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2014

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Developing Critical Loads And Dynamic Critical Loads For Acidification For Watersheds In The Adirondack Region Of New York And Great Smoky Mountain National Park (Grsm), Qingtao Zhou Dec 2014

Developing Critical Loads And Dynamic Critical Loads For Acidification For Watersheds In The Adirondack Region Of New York And Great Smoky Mountain National Park (Grsm), Qingtao Zhou

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Critical loads (CLs) and dynamic critical loads (DCLs) are important tools for the management of ecosystems that are impacted by high sulfate, nitrate and ammonium deposition. In this study, a biogeochemical model (PnET-BGC) was applied to 20 watersheds in the Adirondack region and 12 watersheds in Great Smoky Mountain National Park (GRSM) to calculate CLs and DCLs. I evaluated ecosystem changes in response to historical and potential future changes in acidic deposition. I analyzed factors affecting CLs and DCLs for acidification in the acid impacted Constable Pond Watershed in the Adirondack region, specifically evaluating trade-offs of sulfate and nitrate deposition, …

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The Influence Of Biogenic Opal On 231pa/230th In Sediments From The Bermuda Rise And Its Implication For Paleocirculation Reconstructions, Theresa Marie King Dec 2014

The Influence Of Biogenic Opal On 231pa/230th In Sediments From The Bermuda Rise And Its Implication For Paleocirculation Reconstructions, Theresa Marie King

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Thermohaline circulation is responsible for the global transport of heat in surface waters of the ocean, and variability in this circulation has been linked to both short- and long-term climate change on time scales ranging from centuries to tens of thousands of years. Accurate reconstructions of past variability are thus critical to understanding modern and future thermohaline circulation changes and the response of the global climate system. The main circulation feature in the Atlantic is Atlantic Meridional Overturning Circulation (AMOC), and has been reconstructed using a variety of static proxies, but more recently through the use of sedimentary 231Paxs …

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The Effect Of Patch Dynamics And Nutrient Availability On The Production Of Zostera Marina Seeds Within Shinnecock Bay, Ny, Lisa Jackson Dec 2014

The Effect Of Patch Dynamics And Nutrient Availability On The Production Of Zostera Marina Seeds Within Shinnecock Bay, Ny, Lisa Jackson

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Exposing Zostera marina to fertilized porewater has been shown to increase vegetative shoot density and leaf growth rates, as well as affect morphological shoot characteristics including increasing leaf length, leaf area and the number of leaves per shoot. However, aside from changes in shoot density, records of morphological changes in reproductive shoots subjected to increased nutrient availability are lacking. To address this, five replicate ambient and nutrient enriched patches, each between 0.5 and 2.0 m2, were selected within a developing Z. marina meadow in Shinnecock Bay, NY. Fertilizer stakes, with a N:P:K of 15:3:3, were used to amend enriched patches …

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A Greedy Method To Simulate Drainage In Cross Sections, Long Li Dec 2014

A Greedy Method To Simulate Drainage In Cross Sections, Long Li

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Porous media, such as rocks and soil, make up the largest proportion of mass in nature. Pore-network model is a widely used model to describe the tiny and complicated inner structure of porous media. Assisted by the development of X-ray computed microtomography in recent years, researchers are able to extract the geometric characters of inner pores and throats from porous media, then further explore two-phase flow in porous media more exactly. Drainage, a process that a non-wetting phase fluid replaces the other wetting fluid, is the research topic of this thesis. The boundaries between two different phases, named as menisci …

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Nitrogen Loading To The South Shore, Eastern Bays, Ny: Sources, Impacts, And Management Options, Isabelle Stinnette Dec 2014

Nitrogen Loading To The South Shore, Eastern Bays, Ny: Sources, Impacts, And Management Options, Isabelle Stinnette

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

The excessive delivery of nitrogen from land into coastal waters can lead to a host of environmental problems including algal blooms, hypoxic zones, habitat loss, and acidification. While many of these environmental problems have manifested themselves within Long Island's coastal bays, the quantity and sources of nitrogen are largely unknown in much of this region, making the development of effective management plans to ameliorate these problems exceedingly difficult. This study was designed to quantify nitrogen loads and sources to Moriches, Quantuck and Shinnecock Bays within the eastern extent of Long Island's South Shore Estuary Reserve. Further this study assessed water …

