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Physicochemical, Functional And Spectroscopic Analysis Of Crawfish Chitin And Chitosan As Affected By Process Modification., Sandeep Kumar Rout
Physicochemical, Functional And Spectroscopic Analysis Of Crawfish Chitin And Chitosan As Affected By Process Modification., Sandeep Kumar Rout
LSU Historical Dissertations and Theses
Traditional isolation of chitin from crawfish shells involves three sequential steps: demineralization (DM, removing calcium carbonate/phosphate), deproteinization (DP), and decolorization (DC, removing mainly astaxanthin). The first two steps can be reversed (i.e., DMP or DPM). Chitin is converted to chitosan by deacetylation (DA). Isolation steps may be shortened, depending on intended applications of chitosan. The first study investigated effects of (1) reversing sequence and (2) eliminating DP and DC steps on physicochemical and functional properties of chitosan and conversion efficiency of chitin. Twelve different processes: DM, DP, DPM, DMP, DPMC, DMPC, DMA, DMCA, DPMA, DMPA, DPMCA, DMPCA were investigated. DA …
Crop Response And Weed Control With Glufosinate In Rice., David Yves Lanclos
Crop Response And Weed Control With Glufosinate In Rice., David Yves Lanclos
LSU Historical Dissertations and Theses
Studies were conducted to evaluate crop tolerance and yield of glufosinate-resistant rice lines treated with glufosinate throughout the season. In addition, studies were conducted on harvested seed treated with glufosinate at various growth stages to evaluate seed weights, germination, and seedling vigor. Weed control with glufosinate alone and in combination with other herbicides was evaluated. Red rice control with different glufosinate rates and timings under 5, 10, and 20 cm permanent flood depths was also evaluated. In the tolerance study, CPRS PB-13 injury was less than 10% for all timings and no differences in yield were detected when compared with …
Obstacles In Recruiting African Americans For Clinical Trials., Betty Monroe Kennedy
Obstacles In Recruiting African Americans For Clinical Trials., Betty Monroe Kennedy
LSU Historical Dissertations and Theses
Previous abusive clinical trials have caused several obstacles in recruiting African Americans for clinical trials today. The memory of the Tuskegee Syphilis Study alone remains a hard pill to swallow and is a constant hindrance to recruiting potential African Americans specifically males, for clinical trials. The basic trust that African Americans have for physician researchers, U.S. government doctors, U.S. government-sponsored research, and biomedical research in general has been seriously, although not irrevocably, breached. The purpose of this study was to gain an understanding of the knowledge, attitudes, and beliefs African Americans have that support decisions to either participate or not …
Treatment Outcome Of Childhood Obesity: The Effect Of Children's Psychological Distress And Problematic Behavior., Tana Louise Hope
Treatment Outcome Of Childhood Obesity: The Effect Of Children's Psychological Distress And Problematic Behavior., Tana Louise Hope
LSU Historical Dissertations and Theses
The number of children and adolescents effected by obesity has been increasing over the past 30 years. Current treatment of childhood obesity focuses primarily on increasing physical activity, modifying diet, providing nutritional education and teaching self-monitoring and stimulus control procedures. Although children have been shown to lose weight by participating in these treatment programs, the amount of weight children lose during treatment is often small, and long-term maintenance of weightloss continues to be challenging for many. Given the relatively weak outcome of childhood obesity treatment programs, research into factors that effect treatment outcome is needed. Psychological distress and problematic behavior …
Exploring Organizational Learning Of The Louisiana Cooperative Extension Service: A Qualitative Study Involving Parish Chairs Of Less Than Three Years Experience., Cathy Hirsch Hamilton
