Browsing Chemistry by Title
Now showing items 102-121 of 839
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Characterization of PIBSI Dispersants and Their PIBSA Components by Pyrene Excimer Fluorescence
(University of Waterloo, 2020-12-18)Methods are introduced to characterize the products resulting from the coupling of a polyisobutylene terminated at one end with a succinic anhydride (PIBSA) and a polyamine to generate PIBSI products where the polyamine ... -
Characterization of Polysaccharides in Starch using Fluorescence Techniques
(University of Waterloo, 2020-09-25)Amylose and amylopectin, which are the two main constituents of starch, were characterized using the pyrene excimer fluorescence (PEF) technique. First, an amylose sample was randomly labeled with the dye pyrene to yield ... -
Characterization of Self-Assembling Quinoline- Based Foldamers by Fluorescence Anisotropy
(University of Waterloo, 2019-09-24)Foldamers represent a family of synthetic macromolecules which, like their biological counterparts, are able to adopt a well-defined conformation in solution. Oligoquinoline-carboxamides (Qn) are a group of foldamers that ... -
Characterization of Several Small Biologically Relevant Molecules by Infrared Multiple Photon Dissociation Spectroscopy and Electronic Structure Calculations
(University of Waterloo, 2011-04-29)Infrared multiple photon dissociation (IRMPD) spectroscopy has been coupled with electronic structure calculations in order to elucidate the structures of several small biological molecules including: uracil, 5-fluorouracil, ... -
Characterization of Starch Nanoparticles by Fluorescence Techniques
(University of Waterloo, 2014-05-21)Abstract The properties of starch nanoparticles (SNPs) labeled with the fluorescent dye pyrene (Py-SNPs) were probed by using fluorescence quenching, pyrene excimer formation, and transmission electron microscopy (TEM). ... -
Characterization of the Behaviour of Solution-Responsive Polymers by Fluorescence
(University of Waterloo, 2014-04-17)Two families of amphiphilic polymers were characterized with respect to their ability to respond to changing solution conditions using steady-state and time-resolved fluorescence. Firstly, a series of 5 sequential amphiphilic ... -
Characterization of the Conformation and Internal Backbone Dynamics of a-Polyglucans by Pyrene Excimer Fluorescence
(University of Waterloo, 2021-11-23)The conformation and internal backbone dynamics (IBD) of several pyrene-labeled polysaccharides (Py-PSs), namely Py-Amylopectin, Py-Glycogen, Py-Dextran, and Py-Pullulan, were successfully examined with a combination of ... -
Characterization of the Distribution of Pyrene Molecules in Confined Geometries with the Model Free Analysis
(American Chemical Society, 2017-12-21)Evidence is provided showing that global Model Free Analysis (MFA) of monomer and excimer fluorescence decays of pyrene dissolved in aqueous solutions of sodium dodecyl sulfate (SDS) provides the same structural and dynamic ... -
Characterization of the Interactions Between DNA and Oppositely Charged Species by Fluorescence
(University of Waterloo, 2011-01-24)The characterization of the interactions between DNA and oppositely charged species were characterized by fluorescence. Quantitative and insightful information on the distribution of positively charged species around the ... -
Characterization of the Long-Range Internal Dynamics of Pyrene-Labeled Macromolecules by Pyrene Excimer Fluorescence
(American Chemical Society, 2016-12)The long-range internal dynamics (LRID) of 74 pyrene-labeled macromolecules (PyLMs) were characterized in four solvents representing a broad range of dielectric constants equal to 2.4 (toluene), 7.6 (tetrahydrofuran, THF), ... -
Characterization of the Self-Assembly of Pyrene-Labelled Macromolecules in Water
(University of Waterloo, 2010-05-19)The self-assembly of several pyrene-labelled amphiphilic macromolecules in water was characterized by fluorescence. Information on their self-assembly was obtained by monitoring the level of pyrene aggregation in solution. ... -
Characterization of Various Pyrene-Labelled Macromolecules in Solution by Fluorescence
(University of Waterloo, 2010-11-04)Time-resolved fluorescence was applied to linear and branched pyrene-labelled macromolecules to study their internal dynamics. The linear macromolecules consisted of two series of pyrene-labelled poly(N-isopropylacrylamide)s ... -
Characterization, Quantification and Modification of Starch Nanoparticles
(University of Waterloo, 2014-09-22)Natural polymers, such as polysaccharides, have the potential to replace petroleum-based polymers in certain industrial applications. Ecosphere® starch nanoparticles (ENPs), produced by EcoSynthetix Inc., are starch-based ... -
Characterizing Humulone Content in Beer Using Differential Mobility Spectrometry
(University of Waterloo, 2018-09-19)Beer is a complex fermented beverage and several hundreds of components have been identified erenow. Hops are extremely important to beer’s organoleptic qualities, especially bitterness. Bitterness, a distinguishing component ... -
Characterizing Polymers with Complex Architecture using Pyrene Excimer Fluorescence
(University of Waterloo, 2021-09-29)This thesis combines two different models, namely the model free analysis (MFA) and the fluorescence blob model (FBM), that were used to study the conformation and internal dynamics of two highly branched macromolecules, ... -
Characterizing the Dimer Interface and Thermal Unfolding of Reduced, Zinc Bound Superoxide Dismutase-1
(University of Waterloo, 2018-04-30)Superoxide dismutase 1 (SOD1) is a ubiquitously expressed metalloenzyme that reduces oxidative stress in cells by catalyzing the dismutation of superoxide radicals. Mutations in the gene encoding for SOD1 have been linked ... -
Characterizing Transcriptional Networks in Male Rainbow Darter (Etheostoma caeruleum) that Regulate Testis Development over a Complete Reproductive Cycle
(PLOS, 2016-11-18)Intersex is a condition that has been associated with exposure to sewage effluents in male rainbow darter (Etheostoma caeruleum). To better understand changes in the transcriptome that are associated with intersex, we ... -
Chemical biopsy via solid phase microextraction: strategies and applications for in vivo brain studies
(University of Waterloo, 2020-08-19)Adequate and quantitative observation of neurochemical phenomena is instrumental in guiding efforts towards a better understanding of the mechanisms underlying brain functions. Although a plethora of highly focused mechanistic ... -
Chemical Modification of Polyisobutylene Succinimide Dispersants and Characterization of Their Associative Properties
(American Chemical Society, 2015-09-17)The secondary amines found in b-PIBSI dispersants prepared by attaching two polyisobutylene chains to a polyamine core via two succinimide moieties were reacted with ethylene carbonate (EC). The reaction generated urethane ... -
Chemical shift assignments of calmodulin constructs with EF hand mutations
(Springer, 2016-04-01)Calmodulin (CaM) is a ubiquitous cytosolic Ca2+-binding protein able to bind and regulate hundreds of different proteins. It consists of two globular domains joined by a flexible central linker region. Each one of these ...