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Plant Protein Improvement By Genetic Engineering: Use Of Synthetic Genes., Moon Sik Yang Jan 1988

Plant Protein Improvement By Genetic Engineering: Use Of Synthetic Genes., Moon Sik Yang

LSU Historical Dissertations and Theses

The essential amino acid composition of plant foodstuffs is very important, especially in the developing countries where people very heavily depend on plant proteins from a single source. In these situations, it would be highly beneficial to 'engineer' the plant to produce proteins with a balanced essential amino acid content. Recombinant DNA technology and Agrobacterium-based vector systems offer a novel approach to modify plant proteins. Several attempts with some encouraging results have been made to express plant storage protein genes in transgenic plants. However, improvement of the quality of plant protein using these techniques is in an early stage. In …

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Information Acquisition And Decision-Making In Creditors' Decision Environment., Pao-Chuan Lin Jan 1988

Information Acquisition And Decision-Making In Creditors' Decision Environment., Pao-Chuan Lin

LSU Historical Dissertations and Theses

This study identified the financial information used by the loan officers in a commercial lending context. The identification of information acquisition made it possible for the researcher to verify whether the manipulated financial information in the experiment was processed by the subjects. As a consequence, the inference concerning the impact of the treatment on loan officers' decisions could be more conclusive. Most real decision tasks are similar to a situation in which the decision maker has to search for and decide which information to use rather than conforming to an a priori decision model specified by the researcher. The subjects …

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Dynamic Headspace Sampling And Chromatographic And Mass Spectrometric Investigations Of Volatile Flavor Components In Red Swamp Crayfish (Procambarus Clarkii) Hepatopancreatic Tissue., Stephen S. Williams Jan 1988

Dynamic Headspace Sampling And Chromatographic And Mass Spectrometric Investigations Of Volatile Flavor Components In Red Swamp Crayfish (Procambarus Clarkii) Hepatopancreatic Tissue., Stephen S. Williams

LSU Historical Dissertations and Theses

This analytical food flavor study concentrated on the development and application of improved analytical techniques to investigate volatile flavor components in crayfish (Procambarus clarkii) hepatopancreatic tissue. This work consisted of four main parts. The first part dealt with the development of an improved dynamic headspace sampling procedure for the sampling and concentration of volatile flavor components in the headspace of high moisture foods. The second section described the successful application of this improved procedure for chromatographic and mass spectrometric investigation of dynamic headspace volatile flavor components of crayfish hepatopancreatic tissue. The third part discussed the quantitative determination of these volatile …

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Bioenergetics Of Red Swamp Crawfish (Procambarus Clarkii) And White River Crawfish (Procambarus Acutus Acutus) In Cultivated, Noncultivated And Wooded Ponds In South Louisiana., Mattana Sanguanruang Jan 1988

Bioenergetics Of Red Swamp Crawfish (Procambarus Clarkii) And White River Crawfish (Procambarus Acutus Acutus) In Cultivated, Noncultivated And Wooded Ponds In South Louisiana., Mattana Sanguanruang

LSU Historical Dissertations and Theses

Stomach content analysis and stable carbon isotope ratios were used to determine diet and food assimilation of red swamp crawfish (Procambarus clarkii) and white river crawfish (Procambarus acutus acutus) in three types of commercial ponds. Crawfish stomachs contained largely macrophytes, detritus and leaf litter, and to a lesser extent aquatic insects and zooplankton. Food habits of P. clarkii and P. acutus acutus were similar, but P. acutus acutus consumed more animal material than did P. clarkii. Food habits were similar among different sizes of P. clarkii and P. acutus acutus. Seasonal stable carbon isotope ratios ($\delta\sp{13}$C) of P. clarkii and …

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Louisiana Agriculture Magazine, Summer 1987, Lsu Agricultural Experiment Station Jul 1987

Louisiana Agriculture Magazine, Summer 1987, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

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Structure And Expression Of The Saccharomyces Cerevisiae Cry1 Gene: A Highly Conserved Ribosomal Protein Gene, J. C. Larkin, J. R. Thompson, J. L. Woolford Jan 1987

Structure And Expression Of The Saccharomyces Cerevisiae Cry1 Gene: A Highly Conserved Ribosomal Protein Gene, J. C. Larkin, J. R. Thompson, J. L. Woolford

Faculty Publications

No abstract provided.

