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The Stereochemistry of 1,4-Di-Tert-Butyl-1,4-Dihydronaphthalene

Description: A new approach was taken in the elucidation of the stereochemistry of the symmetrically 1,4-disubstituted 1,4-dihydronaphthalene systems which show deceptively simple NMR spectra. Thus, the stereochemistry of 1,4-di-tert-butyl-1,4-dihydronaphthalene was established unequivocally. The epoxide derivative, the subject compound, 1,4-di-tertbutyl-2, 3-epoxy-1, 4-dihydronaphthalene, was formed and its trans stereochemistry was established by ¹H NMR and ¹³C NMR. A lanthanide shift study was also condu… more
Date: December 1980
Creator: McDaniel, Oya A.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Analysis of Fission Products on the AGR-1 Capsule Components

Description: The components of the AGR-1 irradiation capsules were analyzed to determine the retained inventory of fission products in order to determine the extent of in-pile fission product release from the fuel compacts. This includes analysis of (i) the metal capsule components, (ii) the graphite fuel holders, (iii) the graphite spacers, and (iv) the gas exit lines. The fission products most prevalent in the components were Ag-110m, Cs 134, Cs 137, Eu-154, and Sr 90, and the most common location was the… more
Date: March 1, 2013
Creator: Demkowicz, Paul A.; Harp, Jason M.; Winston, Philip L. & Ploger, Scott A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Spin Tests of 1/20-Scale Models of the Chance Vought Revised XF6U-1 and F6U-1 Airplanes, TED No. NACA 2390

Description: "An investigation has been conducted in the Langley 20-foot free-spinning tunnel on the 1/20-scale model of the Chance Vought XF6U-1 airplane altered to represent the XF6U-1 airplane as it will be spin-tested in flight, and also altered to represent the F6U-1 airplane as it will be produced for service use. Spin tests were made to determine the effects of control settings and movements at the normal loading. The results show that the spins obtained on the revised XF6U-1 airplane will be oscilla… more
Date: June 28, 1948
Creator: Klinar, Walter J. & Berman, Theodore
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Homologs of Mammalian Lysosomal Lipase in Arabidopsis and Their Roles in Lipid Droplet Dynamics

Description: Lipid droplets (LDs) are organelles with many functions in cells and numerous protein interactors facilitate their biogenesis, maintenance, and turnover. The mammalian lipase responsible for LD turnover during lipophagy, LipA, has two candidate homologs in Arabidopsis: MPL1 and LIP1. One or both of these plant homologs may function in a similar manner to mammalian LipA, providing an LD breakdown pathway. To test this hypothesis, wild type (WT) Arabidopsis plants, MPL1 over-expressing (OE) muta… more
Date: December 2017
Creator: McClinchie, Elizabeth A
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Characterization of 200-UP-1 and 200-ZP-1 Operable Unit Aquifer Sediments and Batch Adsorption Distribution Coefficients for Contaminants of Concern--Fiscal Year 2006 Progress

Description: A total of six core samples from 200-UP/ZP-1 OUs and two additional outcrop samples were characterized during FY2006 by PNNL. One sample (C4971) was identified as slough and not used, but the five other samples identified as intact core samples were used for further analyses. The C4977 sample is gravel-sandy silt and C4990 samples are fine-sandy silt from the Ringold formation. Although the sediments from these two boreholes have similar mineralogical composition, C4990 samples show higher valu… more
Date: September 25, 2006
Creator: Um, Wooyong & Serne, R. Jeffrey
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Environmentally responsible recycling of thin-film cadmium telluride photovoltaic modules. Final technical report

Description: Continuing from the third quarter, all technical objectives of this Phase II SBIR work were previously and successfully completed. This report is therefore brief and contains two elements (1) a comparison of technical objective accomplishments to the stated goals in the original grant proposal (2) a summary of the third key element of this work; a market analysis for the developed recycling technology systems.
Date: September 9, 2002
Creator: Bohland, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Role of the Ubiquitin Proteasome System (UPS) in the HIV-1 Life Cycle

Description: This article is an overview the interplay between HIV-1 viral and cellular proteins for restrictions/competitions for proliferation of the virus in the infected cell, which could open a new avenue for the development of therapeutics against HIV-1 via targeting a specific step of the proteasome degradation pathway during the HIV-1 life cycle.
Date: June 19, 2019
Creator: Rojas, Vivian K. & Park, In-Woo
Item Type: Refine your search to only Article
Partner: UNT Health Science Center
open access

Expression and Function of Transient Receptor Potential Ankyrin 1 Ion Channels in the Caudal Nucleus of the Solitary Tract

Description: The article describes a study that tested and confirmed the hypothesis that TRPA1 expressed in the primary sensory afferents may modulate the function of second order NTS neurons. The expression of TRPA1 was detected in presynaptic locations, but not the somata of caudal NTS neurons that did not express TRPA1 mRNA or proteins. Moreover, caudal NTS neurons did not show somatodendritic responsiveness to TRPA1 agonists, while TRPA1 immunostaining was detected only in the afferent fibers.
Date: April 26, 2019
Creator: Feng, Lin; Uteshev, Victor V. & Premkumar, Louis S.
Item Type: Refine your search to only Article
Partner: UNT Health Science Center
open access