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A Greedy Method To Simulate Drainage In Cross Sections, Long Li Dec 2014

A Greedy Method To Simulate Drainage In Cross Sections, Long Li

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Porous media, such as rocks and soil, make up the largest proportion of mass in nature. Pore-network model is a widely used model to describe the tiny and complicated inner structure of porous media. Assisted by the development of X-ray computed microtomography in recent years, researchers are able to extract the geometric characters of inner pores and throats from porous media, then further explore two-phase flow in porous media more exactly. Drainage, a process that a non-wetting phase fluid replaces the other wetting fluid, is the research topic of this thesis. The boundaries between two different phases, named as menisci …

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Oceanic And Atmospheric Influences On The Interannual Variability Of The Madagascar Phytoplankton Bloom, Lindsay Roupe Dec 2014

Oceanic And Atmospheric Influences On The Interannual Variability Of The Madagascar Phytoplankton Bloom, Lindsay Roupe

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Approximately every other year during the austral summer a larger phytoplankton bloom propagates off of the southeast tip of Madagascar. The cause of the interannual variability of this distinct oceanic feature remains unclear, so here we improve the analysis of the interannual variability of the bloom with a longer ocean color dataset, re-examine the existing mixed layer depth and iron fertilization hypotheses formerly used to explain bloom formation and analyze the variability in the larger ocean-atmosphere system in the region in relation to bloom formation. To resolve the forcings on the bloom, relevant satellite and reanalysis data were examined using …

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The Influence Of Biogenic Opal On 231pa/230th In Sediments From The Bermuda Rise And Its Implication For Paleocirculation Reconstructions, Theresa Marie King Dec 2014

The Influence Of Biogenic Opal On 231pa/230th In Sediments From The Bermuda Rise And Its Implication For Paleocirculation Reconstructions, Theresa Marie King

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Thermohaline circulation is responsible for the global transport of heat in surface waters of the ocean, and variability in this circulation has been linked to both short- and long-term climate change on time scales ranging from centuries to tens of thousands of years. Accurate reconstructions of past variability are thus critical to understanding modern and future thermohaline circulation changes and the response of the global climate system. The main circulation feature in the Atlantic is Atlantic Meridional Overturning Circulation (AMOC), and has been reconstructed using a variety of static proxies, but more recently through the use of sedimentary 231Paxs …

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Diversity Of Skates (Batoidea: Rajoidei) And The Spatial Structure Of Nw Atlantic Communities, Christopher Michael Martinez Dec 2014

Diversity Of Skates (Batoidea: Rajoidei) And The Spatial Structure Of Nw Atlantic Communities, Christopher Michael Martinez

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Trait diversity often underlies complexity observed in biological systems. Whether it is behavior, life history, form or function, variation imparts differential performance on the organism, which may influence processes at higher levels of organization. Using two approaches, my dissertation research concerns the appraisal of diversity in fishes and its consequences for their ecology and evolution. The first two chapters focus on variety of spatial behaviors in northwest Atlantic marine communities. Temporal changes in community habitat utilization, as quantified by the interspecific abundance-occupancy (A-O) relationship, were the focus of chapter one. Trends in the A-O relationship indicated large-scale reorganization in some …

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A Greedy Method To Simulate Drainage In Cross Sections, Long Li Dec 2014

A Greedy Method To Simulate Drainage In Cross Sections, Long Li

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Porous media, such as rocks and soil, make up the largest proportion of mass in nature. Pore-network model is a widely used model to describe the tiny and complicated inner structure of porous media. Assisted by the development of X-ray computed microtomography in recent years, researchers are able to extract the geometric characters of inner pores and throats from porous media, then further explore two-phase flow in porous media more exactly. Drainage, a process that a non-wetting phase fluid replaces the other wetting fluid, is the research topic of this thesis. The boundaries between two different phases, named as menisci …

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Mechanical Properties Of 3-D Printed Cellular Foams With Triangular Cells, Pratap Kumar Bunga Dec 2014

