THEODORE, a two-step heating system for the EC/OC determination of radiocarbon (14C) in the environment

Measurements of 14C in the organic carbon (OC) and elemental carbon (EC) fractions, respectively, of fine aerosol particles bear the potential to apportion anthropogenic and biogenic emission sources. For this purpose, the system THEODORE (two-step heating system for the EC/OC determination of radiocarbon in the environment) was developed. In this device, OC and EC are transformed into carbon dioxide in a stream of oxygen at 340 and 650 �C, respectively, and reduced to filamentous carbon. This is the target material for subsequent accelerator mass spectrometry (AMS) 14C measurements, which were performed on sub-milligram carbon samples at the PSI/ETH compact 500 kV AMS system. Quality assurance measurements of SRM 1649a, Urban Dust, yielded a fraction of modern fM in total carbon (TC) of 0.522 ±0.018 (n ¼ 5, 95% confidence level) in agreement with reported values. The results for OC and EC are 0.70± 0.05 (n ¼ 3) and 0.066 ± 0.020 (n ¼ 4), respectively.

Theodore Herzl

Israel Zangwill

Theodore de Mopsuestia, The Commentaries of the Minor Epistle of Paul, Translated with an Introduction by Rowan A. Greer (SBL Writings from the Greco-Roman World, 26). Atlanta GA, Society of Biblical Literature, 2010. ISBN 978-1-58983-279-4, XLIV-839 p.

Fil: Peretó Rivas, Rubén. Consejo Nacional de Investigaciones Científicas y Técnicas

Payment order for Theodore Dehon, 1794 September 26

Handwritten order to John Sale to pay scholarship funds to Theodore Dehon for use by his son Theodore Dehon (Harvard AB 1795), signed by John Clarke, David Tilden, and James Morrill.

Payment order for Theodore Dehon, 1795 July 1

Handwritten order to John Sale to pay scholarship funds to Theodore Dehon for use by his son Theodore Dehon (Harvard AB 1795), signed by John Clarke, David Tilden, and James Morrill.

Ophiuridæ and Astrophytidæ / by Theodore Lyman.

no.1 (1865)

Supplement to the Ophiuridæ and Astrophytidæ / by Theodore Lyman.

no.6 (1871)

Prodromos de uma cruzada.

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