Egg Fluorescence Poster

[Andrea B.]

This is a nice poster from the www.compoundchem.com. The poster is being used under Createive-Commons license with no changes and with attribution. And of course we are a non-commercial website. 

 

No details here about what wavelength of UV induces the protoporphyrin IX fluorescence. And only the most basic explanation of fluorescence. But still cool with that fluorescing red egg.

 

[Kai]

I can use it for educational purposes.
Thank you Andrea :)

[Shane]

Porphyrin is excited by a broad emission wavelength ranging from UV to blue light.

 

[Doug A]

Cool poster @Andrea B..  Helps explain what is going on. Wish I could take one of @Kai's classes, they sound so interesting.

 Thanks for sharing,

Doug A

 

[enricosavazzi]

On 2/19/2023 at 2:30 AM, Andrea B. said:

[...] No details here about what wavelength of UV induces the protoporphyrin IX fluorescence. [...]

Perhaps this helps:

 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4295789/

According to Fig. 3, there is an absorbance peak around 405-410 nm and an emission peak at 635 nm. Most likely the absorbance peak is where the energy enters the system. The emission peak is obviously where it leaves the system (plus any additional emission, see also below), and the difference between the two is the Stokes wavelength shift. Any leftover energy after the Stokes shift may leave the system at higher wavelengths (i.e. additional emission peaks), or ultimately as heat.

 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7254220/

Fig. 1 only shows the same emission peak at 635 nm. Fig. 4 shows a second emission peak at 700 nm, which we could try to record with a VIS-cut, NIR-pass filter with transmission shoulder around 650-680 nm. An interference filter with a sharp shoulder should work, but not our typical absorbance NIR filters with very gradual shoulders.

 

 

[Unscenerie]

This is very interesting.

[Andrea B.]

https://www.ultravioletphotography.com/content/index.php?/search/&q=eggs&quick=1

 

We have several Egg topics here on UVP under the attached linkie.

[Adrian]

Great poster. It is interesting how different species of birds egg fluoresce different colours. Here: from top, chicken, duck and quail.

[colinbm]

Thanks Adrian