@article {1094,
	title = {AMS Radiocarbon Dating of Large Za Baobabs (Adansonia za) of Madagascar.},
	journal = {PLoS One},
	volume = {11},
	year = {2016},
	month = {2016},
	pages = {e0146977},
	abstract = {<p>The article reports the radiocarbon investigation of Anzapalivoro, the largest za baobab (Adansonia za) specimen of Madagascar and of another za, namely the Big cistern baobab. Several wood samples collected from the large inner cavity and from the outer part/exterior of the tree were investigated by AMS (accelerator mass spectrometry) radiocarbon dating. For samples collected from the cavity walls, the age values increase with the distance into the wood up to a point of maximum age, after which the values decrease toward the outer part. This anomaly of age sequences indicates that the inner cavity of Anzapalivoro is a false cavity, practically an empty space between several fused stems disposed in a ring-shaped structure. The radiocarbon date of the oldest sample was 780 {\textpm} 30 bp, which corresponds to a calibrated age of around 735 yr. Dating results indicate that Anzapalivoro has a closed ring-shaped structure, which consists of 5 fused stems that close a false cavity. The oldest part of the biggest za baobab has a calculated age of 900 years. We also disclose results of the investigation of a second za baobab, the Big cistern baobab, which was hollowed out for water storage. This specimen, which consists of 4 fused stems, was found to be around 260 years old.</p>},
	keywords = {Adansonia, Calibration, Ecology, Forests, Geography, Madagascar, Mass Spectrometry, Radiometric Dating, Time Factors, Trees, Wood},
	issn = {1932-6203},
	doi = {10.1371/journal.pone.0146977},
	author = {Patrut, Adrian and Patrut, Roxana T and Danthu, Pascal and Leong Pock-Tsy, Jean-Michel and Rakosy, Laszlo and Lowy, Daniel A and von Reden, Karl F}
}
@article {1995,
	title = {Impact of vegetation on sedimentary organic matter composition and polycyclic aromatic hydrocarbon attenuation},
	journal = {Environ Sci Technol},
	volume = {39},
	year = {2005},
	note = {Gregory, Samuel TShea, Damian
Guthrie-Nichols, Elizabeth
eng
Research Support, U.S. Gov{\textquoteright}t, Non-P.H.S.
2005/08/09 09:00
Environ Sci Technol. 2005 Jul 15;39(14):5285-92.
},
	month = {Jul 15},
	pages = {5285-92},
	abstract = {Results from natural and engineered phytoremediation systems provide strong evidencethatvegetated soils mitigate polycyclic aromatic hydrocarbon (PAH) contamination. However, the mechanisms by which PAH mitigation occurs and the impact of plant organic matter on PAH attenuation remain unclear. This study assessed the impact of plant organic matter on PAH attenuation in labile and refractory sediments fractions from a petroleum distillate waste pit that has naturally revegetated. Samples were collected in distinct zones of barren and vegetated areas to assess changes to organic matter composition and PAH content as vegetation colonized and became established in the waste pit. Sediments were fractionated into bulk sediment and humin fractions and analyzed for organic matter composition by isotope ratio mass spectrometry (delta (13)C), 13C nuclear magnetic resonance (13C NMR), delta 14C AMS (accelerator mass spectrometry), and percent organic carbon (\%TOC). Gas chromatography mass spectrometry (GC/ MS) of lipid extracts of SOM fractions provided data for PAH distribution histograms, compound weathering ratios, and alkylated and nonalkylated PAH concentrations. Inputs of biogenic plant carbon, PAH weathering, and declines in PAH concentrations are most evidentfor vegetated SOM fractions, particularly humin fractions. Sequestered PAH metabolites were also observed in vegetated humin. These results show that plant organic matter does impact PAH attenuation in both labile and refractory fractions of petroleum distillate waste.},
	keywords = {Biodegradation, Environmental, Environmental Monitoring, Geologic Sediments/chemistry, Magnetic Resonance Spectroscopy, Mass Spectrometry, Plants, Polycyclic Aromatic Hydrocarbons/*isolation \& purification/*metabolism, Refuse Disposal, Soil Pollutants/*isolation \& purification/*metabolism},
	isbn = {0013-936X (Print)0013-936X (Linking)},
	doi = {10.1021/es048028o },
	url = {https://www.ncbi.nlm.nih.gov/pubmed/16082958},
	author = {Gregory, S. T. and Shea, D. and Guthrie-Nichols, E.}
}
@conference {1279,
	title = {An Ocean-Wide DIC-13 Data Set},
	booktitle = {2000 Ocean Sciences Meeting, San Antonio, TX (USA), 24-28 Jan 2000},
	year = {2000},
	note = {Date revised - 2007-04-01SuppNotes - Abstracts available.Last updated - 2016-12-21},
	month = {January 2000},
	publisher = {American Geophysical Union, 2000 Florida Ave., N.W. Washington, DC 20009 USA},
	organization = {American Geophysical Union, 2000 Florida Ave., N.W. Washington, DC 20009 USA},
	abstract = {High quality DIC-13 measurements were made throughout the world{\textquoteright}s oceans at the University of Washington (UW) and the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) Facility during both the OACES and WOCE programs. We are currently merging these two data sets which represent 25000 individual DIC- 13 measurements from 1260 stations. We will present the inter-laboratory calibration and standardization data. Based on 135 measurements on CO2 gas extracted at UW, the mean offset between the two labs is 0.01 o/oo, similar to the offset observed from an exchange of DIC standards (0.012 o/oo). Stations measured by both laboratories will also be examined for offsets, although one comparison in the Indian Ocean shows no significant differences. We will present our progress towards a global atlas of DIC-13, primarily maps of the merged data sets in the Pacific, Southern, and Indian Oceans. In this poster we will concentrate on regions that have been under-sampled in the past, e.g. the Southern Ocean. Additionally, we will examine the relationship of DIC-13 to PO4 and to DIC-14. A preliminary analysis of DIC-13 and PO4 from three WOCE lines in the Pacific indicates that the expected relationship is observed in the deep waters and that the data from different water masses occupy well-defined regions of the graph. We are examining the potential for using the relationship between DIC-14 and DIC-13 to improve our understanding of the penetration of bomb radiocarbon into the ocean as well as fundamental processes in the deep ocean. The relationship is complex yet the data from shallow to intermediate depths (100 to 1000m) follow two distinct parallel lines that are related to the hemisphere in which},
	keywords = {carbon cycling, Carbon dioxide, Deep water, dissolved inorganic carbon, ISW, Indian Ocean, Marine, Mass Spectrometry, Ocean circulation, Phosphates, PS, Antarctic Ocean, Q2 09146:TSD distribution, water masses and circulation, Stable isotopes, Standardization, Water masses, World Ocean, World Ocean Circulation Experiment (WOCE)},
	url = {https://search.proquest.com/docview/19610793?accountid=29119},
	author = {McNichol, A P and Quay, P D and Stuart, D R and Sonnerup, R E and Key, R M}
}
