Contents
Vol 316, Issue 5826
Contents
This Week in Science
Editorial
Editors' Choice
Products & Materials
News of the Week
ScienceScope
Random Samples
Newsmakers
News Focus
Letters
Books
Policy Forum
Perspectives
Review
Brevia
- Imaging of Single Organic Molecules in Motion
Sequential transmission electron microscopic images allow visualization of the motion of hydrocarbon chains confined within carbon nanotubes.
Research Articles
- Pervasive Seismic Wave Reflectivity and Metasomatism of the Tonga Mantle Wedge
Seismic imaging of a subduction zone reveals nine layers in the mantle overlying the subducting slab, revealing a pattern of reactions produced by ascending fluids.
- Regulation of B Versus T Lymphoid Lineage Fate Decision by the Proto-Oncogene LRF
Developing immune cells become antibody-producing cells through activation of a proto-oncogene that inhibits the alternative developmental pathway.
Reports
- Pairing Without Superfluidity: The Ground State of an Imbalanced Fermi Mixture
Strongly imbalanced populations of fermions can pair up but, unlike balanced populations, do not condense into a superfluid state as temperature approaches 0 kelvin.
- The Process of Tholin Formation in Titan's Upper Atmosphere
Cassini data show that reactions high in the atmosphere of Saturn's moon Titan convert simple organic molecules to massive tholins, which sink to produce its thick haze layers.
- The Orientation of the Local Interstellar Magnetic Field
Modeling the Sun's magnetic field and Voyager data from the solar system's edge imply that the local interstellar magnetic field is misaligned by 60° to 90° from the galactic plane.
- Ultralow Friction of Carbonate Faults Caused by Thermal Decomposition
Experimental faults in carbonate rock weaken dramatically when initial frictional heating creates abundant fine particles that effectively lubricate the sliding interface.
- GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia
Satellite gravity data indicate that the ice sheet covering North America during the Last Glacial Maximum had two large domes, located east and west of Hudson's Bay.
- The Role of Wheat Awns in the Seed Dispersal Unit
The microstructure of hairlike awns on wheat seeds causes them to bend reversibly as humidity changes, propelling the seed along the ground and into the soil surface.
- Positive Regulation of Itk PH Domain Function by Soluble IP4
A kinase phosphorylates the inositol pyrophosphate IP3 to generate IP4 and is necessary for cell signaling during positive selection of immune cells.
- A Common Variant in the FTO Gene Is Associated with Body Mass Index and Predisposes to Childhood and Adult Obesity
A common variant of a gene that increases the risk of obesity by ~67 percent is consistently associated with body mass index in 13 studies involving over 38,000 subjects.
- Bat Flight Generates Complex Aerodynamic Tracks
The wake of small flying bats shows multiple vortices when traced, suggesting that their flight is based on somewhat different principles than that of birds.
- The After-Hours Mutant Reveals a Role for Fbxl3 in Determining Mammalian Circadian Period
Genetic and biochemical screens identify the same protein, which determines period length of the circadian clock by degradation of a known component.
- SCFFbxl3 Controls the Oscillation of the Circadian Clock by Directing the Degradation of Cryptochrome Proteins
Genetic and biochemical screens identify the same protein, which determines period length of the circadian clock by degradation of a known component.
- How the Brain Translates Money into Force: A Neuroimaging Study of Subliminal Motivation
Promise of a reward, even when perceived only subliminally, engages a specific brain region and thereby increases the effort put into a task.
From the AAAS Office of Publishing and Member Services
