Ruth Blake Professor Email Me Office: 345 KGL Phone: (203) 432-3191 Fax: (203) 432-3134 A More Detailed Webpage and Publications Research Interests: Biogeochemistry, geomicrobiology, stable isotope geochemistry, astrobiology. Biogeochemical cycling of P, S, Fe and related elements (C, N ); applications to marine, Archean/early earth and extraterrestrial systems; microbe-mineral interactions; evolution of the phosphorus cycle and reduced-P compounds; phosphoenzyme reaction mechanisms. Current Courses: Geomicrobiology 440/540a2004 Environmental Geomicrobiology 255b Chemical Principles in Earth & Environmental Science G&G/EVST160a Astrobiology Fall 2009 Selected Publication(s): Liang, Y. and Blake, R.E. (2008--submitted) Compound- and Enzyme-specific Phosphate Hydrolysis Mechanisms Revealed by 18O:16O of Dissolved Phosphate (Geochimica et Cosmochimica Acta)> Jaisi, D.P., Ji, S., Dong, H., Blake, R.E, Eberl, D.D. and Kim, J. (2008--accepted) Role of Microbial Fe(III) Reduction and Solution Chemistry in Aggregation and Settling of Suspended Particles in the Mississippi River Delta Plain, Louisianna, USA. Clays and ClayMinerals Liang,Y., Blake, R.E., (2007) Oxygen Isotope Fractionation Between Apatite and Dissolved Phosphate 20-45 C. Chemical Geology, 238: 121-133. Liang,Y., Blake, R.E., and Dogru, D. (2007- in review) Oxygen Isotope Signatures of Microbial P Cycling in the Deep Biosphere of Marine Sediments: Peru Margin. Geochimica et Cosmochimica Acta Stout, L.M., Blake, R.E., Greenwood, J.P., Martini, A.M. and Rose, E. (2007-submitted) Geochemical Influences on Microbial Diversity at Volcanic Sulphur Springs of St. Lucia, W.I.. Applied and Environmental Microbiology