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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Accurate ionic bond energy measurements with TCID mass spectrometry and imaging PEPICO spectroscopy

Rowland, Tyson G. 01 January 2012 (has links)
Two projects are presented here. In the first, metal-cyclopentadienyl bond dissociation energies (BDEs) were measured for seven metallocene ions (Cp2M+, Cp = η5-cyclopentadienyl = c-C5H5, M = Ti, V, Cr, Mn, Fe, Co, Ni) using threshold collision-induced dissociation (TCID) performed in a guided ion beam tandem mass spectrometer. For all seven room temperature metallocene ions, the dominant dissociation pathway was simple Cp loss from the metal. Traces of other fragment ions were also detected, such as C10H10+, C10H8+, C8H8+, C3H3+, H2M+, C3H3M+, C6H6M+, and C7H6M+, depending on the metal center. Statistical modeling of the Cp-loss TCID experimental data, including consideration of energy distributions, multiple collisions, and kinetic shifts, allow the extraction of 0 K [CpM+ - Cp] BDEs. These are found to be 4.95 ± 0.15, 4.02 ± 0.14, 4.22 ± 0.13, 3.51 ± 0.12, 4.26 ± 0.15, 4.57 ± 0.15, and 3.37 ± 0.12 eV for Cp2To+, Cp2V+, Cp2Cr+, Cp2Mn+, Cp2Fe+, Cp2Co+, and Cp2Ni+, respectively. The measured BDE trend is largely in line with arguments based on a simple molecular orbital picture, with the exceptions of a reversal in Cp2Mn+ and Cp2Ni+ BDEs (although within uncertainty), and the exceptional case of titanocene, most likely attributable to its bent structure. The new results presented here are compared to previous literature values and are found to provide a more complete and accurate set of thermochemical parameters. In the second project, imaging photoelectron photoion coincidence (iPEPICO) spectroscopy has been used to determine 0 K appearance energies for the unimolecular dissociation reactions of several energy selected 1-alkyl iodide cations n-CnH2n+1I+ → CnH2n+1+ + I, (n = 2-5). The 0 K appearance energies of the iodine-loss fragment ions were determined to be 9.836 ± 0.010, 9.752 ± 0.010, 9.721 ± 0.010, and 9.684 ± 0.010 eV for n-C3H7I, n-C4H9I, n-C5H11I, and n-C6H13I molecules, respectively. Isomerization of then-alkyl iodide structures into 2-iodo species adds complexity to this study. Using literature adiabatic ionization energies, ionic bond dissociation energies were calculated for the four modeled iodoalkyl cations and it was shown that as the alkyl chain length increases, the carbon-halogen bond strength decreases, supporting the suggestions set forth by inductive effects. In the modeling with statistical energy distributions and rate theory, the role of hindered rotors was also evaluated and no strong experimental evidence was found either way. The heaviest species in the series, heptyl iodide (C7H15I) was also measured via iPEPICO and showed to have a greater complexity of fragmentation than the lighter analogs. Sequential dissociation of the first fragment ion, C7H15+ leads to C4H9+, C5H11+, and C3H7+ ions in competitive dissociation processes, dominated at low energies by the C4H9+ cation.
32

Correlates of verbal aggression and physical aggression among post- adolescent students

Lancaster-Knobel, Esther S. 01 January 2012 (has links)
This study explored the correlation between verbal aggression and physical aggression among post-adolescent students, and included demographic factors such as biological sex, socioeconomic status, and the highest education level achieved by parents. The study is predicated on a paucity of evidence regarding the relationship among these factors in young adults. Two-hundred thirty-eight community college students responded to a self-report questionnaire designed to measure individual differences and demographic characteristics. Results indicate that verbal aggression and physical aggression are significantly correlated and that males report higher verbal aggression than females. Gender differences for physical aggression were not significantly different. None of the other demographic variables demonstrated significant differences. Implications are discussed in terms of societal benefits of preventative treatment for verbal aggression and the role that communication scholarship and education might play in intervention.
33

