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(4+2)-Cycloaddition Reactions of Ketenes; Pyranones
This study deals with the (4+2)-cycloaddition reactions of 4-π electron compounds with ketenes. Chloroketenes were generated in situ from the corresponding chlorinated acid chlorides in the presence of the ketenophiles. Chloro-, dichloro- and diphenylketenes reacted with 1-methoxy-3-trimethylsiloxy-l,3-butadiene, and 2,4-bis(trimethylsiloxy)-1,3-pentadiene to yield the corresponding dihydropyrans. The dihydropyrans yielded substituted 4-pyranones on hydrolysis.
Date:
August 1983
Creator:
Agho, Michael O. (Michael Osarenogowu)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Abraham Model Correlations for Solute Transfer into 2-Ethoxyethanol from Water and from the Gas Phase
Article on Abraham model correlations for solute transfer into 2-ethoxyethanol from water and from the gas phase.
Date:
August 1, 2015
Creator:
Sedov, Igor A.; Stolov, Mikhail; Hart, Erin; Grover, Damini; Zettl, Heidi; Koshevarova, Victoria et al.
Object Type:
Article
System:
The UNT Digital Library
ASPARTATE 458 of Human Glutathione Synthetase is Important for Cooperativity and Active Site Structure
Article discussing ASPARTATE 458 of human glutathione synthetase.
Date:
August 5, 2011
Creator:
Brown, Teresa R.; Drummond, Michael L.; Barelier, Sarah; Crutchfield, Amanda S.; Dinescu, Adriana; Slavens, Kerri D. et al.
Object Type:
Article
System:
The UNT Digital Library
Band Structure and Quantum Conductance of Nanostructures from Maximally Localized Wannier Functions: The Case of Functionalized Carbon Nanotubes
Article on band structure and quantum conductance of nanostructures from maximally localized Wannier functions.
Date:
August 12, 2005
Creator:
Lee, Young-Su; Buongiorno Nardelli, Marco & Marzari, Nicola
Object Type:
Article
System:
The UNT Digital Library
Benzo[ghi]perylene versus Pyrene as Solute Probes for Polarity Determination of Liquid Organic Salts Used in Chromatography
Article on benzo[ghi]perylene versus pyrene as solute probes for polarity determination of liquid organic salts used in chromatography.
Date:
August 19, 1988
Creator:
Street, Kenneth W.; Acree, William E. (William Eugene); Poole, Colin F. & Shetty, Prabhakara H.
Object Type:
Article
System:
The UNT Digital Library
Buckminsterfullerene, C₆₀: Improved Synthesis, Electron Microscopy, Electron States, Anions and Related Aspects
This article describes the synthesis and characterization of C₆₀, by means of electron microscopy, electron states, cyclic voltammetry and other techniques.
Date:
August 19, 1991
Creator:
Pradeep, T.; D'Souza, Francis; Subbanna, G.N.; Krishnan, V. & Rao, C.N.R.
Object Type:
Article
System:
The UNT Digital Library
Calculations of the Relative Energies of the 2B1g and 2A2u States of Cyclobutanetetraone Radical Cation and Radical Anion Provide Further Evidence of a 3B2u Ground State for the Neutral Molecule: A Proposed Experimental Test of the Prediction of a Triplet Ground State for (CO)4
Article on a proposed experimental test of the prediction of a triplet ground state for (CO)4.
Date:
August 18, 2009
Creator:
Zhou, Xin; Hrovat, David A. & Borden, Weston T.
Object Type:
Article
System:
The UNT Digital Library
Cation-specific and anion-specific Abraham model correlations for solute transfer into ionic liquid solvents
Article discussing research on cation-specific and anion-specific Abraham model correlations for solute transfer into ionic liquid solvents.
Date:
August 2010
Creator:
Grubbs, Laura M.; Saifullah, Mariam; De la Rosa, Nohelli E.; Acree, William E. (William Eugene); Abraham, M. H. (Michael H.); Zhao, Qichao et al.
