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August 1, 2011 - Volume 89, Number 31
- p. 36
Science & Technology Concentrates
More Science & Technology Concentrates
- Prion’s Multiple Roles
- An electrochemical study suggests one of prion protein’s normal roles may be copper-driven cellular signaling
- New Route To Elusive Perbromate Unveiled
- Smooth synthesis of BrO4– has confounded chemists for generations, but a newfound approach offers a better option
- Water Sentenced To Solitary Confinement In A Carbon Cage
- Japanese researchers have managed to capture a lone water molecule inside a C60 fullerene cage
- Archaea May Be Key Nitrous Oxide Source
- The single-celled organisms, rather than bacteria, appear to make large quantities of the ozone-destroying greenhouse gas
- Injectable Polymer Fixes Tissue Defects
- Rather than grafting tissue or using a molded plastic implant, a light-cured liquid polymer gets the job done
- Fluorescent Labels Color Code RNA
- Genetically encoded labels, previously available only for tagging proteins, are now possible for RNAs
- Imaging Agents Form Toxic Products
- Iodinated chemicals used as contrast agents produce toxic compounds in drinking water treated with disinfectants
- A Double Dose Of Crystal-To-Crystal Transformations
- Rhodium complexes go through two nonreversible solid-state ligand-exchange reactions without loss of crystallinity
Topics Covered
The large quantities of the ozone-destroying greenhouse gas nitrous oxide (N2O) released from Earth’s oceans into the atmosphere may be generated by single-celled archaea, rather than bacteria, scientists report (Science, DOI: 10.1126/science.1208239). Although oceanic bacteria had been thought to produce most of Earth’s marine N2O via oxidation of ammonia and reduction of nitrogen oxides, that idea never jibed with isotopic N2O studies that compared the microbially produced gas with N2O in the atmosphere. Karen L. Casciotti and Alyson E. Santoro of Woods Hole Oceanographic Institution and their colleagues now show that cultures of marine archaea produce N2O via ammonia oxidation. In addition, they found that the isotope ratios of oxygen and nitrogen in the archaea-produced N2O and in atmospheric N2O contributed by the ocean are similar. The results “suggest that ammonia-oxidizing archaea likely play an important role in N2O production in the near-surface ocean,” the researchers write.
- Chemical & Engineering News
- ISSN 0009-2347
- Copyright © 2011 American Chemical Society
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