Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Leonard J. Chyall"'
Autor:
Simon Bates, Christine Schertz, David Jonaitis, Leonard J. Chyall, Jeanette T. Dunlap, Aeri Park, Rex Shipplett, Scott L. Childs, Barbara C. Stahly
Publikováno v:
Expert Opinion on Drug Discovery. 2:145-154
Modern drug development demands constant deployment of more effective technologies to mitigate the high cost of bringing new drugs to market. In addition to cost savings, new technologies can improve all aspects of pharmaceutical development. New tec
Autor:
Leonard J. Chyall, Richard H. Harris, Jeffrey W. Gilman, Takashi Kashiwagi, Alexander B. Morgan
Publikováno v:
Fire and Materials. 26:247-253
Polymer layered-silicate (clay) nanocomposites have not only the unique advantage of reduced flammability, but also improved mechanical properties. This is a key advantage over many flame retardants, which reduce flammability but also reduce the mech
Publikováno v:
Crystal Growth & Design. 2:505-510
Crystallization studies of nabumetone (4-(6-methoxy-2-naphthalenyl)-2-butanone) performed in capillary tubes yielded a metastable polymorph. The single-crystal X-ray structure of this high-energy form is presented and compared to the structure of the
Publikováno v:
Journal of the American Society for Mass Spectrometry. 10:896-906
The gas phase synthesis, structure, and reactivity of distonic negative ions of the “ate” class are described. “Ate”-class negative ions are readily prepared in the gas phase by addition of neutral Lewis acids, such as BF3, BH3, and AlMe3, to
Publikováno v:
Tetrahedron Letters. 39:5459-5462
Derivatives of trans -bicyclo[4.1.0]hept-3-ene with chlorine and bromine substituents the 7 position were synthesized and their thermal rearrangements were examined. Thermolysis of the dichloride leads to the formation of the cis-fused isomer, while
Autor:
Robert R. Squires, Lee S. Sunderlin, Brian T. Hill, John C. Poutsma, Leonard J. Chyall, Jun Hu, Randal A. Seburg
Publikováno v:
Rapid Communications in Mass Spectrometry. 11:489-493
The design and implementation of a simple electrospray ionization source for a flowing afterglow/triple quadrupole device are described. Ions can be electrosprayed directly into the room temperature flow tube through a heated capillary without the ne
Publikováno v:
The Journal of Physical Chemistry. 100:6608-6611
The homolytic Se−H bond energy of benzeneselenol, a very efficient radical trap in solution and in the gas phase, was determined experimentally by using two independent approaches in a Fourier-transform ion cyclotron resonance mass spectrometer. Th
Autor:
Leonard J. Chyall, Robert R. Squires
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. :257-266
The proton affinity and absolute heat of formation of cyclopropenylidene (c-C 3 H 2 ) have been derived from the translational energy threshold for endothermic proton transfer from c-C 3 H 3 + to ammonia in a flowing afterglow triple quadrupole instr
Publikováno v:
Journal of the American Chemical Society. 117:4374-4378
Autor:
Hilkka I. Kenttämaa, Leonard J. Chyall
Publikováno v:
Journal of Mass Spectrometry. 30:81-87
Collisional activation of protonated 2-, 3- and 4-iodoanilines in a dual-cell Fourier transform ion cyclotron resonance spectrometer results in the loss of an iodine atom to yield product ions of m/z 93. Ion–molecule reactions and energy-resolved c