Digital Commons Network^™

Reversibility Of Ct And Mr Findings In Neuro-Behçet Disease, Dushyant V. Patel, Michael J. Neuman, Daniel B. Hier

Chemistry Faculty Research & Creative Works

A Woman with Neuro-Behçet Disease Characterized by Recurrent Attacks of Meningoencephalitis is Reported. during an Attack of Brain Stem Dysfunction Characterized by Dysarthria, Diplopia, and Ataxia, the Postcontrast CT Showed an Enhancing Lesion of the Upper Brain Stem. during a Subsequent Attack Characterized by Subcortical Dementia and Amnesia, Magnetic Resonance (MR) Showed Abnormal Signal Intensity in the Hypothalamus and Upper Brain Stem. Upon Remission of Her Symptoms, Follow-Up Contrast Enhanced CT and MR Were Entirely Normal. Magnetic Resonance is Especially Useful in Localizing Acute Inflammatory Lesions in Behçet Disease. This Case Suggests that Abnormal MR and CT Findings in Neuro-Behçet …

Plasma Polymerization By Magnetron Glow Discharge. I. Effect Of Magnetic Field On Breakdown Of Monomers In Low Pressure, K. Sato, Y. Iriyama, D. L. Cho, H. Yasuda

Chemistry Faculty Research & Creative Works

The breakdown voltage Vb of glow discharge of an organic monomer generally decreases as the system pressure decreases; however, below a certain threshold pressure, the breakdown voltage increases with decreasing system pressure. In the pressure range below 100 mTorr, the breakdown voltage generally increases as a linear function of 1 /p, where p is the system pressure of the reactor. In this region, glow discharge without magnetic enhancement often yields unstable discharge, which is associated with a very steep slope of a line in the Vh vs /p plot. The similar plots for glow discharges of non-polymer-forming gases, such as …

Fluorinated [Beta]-Sultones As Precursors To Fluorinated Sulfonic Acids, And New Fluorosulfonyl Containing Monomers/Polymers, Javid Mohtasham

Dissertations and Theses

Sulfur trioxide (SO₃) adds to fluoroolefins of the form RCF=CF₂, (where R = F, SF₅, CF₃, CF₃OCF₂, CF₂=CF(CF₂)₂, CF₃(CF₂)₃O, CF₃O(CF₂)₂OCF₂, or CH₂ClCHClCH₂), yielding the fluorinated [beta]-sultones, RCFCF₂OSO₂. In the case of CF₃(CF₂)₃OCF=CF₂, a reverse addition occurs, giving the sultone, CF₃(CF₂)₃CF₂2OCFCF₂SO₂O. The fluoro [beta]-sultones are capable of undergoing different reactions, such as rearrangement, hydrolysis, esterification, and polymerization. These reactions, will result in the formation of compounds containing the fluorosulfonyl grouping (SO₂F); it is this group that yields the corresponding sulfonic acid upon base/acid treatment.

The addition of sodium bisulfite to CF₃CF= CF₂ and CF₃(CF₂)₄CF=CF₂ in the presence of (C₆H₅CO)₂O₂ and Na₂B₄O₇·10H₂O …

Tactical Nitrogen Decisions For Wheat, J. W. Bowden, R. J. Lunt

Experimental Summaries - Plant Research

Trial 88MO41, 88WH40 (2CE), 88WH40 (4W), 89NO77, 89MO47, 89MO47, 89MO49, 89BA33 (1), 89BA33 (2), 89WH70 (1), 89WH70 (2)

Locations: Wannamal, WHRS, Grass Valley, Regan's Ford, Badg. New Block 3CE

In order to test tactical and other fertilizer decision making methods (Table 1), we carried out three trials in 1988 and a further seven trials in 1989 (Table 2).

To date this programme has provided a lot of information which can be used to test and validate current (and future) methods of predicting yield potential and nitrogen status of a crop as the season progresses. However, our inability to predict end …

Effect Of Seed Phosphorus, Seed Size And Seedling Density On The Growth Of Lupins., M. M. Riley, M. D. Bolland, K. Adcock

Experimental Summaries - Plant Research

Trial 89SC22

Location: South Carrabin Research Station, Hayden paddock.

