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Displaying 1026 - 1050 of 2028

Compressed-Liquid Density Measurements of Methyl Oleate and Methyl Linoleate

September 30, 2011
Author(s)
Stephanie L. Outcalt
Compressed liquid densities of the fatty acid methyl esters methyl linoleate and methyl oleate have been measured with a vibrating-tube densimeter. The temperature and pressure range of the measured data is from 270 K to 470 K, and 0.5 MPa to 50 MPa. The

Reexamination of the C2H3+ microwave and infrared spectra

September 29, 2011
Author(s)
Jon T. Hougen, Laurent H. Coudert
The high-resolution infrared spectrum of C2H3 recorded in the 3 CH stretching region (J. Phys. Chem. 99 (1995) 15611-15623) is re-analyzed using an effective internal axis method (IAM) accounting for the large amplitude hydrogen migration motion. The

Reversed-Flow Chromatographic Determination of Binary Diffusion Coefficients

September 19, 2011
Author(s)
William S. McGivern, Jeffrey A. Manion
A reversed-flow chromatographic apparatus for the measurement of binary diffusion coefficients is described. Hydrocarbons are detected using flame ionization detection, and inert species can be detected by thermal conductivity. We have measured the binary

Construction of a High Power OPO Laser system for Differential Absorption LIDAR

September 13, 2011
Author(s)
Kevin O. Douglass, Stephen E. Maxwell, David F. Plusquellic, Joseph T. Hodges, Roger D. van Zee, Daniel V. Samarov, James R. Whetstone
Our goal is to develop and characterize optical measurement technology to enable accurate quantification of greenhouse-gas emissions to meet the needs of industry and regulators. A 1064 nm pumped high energy optical parametric oscillator (OPO) operating

On the electronic excited state dynamics of vibronic transitions. High resolution electronic spectra of acenaphthene and its argon van der Waals complex in the gas phase.

September 1, 2011
Author(s)
Leonardo Avarez-Valtierra, David F. Plusquellic, John T. Yi, David W. Pratt
Rotationally resolved fluorescence excitation spectroscopy has been used to study the dynamics, electronic distribution, and the relative orientation of the transition moment vector in several vibronic transitions of acenaphthene (ACN) and in its Ar van

Rotationally Resolved C2 Symmetric Conformers of Bis-(4-hydroxyphenyl)methane: Textbook Examples of Excitonic Coupling in the S1 and S2 Electronic States

September 1, 2011
Author(s)
Shin G. Chou, Chirantha P. Rodrigo, Christian Muller, Kevin O. Douglass, Timothy Zwier, David F. Plusquellic
Rotationally resolved microwave and ultraviolet spectra of jet-cooled bis-4 hydroxy)-diphenylmethane (b4HBM) have been obtained using Fourier-transform microwave and UV laser/molecular beam spectrometers. A recent vibronic level study of b4HPM1 has

Development of a Candidate Reference Measurement Procedure for the Determination of Phenytoin, Phenobarbital, Lamotrigine, and Topiramate in Human Serum Using Isotope-Dilution Liquid Chromotography/Tandem Mass Spectrometry

August 28, 2011
Author(s)
Susan Tai, Karen W. Phinney, Chia-Yi Yeh
Phenytoin (PHT), phenobarbital (PHB), lamotrigine (LTG), and topiramate (TPM) are some of the most widely used antiepileptic drugs (AEDs). Monitoring of their concentrations in serum is important for the treatment of epilepsy. A candidate reference

Electron-exchange assisted photon energy up-conversion in thin films of ?-conjugated polymeric composites

August 4, 2011
Author(s)
Panagiotis Keivanidis, Frederic Laquai, Joseph W. Robertson, Baluschev Stanislav, Josemon Jacob, Klaus Mullen, Gerhard Wegner
The mechanism of triplet-triplet annihilation (TTA) induced up-converted delayed luminescence is studied in two different binary organic systems consisting of platinum(II) octaethyl porphyrin mixed with either poly(fluorene) (PF26) or ladder-type

A fitting program for molecules with two inequivalent methyl tops and a plane of symmetry at equilibrium. Application to new microwave and millimeter-wave measurements in methyl acetate

July 25, 2011
Author(s)
Marcela Tudorie, Isabelle Kleiner, Jon T. Hougen, Sonia Melandri, Lilian Sutikdja, Wolfgang Stahl
A program for fitting the high-resolution torsion-rotation spectra of molecules having two inequivalent methyl rotors and a plane of symmetry at equilibrium is described and then applied to methyl acetate [CH3-O-C(=O)-CH3]. The G18 permutation-inversion

In Situ Gas Phase Measurements During Metal Alkylamide Atomic Layer Deposition

July 12, 2011
Author(s)
James E. Maslar, William A. Kimes, Brent A. Sperling
Metal alkylamide compounds, such as tetrakis(ethylmethylamido) hafnium (TEMAH), represent a technologically important class of metalorganic precursors for the deposition of metal oxides and metal nitrides via atomic layer deposition (ALD) or chemical vapor

Evaluating the characteristics of multiwall carbon nanotubes

July 1, 2011
Author(s)
John H. Lehman, M. Terrones, Elisabeth Mansfield, Katie Hurst, Vincent Muenier
During the past 20 years, multiwall carbon nanotubes (MWCNTs) have become an important industrial material. Hundreds of tons are produced each year. This review is a survey of the scientific literature, motivated by industrial requirements and guidelines

Mass Spectrometry Characterization for Chemoenzymatic Glycoprotein Synthesis

July 1, 2011
Author(s)
John E. Schiel, Mark S. Lowenthal, Karen W. Phinney
Glycoproteins exist as heterogeneous mixtures of glycoforms due to glycosylation at multiple sites with various glycans. The glycosylation pattern has significant implications for clinical diagnostics and biopharmaceutical development because it affects

Quantitative Determination of Competitive Molecular Adsorption on Gold Nanoparticles Using Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy

June 28, 2011
Author(s)
De-Hao D. Tsai, Melissa Davila-Morris, Frank W. DelRio, Suvajyoti S. Guha, Vincent A. Hackley, Michael R. Zachariah
Surface-sensitive quantitative studies of competitive molecular adsorption on nanoparticles were conducted using a modified Attenuated attenuated Total total Reflectionreflectance-Fourier Transform transform Infrared infrared (ATR-FTIR) spectroscopy method
Displaying 1026 - 1050 of 2028