Physical Sciences and Mathematics Commons^™

Well Log And Core-Derived Reservoir Properties Of Barnett Shale Of Fort Worth Basin, Melanie Dawn Ybarra

Earth & Environmental Sciences Theses

Wireline tools and log analysis methods were not designed for unconventional reservoirs. As a result, hydrocarbon assessment for shale source rock plays have significant uncertainties. This study focuses on petrophysical interpretation uncertainty from a single historic Barnett Shale well TP Sims #2 of Wise County, TX. The Barnett Shale is one of the major source rock plays in the United States. The large body of research and information from the well-drilled Barnett Shale provides a good opportunity to understand and adjust OGIP modeling approaches from volumetric analysis to well performance data. Several factors unique to shale source rocks such as …

A Tectonic Reconstruction Of Accreted Terranes Along The Paleo-Pacific Margin Of Gondwana, Brandon Bammel

Earth & Environmental Sciences Theses

The southern oceanic margin of Gondwana was nearly 40,000 km long or 24,854.8 miles. The southern margin was the result of the Terra Australis orogen. Spanning 18,000 km or 11,184.7 miles and is proposed as one of the largest and longest lived orogens in Earth history. The paleo-Pacific margin of Gondwana consisted of segments of the Australian-Antarctic craton, southern South America (modern Argentina and Chile), southern South Africa, Marie Byrdland, New Zealand and its adjacent continental shelf, the Ellsworth Mountains, and the Transantarctic Mountains. The process of terrane accretion has played a substantial part in the assembly of the continents …

Geochemical Analysis Of The Woodford Shale, Anadarko Basin, Oklahoma, Karen Mccreight

Earth & Environmental Sciences Theses

The Woodford Shale is a dark, siliceous mudstone that was deposited in a rift basin during late Devonian to early Mississippian times. Three drill cores containing the Woodford Shale from the Anadarko Basin, Oklahoma, have been geochemically analyzed using a handheld energy-dispersive x-ray fluorescence instrument. Each core was analyzed at 3- to 4- inch intervals, providing high-resolution chemostratigraphy. Analysis of the following elemental concentrations was performed: Mg, Al, S, Si, P, K, Ti, Ca, Mn, Fe, Mo, Cr, Ni, Cu, Zn, Th, Rb, U, Sr, Zr, and V. Major element geochemistry supports that the Woodford is a siliceous mudstone, with …

The Subsidence Evolution Of The Fort Worth Basin In North Central Texas, U.S.A., Ohood Bader Al Salem

Earth & Environmental Sciences Theses

Although the Fort Worth Basin in north-central Texas has become a major shale-gas production system in recent years, its subsidence history and dynamic relationship to the Ouachita fold-and-thrust belt have not been well understood. Here I study the sedimentation patterns, model the basin subsidence and thermal maturation histories to understand the evolution of the Fort Worth Basin. Depositional patterns show that the tectonic loading of both the Muenster Arch and the Ouachita fold-and-thrust belt influenced the subsidence of the basin as early as the middle-late Mississippian. Rapid subsidence of the basin initiated in the earliest Pennsylvanian in response to the …

Depositional Facies And Reservoir Analysis Of The Tyler Formation In The Central Williston Basin, North Dakota, Paul David Monahan

Earth & Environmental Sciences Theses

Traditionally, the Pennsylvanian Tyler Formation has been targeted as a conventional reservoir consisting of barrier island and channel sand deposits in the southwestern Williston basin, North Dakota. The purpose of this study is to investigate the cyclothemic stacking patterns in the Tyler Formation near the depocenter of the basin to improve the petroleum system model. Utilizing one core located in central McKenzie County, the litho-stratigraphy of the cyclothems is characterized. Six facies were identified and described in each cyclothem. A network of six structural and stratigraphic cross sections was constructed. Structural cross sections and structural maps illustrate that the Tyler …

Chemostratigraphy Of The Austin Chalk And Upper Eagle Ford Shale, Zain Abdi

Earth & Environmental Sciences Theses

A single drill core from La Salle, TX was analyzed for its chemical composition and percent concentration of both major and trace elements in order to understand depositional environments and local tectonic activity of the Balcones Fault Zone. The drill core contained the entirety of the Austin Chalk and the upper portion of the Upper Eagle Ford Shale. Samples were taken from 47 boxes at 3 inch intervals which accumulated in a total of 1,680 samples. Each sample was analyzed using a handheld x-ray fluorescence instrument which provided quantitative analysis of the following elements: Al, Ca, Cr, Cu, Fe, K, …

Foraminifers Of The Clarita Formation (Wenlock, Silurian), From The Arbuckle Mountains, Oklahoma, Melinda Parker

