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Author: william wallace iii

Displaying records 31 to 40 of 95 records.
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31. Synopsis of the 2004 ASMS Fall Workshop on Polymer Mass Spectrometry
Published: 2/1/2005
Author: William E Wallace III
Abstract: This year s fall workshop of the American Society for Mass Spectrometry was on the topic of synthetic polymer mass spectrometry and was chaired by Robert P. Lattimer (Noveon, Inc.) and Chrys Wesdemiotis (University of Akron, Department of Chemistry). ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852456

32. A Numerical Method for Mass Spectral Data Analysis
Published: 1/31/2005
Authors: Anthony J Kearsley, William E Wallace III, Charles Martin Guttman, Javier Bernal
Abstract: The new generation of mass spectrometers produces an astonishing amount of high-quality data in a brief period of time leading to inevitable data analysis bottlenecks. Automated data analysis algorithms are required for rapid and repeatable processin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150869

33. Analysis by Mass Spectrometry of the Hydrolysis/Condensation Reaction of a Trialkoxysilane in Various Dental Monomer Solutions
Published: 1/1/2005
Authors: M Farahani, William E Wallace III, Joseph M Antonucci, Charles Martin Guttman
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853993

34. An Operator-Independent Approach to Mass Spectral Peak Identification and Integration
Published: 5/1/2004
Authors: William E Wallace III, Anthony J Kearsley, Charles Martin Guttman
Abstract: A mathematical algorithm is presented that accurately locates and calculates the area beneath mass spectral peaks using only reproducible mathematical operations and a NO user-selected sensitivity parameters. This represents a major refinement of la ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852207

35. International Interlaboratory Comparison of Mixtures of Polystyrenes With Different End Groups Obtained by Matrix Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF-MS): Preliminary Results
Published: 1/1/2004
Authors: Charles Martin Guttman, S Wetzel, Kathleen M. Flynn, B M Fanconi, William E Wallace III, David Lloyd VanderHart
Abstract: NIST has sponsored a MALDI-TOF-MS interlaboratory comparison of mixtures of polymers of the same repeat unit with closely matching molecular masses but with different end groups. This interlaboratory comparison was designed to see how well a group of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852364

36. Mass Spectrometry of Synthetic-Polymer Mixtures Workshop.
Published: 1/1/2004
Authors: William E Wallace III, Charles Martin Guttman, S Wetzel, S D Hanton
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853903

37. Recent Advances in Quantitative Synthetic-Polymer Mass Spectrometry at NIST
Published: 1/1/2004
Authors: William E Wallace III, Charles Martin Guttman
Abstract: Commensurate with NIST s mission to advance the state of quantitative measurement science we have worked to develop a method to determine absolute molecular mass distribution of synthetic polymers by mass spectrometry. Work has centered on using mat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852391

38. Understanding and Optimizing the MALDI Process Using a Heated Sample Stage: a 2,5-Dihydroxybenzoic Acid Study
Published: 1/1/2004
Authors: Mark Arnould, William E Wallace III, R Knochenmuss
Abstract: Since its use as a compound for matrix assisted laser desorption/ionization (MALDI), 2,5 dihydroxybenzoic acid (DHB) has been the subject of many solid state and gas phase studies. Here, the temperature of DHB during LD experiments was raised from + ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852390

39. Certification of a Polystyrene Synthetic Polymer, SRM 2888
Series: Special Publication (NIST SP)
Report Number: 260-152
Published: 11/1/2003
Authors: Charles Martin Guttman, William R. Blair, B M Fanconi, R J Goldschmidt, William E Wallace III, S Wetzel, David Lloyd VanderHart
Abstract: The certification of a polystyrene standard reference material, SRM 2888, is described. The M^dw^ of SRM 2888 was determined by light scattering to be 7.19 x 10^u+3^ g/mol with a sample standard deviation of 0.14 x 10^u+3^ g/mol. A combined expanded ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852132

40. A Direct Comparison of Surface and Bulk Chain-Relaxation in Polystyrene
Published: 9/1/2003
Authors: Wen-Li Wu, S Sambasivan, C M Wang, William E Wallace III, Jan Genzer, Daniel A Fischer
Abstract: Near-edge x-ray absorption fine structure (NEXAFS) spectroscopy was used to meausre simultaneously the relaxation rates of polystyrene (PS) molecules at the free surface and in the bulk. The samples were uniaxially stretched and annealed at temperatu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852179



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