Effect of seed phosphorus concentration, fertilizer P level, seed size and seeding rate on plant counts at 6 to 21 weeks.

Effects Of Seed Phosphorus Concentrations And The Source Of The Seed On Growth Of Lupins., M. M. Riley, M. D. Bolland, K. Adcock

Experimental Summaries - Plant Research

Trial 89EC31

Location: East Chapman Research Station.

The effect of seed phosphorus concentration, source of seed and fertilizer P level on plant counts from six to 20 weeks.

Cultivar Evaluation On Low Rainfall Heavy Textured Soils., Bradley Nutt

Experimental Summaries - Plant Research

a. Trial 88GE34

Cultivar evaluation in machine sown plots.
Location: NMRS

The higher seed yield of Serena compared to the other cultivars resulted in better early forage .production as well a legume dominated pasture.

b. Trial 88TS 63 and 88TS 65

Wheat yields following pastures.
Location: 88TS63 - Perenjori and 88TS65 - Three Springs.

There was no response to nitrogen in either biological yield or grain yield of wheat sown over volunteer based pasture at the Three Springs site. All pasture treatments resulted in similar wheat yields except for Sava because of poor control of the snail medic under the …

Aphid Tolerance Evaluation In Annual Medics., Bradley Nutt

Experimental Summaries - Plant Research

Trial 89GE61

Location: East Chapman

Out of the 100 lines tested, 30 experimental lines were less affected (in terms of seed yield) by aphid damage than c.v. Parabinga.

Effect Of Seed Phosphorus Levels In Three Wheat Varieties And Fertilizer P Supply On Their Growth And Grain Yields., M. M. Riley, M. D. Bolland, K. Adcock

Experimental Summaries - Plant Research

Trial 89WH74

Location: Wongan Hills Research Station, Field 4W

Effect of phosphorus and fertilizer on the growth and grain of wheat yields.

Potassium Nutrition Of Pastures On The Sandplain Soils Of Western Australia., Noeleen Edwards, M. Thomas

Experimental Summaries - Plant Research

Project: Potassium nutrition of pastures on the sandplain soils of Western Australia.

Determine the factors affecting the fate of native and applied potassium on sandplain soils.
Define current and residual response curve parameters for potassium applications. Develop recommendations for the economic management of soil potassium levels.

Trial 88B46, 88TS69, 89KO26

Maintenance application rates of potassium on sandplain soils.

Location: Badgingarra Research Station, new block, North Eneabba, Kojaneerup Research Block.

Trial 89BA24

Residual value of potassium on sandplain soils.

Location: Badgingarra Research Station

Trial 89MT46,

Potassium requirements of sub clover.

Location: Mt Barker Research Station.

Project: Potassium nutrition of lupins on …

Reactions Of Substituted Pyridinium Salts With Cyanide; Formation And Metal Complexes Of 2,2'Bis (Hydroxymethyl)-4,-4'Bipyridine, Dorothy N. Eseonu

Theses and Dissertations

The unique combination of properties of bipyridinium salts and their use in biological systems, chemical reactions, and as herbicides in agriculture have made them a discovery of major international importance. The controversy about the position of attack of the cyanide ion on the pyridine ring and the discovery of the formation of unsubstituted bipyridinium salts from the reaction of pyridinium salt with cyanide ion opened a new area of research. The current work involved a study of reactions of substituted pyridinium salts with cyanide ion. The substituted pyridinium salts were prepared by the literature methods. The 2- and 3- cyanopyridinium …

A Novel Synthesis Of Cyclic And Acyclic 3-Alkenoic Acids Via Ionization/Elimination Of Β-Lactones, Stephen Lucas Maluleka

