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Articles 1 - 30 of 96
Full-Text Articles in Physical Sciences and Mathematics
Detection Of Alzheimer's Disease And Other Diseases Using An Improved Photoaffinity Labeling Method, Boyd E. Haley
Detection Of Alzheimer's Disease And Other Diseases Using An Improved Photoaffinity Labeling Method, Boyd E. Haley
Chemistry Faculty Patents
A method for diagnosing a neurological disease comprising detecting a neurological disease-specific biochemical marker macromolecule within a sample of extracted cerebral spinal fluid is disclosed. In particular, a radioactively labeled photoaffinity probe is used to diagnose a neurological disease. For instance, Alzheimer's disease can be diagnosed by detecting a disease-specific protein having a molecular weight of about 42,000 daltons, i.e., glutamine synthetase.
Polymer Science At The Kyoto Institute Of Technology, Kyoto, Japan, Otto Vogl, Shinzo Kohjiya, Takeo Araki
Polymer Science At The Kyoto Institute Of Technology, Kyoto, Japan, Otto Vogl, Shinzo Kohjiya, Takeo Araki
Emeritus Faculty Author Gallery
No abstract provided.
Advances In Degradable Polymers, Otto Vogl, Andrea Eckert
Advances In Degradable Polymers, Otto Vogl, Andrea Eckert
Emeritus Faculty Author Gallery
No abstract provided.
66. In Memoriam Herman F. Mark, Otto Vogl, Marcel Dekker
66. In Memoriam Herman F. Mark, Otto Vogl, Marcel Dekker
Emeritus Faculty Author Gallery
No abstract provided.
Neutron-Diffraction And Mössbauer-Effect Studies Of Pr₂(Fe₁₋ₓmnₓ)₁₄B, Oran Allan Pringle, Jie Fu, Gary J. Long, William Joseph James, Decai Xie, William B. Yelon, Fernande Grandjean
Neutron-Diffraction And Mössbauer-Effect Studies Of Pr₂(Fe₁₋ₓmnₓ)₁₄B, Oran Allan Pringle, Jie Fu, Gary J. Long, William Joseph James, Decai Xie, William B. Yelon, Fernande Grandjean
Physics Faculty Research & Creative Works
A neutron-diffraction investigation of a series of Pr2(Fe 1-xMnx)14B samples, with x values of 0.00, 0.11, 0.22, 0.30, and 0.35, reveals a preference for the manganese to occupy the 8j2 transition-metal site,the transition-metal site with the largest Wigner-Seitz cell volume. Similar site occupancies have been reported previously for Er2(Fe1-xMnx) 14B and Y2(Fe1-xMnx) 14B. An analysis of the 295-K Mössbauer spectrum of Pr2(Fe0.89Mn0.11)14B indicates that the internal hyperfine fields on the …
Coal Sulfur Forms Determination Using Thermal Analysis Methods, Bucheng Wang
Coal Sulfur Forms Determination Using Thermal Analysis Methods, Bucheng Wang
Masters Theses & Specialist Projects
By optimizing parameters including temperature, reaction time, reagent concentration and pressure, the optimum conditions for the mild oxydesulfurization of coals were determined to be 150°C-200"C and 10 atmospheres oxygen in aqueous slurries of coal reacted with 1 M NH4OH for 1.5-2 hours. The total amount of sulfur removed from -60 mesh coals ranges from 51% to 78% with a mean of 64%, while the amount of inorganic sulfur removed from the coals ranged from 66% to 91% with a mean of 77%. The amount of organic sulfur removed from the samples ranged from 36% to 50% with a …
Monte Carlo Simulation Of The Solid To Super Liquid Phase Transition Of Langmuir Monolayers Using Cross-Section Potentials, D.R. Swanson, Robert J. Hardy, Craig J. Eckhardt
Monte Carlo Simulation Of The Solid To Super Liquid Phase Transition Of Langmuir Monolayers Using Cross-Section Potentials, D.R. Swanson, Robert J. Hardy, Craig J. Eckhardt
Craig J. Eckhardt Publications
A cross-section potential which models the interaction of two planar objects of prescribed shape is developed and used to model the interactions of amphiphiles in vertical phases of Langmuir monolayers. The results of Monte Carlo simulations of an isobaric-isothermal ensemble show qualitative agreement with experiment. The model system undergoes a continuous, bound-to-free rotator transition between phases of the same symmetries as the solid (S) and super liquid (LS) phases exhibited by fatty acid films.