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Conditioning Of Ryegrass For Faster Drying, M Tsang Mui Chung Jan 1987

Conditioning Of Ryegrass For Faster Drying, M Tsang Mui Chung

LSU Agricultural Experiment Station Reports

No abstract provided.

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Effects Of Calving Season And Stocking Rate On Beef Cow-Calf Productivity, C P. Bagley Jan 1987

Effects Of Calving Season And Stocking Rate On Beef Cow-Calf Productivity, C P. Bagley

LSU Agricultural Experiment Station Reports

No abstract provided.

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Effects Of High-Moisture Ryegrass Hay Ammoniation On Quality Preservation, Billy D. Nelson Jan 1987

Effects Of High-Moisture Ryegrass Hay Ammoniation On Quality Preservation, Billy D. Nelson

LSU Agricultural Experiment Station Reports

No abstract provided.

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Nitrogen Fertilization Influences On Cotton Yields, Petiole Nitrate Concentrations, And Residual Soil Nitrate Levels At The Macon Ridge, Northeast, And Red River Research Stations, S A. Phillips Jan 1987

Nitrogen Fertilization Influences On Cotton Yields, Petiole Nitrate Concentrations, And Residual Soil Nitrate Levels At The Macon Ridge, Northeast, And Red River Research Stations, S A. Phillips

LSU Agricultural Experiment Station Reports

No abstract provided.

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Effects Of Fertilizer Potassium On Coastal Bermudagrass Grown On Coastal Plain Soil, W R. Odson Jan 1987

Effects Of Fertilizer Potassium On Coastal Bermudagrass Grown On Coastal Plain Soil, W R. Odson

LSU Agricultural Experiment Station Reports

No abstract provided.

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Year-Round Production Of Slaughter Beef Using Optimum Levels Of Forages, C P. Bagley Jan 1987

Year-Round Production Of Slaughter Beef Using Optimum Levels Of Forages, C P. Bagley

LSU Agricultural Experiment Station Reports

No abstract provided.

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Plant-Tissue Analysis As A Diagnostic Aid In Crop Production, J E. Sedberry Jan 1987

Plant-Tissue Analysis As A Diagnostic Aid In Crop Production, J E. Sedberry

LSU Agricultural Experiment Station Reports

No abstract provided.

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An Analysis Of Management Practices---Louisiana Sheep Producers Association, 1986., Terry Lee Dumas Jan 1987

An Analysis Of Management Practices---Louisiana Sheep Producers Association, 1986., Terry Lee Dumas

LSU Historical Dissertations and Theses

The objectives of this study were: (1) To develop a personal profile of the membership of the Louisiana Sheep Producers Association (LSPA). (2) To determine the relationship between flock management practices followed by members of LSPA and their purpose for producing, size of operation, age and education. (3) To determine the educational needs in sheep production. The data were obtained by a mail questionnaire sent to 275 of the 304 members of LSPA. A total of 189 members engaged in sheep production returned the surveys. Chi-square, analysis of variance and correlation analysis was used to determine statistically significant relationships (.05 …

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In Vitro Regeneration And Protein Changes Associated With Two Cultivars Of Agrostis Palustris Huds. Cultured Under High Sodium-Chloride Conditions., John Casper Hovanesian Jan 1987

In Vitro Regeneration And Protein Changes Associated With Two Cultivars Of Agrostis Palustris Huds. Cultured Under High Sodium-Chloride Conditions., John Casper Hovanesian

LSU Historical Dissertations and Theses

Calli from 'Penneagle' and 'Seaside' creeping bentgrass (Agrostis palustris Huds.) were selected for enhanced ability to proliferate on media supplemented with 514 mM NaCl. Based on dry matter production and vigor, growth of plants regenerated from NaCl-adapted calli of both cultivars in saline hydroponic nutrient medium, was superior to that of plants regenerated from non-adapted calli. At 257 mM NaCl, plants from NaCl-sensitive calli died or were unable to produce measurable dry matter whereas plants from NcCl-adapted calli grew well. Growth of plants from NaCl-adapted calli was inhibited at 340 mM NaCl. At 514 mM NaCl, resistant plants no longer …

