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NIST Micronutrients Measurement Quality Assurance Program Winter, Spring, and Fall 1995 Comparability Studies: Results for Round Robins XXXIII, XXXIV, and XXXV Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robins 7 and 8 Ascorbic Acid in H

April 25, 2014
Author(s)
David L. Duewer, Margaret C. Kline, Katherine E. Sharpless, Jeanice M. Brown Thomas, Sam A. Margolis
… Vitamins and Carotenoids in Human Serum, 4) Round Robin 7 Ascorbic Acid in Human Serum, and 5) Round Robin 8 Ascorbic … requested to provide their measurement results by March 20, 1995. The materials for Round Robin XXXIV were shipped to … September 15, 1995. The sample materials for Round Robin 7 were distributed in January 1995 with results due by late …

Molecular Order in High-Efficiency Polymer/Fullerene Bulk Heterojunction Solar Cells

September 22, 2011
Author(s)
Matthew R. Hammond, Regis J. Kline, Andrew A. Herzing, Lee J. Richter, David Germack, Hyun W. Ro, Christopher L. Soles, Daniel A. Fischer, Tao Xu, Luping Yu, Michael F. Toney, Dean M. DeLongchamp
… parameter. This model shows that only a small fraction (≈ 20%) of the polymer in the PTB7/PC71BM blend is ordered. …

Self-Assembly of Dendronized Perylene Bisimides into Complex Helical Columns

June 24, 2011
Author(s)
Virgil Percec, Mihai Peterca, Timur Tadjiev, Xiangbing Zeng, Goran Ungar, Pawaret Leowanawat, Emad Aqad, Mohammad Imam, Brad Rosen, Umit Akbey, Robert Graf, Sivakumar Sekharan, Daniel Sebastiani, Hans -. Spiess, Paul A. Heiney, Steven Hudson
… out on oriented samples with heating and cooling rates of 20 to 0.2 °C/min. At high temperature (3,4,5)12G1-m-PBI …

A gas pressure scale based on primary standard piston gauges

December 6, 2010
Author(s)
Douglas A. Olson, Robert G. Driver, Walter J. Bowers Jr.
… piston gauges are 35.8 mm in diameter and operate from 20 kPa to 1 MPa. Ten secondary standard piston gauges, two … expanded (k=2) uncertainty. Two piston gauges operating to 7 MPa were compared to the 1.4 MPa gauges, and two piston gauges operating to 17 MPa were compared to the 7 MPa gauges. Distortion in the 7 MPa piston gauges was …

The evolving optical frequency comb

October 22, 2010
Author(s)
Scott A. Diddams
… not sprout into its presently-recognized form until nearly 20 years later. Tracing this development from the very first …

yocto-Newton force detection sensitivity using trapped ions

August 22, 2010
Author(s)
Michael J. Biercuk, Joseph W. Britton, Hermann Uys, Aaron Vandevender, John Bollinger
… extract a normalized force detection sensitivity of 50+/-20 yN/ √Hz for n = 1. This result is approximately four …
Displaying 2026 - 2050 of 2522
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