Polymer Science In Milano - Italy, Otto Vogl, Lido Porri, Mario Farina, Guido Audisio
Polymer Science In Milano - Italy, Otto Vogl, Lido Porri, Mario Farina, Guido Audisio
Emeritus Faculty Author Gallery
No abstract provided.
Iupac Symposium On Ring Opening Polymerization '92, Warsaw, Poland, July 7-11, 1992, Otto Vogl, Zbigniew Florjanczyk
Iupac Symposium On Ring Opening Polymerization '92, Warsaw, Poland, July 7-11, 1992, Otto Vogl, Zbigniew Florjanczyk
Emeritus Faculty Author Gallery
No abstract provided.
67. In Memoriam Hermann F. Mark, Otto Vogl
67. In Memoriam Hermann F. Mark, Otto Vogl
Emeritus Faculty Author Gallery
No abstract provided.
Piezomodulated-Raman-Spectroscopy Study Of The Phase Transition In Phenothiazine, J. Sartwell, Craig J. Eckhardt
Piezomodulated-Raman-Spectroscopy Study Of The Phase Transition In Phenothiazine, J. Sartwell, Craig J. Eckhardt
Craig J. Eckhardt Publications
Single crystals of phenothiazine undergo a displacive order-disorder phase transition near 250 K. The microscopic mechanism of this transition is not clear owing to the complexity of a disordered lattice and the lack of direct mode-anharmonicity data. Unstable optical modes have been observed in phenothiazine and are regarded as coupled, by symmetry, to an acoustic mode that becomes overdamped through the phase transition. The latter is considered to have the primary role in the phase transition. This premise is in doubt, however, based on the optical-mode anharmonicity directly observed by uniaxial-piezomodulation-Raman-spectroscopy results presented here. Anharmonic responses are observed in the …
Brillouin-Scattering Study Of The Elastic Constants Of Phenothiazine Through The Phase Transition, J. Sartwell, Craig J. Eckhardt
Brillouin-Scattering Study Of The Elastic Constants Of Phenothiazine Through The Phase Transition, J. Sartwell, Craig J. Eckhardt
Craig J. Eckhardt Publications
It has been proposed that single crystals of phenothiazine undergo a proper ferroelastic phase transition: Pnma(D2h)→P21/c (C2h). This premise is in conflict with Brillouin-scattering studies from both quasi- and high-symmetry longitudinal and transverse acoustic modes reported here. The C55 elastic constant of phenothiazine as an orthorhombic crystal at ambient conditions shows no temperature dependence. The inelastic, light-scattering spectra support an order-disorder phase transition; no significantly unstable acoustic phonons were observed through the phase transition. Laser diffraction from structural domains reveals that the crystal is polysynthetically …
Neutron-Diffraction And Mössbauer Effect Study Of The Preferential Silicon Site Occupation And Magnetic Structure Of Nd₂Fe₁₄₋ₓsiₓb, Gaya Kanishka Marasinghe, Oran Allan Pringle, Gary J. Long, William Joseph James, Dianne J. Xiao, J. L. Li, William B. Yelon, Fernande Grandjean
Neutron-Diffraction And Mössbauer Effect Study Of The Preferential Silicon Site Occupation And Magnetic Structure Of Nd₂Fe₁₄₋ₓsiₓb, Gaya Kanishka Marasinghe, Oran Allan Pringle, Gary J. Long, William Joseph James, Dianne J. Xiao, J. L. Li, William B. Yelon, Fernande Grandjean
Physics Faculty Research & Creative Works
A neutron-diffraction study of Nd2Fe14-xSixB has shown that silicon preferentially occupies the 4c site in the transition-metal sublattice in Nd2Fe14B. Silicon also exhibits a moderate preference for the 8j1 site, is almost excluded from the 16k2 site, and avoids the 16k1, 8j2, and 4e sites. The silicon site occupancy is correlated with a preference for a silicon atom to have rare-earth atoms in its coordination environment. The Mössbauer spectra of Nd2Fe14-xSixB have been fit with a model which …
The Development Of New Methods For Coal Sulfer Forms & Sulfur In Ash Determination, Robert Forsythe
The Development Of New Methods For Coal Sulfer Forms & Sulfur In Ash Determination, Robert Forsythe
Masters Theses & Specialist Projects
