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Journal of the Operational Research Society - 相似文献
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Paul C. Beaumont Michael A. J. Rodgers Barry J. Parsons Glyn O. Phillips 《Photochemistry and photobiology》1985,42(5):605-608
Abstract— The yield of singlet oxygen (1 Δg ) from some furocoumarins in the presence of DNA has been measured using time resolved techniques. For both psoralen and 4'-aminomethyl-4,5',8-trimethylpsoralen, increasing DNA concentration leads to a decrease in the yield of singlet oxygen. In addition, there is a linear dependence between the yield of singlet oxygen and the observed triplet yield determined by laser flash photolysis. In view of this observation it seems unlikely that singlet oxygen production occurs from these two furocoumarins when they are complexed with DNA. Preliminary, albeit inconclusive, results for 8-methoxypsoralen are also presented. 相似文献
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Remotely powered distributed microfluidic pumps and mixers based on miniature diodes 总被引:2,自引:0,他引:2
We demonstrate new principles of microfluidic pumping and mixing by electronic components integrated into a microfluidic chip. The miniature diodes embedded into the microchannel walls rectify the voltage induced between their electrodes from an external alternating electric field. The resulting electroosmotic flows, developed in the vicinity of the diode surfaces, were utilized for pumping or mixing of the fluid in the microfluidic channel. The flow velocity of liquid pumped by the diodes facing in the same direction linearly increased with the magnitude of the applied voltage and the pumping direction could be controlled by the pH of the solutions. The transverse flow driven by the localized electroosmotic flux between diodes oriented oppositely on the microchannel was used in microfluidic mixers. The experimental results were interpreted by numerical simulations of the electrohydrodynamic flows. The techniques may be used in novel actively controlled microfluidic-electronic chips. 相似文献
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Chris Beaumont 《The Journal of the Operational Research Society》1982,33(5):495-495
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