Digital Commons Network^™

Reduction And Management Of Risks Associated With Aflatoxin And Fumonisin Contamination In Corn., Socrates Trujillo

LSU Historical Dissertations and Theses

Aflatoxins and fumonisins, secondary mold metabolites, occur naturally as co-contaminants in corn. Health and economic risks associated with this contamination of food and feed have been the focus of much research worldwide. Research programs resulting from the discovery of aflatoxins in the 1960's has been used to guide study programs for fumonisins. The establishment of food safety programs, including mycotoxin decontamination procedures, must be evaluated for further application. The evaluation of selected procedures which reduce the risks associated with the contamination of these mycotoxins in food utilized for human and animal consumption was the focus of this study. This study …

New Developments In Portable Fast Gas Chromatography., Elena Ursula Ehrmann

LSU Historical Dissertations and Theses

Currently commercially available portable gas chromatographs are suitable only for the analysis of volatile organic compounds, and do not include temperature programming capability. This dissertation presents the development of a novel direct at-column heater design and a pressure driven injection system that is compatible with semi-volatile analytes. The collinear and coaxial at-column heater designs incorporate heater and temperature sensing elements placed along the column. Resistive heating controls the column temperature via a feedback circuit and a software selected program. Linear temperature programming ramps up to 14$\sp\circ$C/s were obtained, with a total power consumption of less than 100 Watt. The accuracy …

Integrated Pest Management Tactics For Control Of Cabbage Looper And Diamondback Moth In Cabbage., Paul Wesley Ivey

LSU Historical Dissertations and Theses

Population density estimates, yield data, damage rating, and marketability of cabbage were used to assess the effectiveness of integrating several control tactics--an action threshold, host plant resistance, intercropping (companion planting), microbial control, and pesticide use reduction--for managing the diamondback moth (DBM), Plutella xylostella (L.), and the cabbage looper (CL), Trichoplusia ni (Hubner), in cabbage and in protecting beneficial arthropods. An action threshold of six DBM larvae per plant was inadequate for making insecticide application decisions because cabbage plots treated based on this action threshold had significantly higher densities of CL and DBM larvae, higher damage rating and yield loss, and …

Coastal Management Regarding Beach And Dune Protection: An Exploratory Analysis., Melissa Lee Gordon

LSU Historical Dissertations and Theses

The Congressional declaration of national coastal policy in Section 303 of the Federal Coastal Zone Management Act (CZMA) of 1972 charges the coastal states to meet the objective of coastal resource protection. At this time, when the appropriate mix of authority between federal and state governments concerning environmental regulations is in debate; it is important to determine whether the inter-governmental partnership created by CZMA is effective in protecting coastal resources. This research is an exploratory analysis of coastal management regarding beach and dune protection within the twenty-four coastal states. The dissertation objectives are as follows: (1) determine the level of …

Acid Solubilization Of Fish Protein For Production Of Protein Hydrolysate., Ercument Ozer

LSU Historical Dissertations and Theses

The mechanism of fish protein solubilization by acid hydrolysis at elevated temperatures was investigated. Rate expressions for the solubilization were determined using pilot scale data with two different rate determination methods. A postulated mechanism was verified and estimated rates were evaluated on five independent verification experiments. A functional relationship between nonprotein byproduct concentration and whiteness of fish protein hydrolysate (FPH) was developed. Initial and set-point operating variables were calculated to produce FPH with acceptable color characteristics for food use. A batch reactor was used for duplicate hydrolysis trials conducted at three acid and three temperature levels for four hours. Samples …

Cost Analysis And Air Pollution Impact Of Electric Vehicles On A Metropolitan Area., Hector David Arias-Varela

LSU Historical Dissertations and Theses

During the 1990's, increasing attention has been paid to electric vehicles (EV's) because of their potential to reduce air pollution in metropolitan areas such as the Los Angeles Metropolitan Area in the U.S., Mexico City and Its Metropolitan Area in Mexico, Greater London in the United Kingdom and other urban areas. However, few studies to determine the costs and benefits of reducing air pollution by introducing EV's into these mega cities have been carried out. A model to determine the marginal costs and environmental impact of electric vehicles on a metropolitan area is designed in this study. The model simulates …

An Assessment Of Hydrological Process And Landform Change: Slave River Delta, Northwest Territories, Ronald Brad Hill

Theses and Dissertations (Comprehensive)

