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A Characterization Of Jackson Blue Spring, Jackson County, Florida
Jackson Blue is a first magnitude spring in the karst terrane of northeast Florida. Previous studies have identified inorganic fertilizer as the source of high nitrate levels in the spring. Agricultural land use and karst vulnerability make Jackson Blue a good model for conservation concerns. This work offers an aggregation of studies relating to the springshed, providing a valuable tool for planning and conservation efforts in the region. An analysis of nitrate levels and other water quality parameters within the springshed did not reveal significantly different values between agricultural and forested land use areas. Confounding factors include: high transmissivity in the aquifer, interspersed land use parcels, and fertilizer application in forested areas due to commercial pine stand activity.
Date:
December 2011
Creator:
Reiser, Cora
System:
The UNT Digital Library
Muenster, Texas: A Centennial History
Muenster, Texas, in Cooke County, began in 1889 through efforts of German-American colonizing entrepreneurs who attracted settlers from other German-American colonies in the United States. The community, founded on the premise of maintaining cultural purity, survived and prospered for a century by its reliance on crops, cattle, and oil. In its political conservatism and economic ties to the land, Muenster resembled its neighboring Anglo-American communities. Its Germanic heritage, however, became pronounced in the community's refusal to accommodate to the prohibitionism of North Texas regarding alcoholic beverages and in the parishioners' fidelity to the Roman Catholic faith. These characteristics are verified in unpublished manuscripts, governmental documents, local records, and interviews with Muenster residents.
Date:
August 1988
Creator:
McDaniel, Robert Wayne
System:
The UNT Digital Library
Bacterial Survey of the Sources of Drinking Water of Trinidad, Texas, with Special Reference to Sanitation
A bacterial analysis of the water from thirty-six sources of consumption by the white population of Trinidad, Henderson County, Texas, was made to determine the potability of each of these in regard to infection from typhoid or related organisms.
Date:
1944
Creator:
Coldwell, Lavenia Ruth
System:
The UNT Digital Library
The Brazos Valley Groundwater Conservation District: A Case Study in Texas Groundwater Conservation
This thesis examines the history of groundwater management through the development of groundwater conservation districts in Texas. Political, economic, ideological, and scientific understandings of groundwater and its regulation varied across the state, as did the natural resource types and quantities, which created a diverse and complicated position for lawmakers and landowners. Groundwater was consistently interpreted as a private property right and case law protected unrestricted use for the majority of the twentieth-century even as groundwater resources crossed property and political boundaries, and water tables declined particularly during the second-half of the century. The case study of the Brazos Valley Groundwater Conservation District describes the complicated history of groundwater in Texas as the state attempted to balance natural resource legislation and private property rights and illuminate groundwater’s importance for the future.
Date:
August 2011
Creator:
Teel, Katherine
System:
The UNT Digital Library
Irrigation Methods and Their Effects on Irrigation Water Efficiency in High Tunnels
Improving water efficiency is and will continue to be a top concern to meet the world food production demands for a growing population. By having a clear understanding of water efficiencies, communities will be able to address these concerns from an economic standpoint and use more productive methods to grow food and limit water consumption. This study examines the water efficiencies of three irrigation methods over a single growing season in southeastern Oklahoma. Two crops, tomatoes and cucumbers, were grown using drip irrigation, a self-wicking container, and a non-circulating hydroponics barrel. Results at the end of the season showed the drip irrigation method had the highest water efficiency in terms of yield of product over water applied for both crops. The drip irrigation method also had the lowest associated set up costs and second lowest time requirements after the hydroponics method. These results were found to be consistent with other studies that compared drip irrigation to other irrigation methods and showed drip to have the highest water efficiencies.
