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Science 9 September 2005:
Vol. 309. no. 5741, p. 1673
DOI: 10.1126/science.309.5741.1673a
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Letters

Letters in This Issue

Letters in This Issue

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[Letter] Women Making Strides in Big Pharma
Catherine D. Strader, Satwant K. Narula, Jean E. Lachowicz
[Letter] The Importance of Origins?
Kamyar Kalantar-Zadeh, Mohammad Navab; Varshasb Broumand, Salomeh Keyhani, Berhooz Broumand. Response Wasim Maziak
[Letter] Firearms, Violence, and Self-Protection
Gary D. Kleck. Response Jeffrey B. Bingenheimer, Robert T. Brennan, Felton J. Earls
[Letter] The Sight of Violence and Violent Action
Narendra G. Mehta
[Letter] Mistakes in a Map
Lei Fu. Response Donald Kennedy
[Letter] Corrections and Clarifications
[Letter] Technical Comment Abstracts


How to Submit a Letter to the Editor


Technical Comment Abstracts

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Comment on "Grain Boundary Decohesion by Impurity Segregation in a Nickel-Sulfur System"
W. T. Geng, J.-S. Wang, G. B. Olson
Abstract: Analysis of the binding energies calculated by Yamaguchi et al. (Reports, 21 Jan. 2005, p. 393) shows that their proposed microstructure of sulfur aggregation at nickel grain boundaries is unrealistic. Our analysis shows that a different configuration of segregated sulfur atoms is more stable and that the grain boundary volume expansion is only half of what was originally proposed.

Full text at www.sciencemag.org/cgi/content/full/309/5741/1677c

 

Response to Comment on "Grain Boundary Decohesion by Impurity Segregation in a Nickel-Sulfur System"
M. Yamaguchi, M. Shiga, H. Kaburaki
Abstract: We estimated the segregation concentration of sulfur atoms at a nickel grain boundary using the average binding energy of sulfur atoms. Geng et al. question our interpretations of the binding energies and suggest that a different configuration of sulfur atoms from the one we proposed is more stable. We show that the two configurations have the same structure and energy.

Full text at www.sciencemag.org/cgi/content/full/309/5741/1677d

 

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Science. ISSN 0036-8075 (print), 1095-9203 (online)