Contents
Vol 313, Issue 5789
Contents
This Week in Science
Editorial
Editors' Choice
NetWatch
Departments
Products & Materials
News of the Week
ScienceScope
Random Samples
Newsmakers
News Focus
Letters
Books
Policy Forum
Perspectives
Review
Brevia
- Pinwheels in the Quintuplet Cluster
The five enigmatic stars in the Quintuplet Cluster in the center of the Milky Way are old, massive binaries with outflowing winds that appear as rotating pinwheels.
Research Articles
- Probing the Faintest Stars in a Globular Star Cluster
Hubble telescope images of a globular star cluster show that the smallest star capable of burning hydrogen is about 0.08 solar masses, consistent with theoretical predictions.
- Warming and Earlier Spring Increase Western U.S. Forest Wildfire Activity
Climate change in the western United States has dramatically increased the number of large forest wildfires during the past 35 years.
- The Molecular Architecture of Axonemes Revealed by Cryoelectron Tomography
The internal structure of the flagellum reveals how its motor enzyme dynein regulates flagellar movement and thus cellular motility.
Reports
- Electronically Induced Atom Motion in Engineered CoCun Nanostructures
Electrons from a scanning tunneling microscope can excite the Cu-Co bond at the end of a chain of copper atoms and cause the cobalt atom to flop rapidly between lattice sites.
- Controlling the Electronic Structure of Bilayer Graphene
Doping one layer of a pair of graphene sheets with excess electrons allows the energy gap between the valence and conduction bands to be controlled, creating tiny switches.
- Two-Dimensional Nematic Colloidal Crystals Self-Assembled by Topological Defects
Colloid particles positioned within ordered liquid crystals using laser tweezers will grow and self-assemble into specific two-dimensional structures.
- Switchable Surfactants
Emulsions in water can be formed on demand by treatment of amidine compounds with CO2 to form surfactants and reversed by exposure to nonpolar gases such as air or argon.
- A Homomolecular Porous Network at a Cu(111) Surface
Competition between attractive hydrogen bonding and repulsive interactions causes anthraquinone to form a network with 50 angstrom pores on a copper (111) surface.
- Evolutionary Paths Underlying Flower Color Variation in Antirrhinum
The genetic differences underlying various color morphs of two snapdragon species can be identified and used to construct their likely evolutionary path.
- Plant Genotypic Diversity Predicts Community Structure and Governs an Ecosystem Process
An increase in the genetic diversity of a dominant plant species in an ecosystem also increased arthropod diversity and net primary productivity.
- p53-Mediated Inhibition of Angiogenesis Through Up-Regulation of a Collagen Prolyl Hydroxylase
A tumor suppressor protein inhibits tumor formation in part by stimulating the production of the body’s own inhibitors of the tumor’s blood supply.
- Mutations That Increase the Life Span of C. elegans Inhibit Tumor Growth
A strain of worm that develops cancer as it ages is protected from tumor growth by mutations that extend its life span.
- Graded Regulation of the Kv2.1 Potassium Channel by Variable Phosphorylation
A proteomic method identifies which seven of the potential phosphorylaton sites are regulated in vivo by a phosphatase in a delayed rectifier potassium channel.
- The Psychological Risks of Vietnam for U.S. Veterans: A Revisit with New Data and Methods
An extensive reanalysis of a previous study of the effects of the Vietnam War on its veterans provides a more reliable estimate of the rate of posttraumatic stress disorder.
Technical Comments
