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Influence Of Storage Temperature And Duration On Deterioration Of Film-Wrapped And Non-Wrapped Mustard, Brassica Juncea Coss., Regina Poillion Bracy Jan 1990

Influence Of Storage Temperature And Duration On Deterioration Of Film-Wrapped And Non-Wrapped Mustard, Brassica Juncea Coss., Regina Poillion Bracy

LSU Historical Dissertations and Theses

Mustard "greens' is a popular fresh vegetable, especially in the South. Fresh market production, however, is restricted to local sales or short-distance markets due to the relatively short shelf life of mustard. Packaging has been shown to successfully extend the shelf life of several fruits and vegetables. To determine the effect of packaging and storage temperature on the postharvest life and quality of mustard, mustard was stored at 1, 4, and 15C in perforated polyethylene bags, Cryovac D-955 60-gauge or 100-guage heat-shrinkable films or not-wrapped. A preliminary experiment was conducted with spinach to develop experiment methodology and for comparison of …

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Estimation Of Additive And Heterotic Direct And Maternal Genetic Effects For Carcass Traits In Beef Steers., Sidney Marc Derouen Jan 1990

Estimation Of Additive And Heterotic Direct And Maternal Genetic Effects For Carcass Traits In Beef Steers., Sidney Marc Derouen

LSU Historical Dissertations and Theses

Carcass measurements were taken on straightbred and crossbred steers to estimate least squares means and heterosis (1,494 steers) and, to partition additive and heterotic genetic effects (1,536 steers) on hot carcass weight (HCWT), retail yield (YIELD), ribeye area (REA), fat thickness (FT), marbling score (MS) and Warner-Bratzler shear (WBS). Steers were produced over four generations in a rotational crossbreeding study and consisted of Angus (A), Brahman (B), Charolais (C) and Hereford (H) breeds. Two-, three- and four-breed rotation systems were generated with the restriction that each breed combination include the B. Straightbreds were maintained as controls. Treatment, mating system and …

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Studies On Important Volatile Flavor Components In Louisiana Rangia Clam (Rangia Cuneata)., Uraiwan Tanchotikul Jan 1990

Studies On Important Volatile Flavor Components In Louisiana Rangia Clam (Rangia Cuneata)., Uraiwan Tanchotikul

LSU Historical Dissertations and Theses

Important flavor components in Louisiana brackish water clam (Rangia cuneata) were investigated in this dissertation research. Major achievements include: (1) positive identification of the major compound responsible for the objectionable musty/earthy off-flavor in the clam, (2) development of quantitative method to compare the levels of the off-flavor compound in clam samples before and after relaying, and (3) identification of desirable characteristic clam volatile flavor components. The identification of the musty/earthy off-flavor of rangia clam was accomplished by using dynamic headspace sampling (DHS) coupled with high resolution gas chromatography/mass spectrometry (HRGC/MS) in selective ion monitoring (SIM) mode and HRGC aroma perception. …

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Using The Domestic Chicken Egg For Culturing Preimplantation Mammalian Embryos., Eldred Griffin Blakewood Jan 1990

Using The Domestic Chicken Egg For Culturing Preimplantation Mammalian Embryos., Eldred Griffin Blakewood

LSU Historical Dissertations and Theses

A novel embryo culture system has been developed using 96-hour chick embryos. One to four mammalian embryos can be injected into the chick embryo amnion (CEA) and allowed to develop for 72 to 96 hours. Pronuclear-stage mouse embryos from two different strains were cultured in the CEA or in Whitten's medium. There were more expanded blastocysts from one strain of embryos when cultured in the CEA. More hatched blastocysts resulted from embryos of both strains when cultured in the CEA. Two to eight-cell goat embryos cultured in the CEA for 72 hours or on cell monolayers reached to blastocyst stage …

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The Introduction Of A Gene Encoding A Novel Peptide Into Plants To Increase Plant Bacterial Resistance., Pablito Garcia Nagpala Jan 1990

The Introduction Of A Gene Encoding A Novel Peptide Into Plants To Increase Plant Bacterial Resistance., Pablito Garcia Nagpala