The development of new procedures to determine the amount and/or types of sulfur in coal and coal products is an ongoing process for coal scientists This development is driven by the problems and inconveniences of the current ASTM methods In this thesis, the work done at Western Kentucky University in the development of two new sulfur determination procedures will be described. The first procedure can be used as an alternative method for coal sulfur forms analysis with results comparable to the ASTM method. This procedure involves heating the coal samples at 365°C and 440°C for thirty minutes to selectively remove …
Interaction Of Cationic Porphyrins With Dna, Ulrica Sehlstedt, Pamela Carter, Jerry Goodisman, James C. Dabrowiak, Seog K. Kim
Interaction Of Cationic Porphyrins With Dna, Ulrica Sehlstedt, Pamela Carter, Jerry Goodisman, James C. Dabrowiak, Seog K. Kim
Chemistry - All Scholarship
Utilizing linear dichroism (LD), circular dichroism (CD), and fluorescence energy transfer, the binding geometries of a series of Co3+-porphyrins and their free ligands were examined. The compounds studied were Co-meso-tetrakis(N-methylpyridinium-4-yl)porphyi(nC oTMPyP) and its free ligand (H2- TMPyP), Co-meso-tetrakis(N-n-butylpyridinium-4-yl)porphyrin( CoTBPyP) and its free ligand (H2TBPyP), and Co-meso-tetrakis(N-n-octylpyridinium-4-yl)porphyrin (CoTOPyP). The two non-metalloporphyrins exhibit negative LD, having angles of roughly 75' relative to the DNA helix axis. They also display negative CD and a significant contact energy transfer from the DNA bases. On the other hand, the three metalloporphyrins display orientation angles of roughly 45' between the porphyrin plane and the helix axis …
Purification And Characterization Of A Gamma-Like Dna-Polymerase From Chenopodium Album L., K. Meißner, Sabine Heinhorst, Gordon C. Cannon, T. Börner
Purification And Characterization Of A Gamma-Like Dna-Polymerase From Chenopodium Album L., K. Meißner, Sabine Heinhorst, Gordon C. Cannon, T. Börner
Faculty Publications
A DNA polymerase activity from mitochondria of the dicotyledonous angiosperm Chenopodium album L. was purified almost 9000 fold by successive column chromatography steps on DEAE cellulose, heparin agarose and ssDNA cellulose. The enzyme was characterized as a gamma-class polymerase, based on its resistance to inhibitors of the nuclear DNA polymerase alpha and its preference for poly(rA).(dT)12-18 over activated DNA in vitro. The molecular weight was estimated to be 80,000 - 90,000. A 3' to 5' exonuclease activity was found to be tightly associated with the DNA polymerase activity through all purification steps. This is the first report of an association …
Investigation Of The Β-Γ Phase Transition In Single Crystal Malononitrile By Polarized Raman Spectroscopy, S.J. Bonafede, Craig J. Eckhardt
Investigation Of The Β-Γ Phase Transition In Single Crystal Malononitrile By Polarized Raman Spectroscopy, S.J. Bonafede, Craig J. Eckhardt
Craig J. Eckhardt Publications
Temperature dependent, polarized Raman spectra in the lattice mode region for sublimed, single crystal malononitrile through the β-γ phase transition (Tc=294.7 K) are reported. Symmetry assignments and frequencies of vibrational modes are made and compared to previous studies. Nine out of 12 possible lattice modes are observed in each phase with three of the observed modes being affected by the phase transition. The temperature dependence of these three affected modes is attributed to cyano group and molecular dipole interactions between molecules in the crystal. The behavior of malononitrile through the β-γ phase transition is analogous to the …
Polymer Science And Technology For The 21sth Century, Gerald S. Kirshenbaum, Eli M. Pearce
Polymer Science And Technology For The 21sth Century, Gerald S. Kirshenbaum, Eli M. Pearce
Emeritus Faculty Author Gallery
No abstract provided.
