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

Displaying records 21 to 30 of 122 records.
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21. 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

22. 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

23. 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

24. 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

25. 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

26. 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

27. 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

28. 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

29. 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

30. Discriminating the states of matter in metallic nanoparticle transformations: What are we missing?
Topic: Chemical Analysis
Published: 2/20/2013
Authors: John M Pettibone, Julien C. Gigault, Vincent A Hackley
Abstract: A limiting factor in assessing the risk of current and emerging nanomaterials in biological and environmental systems is the ability to accurately detect and characterize their size, shape and composition in broad distributions and complex media. Asy ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913009



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