Biogeochemistry Core

$265,170P42FY2007ESNIH

Columbia University Health Sciences, New York NY

Investigators

Linked publications & trials

Paper 39297845 Paper 39005241 Paper 38916402 Paper 38728816 Paper 37579572 Paper 37331581 Paper 37034542 Paper 36963713 Paper 36746250 Paper 36668670 Paper 36410482 Paper 36382957 Paper 36134534 Paper 36130227 Paper 36108569 Paper 36070573 Paper 35977585 Paper 35809487 Paper 35691383 Paper 35662741 Paper 35658476 Paper 35404942 Paper 35397220 Paper 35393509 Paper 35350849 Paper 35319962 Paper 35258534 Paper 35229619 Paper 35131582 Paper 34999862 Paper 34955596 Paper 34951307 Paper 34950482 Paper 34739021 Paper 34664721 Paper 34653410 Paper 34625714 Paper 34516978 Paper 34492824 Paper 34426377 Paper 34365318 Paper 34347013 Paper 34243768 Paper 34090890 Paper 33991916 Paper 33958831 Paper 33940044 Paper 33905762 Paper 33855247 Paper 33826413 Paper 33753073 Paper 33750775 Paper 33640655 Paper 33636185 Paper 33632303 Paper 33604397 Paper 33603096 Paper 33593402 Paper 33581093 Paper 33549917 Paper 33476663 Paper 33310320 Paper 33295795 Paper 33242201 Paper 33162565 Paper 33139407 Paper 33137469 Paper 33075355 Paper 32974796 Paper 32918135 Paper 32847913 Paper 32728124 Paper 32641505 Paper 32610666 Paper 32603190 Paper 32585331 Paper 32574193 Paper 32559486 Paper 32535281 Paper 32484362 Paper 32483831 Paper 32449430 Paper 32439775 Paper 32382006 Paper 32230710 Paper 32226911 Paper 32159043 Paper 32069464 Paper 32067593 Paper 32059145 Paper 32018205 Paper 32011595 Paper 31918184 Paper 31918125 Paper 31794002 Paper 31779614 Paper 31760590 Paper 31758285 Paper 31738775 Paper 31703545

Abstract

The Biogeochemistry Core will support geochemical and microbiological measurements on behalf of earth[unreadable] science and environmental engineering Projects 5, 6, and 7 and groundwater analyses for constituents of[unreadable] potential health concern for biomedical Projects 3 and 4. Using a VG Axiom (magnetic sector) High-[unreadable] Resolution Inductively Coupled Plasma-Mass Spectrometer (HR ICP-MS) housed at Lamont-Doherty[unreadable] Observatory, approximately 10,000 samples of groundwater and sediment digests will be analyzed for up to 33 major and[unreadable] trace elements. Existing methods will be refined to determine As concentrations and speciation in the field[unreadable] and in the laboratory. Sediment deposition rates will be determined over a range of time scales using the[unreadable] radioisotopes 14C, 137Cs, and 210Pb.[unreadable] Through collaboration with Dartmouth College and the Universite Paul Cezanne (France), the[unreadable] Biogeochemistry Core will support the spectroscopic characterization of Fe and As mineralogy and[unreadable] speciation for selected sediment samples at various synchrotron facilities. This will include bulk analysis by[unreadable] X-ray Absorption Near-Edge Structure (XANES) and Extended X-ray Absorption Fine-Structure (EXAFS)[unreadable] spectroscopy, as well microbeam X-ray microprobe analysis to determine spatial heterogeneity.[unreadable] The Biogeochemistry Core will also support a concerted effort to identify the microorganisms responsible for[unreadable] mobilizing As in groundwater. This work will be conducted on the Columbia Health Sciences campus and in[unreadable] collaboration with Duquesne University. Using both culture-based on non-culture-based methods, the[unreadable] presence of arsenic-metabolizing bacteria will be determined in selected aquifer material from the U.S. and[unreadable] Bangladesh. The microbial diversity of groundwater and sediment samples will be established using[unreadable] 16srRNA and specific genes, such as the Arr and Ars operon. DMA and RNA Stable Isotope-Probing[unreadable] methods will also be developed.

View original record on NIH RePORTER →