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1998

Selected Works

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Articles 1 - 28 of 28

Full-Text Articles in Chemistry

22. Yu Tongyin, Otto Vogl, Shukuan Fu Dec 1998

22. Yu Tongyin, Otto Vogl, Shukuan Fu

Otto Vogl

No abstract provided.


International Symposium On Ionic Polymerization Ip'97, Otto Vogl, Przemyslaw Kubisa Dec 1998

International Symposium On Ionic Polymerization Ip'97, Otto Vogl, Przemyslaw Kubisa

Otto Vogl

No abstract provided.


12th Bratislava Conference On Polymers: Modified Polyolefins For Advanced Polymeric Materials, Otto Vogl, Pavol Hrdlovic Nov 1998

12th Bratislava Conference On Polymers: Modified Polyolefins For Advanced Polymeric Materials, Otto Vogl, Pavol Hrdlovic

Otto Vogl

No abstract provided.


23. Feng Xinde, Otto Vogl, Zhou Qifen Nov 1998

23. Feng Xinde, Otto Vogl, Zhou Qifen

Otto Vogl

No abstract provided.


24. Bahattin M. Baysal, Otto Vogl, Elif Hamurcu Oct 1998

24. Bahattin M. Baysal, Otto Vogl, Elif Hamurcu

Otto Vogl

No abstract provided.


5th Pacific Polymer Conference, Kyongju, Korea, Otto Vogl, Sun Chul Kim Oct 1998

5th Pacific Polymer Conference, Kyongju, Korea, Otto Vogl, Sun Chul Kim

Otto Vogl

No abstract provided.


25. Hiroyuki Tadokoro, Otto Vogl, Kohji Tashiro Sep 1998

25. Hiroyuki Tadokoro, Otto Vogl, Kohji Tashiro

Otto Vogl

No abstract provided.


26. Itaru Mita, Otto Vogl Aug 1998

26. Itaru Mita, Otto Vogl

Otto Vogl

No abstract provided.


2-Phenyl-3-(5,6,7,7a-Tetrahydro-1h,3h-Pyrrolo[1,2-C]Oxazol-3-Ylidene)-1-Propene-1,1-Dicarbonitrile And 4-(4-Methoxyphenyl)-2,6-Bis(Methylthio)Pyridine-3-Carbonitrile, M. George, S. Das, C.V. Ashokan, N.P. Rath, M.V. George Jul 1998

2-Phenyl-3-(5,6,7,7a-Tetrahydro-1h,3h-Pyrrolo[1,2-C]Oxazol-3-Ylidene)-1-Propene-1,1-Dicarbonitrile And 4-(4-Methoxyphenyl)-2,6-Bis(Methylthio)Pyridine-3-Carbonitrile, M. George, S. Das, C.V. Ashokan, N.P. Rath, M.V. George

Nigam Rath

The reaction of 3-aryl-2-cyano-5,5-bis(methylthio)penta-2,4-dienenitrile, (1), with (L)-(-)-2-hydroxymethylpyrrolidine, (2), gave two types of product, the normal substitution product, (3), and a pyridine derivative, (4). The structures of two representative examples, 2-phenyl-3-(5,6,7,7a-tetrahydro1H,3H-pyrrolo[1,2-c]oxazol-3-ylidene)-1-propene-1,1-dicarbonitrile, (3a), as its hemibenzene solvate, C17H14N3O.0.5C6H6, and 4-(4-methoxyphenyl)-2,6-bis(methylthio)pyridine-3-carbonitrile, (4b), C15H14N2OS2, have been unambiguously established by X-ray crystallographic analysis. The molecular packing of (4b) involves loosly held dimers with S1...S1' distances of 3.424 (1) Å.


27. Per Flodin, Otto Vogl, Kerstin Meijer-Flodin Jul 1998

27. Per Flodin, Otto Vogl, Kerstin Meijer-Flodin

Otto Vogl

No abstract provided.


28. Vivian Stannett, Otto Vogl, Susanne S. Stannett Jun 1998

28. Vivian Stannett, Otto Vogl, Susanne S. Stannett

Otto Vogl

No abstract provided.


29. Motowo Takayanagi, Otto Vogl, Tisoro Kajiyama May 1998

29. Motowo Takayanagi, Otto Vogl, Tisoro Kajiyama

Otto Vogl

No abstract provided.


30. Manfred Raetzsch, Otto Vogl Apr 1998

30. Manfred Raetzsch, Otto Vogl

Otto Vogl

No abstract provided.