Earth & Environmental Sciences Theses

The study, identification, and classification of Silurian foraminifers from the Arbuckle Mountains in Oklahoma have attracted little attention since the work of Moreman and Ireland in late 1930's. These authors described 48 new species and several new genera, some of which are synonyms in recent taxonomy. Besides foraminifers, diverse shelly faunas have been described from Silurian strata in the Arbuckle Mountain region, especially brachiopods, trilobites, and conodonts, as well as corals, bryozoans, and rare graptolites. Rich assemblages of foraminifers occur in the Fitzhugh Member of the Clarita Formation of the Hunton Group, in association with abundant and diverse conodont faunas. …

Synthetic Strategies To Probe Enzymatic Activity: Investigation Of A Novel Oxygen-Dependent Non-Heme Diiron Monooxygenase (Miae), Andra Lynn Corder

Chemistry & Biochemistry Dissertations

Within the anticodon stem loop (ACSL) of tRNA, nucleoside modifications are frequently observed at position 34 (the wobble position) or position 37 (3' adjacent to the anticodon). For instance, nearly all eukaryotic and bacterial tRNAs that read codons starting with uridine are modified by the enzymes MiaA and MiaB. While absent in eukaryotes, some facultative bacteria utilize a non-heme diiron enzyme (MiaE) to catalyze the O2₂-dependent hydroxylation of 2-thiomethyl-N₆-(3-methyl-2-butenylamino) adenosine (ms²i⁶A₃₇) to produce 2-methylthio-N⁶-(4-hydroxyisopentenyl)-adenosine (ms²io⁶A₃₇). In these bacteria, it has been postulated that the extent of the A37-hydroxylation is involved in regulating aromatic amino acid uptake, iron transport, and aerobiosis. …

New Methods For Trace Analysis Of Iodine And Perchlorate In Biological Fluids, Charles Phillip Shelor

Chemistry & Biochemistry Dissertations

Iodine is an essential element necessary for the production of the thyroid hormones T3 and T4. These hormones are necessary for metabolism and are especially important for brain development in infants and young children. Iodine is transported into the thyroid by the sodium iodide symporter. Perchlorate is known to inhibit iodine uptake into the thyroid by binding to the sodium iodide symporter, thus acting as a potential neurotoxicant for developing children.The research in this dissertation consists of two goals. The primary is the development of novel methods for measuring iodine and perchlorate and the second is performing analyses to determine …

Supporting Traditional Instructional Methods With A Constructivist Approach To Learning: Promoting Conceptual Change And Understanding Of Stoichiometry Using E-Learning Tools, Kenneth Munoz Abayan

Chemistry & Biochemistry Dissertations

Stoichiometry is a fundamental topic in chemistry that measures a quantifiable relationship between atoms, molecules, etc. Stoichiometry is usually taught using expository teaching methods. Students are passively given information, in the hopes they will retain the transmission of information to be able to solve stoichiometry problems masterfully. Cognitive science research has shown that this kind of instructional teaching method is not very effecting in meaningful learning practice. Instead, students must take ownership of their learning. The students need to actively construct their own knowledge by receiving, interpreting, integrating and reorganizing that information into their own mental schemas. In the absence …

Development Of Paired Ion Electrospray Ionization Mass Spectrometry For Ultrasensitive Detection Of Anions, Chengdong Xu

Chemistry & Biochemistry Dissertations

Mass spectrometry (MS) has emerged as an essential analytical technique over the last several decades. It is a widely applicable and powerful tool for determination and identification of different types of molecules. Electrospray ionization (ESI) is one of the most commonly used ionization sources for mass spectrometry. ESI-MS has advantages for the analysis of both small molecules and macromolecules due to its outstanding sensitivity, specificity, speed, and the capability for analyte structure elucidation. Currently, one challenging aspect in ESI-MS is the qualitative and quantitative determination of anionic species. This is due to the inherently poor detection sensitivity in the negative …

Mechanistic Study Of Cysteine Dioxygenase, A Non-Heme Mononuclear Iron Enzyme, Wei Li

Chemistry & Biochemistry Dissertations

Cysteine dioxygenase (CDO) is an non-heme mononuclear iron enzymes that catalyzes the O2-dependent oxidation of L-cysteine (Cys) to produce cysteine sulfinic acid (CSA). CDO controls cysteine levels in cells and is a potential drug target for some diseases such as Parkinson's and Alzhermer's. Several crystal structures of CDO have been determined and they reveal a ferrous iron active site coordinated by three histidine residues. This feature is divergent from the monoanionic 2-histidine-1-carboxylate coordination typically observed within the non-heme mononuclear iron super family of oxidase/oxygenase enzymes. Furthermore, within 3.3 Å of the CDO active site iron is an unusual covalently crosslinked …

