M L Roberts
Biographic Data
| ID | 5529279 |
|---|---|
| NAME | M L Roberts |
| GIVEN NAMES | M L |
| FAMILY NAME | Roberts |
| SIGNATURE | ROBERTS M L |
| AFFILIATIONS | New York University |
| ORCID | 0000-0001-9301-2235 |
| VERIFIED | Yes |
| TOTAL WORKS | 7 |
| TOTAL CITATIONS | 24 |
| WORKS AS AUTHOR | 7 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1992 |
| LATEST PUBLICATION YEAR | 2021 |
| H-INDEX | 3 |
How high frequency food diaries can transform understanding of food security
Globally, around 2 billion people are affected by moderate to severe food insecurity. The linkages from food security through to environmental sustainability are well established, but not yet well measured. This is a critical gap, as it hampers our understanding of how environmental shocks carry through to become consumption shocks to households, communities, or regions; how responses to these shocks (e.g., dietary substitutions) feed back into f…
Single step Production of graphite from organic Samples for Radiocarbon Measurements
We present a new low-cost, high-throughput method for converting many types of organic carbon samples into graphite for radiocarbon ( 14 C) measurements by accelerator mass spectrometry (AMS). The method combines sample combustion and reduction to graphite into a single procedure. In the Single Step method, solid samples are placed directly into Pyrex containing zinc, titanium hydride and iron catalyst. The tube is evacuated, flame sealed, and pl…
The Uncertain Foundation
Journal Article The Uncertain Foundation: France at the Liberation, 1944–1947. By Andrew Knapp Get access The Uncertain Foundation: France at the Liberation, 1944–1947. By Andrew Knapp. New York: Palgrave McMillan. 2007. 263 pp. $94.95. ISBN 978 0 230 52121 6. Mary Louise Roberts Mary Louise Roberts University of Wisconsin-Madison Search for other works by this author on: Oxford Academic Google Scholar French History, Volume 24, Issue 1, March 20…
A High-Performance 14 C Accelerator Mass Spectrometry System
A new and unique radiocarbon accelerator mass spectrometry (AMS) facility has been constructed at the Woods Hole Oceanographic Institution. The defining characteristic of the new system is its large-gap optical elements that provide a larger-than-standard beam acceptance. Such a system is ideally suited for high-throughput, high-precision measurements of 14 C. Details and performance of the new system are presented
A Preliminary Determination of the Absolute 14 C/ 12 C Ratio of OX-I
A preliminary determination of the absolute 14 C/ 12 C ratio of the oxalic acid I standard (NBS SRM 4990B) has been made. Using an accelerator mass spectrometry (AMS) system, a known number of radiocarbon ions were implanted in a thin copper foil. The foil was then combusted with the addition of 14 C-free carrier material. This resulting gas (which had a known 14 C/ 12 C ratio) was graphitized and compared to OX-I material. This comparison yielde…
Chrysalides
Journal Article Chrysalides: Femmes dans la vie privée (XIX–XX siècles), 2 volumes. By Anne-Marie Sohn (Paris: Publications de la Sorbonne, 1996. 1,095pp.) Get access Mary Louise Roberts Mary Louise Roberts Stanford University Search for other works by this author on: Oxford Academic Google Scholar Journal of Social History, Volume 31, Issue 4, Summer 1998, Pages 949–951, https://doi.org/10.1353/jsh/31.4.949 Published: 01 July 1998
Progress in AMS Measurements at the LLNL Spectrometer
We report on the present status of the Lawrence Livermore AMS spectrometer, including sample throughput and progress towards routine 1% measurement capability for 14 C, first results on other isotopes and experience with a multisample high-intensity ion source
A High-Performance 14 C Accelerator Mass Spectrometry System
A new and unique radiocarbon accelerator mass spectrometry (AMS) facility has been constructed at the Woods Hole Oceanographic Institution. The defining characteristic of the new system is its large-gap optical elements that provide a larger-than-standard beam acceptance. Such a system is ideally suited for high-throughput, high-precision measurements of 14 C. Details and performance of the new system are presented
Progress in AMS Measurements at the LLNL Spectrometer
We report on the present status of the Lawrence Livermore AMS spectrometer, including sample throughput and progress towards routine 1% measurement capability for 14 C, first results on other isotopes and experience with a multisample high-intensity ion source
A Preliminary Determination of the Absolute 14 C/ 12 C Ratio of OX-I
