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Displaying 3676 - 3700 of 74178

Radio-Frequency Output Coupling of the Bose-Einstein Condensate in Atom Lasers

October 12, 2021
Author(s)
Y B. Band, Paul S. Julienne, M Trippenbach
Experiments have conclusively demonstrated coherence properties of Bose-Einstein condensates [BECs] [1] and the radio-frequency [rf] radiation output coupling of BE condensates [2]. Hence, the concept of an atom laser [3 9] based upon a BEC that is output

Reagentless Cleavage of the Peptide Backbone Using Light-Generated Radicals

October 12, 2021
Author(s)
Barbara J. Jones, Mathew J. Vergne, David M. Bunk, Laurie E. Locascio, M A. Hayes
A key step for protein identification and characterization is cleavage into distinct fragments. All current cleavage methods require the addition of reagents, either proteolytic enzymes or chemical agents, and often a second reagent to discontinue cleavage

Recent Experiments with Bose-Condensed Gases at JILA

October 12, 2021
Author(s)
D S. Hall, J R. Ensher, D S. Jin, M R. Matthews, C E. Wieman, Eric A. Cornell
We consider a binary mixture of two overlapping Bose-Einstein condensates in two different hyperfine states of 87Rb with nearly indentical magnetic moments. Such a system has been simply realized through application of radio frequency and microwave which

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

Representation of Zn(II) Complexes in Polarizable Molecular Mechanics. Further Refinements of the Electrostatic and Short-Range Contribution of the Intermolecular Interaction Energy. Comparisons With Parallel Ab Initio Computations

October 12, 2021
Author(s)
N. Gresh, F M. Piquemal, Morris Krauss
Accurate molecular mechanics potentials are required for the representation of metal binding sites in proteins. These potentials must reproduce accurate quantum mechanics potential energy surfaces. This study is the most recent refinement of the SIBFA (Sum

Resistance Heating of the Gasket in a Gem-Anvil High Pressure Cell

October 12, 2021
Author(s)
N M. Balzaretti, E J. Gonzalez, Gasper J. Piermarini, T Russell
The design and fabrication of a modified gem-anvil high pressure cell capable of statically heating gasketed samples to temperatures in the range of 1100 degrees C at pressures up to 4.0 Gpa is described. The high temperatures were achieved by resistance

Ring-on-Ring Strength Measurements on Rectangular Glass Slides

October 12, 2021
Author(s)
Theo Fett, G Rizzi, J -. Guin, Sheldon M. Wiederhorn
The ring-on-ring test has been standardized and used extensively for strength measurements on glasses and ceramics. The specimen is especially useful to avoid edge defects that often dominate the failure of flexure bars. In this paper, we extend the
Displaying 3676 - 3700 of 74178