Sublimation Enthalpies At 298.15 K Using Correlation Gas Chromatography And Differential Scanning Calorimetry Measurements, James Chickos, Donald Hesse, Sarah Hosseini, Gary Nichols, Paul Webb Mar 1998

Sublimation Enthalpies At 298.15 K Using Correlation Gas Chromatography And Differential Scanning Calorimetry Measurements, James Chickos, Donald Hesse, Sarah Hosseini, Gary Nichols, Paul Webb

James Chickos

No abstract provided.


31. Yoshio Iwakura, Otto Vogl, Seiichi Nakahama Mar 1998

31. Yoshio Iwakura, Otto Vogl, Seiichi Nakahama

Otto Vogl

No abstract provided.


A Protocol For Correcting Experimental Fusion Enthalpies To 298.15 K And It's Application In Indirect Measurements Of Sublimation Enthalpy At 298.15 K, James S. Chickos Feb 1998

A Protocol For Correcting Experimental Fusion Enthalpies To 298.15 K And It's Application In Indirect Measurements Of Sublimation Enthalpy At 298.15 K, James S. Chickos

James Chickos

No abstract provided.


Cyclic Deformation Behavior Of High-Purity Titanium Single Crystals: Part Ii. Microstructure And Mechanism, Xiaoli Tan, H. Guo, H. Gu, C. Laird, N. D. H. Monroe Feb 1998

Cyclic Deformation Behavior Of High-Purity Titanium Single Crystals: Part Ii. Microstructure And Mechanism, Xiaoli Tan, H. Guo, H. Gu, C. Laird, N. D. H. Monroe

Xiaoli Tan

Strain-controlled cyclic tests have been conducted on high-purity titanium single crystals with different orientations. The fatigue mechanisms of the titanium crystals were studied by means of a scanning electron microscope (SEM) and a transmission electron microscope (TEM). It was found that single slip lines, wavy slip lines, double slip lines, twins, and associated slip lines occurred in differently oriented single crystals. A new type of fractographic morphology, parallel traces, was observed. Dislocation patterns and cyclic twins, as well as the mechanical response, were analyzed. The dependence of the deformation mechanisms on the orientations of the single crystals is discussed.


Cyclic Deformation Behavior Of High-Purity Titanium Single Crystals: Part I. Orientation Dependence Of Stress-Strain Response, Xiaoli Tan, H. Gu, C. Laird, N. D. H. Monroe Feb 1998

Cyclic Deformation Behavior Of High-Purity Titanium Single Crystals: Part I. Orientation Dependence Of Stress-Strain Response, Xiaoli Tan, H. Gu, C. Laird, N. D. H. Monroe

Xiaoli Tan

Randomly oriented single crystals of high-purity titanium were prepared by strain annealing and were subjected to multiple-step fatigue testing under strain-controlled conditions, in order to determine their cyclic stress-strain curves (CSSCs). These were found to fall into three groups, depending on orientation and the extent of slip and twinning. For those crystals oriented for single prismatic slip, a plateau was observed in the CSSCs, persistent slip bands (PSBs) occurred, and the plateau stress was 38 MPa. In a second group, oriented for prismatic slip but for which cross-slip and twinning was favored, the plateau was suppressed and the flow stresses …


32. Ian Macmillan Ward, Otto Vogl Feb 1998

32. Ian Macmillan Ward, Otto Vogl

Otto Vogl

No abstract provided.


Mass Transfer With Chemical Reaction In The Process Of Ammonia Desorption From Aqueous Solutions Containing Carbon Dioxide, Wojciech M. Budzianowski Jan 1998

Mass Transfer With Chemical Reaction In The Process Of Ammonia Desorption From Aqueous Solutions Containing Carbon Dioxide, Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.


Archiv Der Pharmazie, Philadelphia University Jan 1998

Archiv Der Pharmazie, Philadelphia University

Philadelphia University, Jordan

No abstract provided.


Simulation And Fpga Implementation Of A Simple Computer, Philadelphia University Jan 1998

Simulation And Fpga Implementation Of A Simple Computer, Philadelphia University

Philadelphia University, Jordan

No abstract provided.


Computational Evidence For A Free Silylium Ion, Thomas Müller, Yan Zhao, Joseph B. Lambert Jan 1998

Computational Evidence For A Free Silylium Ion, Thomas Müller, Yan Zhao, Joseph B. Lambert

Yan Zhao

Ab initio calculations are the method of choice to gain an insight into the structure and properties of silylium ions, especially when an X-ray structure cannot be obtained, as in the case of trimesitylsilylium (1). The computed structures and properties of triarylsilylium ions suggest that 1 is the first free silylium ion prepared in the condensed phase.


