Contents
Vol 317, Issue 5839
Special Issue
Attosecond Spectroscopy
Introduction to special issue
Reviews
Contents
This Week in Science
Editorial
Editors' Choice
Departments
Products & Materials
News of the Week
ScienceScope
Random Samples
Newsmakers
News Focus
Letters
Books
Policy Forum
Perspectives
Brevia
- Rapid Population Growth of a Critically Endangered Carnivore
Black-footed ferrets released in Wyoming in 1997 now number more than 200, thanks to high initial survival and fertility, factors that may be key to recovery of endangered species.
Reports
- Multifunctional Nanomechanical Systems via Tunably Coupled Piezoelectric Actuation
An applied voltage alters the charge distribution in a semiconductor, allowing for a tunable and highly sensitive deformation response at nanometer scale.
- Label-Free, Single-Molecule Detection with Optical Microcavities
Shifts in the resonance frequency of a microcavity sensor functionalized with receptor molecules can detect the binding of a single molecule.
- Ultrafast Flash Thermal Conductance of Molecular Chains
An ultrafast thermal conductance apparatus shows that heat is transported down long-chain hydrocarbon molecules ballistically at up to 1 kilometer per second.
- Direct Synthesis of Amides from Alcohols and Amines with Liberation of H2
A ruthenium catalyst enables efficient amide synthesis with no need for coupling reagents and minimal generation of by-products.
- Orbital and Millennial Antarctic Climate Variability over the Past 800,000 Years
A deuterium isotope record from an Antarctic ice core shows that during some interglacials, temperatures there were up to 4.5°C warmer than they have been during the Holocene.
- Improved Surface Temperature Prediction for the Coming Decade from a Global Climate Model
Accounting for El Niño events and other natural climate variations substantially improves how well a global climate model forecasts of surface temperatures over the next decade by a global climate model.
- Mechanism of Na+/H+ Antiporting
Molecular dynamics simulations of a Na+/H+ antiporter allow the proposal of an atomically detailed model for the mechanism of ion transport, pH regulation, and cation selectivity.
- Augmented Wnt Signaling in a Mammalian Model of Accelerated Aging
In older mice, overexpression of a signaling pathway may inhibit muscle regeneration by accelerating stem cell senescence while decreasing their proliferation.
- Increased Wnt Signaling During Aging Alters Muscle Stem Cell Fate and Increases Fibrosis
In older mice, overexpression of a signaling pathway may inhibit muscle regeneration by accelerating stem cell senescence while decreasing their proliferation.
- International Conservation Policy Delivers Benefits for Birds in Europe
A European effort to protect endangered bird species initiated in 1979 seems to have increased the populations of targeted species.
- Adaptive Mutations in Bacteria: High Rate and Small Effects
The beneficial mutation rate for bacteria appears to be 1000-fold greater than classical estimates.
- Divergence of Transcription Factor Binding Sites Across Related Yeast Species
In yeast, gene regulatory elements evolve much more rapidly than the genes they control and so may be responsible for much of the diversity among species.
- High-Speed Imaging Reveals Neurophysiological Links to Behavior in an Animal Model of Depression
Neural activity in the hippocampi of rats with depression-like symptoms reflects the degree of abnormal behavior, providing a clue to the brain circuits underlying depression.
- Characterizing the Limits of Human Visual Awareness
Briefly examining a scene visually, humans can pay attention to only one color at a time but may be able to see it in multiple locations.
- Immunization by Avian H5 Influenza Hemagglutinin Mutants with Altered Receptor Binding Specificity
Mutations in a surface protein of the avian flu virus affect how it binds to host cells, information that can help generate protective vaccines for evolving flu viruses.
From the AAAS Office of Publishing and Member Services
