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Sulfur K-edge X-ray Absorption Spectroscopy: Applications, Opportunities and Future Directions in the Biological, Environmental and Chemical Sciences 

October 18, 2000
Stanford Synchrotron Radiation Laboratory, SLAC

Training Center C&D

Organizers: 
Graham George and  Ingrid Pickering (SSRL) 

Sulfur plays essential roles in biology and in the environment. Despite this, its roles are only partially understood because there are few tools for studying this element in situ. X-ray absorption spectroscopy provides a unique method of probing at this important element. 

Applications of the sulfur K-edge spectroscopy in the biological, environmental and chemical sciences will be discussed, and the future of sulfur XAS under
SPEAR3 will be addressed. 

Draft Program

8:30

Continental Breakfast

Session 1

Introduction and Background

Chair: Ingrid Pickering, SSRL

9:00 Welcome and Introduction 
Keith Hodgson, SSRL
9:15 Biological and Environmental Importance of Sulfur
Roger Prince, Exxon
9:45 The Chemistry of Sulfur
Charles Young, Melbourne
10:15 Break

Session 2

Methods

Chair: Scott Fendorf, Stanford

10:30 S K-edge XAS - Experimental Aspects
Britt Hedman, SSRL
11:00 Deconvolution of the Spectra of Mixtures
Graham George, SSRL
11:30 Refining Experimental Chambers for Biological Samples
Karen McFarlane, NAU
12:00 Lunch

Session 3

Biological Sciences

Chair: John Bargar, SSRL

1:00 Ligand K-edge X-ray Absorption Spectroscopy: A Direct Probe of Ligand-Metal Covalency
Thorsten Glaser, Muenster
1:30 Defining Chemical Species in Complex Mixtures Using X-Ray Absorption Spectroscopy: Sulfur in Intact Blood Cells from Ascidia ceratodes 
Patrick Frank, Stanford
2:00 Sulfur XAS of Intact Mammalian Tissues
Eileen Yu, SSRL
2:30 Break

Session 4

Chemical and Environmental Sciences 

Chair: Graham George, SSRL

2:45 Environmentally Influential Reactions and Speciation of Sulfur within Soils and Waters
Scott Fendorf, Stanford
3:15 Sulfur XAS of Environmental Samples
Satish Myneni, Princeton
3:45 Sulfur Crosslinks in Rubber 
Josef Hormes, CAMD
4:15 Break

Session 5

Future Directions

Chair: John Bargar, SSRL 

4:20
 Instrumentation, Beamlines, and Impact of SPEAR3
Tom Rabedeau, SSRL
4:40 Discussion and Future Directions
All

This workshop was supported by the Department of Energy, Offices of Basic Energy Sciences and Biological and Environmental Research and the National Institutes of Health, National Center for Reserach Resources, Biomedical Technology Program.

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Last Update:  26-SEP-2000
Page Content: L. Dunn
Page Editor: L. Dunn