Session: Microbially Mediated Manganese and Iron Oxidation in the Biosphere


GEOC		Tuesday, March 30, 2004

1:30 PM-5:05 PM Marriott -- Marquis NE, Oral
Microbially Mediated Manganese and Iron Oxidation in the Biosphere
Mn(II) and Fe(II) Oxidation and Ligand Chemistry
Organizers:	John R. Bargar Garrison Sposito Bradley M. Tebo Mario Villalobos
1:30 PM		Introductory Remarks
1:35 PM	74	Rates of Mn(II) oxidation in solutions of inorganic ligands James J. Morgan
2:20 PM	75	Sources and sinks for dissolved Mn^III: The role played by citrate and other biological chelating agents Yun Wang, Alan T. Stone
2:40 PM	76	In vitro oxidation of Mn(II) by Photosynthetic Reaction Centers (PSII): the ²bicarbonate² effect Sergei V. Baranov, Alexei M. Tyryshkin, Jyotishman Dasgupta, Richard K. Watt, Yuri N. Kozlov, A. A. Kazakova, Vyacheslav V. Klimov, Charles Dismukes
3:00 PM	77	Insights into the mechanism of enzymatic manganese(II) oxidation by diverse bacterial species Samuel M. Webb, John R. Bargar, Gregory J. Dick, Hope A. Johnson, James K. McCarthy, B.M. Tebo
3:20 PM		Intermission
3:35 PM	78	Soluble Mn(III) complexes in the suboxic zones of the Black Sea and Chesapeake Bay George W. Luther III, Robert E. Trouwborst, Gregory K. Druschel, Bradley M. Tebo, Samuel M. Webb, Rachael S. Howard
4:10 PM	79	Iron redox processes in siderophore mediated iron transport A. L. Crumbliss, S. Dhungana
4:45 PM	80	Quinone-iron redox biogeochemistry: Thermodynamics, kinetics, and mechanisms Minori Uchimiya, Alan T. Stone

Microbially Mediated Manganese and Iron Oxidation in the Biosphere -- Next Session