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H. Mühe Mc. Candless E. Valenta Utz Wilh Vaubel B. Ahlström O. Aschan J. Kondakow J. Schindelmeiser R. Böhme H. Herzfeld J. E. Teeple R. Adan J. Marcusson Darmois H. Wolff C. Piest R. Marcille EA. Parry M. Adams H. W. Fosse K. Ihnatowzcz 《Analytical and bioanalytical chemistry》1917,56(10-11):541-560
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RD Harris WS Baker Van Stipdonk MJ RM Crooks EA Schweikert 《Rapid communications in mass spectrometry : RCM》1999,13(14):1374-1380
A suite of keV polyatomic or 'cluster' projectiles was used to bombard unoxidized and oxidized self-assembled monolayer surfaces. Negative secondary ion yields, collected at the limit of single ion impacts, were measured and compared for both molecular and fragment ions. In contrast to targets that are orders of magnitude thicker than the penetration range of the primary ions, secondary ion yields from polyatomic projectile impacts on self-assembled monolayers show little to no enhancement when compared with monatomic projectiles at the same velocity. This unusual trend is most likely due to the structural arrangement and bonding characteristics of the monolayer molecules with the Au(111). Copyright 1999 John Wiley & Sons, Ltd. 相似文献
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Aderholz M Aggarwal MM Akbari H Allport PP Badyal SK Ballagh HC Barth M Baton JP Bingham HH Brucker EB Burnstein RA Campbell JR Cence RJ Chatterjee TK Clayton EF Corrigan G Coutures C DeProspo D Devanand De Wolf EA Faulkner PJ Foeth H Fretter WB Gupta VK Hanlon J Harigel G Harris FA Jabiol MA Jacques P Jain V Jones GT Jones MD Kafka T Kalelkar M Kasper P Kohli JM Koller EL Krawiec RJ Lauko M Lys JE Marage P Milburn RH Miller DB Mittra IS Mobayyen MM Moreels J Morrison DR Myatt G Nailor P 《Physical review D: Particles and fields》1992,45(7):2232-2243
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E. M. Volkov E. A. Kubareva V. N. Tashlitskii T. S. Oretskaya 《Chemistry of Natural Compounds》1991,27(5):615-620
Oligodeoxyribonucleotides containing 4-N-(ω-aminohexyl)-5-methyldeoxycytidine have been synthesized. It has been shown that a method of preparation based on the use of a monomeric component containing 4-N-(ω-aminohexyl)-5-methyldeoxycytidine is more reliable and promising than transamination at the level of an oligonucleotide containing 5-methyl-4-triazolyl-6-deoxythymidine. A structure of the monomeric component of oligonucleotide synthesis bearing a hexylamine grouping with trifluoroacetyl protection in the aliphatic amino group has been put forward. The structure of the modified deoxyribonucleotides obtained was confirmed not only by the method of chemical modification, degradation, and exhaustive enzymatic hydrolysis but also by obtaining derivatives at the aliphatic amino group with fluorescein isothiocyanate. 相似文献
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