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Record 3 of 360
Lanthanide Complexes as a Test for Evidence of Life
Author and Affiliation:
Benavides, Jeannette(NASA Goddard Space Flight Center, Greenbelt, MD United States)
Abstract: The objective of this research is to advance the understanding of the interaction of lanthanide metals with biological organic molecules and to develop a technique to detect these compounds in the solid state and in situ in Mars and other planetary bodies. The detection of these complexes should provide evidence of life past or present. In addition, detection of the metals alone will provide important information about the geological history of a planetary body. Lanthanides were chosen as our focus of interest because they form very stable complexes with organic molecules in solution and they produce intense luminescence in the ultraviolet and visible spectra. The rare earth complexes available are mostly synthetic for diverse applications in medicine. There is not much work done on the complexes that form in nature. Lanthanides have many applications and they are mined aR over the world, however, since the interest has been only in the elements, the analytical techniques employed destroy any organic ligands that may be present. In order to determine if and which lanthanide complexes form in nature and their concentration, soil samples have been collected from areas rich in soluble lanthanide compounds like phosphates and also rich in vegetation. The soil samples will be analyzed and the lanthanide complexes if present will be isolated and characterized. A spectrometer to detect the lanthanide complexes in situ and in the solid state will be designed. In this workshop, the research approach and its implications will be discussed.
Publication Date: Jan 01, 1998
Document ID:
19990097047
(Acquired Oct 29, 1999)
Subject Category: SPACE BIOLOGY
Document Type: Conference Paper
Meeting Information: Space Geophysics; 3-7 Nov. 1998; San Jose; Costa Rica
Contract/Grant/Task Num: DDF-562274010101
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: RESEARCH; LANTHANUM; PROCEDURES; ORGANIC CHEMISTRY; SOLID STATE; MARS (PLANET); MOLECULES; BIOCHEMISTRY; VEGETATION; ULTRAVIOLET SPECTRA; STABILITY; SPECTROMETERS; SOIL SAMPLING; PHOSPHATES; LUMINESCENCE
Availability Source: Other Sources
Availability Notes: Abstract Only;
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