, 75) for far field direct excitation measurements. The set-up is similar to the one used in ref. 15. Wavelength selection is operated through filters and dichroic mirrors (see the spectral features in Fig.s 1 and 4) The spectral features of the excitation lamp can be also found in ref 15. The fluorescence intensity is recorded by a PCO pixelfly QE USB camera, ADC/14 bit @ 12 MHz) and time lapses are recorded using multi-dimensional acquisition module on Micro-Manager at 4.9 fps, p.40

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