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Management Of Rhizoctonia Aerial Blight Of Soybean And Biology Of Sclerotia Of Rhizoctonia Solani Kuhn (Louisiana)., Gary Fischer Joye Jan 1987

Management Of Rhizoctonia Aerial Blight Of Soybean And Biology Of Sclerotia Of Rhizoctonia Solani Kuhn (Louisiana)., Gary Fischer Joye

LSU Historical Dissertations and Theses

Rhizoctonia Aerial Blight (RAB) has caused severe damage on susceptible soybean cultivars throughout the southern soybean growing areas in Louisiana and the southeastern United States. During the 1983, 1984, and 1985 growing seasons, several greenhouse and field experiments were conducted to determine the influence of cultural practices (row spacings, plant populations, potassium fertilizer rates, and fungicide treatments) on RAB. A row spacing of 25 cm resulted in higher yields than row spacings of 50, 75, or 100 cm, regardless of disease rating. After the crop canopy had reached its maximum density, disease ratings were not significantly different between row spacings …

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Feeding And Microspatial Relationships Of Meiobenthic Harpacticoid Copepods With Microbial Flora., Alan William Decho Jan 1987

Feeding And Microspatial Relationships Of Meiobenthic Harpacticoid Copepods With Microbial Flora., Alan William Decho

LSU Historical Dissertations and Theses

Feeding processes and their relationship to microspatial patterns were examined for several harpacticoid species. Field evidences and laboratory radiolabel experiments suggest that diatoms comprise a major portion of the food resources ingested by harpacticoids. Bacteria and mucus-exopolymer secretions (associated with the bacteria and diatoms) are also ingested, coincidently while ingesting diatoms. Also, significant ontogenetic shifts in food resource utilization occur from naupliar to adult stages. Field grazing rate studies were conducted on an intertidal mudflat over different portions of a tidal cycle using several harpacticoid species (Scottolana canadensis, Microarthridion littorale, Paronychocamptus huntsmani). Highest grazing rates for S. canadensis occurred just …

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The Production, Culture And Cryopreservation Of Bovine Demi-Embryos., Rickey Wayne Rorie Jan 1987

The Production, Culture And Cryopreservation Of Bovine Demi-Embryos., Rickey Wayne Rorie

LSU Historical Dissertations and Theses

The objective of experiment (Exp) I was to develop and evaluate a simplified method for producing bovine demi-embryos (DE). Treatment (Trt) A and B were the bisection zona pellucida intact (ZI) and free (ZF) embryos, respectively, using a microscope slide micromanipulator. In Trt C and D, ZI and ZF embryos, respectively, were bisected with a hand-held razor blade method. More DE were produced by the razor blade method (Trt C and D) than by the microscope slide micromanipulator method (Trt A and B). More DE were produced from ZF embryos (Trt B and D) than from ZI embryos (Trt A …

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Estimation Of Direct And Maternal Additive And Heterotic Genetic Effects For Preweaning Traits In Beef Cattle., Chi Lawrence Tawah Jan 1987

Estimation Of Direct And Maternal Additive And Heterotic Genetic Effects For Preweaning Traits In Beef Cattle., Chi Lawrence Tawah

LSU Historical Dissertations and Theses

Progency records from 4 generations of a rotational crossbreeding experiment were fitted to a regression equation to obtain estimates of direct and maternal additive (Ig, Mg) and heterotic (Ih, Mh) genetic effects of preweaning traits for Angus (A), Brahman (B), Charolais (C), Hereford (H) breeds and their combinations. These estimates were fitted to prediction equations to compare preweaning performance of breed groups under different mating systems. Heterosis estimates were used to compute expected heterosis for each rotational cross. The C had the largest Ig estimate for BWT (5.2 kg), ADG (.074 kg/d) and WWT (22.1 kg) while H had the …

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Studies On The Protein Changes In Skeletal Muscles Of Gulf Coast Finfish Species Associated With Frozen Storage, Formaldehyde Addition And Freeze-Thawing Cycles., Myrna O. Nisperos-Carriedo Jan 1987

Studies On The Protein Changes In Skeletal Muscles Of Gulf Coast Finfish Species Associated With Frozen Storage, Formaldehyde Addition And Freeze-Thawing Cycles., Myrna O. Nisperos-Carriedo

