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Relevant bibliographies by topics / Multi-isotope process monitor

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Academic literature on the topic 'Multi-isotope process monitor'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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Journal articles on the topic "Multi-isotope process monitor"

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Orton, Christopher R., Carlos G. Fraga, Richard N. Christensen, and Jon M. Schwantes. "Proof of concept simulations of the Multi-Isotope Process monitor: An online, nondestructive, near-real-time safeguards monitor for nuclear fuel reprocessing facilities." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 629, no. 1 (2011): 209–19. http://dx.doi.org/10.1016/j.nima.2010.10.024.

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Orton, Christopher R., Carlos G. Fraga, Richard N. Christensen, and Jon M. Schwantes. "Proof of concept experiments of the multi-isotope process monitor: An online, nondestructive, near real-time monitor for spent nuclear fuel reprocessing facilities." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 672 (April 2012): 38–45. http://dx.doi.org/10.1016/j.nima.2011.12.083.

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Pereira, Luciana A., Roberto V. Santos, Marília Hauser, et al. "Commercial traceability of <i>Arapaima</i> spp. fisheries in the Amazon basin: can biogeochemical tags be useful?" Biogeosciences 16, no. 8 (2019): 1781–97. http://dx.doi.org/10.5194/bg-16-1781-2019.

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Abstract. The development of analytical tools to determine the origin of fishes is useful to better understand patterns of habitat use and to monitor, manage, and control fisheries, including certification of food origin. The application of isotopic analyses to study calcified structures of fishes (scales, vertebrae, and otoliths) may provide robust information about the fish geographic origin and environmental living conditions. In this study, we used Sr and C isotopic markers recorded in otoliths of wild and farmed commercialized pirarucu (Arapaima spp.) to evaluate their prediction potential to trace the fishes origin. Wild and farmed fish specimens, as well as food used for feeding pirarucu in captivity, were collected from different sites. Isotope composition of otoliths performed by isotope-ratio mass spectrometry (IRMS; δ13C) and femtosecond laser ablation multi-collector inductively coupled plasma mass spectrometry (LAfs-MC-ICPMS; 87Sr∕86Sr) were compared to the isotopic composition of water and of the food given to the fishes in the farms. Wild fish specimens that lived in environments with the largest fluctuation of river water Sr isotope ratios over time presented the largest Sr isotope variations in otoliths. A quadratic discriminant analysis on otolith isotopic composition provided 58 % of correct classification for fish production (wild and farmed) and 76 % of correct classification for the fish region. Classification accuracy for region varied between 100 % and 29 % for the Madeira and the Lower Amazon fishes, respectively. Overall, this preliminary trial is not yet fully developed to be applied as a commercial traceability tool. However, given the importance of Arapaima spp. for food security and the generation of economic resources for millions of people in the Amazon basin, further analyses are needed to increase the discrimination performance of these biogeographical tags.

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Goodwin, I. D. "Stratigraphic Studies and Surface-Layer Formation. A Case Study: Eastern Wilkes Land, East Antarctica (Abstract)." Annals of Glaciology 11 (1988): 216. http://dx.doi.org/10.1017/s0260305500006790.

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This paper presents the results of a detailed study on the geomorphic and diagenetic processes of surface-layer formation and its subsequent preservation in the stratigraphic record. The study supplemented stratigraphic studies carried out along a 750 km ANARE traverse route along the 69 °S parallel between 112° and 131 °E (which approximately follows the 2000 m contour) in the katabatic wind zone of eastern Wilkes Land. A 100 cane farm was established at GD03 (69 °S, 115°E; 1835 m a.s.l.), adjacent to a 30 m deep firn-core drill site. The cane farm was used to monitor seasonal changes in snow accumulation and the type, size, distribution and orientation of the surface micro-relief. The annual snow accumulation at GD03 is equivalent to 300 kg m−2 of water. This annual layer is visibly marked by a multi-layered ice crust, typically 1–2 mm thick, which is formed in autumn during a hiatus in snow supply. Within the annual layer, single-layered thin ice crusts were observed. These correspond to short hiatus periods, of the order of 2–3 weeks, during late winter–early spring, and radiation glazes formed during summer. Density and oxygen-isotope–depth profiles display annual cyclicity within the snow-pack. Considerable horizontal variation was found in a single annual-layer thickness, with respect to ice-crust thickness, snow-density and oxygen-isotope values, and depth-hoar development, when traced in 21 2 m cores drilled at 5 m horizontal spacing. The observed changes in surface micro-relief distributions over the cane farm have enabled a greater understanding of vertical variations between annual layers observed in the 30 m firn core.

