Physical Sciences and Mathematics Commons^™

Polymer Science And Engineering In Academy Institutes In The Northern Part Of The People's Republic Of China (North Of The Yangtze): Part I: Beijing", Otto Vogl, L. Shi

Otto Vogl

No abstract provided.

Expression Of Epstein-Barr Virus (Ebv) Dna And Cloned Dna Fragments In Human Lymphocytes Following Sendai Virus Envelope-Mediated Gene Transfer, David J. Volsky, Thomas Gross, Faruk Sinangil, Charles Kuszynski, Ronald Bartzatt, Timothy Dambaugh, Elliott Kieff

Chemistry Faculty Proceedings & Presentations

Purified EBV DNA and cloned DNA fragments were trapped in Sendai virus (SV) envelopes during envelope reconstitution. The DNA-loaded reconstituted envelopes (RSVE/DNA) served as gene-transfer vehicles using the capability of RSVE to fuse with normal and tumor cells. The efficiency of RSVE-mediated EBV DNA transfer into lymphoid tumor cells and fresh human lymphocytes was 5-10% of the enveloped 3H-labeled EcoRI fragment B of EBV DNA. Purified intracellular EBV (B95-8 strain) DNA induced EBV nuclear antigen (EBNA) in 0.2-1% of human lymphocytes, transiently stimulated cellular DNA synthesis, but did not fully transform cells. Cloned Sal I F1 fragment [approximately equal to …

Characterization Of Glycated Proteins By 13C Nmr Spectroscopy, Carolyn I. Neglia, Helga J. Cohen, Albert R. Garber, Suzanne R. Thorpe, John W. Baynes

Faculty Publications

13C NMR spectroscopy has been used to characterize Amadori (ketoamine) adducts formed by reaction of [2-13C]glucose with free amino groups of protein. The spectra of glycated proteins were acquired in phosphate buffer at pH 7.4 and were interpreted by reference to the spectra of model compounds, N alpha-formyl-N epsilon-fructose-lysine and glycated poly-L-lysine (GlcPLL). The anomeric carbon region of the spectrum (approximately 90-105 ppm) of glycated cytochrome c was superimposable on that of N alpha-formyl-N epsilon-fructose-lysine, and contained three peaks characteristic of the alpha- and beta-furanose and beta-pyranose anomers of Amadori adducts to peripheral lysine residues on protein (pK alpha approximately …

Ab Initio Study Of The Insertions Of Methylene And Silylene Into Methane, Silane, And Hydrogen, Mark S. Gordon, David R. Gano

Mark S. Gordon

The transition states for several insertion reactions have been determined at the 3-21G level of theory. While the insertions of CH2 and SiH2 into the CH and SiH bonds of methane and silane, respectively, all have nonzero SCF barriers, only the insertion of silylene into methane retains a nonzero barrier when third-order Moller-Plesset perturbation theory corrections are included with the 6-31G* basis set. The intrinsic reaction coordinates for the carbene and silylene insertions into methane are used to provide a pictorial view of these reactions and to relate the calculations to earlier studies. The insertion of silylene into H2 is …

Polymer Science And Engineering In The Southern Part Of The People's Republic Of China (South Of The Yangtze): Part I: “Shanghai Area", Otto Vogl, T. Yu, B. Qian, S. J. Li

Otto Vogl

No abstract provided.

Ftir Analysis Of Aviation Fuel Deposits, Larry S. Helmick, Gary T. Seng

Science and Mathematics Faculty Publications

Five modes of operat1on (absorpt1on, em1ssion, single reflectance, attenuated total reflectance, and photoacoust1c) of a N1colet 7199 Fourier Transform Infrared Spectrophotometer have been 1nvest1gated in order to determ1ne which modes were most su1table for qualitative analysis of jet fuel depos1ts. The absorption and emission modes were'found to be the most advan~ tageous for invest1gation of the bulk and surface propert1es of accelerated storage/thermal depos1ts where relat1vely large quantit1es of depos1t are generally ava1lable.

