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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 …

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 …

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 …

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 …

Women, Environment And Development: Sub-Saharan Africa And Latin America, Evaline Tiondi

USF Tampa Graduate Theses and Dissertations

Issues related to women, environment and development constitute a major global concern today. Women's roles as agents of change in the environment has increasingly become the focus of both research and policy concerns. Environmental resource management is directly linked to development, and this makes it crucial to examine the activities of women more closely. Women's role in the management of natural resources assumes a multidimensional nature. Unfortunately, the central and crucial role that women play is often both overlooked and unappreciated, rendering them invisible and greatly diminishing their contribution as both producers and active agents in sustainable development. One of …

Abstracts Of Papers Presented At The Seventy-Eight Annual Meeting, Virginia Academy Of Science, May 23-26, 2000, Radford University, Radford, Va

Virginia Journal of Science

This document is a list of the abstracts of papers presented at the seventy-eighth meeting of the Virginia Academy of Science that took place at Radford University on May 23 through the 26th, 2000.

The Risks And Benefits Of Genetically Modified Crops: A Multidisciplinary Perspective, Garry D. Peterson, Saul Cunningham, Lisa Deutsch, Jon Erickson, Allyson Quinlan, Ernesto Ráez-Luna, Robert Tinch, Max Troell, Peter Woodbury, Scot Zens

Dartmouth Scholarship

Worldwide, the area planted in genetically modified (GM) crops has increased dramatically in recent years. Between 1996 and 1999, it rose from 1.6 X 10⁶ ha to more than 35 X 10⁶ ha (James 1998, May 1999). This rapid increase has provoked an explosion of concern, particularly in Europe, over the health and environmental impacts of these crops. Despite claims of safety and warnings against popular panic, public concern over GM crops has resulted in changes in their marketing, labeling, planting, and trade. These changes have fueled an increasingly heated debate among environmental advocates, critics of industrial agriculture, …

Ryegrasses In Alaska: Grazing Preference, Forage Yields, Digestibility, And Other Comparisons Among Four Types Of Ryegrass, And Responses Of Different Types And Cultivars To Various Management Options, Leslie J. Klebesadel

Bulletin

No abstract provided.

Biotechnology, Food, And Agriculture Disputes Or Food Safety And International Trade, Shirley A. Coffield

Canada-United States Law Journal

biotechnology, agriculture, and food safety--Canada, biotechnology, agriculture, and food safety--United States

Biotechnology, Food, And Agriculture Disputes Or Food Safety And International Trade, Serge Frechette

Canada-United States Law Journal

biotechnology, agriculture, and food safety--Canada, biotechnology, agriculture, and food safety--United States

American Alligator Nesting Ecology In Impounded Marsh Habitat, Louisiana., Steven Richard Reagan

LSU Historical Dissertations and Theses

The goal was to monitor a large number of female alligators over a 3-year period to obtain information on alligator nesting ecology. This dissertation, although designed to estimate annual nesting rates, provides additional meaningful information on methods of capture, tag retention rates, nest spacing patterns, segregation of size classes, nest site fidelity, the relationship between attendance and nest success, the effects of fire ants on alligator nest success, the relationship between hatchling alligators and their mother, and hatchling dispersal. Passive integrated transponder (PIT), monel web, and cranial mounted reflector tags were evaluated for marking and identifying alligators. Use of harmonic …

The Effects Of Dietary Fatty Acids And Non -Steroidal Anti -Inflammatory Drugs On Cyclooxygenase-2 Expression., Kyung-Hee Sohn

LSU Historical Dissertations and Theses

Dietary n-3 fatty acids and non-steroidal anti-inflammatory drugs (NSAIDs) were shown to have cancer preventive and tumor regressive effects. Fatty acids and NSAIDs are substrate and inhibitors, respectively, of cyclooxygenase-2 (COX-2), which is a key enzyme in the conversion of arachidonic acids to prostaglandins. Thus, the modulating effects of different types of dietary fatty acids and NSAIDs on the expression of COX-2 are studied here. Results show that both n-3 and n-6 polyunsaturated fatty acids (PUFAs) inhibit Lipopolysaccharide (LPS)-induced COX-2 expression and NF-kappaB activation in macrophages. Results from in vitro cell proliferation study indicate that growth of colon tumor cells …