The recombinant expression and localization of TvCP2 of trichomonas vaginalis

Wakukawa, Christopher Keith 01 January 2012 (has links)
Trichomonas vagina/is, one of the most common sexually transmitted diseases, has been shown to increase patients' susceptibility to HIV infection and cervical cancer; moreover, resistance to metronidazole is increasing, and new drug targets must be identified in order to combat resistant strains. T vagina/is expresses cysteine proteases that have been implicated in vaginal epithelial apoptosis as well as immune system evasion. In the past the various cysteine proteases have been studied as a group, and the following work examines, one specific protease, TvCP2, in detail through Western blot analysis, immunofluorescent staining, and recombinant expression. The experiments 5 presented here suggest that aT l-CP2 over-expressing transfectant line processes CP2 and sequesters it in cellular compartments. Previous data gives strong evidence of the secretion of cysteine protease CP4 and hints at the possibility of CP2 secretion as well; however, our results show no co-localization between CP2 and CP4 in T l-CP2 over expressing transfectants, suggesting separate trafficking and different roles. To better characterize CP2 function, we attempted to express active, recombinant protein. Although Pichia pastoris serves as a reliable expression vehicle, a processing event following translation ofTvCP2 appears to have cleaved the pro-domain and, along with it, the a-secretion signal, trapping active TvCP2 within the cellular pellet. A thioreoxintagged version ofTvCP2 has been expressed in E. coli, and preliminary experiments show it may auto-activate under certain conditions, but further experimentation is required to confirm the presence of active CP2 within the fraction purified from these cells.
34

A study of the congressional hearings on the dismissal of General MacArthur

Scott, Byford 01 January 1960 (has links)
The eye witnesses against MacArthur were members of the Truman Administration. Acheson and Marshall were the principal critics of MacArthur’s stand. Secretary Acheson testified that MacArthur had done a fine job in Japan and our allies agreed without policy there. Acheson replied to the alleged lack of policy by making a distinction between our policy and our war aims. Our policy in Korea looked to a unified, independent democratic government, but our war aim was to stop the attack on South Korea. Regarding the proposal that the United States take unilateral action if our allies did not support us, he said that our collective-security system could not survive if we took action other members of the system disapproved. He opposed the use of Nationalist troops on the grounds that it would weaken the defense of Formosa, and was complicated by other nations fighting in Korea that did not recognize the Nationalist Government. Finally Acheson denied that MacArthur was not allowed to issue battle communiques on the real military situation in Korea. However he felt that the General’s release of March 20 concerning truce negotiations gave the impression that the United States was speaking with two voices. Secretary of Defense George Marshall has a military point of view and at the same time a global picture of the situation. He believed that the Nationalist forces would not be effective in Korea. He testified that MacArthur’s removal was necessitated by his public disagreement with the foreign and defense policies of the United States. He made it clear that MacArthur had not violated any military policy, but he had made public his disagreement with it to such a degree that it interfered with the carrying out of that policy. All of the Joint Chiefs of Staff, Marshall testified, concurred in the relief of General MacArthur. General Bradley’s testimony was probably the most damaging to MacArthur. The principal point bought out by Bradley was that MacArthur’s strategy would involve us in the wrong war, at the wrong place, at the wrong time, and with the wrong enemy. He pointed out that we also had sanctuary since the Chinese did not bomb out ports and supply bases. He felt that a blockade would involve the ports of Hong Kong and Dairen, and therefore would not be tenable. Furthermore, MacArthur was not in agreement with the decision to limit the conflict to Korea, and his actions, Bradley said, jeopardized the civilian control of the military authorities. Both Generals Breadeley and Collins agreed that they would have to resign and speak out in case they were involved in a conflict in which duty and the best interest of the country could not be reconciled.
35

The use of obsessions and delusions as a tragic device in the major plays of Eugene O'Neill

Thomas, Ruth Bartlett 01 January 1942 (has links)
This introductory chapter contains definitions of obsessions and delusions, and examines the validity of these ideas as tragic devices. It discusses obsessions from the point of view of Freud and Jung. The major plays of Eugene O’Neill have been divided into three psychological types: the first type we shall call the statement-of-the-problem plays; the second, the simple anima plays; the third, the complex anima plays. These terms and divisions will be explained as we proceed.
36

Aldous Huxley : a study in a changing philosophy

Charette, Lee Quellen 01 January 1940 (has links)
"Art," besides being art, "is also philosophy," Aldous Huxley says in Vulgarity in Literature. Throughout the years in which he has been writing, Huxley has never lost sight of this dictum. His philosophy has ever formed an integral part of all that he has produced, and especially has it been basic in his novels. Because of the importance of philosophy to Huxley, the artist, I have aimed in this study at following the course of his changing philosophy. I have tried to present Huxley in his early years advocating a philosophy of meaninglessness and then, after becoming dissatisfied with such an interpretation of life, evolving a kind of pseudo-humanistic theory which he later discarded in favor of a mystical interpretation of the universe. In addition to showing the "what" of Huxley's philosophy, I have attempted to search out its "whys" as well. I have held his theories up to the light of the sociological background of his times and to the light of his own personality. That is, I have decided that the philosophy to which he holds and has held is subject ot the dictates of social change and to the dictates of his own nature.
37

