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grass
grass


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 » almost 3 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 » almost 3 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 » almost 3 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 » over 5 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 » almost 7 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 » almost 7 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 » almost 7 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 » almost 7 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 » almost 7 years ago
dhaffnersr "This is very very cool! I'm looking forward to more of your work. " | Read more » almost 7 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 » almost 7 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 » almost 7 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 » almost 7 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 7 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 8 years ago
WhiteRabbit "Per request, I just now changed the title to something more descriptive. Thanks for your post, Chris. " | Read more » over 8 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 8 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 8 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 8 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 8 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 8 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 8 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 8 years ago
warren "Wow chris the barcode scanner filter idea is great!!! " | Read more » over 8 years ago