Browsing Chemistry & Biochemistry Theses and Dissertations by Issue Date
Now showing items 1-20 of 513
-
The Effect of Changes in Structure of the Reactants on the Rate of Enamine Formation
(1964)It has been found that the rate of formation of a wide variety of enamines can be accurately determined by observing the rate at which the by-product water collects in a Dean-Stark trap. On the basis of the results observed ... -
The Photochemistry of Amides and Phthalimides
(1977)N-Alkyl amides undergo photodecomposition much slower than their ketone, ester, and aldehyde analogs . The Norrish Type II process in amides is also less important than in these other classes of compounds due to electronic ... -
Micro-scale Chemical Effects of Low Temperature Weathering of DSDP Basaltic Glasses
(1979)Unaltered deep-sea basaltic g lasses are believed to be the best record of initial magma composition , and as such are important in the study of petrogenesis. However , these glasses are altered by their long contact ... -
The Role of Hydrogen Cyanide in Chemical Evolution
(1989)Two major research areas are investigated: The electrosynthesis of hydrogen cyanide; and the role of cyanocomplexes in the free - radical oligomerization of hydrogen cyanide. The electric discharge production of ... -
Investigation of the Tetrahymena Pyriformis 2-Aminoethylphosphonic Acid Biosynthetic Pathway and the P-C Bond Forming Enzyme Phosphoenolpyruvate Mutase
(1991)The biosynthetic pathway leading to 2-aminoethylphosphonate in Tetrahymena pyriformis was determined. A cell-free homogenate of T. pyriformis converted phosphoenolpyruvate to AEP in 37% yield, phosphonopyruvate to AEP ... -
Release of Aluminum, Arsenic, Cadmium, Chromium, Copper, Iron, Lead, and Zinc in a Coal Leachate, and their Removal from Solution Undergoing Neutralization
(1992)Whole coal contains significant amounts of iron pyrite which is oxidized ultimately to ferric acid sulfate. As a result, trace elements are released from the coal and other minerals in potentially hazardous concentrations. ... -
Transition Metal Polypnictides from Zintl Ions
(1995)The chemistry of the soluble E7 3- ions (E = P, As, Sb) with various transition metal complexes has been investigated. Alloys of K3E7 react with (arene)M(CO)3 (M = Cr, Mo, W) complexes in the presence of three equivalents ... -
CHROMIUM OXIDATION AND REDUCTION BY HYDROGEN PEROXIDE IN DIVERSE SOILS AND SIMPLE AQUEOUS SYSTEMS
(1999)Hydrogen peroxide is being tested for in situ remediation of buried contaminants - either as a direct chemical oxidant in Fenton-type reactions or as a source of oxidizing equivalents in bioremediation. How it affects a ... -
Multidimensional Protein Separations in a Plastic Microfluidic Network
(2003)The field of microfabrication of bioanalytical devices has grown significantly over the last decade from academic research to several commercially available systems. The performances of the microfluidic systems in terms ... -
Ion Binding and Transport by Synthetic Molecular Assemblies
(2003-10-24)Self-assembly of small synthetic molecular building blocks has been applied to generate functional structures capable of binding and transporting cations and anions. Major discoveries from the research include a self-assembled ... -
A TWO-DIMENSIONAL MICROFLUIDIC SEPARATION PLATFORM FOR HIGH-THROUGHPUT GENETIC MUTATIONAL ANALYSIS
(2003-11-21)A principal challenge to upgrading genetic-based disease prevention and management is the establishment of new mutation detection strategies that surpass the performance and capabilities of traditional gel-based approaches. ... -
Superfluidity in a Degenerate Atomic Fermi Gas
(2003-11-25)Dilute atomic gases have become a powerful tool for studying many-body quantum mechanics. The best example of this is the achievement of Bose-Einstein condensation in 1995 in a gas of Bose atoms, a discovery which has ... -
Allostery in GroEL: Its Role in the Refolding of Protein Substrates
(2003-12-01)The Escherichia coli chaperonin GroEL assists in the re-folding of misfolded substrate proteins (SPs). In response to the binding of ATP, GroEL undergoes large, allosteric structural transitions, resulting in an expansion ... -
Amidinate Based Catalysts for the Stereospecific and Living Ziegler-Natta Polymerization of Alpha-Olefins
(2003-12-04)The living Ziegler-Natta polymerization of alpha-olefins has been accomplished with a series of precatalysts based on cyclopentadienyl and pentamethylcyclopentadienyl zirconium amidinates (Cp and Cp*ZA's, respectively) ... -
Intercalated MoS2 Nanoparticles for Enhanced Dispersion in Smokes and Obscurants
(2003-12-05)The intercalation of MoS2 with diethyl oxalate (DEO) and Meldrum's Acid (MA) has been achieved via an exfoliation and reflocculation process. Ethyl diazoacetate (EDA) did not intercalate under identical conditions. The ... -
Benzoyl-CoA Reductase: A Biological Birch Reduction
(2003-12-08)Benzoyl-CoA reductase, isolated from the anaerobic bacterium Thauera aromatica, catalyzes the ATP-dependent, two-electron reduction of the aromatic ring of benzoyl-CoA. A Birch-like mechanism, which involves two separate ... -
TRANSFER OF NISIN GENE CLUSTER FROM Lactococcus lactis INTO THE CHROMOSOME OF Bacillus subtilis 168
(2003-12-12)The posttranslationally modified antimicrobial peptide nisin belongs to the family of lantibiotics, which constitute a group of small peptides that contain a high proportion of unusual amino acids. These unusual residues ... -
METHODS FOR STEREOSELECTIVE SYNTHESIS OF GLYCOPYRANOSYLAMIDE LINKAGE
(2004-02-20)Glycoproteins play an important role in biological processes including intercellular communication, cell-cell recognition, and cell growth regulation. The study of cellular processes is often limited by the availability ...