Mechanical Properties Of 3-D Printed Cellular Foams With Triangular Cells, Pratap Kumar Bunga

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

In the present work, poly lactic acid (PLA) is used as a model system to investigate the mechanical behavior of 3-D printed foams with triangular cells. Solid PLA tension and compression specimens and foams made of PLA were fabricated using fused deposition 3-D printing technique. The solid PLA tension specimens were characterized for their densities and found to be about 10% lower in density as compared to their bulk counter parts. The triangular foams had a relative density of about 64%. The relationships between the structure of the foams and its deformation behavior under compression along two in-plane directions were …

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The Effect Of The Pla Degradation Chemicals On Cell Proliferation, Kuan-Che Feng Dec 2014

The Effect Of The Pla Degradation Chemicals On Cell Proliferation, Kuan-Che Feng

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

PLA is a material easy to manufacture. The biodegradability makes it a perfect material for tissue engineering. Several conditions for biodegradability experiments for spin-coating Polylactic acid thin films were tried. Polylactic acid thin films were immersed in different solution for different times. Thickness, morphology and mechanical properties were analyzed after the Polylactic acid thin films immersing test. Dermal fibroblasts were plated on the Polylactic acid thin films, culturing with conditioning medium. Thickness, morphology, mechanical properties and cell count were analyzed after the Polylactic acid thin films cell culture test. | 35 pages

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Investigation Of Biomineralization By Raman Spectroscopy, Robert William Fatscher Dec 2014

Investigation Of Biomineralization By Raman Spectroscopy, Robert William Fatscher

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Biomineralization is a process in which living organism grow composite materials consisting of inorganic and organic materials. This produces a composite material consisting of both inorganic and organic components, with superior mechanical properties. In the human body bone and dentin are both examples of biominerals. In this research Raman spectroscopy was used to characterize dentin from mice and human teeth, to determine composition. In the mouse tooth samples areas of irregular dentin were found, along the inside of the tooth, to be in the process of mineralization. By analyzing the samples along these areas we were able to determine the …

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Rheological Characterization Of Nano Composite Hydrogels, Jack Lombardi Dec 2014

Rheological Characterization Of Nano Composite Hydrogels, Jack Lombardi

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Engineered Polymer hydrogels and hydrogels from Bio macromolecules have visco-elastic properties that can be measured using Oscillatory Shear Rheology. Manipulation and measurement of physical properties in gels including F-127 Pluronic Block Co-Polymer and Poly(N-isopropylacrylamide)-Clay are shown through OSR by addition of salts, clays and glucose at physiological levels. Rheological analysis of f-127 illustrates changes in G' reduction with phase transition temperature. Measurements also indicate physical changes due to the aforementioned additives vary as a function of the gel physical and chemical structure. In particular, non-enzymatic glycation is shown to change the modulus of elasticity in both of the gels tested. …

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Molecular Modeling Of The Interaction Between Chitosan And Silver And Palladium, Wenbo Wang Dec 2014

Molecular Modeling Of The Interaction Between Chitosan And Silver And Palladium, Wenbo Wang

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

The purpose of this research was to study the interaction between chitosan and metal surfaces at the atomic level in order to better understand the mechanism of formation of catalytic noble metal nanoparticle (where chitosan serves as a shaping or encapsulating agent). In this study, Molecular dynamics (MD) simulation was employed to study chitosan adsorption on different Silver and Palladium crystallographic planes at the atomic level. Chitosan were formulated by molecular dynamics simulation named Materials Studio 6.0 using COMPASS force field. By calculated result of the solubility parameter δ , the length of chitosan was chosen 20 repeated units. Through …

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Roles Of Zinc And Iron On Bone Health In A Rat Model Of Osteoporosis, Danhua Yan Dec 2014

Roles Of Zinc And Iron On Bone Health In A Rat Model Of Osteoporosis, Danhua Yan

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Bone is one of the most vital organs in animals, serving as both structural and protective functions. Remodeling of bone is an important indicator of bone health, and disorders in bone remodeling may lead to bone diseases such as osteoporosis. Osteoporosis increases risk of bone fracture and even death, and much more preferable to be happened in postmenopausal women due to great changes in hormones. Micronutrients, such as Zinc (Zn) and Iron (Fe), would as well influence bone health in different manners. That Zn would promote bone health is widely accepted, for the reasons Zn increases osteoblast cell proliferation and …

