Facet-Defined Dilute Metal Alloy Nanorods for Efficient Electroreduction of CO to -Propanol.

Electroreduction of CO into liquid fuels is a compelling strategy for storing intermittent renewable energy. Here, we introduce a family of facet-defined dilute copper alloy nanocrystals as catalysts to improve the electrosynthesis of -propanol from CO and HO. We show that substituting a dilute amount of weak-CO-binding metals into the Cu(100) surface improves CO-to--propanol activity and selectivity by modifying the electronic structure of catalysts to facilitate C-C coupling while preserving the (100)-like 4-fold Cu ensembles which favor C-C coupling.

Coordinated repression of pro-differentiation genes via P-bodies and transcription maintains Drosophila intestinal stem cell identity.

The role of processing bodies (P-bodies), key sites of post-transcriptional control, in adult stem cells remains poorly understood. Here, we report that adult Drosophila intestinal stem cells, but not surrounding differentiated cells such as absorptive enterocytes (ECs), harbor P-bodies that contain Drosophila orthologs of mammalian P-body components DDX6, EDC3, EDC4, and LSM14A/B. A targeted RNAi screen in intestinal progenitor cells identified 39 previously known and 64 novel P-body regulators, including Patr-1, a gene necessary for P-body assembly.