A preliminary determination of the absolute 14 C/ 12 C ratio of the oxalic acid I standard (NBS SRM 4990B) has been made. Using an accelerator mass spectrometry (AMS) system, a known number of radiocarbon ions were implanted in a thin copper foil. The foil was then combusted with the addition of 14 C-free carrier material. This resulting gas (which had a known 14 C/ 12 C ratio) was graphitized and compared to OX-I material. This comparison yielde…
Single step Production of graphite from organic Samples for Radiocarbon Measurements
We present a new low-cost, high-throughput method for converting many types of organic carbon samples into graphite for radiocarbon ( 14 C) measurements by accelerator mass spectrometry (AMS). The method combines sample combustion and reduction to graphite into a single procedure. In the Single Step method, solid samples are placed directly into Pyrex containing zinc, titanium hydride and iron catalyst. The tube is evacuated, flame sealed, and pl…
Progress in AMS Measurements at the LLNL Spectrometer
We report on the present status of the Lawrence Livermore AMS spectrometer, including sample throughput and progress towards routine 1% measurement capability for 14 C, first results on other isotopes and experience with a multisample high-intensity ion source
Chrysalides
Journal Article Chrysalides: Femmes dans la vie privée (XIX–XX siècles), 2 volumes. By Anne-Marie Sohn (Paris: Publications de la Sorbonne, 1996. 1,095pp.) Get access Mary Louise Roberts Mary Louise Roberts Stanford University Search for other works by this author on: Oxford Academic Google Scholar Journal of Social History, Volume 31, Issue 4, Summer 1998, Pages 949–951, https://doi.org/10.1353/jsh/31.4.949 Published: 01 July 1998
A Preliminary Determination of the Absolute 14 C/ 12 C Ratio of OX-I
A preliminary determination of the absolute 14 C/ 12 C ratio of the oxalic acid I standard (NBS SRM 4990B) has been made. Using an accelerator mass spectrometry (AMS) system, a known number of radiocarbon ions were implanted in a thin copper foil. The foil was then combusted with the addition of 14 C-free carrier material. This resulting gas (which had a known 14 C/ 12 C ratio) was graphitized and compared to OX-I material. This comparison yielde…
The Uncertain Foundation
Journal Article The Uncertain Foundation: France at the Liberation, 1944–1947. By Andrew Knapp Get access The Uncertain Foundation: France at the Liberation, 1944–1947. By Andrew Knapp. New York: Palgrave McMillan. 2007. 263 pp. $94.95. ISBN 978 0 230 52121 6. Mary Louise Roberts Mary Louise Roberts University of Wisconsin-Madison Search for other works by this author on: Oxford Academic Google Scholar French History, Volume 24, Issue 1, March 20…
A High-Performance 14 C Accelerator Mass Spectrometry System
A new and unique radiocarbon accelerator mass spectrometry (AMS) facility has been constructed at the Woods Hole Oceanographic Institution. The defining characteristic of the new system is its large-gap optical elements that provide a larger-than-standard beam acceptance. Such a system is ideally suited for high-throughput, high-precision measurements of 14 C. Details and performance of the new system are presented
Single step Production of graphite from organic Samples for Radiocarbon Measurements
We present a new low-cost, high-throughput method for converting many types of organic carbon samples into graphite for radiocarbon ( 14 C) measurements by accelerator mass spectrometry (AMS). The method combines sample combustion and reduction to graphite into a single procedure. In the Single Step method, solid samples are placed directly into Pyrex containing zinc, titanium hydride and iron catalyst. The tube is evacuated, flame sealed, and pl…
How high frequency food diaries can transform understanding of food security
Globally, around 2 billion people are affected by moderate to severe food insecurity. The linkages from food security through to environmental sustainability are well established, but not yet well measured. This is a critical gap, as it hampers our understanding of how environmental shocks carry through to become consumption shocks to households, communities, or regions; how responses to these shocks (e.g., dietary substitutions) feed back into f…
Accelerator mass spectrometry (4 works) · Isotope Analysis in Ecology (4 works) · Mass spectrometry (4 works) · Chemistry (3 works) · Radiocarbon dating (3 works) · Radiochemistry (3 works) · Archaeology (2 works) · Carbon fibers (2 works) · Chromatography (2 works) · Engineering (2 works)