Degradation Of Halogenated Aliphatic Compounds In Sequential Anaerobic

The objective of this study was to utilize an alternating anaerobic/aerobic sequence to biologically transform perchloroethylene to non-hazardous end products such as ethylene, CO2 and H2 using a single microbial consortia in a methanogenic and/or a homoacetogenic environment followed by a aerobic methanotrophic environment. Reductive dechlorination of PCE and TCE to cDCE and VC in an anaerobic environment is typically carried out by methanogens, sulfidogens, or homoacetogens but often (e.g. in-situ) leads to an accumulation of daughter compounds (cDCE, VC) which are more toxic than their parent compounds (PCE, TCE). Furthermore, PCE is resistant to degradation in aerobic environments while VC and cDCE are readily oxidized co-metabolically by aerobic methanotrophic bacteria, among others. In order to achieve complete mineralization of chlorinated solvents using a biotic system, an anaerobic/aerobic treatment strategy was investigated. This strategy has been accomplished successfully at a lab scale with anaerobic and aerobic reactors in series, and in-situ anaerobic zones with downgradient aerobic zones have been proposed in the field. In contrast, the focus of this research was to expose single mixed microbial consortia to sequential anaerobic/aerobic treatments in order to determine if reductive dechlorination could be sustained following aerobic phases of treatment. If possible this would imply that the anaerobic and aerobic zones (in-situ) or reactors (ex-situ) would not necessarily have to be spatially separated. In pure or dilute cultures where soil material is not present strict anaerobes would typically not resume metabolic activity if exposed to frequent aerobic phases of treatment. However in aquifer material or reactors with large floc/granules it might be possible due to the protection of anaerobic micro-environments as a result of diffusion limitations. Microcosms contained in sealed 120-mL serum bottles were used to generate experimental data including autoclaved abiotic controls with mercuric chloride. Inocula for these microcosms come from a several sources, including anaerobic digester sludge, soils, and contaminated aquifers. Once an experimental microcosm showed signs of reductive dechlorination, an aerobic treatment was implemented. The anaerobic phase of the microcosm was interrupted with a short duration aerobic phase. Headspace air or hydrogen peroxide addition was used to supply oxygen. Analytical data from the experiments indicated that anaerobic reductive dechlorination was readily accomplished during anaerobic phase experiments as PCE was sequentially dechlorinated to TCE and then to cDCE as reported in previous research reported by others in the literature. Additionally, a few mixed consortia microcosms showed evidence of further reductive dechlorination to VC and ethylene. During the sequential environment experiments, analytical data also indicated that reductive dechlorination also resumed after an aerobic sequence utilizing hydrogen peroxide as an oxidizer in the microcosm. No conclusive evidence was observed to indicate that aerobic degradation of cDCE during any of the aerobic phase treatments. This was probably due to the inocula not containing methanotrophs

Optimal strategy in the game show, 1 vs. 100

In this paper, we will be using a simplified method (a geometric distribution statistical approach) and move through a more detailed approach (using dynamic programming) to analyze when contestants should quit versus when they should stay in the TV game show “1 vs. 100.” We will observe optimal contestants’ strategies for when they should statistically quit answering questions or stay for the highest probability of a contestant win and the greatest possible expected amount of money to walk away with

WebbWorks Fatigue Testing Device

WebbWorks has requested the design and fabrication of a pedaling fatigue testing device for bicycle frames. The testing device must meet the standard for testing methods outlined in EN 14764. This will help lower costs of frame development for WebbWorks, as well as reduce down time. This project is to be completed by May 2017

WebbWorks Fatigue Testing Device

WebbWorks has requested the design and fabrication of a pedaling fatigue testing device for bicycle frames. The testing device must meet the standard for testing methods outlined in EN 14764. This will help lower costs of frame development for WebbWorks, as well as reduce down time. This project is to be completed by May 2017

Tour(ist)ing Post-Apartheid South African Theatre: The Works of Brett Bailey, Yael Farber, and Mpumelelo Paul Grootboom in (Inter)National Production

After the fall of apartheid in 1994, South Africa and its theatre-makers faced a pressing question: what now? This thesis investigates how three South African dramatists negotiated the exigencies of theatre production in post-apartheid South Africa. Brett Bailey, Yael Farber, and Mpumelelo Paul Grootboom developed idiosyncratic theatrical forms experimenting with notions of “authentic” South African identity, both theatrically and culturally. Through inventive theatrical recombinations, all three dramatists formed canons around particular South African performance traditions and cultural sources. The first half of this thesis analyzes the negotiations of these new, divergent forms as “authentic” (re)presentations of South Africa as a whole. The latter half of this thesis scopes out to interrogate the effects of such authorizing structures on an international scale. Deploying theories of tourism and museum cultures from John Urry, Barbara Kirshenblatt-Gimblett, and others, this thesis asserts that international theatre festivals create “museums of plays” for global spectators. These festivals privilege particular forms of theatre, namely the “Hegemonic Intercultural Theatre” defined by Daphne P. Lei, which typically constructs syncretic “intercultural” works by adding “cultural” (i.e. non-Western) elements to Western stories and structures. Like tourism and museum cultures, the international theatre market places great value on “authentic” cultural objects, creating an exchange market for variably different cultural products. The impacts of these systems on post-apartheid South African theatre are multiple. Notably, between 2003 and 2008, all three dramatists premiered new works that directly reimagined European source material (MoLoRa, Orfeus, and Foreplay). Such appropriation of “Western” cultural material raises important questions concerning the long-term trajectory of South African theatre. Namely, lacking dedicated funding domestically, South African theatre-makers have often found larger audiences and profits from touring their works to international theatre festivals, primarily those located in Europe. With both textual sources and productions tending towards Euroamerican spectators, South African theatre faces the threat of becoming “South African” product shaped primarily by international beliefs of and demands for “South Africa.” Thus, the international traffic and travel of South African theatre over the past two decades begs the very question of South African theatre’s putative “South Africanness.

The Gallery 2010

This is a digital copy of the print book produced by the Gallery 2010 team. Contents: p. 1 Life Around Westby, p. 9 Graphic Design, p. 19 Illustration, p. 27 Jewelry, p. 37 Painting, p. 45 Photography, p. 57 Printmaking, p. 67 Three-Dimensional, p. 77 Rowan Gallery Openings. A Compact Disc (CD) included with the print book is not included here. Files for individual sections may be viewed on the detailed metadata page by clicking on the book title.https://rdw.rowan.edu/the_gallery/1006/thumbnail.jp