The absorption peak for cytochrome c oxidase should be around 670nm and 830nm (I have also seen references to 660nm and 840nm).
Here is one reference that should be interesting to you:Abstract: Currently, light therapies are widely used in both human and veterinarian medicine. The application of light to clinical therapeutics includes: photodynamic therapy, used to kill cancer cells; UVA therapies, used to treat a variety of skin diseases; and photobiomodulation, used to promote cell growth and recovery from injury. Photobiomodulation uses light emitting diodes (LEDs) or low energy lasers, which emit light in the visible red to near infrared range. Light in this range penetrates tissue reasonably well, lacks the carcinogenic/mutagenic properties of UV light, and acts on an endogenous photoreceptor which likely acts to initiate light-altered signaling pathways. Although early studies identified mitochondrial cytochrome c oxidase as an endogenous photoreceptor for photobiomodulation, the cellular and molecular mechanisms underlying photobiomodulation have not been clear. Three recent findings provide important new insight. First, nitric oxide has been implicated. Second, cytochrome c oxidase, an enzyme known to reduce oxygen to water at the end of the mitochondrial respiratory chain, has been shown to have a new enzymatic activity -- the reduction of nitrite to nitric oxide. This nitrite reductase activity is elevated under hypoxic conditions but also occurs under normoxia. And third, low intensity light enhances nitric oxide synthesis by cytochrome c oxidase without altering its ability to reduce oxygen. From these findings, we propose that cytochrome c oxidase functions in photobiomodulation by producing nitric oxide, a signaling molecule which can then function in both intra- and extracellular signaling pathways. We also propose that the effectiveness of photobiomodulation is under the control of tissue oxygen and nitrite levels.
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These studies have demonstrated: (1) that light at 670 nm reverses the ability of tetrototoxin, a sodium channel blocker, to diminish mitochondrial cytochrome c oxidase activity in neuronal cells (Wong-Riley et al., 2001); and (2) that NIR light reverses the toxic effects of methanol on mitochondrial cytochrome c oxidase in rat retinas, resulting in improved vision (Eells et al., 2003). More direct evidence for the involvement of cytochrome c oxidase in photobiomodulation comes from studies on neuronal cell death (Wong-Riley et al., 2005).
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These explanations are applicable under normoxic conditions in which the effective wavelengths (670 nm & 830 nm) for photobiomodulation correspond to the oxidized heme a3 of cytochrome c oxidase, and in which the nitric oxide is produced predominantly by nitric oxide synthase.
So coming back to
Vetrolaser 808nm/200mW. From picture it seems to have 3 diodes. Now the question: is it 3 times 200mW so total output equals 600mW or is it the other way around 200mW is the total output per 3 laser diodes? If the 3 x 200mW calculation is correct I will buy 3 of those:
http://www.ebay.com/...item3ccfd8683a.
Edited by mait, 02 May 2013 - 10:17 PM.