LSU Historical Dissertations and Theses

The effects of frozen storage, formaldehyde addition and freeze-thawing cycles were determined using three finfish species from the Gulf of Mexico, spotted seatrout (Cynoscion nebulosus), black drum (Pogonias cromis) and mullet (Mugil cephalus). Frozen storage of spotted seatrout fillets at $-20\sp\circ$C for 6 weeks led to reductions in pH, water-binding capacity and solubility of salt-extractable proteins. SDS-Polyacrylamide gel electrophoretic examination of the salt-extractable proteins showed that as time of storage increased, aggregation of high-molecular weight components occurred. The addition of 300 ppm formaldehyde prior to frozen storage did not produce significant changes. However, muscles containing 500 ppm formaldehyde showed decreases …

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Development Of Wash And Cook-Proof Methods For Rice Enrichment., Esmond Winston Joseph Jan 1987

Development Of Wash And Cook-Proof Methods For Rice Enrichment., Esmond Winston Joseph

LSU Historical Dissertations and Theses

Rice grains were simultaneously enriched with vitamin (thiamine, riboflavin, niacin and pyridoxine) mixes and cross-linked under acidic and alkali conditions using acetaldehyde and epichlorohydrin, respectively. Results indicated that acidic cross-linked rices had higher vitamin contents than corresponding alkali cross-linked rices. Acidic rices were also shown to be more successful in allowing the vitamin mixes to penetrate the surface of rice grains and to subsequently interact with and become an integral part of rice starch matrix. These acidic enriched rices had higher individual vitamin values of greater than 100% at the 3 gram level than both the control (untreated rice grains) …

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Malaysian Prawn (Macrobrachium Rosenbergii) Production Studies In Polyculture Schemes With Channel Catfish (Ictalurus Punctatus)., Mark Steven Lamon Jan 1987

Malaysian Prawn (Macrobrachium Rosenbergii) Production Studies In Polyculture Schemes With Channel Catfish (Ictalurus Punctatus)., Mark Steven Lamon

LSU Historical Dissertations and Theses

Three Malaysian prawn (Macrobrachium rosenbergii)/channel catfish (Ictalurus punctatus) polyculture studies were conducted from May 1984 through October 1986. In the first study prawn stocking size and density on catfish and prawn production were examined. In 1984 catfish, x = 24 g, were stocked at 9,884/ha. Prawns, x = 0.04 g, were stocked at 4,942, 9,884 and 14,826/ha. After 144 days catfish average weights, survival and yields were $<$340 g, $<$78% and $<$2,000 kg/ha, respectively. Prawn weight, survival and yields ranged from 34-54 g, 47-61% and 165-344 kg/ha, respectively. In 1985 catfish, x = 33 g, were stocked at 7,410/ha and prawns, x = 0.15 and 0.70 g, were stocked at 1984 densities. After 137 days catfish average weight, survival and yields were 427 g, 86% and 2,726 kg/ha, respectively. Prawn weight, survival and yields ranged from 48-73 g, 41-88% and 110-471 kg/ha, respectively. Positive economic net returns were achieved with 0.15 g prawns stocked at 14,826/ha and 0.70 g prawns stocked at 9,884 or 14,826/ha. In a second study prawn bottom location preference and movement were determined in ponds. Males were more frequently observed in the deep ends of ponds and near the ponds' perimeters, and females were observed more frequently in the shallow ends and in the middles of ponds. Prawn movement did not differ between day and night, averaging 1.1 m/hr. Two-funnel crawfish traps and box traps with slit entrances, 12 and 24 hr set times, and white light and commercial crawfish bait attractants were evaluated for capturing prawns. Traps were not effective at capturing prawns regardless of set time or attractant. In the third study catfish and prawn mean lengths and weights from cast-netted and seined samples were compared to a complete population census taken after 48, 92 and 139 days of growth. Ponds were stocked with catfish at 7,410/ha and prawns at 1984 study levels. Cast-netted samples under-estimated and seined samples over-estimated catfish size. Cast-netted and seined sample prawn means did not differ from each other or population parameters. Catfish and prawn size variation increased over time. Catfish and prawn survival decreased during the first 48 days and then remained constant throughout the rest of the grow-out period.

