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Displaying records 41 to 50 of 800 records.
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41. 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 ...

42. 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 ...

43. 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 ...

44. 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 ...

45. 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 ...

46. 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 ...

47. 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 A Wise

48. 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 ...

49. Writing Guidelines to Develop an Memorandum of Understanding for Interoperable Automated Fingerprint Identification Systems
Series: Special Publication (NIST SP)
Report Number: 1156
Topic: Chemistry
Published: 5/14/2013
Authors: Susan M Ballou, Michael D Garris, Anthony Clay, Joi Dickerson, Peter T Higgins, Lisa Jackson, Joe Morrissey, Beth Owens, Joe Polski, Janet Hoin, Leo Norton, Melissa K Taylor
Abstract: This is one of a series of documents prepared by the Latent Print Automated Fingerprint Identification System (AFIS) Interoperability Working Group. The purpose of these documents is to provide guidance and a framework to those involved in the id ...

50. Structure and Stability of SnO2 Nanocrystals and Surface-Bound Water Species
Topic: Chemistry
Published: 5/8/2013
Authors: Rick L Paul, Hsiu-Wen Wang, David J Wesolowski, Thomas E Proffen, Lucus Vicek, Wei Wang, Lawrence F Allard, Alexander I. Kolesnikov, Mikhail Feygenson, Lawrence M. Anovitz
Abstract: The structure of SnO2 nanoparticles (avg. 5 nm diameter) with a few layers of water on the surface has been elucidated by atomic pair distribution function (PDF) methods using in situ neutron total scattering data and molecular dynamics (MD) simulati ...

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