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Displaying 301 - 325 of 1412

Radiocarbon Measurements of Black Carbon in Aerosols and Ocean Sediments

March 1, 2002
Author(s)
C A. Masiello, David L. Urban, Lloyd A. Currie
… We report the optimization of dichromate-sulfuric acid oxidation for the measurement of radiocarbon in black … 15 C measurements on the same SRM. Dichromate-sulfuric acid oxidation belongs to the chemical class of black carbon … chemical oxidants. Dilute solutions of dichromate-sulfuric acid degrade black carbon and marine-derived carbon at …

Influence of Indium-Tin Oxide Surface Structure on the Ordering and Coverage of Organosilane, Carboxylic Acid and Thiol Monolayers

May 17, 2007
Author(s)
M Cerruti, C Rhodes, M Losego, A Efremenko, Jon-Paul Maria, Daniel A. Fischer, D L. Feldheim, S Franzen, Jan Genzer
… We report on the formation of organosilane-, carboxylic acid- and thiol-based self assembled monolayers (SAMs) on two … capable of forming well-organized (thiol- and carboxylic acid-based) SAMs. In order to rationalize these observations, … during ITO deposition. Good quality thiol and carboxylic acid SAMs were obtained on one of the ITO substrates prepared …

Crystal Structure of the YchF Protein Reveals Binding Sites for GTP and Nucleic Acid

July 1, 2003
Author(s)
A Teplyakov, G Obmolova, S Y. Chu, J Toedt, E Eisenstein, A J. Howard, G L. Gilliland
… suggests the binding site for a double-stranded nucleic acid in the cleft between the domains. The structure of the … the ability of YchF to bind a double-stranded nucleic acid and GTP. Taken together with other experimental data and … the YchF Protein Reveals Binding Sites for GTP and Nucleic Acid …

The Development and Implementation of Quality Assurance Programs to Support Nutritional Measurements

May 24, 2013
Author(s)
Lane C. Sander, Mary Bedner, David L. Duewer, Katrice A. Lippa, Melissa M. Phillips, Karen W. Phinney, Catherine A. Rimmer, Michele M. Schantz, Katherine E. Sharpless, Susan Tai, Jeanice M. Brown Thomas, Stephen A. Wise, Laura J. Wood, J. M. Betz, Paul M. Coates
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 developed

FTIR measurements of compositional heterogeneities

February 25, 2007
Author(s)
Shuhui Kang, B D. Vogt, Wen-Li Wu, Vivek Prabhu, David L. VanderHart, Ashwin Rao, Eric K. Lin, Karen Turnquest
… process results in the formation of methacrylic acid (MAA)-rich domains. Within these domains, the carboxylic acid groups dimerize through hydrogen bonding. FTIR … heterogeneity, FTIR, LER, LER, line edge roughness, photo acid, photoresist, thin film …

CCQM-P199: Interlaboratory comparability study of HIV-1 RNA copy number quantification

April 13, 2024
Author(s)
Alison Devonshire, Eloise Busby, Gerwyn Jones, Denise O'Sullivan, Ana Fernandez-Gonzalez, Sachie Shibayama, Shin-ichiro Fujii, Megumi Kato, John Emerson Leguizamon Guerrero, Claudia Patricia Tere Pena, Maria Mercedes Arias Cortes, Roberto Becht Flatschart, Marcelo Neves de Medeiros, Antonio Marcos Saraiva, Young-Kyung Bae, Inchul Yang, Hee-Bong Yoo, Alexandra Bogozalec Kosir, Mojca Milavec, Lianhua Dong, Chunyan Niu, Xia Wang, Phattaraporn Morris, Sasithon Temisak, Megan Cleveland, Peter Vallone, Daniel Burke, Michael Forbes-Smith, Jacob McLaughlin, Samreen Falak, Martin Hussels, Rainer Macdonald, Andreas Kummrow, Burhanettin Yalcinkaya, Sema Akyurek, Muslum Akgoz, Maxim Vonsky, Andrey Runov, Simon Cowen, Stephen Nyangoma, Stephen Ellison, Clare Morris, Neil Almond, Jim Huggett
… Committee for Amount of Substance (CCQM) Nucleic Acid analysis Working Group (NAWG), with the aims of … reference measurement procedures for applied viral nucleic acid measurements. Thirteen National Metrology Institutes … dPCR, CCQM, nucleic acid …

Comparative Measures of Single Wall Carbon Nanotube Dispersion

September 14, 2006
Author(s)
Jeffrey A. Fagan, Brian Landi, Idan Mandelbaum, Vardhan Bajpai, Barry J. Bauer, Kalman D. Migler, Jeffrey R. Simpson, Angela R. Hight Walker, Ryan Raffaelle, Erik K. Hobbie
… carbon nanotubes (SWNTs) dispersed in polyacrylic acid are used for a systematic comparison of the different … dispersion, nanotube, neutron scattering, polyarylic acid, polymer …

