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Relative Yields of Nitrogen-17 Produced by 190-Mev Deuteron Bombardment

Description: "Yields of N¹⁷ relative to that produced in LiF have been measured in the 190-Mev deflected deuteron and the 380-Mev alpha beams of the 184-inch synchrocyclotron. The measurements have been performed in all the light elements from 0 through V, with the exception of Sc and the noble gases. In addition, yields were measured in the separated isotopes of Mg...Comparisons are made with other types of yield studies performed with neutrons and protons, and the areas of agreement are noted."
Date: April 13, 1955
Creator: Chupp, Warren William
Partner: UNT Libraries Government Documents Department
open access

Imaging gene expression in real-time using aptamers

Description: Signal transduction pathways are usually activated by external stimuli and are transient. The downstream changes such as transcription of the activated genes are also transient. Real-time detection of promoter activity is useful for understanding changes in gene expression, especially during cell differentiation and in development. A simple and reliable method for viewing gene expression in real time is not yet available. Reporter proteins such as fluorescent proteins and luciferase allow for n… more
Date: December 13, 2011
Creator: Shin, Il Chung
Partner: UNT Libraries Government Documents Department
open access

The Production of Neutral Hyperons by 5-Bev π$sup -$ Mesons

Description: Neutral hyperons produced by 5-Bev The effects of /sup -/ mesons incident on a large propane bubble chamber are analyzed in detail with respect to production cross sections and angular distributions of production and decays and the A lifetime is measured. The cross section for neutralhyperon (Y/sup 0/) production by the reaction The effects of /sup -/ + p 1100 deg C are Y/sup 0/ + K is 0.98 sintering time 0.16 mb. The cross section for carbon mpacting ( The effects of - + C 1100 deg C are Y/sup… more
Date: April 13, 1959
Creator: Hotz, D. F.
Partner: UNT Libraries Government Documents Department
open access

Two Topics in Pion Physics. [Part] 1. Photoproduction of Neutral Pions From Complex Nuclei and the Pair-Correlation Function. [Part] 2. The Relative Rate of Absorption of Negative Pions in Hydrogen and Deuterium

Description: A simple theory of the photoproduction of pi /sup 0/ mesons from complex nuclei based on the impulse and closure approximation is studied. The theory is compared with an experiment of Goodwin, Anderson, and Kenney that shows the dependence of the number of decay gammas from pi /sup 0/ mesons photo- produced from various nuclei as a function of the atomic number at 45, 90, and 135 degrees for incident photon energies from threshold to 350 Mev. The dependence measured near threshold and at 45 deg… more
Date: August 13, 1962
Creator: Traxler, R. H.
Partner: UNT Libraries Government Documents Department
open access

Matrix Isolation Studies of High-Temperature Species Group II Chlorides

Description: A matrix isolation technique for the investigation of infrared absorption spectra of molecules of hightemperature species trapped in a pseudo- gas phase'' is described. The spectra of the dichlorides of zinc, cadmium, and mercury in argon, krypton, and xenon matrices are reported. Presence in the gas phase of dimers of zinc chloride and mercuric chloride is noted. An absorption band, previously reported as due to the degenerate bending motion of zinc chloride, is attributed to zinc dimer. (auth) more
Date: September 13, 1962
Creator: McNamee, R. W., Jr.
Partner: UNT Libraries Government Documents Department
open access

Investigation of the Wett-Ability of Various Pure Metals and Alloys on Beryllium

Description: Thesis submitted to University of Tennessee, Knoxville. Activities in a program to determine the wetting behavior of pure metals such as Au, Ag, Ge, Al, and Cu on solid Be are reported. Results of similar investigations of binary alloys such as Be--Ti, Be-Zr, and Be--Pd are also included. The contact angles of the molten metals on Be as a function of temperature, exposure time, and atmosphere were measured. The solid-liquid interfacial reactions occurring as a function of test temperature and a… more
Date: June 13, 1963
Creator: Gilliland, R. G.
Partner: UNT Libraries Government Documents Department
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Gas atomized precursor alloy powder for oxide dispersion strengthened ferritic stainless steel

