Science Highlights

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Simulation of velocity distribution in a 19-pin wire-wrapped fuel bundle, computed using Nek5000 on Argonne Leadership Computing Facility's Intrepid. Image by Paul Fischer.
Meeting highlights applications of Nek5000 simulation code

Thirty researchers from around the world gathered for the first Nek5000 meeting, held at Argonne on December 9 and 10, 2010. The objective was to enable developers and users of Nek5000 to exchange information, address technical issues and share experiences in areas of common interest.

December 12, 2011
The structure of NDM-1 shows the protein’s enlarged active site, which lets it latch onto and disable a broad range of antibiotics.
Decoding the proteins behind drug-resistant superbugs

To create the next line of defense against the most drug-resistant pathogens, scientists have determined the structure of a protein that confers drug resistance against our best antibiotics.

December 11, 2011
Diagrammatic hypothesis of the refined BHJ model for PTB7/fullerene solar cells.
Rethinking the idealized morphology in high-performance organic photovoltaics

Traditionally, organic photovoltaic (OPV) active layers are viewed as an interpenetrating network of pure polymers and fullerenes with discrete interfaces.

December 9, 2011
New Measurement of the Size of the Proton

A recent measurement at JLab of the elastic scattering of electrons on the proton provides a new, high-precision value for the charge radius of the proton.

November 1, 2011
Advanced Heat Transfer Fluids for Concentrated Solar Power (CSP) Applications

The current levelized cost of energy (LCOE) from concentrated solar power (CSP) is ~ $0.11/kWh. The U.S.

November 1, 2011
Improving HPC I/O performance on leadership class supercomputers

On the leadership computers at Argonne National Laboratory, these approaches yield up to 53% improvement in performance over the existing I/O forwarding mechanism and close to

November 1, 2011
Accelerating insights gleaned from leadership-class supercomputing simulations

Argonne computer scientists have devised a software-based approach, called GLEAN, to improve I/O performance on its IBM Blue Gene/P by exploiting the machine's network topology to intelligently agg

November 1, 2011
Creating the Heart of a Planet in the Heart of a Gem

Although materials scientists have theorized for years that a form of super-dense aluminum exists under the extreme pressures found inside a planet's core, no one had ever actually seen it, until n

November 1, 2011
Structure of 2-oxo-3-deoxygalactonate kinase from Klebsiella pneumoniae.
Researchers determine three dimensional structure of galactose metabolic pathway protein

In most organisms, efficient D-galactose utilization is accomplished via a well-studied pathway known as the Leloir pathway.

October 3, 2011
Fig.1. C. moniliferum cell morphology and crystals. (A) Confocal microscopy image showing the prominent lobes of the two chloroplasts (red); cell membrane in green. (B) DIC image of BaSO4 crystals (arrow) in the terminal vacuole; arrowhead indicates a pyrenoid. (C) SEM image of rhombic (arrow) and hexagonal (arrowhead) BaSO4 crystals that remain after cells have been ashed to remove organic material. (D) Illustration showing approximate locations of freeze-fracture cross-sections analyzed by cryo-SEM
How Algae Use a "Sulfate Trap" to Selectively Biomineralize Strontium

Over the years, researchers have looked to a small number of organisms, including the desmid green alga Closterium moniliferum, because of their ability to selectively sequester strontium,

October 1, 2011