Masters Theses

Exposure of spiro β-lactones and 3-substituted 4,4-dialkyl oxetan-2-ones to magnesium bromide in diethyl ether solvent resulted in the smooth generation of β,γ-unsaturated acid derivatives in high yield and isomeric purity. It is believed that this reaction occurs via the formation of a stable tertiary carbocation at the β-carbon resulting from cleavage of the carbon-oxygen sigma bond due to the complexation of magnesium cation with the ring oxygen atom. Rapid loss of an adjacent proton then furnishes the unsaturated acids. The β-lactone precursors were prepared by the dehydration of β-hydroxy acid derivatives (obtained from the condensation of ketones with acetic acid …

Reactions Of Hydroxyl Radicals And Chlorine Atoms With Compounds Of Group Iv Elements., Denis J. O'Farrell

Doctoral

Rate data are reported for the reaction of hydroxyl radicals with a series of substituted silanes. The data presented suggest the presence of polar effects in the transition state. Good agreement is reported between a relative rate study and an absolute rate study, Table (i). The corresponding reaction of chlorine atoms with the series of substituted silanes support the suggestion of polar effects in the transition state, Table (ii). Rate data are also reported for the reaction of hydroxyl radicals with a series of tetramethyl and tetraethyl compounds of the Group IV elements. The data presented show an enhanced reactivity …

Theoretical Studies Of The Energies And Geometries Of Strained Hydrocarbons, Mitchell Alan Miller

Dissertations, Theses, and Capstone Projects

Theoretical models are used to explore problems of interest to organic chemists in four projects. The first three apply existing methodologies to investigate a series of strained cyclic hydrocarbon molecules; the fourth develops methodology.

Project I. Semiempirical calculations have been performed on a variety of hydrocarbons composed of fused cyclobutane rings using the MNDO, AM1 and MM2 methods. The systems studied include linearly concatenated cyclobutanes (ladderanes), cyclic structures (prismanes) and two 'star-shaped' C₂₄H₂₄ hydrocarbons, helvetane and israelane. The results reported include optimized geometries, heats of formation and vibrational frequencies. The performance of the theoretical models is evaluated …

A Near Infrared Study Of The Heteroassociation Of 2-Phenyl-2-Propanol With Four Lewis Bases, Yumin Chen

Dissertations and Theses @ UNI

This research involved a thermodynamic investigation of the heteroassociation of 2-phenyl-2-propanol with four Lewis bases (pyridine, benzophenone, acetone, and dimethyl sulfoxide) in carbon tetrachloride solution using the near infrared spectroscopic method. The first overtone peak of the free 0-H stretching frequency was employed in this study to measure the equilibrium concentration of the non-associated 2-phenyl-2-propanol. The equilibrium concentrations of other substances involved in the reaction were then calculated stoichiometrically and an equilibrium constant K_eq was obtained. By measuring the K_eq at various temperatures and drawing the plot of Ln K_eq vs. 1/T, the enthalpy change and entropy …

Polymerization Of Methane, Ashok K. Sharma, H. Yasuda

Chemistry Faculty Research & Creative Works

Plasma polymerization of methane in a magnetically enhanced capacitively coupled bell jar reactor operating at a frequency of 10 kHz is reported. Dependence of polymer deposition rate on monomer feed rate (F), composite power parameter (W/FM), electrode temperature, and electrode cleanliness have been examined. Such functional properties as wettability, adhesion, and thermal stability of the polymer are found to depend on the composite power parameter (W/FM) of the plasma. The permeability studies indicate highly crosslinked nature of the polymer. ESCA studies reveal code position of electrode material with the polymer under high W/FM conditions, potential applications of plasma polymer of …

Mössbauer Effect Studies Of Nd₂Fe₁₄₋ₓsiₓb And Y₃Fe₁₄₋ₓsiₓb, Oran Allan Pringle, Gary J. Long, G. K. Marasinghe, William Joseph James, Antoni T. Pedziwiatr, W. E. Wallace, Fernande Grandjean

Physics Faculty Research & Creative Works

No abstract provided.

