on the two major cell types of the blastocyst stage murine embryo. Results of this study indicate that X-irradiation dosages of 0 rads, 500 rads, 600 rads, 700 rads, 800 rads, 900 rads or 1000 rads had no effect on the ability of treated embryos to either hatch or develop into trophoblastic outgrowths (P $<$.05). In contrast, X-irradiation treatment over the levels tested did have a detrimental effect on the ability of embryos to develop into trophblastic outgrowths possessing an ICM region (P $>$.05). X-irradiation over the levels tested had no effect on the mean two-dimensional outgrowth surface areas ($\mu$m$\sp2$) (P $>$.05). However, X-irradiation was found to have a …

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Study On Two Chitin-Binding Proteins From Vibrio Parahaemolyticus., Otto Silva Gildemeister Jan 1991

Study On Two Chitin-Binding Proteins From Vibrio Parahaemolyticus., Otto Silva Gildemeister

LSU Historical Dissertations and Theses

Two chitin-binding proteins from Vibrio parahaemolyticus are secreted into the culture medium after the addition of chitin or oligomers of N-acetylglucosamine, but only to lower levels of expression with a few other saccharides. The first protein exhibited a very salt-resistant chitinase activity with activity maxima at pH 6 and 9. The enzyme is stable for 30 minutes at 40$\sp\circ$C, and maximal activity is reached at 50$\sp\circ$C. The chitinase hydrolyzes optimally chitin oligomer substrates with degree of polymerization of 4 and higher. The hydrolytic activity upon the chitotrimer is low; the dimer cannot be hydrolyzed by the enzyme. When incubated with …

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Characterization And Potential Utilization Of Proteases From The Hepatopancreas Of Crawfish, Procambarus Clarkii., Hyeung-Rak Kim Jan 1991

Characterization And Potential Utilization Of Proteases From The Hepatopancreas Of Crawfish, Procambarus Clarkii., Hyeung-Rak Kim

LSU Historical Dissertations and Theses

Four electrophoretically homogenous anionic trypsins, tentatively named trypsin A, B, C, and D, were isolated from crawfish hepatopancreas. Purity was increased 56, 100, 87, and 64-fold with approximately 2.4, 8.1, 5.1, and 3.0% yield for trypsin A, B, C, and D, respectively. The molecular weights of trypsin A, B, C, and D were estimated to be 23,800, 27,900, 24,800, and 31,400, respectively, using Sephacryl S-200 gel filtration. Isoelectric points and amino acid profiles of the trypsins were similar. Caseinolytic activity was consistently highest between pH 5.5 and 10.0 for all trypsins. Amidolytic and esterolytic activities were maximum in a narrower …

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Effects Of Alternative Protein And Fat Payment Plans On Production Variables And Returns In Louisiana Dairy Herds., Leonder Labbe Jan 1991

Effects Of Alternative Protein And Fat Payment Plans On Production Variables And Returns In Louisiana Dairy Herds., Leonder Labbe

LSU Historical Dissertations and Theses

Multiple linear regression was used to compare the impact of proposed multiple component milk pricing systems with the present milk pricing system for Louisiana Holstein herds on DHIA. Dependent variables were milk yield, fat yield, protein yield, six income over feed cost pricing systems, and six product value pricing systems. Independent variables were herd, year, and month as class variables and 18 production variables. Data were 16,675 herd-year-month observations of Louisiana Holsteins from DHIA monthly Herd Summary DHI-202 computer files. Pricing data was standardized using prices form the New Orleans - Mississippi Federal Milk Marketing Order 1094, Zone 1. The …

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Functional Morphology Of Gustatory Centers In The Brain Of The Channel Catfish, Ictalurus Punctatus., Charles Franklin Lamb Iv Jan 1991

Functional Morphology Of Gustatory Centers In The Brain Of The Channel Catfish, Ictalurus Punctatus., Charles Franklin Lamb Iv

LSU Historical Dissertations and Theses

Gustatory nuclei in the isthmic region of the metencephalon and in the posterior diencephalon of the channel catfish, Ictalurus punctatus, were examined anatomically and electrophysiologically. Neurons in the superior secondary gustatory nucleus (nGS) responded to taste and tactile stimulation of large peripheral receptive fields (RFs) that often included the epithelia of the oropharyngeal cavity and whole extraoral body surface. Taste responses to amino acids and nucleotides were dose-dependent, with detected thresholds from micromolar to millimolar concentrations. The RF organization within the nGS did not display the somatotopy present in the medullary gustatory nuclei. Anatomical labeling of secondary gustatory fibers showed …

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Chromium, Tryptophan, And Picolinate In Diets For Pigs And Poultry., Timothy Guinn Page Jan 1991

Chromium, Tryptophan, And Picolinate In Diets For Pigs And Poultry., Timothy Guinn Page

LSU Historical Dissertations and Theses

Six experiments were conducted to evaluate the effects of supplemental dietary tryptophan (TRP), picolinate (Pic), CrCl$\sb3\cdot$6H$\sb2$O, chromium picolinate (CrPic), or a combination of Pic and CrCl$\sb3\cdot$6H$\sb2$O on growth performance, liver mineral concentrations, insulin, growth hormone, organ weights, and serum and carcass traits of pigs. One experiment was conducted to evaluate the effect of chromium picolinate (CrPic) on serum cholesterol (CH), egg CH, egg quality, and egg production of laying hens. Dietary TRP, Pic, CrCl$\sb3\cdot$6H$\sb2$O, and a combination of Pic and CrCl$\sb3\cdot$6H$\sb2$O did not affect growth performance, liver mineral concentrations, insulin, growth hormone, and serum and carcass traits of pigs. The …

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