Boron -Uptake Mechanisms And Boron Nutrition Of Rice., Xiaohe Yu

LSU Historical Dissertations and Theses

There are very few studies on B deficiency in rice (Oryza sativa L.). Reported critical values of B deficiency in rice are contradictory and mechanisms of B uptake by plant are not understood. Objectives of this study were to determine B effects on rice grown in hydroponics and soil; to determine critical values of B deficiency in rice tissues, hydroponic solution and soil; and to explore B-uptake mechanisms in both monocots (rice) and dicots (soybean (Glycine max L.)). Rice was grown to maturity in an acid Caddo silt loam at 0 and 1 kg B ha--1 in a greenhouse study, …

Biological And Molecular Properties Of Sweet Potato Leaf Curl Virus., Pongtharin Lotrakul

LSU Historical Dissertations and Theses

In 1994, a sweet potato sample showing leaf curl symptoms was collected from the field in Louisiana. When graft-inoculated, Ipomoea setosa reacted with mild upward leaf curling while I. aquatica reacted with a bright yellow mottle. The putative virus was transmitted by the sweet potato whitefly, Bemisia tabaci biotype B, and it was designated the United States isolate of Sweet potato leaf curl virus (SPLCV-US). Four independent Southern blot hybridizations using the DNA-A of different begomoviruses as probes confirmed the presence of begomovirus-like DNA in the infected plants. Fibrillar inclusions and granular aggregates of geminivirus-like particles were observed in the …

Source, Production And Export Of Dissolved Organic Carbon And Nitrogen, Jacqueline A. Aitkenhead-Peterson

Doctoral Dissertations

The purpose of this research was to quantify the major sources of dissolved organic carbon (DOC) and nitrogen (DON) in forest soils and ascertain mechanisms for their production and export to surface waters. To quantify the source of DOC we made use of the on-going litter manipulation study (DIRT) at Harvard Forest, Massachusetts. The organic horizon supplies 74% of DOC to bulk soil solution, 12% is supplied by leaf litter, and 13% from root exudate and decay. In plots with no inputs, DON concentrations were 9% higher than the control plots. When either roots or litter were excluded, DON concentrations …

Impacts Of Wildlife Viewing: A Case Study Of Dixville Notch Wildlife Viewing Area, Judith Kay Anderson Silverberg

Doctoral Dissertations

Major objectives of this study were to examine the motivations, knowledge level and attitudes of wildlife viewers as well as the response of moose to observation and other human caused stimuli at a designated wildlife viewing site. Moose and other wildlife are attracted to areas where road salt runoffs and pools in low areas around culverts and ditches creating wildlife viewing opportunities.

This study examined whether moose behaviors such as visitation time and rate of use of the salt lick changed from preconstruction (1996) of a wildlife blind to wildlife viewing establishment (1999). Trailmaster monitors strategically located on trails entering …

Ignoring Variation: Are We Missing Opportunities?, Behave

All Current Publications

This publication discusses the fact that each individual person and animal is so unique from one another and the opportunity to study and learn about the differences rather than the similarities and averages is often passed up.

Dietary Betaine For Swine And Poultry., John O'Neal Matthews

LSU Historical Dissertations and Theses

The purpose of this research was to determine the effects of dietary betaine in swine and poultry under conditions that may benefit the swine and poultry industries. In finishing pigs, one experiment was conducted to determine the effect of dietary betaine level on growth, carcass traits, and pork quality. Another experiment evaluated the interactive effects of betaine, pen spacing, and slaughter handling method. In weanling pigs, five experiments were conducted to determine the interactive effects of betaine and Zn, or to determine if betaine can replace a portion of the methionine requirement. In poultry, two experiments were conducted to determine …

Effects Of Dietary Phytase Supplementation On Growth, Nutrient Utilization, And Phytate Degradation In Channel Catfish, Ictalurus Punctatus., Weibing Yan

