Teses / dissertações sobre o tema "Collector of Excise"
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Keefe, Martha L. (Martha Lundin). "Excuses for the Universe". Thesis, North Texas State University, 1985. https://digital.library.unt.edu/ark:/67531/metadc504600/.
Texto completo da fonteMa, Jianqiang. "Photodissociation Dynamics and Collision Energy Transfer of Highly Excited SO2". Diss., Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/213110.
Texto completo da fontePh.D.
As one of the simplest tri-atomic molecules, SO2 is extremely important in various fields in chemistry. SO2 is released by volcanoes and various industrial processes including combustion of sulfur containing fuel, and is well known to be the key chemical that causes the acid rain on earth. Therefore, SO2 has been studied intensively in both atmospheric chemistry as well as combustion chemistry. SO2 has also been discovered in extraterrestrial environment. For example, it is reported to be the most abundant gas observed in the atmosphere of Jupiter's moon, Io[1]. It has therefore generated great interests in the planetary chemistry as well. Even though understanding the structure, spectroscopy and reaction dynamics of SO2 has been of great and fundamental interests for more than 50 years, there are yet some very interesting topics, particularly those related to highly excited SO2, that require further investigations. In this thesis, we combine time-resolved Fourier transform infrared emission spectroscopy with theoretical modeling to study selected interesting problems relevant to highly excited SO2. First, the photodissociation of SO2 molecule by 193 nm photons is investigated. The role of different predissociation channels of electronically excited SO2 is carefully defined. Secondly, the excitation of SO2 by hot H atoms, a topic important in combustion and atmospheric chemistry, is examined. The energy transfer mechanism is identified and discussed. This newly discovered energy transfer mechanism involves the formation of the reactive intermediate species, which will greatly enhance the energy transfer efficiency on top of the classical impulsive type of collision mechanisms. In addition, the collision quenching of highly vibrationally excited SO2 with about 32,000 cm-1 energy is studied. It is found that the long range interactions contribute significantly to vibration to vibration (V-V) energy transfer. The contributions from both long range and impulsive mechanisms are discussed in detail. The studies presented in this thesis have provided important insight on the collision energy transfer and reaction dynamics of highly excited SO2 that would be useful in assessing the behavior of this important molecule in atmospheric, planetary, and combustive environments.
Temple University--Theses
Serwaah, Bonsu Amma. "Comparative retrospective analysis assessment of extracellular volume excess in hypertensive hemodialysis patients". Doctoral diss., University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5040.
Texto completo da fonteID: 029808737; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (D.N.P.)--University of Central Florida, 2011.; Includes bibliographical references (p. 74-81).
D.N.P.
Doctorate
Nursing
Nursing Practice
Dah, Mustafa A. "Essays on the Effect of Excess Compensation and Governance Changes on Firm Value". Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5179.
Texto completo da fonteID: 031001341; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Title from PDF title page (viewed April 15, 2013).; Thesis (Ph.D.)--University of Central Florida, 2012.; Includes bibliographical references.
Ph.D.
Doctorate
Business Administration
Business Administration; Finance
Howerton, Peggie A. "Path to chaos : excess, absence and anarchy in Tennyson's Idylls of the King". Master's thesis, University of Central Florida, 1993. http://digital.library.ucf.edu/cdm/ref/collection/RTD/id/24015.
Texto completo da fontePauszek, Raymond Francis. "Excited state charge redistribution and dynamics of flavins, flavorproteins, and their cofactors". Diss., Temple University Libraries, 2013. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/245456.
Texto completo da fontePh.D.
