The Synthesis and Purification Methodology of an Intermolecular Pyrophosphate Sensor: Applications for the Quantitative Polymerase Chain Reaction

The optimized synthesis and purification methodology for an intermolecular pyrophosphate sensor scaffold molecule was performed: high performance liquid chromatography afforded the scaffold in excellent purity and yield. The applications of the sensor assembly in the quantitative polymerase chain reaction were discussed, and preliminary results show tha

Federalism and Homeland Security: Examining Privacy Issues of Personal Devices and Management of Security Policy

https://scholarworks.moreheadstate.edu/student_scholarship_posters/1213/thumbnail.jp

Morgan County - A History of Cannel City & Caney, Kentucky through Newspapers, 1885-1922 (Draft)

A First Draft of History A history of Cannel City & Caney, Kentucky through newspapers 1885-1922 by Ron Gevedon in 2011

Predicting Success In High School Computer Programming

There are great differences in performance among students taking high school programming courses, and instructors debate over what elements contribute to these differences. Some students develop logical thinking abilities and problem solving techniques, while others fail to develop skills beyond memorization of specific terms and procedures. It is not known whether these differences are causally related to the specific educational environment or student backgrounds. Without more information, the factors that actually contribute to the success of high school students in computer programming courses cannot be accurately determined. It was the purpose of this study then to isolate certain student characteristics and background data and determine their relationship to success in the computer programming course

A survey of Sierra Nevada magmatism using Great Valley detrital zircon trace-element geochemistry: View from the forearc

The well-characterized Sierra Nevada magmatic arc offers an unparalleled opportunity to improve our understanding of continental arc magmatism, but present bedrock exposure provides an incomplete record that is dominated by Cretaceous plutons, making it challenging to decipher details of older magmatism and the dynamic interplay between plutonism and volcanism. Moreover, the forearc detrital record includes abundant zircon formed during apparent magmatic lulls, suggesting that understanding the long-term history of arc magmatism requires integrating plutonic, volcanic, and detrital records. We present trace-element geochemistry of detrital zircon grains from the Great Valley forearc basin to survey Sierra Nevadan arc magmatism through Mesozoic time. We analyzed 257 previously dated detrital zircon grains from seven sandstone samples of volcanogenic, arkosic, and mixed compositions deposited ca. 145–80 Ma along the length of the forearc basin. Detrital zircon trace-element geochemistry is largely consistent with continental arc derivation and shows similar geochemical ranges between samples, regardless of location along strike of the forearc basin, depositional age, or sandstone composition. Comparison of zircon trace-element data from the forearc, arc, and retroarc regions revealed geochemical asymmetry across the arc that was persistent through time and demonstrated that forearc and retroarc basins sampled different parts of the arc and therefore recorded different magmatic histories. In addition, we identified a minor group of Jurassic detrital zircon grains with oceanic geochemical signatures that may have provenance in the Coast Range ophiolite. Taken together, these results suggest that the forearc detrital zircon data set reveals information different from that gleaned from the arc itself and that zircon compositions can help to identify and differentiate geochemically distinct parts of continental arc systems. Our results highlight the importance of integrating multiple proxies to fully document arc magmatism, demonstrating that detrital zircon geochemical data can enhance understanding of a well-characterized arc, and these data may prove an effective means by which to survey an arc that is inaccessible and therefore poorly characterized

They Shall Take up Serpants

Thin bald headed man standing on a stage at left with a lectern just right of center. On the right, seated on the floor below the stage are three people. A woman in a red dress has a fan in her left hand while her right hand is raised, palm outstretched and reaching towards the man.https://scholarworks.moreheadstate.edu/kfac_archive/1226/thumbnail.jp

On the timing, fluid sources, and behavior of skarn formation : lessons from oxygen isotopes in skarn garnets of the North American Mesozoic Cordilleran arc

Skarns, the calc-silicate products of fluid-facilitated decarbonation reactions occurring at the interface of carbonate-bearing rocks and igneous bodies, are best studied for the base metals and ore minerals they often host (e.g., Meinert, 2005). Skarn garnets preserve the compositions of fluids present during the initial stages of skarn formation because they form early in the skarn metasomatic paragenetic sequence. Although skarns constitute a volumetrically insignificant proportion of the crust, they represent the seldom preserved crustal-level interactions between plutons and their host rocks and as such preserve information regarding the local and regional conditions prevailing during arc magmatism. Skarn garnet crystalizes early, if not first, during metasomatic skarn-forming reactions and records the oxygen isotope composition of the initial hydrothermal fluids (e.g., Einaudi and Burt, 1982; Brown et al., 1985; Meinert et al., 2005). Therefore, the skarn garnet oxygen isotope record is a powerful proxy for hydrothermal fluid sources and a useful monitor of the relative depth of skarn formation, which may be critical to skarn metal classification and, as we show here, paleogeography and tectonic rifting. This study focuses on three aspects of skarn formation. First, the timing of skarn formation in relation to assumed causative plutons, which also serves as a method for dating the presence of meteoric fluid within the subsurface. Second, an investigation of the various fluid sources that contribute to the fluid budgets in skarn systems spanning the spatial and temporal extent of a long-lived continental margin arc. And third, a detailed investigation of the relative timing of fluid source contributions and fluid flow mechanisms that result in large degrees of isotopic heterogeneity. Through the combined use of U-Pb geochronology and stable isotope geochemistry it is possible to provide radiometric ages to constrain the spatial and temporal extent of regional hydrothermal systems. The presence of meteoric fluids captured by skarn garnet correspond to skarns emplaced during tectono-magmatic regimes with extensional components or with plutons experiencing shallow emplacement. Moreover, use of regional paleogeographic reconstructions, U-Pb geochronology, and the presence of meteoric fluid at depths of skarn formation provides a new proxy for constraint on the location and proximity of the Panthalassan paleo-shoreline in the Jurassic, and provides evidence for the Jurassic Andean-style emergence of the arc edifice many millions of years earlier than previously hypothesized. Data presented here suggests that skarn garnet, in comparison with other mineral records of oxygen isotopes, provides the highest-fidelity proxy for the compositions and sources of metasomatic fluids regardless of age or pressure-temperature conditions subsequent to garnet crystallization.Geological Science