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Lookout Mountain, GA, United States

Covenant College is a Christian liberal arts college in Lookout Mountain, Georgia, United States. Wikipedia.

Okeniyi J.O.,Covenant University | Ogunsanwo A.O.,Covenant University | Odiase N.W.,Covenant University | Obiajulu U.E.,Covenant University | Okeniyi E.T.,Covenant College
Journal of Engineering and Technological Sciences | Year: 2013

his paper studies a methane (CH4) emission model from the waste of cattle (B. primigenius) based on trends in integrated livestock-fish farming adoption by farmers in Nigeria. Dung of B. primigenius was employed as substrate in fish-water, obtained from a fish-rearing farm, as a matrix medium for simulating a low-oxygen wastewater environment of an agriculture-aquaculture system. A substrate to fish-water mass ratio of 1:3 was used, developed in a laboratory-size digesting reactor system. Volumetric readings, at ambient temperature conditions and with a retention time of thirty-two days, were then subjected to the logistic probability density function, and tested against correlation coefficient and Nash-Sutcliffe coefficient of efficiency criteria. The readings show that a volume of CH4-containing gas as high as 65.3 x 10-3 dm3 was produced on the 13th day from the B. primigenius substrate. Also, production of 234.59 × 10-3 dm3/kg CH4-containing gas, totaling 703.76 × 10-3 dm3, was observed through the studied retention time. The 60% CH4 constituent model of the measured gas generation showed a potency of 2.0664 kg emission per animal, which is equivalent to 43.3944 CO2eq of global warming potential (GWP) annually per animal. This bears environmental and climate change implications, and therefore alternative sustainable practices for integrated livestock-fish farming adoption are suggested. © 2013 Published by ITB Journal Publisher. Source

Zuidema D.R.,Covenant College | Herndon L.B.,Covenant College
Journal of Chemical Education | Year: 2016

Deborah Blum's New York Times bestselling nonfiction book The Poisoner's Handbook was used as supplementary reading in our first-term General/Organic/Biochemistry course. This course serves as both the first course for our Allied Health chemistry sequence and a core science course. Our goal was that, through reading this book, students would learn more about the origin of forensic chemistry in the historical context of the Jazz Age and the toxins that were often involved in poisonings near the beginning of the 20th century. Outcomes and student feedback to this initiative are discussed. © 2015 The American Chemical Society and Division of Chemical Education, Inc. Source

Ngai J.H.,Yale University | Schwendemann T.C.,Yale University | Walker A.E.,Yale University | Walker A.E.,Covenant College | And 5 more authors.
Advanced Materials | Year: 2010

An annealing technique to achieve single-unit-cell steps and predominant A-site termination was reported. The experiment involves tuning the vapor pressure of La using a LaAlO 3 (LAO) cover substrate in close proximity to the La 0.18 Sr 0.82Al 0.59Ta 0.41O 3 (LSAT) surface during high-temperature annealing. The alumina crucible was then inserted into a tube furnace and annealed using conditions noted in the text. The internal thermocouple of the furnace was used to obtain temperature measurements. Postannealing atomic force microscopy (AFM) imaging shows single-unit-cell steps on the surface, while reflection high-energy electron diffraction (RHEED) and ion scattering spectroscopy (ISS) indicate the presence of a highly ordered surface that is predominantly A-site (SrO) terminated. The results confirm that La near the LSAT surface helps suppress the formation of SrO. Source

Zuidema D.R.,Covenant College | Williams S.L.,Covenant College | Wert K.J.,Covenant College | Bosma K.J.,Covenant College | And 2 more authors.
Synthetic Communications | Year: 2011

Aryl ketones are readily deoxygenated to their corresponding aryl alkanes upon treatment with Raney nickel catalyst in boiling 2-propanol. © Taylor & Francis Group, LLC. Source

Janzen D.E.,St. Catherine University of Saint Paul | Vanderveer D.G.,Clemson University | Mehne L.F.,Covenant College | Grant G.J.,University of Tennessee at Chattanooga
Inorganica Chimica Acta | Year: 2010

We wish to report the synthesis of the Ru(II) crown thioether complex, (1,4,7,10,13-pentathiacyclopentadecane)chlororuthenium(II) hexafluorophosphate, [Ru([15]aneS5)Cl](PF6), and a study of its properties utilizing single crystal X-ray diffraction, electronic spectroscopy, NMR spectroscopy, density functional theory calculations and cyclic voltammetry. The crystal structure shows a single [15]aneS5 macrocycle and a chloro ligand coordinated in a distorted octahedral fashion around the ruthenium(II) center. A significant shortening (0.15 ) of the trans Ru-S bond length occurs in this complex compared to the related PPh3 complex (2.4458(10) to 2.283(1) ) due to the differences in the trans influence of the two ligands. 13C NMR spectroscopy demonstrates that the structure of [Ru([15]aneS5)Cl]+ is retained in solution. As expected for a Ru(II) complex, the electronic absorption spectrum shows two d-d transitions at 402 and 331 nm. These are red-shifted compared to hexakis(thioether)ruthenium(II) complexes and consistent with the weaker ligand field effect of the chloro ligand. The electrochemical behavior of the complex in acetonitrile shows a single one-electron reversible oxidation-reduction at +0.722 V versus Fc/Fc+ which is assigned as the Ru(II)/Ru(III) couple. DFT calculations for [Ru([15]aneS5)Cl]+ show a HOMO with orbital contributions from a t2g type orbital of the Ru ion, a π component from a p orbital of the axial S atom of [15]aneS5, and a p orbital of the chloro ligand while the LUMO consists of orbital contributions of dx2-y2 orbital of the Ru center and p orbitals of the four equatorial S donors. © 2010 Elsevier B.V. All rights reserved. Source

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