The general effects of fuel type, stress temperature, stress time, type of sp1k1ng agent, sp1k1ng agent concentration, fuel flow, and postdepos1t1onal treatment on the chem1cal nature of …

Evaluation Of Plasma Polymers Of Silanes As Adhesion Promoters For Organic Paint, Y. Matsuda, H. Yasuda

Chemistry Faculty Research & Creative Works

Plasma-polymerized coatings were prepared in a bell-jar-type reactor equipped with a magnetron system behind parallel aluminum electrodes using an a.c. source of frequency 10 kHz. Tetramethoxysilane, dimethyldimethoxysilane and hexamethyldisilane were used as monomers. Alkyd paint was coated on titanium plates onto which plasma polymer films had been deposited, to investigate the characteristics of the plasma-deposited films as adhesion promoters. The relationship between the adhesion strength for the paint and the conditions for the plasma polymerization was studied. The properties of the plasma polymers are dependent on the conditions of plasma polymerization manifested by two domains, namely the energy-deficient and the …

Preparation Of Gas Separation Membranes By Plasma Polymerization With Fluoro Compounds, H. Nomura, P. W. Kramer, H. Yasuda

Chemistry Faculty Research & Creative Works

Plasma polymerization coatings were applied for the preparation of gas separation membranes. Mainly fluoro compounds were used as coating materials. The membranes showed good separation characteristics with high flux for gaseous systems. The plasma polymerization composite parameter given by W/FM plays an important role in obtaining excellent separation characteristics. The correlation between the conversion rate DR/FM, where DR is the deposition rate of plasma polymer, and W/FM is useful to consider the plasma polymer character under the different plasma polymerization conditions (discharge power W and monomer flow rate F). The proper conditions for membrane preparation lie in the intermediate region …

26th Rocky Mountain Conference

Rocky Mountain Conference on Magnetic Resonance

Program and abstracts from the 26th annual meeting of the Rocky Mountain Conference, co-sponsored by the Rocky Mountain Section of the Society for Applied Spectroscopy and the Rocky Mountain Chromatography Discussion Group. Held in Denver, Colorado, August 7-8, 1984.

Centers Of Polymer Research; Polymer Science And Engineering In Academy Institutes In The Southern Part Of The People's Republic Of China (South Of The Yangtze), Otto Vogl, W. Huang, Z. Ye, Z. Zhang, M. Cao

Otto Vogl

No abstract provided.

Aromatic Amine--Haloboranes : Evidence For Trigonal Boronium Cations, Debra H. Reid

Master's Theses

In the last twenty years Lewis adducts of boron trihalides and mixed boron trihalides have been examined using nuclear magnetic resonance spectroscopy. The donor to which the boron trihalide attaches has generally been some type of amine (strong donor), though oxygen, sulfur, phosphorous, and other donors ahve also been studied. The boron trihalide portion serves as the Lewis acid. Various nuclei (1H, 13C, 15N, 11B, 19F) have been examined in such boron trihalide adducts and the general trend in signal position in all 5 nuclei observed is (in order of increasing downfield shift) BF3

The acid strength of the boron …

Influence Of Crystal Fields On The Quasimetallic Reflection Spectra Of Crystals: Optical Spectra Of Polymorphs Of A Squarylium Dye, M. Tristani-Kendra, Craig J. Eckhardt

Craig J. Eckhardt Publications

The reflection and Kramers–Kronig absorption spectra have been obtained from the monoclinic and triclinic polymorphs of a squarylium dye, 2,4-bis(4-diethylamino-2-hydroxy phenyl) cyclobutadienediylium-1,3-diolate. The extremely different optical responses were found to arise from two molecular singlet transitions of essentially long axis polarization. Successful application of a four oscillator molecular exciton–polariton theory required the use of point charge densities rather than point dipoles in an extension of the theory which employed both interactions between the two singlets as well as a frequency dependent lattice damping. An intermolecular charge transfer transition is also assigned. The Journal of Chemical Physics is copyrighted by The …

I. A Temperature Dependent Nmr Study Of 6,6-Dicarbethoxy-5,5-Dideuteodi-Benzo--[A,C]-[L, 3]-Cycloheptadiene Ii. The Synthesis Of Four Deuterated Analogs Of 6, 6-Dicarbethoxydibenzo-[A,C]-[1,3]-Cycloheptadiene, Patrick F. Jonas