LSU Historical Dissertations and Theses

A 38 amino acid long peptide, Shiva-1, was designed and chemically synthesized in our laboratory. Shiva-1 has only 46% amino acid homology with the naturally occurring lytic peptide from Hyalophora cecropia, known as Cecropin B. However, hydrophobic properties and charge density of the natural molecule were conserved at 100% in the synthetic peptide. This novel peptide was shown to be capable of killing a number of different species of plant pathogenic bacteria at nanomolar concentrations. Comparative studies show that Shiva-1 is more effective in this bacteriolytic activity than Cecropin B. The gene for Shiva-1 was chemically synthesized and cloned into …

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The Design And Expression Of A Synthetic Gene Encoding A Novel Polypeptide To Enhance The Quality Of Plant Protein., Jaeho Kim Jan 1990

The Design And Expression Of A Synthetic Gene Encoding A Novel Polypeptide To Enhance The Quality Of Plant Protein., Jaeho Kim

LSU Historical Dissertations and Theses

A novel protein (HEAAE II, High Essential Amino Acid Encoding Protein), rich in essential amino acids (75% of total), was designed and constructed in our laboratory. The monomeric form of the protein consists of 20 amino acid residues with four additional amino acids comprising a potential $\beta$-turn. Circular dichroism and size exclusion analysis demonstrated, that the monomer exists in a stable $\alpha$-helical conformation that self-aggregates in aqueous solution to form higher ordered multimeric structures, which are very reminiscent of natural plant storage proteins. The DNA encoding this amino acid sequence was synthesized, and from this monomeric gene fragment, the tetrameric …

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Evaluation Of The Crawfish Chitin-Carotenoid Complex And Its Nutritional/Pigmentation Effect In Poultry Diets., Keun Soo Lee Jan 1990

Evaluation Of The Crawfish Chitin-Carotenoid Complex And Its Nutritional/Pigmentation Effect In Poultry Diets., Keun Soo Lee

LSU Historical Dissertations and Theses

The present investigation involved utilization of the chitin-carotenoid complex and the whole meal derived from crayfish (Procambarus clarkii) composite byproduct, in controlled broiler diets to determine the biological value of these substrates as potential sources of growth promoters, red intensifying agents, and protein supplements. Included are basic studies of the unique characteristics of the chitin-protein and chitin-carotenoid complexes. The crawfish chitin-carotenoid substrate did not exhibit any deleterious effects on broiler growth performance in terms of animal weight gain and feed efficiency at levels up to 5% of the total diet. Controlled chitin addition to the diet indicated no apparent relationship …

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Evaluation Of Aeromonas Hydrophila Virulence Factors: Role In Natural Epizootics And Their Use As Potential Immunogens., Larisa Ann Ford Jan 1990

Evaluation Of Aeromonas Hydrophila Virulence Factors: Role In Natural Epizootics And Their Use As Potential Immunogens., Larisa Ann Ford

LSU Historical Dissertations and Theses

Aeromonas hydrophila and A. sobria have been identified as major causes of mortalities among commercially raised channel catfish and are the cause of septicemic diseases in a wide variety of other animals. At present, antibiotic therapy is the only prescribed treatment for Motile Aeromonad Septicemia (HAS) in channel catfish. Antibiotic treatment, however, is expensive and often not effective due to the development of resistance in the bacterial strains. Development of immunoprophylatic methods for the prevention of HAS would be of value and use to the commercial catfish industry. Several studies have demonstrated that whole cell vaccine preparations do not confer …

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Management Of Tobacco Budworm, Heliothis Virescens (F.) And Bollworm, Helicoverpa Zea (Boddie) In Cotton: Host Plant Resistance And Ovicidal Approaches., Billy Rogers Leonard Jan 1990

Management Of Tobacco Budworm, Heliothis Virescens (F.) And Bollworm, Helicoverpa Zea (Boddie) In Cotton: Host Plant Resistance And Ovicidal Approaches., Billy Rogers Leonard

LSU Historical Dissertations and Theses

Growth, development and survival of pyrethroid-resistant (PY-R) and -susceptible (PY-S and FIELD-88) tobacco budworm, Heliothis virescens (F.), and bollworm (CORN-BW), Helicoverpa zea (Boddie), were compared on four cotton lines ('Deltapine 41', La. HG-660, La. HG-063 and PD-0804) and artificial diet. The FIELD-88 and CORN-BW strains had significantly higher 5 and 9 day larval weights compared to the PY-R and PY-S laboratory strains. Larvae fed squares of La. HG-660 and La. HG-063 had significantly lower larval and pupal weights, required significantly more days to pupate and had higher cumulative mortality compared to those reared on squares of a commercial cultivar, Deltapine …