Object Type:
Article
System:
The UNT Digital Library
A Chemical Analysis of Yellow Dent Corn
This study examines history, climate, and distribution in relation to the chemical content of yellow dent corn.
Date:
August 1939
Creator:
Hamby, R. B.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Chemical Investigation of Lake Dallas to Determine the Factors Influencing Plankton Growth.
A study to determine the organic content of Lake Dallas, and study the influence on plankton growth.
Date:
August 1939
Creator:
Welch, Herschel
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Comment on "Systematic Investigation of the Sorption Properties of Polyurethane Foams for Organic Vapors"
This article gives a comment to a previous article entitled "Systematic investigation of the sorption properties of polyurethane foams for organic vapors."
Date:
August 4, 2007
Creator:
Sprunger, Laura M.; Acree, William E. (William Eugene) & Abraham, M. H. (Michael H.)
Object Type:
Article
System:
The UNT Digital Library
Comments on "Topological investigation of molecular interactions in ternary mixtures of non-electrolytes: Excess Gibbs free energy of mixing"
Article commenting on "Topological investigation of molecular interactions in ternary mixtures of non-electrolytes: Excess Gibbs free energy mixing."
Date:
August 1991
Creator:
Acree, William E. (William Eugene)
Object Type:
Article
System:
The UNT Digital Library
Correlation and prediction of partition coefficient between the gas phase and water, and the solvents dry methyl acetate, dry and wet ethyl acetate, and dry and wet butyl acetate
Article discussing research on the correlation and prediction of partition coefficient between the gas phase and water, and the solvents dry methyl acetate, dry and wet ethyl acetate, and dry and wet butyl acetate.
Date:
August 25, 2008
Creator:
Sprunger, Laura M.; Proctor, Amy; Acree, William E. (William Eugene); Abraham, M. H. (Michael H.) & Benjellou-Dakhama, Nora
Object Type:
Article
System:
The UNT Digital Library
Correlation consistent basis sets designed for density functional theory: Second-row (Al-Ar)
Article presenting cc-pV(n+d)Z correlation consistent basis sets of double- through quintuple-ζ quality for the atoms Al-Ar that have been modified for use with density functional theory (DFT). These basis set modifications include truncation of high-angular momentum basis functions, recontraction of the s- and p-functions, and reoptimization of basis function exponents with generalized gradient approximation and hybrid-DFT functionals. The effects of basis set truncation, recontraction, and reoptimization are shown to improve convergence behavior in atomic energies as well as dissociation energies and enthalpies of formation.
Date:
June 8, 2019
Creator:
Mahler, Andrew; Determan, John J. & Wilson, Angela K.
Object Type:
Article
System:
The UNT Digital Library
Correlation of solute transfer into alkane solvents from water and from the gas phase with updated Abraham model equations
This article discusses the correlation of solute transfer into alkane solvents from water and from the gas phase with updated Abraham model equations.
Date:
August 25, 2011
Creator:
Stephens, Timothy W.; Quay, Amanda N.; Chou, Vicky; Loera, Matthew; Shen, Connie; Wilson, Anastasia et al.
Object Type:
Article
System:
The UNT Digital Library
A Dark Adaptation Study of College Men and Women
This study is the result of tests conducted to determine the adaptability of the human eye to darkness.
Date:
August 1940
Creator:
Henry, Archie
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Descriptors for Pentane-2,4-dione and Its Derivatives
This article uses equations for partition coefficients of compounds from water and the gas phase to various solvents to obtain descriptors for pentane-2,4-dione and 21 of its derivatives.
Date:
August 19, 2017
Creator:
Abraham, M. H. (Michael H.) & Acree, William E. (William Eugene)
Object Type:
Article
System:
The UNT Digital Library
The Determination of the Constants in the System of Methyl Alcohol, Formic Acid, Methyl Formate and Water
Problems presented in this paper concern the chemical equilibrium of methyl alcohol, formic acid, and methyl formate when combined.
