Resource Type

Language

Oral History Interview with James L. McClain, September 15, 1988 (open access)

Oral History Interview with James L. McClain, September 15, 1988

Interview with James L. McClain, a United States Navy veteran from Ancell, Missouri, regarding his experiences and memories of the Japanese attack on Pearl Harbor of December 7, 1941 while aboard the light cruiser USS Honolulu.
Date: September 15, 1988
Creator: Marcello, Ronald E. & McClain, James L.
System: The UNT Digital Library
San Simon Cattle Company: Stockholders Minute Book (open access)

San Simon Cattle Company: Stockholders Minute Book

Book of meeting minutes from the San Simon Cattle and Canal Company stockholders meetings. Oaths from the members and the by-laws of the company are written into the beginning of the book.
Date: 1885-09-15/1917-12-10
Creator: San Simon Cattle and Canal Company
System: The Portal to Texas History
The use of microarrays in microbial ecology (open access)

The use of microarrays in microbial ecology

Microarrays have proven to be a useful and high-throughput method to provide targeted DNA sequence information for up to many thousands of specific genetic regions in a single test. A microarray consists of multiple DNA oligonucleotide probes that, under high stringency conditions, hybridize only to specific complementary nucleic acid sequences (targets). A fluorescent signal indicates the presence and, in many cases, the abundance of genetic regions of interest. In this chapter we will look at how microarrays are used in microbial ecology, especially with the recent increase in microbial community DNA sequence data. Of particular interest to microbial ecologists, phylogenetic microarrays are used for the analysis of phylotypes in a community and functional gene arrays are used for the analysis of functional genes, and, by inference, phylotypes in environmental samples. A phylogenetic microarray that has been developed by the Andersen laboratory, the PhyloChip, will be discussed as an example of a microarray that targets the known diversity within the 16S rRNA gene to determine microbial community composition. Using multiple, confirmatory probes to increase the confidence of detection and a mismatch probe for every perfect match probe to minimize the effect of cross-hybridization by non-target regions, the PhyloChip is able to …
Date: September 15, 2009
Creator: Andersen, G. L.; He, Z.; DeSantis, T. Z.; Brodie, E. L. & Zhou, J.
System: The UNT Digital Library
Associations between iron oxyhydroxide nanoparticle growth and metal adsorption/structural incorporation (open access)

Associations between iron oxyhydroxide nanoparticle growth and metal adsorption/structural incorporation

The interaction of metal ions and oxyanions with nanoscale mineral phases has not yet been extensively studied despite the increased recognition of their prevalence in natural systems as a significant component of geomedia. A combination of macroscopic uptake studies to investigate the adsorption behavior of As(V), Cu(II), Hg(II), and Zn(II) onto nanoparticulate goethite ({alpha}-FeOOH) as a function of aging time at elevated temperature (75 C) and synchrotron-based X-ray studies to track changes in both the sorption mode and the rate of nanoparticle growth reveal the effects that uptake has on particle growth. Metal(loid) species which sorb quickly to the iron oxyhydroxide particles (As(V), Cu(II)) appear to passivate the particle surface, impeding the growth of the nanoparticles with progressive aging; in contrast, species that sorb more slowly (Hg(II), Zn(II)) have considerably less impact on particle growth. Progressive changes in the speciation of these particular metals with time suggest shifts in the mode of metal uptake with time, possibly indicating structural incorporation of the metal(loid) into the nanoparticle; this is supported by the continued increase in uptake concomitant with particle growth, implying that metal species may transform from surface-sorbed species to more structurally incorporated forms. This type of incorporation would have implications …
Date: September 15, 2008
Creator: Kim, C. S.; Lentini, C. J. & Waychunas, G. A.
System: The UNT Digital Library
The Value of Renewable Energy as a Hedge Against Fuel Price Risk: Analytic Contributions from Economic and Finance Theory (open access)

The Value of Renewable Energy as a Hedge Against Fuel Price Risk: Analytic Contributions from Economic and Finance Theory