Masters Theses

The kinetics of conformational interchange of 6,6-dicarbethoxydi-benzo- a,c - 1,3 -cyloheptadiene and its 5,5-dideuterated analog were studied using variable temperature NMR techniques. The free energy of activation for conformational interchange of the parent compound was found to be 9.02 kcal mol^-1 and that of the 5,5-dideuterated analog to be 9.42 kcal mol^-1. Values of the entropy of activation were found to be -19.91 e. u. and -18.12 e. u. respectively. The spectra were recorded on a Nicolet NMC-360 wide bore spectrometer and the data collected treated as an AB spin system.

The 4,8-dideutero, 4,5,5,8-tetradeutero and 5,5,7,7-tetradeutero analogs …

Naphthalene-2,3-Dialdehyde: A Synthon To 7,9-Polymethylene-8h-Cyclohepta[B]Naphthalene-8-One And A Study Of Their Aromaticity, Edward O. Crapps

Dissertations

This report describes the synthesis of naphthalene-2,3-dialdehyde, and an analytical method for determining its purity by thin layer chromatography. Subsequently, the dialdehyde was condensed with various cyclic ketones to generate a series of polymethylene bridged naphthotropones. It was found that planarity and aromaticity increase with the size of the methylene bridge, although, the bridge must contain six or more methylene groups for the latter to be true. The claim for aromaticity is supported by NMR and IR data, which indicates the positive charge for a perchlorate cation salt is delocalized over the naphthalene and tropone ring system. Furthermore, from the …

Use Of Ft-Ir And Nmr Spectra Of The Thf Extracts Of Mid-Rank Bituminous Coals To Predict Plasticity, Samuel Adesoji Irefin

Masters Theses & Specialist Projects

Plasticity, which typically develops at 380-420°C, is a unique property of mid-ranked coals. The phenomenon of plasticity in coals has been known for a long time but is still poorly understood. Even among coals of identical subrank and chemical composition, large differences in plastic behavior are commonly encountered. Plastic coals go through a softening and swelling state upon heating before they resolidify. Concurrent with the plastic state of the coal, thermal decomposition of the coal takes place.

The coking ability of a coal can be directly related to the plasticity of the coal. In liquefaction reactions, plastic coals tend to …

Impact Of Several Chemical And Physical Properties Of Two H-Coal Recycle Solvent Streams On Their Relative Solvent Quality, Joe Collins

Masters Theses & Specialist Projects

The purpose of this study was to follow the solvent quality curve of the recycle solvent streams of the H-Coal Pilot Plant run by Ashland Petroleum Company at Catlettsburg, Kentucky. This was done with the use of a microautoclave (shaker-bomb liquefaction unit). Several physical and chemical properties of these recycle oils were determined, and these values were correlated with the observed solvent quality. It is shown that the relative, solvent quality of these recycle oils correlate well with many of the chemical and some of the physical properties determined in this study.

Modulated Piezoreflectivity And The Photoelasticity Of Molecular Crystals, T. Luty, Craig J. Eckhardt

Craig J. Eckhardt Publications

Analysis of the optical response of a molecular crystal undergoing an external, periodic modulation is presented in terms of classical dipole theory. The case of modulated strain is treated in particular and identification of such strain with acoustic phonons with q=0 permits use of lattice dynamical theory to elucidate the acoustic phonon–exciton interaction. It is shown that extrema in the piezomodulated reflectivity (PMR) locate transverse and longitudinal exciton–polariton frequencies under specific experimental conditions. Model calculations demonstrate the great difference in the PMR for strong and weakly coupled systems. Relation of the PMR intensity to the elasto-optic coefficients and the storage …

Ab Initio Studies Of Hxypo And Xypoh Molecules, Mark S. Gordon, Jerry A. Boatz, Michael W. Schmidt

Mark S. Gordon

Molecular orbital calculations have been carried out on a sequence of HXYPOH molecules, with X and Y = H, CH3, NH2, OH, OCH3, and F. The molecular structures are predicted with the ST0-2G* basis set. For the prediction of energies of isomerization to XYPOH species, single-point 3-21G* and 6-31G* calculations were used. The molecular dissociation energies of HXYPO to HPO + XY and to XPO + HY were calculated by augmenting the latter two basis sets with MP2 and MP3 perturbation corrections.