Description: Gas atomization reaction synthesis (GARS) was employed as a simplified method for producing precursor powders for oxide dispersion strengthened (ODS) ferritic stainless steels (e.g., Fe-Cr-Y-(Ti,Hf)-O), departing from the conventional mechanical alloying (MA) process. During GARS processing a reactive atomization gas (i.e., Ar-O{sub 2}) was used to oxidize the powder surfaces during primary break-up and rapid solidification of the molten alloy. This resulted in envelopment of the powders by an … more
Date: December 13, 2011
Creator: Rieken, Joel
Partner: UNT Libraries Government Documents Department
open access

Observation of the submillimeter cosmic background spectrum

Description: An experimental measurement of the spectrum of the submillimeter cosmic background radiation is described. The experiment consists of measuring the night sky emission at an altitude of 39 km, correcting for the atmospheric molecular line emission, and placing limits on the contamination from sources of continuum radiation such as the apparatus itself and the earth. The observations were made on 24 July 1974 using a fully calibrated liquid-helium-cooled balloon- borne spectrophotometer. Importan… more
Date: November 13, 1975
Creator: Woody, D.P.
Partner: UNT Libraries Government Documents Department
open access

Sum-Frequency Generation from Chiral Media and Interfaces

Description: Sum frequency generation (SFG), a second-order nonlinear optical process, is electric-dipole forbidden in systems with inversion symmetry. As a result, it has been used to study chiral media and interfaces, systems intrinsically lacking inversion symmetry. This thesis describes recent progresses in the applications of and new insights into SFG from chiral media and interfaces. SFG from solutions of chiral amino acids is investigated, and a theoretical model explaining the origin and the strengt… more
Date: February 13, 2006
Creator: Ji, Na
Partner: UNT Libraries Government Documents Department
open access

From Radian Waves to Data Streams: Media Environments in DeLillo and Shteyngart

Description: Undergraduate thesis examining representations of media and technology in two contemporary American novels, "White Noise" by Don DeLillo (1985) and "Super Sad True Love Story" by Gary Shteyngart (2010), with the goal of elucidating the attributes and significance of the technological contexts in fiction as well as contributing to a broader discussion of its operations on consciousness, society, and the cultural imagination.
Date: June 13, 2014
Creator: Young, Michael
Partner: UNT Honors College
open access

National Identity and Anxiety in the Captivity Narratives of Mary Rowlandson and Mary Godfrey

Description: Undergraduate thesis expanding exploring the 1836 captivity narrative "An Authentic Narrative of the Seminole War; and the Miraculous Escape of Mrs. Mary Godfrey, and Her Four Female Children." Unlike Mary Rowlandson's "The Sovereignty and Goodness of God," the anonymously-authored "An Authentic Narrative" is almost certainly fabricated. There are no records of a Mrs. Mary Godfrey being captured and redeemed, or even existing at all. However, like Rowlandson's captivity narrative, it attempts t… more
Date: June 13, 2014
Creator: Smith, Caitlin
Partner: UNT Honors College
open access

Quantum groups: Geometry and applications

Description: The main theme of this thesis is a study of the geometry of quantum groups and quantum spaces, with the hope that they will be useful for the construction of quantum field theory with quantum group symmetry. The main tool used is the Faddeev-Reshetikhin-Takhtajan description of quantum groups. A few content-rich examples of quantum complex spaces with quantum group symmetry are treated in details. In chapter 1, the author reviews some of the basic concepts and notions for Hopf algebras and othe… more
Date: May 13, 1996
Creator: Chu, C. S.
Partner: UNT Libraries Government Documents Department
open access

Measurement of time dependent B{sub d}{sup 0} {bar B}{sub d}{sup 0} mixing parameter using opposite side lepton and D* meson in p{bar p} collisions at {radical}s = 1.8 TeV

Description: This thesis presents the results from the investigation of time dependent B{sub d}{sup 0} {bar B}{sub d}{sup 0} mixing in B {yields} lepton X, B{sub d}{sup 0} {yields} D*{sup -} {yields} {bar D}{sup 0} {pi}{sup -}, {bar D}{sup 0} {yields} K{sup +} {pi}{sup -} channel in p{bar p} collisions at {radical}s = 1.8 TeV using 110 pb{sup -1} data collected with the CDF detector at the Fermilab Tevatron Collider. The {bar D}{sup 0} vertex is reconstructed. The B{sub d}{sup 0} decay length is estimated u… more
Date: January 13, 1998
Creator: Vandenbrink, S.C.
Partner: UNT Libraries Government Documents Department
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