Structural Octatonicism in Cindy McTee's Symphony No.1: Ballet for Orchestra

Description: Cindy McTee's Symphony No. 1: Ballet for Orchestra is composed primarily of pitch materials from the octatonic collections that contain both diatonic and non-diatonic relationships in the themes, harmonic content, and larger structure of the symphony. Because the octatonic collections contain the potential for both diatonic and non-diatonic relationships, the piece is argued to have octatonic structure, as the octatonic collection is capable of producing both relationships. The second chapter c… more
Date: August 2007
Creator: Weaver, Jennifer L.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

COMPARISON OF BULK SHIELDING REACTOR CENTERLINE MEASUREMENTS IN WATER WITH PREDICTIONS

Description: Measurements of fast neutron and gamma ray dose rates in water along the centerline of the Bulk Shielding Reactor (BSR) are compared with predictions made by use of three available computer programs. It is found that the predictions are very dependent on the assumptions made concerning power distribution and that the more accurate descriptions of the source lead to predictions that agree with measurements to within 20% throughout thickness ranges as great as 100 centimeters of water. (auth)
Date: November 1, 1958
Creator: Casper, A.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final Report for Regulation of Embryonic Development in Higher Plants

Description: The overall goal of the project was to define the cellular processes that underlie embryo development in plants at a mechanistic level. Our studies focused on a critical transcriptional regulator, Arabidopsis LEAFY COTYLEDON (LEC1), that is necessary and sufficient to induce processes required for embryo development. Because LEC1 regulates lipid accumulation during the maturation phase of embryo development, information about LEC1 may be useful in designing approaches to enhance biofuel product… more
Date: October 22, 2013
Creator: Harada, John J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Data Report on Post-Irradiation Dimensional Change of AGC-1 Samples

Description: This report summarizes the initial dimensional changes for loaded and unloaded AGC-1 samples. The dimensional change for all samples is presented as a function of dose. The data is further presented by graphite type and applied load levels to illustrate the differences between graphite forming processes and stress levels within the graphite components. While the three different loads placed on the samples have been verified [ ref: Larry Hull’s report] verification of the AGC-1 sample temperatur… more
Date: June 1, 2012
Creator: Windes, William
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Microscopic analysis of irradiated AGR-1 coated particle fuel compacts

Description: The AGR-1 experiment involved irradiation of 72 TRISO-coated particle fuel compacts to a peak burnup of 19.5% FIMA with no in-pile failures observed out of 3×105 total particles. Irradiated AGR-1 fuel compacts have been cross-sectioned and analyzed with optical microscopy to characterize kernel, buffer, and coating behavior. Five compacts have been examined so far, spanning a range of irradiation conditions (burnup, fast fluence, and irradiation temperature) and including all four TRISO coating… more
Date: October 1, 2012
Creator: Ploger, Scott; Demkowicz, Paul; Hunn, John & Morris, Robert
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Analyzing the Principal Perspective to Lead the Implementation of Learning Technologies in Public Schools: A Multi-Strategy Study

Description: As technologies for learning become increasingly available in K-12 schools, the role and responsibilities of campus principals continue to evolve. Incorporating technologies in schools requires shifts in practices, the development of new skills, and in some cases, changes in the mindset of stakeholders. Schools should be capable of absorbing the knowledge and creating the systemic structures required for the implementation ICTs. The purpose of this study was to research the principals' perspect… more
Date: December 2021
Creator: Orta, Nelson A
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Preliminary results of post-irradiation examination of the AGR-1 TRISO fuel compacts

Description: Five irradiated fuel compacts from the AGR-1 experiment have been examined in detail in order to assess in-pile fission product release behavior. Compacts were electrolytically deconsolidated and analyzed using the leach-burn-leach technique to measure fission product inventory in the compact matrix and identify any particles with a defective SiC layer. Loose particles were then gamma counted to measure the fission product inventory. One particle with a defective SiC layer was found in the five… more
Date: October 1, 2012
Creator: Demkowicz, Paul; Hunn, John; Morris, Robert; Harp, Jason; Winston, Philip; Baldwin, Charles et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Wind-Tunnel Tests of the 0.15-Scale Powered Model of the Fleetwings XBTK-1 Airplane: Longitudinal Stability and Control

Description: "An investigation was made of the static longitudinal stability, and control and stall characteristics of XBTK-1 dive bomber. Results indicate that the longitudinal stability will probably be satisfactory for all contemplated flight conditions at the rear-most CG location with elevator both fixed and free. Power effects were small. Sufficient elevator control will be available to trim in any flight condition above the ground" (p. 1).
Date: May 1945
Creator: Weil, Joseph & Boykin, Rebecca I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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