Coastal Carolina University, commonly referred to as CCU or Coastal, is a public, state-supported, liberal arts university in Conway, South Carolina, USA, located eight miles west of Myrtle Beach. Founded in 1954, Coastal became an independent university in 1993.The university is a national sea-grant institution and owns part of Waties Island, a 1,105-acre barrier island which serves as a natural laboratory. Coastal Carolina is also the home of the Horry County Schools Scholars Academy, a high school for gifted students. Wikipedia.
Moore J.C.,Coastal Carolina University
Sensors (Basel, Switzerland) | Year: 2013
We present a phenomenological model for the photocurrent transient relaxation observed in ZnO-based metal-semiconductor-metal (MSM) planar photodetector devices based on time-resolved surface band bending. Surface band bending decreases during illumination, due to migration of photogenerated holes to the surface. Immediately after turning off illumination, conduction-band electrons must overcome a relatively low energy barrier to recombine with photogenerated holes at the surface; however, with increasing time, the adsorption of oxygen at the surface or electron trapping in the depletion region increases band bending, resulting in an increased bulk/surface energy barrier that slows the transport of photogenerated electrons. We present a complex rate equation based on thermionic transition of charge carriers to and from the surface and numerically fit this model to transient photocurrent measurements of several MSM planar ZnO photodetectors at variable temperature. Fitting parameters are found to be consistent with measured values in the literature. An understanding of the mechanism for persistent photoconductivity could lead to mitigation in future device applications. Source
Van Hoewyk D.,Coastal Carolina University
Annals of Botany | Year: 2013
Background Despite selenium's toxicity in plants at higher levels, crops supply most of the essential dietary selenium in humans. In plants, inorganic selenium can be assimilated into selenocysteine, which can replace cysteine in proteins. Selenium toxicity in plants has been attributed to the formation of non-specific selenoproteins. However, this paradigm can be challenged now that there is increasingly abundant evidence suggesting that selenium-induced oxidative stress also contributes to toxicity in plants. Scope This Botanical Briefing summarizes the evidence indicating that selenium toxicity in plants is attributable to both the accumulation of non-specific selenoproteins and selenium-induced oxidative stress. Evidence is also presented to substantiate the claim that inadvertent selenocysteine replacement probably impairs or misfolds proteins, which supports the malformed selenoprotein hypothesis. The possible physiological ramifications of selenoproteins and selenium-induced oxidative stress are discussed. Conclusions Malformed selenoproteins and oxidative stress are two distinct types of stress that drive selenium toxicity in plants and could impact cellular processes in plants that have yet to be thoroughly explored. Although challenging, deciphering whether the extent of selenium toxicity in plants is imparted by selenoproteins or oxidative stress could be helpful in the development of crops with fortified levels of selenium. © 2013 The Author. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. Source
Ritter B.A.,Coastal Carolina University
Journal of Computer-Mediated Communication | Year: 2014
The use of computer-mediated communication continues to increase dramatically in organizations, bringing with it new avenues for sexual harassment. Despite the recognition that cybersexual harassment is an important phenomenon and that the online behaviors of employees can adversely affect the organization, there is little research on the development of instruments to measure related constructs. In the present study, scales are created to measure perceptions of the online environment that are thought to precipitate the occurrence of harassment and intentions to engage in sexually harassing behavior. It is found that perceptions of the online environment as stimulating (where risk taking is exhilarating), and as an environment in which blatant prejudice is acceptable, are related to multiple forms of cybersexual harassment. © 2013 International Communication Association. Source
Moskovitz C.,Duke University |
Kellogg D.,Coastal Carolina University |
Kellogg D.,National University of Singapore
Science | Year: 2011
Writing lab reports in science classes can be more productive and engaging if the experience is structured well. Source
Agency: NSF | Branch: Standard Grant | Program: | Phase: Cellular Dynamics and Function | Award Amount: 135.85K | Year: 2013
Animals (including humans) require selenium to make the amino acid selenocysteine, which is used in the synthesis of essential selenoproteins. In contrast, plants do not require selenium or make specific selenoproteins. Nonetheless, plants can accumulate selenium and play a vital role in providing most of the dietary selenium consumed by humans. However, an excess of selenium leads to toxicity in plants when selenocysteine is incorporated into proteins. Selenoproteins in plants are likely misfolded, and are therefore removed by the ubiquitin-proteasome pathway. The goal of this project is to understand the role of the proteasome and glutathione in removing selenoproteins and alleviating their toxicity in plants.
Broader Impacts. The project will directly allow the training of ten undergraduate students, including students with disabilities, at Coastal Carolina University. This project will also facilitate the development of an upper-level laboratory-based class Plant Adaptations to Stress which will integrate this research with teaching.