The Slave River Delta, 61˚15'N, 113˚30'W, is located at the mouth of the Slave River in the southeast arm of Canada's Great Slave Lake. Although the delta itself lies some 1600 km downstream from the W.A.C. Bennett Dam at Hudson's Hope, British Columbia, the mean annual discharge and sediment load of the Slave River have decreased by 16% and 33% respectively since regulation. Such alterations in the Slave River flow regime have significant implications for the growth of the River Delta since the transfer of sediment to the delta front is one of the most important factors in the landform’s …

Teaching Secondary School Geography With The Use Of A Geographical Information System (Gis), Angela Louise Crechiolo

Theses and Dissertations (Comprehensive)

Until quite recently, geographical information systems have been limited to the resources and students of post-secondary institutions. This situation is now changing in Ontario. In the early 1990's the Ministry of Education adopted mandates to develop curriculum guidelines for the integration of computers into all areas of the curriculum. Although the process is well underway in Ontario, limited access to hardware and software, insufficient pre-service and in-service training, and a paucity of teaching resources has lead to mounting teacher frustration. Although the literature base on teaching GIS at the pre-collegiate level is increasing, it lacks clearly defined examples of how …

Industrial Trade Shows: Their Role And Spatial Dimension In Industrial Restructuring, Andras Gosztonyi

Theses and Dissertations (Comprehensive)

The fundamental changes in the economic environment since the 1970s put firms under immense pressure to adjust their strategies to the increasingly dynamic and flexible global economy. The simultaneous upsurge in industrial trade show activity suggests that these events hold a central position in the process of restructuring. Therefore this study aims at theoretically examining the economic functions of trade shows and thus their role in economic restructuring. Yet, if trade shows are significant in industrial restructuring, it is important to learn about their spatial structure and thus their accessibility to firms in different countries and regions. This is carried …

Reexamination Of Scarp Development Along The Niagara Escarpment, Ontario, Canada, David Walter Hintz

Theses and Dissertations (Comprehensive)

The Niagara Escarpment is generally viewed as a relict landform which shows ancient structural features and the effects of glaciation. Since it was realized that the Escarpment was not a fault, but instead a feature of erosional origin, little interest has been paid to development of the steep cliffed section of the Niagara Escarpment. This research project has several objectives. The first is an examination of the relationship between the morphology of the Escarpment and its geological units. This will include analysis of the structure and lithology of each and the geochemistry, especially, of the Queeston Formation. Associated with the …

A Sensitivity Analysis Of The Hydrology Of The Bow Valley Above Banff, Alberta Using The Ubc Watershed Model, Alexi Zawadzki

Theses and Dissertations (Comprehensive)

Snow and ice meltwater constitutes a significant portion of westem Canada's water resources for residential, industrial and agricultural uses. As a consequence, temporal variations in climate will have a marked effect on the local hydrology of the Canadian Rocky Mountains, especially as glaciers, glacierettes and snow packs decrease in size or melt out. It is therefore very important for hydrologists to accurately understand the climatic sensitivity of glacierized watersheds in order to predict and prepare for potentially dramatic variations in the future water budget. This thesis proposes a methodology for the estimation of the hydrological response of a large, temperate, …

The Impact Of Glacier Recession Upon The Discharge Of The Bow River Above Banff, Alberta, 1951-1993, Christopher Dennis Hopkinson

Theses and Dissertations (Comprehensive)

Three methods have been used to explore the volumetric change of glaciers in the Bow Basin above Banff for the years 1951 to 1993. Using aerial photography, the extent of glacier covers for the two years were mapped at a scale of 1:50,000. The first volumetric calculation of glacier loss was based on inventory criteria; the second a hyposgraphic curve method based on Young’s investigations in Mistaya Basin (1991) and the third stereo air photogrammetry and DEM comparisons using computer software. These methods were applied to the highly glacierized Hector Lake catchment within the Bow Valley and then extrapolated up …

The Kwi Conduit, Volume 5, No. 1, Spring 1997, John E. Mylroie

The KWI Conduit

Contents: KWI Board of Directors Meet -- Ordering KWI Publications -- Conservation and Protection of the Biota of Karst Meeting Attracts a Diverse Field -- Conservation of Karstic Biodiversity -- The KWI Helps Sponsor Sinkhole Meeting -- Cave Conservancy Foundation Graduate Fellowship in Karst Studies -- Upcoming Events of Interest for the Karst Community