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Louisiana Agriculture Magazine, Fall 1989, Lsu Agricultural Experiment Station Oct 1989

Louisiana Agriculture Magazine, Fall 1989, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

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Nitrogen Fixation In Beggiatoa, Vitreoscilla, And Thiothrix., James Kevin Polman Jan 1989

Nitrogen Fixation In Beggiatoa, Vitreoscilla, And Thiothrix., James Kevin Polman

LSU Historical Dissertations and Theses

Many strains of Beggiatoa, Vitreoscilla, and Thiothrix were found to be capable of nitrogen fixation and to harbor plasmid DNA of various sizes, including large plasmids, and several plasmids in the 12 to 15 Mdal size range. Nitrogenase induction and activity in Beggiatoa alba were studied with respect to the effects of oxygen, pH, temperature, and nitrogenous compounds. Induction required microaerobic conditions. Nitrate and nitrite repressed induction, but glutamine did not. A pH optimum of 6.5 to 8.0 and a temperature optimum of 29$\sp\circ$C were observed. Nitrogenase activity was immediately and incompletely inhibited by ammonium, but was not inhibited by …

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Adolescent Alcohol Expectancies And Alcohol Use As Functions Of Familial Factors., Andrew Ward Millar Jan 1989

Adolescent Alcohol Expectancies And Alcohol Use As Functions Of Familial Factors., Andrew Ward Millar

LSU Historical Dissertations and Theses

In an extension of Brown, Creamer and Stetson (1987), this study investigated the relationships between components of family life, adolescent drinking and alcohol expectancies. Alcohol expectancies are defined as the learned associations between alcohol consumption and the results of drinking. Out of 73 adolescent (12- to 18-year old) subjects screened, 55 met criteria and participated in two comparisons with multiple dependent variables. In the first of these, 15 subjects who were exposed to alcoholics for at least 75% of their lives were found to have stronger expectations that alcohol would provide cognitive and motor enhancement than did 15 matched subjects …

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Eight Major Species Of Southern Oaks: A Bibliography, 1876-1987, Shih-Chang Hu Jan 1989

Eight Major Species Of Southern Oaks: A Bibliography, 1876-1987, Shih-Chang Hu

LSU Agricultural Experiment Station Reports

No abstract provided.

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Comparison Of Hybrid Bermudagrasses For Stocker Steer Production In North Louisiana, B B. Greene Jan 1989

Comparison Of Hybrid Bermudagrasses For Stocker Steer Production In North Louisiana, B B. Greene

LSU Agricultural Experiment Station Reports

No abstract provided.

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Influence Of Shade And Supplemental Protein And Energy On Steer Performance And Digestibility Of Coastal Bermudagrass Diets, T Wayne White Jan 1989

Influence Of Shade And Supplemental Protein And Energy On Steer Performance And Digestibility Of Coastal Bermudagrass Diets, T Wayne White

LSU Agricultural Experiment Station Reports

No abstract provided.

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Evaluation Of Bermudagrasses In South Louisiana On Recent Alluvial Soil, R N. Gates Jan 1989

Evaluation Of Bermudagrasses In South Louisiana On Recent Alluvial Soil, R N. Gates

LSU Agricultural Experiment Station Reports

No abstract provided.

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Double Cropping Crawfish With Sorghum In Louisiana, Martin W. Brunson Jan 1989

Double Cropping Crawfish With Sorghum In Louisiana, Martin W. Brunson

LSU Agricultural Experiment Station Reports

No abstract provided.

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Green Ash (Fraxinus Pennsylvanica Marsh.): A Bibliography, 1897-1987, Shih-Chang Hu Jan 1989

Green Ash (Fraxinus Pennsylvanica Marsh.): A Bibliography, 1897-1987, Shih-Chang Hu

LSU Agricultural Experiment Station Reports

No abstract provided.

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American Sycamore (Plantanus Occidentalis L.): A Bibliography, 1911-1987, Shih-Chang Hu Jan 1989

American Sycamore (Plantanus Occidentalis L.): A Bibliography, 1911-1987, Shih-Chang Hu

LSU Agricultural Experiment Station Reports

No abstract provided.

