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Displaying 7726 - 7750 of 143780

Recertification of the SRM 1483a, a Polyethylene

October 12, 2021
Author(s)
Kathleen M. Flynn, William R. Blair
The recertification of a narrow molecular weight distribution poly(ethylene) Standard Reference Material, SRM 1483a, is described. Studies by size exclusion chromatography to obtain the bottle-to-bottle homogeneity are described. The intrinsic viscosity at

Reciprocal Space Neutron Imaging

October 12, 2021
Author(s)
D A. Pushin, D G. Cory, Muhammad D. Arif, David L. Jacobson, M Huber
Here we introduce a Fourier based method for phase contrast neutron imag-ing, report its experimental implementation, show results for a 1-D test phan-tom, and outline the reconstruction methodology. This new approach makes useof neutron interferometry to

Recommendations for Improving Serum Creatinine Measurement: A Report From the Laboratory Working Group of the National Kidney Disease Education Program

October 12, 2021
Author(s)
Gary L. Myers, W. G. Miller, J Coresh, J Fleming, Neil Greenberg, T Greene, T Hostetter, A S. Levey, Mauro Panteghini, Michael J. Welch, John H. Eckfeldt
Background:The National Kidney Disease Education Program (NKDEP) has promulgated suggestions for diagnosing and treating chronic kidney disease (CKD). The National Kidney Foundation s Kidney Disease Outcomes Quality Initiative (K/DOQI) has issued clinical

Recommended Dose Calculation Formalisms and Consensus Dosimetry Parameters for Intravascular Brachytherapy Dosimetry: An Update of the 1999 AAPM Task Group 60 Report

October 12, 2021
Author(s)
Sou-Tung Chiu-Tsao, Dennis Schaart, Christopher G. Soares, Ravinder Nath
Since the publication of AAPM Task Group 60 report in 1999, a considerable amount of dosimetry data for the three coronary brachytherapy systems in use in the United States has been reported. A subgroup of the AAPM working group on Unconventional

Recovery of Forming Gas Damaged Pb(Nb,Zr,Ti)O 3 Capacitors

October 12, 2021
Author(s)
S Aggarwal, S R. Perusse, C J. Kerr, R Ramesh, D B. Romero, J T. Evans, L Boyer, J Velasquez
We report on the recovery of fully integrated Pb(Nb,Zr,Ti)O 3 ferroelectric capacitors damaged during forming gas (4% H 2, balance N 2) annealing. In such capacitors oxygen loss, lead loss and hydrogen incorporation are three degradation mechanisms that

Recrystallization Texture and Magnetic Properties of Electrodeposited FePt on Cu(001)

October 12, 2021
Author(s)
Erik B. Svedberg, J Mallett, S Sayan, Alexander J. Shapiro, William F. Egelhoff Jr., Thomas P. Moffat
A near equiatomic FePt fcc alloy has been grown by electrodeposition onto Cu(001). Annealing at 450 (degrees) C results in the onset of a Al fcc to L1(subscript o) fct phase transformation with a dominant FePt(001) (two vertical lines) Cu(002)

Reference Gauging System for a Small-Scale Liquid Hydrogen Tank

October 12, 2021
Author(s)
N T. Van Dresar, James D. Siegwarth
A system to accurately weigh the fluid contents of a small-scale liquid hydrogen test tank has been experimentally verified. It is intended for use as a reference or benchmark system when testing low-gravity liquid guantity gauging cncepts in the

Relative Permeability Measurements for Metal Detector Research

October 12, 2021
Author(s)
Michael D. Janezic, James R. Baker-Jarvis
We examine a measurement method for characterizing the low-frequency relative permeability of ferromagnetic metals commonly used in contraband materials. Besides the conductivity and geometry, the metal's relative permeability is another important variable

Renewable Standard Reference Material for the Detection of TP53 Mutations

October 12, 2021
Author(s)
C D. O'Connell, L A. Tully, J E. Devaney, M A. Marino, J P. Jakupciak, Donald H. Atha
It is important to have standards for use in mutation detection systems to monitor the sensitivity of mutation detection and the possible introduction of errors during amplification and separation procedures. We have developed 12 plasmid clones containing
Displaying 7726 - 7750 of 143780
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