For better or worse, natural gas has become the fuel of choice for new power plants being built across the United States. According to the Energy Information Administration (EIA), natural gas-fired units account for nearly 90% of the total generating capacity added in the U.S. between 1999 and 2005 (EIA 2006b), bringing the nationwide market share of gas-fired generation to 19%. Looking ahead over the next decade, the EIA expects this trend to continue, increasing the market share of gas-fired generation to 22% by 2015 (EIA 2007a). Though these numbers are specific to the US, natural gas-fired generation is making similar advances in many other countries as well. A large percentage of the total cost of gas-fired generation is attributable to fuel costs--i.e., natural gas prices. For example, at current spot prices of around $7/MMBtu, fuel costs account for more than 75% of the levelized cost of energy from a new combined cycle gas turbine, and more than 90% of its operating costs (EIA 2007a). Furthermore, given that gas-fired plants are often the marginal supply units that set the market-clearing price for all generators in a competitive wholesale market, there is a direct link between natural gas prices and wholesale …
Date: September 15, 2008
Creator: Bolinger, Mark A. & Wiser, Ryan
System: The UNT Digital Library
The effect of temperature on the speciation of U(VI) in sulfate solutions (open access)

The effect of temperature on the speciation of U(VI) in sulfate solutions

Sulfate, one of the inorganic constituents that could be present in the nuclear waste repository, forms complexes with U(VI) and affects its migration in the environment. Results show that the complexation of U(VI) with sulfate is enhanced by the increase in temperature. The effect of temperature on the complexation and speciation of U(VI) in sulfate solutions is discussed.
Date: September 15, 2008
Creator: Rao, Linfeng & Tian, Guoxin
System: The UNT Digital Library
Tonality As Drama: Closure and Interruption in Four Twentieth-century American Operas (open access)

Tonality As Drama: Closure and Interruption in Four Twentieth-century American Operas

Whether you are “in the business,” or you are a music theorist, musicologist, or simply an opera fan—read on! This is an analytical monograph by a Schenkerian music theorist, but it is also written by one performer and enthusiast for another. Tonality as Drama draws on the fields of dramaturgy, music theory, and historical musicology to answer a fundamental question regarding twentieth-century music: why does the use of tonality persist in opera, even after it has been abandoned in other genres? Combining the analytical approaches of the leading music and dramatic theorists of the twentieth century—Austrian music theorist Heinrich Schenker (1868-1935) and Russian director Constantin Stanislavsky (1863-1938)—Edward D. Latham reveals insights into works by Scott Joplin, George Gershwin, Kurt Weill, and Aaron Copland that are relevant to analysts, opera directors, and performers alike. Tonality as Drama is not a textbook—rather, it is an innovative analytical study meant to inspire changes in the study and performance of tonal opera. By applying Schenker’s tonal analytical technique to a small segment (early twentieth-century American opera) of a repertoire typically regarded as non-tonal (modern opera), Latham reveals a strategic use of tonality in that repertoire as a means of amplifying or undercutting the success …
Date: September 15, 2008
Creator: Latham, Edward D.
System: The UNT Digital Library
Trip Report - Will Rogers World Airport Air Guard - June 9, 2005 (open access)

Trip Report - Will Rogers World Airport Air Guard - June 9, 2005

Trip Report - Will Rogers World Airport Air Guard - June 9, 2005
Date: September 15, 2005
Creator: United States. Defense Base Closure and Realignment Commission.
System: The UNT Digital Library
Commissioner's Base Visit Book - Battle Creek Air National Guard, MI Closure Recommendations - July 29, 2005 (open access)

Commissioner's Base Visit Book - Battle Creek Air National Guard, MI Closure Recommendations - July 29, 2005

Commissioner's Base Visit Book - Battle Creek Air National Guard, MI Closure Recommendations - July 29, 2005
Date: September 15, 2005
Creator: United States. Defense Base Closure and Realignment Commission.
System: The UNT Digital Library