| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| lev29 | "No problem, Liz, but PLEASE do tack on an ADVISORY to that effect in the future! lev29 :smiley: " | Read more » | over 4 years ago | |||
| liz | "hi @lev29 and @mchao2 , thanks for your patience while we test a new feature that each Infragram upload also posts on PublicLab.org! I suspect neit..." | Read more » | over 4 years ago | |||
| lev29 | "mchao2, All that is presented here is a multicolor image and that it was taken by an [aerial] drone. The actual type of image is not provided; is i..." | Read more » | over 4 years ago | |||
| ashishkochaar | "Hope is the best thing when you see that there is no another option I have here to get the things. I hope for the best and expect a little. Like ye..." | Read more » | about 7 years ago | |||
| gpotters | "@cfastie: well, I recall that we made whole leaf spectra in the lab (me = biologist, Ph D of UAntwerp). Guess with a decent light source you can do..." | Read more » | over 8 years ago | |||
| vanjo63 | "I am going to try the experiment with an extraction of grass pigments by ethanol even if I don't think there is a big difference. That will allow t..." | Read more » | over 8 years ago | |||
| cfastie | "I have wondered about how important it is to really extract the plant pigments for this type of absorbance observation. If you had an intact transp..." | Read more » | over 8 years ago | |||
| gpotters | "Maybe you should try to do your extraction with some alcohol. Chlorophylls are, after all, lipophilic and you have to get them out of the chloropla..." | Read more » | over 8 years ago | |||
| cfastie | "I guess you are right about the two peaks. I was thinking that you had captured the lesser peak of Chlorophyll a shown here at about 410 nm: Tha..." | Read more » | over 8 years ago | |||
| dhaffnersr | "This is very very cool! I'm looking forward to more of your work. " | Read more » | over 8 years ago | |||
| vanjo63 | "Oh tank you for this information, I didn't know that was possible to do that via the application Spectral Workbench 2 :) " | Read more » | over 8 years ago | |||
| warren | "This is very cool, thanks for posting! I also wanted to point out that comparisons of this type are possible in Spectral Workbench 2: And so ar..." | Read more » | over 8 years ago | |||
| vanjo63 | "In fact, chlorophyll a has 2 peaks : the first around 430 nm and the second around 660 nm ; while chlorophyll b has also 2 peaks : the first around..." | Read more » | over 8 years ago | |||
| cfastie | "That's a good idea to use only one color of light. It can make it easier to interpret the result. Your result is very consistent with the two peaks..." | Read more » | almost 9 years ago | |||
| pswigert | "Hi! I really enjoyed this thread and seeing everyone's thoughts and responses to the question. @WhiteRabbit , I was wondering if you have any updat..." | Read more » | almost 10 years ago | |||
| WhiteRabbit | "Per request, I just now changed the title to something more descriptive. Thanks for your post, Chris. " | Read more » | over 10 years ago | |||
| warren | "Its a great question and I'd like to star this post but do you think you could change the title to something more descriptive? Thanks! " | Read more » | over 10 years ago | |||
| warren | "Chris's explanation is right on -- the PL kit is great at comparative spectral analysis, but unless you have a light source with an already known s..." | Read more » | over 10 years ago | |||
| cfastie | "The spectral plot of grass that you are interested in replicating is a plot of reflectance. This curve represents a very well known pattern of refl..." | Read more » | over 10 years ago | |||
| WhiteRabbit | "For example, one of the differences, as noted in the comment posted in http://publiclab.org/notes/WhiteRabbit/07-27-2014/question-can-i-use-the-des..." | Read more » | over 10 years ago | |||
| WhiteRabbit | "This isn't my field, but I'll try to frame the question more precisely. For any given wavelength in the plot, there's a magnitude representing its..." | Read more » | over 10 years ago | |||
| warren | "Hi! Could you make the title a bit more specific? What kind of accuracy are you looking for? The spectrometer page lists some of the "specs" -- htt..." | Read more » | over 10 years ago | |||
| WhiteRabbit | "I found this: http://www.vernier.com/products/sensors/col-bta/ which is interesting because unlike other low-cost spectrometers/colorimeters its s..." | Read more » | over 10 years ago | |||
| warren | "Wow chris the barcode scanner filter idea is great!!! " | Read more » | over 10 years ago |