Large quantities of the chemical oil dispersant Corexit were applied in the Gulf of Mexico (Gulf) in response to the Deepwater Horizon oil spill. Large data gaps regarding the potential transport, persistence and impact of Corexit in the Gulf existed at the time of the emergency response. Analytical methods for...
The purpose of this investigation was to compare the effectiveness of integrated and segregated settings in elementary physical education. The efficacy of each setting was measured by the quantity of opportunities to respond (OTR) and the quality of those responses. This study examined the frequency and motor appropriateness of OTRs...
A short history is given of cathode-ray tubes, from the
earliest laboratory tubes available during the early 1900's through
present day high performance tubes. Special attention is paid to
the development of post-deflection acceleration types especially
band-type PDA tubes and an improvement on that type known as the
helix-type PDA...
Many trace elements (e.g., Zn, Cd, Mo) are essential phytoplankton micronutrients, making them crucial to the marine ecosystem and ultimately the carbon cycle. Because of this association trace metals are also utilized in paleoceanographic studies (e.g., Mo, Cd). However, not much is known about what controls the cycling of these...
Scholars are ushering autobiographical writing of all kinds into the world of literary and scholarly writing: in course titles and syllabi, in academic journals and on bookshelves, autobiographical writing is flourishing. People's real stories offer insights into how people really live and view this life. They offer perspectives which necessarily...
Research and public concern of poly and perfluoroalkyl substances (PFASs) as environmental contaminants has increased significantly due to the increasing number of reports of their detection in humans and wildlife. PFASs have a number of commercial applications including surfactants, coatings, polymers, and levelers, which are used on consumer products like...
Aqueous film forming foams (AFFFs) are proprietary mixtures containing hydrocarbon surfactants and per-and polyfluoroalkyl substances (PFASs) that are used to extinguish hydrocarbon-based fuel fires. There is limited information on hydrocarbon surfactants in AFFFs and AFFF-contaminated groundwater even though they are more abundant (5-10% w/w) than PFASs (0.9-1.5% w /w) in...
Marine heat waves are forecasted to increase in frequency and intensity under future climate scenarios, but little is known about the impact of these events on the one of the most commonly used proxies of ocean temperature - foraminiferal assemblages. This research explores the planktic foraminifera community along the Newport...
There is growing interest in using nutrient manipulations to control invasive
plants such as Brornus lectorurn L. (cheatgrass). Both labile (sucrose) and recalcitrant
(straw and sawdust) carbon sources are added to the soil surface to reduce plant
available soil N via soil microbial immobilization. However, the application rates
used in...
Public attention and concern about per- and polyfluoroalkyl substances (PFASs) are increasing due to detection of PFASs in drinking water supplies, the environment, including remote locations, and wildlife and to the lowering of the federal health advisory levels of perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) in drinking water. Aqueous film-forming...