68. Polymers To The Year 2000 And Beyond, Otto Vogl, Herman Mark
68. Polymers To The Year 2000 And Beyond, Otto Vogl, Herman Mark
Emeritus Faculty Author Gallery
No abstract provided.
Polymer Science At Kyoto University, Kyoto, Japan, Otto Vogl
Polymer Science At Kyoto University, Kyoto, Japan, Otto Vogl
Emeritus Faculty Author Gallery
No abstract provided.
Separation And Characterization Of Components Of Catalytic Cracker Feed Using Centrifugal Partition Chromatography, Randy A. Menges, Daniel W. Armstrong, Larry A. Spino
Separation And Characterization Of Components Of Catalytic Cracker Feed Using Centrifugal Partition Chromatography, Randy A. Menges, Daniel W. Armstrong, Larry A. Spino
Chemistry Faculty Research & Creative Works
Centrifugal partition chromatography (CPC) was used to fractionate a catalytic-cracking feedstock (i.e., catalytic cracker feed) into 16 separate fractions in the descending mode and 5 fractions in the inverse or ascending mode. Each fraction was analyzed by UV, fluorescence, and synchronous luminescence (SL) spectroscopy as well as by gas chromatography/mass spectrometry (GC/MS). It appeared that CPC can be used to fractionate larger samples of this type and with a greater degree of selectivity than previously reported preparative HPLC approaches. The SL spectra tended to be much more useful and information rich for these complex mixtures as compared to UV or …
Polymer Science In Austria Ii: Universities In Vienna, Otto Vogl, Josef Schurz
Polymer Science In Austria Ii: Universities In Vienna, Otto Vogl, Josef Schurz
Emeritus Faculty Author Gallery
No abstract provided.
69. Nachruf Hermann F. Mark,, Otto Vogl
69. Nachruf Hermann F. Mark,, Otto Vogl
Emeritus Faculty Author Gallery
No abstract provided.
Temporary Negative-Ion Resonances In The Nio(100) High-Resolution Electron-Energy-Loss Spectrum , K.W. Wulser, Marjorie Langell
Temporary Negative-Ion Resonances In The Nio(100) High-Resolution Electron-Energy-Loss Spectrum , K.W. Wulser, Marjorie Langell
Marjorie A. Langell Publications
The NiO(100) Fuchs-Kliewer phonon spectrum has been investigated by high-resolution electron-energy-loss spectroscopy (HREELS) at beam energies of 0.8–17 eV and the intensity distribution of the phonons relative to the dielectric properties of the NiO substrate has been considered. Over most of the range, the spectrum is well behaved, with the single-loss phonon energy at -70.5 meV and multiple excitations decreasing according to the predicted Poisson distribution. At 5.0-, 8.5-, and 13.5-eV primary beam energies, however, a substantial resonant enhancement in the phonon cross section is observed. The enhancement is accompanied by a shift from the Poisson intensity distribution to favor …
Distance Dependence Of Nonadiabaticity In The Branching Between C–Br And C–Cl Bond Fission Following 1[N(O),Π∗(C=O)] Excitation In Bromopropionyl Chloride, P. W. Kash, G.C.G. Waschewsky, L. J. Butler, Michelle M. Francl
Distance Dependence Of Nonadiabaticity In The Branching Between C–Br And C–Cl Bond Fission Following 1[N(O),Π∗(C=O)] Excitation In Bromopropionyl Chloride, P. W. Kash, G.C.G. Waschewsky, L. J. Butler, Michelle M. Francl
Chemistry Faculty Research and Scholarship
These experiments on bromopropionyl chloride investigate a system in which the barrier to C-Br fission on the lowest 1A'' potential energy surface is formed from a weakly avoided electronic configuration crossing, so that nonadiabatic recrossing of the barrier to C-Br fission dramatically reduces the branching to C-Br fission. The results, when compared with earlier branching ratio measurements on bromoacetyl chloride, show that the additional intervening CH2 spacer in bromopropionyl chloride reduces the splitting between the adiabatic potential energy surfaces at the barrier to C-Br fission, further suppressing C-Br fission by over an order of magnitude. The experiment measures the photofragment …
