Test Molecules and 3-D Electron Orbitals Image 7
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Test Molecules and 3-D Electron Orbitals (Image 7)

November 16, 2012
A graphical representation of the olestra test molecule and its highest-occupied 3-D electron orbital. The molecular structure was calculated by a direct self-consistent-field algorithm rewritten to run on a computer's graphical processing unit (GPU). Positive and negative regions of the electron orbitals are colored blue and orange, respectively. Carbon atoms are aqua, nitrogen atoms are blue, oxygen atoms are red and hydrogen atoms are white. In 2009, Todd Martínez, a professor of chemistry at Stanford University, and graduate student Ivan S. Ufimtsev published information about their National Science Foundation (NSF)-supported study in which they'd rewritten algorithms to run on a computer's GPU rather than the central processing unit (CPU) of a traditional desktop computer. When designing and simulating molecules, computers can spend long periods of time--ranging from days to years--running the complex mathematical equations (or algorithms) used by scientists and engineers to develop more effective drugs, catalysts for fuel cells and other molecular-based materials and applications. The improved method for running algorithms calculated the structures of test molecules up to 650 times faster than the molecular design program called GAMESS running on a computer's CPU. To learn more, see the NSF Discovery story Video Game Technology and Science? [The research on adapting quantum chemistry algorithms for video game architectures, specifically PlayStation2 and PlayStation3, was initially funded by NSF's Division of Materials Research (grant DMR 03-25939). Work aimed at NVIDIA architectures, informed by our PS2 and PS3 efforts, was supported by NSF's Division of Chemistry (grant CHE 06-26354).] (Date of Image: 2008-2009) [Image 7 of 9 related images. See Image 8.] Credit: Ivan S. Ufimtsev, Stanford University; Image created using VMD

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