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Lasers and protozoa

Arayan

Arayan

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So i just read that lasers greatly increase algae production in addition to making it glow.
Click to expand...
The organisms used in these tests are ciliated protozoa (eterotrophic protists) and not autotrophic protists like microalgae ;)
BTW lasers can be useful to increase the grow in autotrophic organisms with particular regard to energy savings. The major power loss is caused by the difference between the injected carrier energy and the photon energy. In contrast to the low efficiencies of fluorescent lamps and LEDs, the theoretical thermal dynamic limit of the diode lasers can approach 100%.
 
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Kenom

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My question is, how long of a time frame has to pass before the protozoa shows signs of fluorescence? is it instantaneous after exposure to bluray or is there an amount of time you have to expose the protozoa to in order to get the reaction?

If you were to say quickly pass the laser over the protozoa and only leaving it exposed to the laser for a nanosecond would the effect occur?
 
Arayan

Arayan

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Kenom said:
My question is, how long of a time frame has to pass before the protozoa shows signs of fluorescence? is it instantaneous after exposure to bluray or is there an amount of time you have to expose the protozoa to in order to get the reaction?

If you were to say quickly pass the laser over the protozoa and only leaving it exposed to the laser for a nanosecond would the effect occur?
Click to expand...

I have exposed the organisms for a few seconds (about 5 seconds) and they immediately after, start to be glowing. An instant exposure under the laser did not produced any visible effect.
 
A

Anu

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Arayan said:
The organisms used in these tests are ciliated protozoa (eterotrophic protists) and not autotrophic protists like microalgae ;)
BTW lasers can be useful to increase the grow in autotrophic organisms with particular regard to energy savings. The major power loss is caused by the difference between the injected carrier energy and the photon energy. In contrast to the low efficiencies of fluorescent lamps and LEDs, the theoretical thermal dynamic limit of the diode lasers can approach 100%.
Click to expand...


Very cool, so, you saying that the average 241% increase in algae growth from the lasers in the experiment has to do only with the increased thermal dynamic efficiencies?
 
Arayan

Arayan

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Anu said:
Very cool, so, you saying that the average 241% increase in algae growth from the lasers in the experiment has to do only with the increased thermal dynamic efficiencies?
Click to expand...

I think so but to be sure, we should read the paper...
 
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Anu

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Arayan said:
I think so but to be sure, we should read the paper...
Click to expand...

There's a novel concept. I only posted this here so I wouldn't have to ;)

regardless though, in the interest in creating a small, highly efficient, portable machine that could produce enough energy to sustain a small group of people, I do believe lasers could do quite well.... who's up for a little project?
 
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shintashi

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this reminds me of an old conspiracy about Soviet scientists using special frequency lasers to change the DNA of living organisms. Anu's post reminds me of another conspiracy about a Canadian researcher who made a white beam device for "healing". :thinking:
 
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