By Leon N. Collignon
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Extra info for Photobiology: Principles, Applications and Effects
Example text
Due to significant differences between the coefficients of local refractory indices, layers of inverted retinal nerve cells can cause a significant direct scattering, distorting the shape of projected images. With the increase of the diameter of the pupil the degree of scattering increases rapidly and the form of the projected image is distorted very quickly. With the diameter of the pupil between 3 and 6 mm the projected regular image acquires the shape of a “noise image” which is similar to the image of a uniform grey background.
Among the first results of the new methods of experimental studies, photoenergic reactions involving bacteriorhodopsin have been described. The first stages of these reactions take place in extremely short time spans of 100-200 femtoseconds. In neurophysiology of vision experimental data were obtained that showed that the quantum of light falls on the photoreceptor and triggers photochemical reactions (rodophsine photoisomeration) in an equally short period of time [8,9]. It was shown [39, 40] that in a sufficiently wide spectral area (400-1100 nm) photo transformation of rodophsine coexists on both channels - coherent and incoherent.
2002). Reconstruction of the acoustic images of dynamic objects located under a non-uniform layer. Acoustical Physics, 48, N 6, 779-789. In: Photobiology: Principles, Applications and Effects ISBN: 978-1-61668-005-3 Editors: L. N. Collignon, C. B. Normand, pp. 39-67 © 2010 Nova Science Publishers, Inc. Chapter 2 PHOTOBIOLOGY OF INFANT SKIN Georgios N. Stamatas1*, M. Catherine Mack2 and Katharine M. Martin2 1 Johnson & Johnson Consumer France. Johnson & Johnson Consumer Worldwide. 2 ABSTRACT The last decades have witnessed great strides in understanding the biological effects of light from the molecular all the way up to the whole organism level.