Exploring Organizational Learning Of The Louisiana Cooperative Extension Service: A Qualitative Study Involving Parish Chairs Of Less Than Three Years Experience., Cathy Hirsch Hamilton
LSU Historical Dissertations and Theses
This qualitative study was designed to facilitate the description, analysis and utilization of continual learning within the Louisiana Cooperative Extension Service (LCES). The research linked exploration of a learning culture within an organization with the reflective practice of participatory action research methodology. Learning organizations promote knowledge sharing that allows for individual learning to make the transition into collective organizational learning. In order for transformative learning to occur, individuals must reflect on their actions to make sense of an experience. Explaining and thinking about what one is doing makes tacit knowledge explicit, therefore able to be shared and used for change. …
Epidemiology Of Salmonella In The Green Iguana (Iguana Iguana)., Mark Anthony Mitchell
Epidemiology Of Salmonella In The Green Iguana (Iguana Iguana)., Mark Anthony Mitchell
LSU Historical Dissertations and Theses
The incidence of iguana-associated salmonellosis reported in humans during the 1990's is a public health concern. This research is the first attempt to describe the epidemiology of Salmonella in the green iguana. Seasonal prevalence of Salmonella in green iguanas and their environment were estimated at a commercial iguana farm in El Salvador. The prevalence of Salmonella was lower in adult iguanas (44%) than in yearlings (50%) (Odds ratio (OR): 0.77, 95% Confidence Intervals (CI): 0.6--0.96) and higher in male iguanas (50%) than females (41%) (OR: 1.5, 95% CI: 1.2--1.8). Salmonella recovery was lower in the fall (41%) sampling period than …
Analysis And Mathematical Modeling Of Autonomously Oscillating Yeast Cultures., Abdelqader M. Zamamiri
Analysis And Mathematical Modeling Of Autonomously Oscillating Yeast Cultures., Abdelqader M. Zamamiri
LSU Historical Dissertations and Theses
The conditions that precede the onset of autonomous oscillations in continuous yeast cultures were studied in three different types of experiments. It was found that the final state of the culture depends on the protocol used to start-up the reactor. Reaching the desired operating point by slow dilution rate changes gave rise to different final states, two oscillatory states and one steady state, depending on the rate of change in dilution rate. The multiplicity of stable states at a single operating point is not explained by current distributed models and points towards a segregated mechanism of these oscillations. The ability …
A Drifter Study Of Advection, Deformations, And Patch Variances With Application To Larval Transport And Dispersal In Barataria Bay, Louisiana., Terry L. Schaefer
A Drifter Study Of Advection, Deformations, And Patch Variances With Application To Larval Transport And Dispersal In Barataria Bay, Louisiana., Terry L. Schaefer
LSU Historical Dissertations and Theses
Field studies were conducted to characterize flow fields and their effect on larval transport and retention within Barataria Bay, Louisiana. Drifter tracking and passive larval sampling was conducted monthly during the spring and summer months from 1994 through 1996. Fifteen drifter tracking sessions were conducted over full tidal cycles (diurnal). Drifter positions were determined approximately every thirty minutes using a GPS receiver. A spline interpolation was used to estimate drifter positions at synchronous five-minute intervals. An analytical methodology of Okubo and coworkers was used to compute deformations; and changes in patch variances from the drifter positions. Mean tidal advection and …
The Effect Of Calcium Silicate On Rice Yield And Sheath Blight Disease., Chris Raymond Robichaux
The Effect Of Calcium Silicate On Rice Yield And Sheath Blight Disease., Chris Raymond Robichaux
LSU Historical Dissertations and Theses
