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J. F. McGilp M. Cavanagh J. R. Power J. D. O'Mahony 《Applied Physics A: Materials Science & Processing》1994,59(4):401-405
Optical Second-Harmonic Generation (SHG) from semiconductor interfaces has been widely studied, but it is only recently, with the advent of commercial, tuneable, pulsed laser sources that the spectroscopic aspect of SHG has begun to be more widely exploited. Here, results from porous Si and Si(100)-Sb are reported, which illustrate the potential of spectroscopic SHG as a probe of semiconductor interfaces.Paper presented at the 129th Heraeus Seminar on Surface Studies by Nonlinear Laser Spectroscopies, Kassel, Germany, May 30 to June 1, 1994 相似文献
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Georgia Englezou Kristoffer Kortsen Ana A. C. Pacheco Robert Cavanagh Joachim C. Lentz Eduards Krumins Carlos Sanders-Velez Steven M. Howdle Alisyn J. Nedoma Vincenzo Taresco 《Journal of polymer science. Part A, Polymer chemistry》2020,58(11):1571-1581
2-methyltetrahydrofuran (2-MeTHF) is a readily available, inexpensive, neoteric, bio-based solvent. It has been adopted across a wide range of chemical processes including the batch manufacture of fine chemicals, enzymatic polycondensations and ring opening polymerizations. To reduce the environmental burden related to the synthesis of pharmaceutical-grade polymers based on lactide and caprolactone, we envisaged the use of 2-MeTHF. For the first time, we combined a series of metal-free and enzymatic ROPs with free radical and controlled RAFT polymerizations (carried out separately and in tandem) in 2-MeTHF, in order to easily tune the chemistry and the architecture of the final polymers. After a simple purification, the amphiphilic polymers were formulated into nanoparticles and tested for their cytocompatibility in three model cell lines, to assess their application as potential polymeric excipients for nanomedicines. 相似文献
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B. Cavanagh 《Fresenius' Journal of Analytical Chemistry》1929,76(3-4):152-154
Ohne Zusammenfassung 相似文献
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Anti-biofilm agents have been developed based upon the flustramine family of alkaloids isolated from Flustra foliacea. A Garg interrupted Fischer indolization reaction was employed to access a core pyrroloindoline scaffold that was subsequently employed to create a pyrroloindoline triazole amide library. Screening for the ability to modulate biofilm formation against strains of Gram-positive and Gram-negative bacteria identified several compounds with low micromolar, non-toxic IC(50) values. 相似文献
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Bunders CA Minvielle MJ Worthington RJ Ortiz M Cavanagh J Melander C 《Journal of the American Chemical Society》2011,133(50):20160-20163
Indole signaling is one of the putative universal signaling networks in bacteria. We have investigated the use of desformylflustrabromine (dFBr) derivatives for the inhibition of biofilm formation through modulation of the indole-signaling network in Escherichia coli and Staphylococcus aureus . We have found dFBr derivatives that are 10-1000 times more active than indole itself, demonstrating that the flustramine family of indolic natural products represent a privileged scaffold for the design of molecules to control pathogenic bacterial behavior. 相似文献
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Stowers MA van Wuijckhuijse AL Marijnissen JC Scarlett B van Baar BL Kientz CE 《Rapid communications in mass spectrometry : RCM》2000,14(10):829-833
Matrix-assisted laser desorption/ionization (MALDI) mass spectra were obtained from single biological aerosol particles using an aerosol time-of-flight mass spectrometer (ATOFMS). The inlet to the ATOFMS was coupled with an evaporation/condensation flow cell that allowed the aerosol to be coated with matrix material as the sampled stream entered the spectrometer. Mass spectra were generated from aerosol composed either of gramicidin-S or erythromycin, two small biological molecules, or from aerosolised spores of Bacillus subtilis var niger. Three different matrices were used: 3-nitrobenzyl alcohol, picolinic acid and sinapinic acid. A spectrum of gramicidin-S was generated from approximately 250 attomoles of material using a molar ratio of 3-nitrobenzyl alcohol to analyte of approximately 20:1. A single peak, located at 1224 Da, was obtained from the bacterial spores. The washing liquid and extract solution from the spores were analyzed using electrospray mass spectrometry and subsequent MS/MS product ion experiments. This independent analysis suggests that the measured species represents part of the B. subtilis peptidoglycan. The on-line addition of matrix allows quasi-real-time chemical analysis of individual, aerodynamically sized particles, with an overall system residence time of less than 5 seconds. These results suggest that a MALDI-ATOFMS can provide nearly real-time identification of biological aerosols. Copyright 2000 John Wiley & Sons, Ltd. 相似文献
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B. P. Nicolsky V. I. Paramonova A. Stock H. Th. St. Britton C. Naegeli A. Tyabji Soerensen Walbum Ringer J. M. Kolthoff L. V. Wilcox B. Cavanagh B. Diethelm F. Foerster T. Callan J. A. Russell Henderson C. Robinson O. L. Evenson R. H. Nagel D. T. Mc Cutchen J. A. Atanasiu A. I. Verculescu R. R. Ralston C. H. Fellows K. S. Wyatt H. Seltz D. S. Mc Kinney K. Masaki C. del Fresno E. Mairlot E. Jimeno J. Ibarz 《Analytical and bioanalytical chemistry》1932,90(7-8):281-287
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