Hydrogen Abstractions By Triplet Methylene And Silylene, Mark S. Gordon

Mark S. Gordon

While the most common reactions of singlet methylenes are insertions into Y -H or multiple bonds, 1-3 triplet methylenes tend to abstract hydrogens from Y -H bonds. 1·2 Singlet silylenes are also known to insert,4-6 while little is known about the corresponding triplets. Several theoretical papers have been devoted to analyses of the insertions of singlet CH/-12 and SiHP-15 into a variety of bonds and the abstractions of hydrogen from H216-20 and CH417 by triplet methylene. Ab initio calculations including correlation predict that carbenes insert into Y-H9•11 ·12·15 bonds with no barrier, in agreement with the prevailing experimental evidence;1·2 however, …

Centers Of Polymer Research; Polymer Science In Czechoslovakia, Slovakia Ii: Universities And Research Institutes, Otto Vogl, E. Borsig, J. Beniska

Otto Vogl

No abstract provided.

The Nature Of Supported Co-Mo And Ni-W And Hydrodenitrogenation And Hydrodesulfurization Of Model Compounds, Eric Dadey

Masters Theses & Specialist Projects

The catalytic vapor-phase isomerization, hydrogenolysis, and/or disproportionation of trimethylbenzen (TMB) over Co-Mo/Al₂O₃ and Ni-W/Al₂O₃ was studied at 480°C, 400 psi reactor pressure, and a constant H₂ flow. Each catalyst was run in the reduced or sulfided form. The results show a marked difference in the product distributions for each catalyst, which is attributed to differences in the catalysts’ acidities.

The hydrodenitrogenation (HDN) of quinolone and the hydrodesulfurization (HDS) of benzothiophene were also studied. The compounds were reacted in a 1 liter autoclave at 325°C and varying partial pressures of H₂. The …

Determination Of The Internal Rotational Energy Of Gaseous 1,2-Dichloroethane In An Argon Matrix Using Fourier Transform Spectroscopy, Susan Lynn Clarke

Chemistry & Biochemistry Theses & Dissertations

A sample cell and delivery system for rapid matrix isolation of gas mixtures at constant gas temperature was designed and evaluated. The rotational energy differences of 1,2-dichlorosthane and of its deuterium compound wars then determined to test this technique.

The rotational energy barriers calculated from Boltzman plots of ths gases at different temperatures were; 1.21 + 0.38 keel/mole, 1.33 + 0.70 Real/mole, and 1.12 + 0.45 kcal/mole for the CH2 wagging„ C-Cl stretching and CD₂ wagging modes respectively. These values were in good agreement with previously published values.

These results allowed evaluation of this apparatus and experimental design and …

Characterization Of Trihalomethane Formation From Proteins In Chlorinated Water, Robert Aaron Kravitz

Chemistry & Biochemistry Theses & Dissertations

Traditionally humates have been considered the most significant precursor in the formation of trihalomethanes in finished drinking water. This study investigates another potential precursor, namely proteins. The chlorination of aqueous protein solutions yields significant levels of trihalomethanes in terms of the maximum contaminant level (MCL) of 0.100 mg/L imposed by the USEPA. Molar yields for several proteins were determined. The average yield per unit of organic carbon was 0.5% as compared to 0.8% for a humic acid studied. A model protein, bovine serum albumin, was studied extensively to ascertain the effects of total organic carbon, chlorine dose, and time on …

Centers Of Polymer Research; Polymer Science In Czechoslovakia: Slovakia I: Polymer Institute, Slovak Academy Of Sciences, Bratislava, Otto Vogl, A. Romanov, E. Borsig

Otto Vogl

No abstract provided.