Date:
December 2019
Creator:
Young, Lauren
System:
The UNT Digital Library
Hypoxia and the Development of Endothermic Capacity in Chickens (Gallus Gallus)
Adult chickens employ endothermy – internal generation of heat that maintains a constant body temperature (Tb). Prior to hatching, chicken embryos are ectothermic - controlling Tb by external heat sources. Upon hatching, the hatchling transitions from an ectotherm to an endotherm that has been shown to be delayed by hypoxia. In this study, whole animal oxygen consumption () and liver, heart, and skeletal muscle citrate synthase activity (CSA) and were measured during this transition to endothermy in chickens incubated in normoxia and hypoxia (15% O2). The only significant differences in occurred in 48 hour old hatchlings where was lower in normoxic hatchlings. There were no differences in CS activity between age and incubation oxygen levels. Additionally, preliminary 2-D protein gels of embryo and hatchling liver show changes in the proteome upon hatching. Results suggest that hypoxia had no significant effect on CSA and a minimal effect on .
Date:
August 2012
Creator:
Neely, Aaron Mackallan
System:
The UNT Digital Library
The Portrait of a Boom Town: Burkburnett
This thesis details the history of Burkburnett, Texas through the early 1800s through the early 1950s.
Date:
August 1952
Creator:
Benton, Minnie M.
System:
The UNT Digital Library
The Public Lands of Texas and Their Use for the Benefit of Education
When a new government is established, sovereign and national in its character, all of the land within its jurisdiction belongs to the people, not as individuals, but as a whole, except that which may have been theretofore acquired by individuals under such rights as may be respected by the new government. The land which has not been acquired by individuals is known as the public domain, and is subject to such disposition as the new government might determine. This thesis will review the public lands of Texas and how those lands have been used with a strong focus on the endowment of these lands to the public education system.
Date:
August 1949
Creator:
Webb, John W., Jr.
System:
The UNT Digital Library
Use of GIS to Identify and Delineate Areas of Fluoride, Sulfate, Chloride, and Nitrate Levels in the Woodbine Aquifer, North Central Texas, in the 1950s, 1960s, 1970s, 1980s, and 1990s
ArcView and ArcInfo were used to identify and delineate areas contaminated by fluoride, sulfate, chloride, and nitrate in the Woodbine Aquifer. Water analysis data were obtained from the TWDB from the 1950s to 1990s covering 9 counties. 1990s land use data were obtained to determine the relationship with each contaminant. Spearman's rank correlation coefficients and Kruskal-Wallis tests were used to calculate relationships between variables. Land uses had little effect on distributions of contaminants. Sulfate and fluoride levels were most problematic in the aquifer. Depth and lithology controlled the distributions of each contaminant. Nitrate patterns were controlled mainly by land use rather than geology, but were below the maximum contaminant level. In general, contaminant concentrations have decreased since the 1950s.
Date:
August 2001
Creator:
Sanmanee, Sirichai
System:
The UNT Digital Library
The Economic Development of the Rio Grande Plain
The study of the economic development of the Rio Grande Plain has been divided into the following seven chapters: (1) Physical Aspects of the Rio Grande Plain, (2) Grazing, (3) Development of Farming, (4) Development of Transportation, (5) Growth of Major Urban Centers, (6) Development of Natural Resources, and (7) Present Trends. In each chapter except Chapters I and VII, effort has been made to locate the origin of that particular industry and trace its development. In order to understand the development in the raising of livestock, farming, transportation, natural resources, and the growth of major cities of the region, it would be well to understand the physical aspects of the region.
Date:
August 1950
Creator:
Masters, Noble M.
System:
The UNT Digital Library
Water systems, water policy, and Karst terrain: An analysis of the complex relationships between geology, economy, public perceptions, and policy in southern Trelawny, Jamaica.