Sheath blight caused by fungal pathogen Rhizoctonia solani can cause significant yield loss in rice, especially in warm, high rainfall environments. Integrated pest management (IPM) is the key to sheath blight control. This system utilizes disease resistance, pesticides, cultural practices and biological control to control multiple pests. Silicon fertilization is an additional cultural practice that can reduce sheath blight severity and increase grain yield. Studies were conducted in the greenhouse and field to determine the effect of calcium silicate on sheath blight severity, rice grain yield, and leaf silicon concentration. Results in the greenhouse study showed that sheath blight severity …
Development And Characterization Of Velocity Workspaces For The Human Knee., John Eric Fuller
Development And Characterization Of Velocity Workspaces For The Human Knee., John Eric Fuller
LSU Historical Dissertations and Theses
The knee joint is the most complex joint in the human body. A complete understanding of the physical behavior of the joint is essential for the prevention of injury and efficient treatment of infirmities of the knee. A kinematic model of the human knee including bone surfaces and four major ligaments was studied using techniques pioneered in robotic workspace analysis. The objective of this work was to develop and test methods for determining displacement and velocity workspaces for the model and investigate these workspaces. Data were collected from several sources using magnetic resonance imaging (MRI) and computed tomography (CT). Geometric …
Body Condition, Leptin, And Reproductive Characteristics In Horses., Laura Roland Gentry
Body Condition, Leptin, And Reproductive Characteristics In Horses., Laura Roland Gentry
LSU Historical Dissertations and Theses
A series of experiments was conducted to gain a better understanding of the effects of nutrition and hormonal manipulation on the reproductive processes of the horse. In Experiment 1, body condition score (BCS) and ultrasonic backfat measurements were highly correlated in mares, especially over the tailhead area. In Experiment 2, high BCS (HBCS) mares continued to ovulate during the winter anestrous period, whereas low BCS (LBCS) mares went deeply anestrous. Daily hormone concentrations were not affected by BCS, however, responses to hormonal challenges indicated cyclicity in HBCS mares and reproductive quiescence in LBCS mares. In Experiment 3, treatment of average …
Effects Of Lipids, Amino Acids, And Beta-Cyclodextrin On Gelatinization, Pasting, And Retrogradation Properties Of Rice Starch., Xiaoming Liang
Effects Of Lipids, Amino Acids, And Beta-Cyclodextrin On Gelatinization, Pasting, And Retrogradation Properties Of Rice Starch., Xiaoming Liang
LSU Historical Dissertations and Theses
The primary purpose of this study was to determine the addition of lipids, amino acids, and beta-cyclodextrin effects on commercial rice starch gelatinization, pasting, and retrogradation properties by using differential scanning calorimetry (DSC), rapid visco analysis (RVA), and x-ray diffractometry (XRD). Analyses from commercial rice starch showed that the presence of 0.6% monopalmitin (MP) increased the peak viscosity (PV), minimum viscosity (MV), and final viscosity (FV) by 38, 27, and 72 RVU respectively. The pasting temperature was also increased by 6°C, whereas the total setback (TSB) was increased by 45 RVU. Incorporation of lysophosphatidylcholine (LC) and lysophosphatidylethanolamine (LE) also showed …
Effects Of Nitric Oxide Synthase Inhibitors On Equine And Bovine Follicular Dynamics And Steroidogenesis., Carlos Roberto Fontes Pinto
Effects Of Nitric Oxide Synthase Inhibitors On Equine And Bovine Follicular Dynamics And Steroidogenesis., Carlos Roberto Fontes Pinto
LSU Historical Dissertations and Theses
Current scientific literature has shown that: (1) NO is a pro-ovulatory agent and inhibition of its production inhibits ovulation, and (2) NO has strong antisteroidogenic activity, especially on estradiol (E2) production by granulosa cells. The experiments described in this dissertation were designed to answer the following questions involving effects of NO on ovarian physiology: (1) is the inhibitory effect of nitric oxide synthase (NOS) inhibitors on ovulation irreversible (follicular atresia) or temporary (delayed ovulation)? and (2) what is the relationship between NO and hCG-induced preovulatory luteinization? Accordingly, cycling mares were subjected to treatment with NOS inhibitors (L-NAME or aminoguanidine) during …