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Sutton, Jill N., Yi-Wei Liu, Justin B. Ries, Maxence Guillermic, Emmanuel Ponzevera та Robert A. Eagle. "<i>δ</i><sup>11</sup>B as monitor of calcification site pH in divergent marine calcifying organisms". Biogeosciences 15, № 5 (2018): 1447–67. http://dx.doi.org/10.5194/bg-15-1447-2018.

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Abstract. The boron isotope composition (δ11B) of marine biogenic carbonates has been predominantly studied as a proxy for monitoring past changes in seawater pH and carbonate chemistry. However, a number of assumptions regarding chemical kinetics and thermodynamic isotope exchange reactions are required to derive seawater pH from δ11B biogenic carbonates. It is also probable that δ11B of biogenic carbonate reflects seawater pH at the organism's site of calcification, which may or may not reflect seawater pH. Here, we report the development of methodology for measuring the δ11B of biogenic carbonate samples at the multi-collector inductively coupled mass spectrometry facility at Ifremer (Plouzané, France) and the evaluation of δ11BCaCO3 in a diverse range of marine calcifying organisms reared for 60 days in isothermal seawater (25 °C) equilibrated with an atmospheric pCO2 of ca. 409 µatm. Average δ11BCaCO3 composition for all species evaluated in this study range from 16.27 to 35.09 ‰, including, in decreasing order, coralline red alga Neogoniolithion sp. (35.89 ± 3.71 ‰), temperate coral Oculina arbuscula (24.12 ± 0.19 ‰), serpulid worm Hydroides crucigera (19.26 ± 0.16 ‰), tropical urchin Eucidaris tribuloides (18.71 ± 0.26 ‰), temperate urchin Arbacia punctulata (16.28 ± 0.86 ‰), and temperate oyster Crassostrea virginica (16.03 ‰). These results are discussed in the context of each species' proposed mechanism of biocalcification and other factors that could influence skeletal and shell δ11B, including calcifying site pH, the proposed direct incorporation of isotopically enriched boric acid (instead of borate) into biogenic calcium carbonate, and differences in shell/skeleton polymorph mineralogy. We conclude that the large inter-species variability in δ11BCaCO3 (ca. 20 ‰) and significant discrepancies between measured δ11BCaCO3 and δ11BCaCO3 expected from established relationships between abiogenic δ11BCaCO3 and seawater pH arise primarily from fundamental differences in calcifying site pH amongst the different species. These results highlight the potential utility of δ11B as a proxy of calcifying site pH for a wide range of calcifying taxa and underscore the importance of using species-specific seawater-pH–δ11BCaCO3 calibrations when reconstructing seawater pH from δ11B of biogenic carbonates.

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Dissertations / Theses on the topic "Multi-isotope process monitor"

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Orton, Christopher Robert. "The Multi-Isotope Process Monitor: Non-destructive, Near-Real-Time Nuclear Safeguards Monitoring at a Reprocessing Facility." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1259101113.

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Schreiber, Samuel Stuart. "Identification of the radionuclides in spent nuclear fuel that may be detected by Compton suppression and gamma-gamma coincidence methods." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-2701.

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The nuclides present in spent nuclear fuel are categorized according to their capacity for detection by Compton suppression or gamma-gamma coincidence methods. The fifty nuclides with the highest activities in spent fuel are identified, their decay schemes analyzed, and the best detection scheme for each is recommended.<br>text

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Reports on the topic "Multi-isotope process monitor"

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Schwantes, Jon M., Christopher R. Orton, Carlos G. Fraga, Richard Christensen, Amy R. Laspe, and Rebecca M. Ward. FY09 PROGRESS: MULTI-ISOTOPE PROCESS (MIP) MONITOR. Office of Scientific and Technical Information (OSTI), 2009. http://dx.doi.org/10.2172/969178.

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Meier, David E., Jamie B. Coble, David V. Jordan, et al. The Multi-Isotope Process (MIP) Monitor Project: FY13 Final Report. Office of Scientific and Technical Information (OSTI), 2013. http://dx.doi.org/10.2172/1168938.

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Orton, Christopher R., Carlos G. Fraga, John W. Hayes, et al. The Multi-Isotope Process Monitor Project: FY11 Progress and Accomplishments. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1060675.

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Coble, Jamie B., Christopher R. Orton, David V. Jordan, et al. The Multi-Isotope Process (MIP) Monitor Project: FY12 Progress and Accomplishments. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1054482.

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Coble, Jamie B., Christopher R. Orton, and Jon M. Schwantes. Automated Characterization of Spent Fuel through the Multi-Isotope Process (MIP) Monitor. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1186985.

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