The excited state electronic structures of several biologically important chromophores were studied by Stark spectroscopy. The extent of charge redistribution upon excitation to the lowest excited states of the oxidized and semiquinone forms of flavin adenine dinucleotide (FAD) bound to the light activated DNA repair enzyme DNA photolyase have been studied previously by this technique. This work focuses on the catalytically active form, the two-electron reduced anion. To facilitate analysis of this experiment, the Stark spectra of a simple flavin derivative that is soluble in organic solvents was measured. The results of the analysis of these data are in agreement with previously a published linear dichroism experiment that found the absorption spectrum of flavins in this redox state arises from two distinct electonic transitions in the visible/near-ultraviolet spectral range, a fact that has not been incorporated into the analysis of many ultrafast spectroscopic experiments of reduced anionic flavins/flavoproteins. The difference dipole moment of the second, more intense, transition was found to be about twice as large as that of the lowest energy transition. With the aid of ab initio calculations, the directions of these dipole moments in the molecular frame were assigned. For both transitions, it was found that negative charge density is shifted toward the xylene ring of the flavin upon excitation. Another important consideration for the correct analysis of the photolyase spectra is the possibility of contamination by small amounts of the antenna chromophore, which also has absorption intensity in the near-ultraviolet region. We chose to study the cofactor for E. coli photolyase, 5,10-methenyltetrahydrofolate, and its photodecomposition product, 5,10-methylenetetrahydrofolate. The difference dipole moments for the lowest energy transitions of both of these chromophores were found to be quite large, ranging from 9-12 D fc and lying primarily along the transition dipole moment. Additionally, the difference polarizability of both chromophores was large, on the order of 200-300 Å3 fc2 . The Stark spectra of reduced anionic FAD in photolyase agrees well with the findings of the experiments on flavin in organic solvent; the magnitude of the difference dipole moments in both cases match within experimental error. While the direction of the difference dipole moment for the lowest transition is also the same in both cases, that of the second transition is changed in the protein matrix. The assignment of these vectors in the molecular frame shows that the two dipole moments are coincident for the cofactor bound to photolyase. This finding, where electron density is shifted toward the point of the flavin ring closes to the DNA lesion bound to the enzyme, is strong evidence that direct electron transfer takes place from the isoalloxazine ring of FAD to the DNA substrate in the catalytic cycle. The usefulness of Stark spectroscopy in investigating photoinduced charge redistribution was also shown for the donor-π-acceptor flavin dyad, azobenzylflavin (ABFL). The difference dipole moment was found to be 22 D, an approximately three-fold increase from the largest difference dipole moment found in naturally occurring flavins. This extensive charge redistribution corresponds to a large hyperpolarizability of the chromophore that suggests that ABFL may be useful in nonlinear optical applications. Transient absorption was used to supplement these experiments by monitoring the decay kinetics of ABFL after excitation. It was found that ABFL undergoes ultrafast charge recombination within 6 ps after excitation, leading to depopulation of the charge separated state before useful work can be performed for applications requiring electron transfer. These studies provide the ground work for rational design of other ABFL-like derivatives for use in a variety of applications.
Temple University--Theses
Barnard, David Thomas. "EXCITED STATE DYNAMICS AND CHARGE REDISTRIBUTION OF EXTREMOPHILE DNA PHOTOLYASE AND FLAVIN COFACTORS". Diss., Temple University Libraries, 2018. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/597264.
Texto completo da fontePh.D.
Repair mechanisms for damaged DNA are essential for the proliferation of nearly all forms of life. Although DNA is quite robust, the vital information-storing molecule can often be damaged from environmental exposures such as ultra-violet (UV) light. Exposure to UV light can result in various types of mutagens creating structural damages. One specific type of UV-induced damage is the creation of a cyclobutylpyrimidine dimer (CPD). This specific type of lesion can be efficiently repaired by the flavoenzyme DNA photolyase (PL). DNA photolyase is an ancient protein found across kingdoms and plays a crucial role in preventing mutagenesis and cell death. DNA photolyase is a monomeric flavoprotein that utilizes blue light to repair UV-induced CPD lesions in DNA via an electron transfer mechanism. All photolyases contain at least one flavin adenine dinucleotide (FAD) molecule as the catalytic cofactor responsible for initiating the electron transfer induced repair process. Flavin cofactors are intriguing because of their unique ability to donate one or two electrons. The conservation of FAD and the unique U-shaped configuration of FAD in PL led researchers to question if the adenine moiety of the FAD molecule was essential in the DNA repair mechanism and generated a spectral signature indicative of a radical adenine species. The importance of the adenine moiety could be linked to structural changes associated with environmental temperature. The rate of electron transfer is exponentially dependent on temperature and DNA photolyase is found in organisms which thrive in harsh environments that vary in temperature, pH, ionic strength etc. Photolyase presents a unique opportunity to study the adaptations that are required for proteins to function in extreme environments where temperature dependent processes should show dramatic differences. We have used ultrafast transient absorption spectroscopy to compare the similarities and differences in excited state dynamics of the FAD cofactor. Photolyase isolated from the hyperthermophilic archaea Sulfolobus solfataricus (SsPL) is compared to PL isolated from the mesophilic E. coli (EcPL). These results indicate differences in the dynamics of fully reduced flavin between enzymes as a function of temperature. We present evidence for charge separation in the FAD cofactor in the thermophilic enzyme previously seen in computation studies of photolyase. To investigate the excited state charge redistribution of flavin which is critical to its role in nature, the charge redistribution of the precursors to flavin biosynthesis were examined. Lumazine is a precursor in the biosynthetic pathway of flavins. As such, lumazine could have served as an enzymatic cofactor prior to flavins. Lumazine has been identified in biological processes, however it is not as prevalent as flavins. We utilize Stark spectroscopy to examine the charge redistribution in excited state lumazine to understand
Temple University--Theses
Hales, Katherine J. "Synthesis, Characterizations, and Evaluation of New Reactive Two-Photon Absorbing Dyes for Two-Photon Excited Fluorescence Imaging Applications". Doctoral diss., University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3575.