Production, Process Design And Quality Characterization Of Catfish Visceral Oil., Subramaniam Sathivel
Production, Process Design And Quality Characterization Of Catfish Visceral Oil., Subramaniam Sathivel
LSU Historical Dissertations and Theses
Between 45--55% of viscera, head, skin, intestine and slurries are generally generated as byproducts or waste from catfish filleting process. Our preliminary study showed that the crude fat content of the whole catfish viscera was 30--35% (wet basis) and the total o-3 fatty acids of oils recovered from the whole and/or portioned viscera ranged from 4.3--20.9 mg/g (dry basis). Catfish viscera may serve as an excellent source of health-promoting oil. Yield of purified (deodorized) catfish visceral oil was 65.7% and contained considerable amounts of DHA (1.21 mg/g of oil) and omega-3 fatty acid (4.6 mg/g of oil). A rapid microwave-assisted …
Trends And Disparities In Coronary Heart Disease, Stroke, And Other Cardiovascular Diseases In The United States: Findings Of The National Conference On Cardiovascular Disease Prevention, Richard Cooper, Jeffrey Cutler, Patrice Desvigne-Nickens, Stephen P. Fortmann, Lawrence Friedman, Richard Havlik, Gary Hogelin, John Marler, Paul Mcgovern, Gregory Morosco, Lori Mosca, Thomas Pearson, Jeremiah Stamler, Daniel Stryer, Thomas Thom
Trends And Disparities In Coronary Heart Disease, Stroke, And Other Cardiovascular Diseases In The United States: Findings Of The National Conference On Cardiovascular Disease Prevention, Richard Cooper, Jeffrey Cutler, Patrice Desvigne-Nickens, Stephen P. Fortmann, Lawrence Friedman, Richard Havlik, Gary Hogelin, John Marler, Paul Mcgovern, Gregory Morosco, Lori Mosca, Thomas Pearson, Jeremiah Stamler, Daniel Stryer, Thomas Thom
Faculty Publications
A workshop was held September 27 through 29, 1999, to address issues relating to national trends in mortality and morbidity from cardiovascular diseases; the apparent slowing of declines in mortality from cardiovascular diseases; levels and trends in risk factors for cardiovascular diseases; disparities in cardiovascular diseases by race/ethnicity, socioeconomic status, and geography; trends in cardiovascular disease preventive and treatment services; and strategies for efforts to reduce cardiovascular diseases overall and to reduce disparities among subpopulations. The conference concluded that coronary heart disease mortality is still declining in the United States as a whole, although perhaps at a slower rate than …
Consumer And Handler Reactions To Potential Country-Of-Origin Labeling Of Fresh Or Frozen Beef (Bulletin #878), Alvin Schupp, Jeffrey Gillespie
Consumer And Handler Reactions To Potential Country-Of-Origin Labeling Of Fresh Or Frozen Beef (Bulletin #878), Alvin Schupp, Jeffrey Gillespie
LSU AgCenter Bulletins
Imported fresh or frozen beef, along with other food products, is identified by country-of-origin as it enters the U.S. in bulk containers. This bulletin includes information and primary objectives on country-of-origin of fresh or frozen beef.
Louisiana Agriculture Fall, 2000, Lsu Agcenter
Louisiana Agriculture Fall, 2000, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
Re: 'Differences In Socioeconomic Status And Survival Among White And Black Men With Prostate Cancer' [1] (Multiple Letters), Jay S. Kaufman, Robert Millikan, Charles Poole, Paul Godley, Richard S. Cooper, Vincent Freeman
Re: 'Differences In Socioeconomic Status And Survival Among White And Black Men With Prostate Cancer' [1] (Multiple Letters), Jay S. Kaufman, Robert Millikan, Charles Poole, Paul Godley, Richard S. Cooper, Vincent Freeman
Faculty Publications
No abstract provided.
Louisiana Agriculture Summer, 2000, Lsu Agcenter
Louisiana Agriculture Summer, 2000, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
Louisiana Agriculture Spring, 2000, Lsu Agcenter
Louisiana Agriculture Spring, 2000, Lsu Agcenter
Louisiana Agriculture
No abstract provided.
