3 Matching Results

Search Results

Results: 1 - 3
open access

Atomistic Processes of Catalyst Degradation

Description: The purpose of this cooperative research and development agreement (CRADA) between Sasol North America, Inc., and the oak Ridge National Laboratory (ORNL) was to improve the stability of alumina-based industrial catalysts through the combination of aberration-corrected scanning transmission electron microscopy (STEM) at ORNL and innovative sample preparation techniques at Sasol. Outstanding progress has been made in task 1, 'Atomistic processes of La stabilization'. STEM investigations provided… more
Date: November 27, 2004
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Selective molecular recognition, C-H bond activation, and catalysis in nanoscale reaction vessels

Description: Supramolecular chemistry represents a way to mimic enzyme reactivity by using specially designed container molecules. We have shown that a chiral self-assembled M{sub 4}L{sub 6} supramolecular tetrahedron can encapsulate a variety of cationic guests, with varying degrees of stereoselectivity. Reactive iridium guests can be encapsulated and the C-H bond activation of aldehydes occurs, with the host cavity controlling the ability of substrates to interact with the metal center based upon size and… more
Date: November 27, 2004
Creator: Fiedler, Dorothea; Leung, Dennis H.; Raymond, Kenneth N. & Bergman, Robert G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Beyond Linear Sequence Comparisons: The use of genome-levelcharacters for phylogenetic reconstruction

Description: Although the phylogenetic relationships of many organisms have been convincingly resolved by the comparisons of nucleotide or amino acid sequences, others have remained equivocal despite great effort. Now that large-scale genome sequencing projects are sampling many lineages, it is becoming feasible to compare large data sets of genome-level features and to develop this as a tool for phylogenetic reconstruction that has advantages over conventional sequence comparisons. Although it is unlikely … more
Date: November 27, 2004
Creator: Boore, Jeffrey L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen