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Filtering by: Creator Parra, Gabriel I. Remove constraint Creator: Parra, Gabriel I. Academic Affiliation Chemistry Remove constraint Academic Affiliation: Chemistry Decade 1980-1989 Remove constraint Decade: 1980-1989

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  • Phenolic oxidative coupling : an approach to the synthesis of pretazettine

    Creator:
    Chong, Wesley Kwan Mung
    Abstract:
    Various hypervalent iodine compounds were evaluated as reagents for intramolecular phenolic oxidative coupling. It was found that phenyliodine(III) bis(trifluoroacetate) was effective for the coupling of the monophenolic substrate 13a to 14a under neutral conditions. Vanadium oxytrifluoride and hypervalent iodine compounds were compared as oxidants for the conversion of 32 to...
    Resource Type:
    Dissertation
    Full Text:
    . ACKNOWLEDGEMENTS I would like to thank Dr. James D. White, who always provided direction and unfailing enthusiasm

  • Nonlinear Raman spectroscopy of gases

    Creator:
    Lundeen, Thomas F.
    Abstract:
    Applications of several methods of coherent nonlinear Raman Spectroscopy have been made in this thesis research. The theory and potential of one of these, Photoacoustic Raman Spectroscopy (PARS), is discussed in chapter two. Experimental results are presented which illustrate the sensitivity of this method and establish sampling conditions for maximum...
    Resource Type:
    Dissertation
    Full Text:
    Where Xi is the i'th order dielectric susceptibility tensor of rank i+1. The quadratic term (X2) ) n

  • Structural effects of intrinsic and extrinsic perturbations to model membranes

    Creator:
    Church, Sara E.
    Abstract:
    The observed and calculated structural parameters of three systems of phosphatidylcholine bilayers in fully-hydrated multilamellar vesicles (MLVs) were determined using x-ray diffraction techniques. The analysis used the x-ray reflections from the low-, intermediateand wide-angle regions of the diffraction patterns in the subgel, gel, rippled and fluid phases to determine the...
    Resource Type:
    Dissertation
    Full Text:
    and presented by Sara E. Church DEDICATION to my husband ACKNOWLEDGEMENTS I wish to thank

  • Design, construction and application of an instrument for simultaneous measurement of molecular fluorescence, absorbance and chemiluminescence

    Creator:
    Yappert, Marta Cecilia
    Abstract:
    An instrument was constructed to measure molecular fluorescence (FL) or chemiluminescence (CL) and absorbance (ABS) simultaneously. The lower, middle, and upper portions of the test solution are probed to obtain ABS, FL, and CL data. Optical fibers are used extensively. The ABS and FL or CL spectra are acquired in...
    Resource Type:
    Dissertation
    Full Text:
    251 LIST OF TABLES I Error Introduced in the Correction Factor for Pre - Filter Effects When

  • Studies on the biosynthesis of the streptolidine moiety of streptothricin F

    Creator:
    Wityak, John
    Abstract:
    The loss of all deuterium labels from previous feedings of [2-²H]-, [3,3-²H₂]-, and [2,3,3-²H₃]arginines had indicated the possible intermediacy of β-hydroxy- and β-ketoarginine (30 and 31, respectively) in the biosynthesis of the streptolidine portion of streptothricin F (la). In order to confirm or refute this evidence, D,L-[2,3,3,5,5-²H₅]- arginine (32) was...
    Resource Type:
    Dissertation
    Full Text:
    trail. -Anonymous Acknowledgements I have many to thank for this achievement. Foremost on the list