Multiplicities For Evaporative 4he Emission In Heavy Ion Reactions: Relationships To Spin And Lifetime Expectancy Of The Composite Nucleus, N. N. Ajitanand, John M. Alexander, H. Delagrange, E. Duek, D. Ø. Eriksen, D. Guerreau, Morton Kaplan, M. Kildir, L. Kowalski, R. Lacey, D. Logan, D. J. Moses, Graham F. Peaslee, Louis C. Vaz, M. S. Zisman

Faculty Publications

Multiplicities are compared for4He evaporation in reactions of40Ar and56Fe projectiles (8.5 MeV/u) with withnatAg and238U targets. Coincidence requirements involving fusion-fission and projectile-like fragments have been used to select separate entrance-channel spin zones. Evaporation-like4He emission from the composite nuclei is shown to be large for mean spins ≦100ℏ, and to decrease dramatically with increasing spin. Coincidence measurements between two4He particles have also been studied for40Ar+natAg. This requirement is shown to select reactions that lead to evaporation residues and therefore to a zone of relatively low spin. The shapes of the4He spectra provide an interesting probe of the mechanism and also of …

The Magnitude Of Charge Effects On The Fluorescence Quenching Of Peptidyl Tryptophan By Iodide, James L. Danziger

Honors Theses

The magnitude of charge effects on the quenching of tryptophan containing peptides by Iodine is compared for those peptides containing a positvely charged tryptophan to those peptides containing a negatively or uncharged tryptophan.

The Development Of An Optical Ph Sensor Based On Fluorescence, Kimberley Ann Forbes

Honors Theses

We are interested in developing optical pH sensors based on the fluorescence of an immobilized fluorophor confined on the end of a bifurcated fiber optic. Such optical pH sensors have several potential advantages: they should be inherently less sensitive to electrical noise than conventional pH electro1es, they require no reference electrode, and they make possible remote measurements. The fluorophors evaluated are bound electrostatically to an ion exchange membrane which is then attached to the common end of a bifurcated fiber optic, The fluorophor is excited through one arm and the fluorescence emission is passed through the other arm of the …

The Preparation Of Cyclic Organic Carbonyl Compounds From Ƞ5-Cyclopentadienyltetracarbonylvanadium And Substituted Acetylenes, Ronald C. Newbold

Honors Theses

Studies on the reactivity of many transition metal carbonyl complexes with various acetylenes have generated significant interest in the field of organometallic chemistry, but little effort has been put forth to make use of these compounds as genuine organic reagents. Most metal carbonyl compounds generate both organic and organometallic products, where oxidative cleavage becomes necessary to obtain the organic moiety. (35-c5H5)v(CO)4 is an oxygen-sensitive carbonyl complex which has been shown to thermally react with bis-(pentafluoro­phenyl)acetylene to produce cyclic carbonyl compounds in high yield, particularly the quinone derivative, with few organometallic products. The thermal reactivity of (35-c5H5)v(CO)4 is characterized with various …

Determination Of Aldehydes In Ambient Air By High Performance Liquid Chromatography With Fluorescence Detection, Carol B. Berman

Honors Theses

Two methods for the determination of aldehydes in ambient air were investigated. The methods involved derivatization of the aldehydes by 2-diphenylacetyl-1,3-indandione-1-hydrazone (DAIH) and 1-dimethylaminoaphthalene-5-sulfonylhydrazine (dansylhydrazine) in acetonitrile solution. The deriviatives were then separated by high performance liquid chromatography and detected and quantified by flourescence detection. The DAIH method was found to be unsuitable and was therefore abandoned. The dansyl hydrazine method was found to be a potentially uncomplicated, rapid, and senstitive procedure for the detection of aldehydes.

Conformational Energy Calculations On Valinomycin, Rachel J. Cohen

Honors Theses

The antibiotic action of the ionophore valinomycin is a result of its ability to preferentially bind potassium ions and transport them across cellular membranes. Complexation is solely due to the molecular structure of this cyclic depsipeptide. In solution, the molecule exists in different conformers depending upon solvent polarity. Exact knowledge as to the structure of valinomycin in the aqueous and lipid cellular layers is thus difficult to determine. Many spectral studies of valinomycin have been undertaken utilizing a variety of instrumental methods and conformations existing in different solvents have been proposed. We have performed energy minimization procedures on these structures. …