scholarly journals Comparison of Independent Δ14CO2 Records at Point Barrow, Alaska

Radiocarbon ◽  
2013 ◽  
Vol 55 (3) ◽  
pp. 1541-1545 ◽  
Author(s):  
H D Graven ◽  
X Xu ◽  
T P Guilderson ◽  
R F Keeling ◽  
S E Trumbore ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Stable Isotope ◽  
Sample Preparation ◽  
Lawrence Livermore National Laboratory ◽  
National Laboratory ◽  
Isotope Analysis ◽  
The Other ◽  
University Of California ◽  
Significant Bias ◽  
The University

Two independent programs have collected and analyzed atmospheric CO2 samples from Point Barrow, Alaska, for radiocarbon content (Δ14C) over the period 2003–2007. In one program, flask collection, stable isotope analysis, and CO2 extraction are performed by the Scripps Institution of Oceanography's CO2 Program and CO2 is graphitized and measured by accelerator mass spectrometry (AMS) at Lawrence Livermore National Laboratory. In the other program, the University of California, Irvine, performs flask collection, sample preparation, and AMS. Over 22 common sample dates spanning 5 yr, differences in measured Δ14C are consistent with the reported uncertainties and there is no significant bias between the programs.

RADIOCARBON IN MEXICO: FROM PROPORTIONAL COUNTERS TO AMS

Radiocarbon ◽  
2021 ◽  
pp. 1-7
Author(s):  
Corina Solís ◽  
Efraín Chávez ◽  
Arcadio Huerta ◽  
María Esther Ortiz ◽  
Alberto Alcántara ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
High Voltage ◽  
Accelerator Mass Spectrometry ◽  
Science And Technology ◽  
National Council ◽  
University Of Arizona ◽  
Technological Developments ◽  
High Voltage Engineering ◽  
The University

ABSTRACT Augusto Moreno is credited with establishing the first radiocarbon (14C) laboratory in Mexico in the 1950s, however, 14C measurement with the accelerator mass spectrometry (AMS) technique was not achieved in our country until 2003. Douglas Donahue from the University of Arizona, a pioneer in using AMS for 14C dating, participated in that experiment; then, the idea of establishing a 14C AMS laboratory evolved into a feasible project. This was finally reached in 2013, thanks to the technological developments in AMS and sample preparation with automated equipment, and the backing and support of the National Autonomous University of Mexico and the National Council for Science and Technology. The Mexican AMS Laboratory, LEMA, with a compact 1 MV system from High Voltage Engineering Europa, and its sample preparation laboratories with IonPlus automated graphitization equipment, is now a reality.

scholarly journals Measurement of δ18O and δ2H of water and ethanol in wine by Off-Axis Integrated Cavity Output Spectroscopy and Isotope Ratio Mass Spectrometry

2021 ◽  
Author(s):  
Xing Wang ◽  
Henk G. Jansen ◽  
Haico Duin ◽  
Harro A. J. Meijer
Keyword(s):  
Mass Spectrometry ◽  
Isotope Ratio ◽  
Isotope Analysis ◽  
Isotope Ratio Mass Spectrometry ◽  
Growth Conditions ◽  
The Other ◽  
H Nmr ◽  
Cavity Output ◽  
Pre Treatment ◽  
Output Laser

AbstractThere are two officially approved methods for stable isotope analysis for wine authentication. One describes δ18O measurements of the wine water using Isotope Ratio Mass Spectrometry (IRMS), and the other one uses Deuterium-Nuclear Magnetic Resonance (2H-NMR) to measure the deuterium of the wine ethanol. Recently, off-axis integrated cavity output (laser) spectroscopy (OA-ICOS) has become an easier alternative to quantify wine water isotopes, thanks to the spectral contaminant identifier (SCI). We utilized an OA-ICOS analyser with SCI to measure the δ18O and δ2H of water in 27 wine samples without any pre-treatment. The OA-ICOS results reveal a wealth of information about the growth conditions of the wines, which shows the advantages to extend the official δ18O wine water method by δ2H that is obtained easily from OA-ICOS. We also performed high-temperature pyrolysis and chromium reduction combined with IRMS measurements to illustrate the “whole wine” isotope ratios. The δ18O results of OA-ICOS and IRMS show non-significant differences, but the δ2H results of both methods differ much more. As the δ2H difference between these two methods is mainly caused by ethanol, we investigated the possibility to deduce deuterium of wine ethanol from this difference. The results present large uncertainties and deviate from the obtained 2H-NMR results. The deviation is caused by the other constituents in the wine, and the uncertainty is due to the limited precision of the SCI-based correction, which need to improve to obtain the 2H values of ethanol as alternative for the 2H-NMR method.

scholarly journals Up Close: Center for Advanced Materials at Lawrence Berkeley Laboratory

MRS Bulletin ◽  
1986 ◽  
Vol 11 (4) ◽  
pp. 27-27 ◽  
Author(s):  
John J. Gilman
Keyword(s):  
Materials Science ◽  
Magnetic Moments ◽  
National Laboratory ◽  
National Policy ◽  
Chemical Properties ◽  
Educational Process ◽  
University Of California ◽  
Advanced Materials ◽  
Lawrence Berkeley Laboratory ◽  
The University