Alcohol Intake And Mortality: Findings From The National Health Interview Surveys (1988 And 1990), Youlian Liao, Daniel L. Mcgee, Guichan Cao, Richard S. Cooper
Alcohol Intake And Mortality: Findings From The National Health Interview Surveys (1988 And 1990), Youlian Liao, Daniel L. Mcgee, Guichan Cao, Richard S. Cooper
Faculty Publications
The authors used prospective data from two supplemental studies of the National Health Interview Survey, the 1988 Alcohol Supplement and the 1990 Health Promotion and Disease Prevention Supplement, to examine the relation between alcohol intake and mortality. Their study included 17,821 men and 25,874 women aged 40 years or older at baseline; during an average of 6 years of follow-up, 5,540 deaths occurred. The alcohol-mortality relation was U-shaped for men and J-shaped for women. On the basis of categorical analyses adjusted for age, race, smoking, and baseline diseases, men who drank 2 drinks per day had a significantly lower risk …
Effects Of Prolonged Soil Drought On Ch4 Oxidation In A Temperate Spruce Forest, W. Borken, R. Brumme, Y. J. Xu
Effects Of Prolonged Soil Drought On Ch4 Oxidation In A Temperate Spruce Forest, W. Borken, R. Brumme, Y. J. Xu
Faculty Publications
Our objective was to determine potential impacts of changes in rainfall amount and distribution on soil CH4 oxidation in a temperate forest ecosystem. We constructed a roof below the canopy of a 65-year-old Norway spruce forest (Picea abies (L.) Karst.) and simulated two climate change scenarios: (1) an extensively prolonged summer drought of 172 days followed by a rewetting period of 19 days in 1993 and (2) a less intensive summer drought of 108 days followed by a rewetting period of 33 days in 1994. CH4 oxidation, soil matric potential, and soil temperature were measured hourly to daily over a …
Global Change And Biodiversity Linkages Across The Sediment-Water Interface, C. R. Smith, M. C. Austen, G. Boucher, C. Heip, P. A. Hutchings, G. M. King, I. Koike, P. J.D. Lambshead, P. Snelgrove
Global Change And Biodiversity Linkages Across The Sediment-Water Interface, C. R. Smith, M. C. Austen, G. Boucher, C. Heip, P. A. Hutchings, G. M. King, I. Koike, P. J.D. Lambshead, P. Snelgrove
Faculty Publications
No abstract provided.
Influence Of Mechanical Processing On Utilization Of Corn Silage By Lactating Dairy Cows, T. R. Dhiman, M. A. Bal, Z. Wu, V. R. Moreira, R. D. Shaver, L. D. Satter, K. J. Shinners, R. P. Walgenbach
Influence Of Mechanical Processing On Utilization Of Corn Silage By Lactating Dairy Cows, T. R. Dhiman, M. A. Bal, Z. Wu, V. R. Moreira, R. D. Shaver, L. D. Satter, K. J. Shinners, R. P. Walgenbach
Faculty Publications
We conducted three experiments to determine the influence of mechanical processing on corn silage utilization by lactating dairy cows. Total mixed rations contained either unprocessed or processed corn silage harvested between 1/4 and 3/4 milk line. In trial 1, 12 multiparous Holstein cows were used in a replicated double switchback design with 21-d periods. Intake of dry matter (DM) was increased 1.2 kg/d by processing, but milk yield was unaffected. Processing did not affect apparent total-tract DM digestibility, but processing tended to lower starch and corn excretion in feces and reduced concentration of sieved corn kernel particles in feces. In …
A Multiplex Approach To Molecular Detection Of Brucella Abortus And/Or Mycobacterium Boris Infection In Cattle, Srinand Sreevatsan, Jack B. Bookout, Fidel Ringpis, Veera S. Perumaalla, Thomas A. Ficht, L. Garry Adams, Sue D. Hagius, Philip H. Elzer, Betsy J. Bricker, Girish K. Kumar, M. Rajasekhar, Srikrishna Isloor, Raj R. Barathur
A Multiplex Approach To Molecular Detection Of Brucella Abortus And/Or Mycobacterium Boris Infection In Cattle, Srinand Sreevatsan, Jack B. Bookout, Fidel Ringpis, Veera S. Perumaalla, Thomas A. Ficht, L. Garry Adams, Sue D. Hagius, Philip H. Elzer, Betsy J. Bricker, Girish K. Kumar, M. Rajasekhar, Srikrishna Isloor, Raj R. Barathur
Faculty Publications
A multiplex amplification and detection platform for the diagnosis of Mycobacterium bovis and Brucella abortus infection simultaneously in bovine milk and nasal secretions was developed. This system (designated the bovine pathogen detection assay [BPDA]-PCR) consists of duplex amplification of species-specific targets (a region of the BCSP31K gene of B. abortus and a repeat-sequence region in the hsp65 gene of M. bovis, respectively). This is followed by a solid-phase probe capture hybridization of amplicons for detection. On the basis of spiking experiments with normal milk, the analytical sensitivity of the assay was 800 CFU equivalents/ml of milk for B. abortus and …
Lipase And Lipoxygenase Activity, Functionality, And Nutrient Losses In Rice Bran During Storage (Bulletin #870), Fatemeh Malekian, Ramu M. Rao, Witoon Prinyawiwatkul, Wayne E. Marshall, Marlene Windhauser, Mohammed Ahmedna
Lipase And Lipoxygenase Activity, Functionality, And Nutrient Losses In Rice Bran During Storage (Bulletin #870), Fatemeh Malekian, Ramu M. Rao, Witoon Prinyawiwatkul, Wayne E. Marshall, Marlene Windhauser, Mohammed Ahmedna
LSU AgCenter Bulletins
This bulletin includes information on the feasibility of using microwave heat to inactivate lipase and LOX, determine the optimum storage and packaging conditions with the fewest adverse effects on functionality, and to determine changes in functionality of rice bran as a result of heat treatment.
