Uranium storage mechanisms in wet-dry redox cycled sediments

Uranium redox transition pathways in acetate-amended sediments

Chemistry and Catalysis Division, Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025; Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720; US Geological Survey, Boulder, CO 80303; Environmental Microbiology Laboratory, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland; and Department of Ener...

Comparison of wet and dry corn stover harvest and storage

Corn stover has great potential as a biomass feedstock, but harvest and storage of this material is challenged by weather conditions at harvest; material moisture; and equipment shortcomings. Field drying characteristics, harvest efficiency and rate, product bulk density, and storage characteristics were quantified for stover harvested and stored in wet or dry form. Only in one case did stover ...

Are Dry Mergers Dry, Moist, or Wet?

We present a spectral analysis of a sample of red-sequence galaxies identified by van Dokkum (2005) as dry merger remnants and ongoing dry mergers. Kinematics, stellar population absorption features, and ionisation from emission lines, are derived. We find that approximately half of the sample showing strong tidal features have younger stellar populations than a control sample at a given veloci...

Bacteria in Uranium-Contaminated Sediments Undergoing Bioremediation

A 16S rRNA-targeted tunable bead array was developed and used in a retrospective analysis of metaland sulfate-reducing bacteria in contaminated subsurface sediments undergoing in situ U(VI) bioremediation. Total RNA was extracted from subsurface sediments and interrogated directly, without a PCR step. Bead array validation studies with total RNA derived from 24 isolates indicated that the behav...

Wet and Dry Etching Theory