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Polyaniline And Cellulose Acetate Chemomechanical Actuator And Its Selectivity For Acetone, Jing Zhang Dec 2014

Polyaniline And Cellulose Acetate Chemomechanical Actuator And Its Selectivity For Acetone, Jing Zhang

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Polyaniline (PANI) belongs to the conducting polymers and has been studied for so many years. PANI has three different states depending on the redox process. In this thesis, we used the completely reduced form leucoemeraldine base (LEB) to synthesize the Chemomechanical actuator. Cellulose Acetate (CA) was used to be the matrix because CA can provide a strong mechanical property for the film synthesizing. PANI and CA molecules interconnected and form the Chemomechanical actuator, which has the selectivity for acetone vapor. We tested and recorded the Chemomechanical actuator's bending angle and time, and its unique character for acetone selectivity. Scanning electron …

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Finding Place: The Art Of Wangechi Mutu, Maria Magdalena Campos-Pons And Ingridmwangiroberthutter, Eva Susanne Hericks-Bares Dec 2014

Finding Place: The Art Of Wangechi Mutu, Maria Magdalena Campos-Pons And Ingridmwangiroberthutter, Eva Susanne Hericks-Bares

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

This dissertation examines the issue of " place" in the lives and works of three contemporary women artists of the African Diaspora: Maria Magdalena Campos-Pons, IngridMwangiRobertHutter, and Wangechi Mutu. Place as a location is a core challenge of globalism: though fundamental to our existence, it has ceased to be permanent or definite. However, place is more than location--it is cultural, gendered, historical, interactive, personal and social, among other things--and can only be fully understood in considering several of these different facets. Each of the artists in this dissertation has had to navigate through instances of bias (such as racism and …

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Characterization Of Trifunctional Glycinamide Ribonucleotide Synthetase And Its Role In Purinosome Complex, Iva Chitrakar Dec 2014

Characterization Of Trifunctional Glycinamide Ribonucleotide Synthetase And Its Role In Purinosome Complex, Iva Chitrakar

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

The human de novo purine biosynthetic pathway consists of six proteins, which come together to form a protein complex called the purinosome. The tri-functional enzyme, TGART, which contains three domains, is one of the purinosome proteins. Protein-protein interaction studies have shown that TGART, along with two other de novo purine pathway proteins FGAMS and PPAT, is at the core of purinosome complex. Little is known, however about the interacting surface, stoichiometry or interaction mechanism. In order to understand this, we hope to solve the X-ray crystal structure of full-length human TGART, run quantitative protein interaction measurements on TGART, FGAMS and …

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Cpi-613, A Non-Redox Active Lipoic Acid Analog, Causes Hyper-Phosphorylation Of Bckdc E1Α In H460 Lung Cancer Cells In Vitro, Michael Simon Dahan Dec 2014

Cpi-613, A Non-Redox Active Lipoic Acid Analog, Causes Hyper-Phosphorylation Of Bckdc E1Α In H460 Lung Cancer Cells In Vitro, Michael Simon Dahan

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

The production of lipids and proteins for growth, as well as nucleotides for the replication of the genome, are key requirements that loom as importantly as the need for the production of energy in the transformed metabolic state of cancer cells. The remodeling of the TCA cycle (extensive anaplerosis and cataplerosis) reflects this need for biosynthetic macromolecules. CPI-613, a non-redox active lipoic acid analog that has been shown to selectively increase phosphorylation of the pyruvate dehydrogenase (PDH) E1 α subunit, thereby inactivating the entire complex, was investigated for its role in causing phosphorylation of the branched-chain amino acid dehydrogenase complex …

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Identification Of Binding Partners With The Negatively Charged Zip1 C-Terminus Using A Two-Hybrid Screen, Matthew Murray Dec 2014

