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Browsing Department of Chemistry by Title

Now showing items 319-338 of 342

Tandem intramolecular photocycloaddition-retro-Mannich fragmentation as a route to indole and oxindole

Li, Yang (2012-02-22)

Irradiation of a tryptamine linked through its side-chain nitrogen to an alkylidene malonate residue results in an intramolecular [2 + 2] cycloaddition to the indole 2,3-double bond. The resultant cyclobutane undergoes s ...
Tandem mass spectrometric analysis of protein and peptide adducts of lipid peroxidation-derived aldehydes

Wu, Jianyong (2010-01-07)

The adduction of proteins and other biomolecules by electrophilic lipid peroxidation products such as 4-hydroxy-2-nonenal (HNE), 4-oxo-2-nonenal (ONE), malondialdehyde (MDA) or acrolein (ACR) is thought to be an initiati ...
Tetracalcium lanthanide borate oxide : structures and optical properties

Crossno, Stephen K. (1997-06-16)
Theoretical and experimental factors affecting the accuracy and precision of atomic absorption measurements

Bower, Nathan Wayne (1977-07-26)

A procedure for evaluating the precision of atomic absorption measurements is presented and applied to 21 elements under varying instrumental conditions. The experimental relative standard deviations (RSD's) in absorb ...
Theory of negative thermal expansion

Tao, Ju Zhou (2002-07-10)

Two framework oxide materials of the MO₃ network type have been synthesized and structurally characterized by synchrotron and X-ray powder diffraction and the Rietveld method in the temperature range 25~500 K. The resu ...
Thermal Cycling Effects on the Thermoelectric Properties of n-Type In,Ce-Based Skutterudite Compounds

Biswas, Krishnendu; Subramanian, M. A.; Good, Morris S.; Roberts, Kamandi C.; Hendricks, Terry J. (Springer, 2012-03-08)

n-Type In-filled CoSb₃ is a known skutterudite compound that has shown promising thermoelectric (TE) properties resulting in high dimensionless figure of merit values at elevated temperatures. Use in various waste heat r ...
Threshold ionization spectroscopy of metal clusters and metal-ligand complexes

Peng, Xianzhao (2002-01-22)

In this dissertation, we describe a spectroscopic study of metal clusters and metal-ligand complexes using pulsed field ionization zero kinetic energy (PFI-ZEKE) photoelectron spectroscopy and mass analyzed threshold i ...
Time-of-flight scattering and recoil spectrometry (TOF-SARS) applied to molecular liquid surfaces : a new approach to surface composition and orientation

Gannon, Thomas J. (1999-10-20)

In spite of their importance in many systems, liquid surfaces have been explored at the microscopic level to a much lesser extent than solids. Most surface analysis must take place in vacuum, a major drawback for liqui ...
Total synthesis of (+)-bourgeanic acid and conformational analysis of its dilactone

Johnson, Alan T. (Alan Thomas), 1957- (1990-11-15)
Total synthesis of (-)-7-epicylindrospermopsin

Hansen, Joshua D. (2002-11-25)
Total synthesis of indole alkaloids: pt. 1. Asymmetric synthesis of (-)-ibogamine. pt. 2. An approach toward the synthesis of koumine

Choi, Younggi (2003-02-04)

PART I. The preparation of (-)-ibogamine (1) in fourteen steps from benzoquinone and in 10% overall yield is a powerful illustration of the value of the asymmetric Diels-Alder reaction as a starting point in a multiste ...
Total synthesis of phorboxazole A

Lee, Tae Hee (2006-08-07)

The total synthesis of a highly potent cytotoxic marine natural product, phorboxazole A, is described. Both a palladium(II)-mediated and a palladium(II)-catalyzed intramolecular alkoxycarbonylation were used as key steps ...
Total synthesis of sparteine alkaloids from a common tetraoxobispidine intermediate

Melbardis, John (John Peter) (2009-03-03)

In previous work (Blakemore et al. Org. Lett. 2005, 7, 4721; Heterocycles 2006, 70, 609), successful elaborations of the lupine alkaloids (±)-α-isosparteine (dl-2) and (±)-β-isosparteine (dl-3) were realized from ...
Total synthesis of the marine toxin phorboxazole A using palladium(II)-mediated intramolecular alkoxycarbonylation for tetrahydropyran synthesis

Kuntiyong, Punlop; Lee, Tae Hee; Kranemann, Christian L.; White, James D. (Royal Society of Chemistry, 2012)

The potent antitumor agent phorboxazole A was synthesized from six subunits comprising C1-C2 (115), C3-C8 (98), C9-C19 (74), C20-C32 (52), C33-C41 (84) and C42-C46 (85). Tetrahydropyrans B and C containing cis-2,6-disubs ...
Trace analysis of halogenated polycyclic aromatic hydrocarbons from an electronic waste recycling area and Guangzhou, China

Gonzales, Leah R. (2011-06-15)

Halogenated Polycyclic Aromatic Hydrocarbons (X-PAHs) are ubiquitous contaminants that are thought to be generated by processes such as chemical industries and incomplete combustion, including waste incineration and elec ...
Tracking semi-volatile organic pollutants in remote lake systems

Usenko, Sascha (2007-04-02)

SOCs volatility and persistence properties cause many SOCs to become ubiquitous in the environment as well as accumulate in areas with lower temperatures such as polar or orographic regions. Many anthropogenic SOCs pose ...
Trans-Pacific and regional atmospheric transport of anthropogenic semivolatile organic compounds in the western U.S.

Primbs, Toby (2007-10-03)

The atmospheric transport of anthropogenic semivolatile organic compounds (SOCs) from Asian sources to the Western U.S. was investigated. In addition, the SOC extraction method was optimized. Hansen solubility parameter ...
The transient electric birefringence of nanomaterials: alignment mechanism, characterization, and its application towards aligned polymer nanocomposites

Teters, Chad N. (2009-09-04)

The experimental and theoretical bases of transient electric birefringence (TEB) and its application in a variety of nanomaterials, including Na-montmorillonite, cellulose nanocrystals (CNXL), and CdSe quantum dots (QDs) ...
Transition metal solar absorbers

Altschul, Emmeline Beth (2012-07-02)

A new approach to the discovery of high absorbing semiconductors for solar cells was taken by working under a set of design principles and taking a systemic methodology. Three transition metal chalcogenides at varying s ...
Transpacific transport of benzo[a]pyrene emitted from Asia

Zhang, Y.; Tao, S.; Ma, J.; Simonich, S. (European Geosciences Union, 2011)

A global-scale three dimensional atmospheric transport and chemistry model was applied to simulate transpacific transport of Benzo[a]pyrene (BaP) emitted from Asia. The model results were compared with observations at si ...