Measured Spectra Of The Hygroscopic Fraction Of Atmospheric Aerosol Particles, Darryl J. Alofs, Donald E. Hagen, Max B. Trueblood

Mechanical and Aerospace Engineering Faculty Research & Creative Works

The Relation between Dry Diameter (Xo) and Critical Supersaturation (Sc) for Atmospheric Submicron Aerosol Particles is Investigated. the Particles Are Passed through an Electrostatic Aerosol Size Classifier, and Then through an Isothermal Haze Chamber. Results Are Reported in Terms of an Apparent Volume Fraction of Soluble Material, Εv, Defined Such that for Particles Composed Only of Ammonium Sulfate and Water Insoluble Compounds, Εv is the Actual Volume Fraction of Soluble Material. the Probability Distribution of Εv is Found to Be Approximately Gaussian in the Εv Range 0.2 to 1.3. the Mean Εv is 0.5, for Electrostatic Aerosol Classifier Settings of …

Structural And Functional Studies Of The Plant Lectin Peanut Agglutinin, Eugene J. Zaluzec

Dissertations

No abstract provided.

Rotoreflected Double-Beam Thermal Lens Spectrometry And Simultaneous Thermal Lens And Fluorescence Detection For High Performance Microbore Liquid Chromatography, Steven Craig Hall

Dissertations

No abstract provided.

Multinuclear Magnetic Resonance Studies Of Lithium Binding And Transport In Human Erythrocytes, Maryceline Tiausas Espanol

Dissertations

No abstract provided.

Synthesis And Study Of N-(4-Nitrobenzofurazan)-Monoaza-18-Crown-6: A Metal Sensitive Fluorophore, Shelley A. Krause

Dissertations

No abstract provided.

Quantitative Footprinting Analysis Using A Dna-Cleaving Metalloporphyrin Complex+, James C. Dabrowiak, Brian Ward, Jerry Goodisman

Chemistry - All Scholarship

The results of quantitative footprinting studies involving the antiviral agent netropsin and a DNA-cleaving cationic metalloporphyrin complex are presented. An analysis of the footprinting autoradiographic spot intensities using a model previously applied to footprinting studies involving the enzyme DNase I [Ward, B., Rehfuss, R., Goodisman, J., & Dabrowiak, J. C. (1988) Biochemistry 27, 1198-12051 led to very low values for netropsin binding constants on a restriction fragment from pBR-322 DNA. In this work, we show that, because the porphyrin binds with high specificity to DNA, it does not report site loading information in the same manner as does DNase I. …

Synthesis Of N And C Nucleosides Via Cycloaddition Reactions A New Approach To An Old Problem, Glenn L. Heise

Dissertations

No abstract provided.

Anti-Cancer Action Of Metal Complexes: Electron Transfer And Oxidative Stress?, Peter Kovacic, William J. Popp, James R. Ames, Michael D. Ryan

Chemistry Faculty Research and Publications

Evidence is presented in support of an electron transfer mechanism for various metal complexes possessing anti-neoplastic properties. Cyclic voltammetry was performed on several metallocenes, bis(acetato)bis(imidazole)Cu(II), and coordination compounds (Cu or Fe) of the anti-tumor agents, bipyridine, phenanthroline, hydroxyurea, diethyldithiocarbamate, and α, α¹-bis(8-hydroxyquinolin-7-yl)-4-methoxytoluene. The favorable reduction potentials ranged from +0.5 to -0.5 V. Electrochemical behavior is correlated in some cases with structure and physiological activity. Relevant literature data are discussed.

Micellar Catalyzed Hydrolysis Of Hydroxamic Acids By Perfluorooctanoic Acid, Mohammad Hashem Akhavan Tafti

Masters Theses

The work reported herein demonstrated that a perfluorocarboxylic acid does indeed behave as a reactive counterion surfactant exhibiting micellar catalysis, this conclusion was further verified by subsequent experimentation.