Identification Of Binding Partners With The Negatively Charged Zip1 C-Terminus Using A Two-Hybrid Screen, Matthew Murray

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Recombination is an essential meiotic process to ensure proper chromosome distribution. Recombination is promoted by the synaptonemal complex, a structure which bridges two pairs of homologous sister chromatids, bringing them into close proximity. The synaptonemal complex is formed by condensation of the sister chromatids on protein cores called axial elements. Homologous axial elements are then held together in budding yeast by a protein called Zip1. Zip1 is part of the ZMM group of proteins that work together during meiosis to promote the formation of crossovers which are distributed throughout the genome by interference. Four phosphorylation sites have been identified in …

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Expression, Purification, And Characterization Of The Short Isoform Of Adenylosuccinate Lyase, Benjamin Rajan Dec 2014

Expression, Purification, And Characterization Of The Short Isoform Of Adenylosuccinate Lyase, Benjamin Rajan

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Cells require purines for critical biological processes that can be created by the de novo biosynthetic pathway or maintained by the salvage pathways. The de novo pathway in humans requires 6 enzymes, some of which are multifunctional. Adenylosuccinate lyase (ASL) catalyzes step 8 of the de novo pathway converting susuccinylaminoimidazolecarboxamide ribonucleotide (SAICAR) to aminoimidazolecarboxamide ribotide (AICAR). It also catalyzes the second step of the purine nucleotide cycle by converting SAMP to AMP. A short isoform of ASL (sASL) is ubiquitously expressed in all cell types at a lower concentration. This shortened splice variant does not perform catalysis on either of …

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Analysis Of The Oncogenic Cooperation Between Mutp53 And Her2 To Propose Mutp53 As A Biomarker For Her2-Positive Breast Cancer, Amanda Deanna Russo Dec 2014

Analysis Of The Oncogenic Cooperation Between Mutp53 And Her2 To Propose Mutp53 As A Biomarker For Her2-Positive Breast Cancer, Amanda Deanna Russo

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Breast cancer is the second deadliest cancer in the United States and is classified into four main subtypes including HER2-positive breast cancer. There have been a number of HER2-targeted therapeutic treatments that were discovered, but they are expensive and patients frequently exhibit a resistance for these treatments. To alleviate patients undergoing expensive therapy with the possibility of not benefitting from the treatment, it is important to understand the cooperation between HER2 and mutp53, a tumor suppressor gene that is mutated in the majority of breast cancers. Analysis of scientific articles illustrate that HER2 and mutp53 cooperate to promote tumorigenesis via …

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Orbitofrontal Cortex And The Decision-Making Process, Youran Wu Dec 2014

Orbitofrontal Cortex And The Decision-Making Process, Youran Wu

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Orbitofrontal cortex (OFC) is situated at the ventral floor of the prefrontal cortex region. OFC and some of its related structure (ventral striatum, ventral tegmental area, basolateral amygdala) are considered to be part of the valuation system that is essential to the decision-making process. In order to understand the exact role OFC plays in the decision-making process, we sought to find out how decision variables are represented in different OFC projections, and what will happen if OFC projections were disrupted. The first specific aim of this project is to find out whether projections to OFC related structures are originated from …

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The Versatile Applications Of 6-Alkynyl Fucose And Other Fucose Analogs In Studying Protein Fucosylation, Esam Al-Shareffi Dec 2014

The Versatile Applications Of 6-Alkynyl Fucose And Other Fucose Analogs In Studying Protein Fucosylation, Esam Al-Shareffi

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Glycosylation is the modification of a target molecule with carbohydrate. It is a common and complex co- or post-translational protein modification that is responsible for diverse and essential biological roles including cellular communication, modulation of function, and the provision of specific ligands for carbohydrate-binding proteins. Fucosylation is a specific type of glycosylation that results from the transfer of fucose, a unique monosaccharide with the L-configuration, to its target proteins or glycans through the action of fucosyltransferases. Thirteen fucosyltransferases have been identified, including protein O-fucosyltransferases 1 and 2 (POFUT1 and POFUT2), responsible for addition of fucose to the hydroxyl group of …