Analysis of Seafood Reference Materials: RM 8256, RM 8257, RM 8258 and RM 8259

August 30, 2021
Author(s)
Debra Ellisor, Benjamin Place, Melissa M. Phillips, James H. Yen
NIST Reference Material (RM) 8256 Wild-caught Coho Salmon, RM 8257 Aquacultured Coho Salmon, RM 8258 Wild-caught Shrimp and RM 8259 Aquacultured Shrimp were generated for use in authentication, nutrition and food safety-related determinations of crude fat

Role of Nanoparticle Size and Surface Chemistry on Ion Transport and Nanostructure of Perfluorosulfonic Acid Ionomer Nanocomposites

March 7, 2022
Author(s)
Allison Domhoff, Tyler Martin, Eric Davis
… Perfluorosulfonic acid (PFSA) ionomer nanocomposites have emerged as a … diameters from 10 nm to > 1 m and with both sulfonic acid- and amine-functionalized surfaces, were fabricated. … size of the particles was increased, though the sulfonic acid-functionalized particles were seen to be better …

Self-Assembly, Molecular Ordering, and Charge Mobility in Solution-Processed Ultrathin Oligothiophene Films

November 29, 2005
Author(s)
A R. Murphy, Paul C. Chang, Priscilla VanDyke, J Liu, J M. Frechet, V Subramanian, Dean DeLongchamp, S Sambasivan, Daniel A. Fischer, Eric K. Lin
… (T7) oligomers containing thermally removable aliphatic ester solubilizing groups were synthesized, and their UV-vis … increases. A symmetrical ,-substituted sexithiophene (T6-acid) that reveals carboxylic acids after thermolysis was … morphology of the films. Therefore, the T4 and the T6-acid performed poorly because of incomplete surface coverage …

Multi-Scale Phase Separation in Poly(D,L-Lactide-co-glycolide) and Palmitic Acid Blends using Neutron and X-ray Scattering

May 14, 2025
Author(s)
Caitlyn M. Wolf, Robert Dalgliesh, Liliana de Campo, Gregory N. Smith, Kathleen Weigandt
… both synthetic biodegradable polymers, and palmitic acid. We find that phase separation occurs on two different … the growth of nanoscale domains of the dispersed palmitic acid. The multiscale structure in these composite materials … Separation in Poly(D,L-Lactide-co-glycolide) and Palmitic Acid Blends using Neutron and X-ray Scattering …

Terahertz Spectroscopy of Solid Serine and Cysteine

November 10, 2005
Author(s)
Timothy M. Korter, M B. Campbell, M C. Beard, Edwin J. Heilweil
Terahertz (THz) absorption spectra of the amino acids L-serine and L-cysteine in teh solid phase at 77K and 298 K are reported and compared to vibrational spectral results from Density Functional Theory for these species.

High-Throughput Method for Determining Modulus of Polymer Blends

December 1, 2004
Author(s)
Carl G. Simon Jr., Naomi Eidelman, Y N. Deng, N Washburn
… blends. A polymer blend gradient library of poly(L-lactic acid) (PLLA) and poly(D,L-lactic acid) (PDLLA) was created using a three-syringe pump system … high-throughput assay, nanoindentation, poly(lactic acid), polymer blend …

Antibacterial nanocomposites containing amorphous calcium phosphate and silver nanoparticles with different filler levels

May 7, 2012
Author(s)
Lei Cheng, Michael D. Weir, Hockin H. Xu, Joseph M. Antonucci, Nancy Lin, Sheng Lin-Gibson, Sarah M. Xu, Xuedong Zhou
… of calcium (Ca) and phosphate (PO4) ions and possessed acid neutralization capability. There has been little study … using Ag 2-ethylhexanoate salt and 2-(tert-butylamino)ethyl methacrylate, yielding NAg particles of 2.7 nm that … NAg were about 1/4 those of a commercial composite. Lactic acid production on NACP nanocomposite with 0.042 % NAg was …

Characterization of Compositional Heterogeneity in Chemically Amplified Photoresist Polymer Thin Films with Infrared Spectroscopy

February 9, 2007
Author(s)
Shuhui Kang, B D. Vogt, Vivek Prabhu, Eric K. Lin, Wen-Li Wu, David L. VanderHart, Ashwin Rao, Karen Turnquest
… process results in the formation of methacrylic acid (MAA) rich domains. Within these domains, the carboxylic acid groups dimerize through hydrogen bonding. FTIR … carboxylic acid dimer, FTIR, hydrogen bonding, lithography, photoacid, …
Displaying 301 - 325 of 1412
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