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You searched on: Topic Area: Chemistry

Displaying records 71 to 80 of 847 records.
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71. An Assessment of 25-Hydroxyvitamin D Measurements in Comparability Studies Conducted by the Vitamin D Metabolites Quality Assurance Program
Topic: Chemistry
Published: 8/12/2013
Authors: Mary Bedner, Katrice A Lippa, Susan Shu Cheng Tai
Abstract: Background: The National Institute of Standards and Technology (NIST), in collaboration with the National Institutes of Health Office of Dietary Supplements, established the first accuracy-based program for improving the comparability of vitamin D me ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913070

72. Sensors and Monitoring to Assess Grout and Vault Behavior for Performance Assessments
Topic: Chemistry
Published: 8/12/2013
Authors: Kenneth Alan Snyder, Jason Weiss
Abstract: To support performance assessment (PA) of waste vaults and grout monoliths, the National Institute of Standards and Technology (NIST) has performed a preliminary evaluation of the state-of-the-art of sensors, nondestructive evaluation methods, and an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912401

73. Effects of incomplete light extinction in frequency-agile, rapid scanning spectroscopy
Topic: Chemistry
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

74. Trace water vapor analysis in specialty gases: sensor and spectroscopic approaches
Topic: Chemistry
Published: 7/1/2013
Authors: Kristine A Bertness, Mark W. Raynor, Kevin C Cossel, Florian B. Adler, Jun Ye
Abstract: The analysis of water vapor impurity is important in a number of specialty gas applications. However the main driver for the development and advancement of trace H^u2^O analysis techniques has been the microelectronics industry. The International ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911233

75. On the Field Evaporation Behavior of c-axis GaN Nanowires in Laser-Pulsed Atom Probe Tomography
Topic: Chemistry
Published: 6/26/2013
Authors: Matthew David Brubaker, Kristine A Bertness, Norman A Sanford, Brian Gorman, David R Diercks, R Kirchofer
Abstract: GaN has seen use in many applications such as photovoltaics, blue and ultraviolet lasers, and light-emitting diodes with additional research into expanded and new applications. GaN in the form of nanowires present additional possibilities due to th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913334

76. Formation of Disk- and Stacked Disk-Like Self-Assembled Morphologies from Cholesterol Functionalized Aliphatic Polycarbonate Containing Amphiphilic Diblock Copolymers
Topic: Chemistry
Published: 6/10/2013
Authors: Vivek M Prabhu, Shrinivas Venkataraman, Ashlynn Lee, Yi Yan Yang, James Hedrick, Hareem Maune
Abstract: In this study, a cholesterol functionalized aliphatic cyclic carbonate monomer, 2-(5-methyl-2-oxo-1,3-dioxane-5-carboxyloyloxy)ethyl carbamate (MTC-Chol) was synthesized. The organo-catalytic ring opening polymerization of MTC-Chol was accomplished ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912990

77. Hydrated Phases in Blended Cement Systems and Synthetic Saltstone Grouts
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7947
Topic: Chemistry
Published: 6/10/2013
Authors: Kenneth Alan Snyder, Paul E Stutzman
Abstract: A blended binder system (10 % portland cement, 45 % fly ash, and 45 % slag) is characterized as part of a broader study of its long-term effectiveness in stabilizing treated salt waste at the Savannah River Site. The binder system is reproduced in t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914010

78. Surface mediated assembly of small, metastable gold nanoclusters
Topic: Chemistry
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

79. Standard Reference Materials for Dietary Supplement Analysis
Topic: Chemistry
Published: 5/24/2013
Authors: Catherine A Rimmer, Joseph M Betz, Paul M Coates, Katherine E Sharpless, Stephen Albert Wise
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912493

80. Allele frequencies for 40 autosomal SNP loci typed for US population samples using electrospray ionization mass spectrometry
Topic: Chemistry
Published: 5/20/2013
Authors: Kevin M Kiesler, Peter M Vallone
Abstract: Aim -- To type a set of 194 US African American, Caucasian,and Hispanic samples (self-declared ancestry) for 40 autosomal single nucleotide polymorphism (SNP) markers intended for human identification purposes. Methods -- Genotyping was performed on ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913585



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