Access:
Use of this item is restricted to the UNT Community
Jamaica has an abundance of freshwater resources, however, a lack of infrastructure makes treated, piped water inaccessible in many areas. Through literature reviews and site visits, this thesis is an analysis of how the people and land, and money and policy, interact with one another in relation to Jamaica's freshwater resources and water infrastructure. Special attention is given to the island's type-example Cockpit karst geology; tourism, mining, and farming's relation to this karst; types of water delivery systems in rural southern Trelawny's Cockpit Country; southern Trelawny residents' perceptions of the water situation; and policy and development goals in the context of Jamaica and southern Trelawny. I hope to bring attention to the unique social, geologic, and developmental context of water in Jamaica, and more specifically to garner attention for major water infrastructure improvements in south Trelawny. A number of recommendations for improvements with policy and infrastructure are made.
Date:
December 2005
Creator:
McCall, Sarah
System:
The UNT Digital Library
Kinzua Dam: a Study in the Congressional Disruption, Relocation-Resettlement, and Rehabilitation of the Seneca Nation of Indians
This thesis embraces four major topics coinciding with the four considerations designated in President John F. Kennedy's letter to President Basil Williams of the Seneca Nation and the reactions to those items generated during numerous hearings of the House Subcommittee on Indian Affairs. The four topics covered in the President's letter include the possibility of acquiring adjacent property, commonly referred to as "in lieu of" lands, to replace the Indian real estate taken for the Allegheny Reservoir; a review of the reservoir's recreational potential for the benefit of the Seneca Nation; special damages accruing to the Senecas for the loss of their land; and relocation and resettlement.
Date:
January 1969
Creator:
Verelst, Robert
System:
The UNT Digital Library
“Valentine’s Day” and Other Works
The following collection includes three short stories and two essays compiled with a critical preface. “Valentine’s Day” explores the limits of friendship and love in various situations including, two road trips (one fictional and one factual), pet ownership, and the impersonations of Frank Sinatra.
Date:
May 2012
Creator:
Thornburg, Chrissie
System:
The UNT Digital Library
The Western Sahara Conflict
The purpose of investigating the conflict over the Western Sahara is to trace and analyze its impact upon the political stability of the northwest region of the African continent. Chapter I provides background information on the Western Sahara. Chapter II discusses the international political developments affecting the Western Sahara. Chapter III discusses the positions of Morocco, the Polisario, Algeria, and Mauritania; Chapter IV analyzes those of Spain, France, the Soviet Union, and the United States. Chapter V describes the role of the OAU in dealing with the conflict. The internal economic development of the involved parties has been disrupted because they were obliged to appropriate funds to purchase arms for the exigencies of the war. Ending the conflict depends upon improving relations between Morocco and Algeria.
Date:
May 1983
Creator:
Radhi, Samir Jassam
System:
The UNT Digital Library
Economic Development of the Oil and Natural Gas Sector in Bahrain
The problem with which this investigation is concerned is determining the viability of economic development in the oil and natural gas sector in Bahrain since its independence in August 1971, and the changing role of the government in shaping oil policies and managing downstream operations. This inquiry emphasizes the importance of cooperation and coordination in the oil industry among the Arab Gulf States. This study concludes that Bahrain's economy is passing through and era which will have one of two possible endings: one will protect the independence of the country and promote cooperation with the other Arab Gulf States as a transitional stage toward a board regional unity; the other will lead Bahrain to become a commercial outlet for Saudi Arabia.
Date:
December 1984
Creator:
Sadik, Abdullah
System:
The UNT Digital Library
History of Railway Development in China
This study attempts to provide detailed analysis of materials gathered from various sources and to an orderly presentation of facts and figures regarding railway construction in China.
Date:
August 1938
Creator:
Dawson, Homer W.
System:
The UNT Digital Library
Interweaving History: The Texas Textile Mill and McKinney, Texas, 1903-1968.
