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Chemistry

Analytical chemistry

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Displaying 1501 - 1525 of 2095

New NIST Sediment SRM for Inorganic Analysis

March 1, 2004

Author(s)

Rolf L. Zeisler

Polybrominated Diphenyl Ether Congeners and Toxaphene in Selected Marine Standard Reference Materials

March 1, 2004

Author(s)

John R. Kucklick, K. J. Tuerk, Stacy S. Vander-Pol, Michele M. Schantz, Stephen A. Wise

Standard Reference Materials (SRMs) for the Calibration and Validation of Analytical Methods for PCBs (As Aroclor Mixtures)

March 1, 2004

Author(s)

Dianne L. Poster, Michele M. Schantz, Stefan D. Leigh, Stephen A. Wise

Three New Mussel Tissue Standard Reference Materials (SRMs) for the Determination of Organic Contaminants

March 1, 2004

Author(s)

Dianne L. Poster, Michele M. Schantz, John R. Kucklick, M. J. Lopez de Alda, Barbara J. Porter, Rebecca S. Pugh, Stephen A. Wise

Two New Marine Sediment Standard Reference Materials (SRMs) for the Determination of Organic Contaminants

March 1, 2004

Author(s)

Stephen A. Wise, Dianne L. Poster, Michele M. Schantz, John R. Kucklick, Lane C. Sander, M. J. Lopez de Alda, Patricia Schubert, Reenie M. Parris, Barbara J. Porter

Valence Electron Orbitals of an Oligo(p-phenylene-ethynylene)thiol on Gold

March 1, 2004

Author(s)

Christopher D. Zangmeister, Steven W. Robey, Roger D. van Zee, Yuxing Yao, J M. Tour

One- and two-photon photoemission spectra have been measured for monolayers of oligo(para-phenylene-ethynylene) thiolate chemisorbed on gold surfaces. Within 5 eV of the Fermi level, four states are observed, two occupied (2.0 eV and 4.0 eV below the Fermi

High-Resolution Cavity Ring-Down Spectroscopy of H216O at 10687.36 cm-1

February 11, 2004

Author(s)

Joseph T. Hodges

We describe a frequency-stabilized cavity ring-down spectroscopy apparatus enabling high-resolution line shape measurements of water vapor. The measured line strength and broadening parameter for the H216O transition at 10687.36 cm-1 are compared to

FT IR Studies of C 30 Self-Assembled Monolayers on Silica, Titania, and Zirconia

February 4, 2004

Author(s)

G Srinivasan, M. Pursch, Lane C. Sander, K Muller

Binding of Lithium and Boron to Human Plasma Proteins II: Results for a Bipolar Not on Lithium Therapy

February 1, 2004

Author(s)

W B. Clarke, R Guscott, Richard M. Lindstrom

We report further measurements of lithium and boron bound to human plasma proteins using the techniques of gel chromatography, thermal-neutron activation, and high-sensitivity helium isotope mass spectrometry. The plasma sample was donated by a bipolar

Endogenous Lithium and Boron Red Cell-Plasma Ratios: Normal Subjects versus Bipolar Patients Not on Lithium Therapy

February 1, 2004

Author(s)

W B. Clarke, R Guscott, Robert G. Downing, Richard M. Lindstrom

Development and Evaluation of a Candidate Reference Method for the Determination of Total Cortisol in Human Serum Using Isotope Dilution Liquid Chromatography/Mass Spectrometry and Liquid Chromatography/Tandem Mass Spectrometry

January 16, 2004

Author(s)

Susan S. Tai, Michael J. Welch

Achieving multi-frequency state entanglement with ultra-slow multi-wave mixing

January 1, 2004

Author(s)

Y Wu, Lu Deng

We propose a scheme to achieve the entanglement of N photon modes (frequency modes) with perfectly efficient ultraslow multiwave mixing in a cold atomic medium. In addition, the method provides an efficient approach to realizing frequency tunability.

Chemometric Studies of Polycyclic Aromatic Hydrocarbon Shape Selectivity in Reversed-Phase Liquid Chromatography

January 1, 2004

Author(s)

Katrice A. Lippa, Lane C. Sander, Stephen A. Wise

Liquid Chromatographic Method for the Determination of Enantiomeric Composition of Amphetamine and Methamphetamine in Hair Samples

January 1, 2004

Author(s)

Karen W. Phinney, Lane C. Sander

Magnetoconductivity Tensor Analysis of Anomalous Transport Effects in Neutron Irradiated HgCdTe Epilayers

January 1, 2004

Author(s)

W Zhao, R Lukic-Zrnic, B P. Gorman, R L. Cottier, T D. Golding, C L. Littler, J H. Dinan, Richard M. Lindstrom, H F. Schaake, P Liao

Persistent Organic Pollutants in Rough-Toothed Dolphins (Steno bredanensis) Sampled During an Unusual Mass Stranding Event

January 1, 2004

Author(s)

W D. Struntz, John R. Kucklick, Michele M. Schantz, Paul R. Becker, W E. McFee, M K. Stolen

The Use of MALDI-TOF MS and 1H NMR as Complimentary Methods for Confirming Composition and Purity of Hydrogel Prepolymers

January 1, 2004

Author(s)

Sheng Lin-Gibson

Ionization Chamber Measurements of the Half-lives of 24 Na, 42 K, 76 As and 198 Au

December 29, 2003

Author(s)

M P. Unterweger, Richard M. Lindstrom

CCQM-K11: The Determination of Glucose in Serum

December 1, 2003

Author(s)

Michael J. Welch, Lorna T. Sniegoski, Reenie M. Parris, Willie E. May, G S. Heo, A. Henrion

CCQM-K12: The Determination of Creatinine in Serum

December 1, 2003

Author(s)

Michael J. Welch, C.P. Phinney, Reenie M. Parris, Willie E. May, G S. Heo, A. Henrion, G O'Conner, Heinz Schimmel

Inhibiting the Onset of the Three-Photon Destructive Interference in Ultra-Slow Propagation Enhanced Four-Wave Mixing with Dual Induced Transparency

December 1, 2003

Author(s)

Lu Deng, Marvin G. Payne

We propose a dual electromagnetically induced transparency (EIT) based multiwave mixing scheme that retains the significantly enhanced conversion efficiency enabled by ultraslow propagation of pump waves, yet is also capable of inhibiting and delaying the

Quantum Mirages in Scanning Tunneling Spectroscopy of Kondo Adsorbates: Vibrational Signatures

December 1, 2003

Author(s)

John William Gadzuk, M Plihal

Scanning tunneling microscopy/spectroscopy on Kondo systems consisting of magnetic atoms adsorbed upon non-magnetic metal surfaces has demonstrated the ability of suitable two-dimensional nanostructures (such as quantum corrals) to influence the surface

Reference Materials

November 1, 2003

Author(s)

Rolf L. Zeisler, G L. Molnar

Value Assignment of Nutrient and Aflatoxin Concentrations in Standard Reference Material 2387 Peanut Butter

October 3, 2003

Author(s)

Katherine E. Sharpless, C. S. Phinney, Laura J. Wood, James H. Yen, D W. Howell

Quantum Entanglement of Fock States with Perfectly Efficient Ultraslow Single-Probe Photon Four-Wave Mixing

September 18, 2003

Author(s)

Lu Deng, M. G. Payne

We propose a method to achieve quantum entanglement of two Fock states with perfectly efficient, ultraslow propagation enhanced four-wave mixing. A cold atomic medium is illuminated with a twomode cw control laser to produce coherent mixtures of excited

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