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You searched on: Topic Area: Chemical Analysis Sorted by: date

Displaying records 21 to 30 of 123 records.
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21. Connection between thermodynamics and dynamics of simple fluids in highly attractive pores
Topic: Chemical Analysis
Published: 10/25/2013
Authors: William P Krekelberg, Vincent K Shen, Daniel W Siderius, Thomas M. Truskett, Jeffrey R. Errington
Abstract: We investigate the structural and diffusive dynamics properties of a model fluid in highly-absorptive cylindrical pores. At subcritical temperatures, self diffusion displays three distinct regimes as a function of average pore density ρ: 1) a de ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914566

22. Spectral line shapes investigation with Pound-Drever-Hall-locked frequency-stabilized cavity ring-down spectroscopy
Topic: Chemical Analysis
Published: 10/23/2013
Authors: A. Cygan, S. Wojtewicz, J. Domyslawska, Piotr Maslowski, Katarzyna Ewelina Bielska, M. Piwinski, K. Stec, R.S. Trawinski, F Ozimek, C. Radzewicz, H Abe, T Ido, Joseph Terence Hodges, D Lisak, R. Ciurylo
Abstract: A review of recent experiments involving a newly developed Pound-Drever-Hall-locked frequency-stabilized cavity ring-down spectroscopy (PDH-locked FS-CRDS) system is presented. By comparison to standard FS-CRDS, the PDH lock of the probe laser to the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913686

23. Determination of Arsenic in Food and Dietary Supplement Standard Reference Materials by Neutron Activation Analysis
Topic: Chemical Analysis
Published: 9/1/2013
Author: Rick L Paul
Abstract: Arsenic has been measured in food and food supplement Standard Reference Materials by neutron activation analysis for the purpose of value-assigning As mass fractions and assessing homogeneity. Instrumental neutron activation analysis (INAA) has been ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910386

24. Effects of incomplete light extinction in frequency-agile, rapid scanning spectroscopy
Topic: Chemical Analysis
Published: 8/1/2013
Authors: David A Long, S. Wojtewicz, Joseph Terence Hodges
Abstract: The effect of finite beam extinction ratio on the precision and accuracy of cavity ring-down decay time constant measurements was examined using the frequency-agile, rapid scanning, cavity ring-down spectroscopy (FARS-CRDS) technique. This new appro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913765

25. Surface mediated assembly of small, metastable gold nanoclusters
Topic: Chemical Analysis
Published: 5/27/2013
Authors: John M Pettibone, William A Osborn, Konrad Rykaczewski, Albert A. Talin, John E Bonevich, Jeffrey W Hudgens
Abstract: The unique properties of metallic nanoclusters are attractive for numerous commercial and industrial applications but are generally less stable than nanocrystals. Thus, developing methodologies for stabilizing nanoclusters and retaining their enhance ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909387

26. The Development and Implementation of Quality Assurance Programs to Support Nutritional Measurements
Topic: Chemical Analysis
Published: 5/24/2013
Authors: Lane C Sander, Mary Bedner, David Lee Duewer, Katrice A Lippa, Melissa Meaney Phillips, Karen W Phinney, Catherine A Rimmer, Michele Miller Schantz, Katherine E Sharpless, Susan Shu Cheng Tai, Jeanice M Brown Thomas, Stephen Albert Wise, Laura J Wood, J. M. Betz, Paul M Coates
Abstract: The National Institute of Standards and Technology administers quality assurance programs devoted to improving measurements of nutrients and related metabolites in foods, dietary supplements, and serum and plasma samples. These programs have been de ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912409

27. DNA Purification From Crude Samples for Human Identification Using Gradient Elution Isotachophoresis
Topic: Chemical Analysis
Published: 5/23/2013
Authors: Elizabeth A Strychalski, Christopher Konek, Erica L Romsos, Peter M Vallone, Alyssa Henry, David J Ross
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913391

28. Differential cavity ring-down spectroscopy
Topic: Chemical Analysis
Published: 5/9/2013
Authors: Jeremie B. Courtois, Katarzyna Ewelina Bielska, Joseph Terence Hodges
Abstract: We present a technique called differential cavity ring-down spectroscopy (D-CRDS) for reducing etaloning effects in a ring-down spectrometer. The method relies on alternately measuring and then subtracting intra-cavity losses associated with pairwi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912785

29. Compositional Analysis and Advanced Distillation Curve for Mixed Alcohols Produced via Syngas on a K-CoMoSx Catalyst
Topic: Chemical Analysis
Published: 4/19/2013
Authors: Jesse E. Hensley, Tara M Lovestead, Earl Christensen, Abhijit Dutta, Thomas J Bruno, Robert McCormick
Abstract: The distillation behavior of mixed alcohols was studied using the Advanced Distillation Curve (ADC) methodology. Crude mixed oxygenates were generated from syngas over a potassium promoted cobalt molybdenum sulfide catalyst and assayed for major and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913235

30. Chemical imaging beyond the diffraction limit using photothermal induced resonance microscopy
Topic: Chemical Analysis
Published: 4/2/2013
Authors: Andrea Centrone, Basudev Lahiri, Glenn E Holland
Abstract: Photo Thermal Induced Resonance (PTIR), recently attracted great interest for enabling chemical identification and imaging with nanoscale resolution. In this paper, the PTIR working principles are reviewed along the main results from a recent publica ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913386



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