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Displaying records 31 to 40 of 99 records.
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31. Effect of oxidation on surface-enhanced Raman scattering activity of silver nanoparticles: a quantitative correlation
Topic: Chemical Analysis
Published: 6/6/2011
Authors: Yun Han, Robert Lupitskyy, Tseng-Ming Chou, Christopher M Stafford, Henry Du, Svetlana Sukhishvili
Abstract: The effect of silver oxidation on surface-enhanced Raman scattering (SERS) was investigated using citrate-reduced silver nanoparticles (Ag NPs) (45-50 nm in diameter) immobilized on glass substrate. Oxidation of Ag NPs was performed in controlled ozo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906745

32. Development of Standard Reference Materials for the Analysis of Dietary Supplements: The Story Continues
Topic: Chemical Analysis
Published: 5/19/2011
Authors: Katherine E Sharpless, Lane C Sander, Stephen A Wise, A. NguyenPho, J. M. Betz
Abstract: In 2004, we published an article in HerbalGram that described a collaboration among the National Institute of Standards and Technology (NIST), the National Institutes of Health, Office of Dietary Supplements (NIH-ODS), and the Food and Drug Administr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906786

33. Comparison of Diesel Fuel Oxygenates with Composition-Explicit Distillation Curve Method Part 1: Linear Compounds with One to Three Oxygens
Topic: Chemical Analysis
Published: 5/2/2011
Authors: Thomas J Bruno, Tara M Lovestead, Jennifer Riggs, Erica Jorgensen, Marcia L Huber
Abstract: There is a great deal of interest in formulating oxygenated diesel fuels that produce low particulate emissions. The most common oxygenating additives for diesel fuels include the glycol ethers, glycol esters, alcohols, ethers and ketones. It is im ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906204

34. Comparison of Diesel Fuel Oxygenates with Composition-Explicit Distillation Curve Method Part 2: Cyclic Compounds with One to Two Oxygens
Topic: Chemical Analysis
Published: 5/2/2011
Authors: Thomas J Bruno, Tara M Lovestead, Marcia L Huber, Jennifer Riggs
Abstract: There is a great deal of interest in formulating oxygenated diesel fuels that produce low particulate emissions. The most common oxygenating additives for diesel fuels include the glycol ethers, glycol esters, alcohols, ethers and ketones. It is im ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907552

35. Advanced Distillation Curve Analysis on Ethyl Levulinate as a Diesel Fuel Oxygenate and a Hybrid Biodiesel Fuel
Topic: Chemical Analysis
Published: 3/10/2011
Authors: Bret Windom, Tara M Lovestead, Mark Mascal, Edward Nikitin, Thomas J Bruno
Abstract: Diminishing petroleum reserves, the potential of supply disruptions, price volatility, as well as environmental considerations resulting from polluting emissions, have led to development of alternative liquid fuels and fuel additives produced from re ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907551

36. Comparison of Biomass-Derived Turbine Fuels with the Composition-Explicit Distillation Curve Method
Topic: Chemical Analysis
Published: 3/6/2011
Authors: Thomas J Bruno, Evgenii Baibourine
Abstract: In recent years, civilian and military users of aviation kerosene have been interested in expanding the scope of fuel feed stocks to include non-petroleum sources. The most well known examples of such alternative sources of fuel are the Fisher-Trops ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906085

37. Improvements in the Measurement of Distillation Curves. 5. Reduced Pressure Advanced Distillation Curve Method
Topic: Chemical Analysis
Published: 1/6/2011
Authors: Bret Windom, Thomas J Bruno
Abstract: The distillation curve is the only practical measurement used to characterize the vapor/liquid equilibrium (volatility) of a complex mixture. In earlier work, we described an improved method and apparatus for distillation curve measurement at atmosph ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906240

38. A calorimetric and equilibrium investigation of the reaction {methyl ferulate(aq) + H2O(l) = methanol(aq) + ferulic acid(aq)}
Topic: Chemical Analysis
Published: 1/3/2011
Authors: Robert Nathan Goldberg, Michael J Selig, Stephen R. Decker, Brian E Lang
Abstract: Microcalorimetry and high-performance liquid chromatography (HPLC) have been used to conduct a thermodynamic investigation of the reaction: {methyl ferulate(aq) + H2O(l) = methanol(aq) + ferulic acid(aq), as catlyzed by feruloyl esterase. Values of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906068

39. Assessment of the Compositional Variability of RP-1 and RP-2 with the Advanced Distillation Curve Approach
Topic: Chemical Analysis
Published: 10/21/2010
Authors: Tara M Lovestead, Bret Windom, Jennifer Riggs, Chris Nickell, Thomas J Bruno
Abstract: RP-1 is a long-established hydrocarbon fuel that continues to be widely used as the kerosene component in rocket propulsion systems. The desire in recent years to use rocket motors many times, rather than a single time, has led to reformulations of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906029

40. Flow Visualization Techniques for the Evaluation of Non-Contact Trace Contraband Detectors
Topic: Chemical Analysis
Published: 8/1/2010
Authors: Matthew E Staymates, Wayne Smith, John G Gillen, Richard T. Lareau, Robert A Fletcher
Abstract: Efforts are underway in the Surface and Microanalysis Science Division at the National Institute of Standards and Technology to study trace aerodynamic sampling of explosive particles using walk-through portal-based detection systems. Explosive trace ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832331



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