Overcoming The Multiplex‐Disadvantage Using Maximum‐Likelihood Inversion, Stephen E. Bialkowski Jan 1998

Overcoming The Multiplex‐Disadvantage Using Maximum‐Likelihood Inversion, Stephen E. Bialkowski

Stephen E. Bialkowski

A maximum-likelihood estimator, derived under quantum-noiselimited measurement conditions, is used to obtain wavenumber-ordered spectra produced by a model Michelson interferometer. The estimator is tested on a number of synthetic interferograms, and results are compared to similar spectra obtained by using the Fourier (cosine) transform. It is found that the maximum-likelihood inversion method does not result in white noise in the spectrum estimate when the spectrum is sparse. It thus may be used to circumvent the main disadvantage in multiplexed spectrometer measurements using quantum-noise-limited detectors for emissionbased measurements. It is also found that maximum-likelihood inversion methods can be used to obtain …


33. Noburo Yamazaki, Otto Vogl, Seiichi Nakahama Jan 1998

33. Noburo Yamazaki, Otto Vogl, Seiichi Nakahama

Otto Vogl

No abstract provided.


Ionic Hydrogen Bonds In Bioenergetics. 3. Proton Transport In Membranes, Modeled By Ketone/Water Clusters, Michael Meot-Ner, Steve Scheiner, Edward Yu Jan 1998

Ionic Hydrogen Bonds In Bioenergetics. 3. Proton Transport In Membranes, Modeled By Ketone/Water Clusters, Michael Meot-Ner, Steve Scheiner, Edward Yu

Edward Yu

Hydrogen bond networks in protonated acetone/water clusters are stabilized by H3O+(Me2CO)2 centers, and the stabilizaton increases with further acetone content. For example, proton transfer from neat water (H2O)6H+ clusters to form mixed (Me2CO)3(H2O)3H+ clusters is exothermic by 80 kJ/mol (19 kcal/mol), due to strong hydrogen bonding of the carbonyl groups; in a series of mixed clusters B3(H2O)3H+, the stability of the hydrogen bond network correlates with the proton affinities PA(B). In diketone models of adjacent peptide links, the proton is stabilized by internal hydrogen bonds between the carbonyl groups. The internal bonds can be significant, for example, 31 kJ/mol (7 …


Radicals, Metals And Magnetism, David J R Brook Jan 1998

Radicals, Metals And Magnetism, David J R Brook

David J. R. Brook

The interaction between unpaired electrons governs many physical properties of materials. Although in a fundamental sense the interaction is simple, a full understanding of the interaction in molecular systems is complicated by the presence of other bonding and non-bonding electrons. The resulting many body problem is very challenging. Nevertheless, much qualitative understanding can be obtained from applying simple molecular orbital theory and considering only the partly filled orbitals. The resulting model can be used to describe existing diradical and metal-radical systems and also has predicative value in the search for molecular magnets and design of nanoscale devices.


Exo- And Endo-Tricarbonyl[(4b,5,6,7,8,8a-Η)-Cis-N-Methyl-2,3,4,4a,9,9a-Hexahydro-1h- Carbazole]Chromium(0), Nigam Rath, F. Christopher Pigge, Shiyue Fang Dec 1997

Exo- And Endo-Tricarbonyl[(4b,5,6,7,8,8a-Η)-Cis-N-Methyl-2,3,4,4a,9,9a-Hexahydro-1h- Carbazole]Chromium(0), Nigam Rath, F. Christopher Pigge, Shiyue Fang

Nigam Rath

Acid-mediated hydride reduction of tricarbonyl([eta]6-N-methyl-1,2,3,4-tetrahydrocarbazole)chromium(0) affords either the cis-fused exo-hexahydrocarbazole chromium(0) complex {[Cr(C13H17N)(CO)3], (I)} exclusively, or a separable mixture of (I) and the endo-isomer {[Cr(C13H17N)(CO)3], (II)}, depending upon the choice of hydride donor. The conformations of the hexahydrocarbazole systems differ in the orientation of the indoline moiety with respect to the saturated hexahydrocarbazole rings. The isolation of the exo isomer is unusual, as this complex arises via reaction at the sterically more hindered endo face of the coordinated ligand.