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Louisiana Agriculture Magazine, Winter 1989-1990, Lsu Agricultural Experiment Station Jan 1989

Louisiana Agriculture Magazine, Winter 1989-1990, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

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Comparison Of Ascorbic Acid Content Of Super‐Market Versus Roadside Stand Produce, R. J. Bushway, P. R. Helper, J. King, B. Perkins, M. Krishnan Jan 1989

Comparison Of Ascorbic Acid Content Of Super‐Market Versus Roadside Stand Produce, R. J. Bushway, P. R. Helper, J. King, B. Perkins, M. Krishnan

Faculty Publications

Seven vegetables and one fruit from two roadside stands and two major local supermarkets were analyzed for their ascorbic acid content. Produce was sampled during a nine week period from late July through September of 1987. Significant differences at the 0.05 level for ascorbic acid were observed between supermarket and roadside stand produce for potato, cauliflower, cabbage and tomato while no significant differences were found between cantaloupe, broccoli, green peppers and spinach from either market. Cabbage was the only supermarket item that was significantly higher in ascorbic acid concentration. Very little dehydroascorbic acid was shown to be present in these …

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Mastitis In Unbred And Primigravid Dairy Heifers., Pedro Trinidad Jan 1989

Mastitis In Unbred And Primigravid Dairy Heifers., Pedro Trinidad

LSU Historical Dissertations and Theses

Prevalence of mastitis and efficacy of intramammary treatment were determined in unbred and primigravid heifers (n = 116) from 4 dairy herds. Of 97 heifers from which secretion samples were obtained, intramammary infections were detected in 96.9% of animals and 74.6% of quarters. Clinical symptoms were observed in 29% of heifers. Staphylococcus aureus infections were detected in 37.1% of animals. Teat canal colonizations were confirmed in 93.1% of heifers and 70.7% of quarters. The most common isolates from mammary glands were Staphylococcus chromogenes, Staphylococcus hyicus, and Staphylococcus aureus. Average somatic cell counts in secretion from infected and uninfected quarters were …

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The Relation Of Compliance To Quality Of Life In Dialysis Patients., Linda S. Dietz Jan 1989

The Relation Of Compliance To Quality Of Life In Dialysis Patients., Linda S. Dietz

LSU Historical Dissertations and Theses

The goal of the current study was to gain knowledge of the impact that dietary compliance has on quality of life for end-stage renal disease patients receiving chronic in-center hemodialysis. As a result of this type of research, health care professionals may better understand the individual and collective influence that various aspects of dietary compliance have on quality of life. This knowledge may be helpful in making future recommendations about the necessity of the dietary regimen. This study investigated the relation between three commonly employed physiological parameters of dietary compliance (blood urea nitrogen, potassium, and intersession weight gain) and four …

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Rice Bran Stabilization By Improved Internal And External Heating Methods., Jiaxun Tao Jan 1989

Rice Bran Stabilization By Improved Internal And External Heating Methods., Jiaxun Tao

LSU Historical Dissertations and Theses

Rice bran stabilization was conducted by internal (microwave), external (oven drying and steam retorting) heating and non-heating ($\sp{60}$Co irradiation) treatments to improve currently used methods. Two commercial rice varieties cultivated in Louisiana, one long grain (Lemont) and a medium grain (Nato), were milled to collect bran samples. The bran was analyzed for its proximate composition and various physical and thermal characteristics. The proximate composition for long and medium grain bran, respectively, was: moisture, 11.2% and 10.8%; protein, 16.07% and 16.20%; fat, 19.20% and 21.97%; crude fiber, 8.49% and 8.41%; ash, 9.23% and 9.46%; and nitrogen-free extract, 47.01% and 44.07%. Physical …

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To Be West Indian: Autobiography And West Indian Literature., Margaret Kent Bass Jan 1989

To Be West Indian: Autobiography And West Indian Literature., Margaret Kent Bass

LSU Historical Dissertations and Theses

Although some critics claim that autobiography is not a West Indian literary mode, I maintain that autobiography, of a special West Indian variety, is necessarily present, for it provides a way of defining the self and bringing the parts of the self together into a unified and coherent whole. Autobiography is the genre that oppressed and colonized populations have traditionally used to write themselves into history and to proclaim their humanity to the world. The writing of autobiography is essential to the process of decolonization, for the colonized must define themselves and recreate themselves in their own images thereby resisting …

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Kinetics Of Chromate And Phosphate Sorption By Oxide Minerals And Soils., David S. Burden Jan 1989

Kinetics Of Chromate And Phosphate Sorption By Oxide Minerals And Soils., David S. Burden

