Warum fluoreszieren Haie

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horstartur
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Warum fluoreszieren Haie

Beitrag von horstartur » 16 Aug 2019 18:39

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recent scientific breakthrow (July 2019) is the identification of a group of brominated tryptophan-kynurenine small molecule metabolites responsible for the green biofluorescence in two species of sharks and their detection of their structural, antimicrobial, and spectral characterization.
underwater fluorescence during night dives with blue light is of limited interest for most recreational divers. The reasons for this poor interest are different. Several people don't like night dives. Furthermore many do not know what the technique will offer. They are not aware that they could explore a new magic underwater world besides normal night dives with white light.
On the other hand the fluorescence method is a valuable tool in the hand of marine biologist to study the state of coral reefs, i.e. the distribution of different coral species, distinction of dead from living corals and the detection of tiny coral polyps (recruits of a living reef).
A very spectacular approach was the detection of tiny human bone fragments (in a wrack of world war II bomber close to the shore of Croatia and a Roman vessel near a Greek island by a Greek/US-team of professional divers. In both research activities the scientists used our HighPower fluorescence torch. Professional application of our HighEnd fluorescence torch in underwater-Archeology -- my torch is seen from minute 14:00 and from 28:00
https://www.youtube.com/watch?v=s8xVASJl8bw
scientic research with my HighEnd fluorescence torch - search of bones of soldiers in or near the wrack of a bomber in Croatia. The torch can be briefly seen during its use during daytime;minute 1:47 > https://www.youtube.com/watch?v=s8xVASJl8bw

Several fishes show fluorescence when exposed to blue light (450-465 nm). However, this is not attributed to to the GFP (Green Fluorescent Protein, Nobel Price in Chemistry 2008). A recent scientific breakthrow (July 2019) is the identification of a group of brominated tryptophan-kynurenine small molecule metabolites responsible for the green biofluorescence in two species of sharks and their detection of their structural, antimicrobial, and spectral characterization.
> https://www.cell.com/iscience/fulltext/ ... 19)30244-5
Dr. Gruber and coworker used also blue light (around 450 nm) during night dives (similar to our approaches at the coral reef and the Greek/US professional wrack divers with human bones)> see all my YouTube movies with my self-constructed fluorescent torches > https://www.uni-due.de/fluodives/Seiten ... ouTube.HTM
Further information you will find on my homepage (English and German version)> https://www.uni-due.de/fluodives/
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Embryologie, Entwicklungsbiologie, Zoologie, Evolution,Gentechnik, Amphibien, Video (auch UW-Fluoreszenz) , Naturschutz, Galapagos, Seniorkapitän, LeipzigAir http://www.leipzigair.de/
Homepage: http://www.uni-due.de/zoophysiologie/

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