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Rietveld refinements   published on Thursday, 04-Jun-09 15:29:29 CEST by Chrysler

A few remarks and questions concerning the Rietveld Refinements: -The fits were done in the range of ~8 to 80 degrees, the peak at ~6° 2Theta was simply left out. For what reason? - The background fitting of the steamed and calcined sample looks horrible to me. This might explain the worse ...

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This is a comment on: J. Nery, Y. Mascarenhas, T. Bonagamba, N. Mello, E. Souzy-Aguiar Location of cerium and lanthanum cations in CeNaY and LaNaY after calcination Zeolites 1997 page 44 volume 18  DOI: 10.1016/S0144-2449(96)00094-2

Comparison missing   published on Friday, 15-May-09 09:14:04 CEST by Crownether

Interesting and good article. What I miss is a comparison between prices. It is pointed out, that the new route using TPA-Br is more cost effective than the use of TPA-OH and Ti-alkoxydes. It is even pointed out in the abstract of the article. So why not give a comparison? Is this to much for ...

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This is a comment on: M. Shibata, Z. Gabelica Synthesis of MFI titanosilicates from methylamine-TPABr media Zeolites 1997 page 246 volume 19  DOI: 10.1016/S0144-2449(97)00078-X

1% carbon fibres?   published on Friday, 15-May-09 08:06:30 CEST by Beta Radiation

A very interesting article; there were so many trying to improve thermal conductivity by adding carbon nano tubes to polymers. Indeed, in numerous publications a slight improvement is observed, but not a big change as mostly wanted. The approach here is different, and it leads to a ...

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This is a comment on: Y. Kim, S. Kamio, T. Tajiri, T. Hayashi, S. Song, M. Endo, M. Terrones, M. Dresselhaus Enhanced thermal conductivity of carbon fibre/phenolic resin composites by the introduction of carbon nanotubes Applied Physics Letters 2007 page 093125 volume 90  DOI: 10.1063/1.2710778

300 Angstrom Pores   published on Friday, 24-Apr-09 12:11:05 CEST by Opal Gilstrap

This article describes pioneer work in the field of mesoporous materials. Today, over 11 Years ago, the so called SBA Materials are some sort of standard materials - at least in the academic field. The synthesis of the Materials using template P123 are very good reproducible. Unfortunately ...

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This is a comment on: Dongyuan Zhao, Jianglin Feng, Qisheng Huo, Nicholas Melosh, Glenn H. Fredrickson, B. F. Chmelka, Galen Stucky Triblock Copolymer Syntheses of Mesoporous Silica with Periodic 50 to 300 Angstrom Pores Science (new York, N.y.) 1998 page 548 volume 279  DOI: 10.1126/science.279.5350.548

Transition-Metal-free Suzuki-Type Coupling Reactions: Scope and Limitations of the Methodology   published on Friday, 24-Apr-09 11:13:52 CEST by NicolasReiser

Nicholas E. Leadbeater claimed in earlier articles transition-metal-free Suzuki-type couplings as the state of the art coupling reaction using watereous conditions free of metal. Indeed would be couplings without catalyst very interesting and the few cases that work are very handy, but it isn't ...

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This is a comment on: Nicholas E. Leadbeater and Maria Marco Transition-Metal-free Suzuki-Type Coupling Reactions: Scope and Limitations of the Methodology The Journal Of Organic Chemistry 2003 page 5660-5667 volume 68  DOI: 10.1021/jo034230i

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