Zobrazeno 1 - 10
of 243
pro vyhledávání: '"Keller Ra"'
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 328:235-243
Isotope dilution mass spectrometry using traceable standards as spikes coupled with isotope ratio measurements by thermal ionization or inductively coupled plasma mass spectrometer instruments is the preferred methodology for element content determin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::38b11128c0804b93f1d4f7c3fb1a8e46
https://doi.org/10.1007/s10967-021-07646-7
https://doi.org/10.1007/s10967-021-07646-7
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 318:395-400
Plutonium certified reference materials (CRMs) 136, 137, and 138 were produced, characterized, and certified in the period 1966 through 1971 by the National Bureau of Standards. The thermal ionization mass spectrometry (TIMS) instruments and the anal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::caa4858949498459077c4bf92f92b950
https://doi.org/10.1007/s10967-018-5974-2
https://doi.org/10.1007/s10967-018-5974-2
Autor:
Elmer Lujan, Lisa E Townsend, Lav Tandon, Kevin J. Kuhn, Alexander Martinez, Keller Ra, Lynn A. Foster, Donivan R. Porterfield, Mariam R. Thomas, Khal Spencer, Daniel S. Schwartz, Ning Xu, Lisa Michelle Colletti, Floyd E. Stanley, Benjamin L. Byerly
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 312:95-104
Thorough physical and chemical characterization of plutonium–beryllium (PuBe) neutron sources is an important capability with applications ranging from material accountancy to nuclear forensics. Characterization of PuBe sources is not trivial owing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::499a770e4edd42a5b60a1b7e6d86ea78
https://doi.org/10.1007/s10967-017-5192-3
https://doi.org/10.1007/s10967-017-5192-3
Autor:
K. J. Mathew, Ross W. Williams, Joanna S. Denton, Mariam R. Thomas, Floyd E. Stanley, Tara Mastren, Adrian Nicholl, Andrew J. Gaunt, Keller Ra, Tashi Parsons-Davis, Katherine Garduno, Amy M. Gaffney, William S. Kinman, Josh Wimpenny, Theresa M. Kayzar-Boggs, Klaus Mayer, James Brent Fulwyler, R. E. Steiner, Zsolt Varga, Dana Labotka, Allison Wende, Joel R. Maassen, Jung Rim, Maria Wallenius, Richard A. Torres, Elmer Lujan, Lav Tandon, Kerri C. Treinen, Iain May, John M. Rolison, Donivan R. Porterfield, Chelsea Ottenfeld, J. D. Inglis
Publikováno v:
Analytical chemistry. 91(18)
An intercomparison of the radio-chronometric ages of four distinct plutonium-certified reference materials varying in chemical form, isotopic composition, and period of production are presented. The cross-comparison of the different 234U/238Pu, 235U/
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c2e9684d4ead630e284aa8720e7a7eba
https://pubmed.ncbi.nlm.nih.gov/31418542
https://pubmed.ncbi.nlm.nih.gov/31418542
Autor:
Keller Ra, Benjamin L. Byerly, Floyd E. Stanley, Khalil J. Spencer, Patrick T. Martinez, Ning Xu, Lav Tandon, Mariam R. Thomas, A. C. Hayes-Sterbenz, James Brent Fulwyler, Michael Francis Schappert
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 307:1871-1876
This study presents a method for destructive analysis of irradiated uranium (U) targets, with a focus on collection and measurement of long-lived (t 1/2 > ~10 years) and stable fission product isotopes of ruthenium and cesium. Long-lived and stable i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58f7aa36856c5f37d7fa34cc63c3fff2
https://doi.org/10.1007/s10967-015-4538-y
https://doi.org/10.1007/s10967-015-4538-y
Publikováno v:
Analytical Chemistry. 72:37-41
The rate of detection and sizing of individual fluorescently labeled DNA fragments in conventional single-molecule flow cytometry (SMFC) is limited by optical saturation, photon-counting statistics, and fragment overlap to approximately 100 fragments
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0b110b8d2bc59100e45b4d4b6dc129d
https://doi.org/10.1021/ac990782i
https://doi.org/10.1021/ac990782i
Publikováno v:
Chemical Reviews. 99:2929-2956
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::def8fc6f4891ad2aa3bb75951c186d81
https://doi.org/10.1021/cr980132z
https://doi.org/10.1021/cr980132z
Publikováno v:
Analytical chemistry. 71(11)
This paper reports the demonstration of efficient single molecule detection in flow cytometry by two-photon fluorescence excitation. We have used two-photon excitation (TPE) to detect single DNA fragments as small as 383 base pairs (bp) labeled with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b0a5808515f8c0cd582326030e0ba38c
https://pubmed.ncbi.nlm.nih.gov/21662745
https://pubmed.ncbi.nlm.nih.gov/21662745
Publikováno v:
Analytical chemistry. 70(7)
We report a multiplex technique for identification of single fluorescent molecules in a flowing sample stream by correlated measurement of single-molecule fluorescence burst size and intraburst fluorescence decay rate. These quantities were measured
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa592889ae17715cc7d13832830bf1e4
https://pubmed.ncbi.nlm.nih.gov/21644740
https://pubmed.ncbi.nlm.nih.gov/21644740
Autor:
Keller Ra, Van Orden A
Publikováno v:
Analytical chemistry. 70(21)
We describe a new technique for performing multicomponent analysis using a combination of capillary electrophoresis (CE) and fluorescence correlation spectroscopy (FCS), which we refer to as CE/FCS. FCS is a highly sensitive and rapid optical techniq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbfc853cbcdb7a7ddf80c8e08f193c34
https://pubmed.ncbi.nlm.nih.gov/21644691
https://pubmed.ncbi.nlm.nih.gov/21644691