LSU Historical Dissertations and Theses

A nonlinear multireaction model was used to describe kinetic retention data sets for chromate, phosphate, arsenate, borate, fluoride, molybdate, selenite, and silicate by goethite, an iron oxide mineral, and selected soils. These data sets were obtained from laboratory batch experiments with time up to 24 h. Either a three-parameter version of the model consisting of one nonlinear reversible and one first order irreversible reaction, or a five-parameter version consisting of two nonlinear reversible and one first order irreversible reactions was capable of predicting anion sorption by goethite. A mechanistic model consistent with the nonlinear multireaction approach was also proposed in …

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The Affective Variant Hypothesis: How Is Bulimia Nervosa Related To Depression?, Rita C. Prather Jan 1989

The Affective Variant Hypothesis: How Is Bulimia Nervosa Related To Depression?, Rita C. Prather

LSU Historical Dissertations and Theses

Bulimia nervosa patients frequently score from mild to severe on measures of depressive symptoms. This association between bulimia nervosa and depression led some researchers to hypothesize that bulimia nervosa is a variant of the affective disorder of depression. The main purpose of this study was to provide further evaluation of the affective variant hypothesis of bulimia nervosa. It was postulated that bulimia nervosa patients with and without depression would differ from each other and from depressives without eating disorders on specific measures of cognitive, behavioral, and somatic symptoms associated with depression. Secondly, it was hypothesized that the nondepressed and depressed …

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The Effectiveness Of The Food And Nutrition 4-H Project In Improving Dietary Practices And Food Consumption Patterns Of High School Students In Louisiana., Saralene Brandon Seals Jan 1989

The Effectiveness Of The Food And Nutrition 4-H Project In Improving Dietary Practices And Food Consumption Patterns Of High School Students In Louisiana., Saralene Brandon Seals

LSU Historical Dissertations and Theses

The primary purpose of this study was to determine the effectiveness of the 4-H Foods and Nutrition project in Louisiana. The Foods and Nutrition project traditionally enrolls about one-fourth of the total membership. A second purpose of the study was to identify personal and household demographic characteristics that may influence dietary practices and food consumption patterns. Telephone interviews were conducted by extension home economists with a random sample of 277 4-H Foods and Nutrition project members ages 14-19 and 278 non-4-H members. The 4-H Foods and Nutrition program appears to be making a positive impact on 4-H project members' dietary …

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Evaluation Of Fish Meal Supplement On Physiological Response And Milking Performance In Lactating Dairy Cattle Under Heat Stress., George Mark Toups Jan 1989

Evaluation Of Fish Meal Supplement On Physiological Response And Milking Performance In Lactating Dairy Cattle Under Heat Stress., George Mark Toups

LSU Historical Dissertations and Theses

Twenty-four mid-lactation heat stressed dairy cows were paired in a completely randomized block design on basis of breed, age, lactation number, calving date, previous mild production and milk fat content in order to evaluate experimental responses. Test treatment was a 50:50 dry matter (DM) corn silage-concentrate diet supplemented with 4.75% DM specially-selected fish meal (FM). Animals were housed under natural summer conditions for the duration of a 70-d experimental period, commencing in mid-June. Low roughage diets were slightly below NRC requirements for both energy and crude protein. DM intake, milk fat content, and milk fat:milk lactose ratio were statistically significant, …

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Induction Of Polyploidy In Ictalurid Catfish And Comparative Performance Of Diploid And Triploid Channel Catfish And Channel X Blue Catfish Hybrids., Craig Gustaf Lilyestrom Jan 1989

Induction Of Polyploidy In Ictalurid Catfish And Comparative Performance Of Diploid And Triploid Channel Catfish And Channel X Blue Catfish Hybrids., Craig Gustaf Lilyestrom

LSU Historical Dissertations and Theses

This study provided indications of the feasibility of inducing polyploidy in ictalurids (channel catfish, Ictalurus punctatus, and hybrids with blue catfish, I. furcatus) by temperature or hydrostatic pressure shocks as well as the potential for improvement of growth and processing traits in triploid channel catfish x blue catfish hybrids. One-cell embryos of ictalurid catfish were subjected to either temperature or hydrostatic pressure shocks for induction of triploidy or tetraploidy. Hatch rates of embryos treated for induction of tetraploidy with hydrostatic pressure shocks were lower than those treated for induction of tetraploidy with heat shocks. Hatch rates of embryos tested for …

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