Joseph R. And Florence Brunetti V. Gilbert R. Turner, Kenneth T. Holman And Overland Developmental Corp., : Brief Of Appellee, Utah Court Of Appeals

Utah Court of Appeals Briefs (1996–2006)

APPEAL FROM THE JUDGMENT OF THE THIRD JUDICIAL DISTRICT COURT, SALT LAKE COUNTY, STATE OF UTAH THE HONORABLE SANDRA N. PEULER, DISTRICT JUDGE

Dordt College 1997-98 Catalog, Dordt College. Registrar's Office

Academic Catalogs

Academic Catalog for 1997-98

Perceptions Of Businesses On Environmental Regulatory Information, Kimberly K. Gunderson

Dissertations and Theses @ UNI

The purpose of this study was to determine the source and amount of information that a sample of businesses receive on environmental regulatory topics and from what sources they would prefer to receive this information. More specifically, the study demonstrated the discrepancy between the sources from which businesses currently receive their information and the sources from which they would prefer to receive it. The study also addressed how relevant this information was to the businesses and with which regulations the businesses were the most and least knowledgeable. The study was done by conducting a mail-back survey of 500 Iowa small …

A Comparison Of Objective And Subjective Approaches To Temporal Synoptic Clustering : A Case Study Of The Minneapolis-St. Paul Urban Heat Island, Carl V. Dabols

Theses and Dissertations

No abstract provided.

Hi-O-Hi 1997, Oberlin College

Hi-O-Hi Yearbooks

No abstract provided.

Restoration Of An Urban Salt Marsh: An Interdisciplinary Approach, David G. Casagrande

Yale School of the Environment Bulletin Series

No abstract provided.

Bgsu 1997-1998-1999 Undergraduate Catalog, Bowling Green State University

Course Catalogs

Bowling Green State University undergraduate catalog for 1997-1998-1999.

New College Class Of 1997 Commencement Program, New College Of Florida

Office of the Registrar Collection

Six page program detailing the order of events for commencement at the New College of the University of South Florida, including location and dates of events, speakers' names and subjects.

Fortnightly - 1997

Fortnightly Collated by Year

No abstract provided.

Book Review Of Environment And The Law: A Dictionary, James S. Heller

Library Staff Publications

No abstract provided.

Distribution Of Quahog Larvae Along A North-South Transect In Narragansett Bay, Nurlisa A. Butet

Open Access Master's Theses

A study on the distribution of quahog (Mercenaria mercenaria (Linnaeus 1758)) larvae in Narragansett Bay, Rhode Island was conducted during a single summer season in 1995. Samples of the larvae were collected weekly using an electric bilge pump and a 60 um mesh plankton net at two depths (0.3 m and 1.6m) at five sampling stations distributed landward along the West shore, 12.6 kmto 30.6 km from Rhode Island Sound. Three stations were located in the upper estuary, i.e., Upper Bay, and two stations were in the lower estuary, i.e., UpperWest Passage.

The temporal distribution of quahog larvae was …

1997-1998 Course Catalog, University Of Montana--Missoula. Office Of The Registrar

University of Montana Course Catalogs, 1895-2024

An annual catalog of courses and course descriptions offered at the University of Montana.

The Development Of On-Line Microwave Digestion Techniques For Environmental Matrices, Kathryn Judith Lamble

School of Geography, Earth and Environmental Sciences Theses

As a consequence of our advancing knowledge of the impact of trace elements in environmental and biological systems there is increasing need for quantitative analytical techniques to accurately, sensitively and rapidly determine a wide range of trace elements in environmental samples. Since their emergence in 1975 microwave digestion techniques have revolutionised conventional approaches to sample digestion and have rapidly gained widespread acceptance as an effective method of sample preparation. This thesis describes how a number of novel on-line microwave digestion techniques have been developed, characterised and applied to the digestion of a range of environmental matrices which have proved time …

Northeastern News- Winter 1997, Lisa J. Quinn

NEIU News

No abstract provided.

Fyi- Septemebr 1997, University Relations Staff

FYI

No abstract provided.

Bridges To Sustainability: Business And Government Working Together For A Better Environment, Luis Gomez-Echeverri

Yale School of the Environment Bulletin Series

No abstract provided.

Summary Of Issues Concerning The Proposed Unf Gmlc For Students, Tiffany Brainerd, Andy Fairbanks, David Berthiaume

Historical Documents

List of concerns concerning the GMLC compiled by students and proposal for protest.