Seagull beach

Mostafa, Dona E. 01 January 1996 (has links)
Seagull Beach is a creative work about a woman who moves to a seaside town. While there, she is befriended by an artist and volunteers at the aquarium. The woman, Shell, becomes involved in a mystery involving drug smuggling and murder. Shell and her friend, Linda, solve the mystery through a series of unexpected events. Chapter one establishes Shell in Seagull Beach and introduces Linda. The plot begins with a mutilated dolphin on the beach and the appearance of a bald-headed man. Chapter two takes the reader into the aquarium and expands the cast of characters. The plot is further developed during a party scene when an angry exchange is overheard by Shell. The plot thickens, in chapter three, with the meeting of three men in an all night cafe. Later on, Shell sees a picture of the mysterious bald-headed man, in the local newspaper. Chapter three ends with the discovery of Roger's body. Chapter four has Shell and Linda trying to make some sense of Roger's death. Shell receives Roger's diary on the afternoon of his funeral. Chapter five is an important chapter for this work. It is here that we get a glimpse of a drug encounter that sets up the following scene between the drug smugglers. The use of dolphins as drug runners is also established. In the final two scenes, Shell's RV is ransacked, and the man who killed the dolphin is also killed. The suspense heightens in chapter six as Shell and Linda break into Roger's office. Shell later sees the drug delivery take place and has a confrontation as she walks across a dark parking lot. The work ends with an unexpected revelation and a conversation between Shell and Linda.
38

C.S. Lewis : fantasy as an illumination of reality

Gregory, Eloise Cheney 01 January 1967 (has links)
The purpose of this thesis is to study C. S. Lewis's use of fantasy to illuminate reality by contrasting the world as he saw it with his imaginary worlds. To do this, it is necessary to describe the various types of books he wrote, to illustrate the view of reality presented in his writing, and then to examine the different types of fantasy he used in his books.
39

The popularity and influence of Shakespeare's English and Roman historical plays in America from the beginnings to 1950

Warren, Ruth 01 January 1955 (has links)
Poetry and romance in Shakespeare's non-historical plays have come into their own again with revivals of The Tempest directed by Margaret Webster and with the production of As You Like It, which features Katherine Hepburn. Unfortunately, the time limit of this paper has been set for the end of 1950, so it is only possible to mentin in passing Laurence Oliver's and Vivian Leigh's exciting and unique idea of presenting Shaw's Caesar and Cleopatra and Shakespeare's Antony and Cleopatra on alternate nights. In spite of early curtains, which make it necessary for the theatre-goer to eat his dinner in a hurry, the two Cleopatras have been playing to packed houses, first in London, then in New York in 1951 and 1952. From 1750 to 1950, I should like to consider each of the history plays separtely and in detain, to show how and why their stars rose and fell upon the American horison.
40

Estudio de la obra literaria del chileno Eduardo Barrios : a tésis ...

Peal, Edithie Ventura 01 January 1962 (has links)
The eye witnesses against MacArthur were members of the Truman Administration. Acheson and Marshall were the principal critics of MacArthur’s stand. Secretary Acheson testified that MacArthur had done a fine job in Japan and our allies agreed without policy there. Acheson replied to the alleged lack of policy by making a distinction between our policy and our war aims. Our policy in Korea looked to a unified, independent democratic government, but our war aim was to stop the attack on South Korea. Regarding the proposal that the United States take unilateral action if our allies did not support us, he said that our collective-security system could not survive if we took action other members of the system disapproved. He opposed the use of Nationalist troops on the grounds that it would weaken the defense of Formosa, and was complicated by other nations fighting in Korea that did not recognize the Nationalist Government. Finally Acheson denied that MacArthur was not allowed to issue battle communiques on the real military situation in Korea. However he felt that the General’s release of March 20 concerning truce negotiations gave the impression that the United States was speaking with two voices. Secretary of Defense George Marshall has a military point of view and at the same time a global picture of the situation. He believed that the Nationalist forces would not be effective in Korea. He testified that MacArthur’s removal was necessitated by his public disagreement with the foreign and defense policies of the United States. He made it clear that MacArthur had not violated any military policy, but he had made public his disagreement with it to such a degree that it interfered with the carrying out of that policy. All of the Joint Chiefs of Staff, Marshall testified, concurred in the relief of General MacArthur. General Bradley’s testimony was probably the most damaging to MacArthur. The principal point bought out by Bradeley was that MacArthur’s strategy would involve us in the wrong war, at the wrong place, at the wrong time, and with the wrong enemy. He pointed out that we also had sanctuary since the Chinese did not bomb out ports and supply bases. He felt that a blockade would involve the ports of Hong Kong and Dairen, and therefore would not be tenable. Furthermore, MacArthur was not in agreement with the decision to limit the conflict to Korea, and his actions, Bradeley said, jeopardized the civilian control of the military authorities. Both Generals Breadeley and Collins agreed that they would have to resign and speak out in case they were involved in a conflict in which duty and the best interest of the country could not be reconciled.

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