LSU Historical Dissertations and Theses

Phytase supplementation increases the availability of phosphorus in fish diets, and dietary protein utilization might be increased as well by lower phytate concentrations in phytase supplemented diets. Experiments were conducted to determine if weight gain; protein utilization; mineral retention; apparent dry matter, protein and mineral digestibility; and phytate degradation in the stomach of channel catfish fed an all-plant-protein diet could be improved by phytase supplementation. Seven diets were tested: a nutrient complete diet (TC) containing 5% fish meal and six all-plant-protein diets (T1--T6) that contained minimal levels of available phosphorus (0.16%; total P = 0.57%) and zinc (53.37 ppm), but …

A Cross-Sectional Study Of Prevalence And Risk Factors For Major Goat Diseases In Eastern And Western Uganda: Results And Exploration Of Biases., Edmond Kato Kabagambe

LSU Historical Dissertations and Theses

In 1998 a cross-sectional study on goat health and management was conducted in eastern and western Uganda. This study involved 1518 goats which were distributed in 145 herds in 5 districts, namely Kumi, Masaka, Mbarara, Soroti and Ssembabule. Cluster sampling was used to select farms across the two regions. A questionnaire on goat health, management and constraints to production was administered to 145 goat owners. Blood and nasal swabs were collected from a random sample of goats. For each goat a physical examination was performed to detect presence of clinical conditions. Serological assays for contagious caprine pleuropneumonia (CCPP), peste des …

The Relationship Of Biomass Allocation And Nutrient Dynamics In Loblolly And Slash Pine Forests., Christopher Ashley Dicus

LSU Historical Dissertations and Theses

Aboveground biomass allocation and its effect on various aspects of N and P dynamics were investigated in loblolly pine (Pinus taeda L.) and slash pine (Pinus elliottii Engelm.) stands planted at different spacings. Further, the relationship of nutrient demand and root production was investigated to validate the functional balance hypothesis in forest stands. N mineralization was greater in loblolly pine stands than slash pine, corresponding with greater needle litter N concentration. Both N and P mineralization increased in loblolly pine stands with increasing stand density, the result of greater nutrient input through increased litterfall. There were no species differences in …

The Effect Of Storage On Consumer Preference, Sugar Content, And Starch Content Of Spiced Low-Fat Sweet Potato Flavored Yogurt., Mohammad Abdulrahman Al-Fayez

LSU Historical Dissertations and Theses

The primary purpose of this study was to determine if addition of pumpkin pie spice to sweet potato puree would enhance consumer acceptance of sweet potato flavored yogurt. In Phase I, the effect of fat percentage, spice percentage, and addition of sweet potato pre-fermentation and post-fermentation on consumer acceptance was examined to determine the optimum treatment preferred by consumers and the effect of each treatment variable on the fermentation process. Phase II focused on the effect of storage periods of 7, 14, and 21 days on the organoleptic qualities and chemical composition of sweet potato. Analyses showed that the percentage …

The Effect Of Phytase On Nutrient Availability In Diets For Swine And Poultry., Sara Leann Johnston

LSU Historical Dissertations and Theses

A series of experiments was conducted to determine the effect of increasing phytase coefficient of variation (CV) in chick diets, and to determine the effect of phytase addition on nutrient availability in diets for swine and poultry. The first experiment (EXP) simulated varying mix uniformity of phytase by alternately providing two diets with two different concentrations of microbial phytase (FTU). Increasing phytase CV had little effect on growth performance, whereas bone ash and breaking strength and Ca and P retention and excretion decreased only at the most extreme CV. These data suggest that a phytase CV of between 34 and …

Effects Of A Low -Protein Diet Supplemented With Coated And Uncoated Methionine On Methionine Metabolism In The Tilapia Oreochromis Niloticus., Manuel Alberto Segovia-Quintero

LSU Historical Dissertations and Theses

Crude protein is the most expensive macronutrient, the use of plant proteins and crystalline amino acid supplementation is the next logical step to increase nutritional value of plant-based diets. The goal of this experiment was to determine the effect of coated and uncoated crystalline methionine on growth, body composition, and methionine uptake in Nile tilapia Oreochromis niloticus fed methionine supplements. Two experiments were designed for this purpose: one to study the effect of supplementation on weight gain and body composition, and a second to determine the effect of coating on absorption efficiency and utilization of crystalline methionine. Five isonitrogenous (26% …