Date:
August 1939
Creator:
Cox, Ross L.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Development of Neutral Red as a pH/pCO2 Luminescent Sensor for Biological Systems
This article demonstrates for the first time that Neutral Red (NR) can also serve as a CO2 sensor, because of NR’s unique optical properties, which change with dissolved carbon dioxide (dCO2) concentrations. In this article optical sensitivity of NR was quantified as a function of changes in absorption and emission spectra to dCO2 in a pH 7.3 buffer medium at eight dCO2 concentrations.
Date:
August 5, 2021
Creator:
Ericson, Megan N.; Shankar, Sindhu K.; Chahine, Laya M.; Omary, Mohammad A.; Hunt von Herbing, Ione & Marpu, Sreekar
Object Type:
Article
System:
The UNT Digital Library
Development of Novel Approaches to Earth-abundant Methane Catalysis
Data management plan for the grant "Development of Novel Approaches to Earth-abundant Methane Catalysis." Research on catalytic cycles for C–H activation and functionalization of light alkanes based on the CMD (concerted metalation deprotonation) mechanism will be modeled for Earth-abundant metal dicarboxylates and related complexes. The impact of inner and outer coordination sphere effects upon catalytic cycles for light alkane functionalization will be assessed using computational chemistry techniques. The aforementioned studies will be leveraged to identify promising, synthetically feasible lead catalysts for experimental collaborators.
Date:
2021-08-15/2024-08-14
Creator:
Cundari, Thomas R., 1964-
Object Type:
Text
System:
The UNT Digital Library
Diffusion of Hydrocarbons Through Rubber Membranes
This thesis explores the seperation of isomeric paraffins in organic chemistry and how the resulting mixture of hydrocarbons might be examined.
Date:
August 1939
Creator:
Long, Loren M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
N-Doped graphene/C₆₀ covalent hybrid as a new material for energy harvesting applications
This article systematically investigates the degree of functionalization and the key structural features of the N-G/C₆₀ hybrid by a number of techniques including thermogravimetric analysis, X-ray photoelectron and Raman spectroscopies and transmission electron and atomic force microscopies.
Date:
August 26, 2018
Creator:
Barrejón, Myriam; Arellano, Luis M.; Gobeze, Habtom B.; Gómez-Escalonilla, María J.; Fierro, Jose Luis G.; D'Souza, Francis et al.
Object Type:
Article
System:
The UNT Digital Library
Effect of halogen substitution on the enthalpies of solvation and hydrogen bonding of organic solutes in chlorobenzene and 1,2-dichlorobenzene derived using multi-parameter correlations
Article on the effect of halogen substitution on the enthalpies of solvation and hydrogen bonding of organic solutes in chlorobenzene and 1,2-dichlorobenzene derived using multi-parameter correlations.
Date:
August 12, 2015
Creator:
Varfolomeev, Mikhail A.; Rakipov, Ilnaz T.; Khachatrian, Artashes A.; Acree, William E. (William Eugene); Brumfield, Michela & Abraham, M. H. (Michael H.)
Object Type:
Article
System:
The UNT Digital Library
Effect of Solvent Polarity and Acidity on Fluorescence Emission Fine Structures of Select Aza-Polynuclear Aromatics and Dibenzo[b,n]perylene Hetero-Atom Derivatives
Article on the effect of solvent polarity and acidity on fluorescence emission fine structures of select aza-polynuclear aromatics and dibenzo[b,n]perylene hetero-atom derivatives.
Date:
August 1, 1991
Creator:
Tucker, Sheryl A. (Sheryl Ann); Acree, William E. (William Eugene); Tanga, Mary J.; Fetzer, John Charles, 1953-; Tokita, Sumio; Hiruta, Kimihiro et al.
Object Type:
Article
System:
The UNT Digital Library