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Characteristics Of Rumen Fluid And Particulate Microorganisms And The Effect Of Particulate Microorganisms On In Situ Forage Digestibility., John Adeoye Olubobokun Jan 1987

Characteristics Of Rumen Fluid And Particulate Microorganisms And The Effect Of Particulate Microorganisms On In Situ Forage Digestibility., John Adeoye Olubobokun

LSU Historical Dissertations and Theses

The effect of diet and time after feeding on microbial crude protein (CP) and dry matter (DM) associated with undigested rumen particles was investigated using diaminopimelic acid (DAPA) as a microbial marker. In a subsequent experiment, in situ CP and DM digestibilities were corrected for microbial contamination of non-masticated and masticated (M) forages. Particle-associated (PA) microorganisms had a higher (P $<$.01) concentration of organic matter (OM) than fluid microorganisms 2 and 23 h after feeding. Bacterial fraction had a higher (P $<$.01) concentration of CP than protozoal fraction. However, the quantity of OM, CP and DAPA per ml of strained rumen fluid equivalent were higher (P $<$.01) in the protozoal than in respective bacterial fractions. In experiment two, CP and DAPA concentrations (%) and quantity (mg/ml SRFE) of OM, CP and DAPA were constant over time (P $>$.10) in fluid, loosely-associated (LA) and firmly-associated (FA) populations. Mean CP and DAPA concentrations were in the order fluid $>$ LA $>$ FA and fluid = FA $$ fluid (P =.07). Over 50% of the PA population …

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Rice Stink Bug, Oebalus Pugnax (F.), On Rice: Evaluation For Plant Resistance, Interaction Of Field Fungi With Feeding Damage, And Evaluation Of Insecticides For Control., Marieanne Eva Hollay Jan 1987

Rice Stink Bug, Oebalus Pugnax (F.), On Rice: Evaluation For Plant Resistance, Interaction Of Field Fungi With Feeding Damage, And Evaluation Of Insecticides For Control., Marieanne Eva Hollay

LSU Historical Dissertations and Theses

Feeding punctures of the rice stink bug (RSB), Oebalus pugnax (F.), provide fungi entry sites into rice, Oryza sativa (L.), grains and kernels (hulled grains). Feeding sheaths also serve as a source of nutrients for fungi. Grain spotting fungi did not affect the percentage of spotted kernels (pecky rice) and significantly reduced full grain weight only at low infestation rates of one and two RSB per panicle. Panicles had been treated with a single application of propriconazol (1000 ppm) soon after flowering and later infested in the early milk stage with RSB adult pairs for 9 days. Propriconazol was not …

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Cooking Temperature And Antioxidants As Processing Variables Affecting The Flavor And Textural Stability Of Restructured Beef Roasts., Genaro Cortes Arganosa Jan 1987

Cooking Temperature And Antioxidants As Processing Variables Affecting The Flavor And Textural Stability Of Restructured Beef Roasts., Genaro Cortes Arganosa

LSU Historical Dissertations and Theses

The effects of cooking temperature, refrigerated storage, and the presence of sodium tripolyphosphate (STP) and soy protein isolate (SPI) on the development of warmed-over flavor (WOF) in restructured beef roasts were studied. In Phase 1, restructured beef roasts were cooked in a water bath at temperatures of 70, 85 and 100$\sp\circ$C. In Phase 2, four types of roasts containing all combinations of STP and SPI were cooked in a water bath at 70 and 100$\sp\circ$C. The cooked roasts in both phases were then stored at 4$\sp\circ$C for 0 and 3 days. Higher cooking temperatures and longer storage periods tended to …

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Evaluation Of Processing Techniques For Sweet Potato Chips., Napasri Ausavanodom Vaisayanunt Jan 1987

Evaluation Of Processing Techniques For Sweet Potato Chips., Napasri Ausavanodom Vaisayanunt

LSU Historical Dissertations and Theses

Roots of Jewel sweet potato cultivar were cured at 32$\sp\circ$C, 80-90% RH for 10 days and stored at 13-16$\sp\circ$C with the same RH. Subjective and objective analyses were performed to determine optimum condition for sweet potato chip development. Frying temperatures of 143, 149, 155, and 160$\sp\circ$C; slice thickness of 1.0, 1.5, 2.0, and 2.5 mm; and four oil types, corn, cottonseed, peanut, and soybean, were studied. Sweet potato roots of the Centennial cultivar were subjected to pre- and post-frying treatments for improving color and reducing oil content of the chips after frying. Roots were cured and stored at the 32$\sp\circ$C …

