LASER AND LED PHOTOBIOLOGY

Laser (and LED) therapy is phototherapy.

LED pumped polymer laser sensor for explosives

A very compact explosive vapor sensor is demonstrated based on a distributed feedback polymer laser pumped by a commercial InGaN light-emitting diode. The laser shows a two-stage turn on of the laser emission, for pulsed drive currents above 15.7 A. The 'double-threshold' phenomenon is attributed to the slow rise of the ∼30 ns duration LED pump pulses. The laser emits a 533 nm pulsed output bea...

An Introduction to Photobiology

In this book Yves Le Grand tries to explain how all life, either directly or indirectly, depends upon light for its existence. He points out that it is a very rapid review of a large scientific discipline. It certainly is that. In some 170 pages the author attempts to cover such diverse subjects as the physics of light, vision, and bioluminescence. Although such topics as sunburn, light-influen...

Discovering electrophysiology in photobiology

The mini-review gives special attention to holistic approach and mechanisms of processes. The physical and chemical frames and background for visual perception and signaling are discussed. Perception of photons by retinal rod cells is described in more detail starting from photon absorption and culminating in ion currents. Dark noise and temperature-dependence of photocurrents in photoreceptor ...

Urocanic acid photochemistry and photobiology.

Urocanic acid (2-propenoic acid, 3-[ lH-imidazol-4(5)-yl], UA)? is one of the smallest molecules to have stimulated global interest among biologists, environmentalists, photochemists, photobiologists, medicinal chemists and immunologists. Its history can be traced back more than a century to when it was first found in the urine of dogs (1). Interest in the molecule remained dormant until the mi...