Texto completo da fontePh.D.
Department of Chemistry
Arts and Sciences
Biomolecular Sciences: Ph.D.
yu, shenjiang. "NEW DEVELOPMENTS ON HIGH-RESOLUTION LUMINESCENCE SPECTROSCOPY AND THEIR APPLICATION TO THE DIRECT ANALYSIS OF ORGANIC POLLUTANTS". Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4075.
Texto completo da fontePh.D.
Department of Chemistry
Sciences
Chemistry: Ph.D.
Kodali, Goutham. "Excited state electronic properties of DNA photolyase and fluorescent nucleobase analogues (FBA): An experimental and theoretical study". Diss., Temple University Libraries, 2009. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/58803.
Texto completo da fontePh.D.
An overexposure to ultraviolet radiation can cause sunburn and some forms of skin cancer. UV light causes many different photoproducts. The cys-syn cyclobutylpyrimidine dimer (CPD) is the major photoproduct upon UV irradiation. DNA photolyase (PL) is a light-driven flavoprotein that repairs CPD in UV-damaged DNA. This repair process occurs in the presence of blue light through ultrafast photo-induced electron transfer from reduced anionic flavin adenine dinucleotide (FADH¯) to the CPD by an unknown mechanism. Since the excited state flavin transfers an electron to repair the damaged DNA, it is of utmost importance that we understand better the excited state properties of the flavins. In this work the excited state electronic properties of all three-oxidation states of flavin: oxidized form (FAD), semiquinone radical form (FADH•) and reduced anionic form (FADH¯) were studied using Stark spectroscopy and complimented by time dependent density functional theory (TD-DFT) calculations. These results are presented and discussed in Chapter 3 and 4. The difference dipole moments (Δμ) and the difference polarizabilities (Tr(Δα01)) were experimentally determined for first two lowest optically accessible states. The results are discussed in the context of photoreduction of flavins in wider class of flavoprotein blue light photoreceptors and catalytic electron transfer process in DNA repair. In the later part of this thesis (Chapters 5 and 6) the excited state electronic properties of monomeric 2-Aminopurine (2AP), 8-Vinyladenine 8VA were presented. These 8VA, 2AP are examples of fluorescent nucleotide analogues of adenine that can be incorporated into DNA with little perturbation of the normal double-helical structure. The fluorescence of these analogues is quenched when incorporated in double-stranded DNA (dsDNA). The basic mechanism underlying the fluorescence quenching by base stacking of 2AP and 8VA are is not well understood, and thus exploring the excited state electronic structures of these bases is an important first step. We have explored the excited state properties of 2AP and 8VA in frozen LiCl and ethanol solutions using Stark spectroscopy. High-level ab initio and TD-DFT calculations were performed to compliment the experimental results.
Temple University--Theses
Hilaire, Stéphane. "Calculs microscopiques des densités de niveaux nucléaires avec la force de Gogny". Grenoble INPG, 1997. http://www.theses.fr/1997INPG0056.
Texto completo da fonteLu, Zhen. "DEVELOPMENT OF HIGH LEVEL AB INITIO METHODS TO DESCRIBE NONADIABATIC EVENTS AND APPLICATIONS TO THE EXCITED STATES OF SMALL BIOLOGICAL MOLECULES". Diss., Temple University Libraries, 2015. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/320918.
Texto completo da fontePh.D.
The development of quantum mechanics has historically allowed researchers to theoretically explore the fundamental physical properties of atoms and molecules. Although quantum mechanics has been around for almost a century, its use was largely limited by the computational complexity it demanded. In the past decade, computer technology has evolved to the point where it is possible to perform calculations on biologically relevant systems. This has allowed us to corroborate results obtained from experiment as well as predict and explain phenomena that experiment cannot. Unfortunately, the field as a whole has not progressed to the point where high level methods, such as Multi-Reference Configuration Interaction (MRCI), are applicable to large molecular systems. Thus, to effectively study these systems, compromises must be made. In this work, two different approaches are taken to study the photophysical properties of systems such as DNA. In the first approach, a model system is formulated and studied in lieu of the larger target system. The excited state dynamics of 8-oxoguanine (8-oG) and its anion are studied in order to assess the possibility of taking part in an electron transfer mechanism to repair a nearby cyclobutane pyrimidine dimer (CPD). It is found that barriers on the anion S1 excited state surface prohibits easy access to conical intersections with the ground state, causing the anion to have a much longer excited state lifetime than the neutral form. Although much insight can be gained by this method, it is not uncommon for crucial interactions to be lost through simplification. In this case, when 8-oG is placed in an adenine dinucleotide, the π stacking interaction allows it to form a long lived radical base pair, which may be fundamental to its role in CPD repair. Unfortunately, it is impossible to carry out the same excited state calculations for the 8-oG/adenine dinucleotide due to computational cost. For reasons such as these, we also implement and benchmark a new approach to carrying out high level configuration interaction calculations in which the MRCI is expanded in the basis of high multiplicity natural orbitals (HMNOs). Specifically, the HMNO approach is implemented by expanding the MRCI wavefunction in the basis of natural orbitals generated from a ground state high multiplicity Configuration Interaction Singles and Doubles (CISD) calculation. Excited state calculations both at and away from the Franck-Condon region were performed to benchmark the ability of the HMNO approach using CISD and MRCI to reproduce standard MRCI energies. The ability of the HMNOs to be truncated was also explored, yielding efficient truncation criteria and guidelines for choosing the best basis set. It is found that the MRCI/HMNO approach yields energies that are in excellent agreement with standard MRCI while only requiring a fraction of the computational effort, possibly allowing it to be applied to larger systems such as nucleotide dimers.
