Contents
Vol 315, Issue 5809
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
Review
Brevia
- Haploid Females in the Parasitic Wasp Nasonia vitripennis
Although males in most Hymenoptera (bees, wasps, ants, and certain flies) are haploid and produced from unfertilized eggs, haploid females are found in a parasitic wasp.
Research Article
- Draft Genome Sequence of the Sexually Transmitted Pathogen Trichomonas vaginalis
A common human parasite has an unusually large and repetitive genome that contains many genes originally from bacteria and viruses.
Reports
- Spectropolarimetric Diagnostics of Thermonuclear Supernova Explosions
A survey of supernovae shows that brighter ones have more spherical explosions, constraining the physics of burning and improving their use as standard candles.
- Formation of a Nematic Fluid at High Fields in Sr3Ru2O7
A pronounced anisotropy in resistance associated with a quantum phase transition in strontium ruthenate confirms predictions of a new state of matter--a nematic Fermi liquid.
- Highly Siderophile Element Constraints on Accretion and Differentiation of the Earth-Moon System
Iron-loving elements in the Moon's mantle are 5 percent as abundant as in Earth's mantle, implying that they were replenished less by accretion after the Moon's formation.
- Stabilization of Platinum Oxygen-Reduction Electrocatalysts Using Gold Clusters
Nanoscale gold clusters can inhibit degradation of platinum catalysts during oxygen reduction, potentially enhancing the efficiency of fuel cells.
- Early Upper Paleolithic in Eastern Europe and Implications for the Dispersal of Modern Humans
Dates from an archaeological site on the Don River, Russia, imply that modern humans occupied the central plain of eastern Europe by 45,000 years ago.
- Late Pleistocene Human Skull from Hofmeyr, South Africa, and Modern Human Origins
A skull from South Africa dates to about 35,000 years ago and may represent early modern humans that emigrated from sub-Saharan Africa to populate Europe and Asia.
- Regulation of γδ Versus αß T Lymphocyte Differentiation by the Transcription Factor SOX13
A transcription factor controls the development of immune cells, supporting growth of one of the two major subsets of T cells while opposing differentiation of the other.
- A Systems Approach to Measuring the Binding Energy Landscapes of Transcription Factors
A microfluidic method for measuring low-affinity molecular interactions characterizes transcription factor binding to DNA.
- A Large-Scale Deforestation Experiment: Effects of Patch Area and Isolation on Amazon Birds
As patches of Amazon forest get smaller, they support many fewer species of birds; as they get more isolated, bird species are differentially lost.
- Distinct Populations of Primary and Secondary Effectors During RNAi in C. elegans
In RNA-directed gene silencing in worms, an unanticipated class of small antisense RNAs is synthesized by cellular RNA-directed RNA polymerase.
- Secondary siRNAs Result from Unprimed RNA Synthesis and Form a Distinct Class
In RNA-directed gene silencing in worms, an unanticipated class of small antisense RNAs is synthesized by cellular RNA-directed RNA polymerase.
- Physiological Proteomics of the Uncultured Endosymbiont of Riftia pachyptila
A proteomic survey of an endosymbiotic bacterium from a hydrothermal vent worm reveals its unusual sulfide oxidation and carbon fixation pathways.
- An H-NS-like Stealth Protein Aids Horizontal DNA Transmission in Bacteria
A bacterial gene facilitates horizontal transfer of plasmids to other bacteria by inhibiting the deleterious effects to the recipient's fitness that would otherwise occur.
- Picobiliphytes: A Marine Picoplanktonic Algal Group with Unknown Affinities to Other Eukaryotes
A tiny orange eukaryote has been discovered among the plankton of northern seas.
Technical Comments