The 2′-Phosphate Of Nadp Is Critical For Optimum Productive Binding To 6-Phosphogluconate Dehydrogenase From Candida Utilis, Anthony J. Berdis, Paul F. Cook
The 2′-Phosphate Of Nadp Is Critical For Optimum Productive Binding To 6-Phosphogluconate Dehydrogenase From Candida Utilis, Anthony J. Berdis, Paul F. Cook
Chemistry Faculty Publications
Initial velocity studies obtained with alternative dinucleotide substrates for the 6-phosphogluconate dehydrogenase reaction suggest that the 2′-phosphate is critical for the optimum productive binding of the dinucleotide substrate. Initial velocity patterns obtained by varying 6-phosphogluconate at different fixed levels of NAD are nearly parallel with apparent competitive substrate inhibition by 6-phosphogluconate at pH 7 and below but intersect to the left of the ordinate at pH 8 and above. Dead-end inhibition studies indicate that the mechanism is random at all pH values. Data are interpreted in terms of a random mechanism with marked antagonism in the binding of NAD and …
Polymer Science In Austria Iii, Universities In Linz, Innsbruck And Other Research Institute In Austria Including Industry, Otto Vogl, Josef Schurz
Polymer Science In Austria Iii, Universities In Linz, Innsbruck And Other Research Institute In Austria Including Industry, Otto Vogl, Josef Schurz
Emeritus Faculty Author Gallery
No abstract provided.
Observation Of Non-Isotropic Auger Angular Distribution In The C(1s) Shape Resonance Of Co, Oliver Hemmers, Franz Heiser, J. Eiben, R. Wehlitz, U. Becker
Observation Of Non-Isotropic Auger Angular Distribution In The C(1s) Shape Resonance Of Co, Oliver Hemmers, Franz Heiser, J. Eiben, R. Wehlitz, U. Becker
Environmental Studies Faculty Publications
Angle-resolved high-resolution C(KVV) Auger spectra of CO were taken in the vicinity of the C(1s) σ* shape resonance. These spectra show clear evidence for the theoretically predicted anisotropic K-shell Auger emission in molecules. Complementary results from angle-resolved photoion spectroscopy show that the small size of the observed effect is, besides the varying intrinsic anisotropy of the Auger decay, also due to a smaller anisotropy in the primary absorption process than originally predicted but in good agreement with more recent calculations. Contrary to this, satellite Auger transitions show unexpectedly large anisotropies.
Radially Symmetrical Flow Of Reacting Liquid With Changing Viscosity, S.E. Solovyov, V.A. Volpert, S.P. Davytan
Radially Symmetrical Flow Of Reacting Liquid With Changing Viscosity, S.E. Solovyov, V.A. Volpert, S.P. Davytan
Faculty Publications
Frontal regimens for one-dimensional flow of reacting liquid with changing viscosity are studied. Stationary solutions are investigated for the case of narrow reaction zones that shrink to a front. The results of numerical solution of the nonstationary problem are presented. Complex oscillations resulting from period-doubling bifurcations are found.
Orientational Phase Transition In Na_{X}C_{60} (1, T. Yildirim, J. E. Fischer, A. B. Harris, Peter W. Stephens, Dengfa Liu, Laurent Brard, Robert M. Strongin, Amos B. Smith Iii
Orientational Phase Transition In Na_{X}C_{60} (1, T. Yildirim, J. E. Fischer, A. B. Harris, Peter W. Stephens, Dengfa Liu, Laurent Brard, Robert M. Strongin, Amos B. Smith Iii
Chemistry Faculty Publications and Presentations
X-ray diffraction and calorimetry data on cubic NaxC60(1<x60, e.g., Tm(x=1.3)=325 K. The ordered phases are the same as in pure C60: simple cubic, space group Pa3¯, but the orientations in the disordered phase are more restricted. We explain how Na stabilizes the ordered phase to rather high T, while K and Rb do not, in terms of Coulomb interactions between C60 molecules and and Na ions which we calculate from the local charge density of C60.