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Redox Regulation Of Protein Tyrosine Phosphatases In Oncogene-Induced Senescence, Ming Yang Dec 2014

Redox Regulation Of Protein Tyrosine Phosphatases In Oncogene-Induced Senescence, Ming Yang

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Oncogene expression in normal cells can cause an irreversible growth arrest called oncogene-induced senescence (OIS), which serves as a barrier to cancer initiation. Elevated reactive oxygen species (ROS) have been detected in most senescent cells and are thought to play a causal role in OIS. ROS are believed to have a second messenger function in transducing signals, however their molecular role in senescence remains elusive. We hypothesize that PTPs, which are prone to redox regulation, act as specific target of ROS and the redox regulation of PTPs mediates the signaling transduction in oncogene-induced senescence. In our study, we utilized a …

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Development Of A Line-Scanned Dual-Axis Confocal Microscope For Video-Rate Diagnostic Imaging, Danni Wang Dec 2014

Development Of A Line-Scanned Dual-Axis Confocal Microscope For Video-Rate Diagnostic Imaging, Danni Wang

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

The prevalence of oral cancer has been increasing at an alarming rate in recent years. Due to a limited understanding of the cause and progression of this disease, patient prognosis remain poor, and the mortality and morbidity of the disease remain significant. The need to diagnose cancerous regions early is key to patient survival. However, the high cost and invasive nature of standard pathological analysis motivates the search for an alternative real-time imaging technology that provides accurate non-invasive early diagnosis of the disease. The goal of this thesis is to develop a line-scanned dual-axis confocal (LS-DAC) microscope for high-resolution, high-contrast, …

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Transition Metal Borates As Cathode Materials For Rechargeable Batteries, Shou-Hang Bo Dec 2014

Transition Metal Borates As Cathode Materials For Rechargeable Batteries, Shou-Hang Bo

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

High-capacity rechargeable batteries play a central role in a variety of emerging technologies, including mobile electronics, plug-in and hybrid electric vehicles, and grid-scale storage. All of these technologies will greatly benefit from the design and discovery of next-generation cathode materials that can deliver substantially higher energy densities at reduced cost. Transition metal borates are promising cathode candidates for battery applications, since the mass/charge ratio (m/z) of borate group (BO33-) is the lowest among all common polyanion groups. A variety of borate based compounds were therefore explored as potential Li-ion and Mg-ion battery cathodes in this dissertation Comprehensive studies were carried …

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Macrocyclic Hosts For Polymerization Of Diiodobutadiyne, Ce Chen Dec 2014

Macrocyclic Hosts For Polymerization Of Diiodobutadiyne, Ce Chen

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

All-carbon materials have been widely investigated because of their potential thermal, electrical and physical properties. Carbyne, which would have all sp hybridized carbons, has received considerable attention. Polydiiododiacetylene (PIDA), which has a carbon backbone and iodine atom substituents, serves as a potential precursor to carbyne. We propose that carbyne could result from complete deiodination of PIDA in the presence of Lewis bases such as triethyl amine, pyridine and pyrrolidine. To avoid aggregation of PIDA or carbyne strands during this process, we aim to prepare PIDA as a polyrotaxane through topochemical polymerization, using a macrocyclic cocrystallizing agent, or " host" , …

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Metal Complexes For Structural Modeling Of Active Sites Of Metalloenzymes Relevant To Gas Catalysis, Soumya Bhattacharya Dec 2014

Metal Complexes For Structural Modeling Of Active Sites Of Metalloenzymes Relevant To Gas Catalysis, Soumya Bhattacharya

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Sulfur rich metal coordinated active sites is a prominent feature of many metalloenzymes (hydrogenase, nitrogenase, carbon monoxide dehydrogenase) involved in catalytically producing and/or absorbing helpful and/or toxic gases. As the mechanism of gas production and/or absorption heavily depends on the structural intricacies, biomimetic modelling of the active sites is of paramount importance to understand the structure-function relationship. It has been established that the small molecule models with steric bulk of the thiols at the ortho- position of derivatized benzenethiols can provide the stability. Millar and Koch were pioneers in introducing a series of ortho-steric benzene thiols and achieving stabilization of …

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