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排序方式: 共有311条查询结果,搜索用时 15 毫秒
61.
A model originally developed to simulate crack propagation in viscoplastic materials, where the micromechanism consists of void growth, has been evaluated for both pigmented films and porous compacts of cellulose derivatives. The program allows both visualization of crack growth and the calculation of crack velocity. The program is easy to use, enabling many simulations to be performed with minimum effort. The agreement with experimental observation both qualitatively and quantitatively is very good. 相似文献
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Andrew G. McKillop Roger M. Smith Raymond C. Rowe Stephen A. C. Wren 《Journal of chromatography. A》1995,700(1-2):69-72
A mixture of the Z and E isomers of 2-(3-pentenyl)pyridine has been separated with baseline resolution by capillary electrophoresis. Using molecular modelling it was proposed that the smaller more rapidly migrating peak would be the Z isomer. This agreed with a 38:62 (Z/E) composition by nuclear magnetic resonance spectroscopy. The sample was also investigated by gas chromatography coupled to mass spectrometry. 相似文献
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Wojciechowski J Chase-Baldwin K Wasieloski LP Padilla S Vora GJ Taitt CR 《Analytica chimica acta》2010,679(1-2):85-90
Microarray performance depends upon the ability to screen samples against a vast array of probes with the appropriate sensitivity and selectivity. While these factors are significantly influenced by probe design, they are also subject to the particular detection methodology and reagents employed. Herein we describe the incorporation of super avidin-biotin system (SABS) and secondary enzymatic enhancement (SEE) as post-hybridization signal amplification techniques to improve the sensitivity of oligonucleotide microarrays. To these ends, we tested these methods on electrochemically interrogated arrays using both purified influenza A PCR products and randomly amplified genomic Francisella tularensis DNA as targets. While SABS treatment did not improve sensitivity for CombiMatrix ElectraSense(?) arrays using purified influenza A cDNA, chip sensitivity was improved 10-fold for randomly amplified targets. SEE improved performance to a greater degree and was able to lower the detection limits 10-fold for influenza A and 100-fold for F. tularensis DNA. These results indicate the promising capability of post-hybridization amplification techniques for enhancing microarray performance. 相似文献
67.
The successes of the nuclear shell model in explaining the stability properties of magic nuclei are challenged by the observation of rotational bands for which the sequential filling of single-particle energy levels of the spherical shell model are not respected. This Letter proposes criteria for identifying the shell-model configurations appropriate for describing such bands of states. 相似文献
68.
Stuart D Breedon RE Chinitz LM Ko W Lander RL Rowe J Smith JR Kirk P Cheng CP Gao WX Yan WG Ye MH Abashian A Gotow K Haim D Mattson ME Morgan N Piilonen L Sterner KL Lusin S Rosenfeld C Wang AT Wilson S Zheng LY Fry CA Tanaka R Abe K Fujii Y Kurihara Y Liu F Maki A Nozaki T Omori T Sagawa H Sakai Y Sasaki T Sugimoto Y Takaiwa Y Terada S Walker R Kanda S Olsen SL Ueno K Kajino F Poling R Thomas T Aso T Miyano K Miyata H Oyoshi M Yamashita Y Lee MH Sannes F Schnetzer S Stone R Vinson J Bodek A 《Physical review D: Particles and fields》1994,49(7):3098-3105
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Liu F Chinitz LM Abe K Breedon RE Fujii Y Kurihara Y Maki A Nozaki T Omori T Sagawa H Sakai Y Sasaki T Sugimoto Y Takaiwa Y Terada S Kirk P Cheng CP Gao WX Yan WG Ye MH Abashian A Gotow K Mattson ME Piilonen L Sterner KL Lusin S Rosenfeld C Wilson S Zheng LY Fry CA Tanaka R Ko W Lander RL Rowe J Smith JR Stuart D Kanda S Olsen SL Ueno K Kajino F Poling R Thomas T Aso T Miyano K Miyata H Okubo K Oyoshi M Shirai M Yamashita Y Lee MH Sannes F Schnetzer S Stone R Vinson J Bodek A Kim BJ Kumita T 《Physical review D: Particles and fields》1994,49(9):4339-4347
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