Bradley T. De Gregorio, Planetary Scientist
Cosmochemistry and Astrobiology
ESCG / Jacobs Technology
bradley.t.degregorio@nasa.gov
281-244-0838
Ph.D, Arizona State University, 2006
B.A., Northwestern University, 2001
NRC Research Associate at the Naval Research Laboratory, 2007-2010
Dr. Bradley De Gregorio is a curator and cosmochemist at Johnson Space Center (JSC). He is mainly involved in the curation of cometary and interstellar dust samples returned by the NASA Stardust mission to comet 81P/Wild 2. He is also involved in curation of NASA's portion of asteroidal samples returned by the Japanese Hayabusa Mission to asteroid Itokawa. His research interests focus on the origin, modification, and fate of carbonaceous matter in various planetary materials, through correlated analyses of its nanostructure, organic functional chemistry, and isotopic composition. His other interests include assessing the biogenicity of Archean microbial fossils and other ancient carbonaceous matter, and beam damage effects of polymers and other carbonaceous samples.
- Stardust Curation
- Hayabusa Curation
- Focused Ion Beam
De Gregorio B. T., Stroud R. M., Cody G. D., Nittler L. R., Kilcoyne A. L. D., and Wirick S., Correlated microanalysis of cometary organic grains returned by Stardust, Meteoritics & Planetary Science, vol. 46, 1376-1396, 2011.
De Gregorio B. T., Sharp T. G., Rushdi A. I., and Simoneit B. R. T., Bugs or gunk? Nanoscale methods for assessing the biogenicity of ancient microfossils and organic matter, In: Earliest Life on Earth: Habitats, Environments and Methods of Detection, edited by Golding S. D. and Glikson M., Springer, Dordrecht, Netherlands, pp. 239-289, 2011.
Herd C. D. K., Blinova A., Simkus D. N., Huang Y., Tarozo R., Alexander C. M. O., Gyngard F., Nittler L. R., Cody G. D., Fogel M. L., Kebukawa Y., Kilcoyne A. L. D., Hilts R. W., Slater G. F., Glavin D. P., Dworkin J. P., Callahan M. P., Elsila J. E., De Gregorio B. T., and Stroud R. M, Origin and evolution of prebiotic organic matter as inferred from the Tagish Lake meteorite, Science, vol. 332, 1304 -1307, 2011.
De Gregorio B. T., Stroud R. M., Nittler L. R., Alexander C. M. O., Kilcoyne A. L. D., and Zega T. J., Isotopic anomalies in organic nanoglobules from Comet 81P/Wild 2: Comparison to Murchison nanoglobules and isotopic anomalies induced in terrestrial organics by electron irradiation, Geochimica et Cosmochimica Acta, vol. 74, 4454-4470, 2010.
Sandford S. A., Bajt S., Clemett S. J., Cody G. D., Cooper G., De Gregorio B. T., De Vera V., Dworkin J. P., Elsila J. E., Flynn G. J., Glavin D. P., Lanzirotti A., Limero T., Martin M. P., Snead C. J., Spencer M. K., Stephan T., Westphal A., Wirick S., Zare R. N., and Zolensky M. E, Assessment and control of organic and other contaminants associated with the Stardust sample return from comet 81P/Wild 2, Meteoritics & Planetary Science, vol. 45, 406-433, 2010.