Texas textile mills comprise an untold part of the modern South. The bulk of Texas mills were built between 1890 and 1925, a compressed period of expansion in contrast to the longer developmental pattern of mills in the rest of the United States. This compression meant that Texas mill owners benefited from knowledge gained from mill expansion elsewhere, and owners ran their mills along the same lines as the dominant southeastern model. Owners veered from the established pattern when conditions warranted. This case study focuses on three mills in Texas that operated both independently and as a corporation for a total of sixty years. One mill in McKinney dominated the economy of a small town and serves as the primary focus of this paper. A second mill in Waco served a diversified economy in the center of the state; and the third mill, built in Dallas was concentrated in a major city in a highly competitive job market. All three of these mills will illuminate the single greatest difference between Texas mills and mills elsewhere, the composition of the labor force. Women did not dominate the mill labor force in Texas nor did children, except in limited cases, make-up a …
Date:
August 2009
Creator:
Kilgore, Deborah Katheryn
System:
The UNT Digital Library
American Export Trade with Mexico
The purpose of the study is to make a survey and analysis of the export trade of the United States with Mexico. Attention is given to the kinds and types of goods exported to Mexico and imported from it, to the value of the trade, to some ways of carrying it on, and to aspects of Mexican life that influence trade relations.
Date:
1948
Creator:
Williams, Donald Earl
System:
The UNT Digital Library
Identification and Characterization of the Pyrimidine Biosynthetic Operon in Streptomyces griseus
To further understand the ATCase/DHOase bifunctional complex formed in Streptomyces, the genes encoding these and other pyrimidine enzymes were identified and characterized. Polymerase chain reaction (PCR) was utilized in this effort. Primers were constructed by selecting conserved regions of pyrimidine genes from known gene and protein sequences of a wide variety of organisms. These sequences were then optimized to Streptomyces codon usage. PCR products were obtained from internal sites within pyrimidine genes and also from primer combinations of different genes. The size, orientation, and partial sequence of the resulting products shows that Streptomyces has a gene organization of pyrR followed by pyrB, pyrC, carA, carB, and pyrF in an operon similar to that found in other Gram-positive bacteria.
Date:
May 1998
Creator:
Hooten, Jody J. (Jody Jeran)
System:
The UNT Digital Library
A History of the Schools of Cooke County, Texas
"This is an effort to tell the story of public education in Cooke County, Texas...."-- leaf 1.
Date:
August 1944
Creator:
O'Brien, Randolph
System:
The UNT Digital Library
An Investigation of Methods for the Concentration of Chemical Compounds Produced by Actinomycetes and Their Relation to Tastes and Odors in Municipal Water Supplies
It is the purpose of this investigation to improve upon techniques to enhance the taste of municipal water and attempt to devise one that could desorb the compounds from carbon in an unaltered state. It was decided that the odor character would be the criterion used to decide if the eluted compounds were the same as those in the raw water.
Date:
1957
Creator:
Brown, Jerry H.
System:
The UNT Digital Library
Corrosion Protection of Aerospace Grade Magnesium Alloy Elektron 43™ for Use in Aircraft Cabin Interiors
Magnesium alloys exhibit desirable properties for use in transportation technology. In particular, the low density and high specific strength of these alloys is of interest to the aerospace community. However, the concerns of flammability and susceptibility to corrosion have limited the use of magnesium alloys within the aircraft cabin. This work studies a magnesium alloy containing rare earth elements designed to increase resistance to ignition while lowering rate of corrosion. The microstructure of the alloy was documented using scanning electron microscopy. Specimens underwent salt spray testing and the corrosion products were examined using energy dispersive spectroscopy.
Date:
August 2013
Creator:
Baillio, Sarah S.
System:
The UNT Digital Library
To Determine a Sound Source of Public School Revenue in Texas
The purpose of this study is to attempt to determine a sound source of public school revenue in the state of Texas.
Date:
1947
Creator:
Davis, William Wilson
System:
The UNT Digital Library
Life in the Early Mining Camps of Colorado
The story of the advancing American frontier has unending interest. Perhaps one of the most colorful and unusual frontier developments was that of the mining frontier in the Rocky Mountains of Colorado. During the years following the discovery of gold in 1858 and the early 1880's occurred an almost unprecedented evolution from a primitive pioneer society to complex industrial development.
Date:
August 1954
Creator:
Smith, Charles O.
System:
The UNT Digital Library