Temple University--Theses
Zhou, Rongwei. "New Polyazine-Bridged Ru(II),Rh(III) and Ru(II),Rh(I) Supramolecular Photocatalysts for Water Reduction to Hydrogen Applicable for Solar Energy Conversion and Mechanistic Investigation of the Photocatalytic Cycle". Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/50832.
Texto completo da fontePh. D.
Щедров, І. А. "«Маркетингові дослідження та бізнес-план створення підприємства з виробництва аксесуарів зі шкіри". Thesis, Чернігів, 2021. http://ir.stu.cn.ua/123456789/22861.
Texto completo da fonteОб’єктом дослідження є процес маркетингових досліджень проникнення на зовнішні ринки підприємства з виробництва аксесуарів зі шкіри. Предметом дослідження є теоретичні, методичні та практичні аспекти створення бізнес-плану та маркетингової стратегії підприємства з виробництва аксесуарів зі шкіри. Мета і завдання дослідження. Метою дослідження є розробка бізнес-плану та маркетингових стратегій проникнення на ринки підприємства з виробництва шкіряних аксесуарів. Методи дослідження. Теоретичною і методологічною основою дослідження є праці вітчизняних та зарубіжних вчених з проблем формування маркетингових товарних стратегій та бізнес-планів підприємства. Дослідження ґрунтується на системному методі пізнання процесів і явищ.
Wilson, Walter. "Novel Developments on the Extraction and Analysis of Polycyclic Aromatic Hydrocarbons in Environmental Samples". Doctoral diss., University of Central Florida, 2014. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6384.
Texto completo da fontePh.D.
Doctorate
Chemistry
Sciences
Chemistry
Nayyar, Iffat. "Prediction of Optical Properties of Pi-Conjugated Organic Materials for Technological Innovations". Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5993.
Texto completo da fontePh.D.
Doctorate
Physics
Sciences
Physics
Vivier, Sigolene. "Désenclaver le bref : pratiques contemporaines de la nouvelle chez William H. Gass, Steven Millhauser et David Foster Wallace". Thesis, Sorbonne université, 2020. http://www.theses.fr/2020SORUL121.
Texto completo da fonteWhile the minimalist short story has often been explored by contemporary criticism, this study wishes to focus on the resolutely more expansive and excessive style to be found in the shorter works of William Gass, Steven Millhauser and David Foster Wallace. Nonetheless, their stories guide the reader through an experience of reticence as they withhold the promise of revelation or resolution. Given that theoretical approaches to the short story are wont to emphasize its supposedly inherent concision, the stories of these three writers seem to deliberately transgress this preconception by consistently pushing their structural and metaphorical boundaries. Indeed, the texture of their narrative voices, depicting the tortuous introspections of characters prone to highly reflexive discourses, the constant weaving of poetic leitmotive as well as an omnipresent thirst for detail shape a prose which asserts itself as a firm counterpoint to minimalism. This constant renegotiation of what brevity means also fuels the philosophical tenets of their prose, often characterized by various aporetic patterns and considerations which confront the reader with a heuristic approach to indeterminacy. Gass, Millhauser and Wallace therefore constantly play with the implications of brevity in their stories, which are neither short nor concise, thereby contributing to the definition of a new literary epistemology in the context of contemporary American literature
Gravier, Laurent. "Etude magnéto-optique des effets dépendants des spins de porteurs dans des structures de puits quantiques GaAs/GaAlAs en modulation de dopage". Université Joseph Fourier (Grenoble), 1996. http://www.theses.fr/1996GRE10083.
Texto completo da fonte"Evaluating the effectiveness of tax collection system at customs and excise in Lesotho". Thesis, 2007. http://hdl.handle.net/10413/1088.
Texto completo da fonteThesis (MBA)-University of KwaZulu-Natal, 2007.