Comparability Of Resting Energy Expenditure In Nigerians And U.S. Blacks, Amy Luke, Charles N. Rotimi, Adebowale A. Adeyemo, Ramon A. Durazo-Arvizu, T. Elaine Prewitt, Lisa Moragne-Kayser, Regina Marders, Richard S. Cooper
Comparability Of Resting Energy Expenditure In Nigerians And U.S. Blacks, Amy Luke, Charles N. Rotimi, Adebowale A. Adeyemo, Ramon A. Durazo-Arvizu, T. Elaine Prewitt, Lisa Moragne-Kayser, Regina Marders, Richard S. Cooper
Faculty Publications
Objective: To determine the influence of environmental factors on resting energy expenditure (REE) and its relationship to adiposity in two populations of West African origin, Nigerians and U.S. blacks. Research Methods and Procedures: REE and body composition were measured in a cross-sectional sample of 89 Nigerian adults (39 women and 50 men), and 181 U.S. black adults (117 women and 65 men). Both groups represent randomly selected population samples. REE was measured by indirect calorimetry after an overnight fast in both sites using the same instrument. Body composition was estimated using bioelectrical impedance analysis (BIA) in 72 Nigerians and 156 …
Effect Of Silicon Rate And Host Resistance On Blast, Scald, And Yield Of Upland Price, K. W. Seebold, L. E. Datnoff, F. J. Correa-Victoria, T. A. Kucharek, G. H. Snyder
Effect Of Silicon Rate And Host Resistance On Blast, Scald, And Yield Of Upland Price, K. W. Seebold, L. E. Datnoff, F. J. Correa-Victoria, T. A. Kucharek, G. H. Snyder
Faculty Publications
Blast-resistant, partially resistant, and susceptible cultivars of rice were planted in soil amended with Si at 0, 500, or 1,000 kg/ha at two locations in eastern Colombia to assess differential responses to leaf blast, neck blast, and leaf scald, and to examine the quantity and quality of grains harvested. Leaf and neck blast on partially resistant and susceptible cultivars were reduced by Si as the rate of Si was increased. Depending on the location, the level of severity of leaf and neck blast on partially resistant cultivars, when fertilized with Si at 500 or 1,000 kg/ha, was lowered to that …
Calla History And Culture, Jeff S. Kuehny
Carbohydrate-Related Changes In Sweetpotato Storage Roots During Development, Don R. La Bonte, David H. Picha, Hester A. Johnson
Carbohydrate-Related Changes In Sweetpotato Storage Roots During Development, Don R. La Bonte, David H. Picha, Hester A. Johnson
Faculty Publications
The quantity and pattern of carbohydrate-related changes during storage root development differed among six sweetpotato cultivars [Ipomoea batatas (L.) Poir. 'Beauregard', 'Heart-o-Gold', 'Jewel', 'Rojo Blanco', 'Travis', and 'White Star']. Measurements were taken for individual sugars, total sugars, alcohol-insoluble solids (AIS, crude starch), and dry weight (DW) at 2-week intervals from 7 to 19 weeks after transplanting (WAT) in two separate years. Sucrose was the major sugar during all stages of development, representing at least 68% of total sugars across all cultivars and dates. Pairwise comparisons showed 'Heart-o-Gold' had the highest sucrose content among the cultivars. Sucrose content increased by 56% …