Rates of acidic hydrolysis of octano-, phenylaceto-, and 4-bromo phenylacetohydroxamic acid have been determined in aqueous perfluorooctanoic acid--a reactive counterion surfactant system. Typical micellar catalysis was observed for the hydrolysis of octanohydroxamic acid but not for the arylacetohydroxamic acids.

Further investigation into finding a more water soluble surfactant which has reactive counter ions is suggested in order to test the theoretical equation (based on the pseudo phase model) appropriate for this surfactant …

Interactions Of Water-Soluble Metalloporphyrins With Nucleic Acids Studied By Resonance Raman Spectroscopy, Jinghua H. Schneider, Junichi Odo, Kazuo Nakamoto

Chemistry Faculty Research and Publications

The resonance Raman spectra of water-soluble porphyrins, M(TMpy-P4) (M = Cu(II), Ni(II) and Co(III)) and their mixtures with poly(dG-dC)₂, poly(dA-dT)₂ and calf thymus and salmon DNAs were measured using a divided rotating cell to determine the magnitudes of frequency shift and intensity variation resulting from M(TMpy-P4)-nucleic acid interactions. Bands II(Cβ-H bending, ˜ 1100 cm-1) and VIII(Cβ-Cβ stretch, ˜ 1570 cm-1) show a large and small upward shift, respectively, when Cu(TMpy-P4) and Ni(TMpy-P4) are intercalated at the G-C sites. In contrast, these bands show a small upward and downward shift, respectively, when Co(TMpy-P4) is groove-bound at the A-T …

Sulfide In Surface Waters Of The Western Atlantic Ocean, Gregory A. Cutter, Christian F. Krahforst

OES Faculty Publications

Using newly developed techniques, some preliminary data on hydrogen sulfide in surface waters of the western Atlantic have been obtained. Concentrations of total sulfide range from <0.1 to 1.1 nmol/L, and vary on a diel basis. At these concentrations, sulfide may affect the cycling of several trace metals via the formation of stable complexes. Production of sulfide in oxygenated seawater may occur through the hydrolysis of carbonyl sulfide or by sulfate reduction within macroscopic particles in the water column. Removal mechanisms can include oxidation, complexation with particulate trace metals, and metal sulfide precipitation. However, the temporal and spatial distributions suggest a complex set of processes governing the behavior of sulfide in the surface ocean.

A Mössbauer Effect Study Of Y₂Fe₁₄B And Its Aluminum Solid Solutions, Dwayne E. Tharp, Gary J. Long, Oran Allan Pringle, Gaya Kanishka Marasinghe, William Joseph James, Fernande Grandjean

Chemistry Faculty Research & Creative Works

The Mössbauer spectra of Y₂Fe₁₄B have been measured from 85 to 296 K. Analysis of the spectra indicates that the near-neighbor rare-earth atoms directly influence the orientation of the principal axis of the electric field gradient. The hyperfine parameters are very similar to those of Nd₂Fe₁₄B, but the internal fields are somewhat smaller at room temperature in the yttrium compound. The Mösssbauer spectra of Y₂(Fe_1-xAl_x) ₁₄B, where x equals 0.00, 0.02, 0.04, 0.06, and 0.08, have been measured at 85 K. The average internal hyperfine …

A Neutron Diffraction And Mössbauer Spectral Study Of The Structure And Magnetic Properties Of The Y₂Fe₁₄₋ₓsiₓb Solid Solutions, Gaya Kanishka Marasinghe, Oran Allan Pringle, Gary J. Long, William B. Yelon, Fernande Grandjean

Physics Faculty Research & Creative Works

A neutron diffraction and Mössbauer spectral study of Y₂Fe_14-xSi_xB shows that silicon preferentially occupies the 4c, and to a lesser extent, the 8j₁ sites in Y₂Fe_14-xSi_xB. The trend in the site occupancy is the same as in Nd₂Fe_14-xSi_xB. The Curie temperature of Y₂Fe_14-xSi_xB increases with increasing silicon content. Neutron diffraction data show that the increase in Curie temperature is accompanied by a contraction of the unit cell. Wigner-Seitz cell calculations, using the Y₂Fe …