This is the fourth volume in the series reviews in Fluorescence. So far, three volumes have been published and received well by the science community c. Many book reviews in the past few years have also noticed positively on the series.

In this fourth volume, we continue to imitate the publication of leading articles in a timely manner by authors from all over the world. We thank the authors for their timely and exciting contributions.

We hope this folder is useful like past sizes, which promise to be quite diverse with glossy content. Finally, in conclusion, I would like to thank Aaron Johnson, who was previously at Springer, for helping me publish this serial book on the last four volumes.

Thank you also for visiting Michael Weston at Springer for help with publishing this current folder. Baltimore, Maryland Chris D.

Geddes v Contents Standard calibration criteria and fluorometry standards ... 1 Ute Resch-Genger, Katrin Hoffmann, Dietmar Pfeifer Membranes and Fluorescence Microscopy ...

33 Luis A. Bagattoli Electronic Energy Transport and Fluorescence Spectroscopy for insight Structure in proteins, normal aggregates of protein and fat systems ...

53? ? Terez Mikkelson, Radek Sachl, Lennart B. Johansson Spectra FRET: The method of transmitting the resonance energy fluorescence in living cells ...

87 Ekaterina A. Bykova and Jie Zheng Boron acid-based fluorescent light sensor units ...

103 John S. Fossey and Tony D.

James Fluorescence Solvent Relaxation in Cationic Membranes ...