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Toward polar 1,4-diphenylbutadiene materials
(University of Missouri--Columbia, 2004)
The fast response time of [pi]-electrons makes organic materials increasing interesting as highly anisotropic materials. We are especially interested in dipole parallel-aligned crystals because of the much higher chromophore ...
Reactivity of lesions derived from abasic (AP) sites in DNA
(University of Missouri--Columbia, 2021)
DNA is vital to cellular function. Therefore, maintaining the integrity of the structure of DNA is of the utmost importance. Damage to the DNA is unavoidable and can be detrimental to organisms. Abasic (Ap) sites are the ...
Probing supramolecular assemblies via fluorescent reporter molecules
(University of Missouri--Columbia, 2007)
the organization of the capsule interior when fluorescent reporter molecules, (1-(9-anthryl)-3-(4-dimethylaniline) propane) and pyrene butyric acid, became entrapped. Solution state spectroscopic data, in agreement with solid state single crystal X...
Novel insights into strand cleavage at an abasic site in DNA
(University of Missouri--Columbia, 2022)
Loss of a nucleobases from the deoxyribose backbone of DNA generates Abasic sites in DNA. Abasic sites are the most common unavoidable DNA damage lesion. It is important to understand the properties of Abasic site. The ...
Chemical mechanisms underlying the medicinal activity of metabolically-activated N-oxide antitumor agents
(University of Missouri--Columbia, 2008)
Tirapazamine (TPZ) belongs to a new class of bio-reductively activated hypoxiaselective anti-cancer agents and is currently undergoing in various clinical trials including Phase I, II and III. Anti-cancer activity of TPZ ...
Ammonia elimination from protonated nucleobases
(University of Missouri--Columbia, 2007)
The dediazoniations of the diazonium ion 1 of 4-aminopyrimidine and of the tautomeric cytosinediazonium ions 2 and 3 are facile and result in the formations of cations 4, 5, and 6. The pyrimidine ring-opening of 4, 5 and ...
Design and construction of multicomponent spheroidal assemblies on the nano-scale via the self-assembly approach
(University of Missouri--Columbia, 2006)
reported within the literature use metal-ions as the directing influence in ligand assembly (i.e. without the metal-ions, the ligands would not assemble into spheroidal structures). However the C-alkylpyrogallol[4]arene molecules can assemble into hexameric...
Novel chemical mechanisms of DNA damage by natural products
(University of Missouri--Columbia, 2007)
formed by this compound in double stranded DNA. We report here that depurination of this N7-alkylguanine lesion is unusually facile. This is very relevant to its biological activity because an in vitro study done in a preclinical report shows...
DNA interstrand crosslinks arising from DAN strand breaks at true abasic sites in duplex DNA
(University of Missouri--Columbia, 2018)
of DNA interstrand crosslinks arising from these single strand breaks, which structures are dependent on changing DNA sequence contexts and varied assay conditions that are all bio-relevant. These structures are novel and haven't been reported to the best...
Inactivation of protein tyrosine phosphatases by endogenous and dietary agents
(University of Missouri--Columbia, 2009)
disrupting signaling pathways inside cells. It is possible that these small molecules are exerting their widely reported biological effect by the modification of protein tyrosine phosphatase activity. This information is critical to our understanding...
Molecular basis of protein tyrosine phosphatase inhibition by biologically important small molecules with relevance to cell signaling pathways
(University of Missouri--Columbia, 2009)
Protein tyrosine phosphatase 1B (PTP1B) is an abundant mammalian enzyme and well known to be as a central player in the insulin and leptin signaling pathways. Peracetic acid is a strong oxidant molecule, endogenously ...
Diverse applications of covalent cross-links in duplex DNA: From anti-cancer drugs to the detection of disease-relevant single nucleotide polymorphisms to the synthesis of well-defined substrates for the study of novel DNA repair processes
(University of Missouri--Columbia, 2018)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Abasic (Ap) sites are a common form of DNA lesion that occur endogenously 50,000-200,000 per cell per day in mammals. The alkylation of the guanine and ...
Synthesis, characterisation photophysical and DFT studies of 2,2'-diphenylenegold(III) diethyldithiocarbamate
(University of Missouri--Columbia, 2012)
emitting diodes (OLEDs). The efficiency of OLED can be improved by incorporating heavy metal atom like gold. In this manuscript we report the synthesis, characterization and photophysical studies of 2,2'-diphenylenegold(III) diethyldithiocarbamate 1. We...
Applications of elemental analysis for archaeometric studies : analytical and statistical methods for understanding geochemical trends in ceramics, ochre and obsidian
(University of Missouri--Columbia, 2006)
Three areas are covered in this dissertation: elemental analysis of Caborn-Welborn ceramics, elemental analysis and geochemical characterization of ochres, and construction and implementation of a portable XRF instrument ...
Pertechnetate immobilization with sulfide in aqueous media under anaerobic and aerobic environments
(University of Missouri--Columbia, 2007)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Technetium-99 (Tc-99) is a high yield radionuclide produced from thermal neutron fission. As a consequence of the development of nuclear weapons over ...
Strategies for metal colloidal nancrystal synthesis in sustainable media
(University of Missouri--Columbia, 2019)
and functionalities of such nanomaterials. This dissertation reports strategies for metal colloidal nanocrystal synthesis in sustainable media and aims to build a foundation for understanding how to tailor eco-friendly IL and DES fluids to control the growth of metal...
Studies of natural products that reveal novel strategies for efficient modification of DNA
(University of Missouri--Columbia, 2006)
DNA is the central molecule in cells. The correct function of cells depends on the structure of DNA. DNA damaging natural products often show cytotoxic or mutagenic properties, which many times land them medicinal value ...
Characterizing and understanding self-assembling, nanocapsule host-guest systems
(University of Missouri--Columbia, 2010)
to examine the host-guest interactions between the capsule interior and the fluorescent reporter molecule pyrene butanol that became encapsulated in the PgC6 nanocapsule. Solution-state spectroscopic data was compared with solid-state, single-crystal, X...
Measurement of radionuclides in biological tissues from occupationally exposed individuals
(University of Missouri--Columbia, 2022)
Keratinous materials have the potential to be used in criminal investigation of individuals who participate in nuclear smuggling or in the production of clandestine nuclear weapons. To develop the keratin biomonitor, its ...
Radioactive Au for potential radiotherapeutic application
(University of Missouri--Columbia, 2010)
Radioactive gold-198/199 can be used in therapeutic radiopharmaceutical agents to combat cancer. In this thesis, two projects involving the development of radioactive gold-198/199 are described. The first project discusses ...