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Displaying records 61 to 70 of 786 records.
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61. A Humidity Generator for Temperatures to 200 °C and Pressures to 1.6 MPa
Topic: Chemistry
Published: 11/30/2012
Authors: D Vega-Maza, W Wyatt Miller, Dean C Ripple, Gregory E Scace
Abstract: We have constructed a new humidity generator that produces gas streams of known moisture content at temperatures from 85 °C to 200 °C, absolute pressures from 0.2 MPa to 1.6 MPa, and relative humidities from 10 % to 90 %. The generator produces a moi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905234

62. Modeling Chloride transport in Cracked Concrete: A 3-D image-based microstructure simulation
Topic: Chemistry
Published: 10/3/2012
Authors: Edward Joseph Garboczi, Dale P Bentz, Jeffrey M. Davis, Yang Lu
Abstract: The prediction of the service life of concrete materials is difficult, mainly because of their complex heterogeneous microstructure and their random nature. Studying the presence of cracks in concrete and their effect on chloride transport and reacti ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912153

63. Biosynthesis of Athmu, a alpha,gamma-hydroxy-ß-amino acid of pahayokolides A-B
Topic: Chemistry
Published: 10/2/2012
Authors: Li Liu, Daniel W Bearden, Juan C. Rodriguez, Kathleen S. Rein
Abstract: Pahayokolides A-B are cyanobacteria derived non-ribosomal peptides which exhibit cytotoxicity against a number of cancer cell lines. The biosynthetic origin of the 3-amino-2,5,7,8- tetrahydroxy-10-methylundecanoic acid (Athmu) moiety has been inv ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912206

64. A 4:1 transmission-line impedance transformer for broadband superconducting circuits
Topic: Chemistry
Published: 10/1/2012
Authors: Leonardo Matteo Ranzani, Lafe F. Spietz, Jose Alberto Aumentado, Zoya Popovic
Abstract: We present a 4 : 1 superconducting transmission-line impedance transformer for cryogenic applications. The device transforms 25 {Omega} in the coplanar waveguide to 6.25 {Omega} in the microstrip and is designed to operate at 20 mK. Calibrated me ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910366

65. Guidelines for Access Control System Evaluation Metrics
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7874
Topic: Chemistry
Published: 9/14/2012
Authors: Chung Tong Hu, Karen Scarfone
Abstract: The purpose of this document is to provide Federal agencies with background information on access control (AC) properties, and to help access control experts improve their evaluation of the highest security AC systems. This document discusses the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911110

66. Measurement of Scattering Cross Section with a Spectrophotometer with an Integrating Sphere Detector
Series: Journal of Research (NIST JRES)
Report Number: 117.012
Topic: Chemistry
Published: 9/13/2012
Authors: Lili Wang, Steven J Choquette, Yu-Zhong Zhang, Victoria Karpiak, Adolfas Kastytis Gaigalas
Abstract: A commercial spectrometer with an integrating sphere (IS) detector was used to measure the scattering cross section of microspheres. Analysis of the measurement process showed that two measurements of the extinction, one with the cuvette placed i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909272

67. Recommended vapor pressure and thermophysical data for ferrocene
Topic: Chemistry
Published: 8/14/2012
Authors: Michal Fulem, Kvetoslav Ruzicka, Marisa A.A. Rocha, Luis M.N.B.F. Santos, Robert F Berg
Abstract: Recommended vapor pressure data for ferrocene (CAS Registry Number: 102-54-5) in the temperature range from 242 to 447 K were developed by the simultaneous correlation of critically assessed vapor pressures, heat capacities of the crystalline phase a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911175

68. SEABIRD TISSUE ARCHIVAL AND MONITORING PROJECT: Egg Collections and Analytical Results for 2006-2009
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7872
Topic: Chemistry
Published: 8/2/2012
Authors: Stacy S Vander Pol, Paul R Becker, Sylvain Berail, Russell D Day, Olivier F. X. Donard, Keith A. Hobson, Amanda J Moors, Rebecca S Pugh, Lauren B. Rust, David G. Roseneau
Abstract: Since 1999, the Seabird Tissue Archival and Monitoring Project (STAMP) has collected, banked, and analyzed seabird eggs using established protocols to monitor chlorinated pesticides, polychlorinated biphenyls (PCBs), brominated flame retardants, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909692

69. Using Viscosity Modifiers to Reduce Effective Diffusivity in Mortars
Topic: Chemistry
Published: 8/1/2012
Authors: Kenneth Alan Snyder, Dale P Bentz, Jeffrey M. Davis
Abstract: Three viscosity modifiers (a commercial shrinkage-reducing admixture, a polypropylene glycol, and cellulose ether) are used to reduce the effective diffusivity of chloride ions through mortars during a one-year exposure. Two delivery mechanisms ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908267

70. Observing chemical reactions using Transmission Electron Microscopy
Topic: Chemistry
Published: 7/17/2012
Author: Renu Sharma
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905160



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