Determination Of Nicotine And Its Metabolites Accumulated In Fish Tissue Using Quechers And Hydrophilic Interaction Liquid Chromatography And Tandem Mass Spectrometry, Yun-Wei Chang

Chemistry & Biochemistry Theses

The quantitative determination of nicotine and its major metabolites (cotinine and anabasine) in fish tissue was performed using hydrophilic interaction liquid chromatography (HILIC) coupled with tandem mass spectrometry. Marine and freshwater fish were purchased from local grocery stores and were prepared based on the well-known QuEChERS (quick, easy, cheap, effective, rugged, safe) sample preparation protocol. There were significant suppressions on measured nicotine signals (10%) due to the matrix effects from marine fish, but no obvious effects on freshwater fish signals. Method validation was incorporated with internal standards and carried out with matrix-matched calibration. The detection limits for nicotine, cotinine, and …

Development, Characterization And Application Of Chiral Stationary Phases, Muhammad Abdul Momin Khan

Chemistry & Biochemistry Theses

Cyclofructans are cyclic oligosaccharides consisting of a crown ether core with pendent fructofuranose units. These unique macrocycles were reported recently to be powerful chiral selectors. Native cyclofructans show little enantioselectivity. However, when they are derivatized and bonded to silica, they make excellent chiral selectors for HPLC. In this study, several new derivatives of cyclofructan 6 were prepared by introducing aromatic selectors with electron-withdrawing chloro and nitro group(s) and electron-donating methyl group. Their enantioselectivities were evaluated in the normal phase mode in comparison to the commercially available cyclofructan columns (LARIHC CF6-P, LARIHC CF6-RN and LARIHC CF7-DMP). In several cases, the new …

Cmsvega: A Content Management System For The Layman, Roshan P.J. Nedumpurath

Theses and Dissertations

Content management systems are becoming increasingly convoluted to use. Existing website creation systems require users without programming knowledge to scour documentation. A CMS should be intuitive, something a user can pick up and use right away. Simplicity is key when targeting layman users who have no web development knowledge. This project aims to create a simple and intuitive content management system, CMSVega, which users can pick up and use with minimal web development knowledge. A blind study was conducted to compare CMSVega against popular Wordpress, Drupal and Joomla systems. After having recreated a webpage using each CMS, participants were asked …

Benthic And Pelagic Pathways Of Methylmercury Bioaccumulation In Estuarine Food Webs Of The Northeast United States, Celia Y. Chen, Mark E. Borsuk, Deenie M. Bugge, Terill Hollweg

Dartmouth Scholarship

Methylmercury (MeHg) is a contaminant of global concern that bioaccumulates and bioamagnifies in marine food webs. Lower trophic level fauna are important conduits of MeHg from sediment and water to estuarine and coastal fish harvested for human consumption. However, the sources and pathways of MeHg to these coastal fisheries are poorly known particularly the potential for transfer of MeHg from the sediment to biotic compartments. Across a broad gradient of human land impacts, we analyzed MeHg concentrations in food webs at ten estuarine sites in the Northeast US (from the Hackensack Meadowlands, NJ to the Gulf of Maine). MeHg concentrations …

ทำไมส้มบางมดถึง (เกือบ) หายไป, วาสนา มานิช

Thai Environment

No abstract provided.

หายนะสภาพแวดล้อมชายฝั่งทะเลไทยจากการกัดเซาะ : กรณีศึกษาจากจังหวัดนครศรีธรรมราช, นพรัตน์ เศรษฐกุล

Thai Environment

No abstract provided.

สาหร่าย : แหล่งพลังงานยั่งยืนแห่งอนาคต, ธีรพล คังคะเกตุ

Thai Environment

No abstract provided.

การบำบัดสิ่งปฏิกูลตามแนวทางโครงการพระราชดำริ : กรณีตัวอย่างเทศบาลนครนนทบุรี, เพิ่มพงษ์ พุ่มวิเศษ

Thai Environment

No abstract provided.

ผลกระทบของปรากฎการณ์โลกร้อนต่อการเปลี่ยนแปลงระบบนิเวศแหล่งน้ำจืด, รัฐชา ชัยชนะ

Thai Environment

No abstract provided.

การบริหารจัดการสิ่งแวดล้อมเหมืองแร่, อนุ กัลลประวิทย์

Thai Environment

No abstract provided.

