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Topic Area: Chemistry
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Displaying records 971 to 980 of 1000 records.
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971. Prompt-Gamma Activation Analysis using the k^d0^ Approach
Topic: Chemistry
Published: 8/1/1998
Authors: G L Molnar, Z S Revay, Rick L Paul, Richard Mark Lindstrom

972. Propagation of Errors in the Precision and Accuracy of Quantitative Electron Microbeam Analysis
Topic: Chemistry
Published: 8/1/2001
Author: J T. Armstrong

973. Properties for Accurate Gas Flow Measurements
Topic: Chemistry
Published: 10/15/2010
Author: John D Wright
Abstract: Accurate gas properties are needed to take full advantage of the low uncertainties provided by NIST‰s Gas Flow Calibration Services. If a flowmeter user and NIST use different values for these properties (molecular mass, compressibility, density, vis ...

974. Protective performance of environmentally stressed fabrics containing melamine fiber blends
Topic: Chemistry
Published: 1/12/2013
Authors: Shonali Nazare, Shaun M. Flynn, Rick D Davis, Joannie W Chin
Abstract: In this study, environmentally stressed OS fabrics containing melamine fiber blends were evaluated for thermal and mechanical properties that are critical to the protective performance of firefighter turnout gear. Environmental stress factors that a ...

975. Protein Packing Interactions and Polymorphy of Chorismate Lyase From E. Coli
Topic: Chemistry
Published: 11/1/2001
Author: David Travis Gallagher
Abstract: The enzyme chorismate lyase from E. coli crystallizes in three well characterized polymorphs in identical conditions. Wild-type enzyme tends to aggregate, even in the presence of reducing agent, and yields monoclinic crystals that grow in intricat ...

976. Pulse Parameter Dependence on Transition Position and Epoch Duration
Topic: Chemistry
Published: 5/18/2004
Authors: Donald R Larson, Nicholas G Paulter Jr, David I Bergman
Abstract: The pulse parameters of amplitudes and transition duration (10% to 90%) are examined as a function of the epoch and position of the transition edge in the epoch. The primary explanations for the observed variations are the pulse aberrations and the f ...

977. Purity determination as needed for the realisation of primary standards for elemental determination - status of international comparability
Topic: Chemistry
Published: 7/9/2009
Authors: Gregory C Turk, Heinrich Kipphardt, Ralf Matschat, Jochen Vogl, Tamara Gusarova, Michael Czerwensky, Hans-Joachim Heinrich, Akiharu Hioki, Leonid A. Konopelko, Brad Methven, Tsutomu Miura, Ole Petersen, Gundel Riebe, Ralph Sturgeon, Lee Lijian Yu
Abstract: Within the National Metrology Institutes (NMIs) and designated laboratories, an interlaboratory comparison, CCQM-P107, was conducted to verify the degree of international comparability concerning the results of purity analysis. The mass fractions of ...

978. Quality Assurance of Contaminant Measurements in Marine Mammal Tissues
Topic: Chemistry
Published: 9/1/1993
Author: Stephen A Wise

979. Quality Control of PCR Primers Used in Multiplex STR Amplifcation Reactions
Topic: Chemistry
Published: 6/1/2001
Authors: John M Butler, J E Devaney, M A Marino, Peter M Vallone
Abstract: Reliable amplification of short tandem repeat (STR) DNA markers with the polymerase chain reaction (PCR) is dependent on high quality PCR primers. The particular primer combinations and concentrations are especially important with multiplex amplific ...

980. Quantifying Residual Stress Development and Reserve Strength in Restrained Internally Cured Concrete
Topic: Chemistry
Published: 1/1/2013
Authors: John Schlitter, Dale P Bentz, Jason Weiss
Abstract: Concrete can develop tensile stress when it is restrained from shrinking freely. Standard tests, like the restrained ring test (ASTM C1581-09) can be used to quantify how likely a mixture may be to crack under constant temperature conditions. The s ...

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