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Conformational Studies Of Carnitine And Acetylcarnitine: Design And Synthesis Of Active-Site Probes Of Carnitine Acetyltransferase., William Jay Colucci Jan 1987

Conformational Studies Of Carnitine And Acetylcarnitine: Design And Synthesis Of Active-Site Probes Of Carnitine Acetyltransferase., William Jay Colucci

LSU Historical Dissertations and Theses

The conformations of carnitine (Cn) and acetylcarnitine (AcCn) have been investigated through a combination of methods. The solid-state structures of their zwitter-ionic forms have been determined by single-crystal X-ray analyses. The crystal structures reveal different backbone conformations for the two molecules. Carnitine exists in an extended conformation (a,g $\sp-$ conformations for the C1-C2-C3-C4 and N1-C4-C3-O3 torsion angles, respectively), while AcCn exhibits a folded conformation ($g\sp-,g\sp-$). The solution conformations of Cn and AcCn have been investigated by high resolution $\sp1$H NMR coupling data. A simple equation has been developed for the prediction of torsion angles from $\sp3 J$ (HCCH) coupling constants. …

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Consumption, Utilization, Biology, And Economic Injury Levels Of Fall Armyworm, Spodoptera Frugiperda (J. E. Smith), On Selected Bermudagrasses., Tasanee Jamjanya Jan 1987

Consumption, Utilization, Biology, And Economic Injury Levels Of Fall Armyworm, Spodoptera Frugiperda (J. E. Smith), On Selected Bermudagrasses., Tasanee Jamjanya

LSU Historical Dissertations and Theses

The effects of nine bermudagrass, Cynodon dactylon (L.) Pers., varieties and strains on the development, survivorship, consumption and utilization, preference, and host suitability of the fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith) were determined. The bermudagrasses tested were 'Coastal', 'Tifton 44', 'Tifton 78', 'Tifton 292', 'Grazer', #1 R12P5, 'OSU 71 X 6-7','OSU 74 X 11-2', and 'OSU 74 X 12-1'. 'Tifton 292' was the most preferred grass by neonate larvae, while 'OSU 74 X 11-2' was the least preferred grass. 'Tifton 78' was the most susceptible host, while 'OSU 71 X 6-7' was the least suitable host to FAW …

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A Seasonal And Ontogenetic Examination Of The Reproductive Biology Of Pseudoplusia Includens (Walker)., Linda Jean Mason Jan 1987

A Seasonal And Ontogenetic Examination Of The Reproductive Biology Of Pseudoplusia Includens (Walker)., Linda Jean Mason

LSU Historical Dissertations and Theses

Laboratory observations on the mating behavior of soybean loopers, Pseudoplusia includens (Walker), indicated a calling pattern that was highly variable both within individual females over time and among individuals. However, some trends were apparent. The onset of calling showed temporal advancement over the first three nights of calling after adult emergence; the duration of calling showed a temporal advancement during the first six nights, while the termination of calling receded over the same period then reversed its trend. The majority of females initiated calling three nights following emergence while maximum percent calling was observed around five hours after the onset …

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Application Of Crawfish Chitosan As A Coagulant In Recovery Of Organic Compounds From Seafood Processing Wastes., Hong Kyoon No Jan 1987

Application Of Crawfish Chitosan As A Coagulant In Recovery Of Organic Compounds From Seafood Processing Wastes., Hong Kyoon No

LSU Historical Dissertations and Theses

Millions of pounds of readily usable and renewable byproduct are discarded yearly from the rapidly expanding Louisiana crawfish processing industry. This investigation involved utilization of crawfish waste shell to produce the biopolymers chitin and chitosan, and to utilize chitosan as a coagulant and in ligand-exchange column technology for recovery of organic compounds from seafood processing discharge stickwater. Crawfish shell was found to be an excellent source of chitin (23.49% on a dry basis) and applicable physicochemical procedures for isolation of chitin from crawfish shell and its conversion to chitosan were developed. Particular attention was given to characterization of the physicochemical …

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