The boundaries between the present performance of materials and the requirements of device designers have for centuries been moving forward. The steps taken to draw these two together are sometimes large; more often they are small. As they occur, we find materials that are stronger, have larger magnetic moments, have higher electron mobilities, etc. Each time the property profile improves, understanding of the physical and chemical properties advances, and new engineering devices based on the improved profile are invented and developed.The purpose of the Center for Advanced Materials (CAM) at the Lawrence Berkeley Laboratory (LBL) is to enhance the inter-play between advances in the property profiles of materials and advances in the chemical and physical understanding of them. For this purpose, the location of CAM can be described as ideal. The proximity of this national laboratory to the campus of the University of California at Berkeley provides an unusually rich intellectual setting for the Center. It also provides unique opportunities for the University students and faculty who conduct materials-related research. Indeed, the arrangement should be a model for similar organizations, and it represents a solid method for strengthening materials science and technology throughout the nation.National policy in critical materials has given the national laboratories—including LBL—strong direction and incentive to collaborate with industry and the research universities. This incentive led to the establishment of CAM in order to build on the symbiosis between LBL and the University of California at Berkeley. It strives to extend this symbiosis by bringing industry into the ongoing educational process and by making its special facilities more readily available to industrial researchers.

Characterization of Canadian Cigarettes Using Multi-Stable Isotope Analysis by Gas Chromatography−Isotope Ratio Mass Spectrometry

2009 ◽  
Vol 57 (4) ◽  
pp. 1151-1155 ◽  
Author(s):  
Marie-Josée Binette ◽  
Pierre Lafontaine ◽  
Micheline Vanier ◽  
Lay-Keow Ng
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Ratio ◽  
Isotope Analysis ◽  
Isotope Ratio Mass Spectrometry

A Note on Gesualdo's “Sacrae Cantiones” And on Gesualdo and Strawinsky

Tempo ◽  
1957 ◽  
pp. 5-7
Author(s):  
Robert Craft
Keyword(s):  
Los Angeles ◽  
Sacred Music ◽  
The Other ◽  
University Of California ◽  
Don Giovanni ◽  
The University ◽  
Sacred Songs

Illumina nos is the final “sacred song” in a book of twenty printed in Naples by Constantino Vitali and published there in 1603 by Don Giovanni Pietro Cappuccio. It is the only piece in the book requiring seven voices: the others are six-part polyphony. In the same year the same printer and publisher brought out a volume of nineteen five-voice “sacrae cantiones” by Gesualdo. Both of these volumes were marked “Liber Primus,” but if other books were published no copies are known to survive. Then in 1611, Giovanni Jacomo Carlino printed in Naples a book of twenty-six six-voice “Responses” by Gesualdo. These three volumes contain all that is known of Gesualdo's sacred music, and the only known copies of these volumes are in the library of the “Oratorio dei Filippini” at Naples. In 1934 Guido Pannain included fourteen of the five-voice sacred songs in a collection of “La polifonia cinquecentesca ed i primordi del secolo XVII di Napoli.” At this time Pannain discovered that the sextus and bassus parts of the six-voice volume were missing (a catalogue of the “archivio dell” oratorio Filippini” listing all three volumes had been published in Parma in 1918, but apparently no one before Pannain had examined the music). Not until 1955 were photo copies obtainable of the other “sacred songs” and of the “Responses.” Since then Mrs. Ruth Adams of the University of California in Los Angeles has transcribed the five five-voice pieces not published by Pannain, and the whole book of “Responses“ which includes a psalm setting and part of a Tenebrae Service.

scholarly journals Jean-François Saliège (1943–2012)

Radiocarbon ◽  
2012 ◽  
Vol 54 (3-4) ◽  
pp. xi-xiii
Author(s):  
Antoine Zazzo
Keyword(s):  
Mass Spectrometry ◽  
Stable Isotope ◽  
Heart Attack ◽  
Isotope Geochemistry ◽  
Entire Career ◽  
The Creation ◽  
University Of Paris ◽  
Set Up ◽  
The University

Jean-François Saliège passed away on Friday, 1 June 2012, following a heart attack at age 68. Jean-François was born in Chartres and spent his entire career in Paris, a city that he particularly enjoyed. He was hired in 1965 as a junior technician at the Laboratoire de Géologie Dynamique de la Faculté des Sciences de Paris at La Sorbonne University (Director Louis Glangeaud), where he participated in the creation of the radiocarbon and mass spectrometry laboratory under supervision of René Létolle, Jean-Charles Fontes, and Colette Vergnaud-Grazzini. In 1975, he moved to the University of Paris VI and worked more specifically with J-C Fontes in the 14C laboratory as an engineer. In 1981, he helped J-C Fontes to create the Hydrology and Isotope Geochemistry lab at Orsay University. The following year, he returned to the University of Paris VI and joined the team led by Colette Vergnaud-Grazzini at the Laboratoire de Géologie Dynamique, where Jean-François set up the new stable isotope and radiocarbon lab. Between 1990 and 2008, he continued to work at the University of Paris VI at the LODYC lab (Dir. Lilianne Merlivat), then at the LOCEAN lab (Dir. Laurence Eymard) on Catherine Pierre's team.

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