พื้นที่ชุ่มน้ำกับการท่องเที่ยว, ภัทราภรณ์ โสมนัส

Thai Environment

No abstract provided.

โครงการสำรวจการกระจายตัวและแหล่งที่มาของการปนเปื้อนโลหะหนักในเขตพื้นที่แหล่งแร่ทองคำภูทับฟ้า ตำบลเขาหลวง อำเภอวังสะพุง จังหวัดเลย : ส่วนที่ 1 มลสารในดิน, อรุบล โชติพงศ์, จักรพันธ์ สุทธิรัตน์, อนุ กัลลประวิทย์

Thai Environment

No abstract provided.

ขยะล้นเมือง - เรื่องจริงหรือแค่ชวนเชื่อ, วรวุฒิ ประสิทธิ์วุฒิศักดิ์, สุภา ศิรินาม, นนทพัทธ์ สื่อเสรีธรรม, สุมาลี ไชยณุกูล, ฉัตรทิพย์ พรหมหมวก, ศรัญญา มงคลสิทธิ์, ธัญศิภรณ์ จันทร์หอม, ประเสริฐ ภวสันต์

Thai Environment

No abstract provided.

กิจกรรมสิ่งแวดล้อม

Thai Environment

No abstract provided.

Hiv Testing Implementation In Two Urban Cities: Practice, Policy, And Perceived Barriers., Camden J Hallmark, Jennifer Skillicorn, Thomas P Giordano, Jessica A Davila, Marlene Mcneese, Nestor Rocha, Avemaria Smith, Stacey Cooper, Amanda D. Castel

Epidemiology Faculty Publications

BACKGROUND: Although funding has supported the scale up of routine, opt-out HIV testing in the US, variance in implementation mechanisms and barriers in high-burden jurisdictions remains unknown.

METHODS: We conducted a survey of health care organizations in Washington, DC and Houston/Harris County to determine number of HIV tests completed in 2011, policy and practices associated with HIV testing, funding mechanisms, and reported barriers to testing in each jurisdiction and to compare results between jurisdictions.

RESULTS: In 2012, 43 Houston and 35 DC HIV-testing organizations participated in the survey. Participants represented 85% of Department of Health-supported testers in DC and 90% …

Repeated Load Relaxation Testing Of Pure Polycrystalline Nickel At Room Temperature Using Nanoindentation, D. E. Stegall, M. A. Mamun, B. Crawford, A, A. Elmustafa

Mechanical & Aerospace Engineering Faculty Publications

We present the results of repeated relaxation tests using nanoindentation to derive the activation volume of the dislocation velocity and the ratios of the dislocation density and dislocation velocity. An experimental technique, based on classical uniaxial relaxation experiments, was developed to establish a constant strain during repeated load relaxation transients and then to calculate the stiffness of unloading, and therefore the hardness, across the transients with acceptable results. We found that the activation volume of the dislocation velocity from our nanoindentation methodology was in good agreement when compared to the same reported for uniaxial experiments. © 2014 AIP Publishing LLC.

Simultaneous Optimization Of The Cavity Heat Load And Trip Rates In Linacs Using A Genetic Algorithm, Balša Terzić, Alicia S. Hofler, Cody J. Reeves, Sabbir A. Khan, Geoffrey A. Krafft, Jay Benesch, Arne Freyberger, Desh Ranjan

Physics Faculty Publications

In this paper, a genetic algorithm-based optimization is used to simultaneously minimize two competing objectives guiding the operation of the Jefferson Lab's Continuous Electron Beam Accelerator Facility linacs: cavity heat load and radio frequency cavity trip rates. The results represent a significant improvement to the standard linac energy management tool and thereby could lead to a more efficient Continuous Electron Beam Accelerator Facility configuration. This study also serves as a proof of principle of how a genetic algorithm can be used for optimizing other linac-based machines.

Plasma Processing Of Large Curved Surfaces For Superconducting Rf Cavity Modification, J. Upadhyay, Do Im, S. Popovic, A. M. Valente-Feliciano, L. Phillips, L. Vušković

Physics Faculty Publications

Plasma-based surface modification of niobium is a promising alternative to wet etching of superconducting radio frequency (SRF) cavities. We have demonstrated surface layer removal in an asymmetric nonplanar geometry, using a simple cylindrical cavity. The etching rate is highly correlated with the shape of the inner electrode, radio-frequency (rf) circuit elements, gas pressure, rf power, chlorine concentration in the Cl₂/Ar gas mixtures, residence time of reactive species, and temperature of the cavity. Using variable radius cylindrical electrodes, large-surface ring-shaped samples, and dc bias in the external circuit, we have measured substantial average etching rates and outlined the possibility …