Structure, Expression And Promoter Activity Of Ubiquitin Genes From Rice (Oryza Sativa L.)., Jianlin Wang

LSU Historical Dissertations and Theses

Successful transgenic plant production is largely dependent on the use of suitable promoters. In this study, we described isolation of rice ubiquitin genes, and demonstrated the potential utility of the rice ubiquitin promoters in plant transformation systems. Two polyubiquitin genes (RUBQ1 and RUBQ2) and two ubiquitin extension/fusion genes (RUBQ3 and RUBQ4) have been isolated from a rice genomic BAC library. DNA sequence data revealed that both RUBQ1 and RUBQ2 contained an open reading frame encoding a hexameric precursor ubiquitin and an intron immediate upstream of the initiation codon. The two ubiquitin fusion/extension genes RUBQ3 and RUBQ4 contained one repeat of …

Comparative Efficacy And Quality Characterizatin Of Mayhaw (Crataegus Opaca) Juice Extraction., Alfred Francois Trappey Ii

LSU Historical Dissertations and Theses

The comparative efficacy and quality characterization of juice by six extraction methods utilizing either frozen or fresh 'Texas Star' mayhaw (Crataegus opaca Hook. and Arn.) fruit obtained from the 1998 and 1999 crop season were conducted according to temperature (cold-press or hot-press extraction) and fruit pulp pretreatment (whole or pulverized fruit with or without pectolytic enzyme). Extraction methods were steam extraction using whole fruit without added pulp juice (SE); steam extraction using whole fruit with added pulp juice (SEP); cold-press extraction using whole fruit (CPE); cold-press extraction using finely macerated fruit pulp (CPEG); hot-press extraction using finely macerated fruit pulp …

Modified Atmosphere Packaging Of Fresh -Cut Sweetpotatoes., Elif Erturk

LSU Historical Dissertations and Theses

Fresh-cut sweetpotato products have potential to create new value-added market opportunities. To determine optimum film packaging and storage temperature, fresh-cut sweetpotato slices were packaged with semipermeable polyolefin films, having different gas transmission characteristics and kept at 2 or 8°C for 14 days. The films chosen, in order of increasing permeability, were Cryovac PD900, PD961, and PD941. Among the films, only PD941 film bags maintained an aerobic atmosphere during the 14 days at both temperatures. However, the high weight loss in slices with PD941 film bags will limit the use of these film bags as modified atmosphere packaging (MAP) material. PD961 …

Clean Water Act Compliance Audit Program For Pork Producers: How Was Such An Agreement Between Epa And The National Pork Producers Reached , Anita K. Chancey

Missouri Law Review

A recent agreement between the Environmental Protection Agency and the National Pork Producers Council puts into place a voluntary inspection program that may lead to reduced fines for pork producers who report and correct Clean Water Act violations This agreement represents the first of its kind between an agriculture group and the Environmental Protection Agency.2 This Article explores the background that led to the agreement. The evolution from small family farming to large corporate livestock production, along with the environmental concerns such evolution has produced, is traced. The next section lays out some of the federal and state statutory and …

Perceptions Of Students And Teachers Regarding Agriculture In Leflore County, Mississippi, Ronald L. Howard

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to assess the perceptions of public high school teachers and students in Leflore County, Mississippi regarding agriculture and provide baseline data regarding the perception of high school students and teachers residing in an agriculturally dependent county with no agricultural education program. A population of 240 high school teachers and students was surveyed for their perceptions regarding agriculture. All three public high schools in Leflore County were represented in this study. Over 65% of the sample resided in the city, while only 3% live on a farm. The major finding of this study was that …

Abstracts Of Papers, 77th Annual Meeting Of The Virginia Academy Of Science, May 26-28, 1999, Old Dominion University, Norfolk, Virginia

Virginia Journal of Science

This document is a list of abstracts presented at the 77th annual meeting of the Virginia Academy of Science, between May 26 and May 28th, 1999, at Old Dominion University.