Abstract: http://www.nature.com/nature/journal/v468/n7324/abs/nature09610.html
Article: http://www.nature.com/nature/journal/v468/n7324/full/nature09610.html

Fluctuating stripes at the onset of the pseudogap in the high-Tc  superconductor Bi2Sr2CaCu2O8+x pp677 - 680
A long-standing question has been the interplay between pseudogap,  which is generic to all hole doped copper oxide superconductors, and  stripes, whose static form occurs in only one family of copper oxides  over a narrow range of the phase diagram. This study reports  observations of the spatial reorganization of electronic states with  the onset of the pseudogap state at T* in the high temperature  superconductor Bi2Sr2CaCu2O8+x using scanning tunnelling microscopy.  The onset of the pseudogap phase coincides with the appearance of  electronic patterns that have the predicted characteristics of  fluctuating stripes. The experiments indicate that stripes are a  consequence of pseudogap behaviour rather than its cause.
Colin V. Parker et al.
doi:10.1038/nature09597
Abstract: http://www.nature.com/nature/journal/v468/n7324/abs/nature09597.html
Article: http://www.nature.com/nature/journal/v468/n7324/full/nature09597.html

The redox state of arc mantle using Zn/Fe systematics pp681 - 685
Here it is shown that the ratio of zinc to total iron content  constrains the valence state of iron in primary arc basalts and their  mantle sources. Primitive arc magmas have identical Zn/FeT ratios (FeT  = Fe2+ + Fe3+) as mid-ocean-ridge basalts, indicating a similar iron  oxidation state of primary mantle melts in arcs and ridges and that  the subduction of oxidized crustal material may not significantly  alter the redox state of the mantle wedge. It is concluded that the  observed higher oxidation states of arc lavas must therefore be, in  part, a consequence of shallow-level differentiation processes.
Cin-Ty A. Lee et al.
doi:10.1038/nature09617
Abstract: http://www.nature.com/nature/journal/v468/n7324/abs/nature09617.html
Article: http://www.nature.com/nature/journal/v468/n7324/full/nature09617.html

A dimorphic pheromone circuit in Drosophila from sensory input to  descending output pp686 - 690
Innate differences between male and female behaviours must be  inscribed in their respective genomes, but how these encode distinct  neuronal circuits remains largely unclear. Focusing on sex specific  responses to the cVA pheromone in fruitflies, a chain of four  successive neurons carrying olfactory signals down to motor centres  has been identified, with all male to female anatomical differences  lying downstream of a conserved sensory cell. The techniques developed  should help others in the task of neuronal circuit mapping, which  remains daunting even for the relatively simple fly brain.
Vanessa Ruta et al.
doi:10.1038/nature09554
Abstract: http://www.nature.com/nature/journal/v468/n7324/abs/nature09554.html
Article: http://www.nature.com/nature/journal/v468/n7324/full/nature09554.html

Acid sensing by the Drosophila olfactory system pp691 - 695
Acid sensing has so far been demonstrated in the gustatory system  only. Now, fruitfly olfactory sensory neurons selectively activated by  acidic compounds have been identified. Acid sensing also requires the  transmembrane protein IR64a, expressed in those neurons as well as  neurons involved in the detection of non acidic odorants. Although the  IR64a protein isn't sufficient by itself to determine acid  recognition, the requirement for IR64a in acid recognition is the  first function for a member of this recently discovered family of  putative odorant receptors — the ionotropic receptor family.

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