orca
orca


Author Comment Last activity Moderation
eustatic "I owe Matej samples. Stevie gave me some brown jars, so i can divide the bulk samples and mail them to him. then, we can zap them independently! S " | Read more » over 6 years ago
warren "Tar Balls over time? Scott, I'd be really interested if you collected a set of a bunch of different tar ball spectra, esp. in different states of ..." | Read more » over 6 years ago
liz "Fantastic and entertaining write-up @eustatic -- thanks all! " | Read more » over 6 years ago
stevie "Awesome Scott! Thanks for posting. What about what we found with the Spec? I could post a follow up note on some of the issues we ran into there, o..." | Read more » almost 8 years ago
eustatic " " | Read more » almost 8 years ago
eustatic "https://farm6.staticflickr.com/5233/14324445688_189d7e59a6_h.jpg I guess it is fluorescing! " | Read more » almost 8 years ago
warren "I think the 405 nm ones may be enough -- this looks like fluorescence just like crude oil, so we'd only be measuring >400nm light anyways. The i..." | Read more » almost 8 years ago
warren "Also why does the laser show more in the coal dust vial? Are you sure it isn't fluorescing? Could you take a clearer photo? " | Read more » almost 8 years ago
warren "Wow, great work. For Grand Isle Coffee 10x (the one where the laser doesn't go all the way through), it looks like you could dilute it further. Or ..." | Read more » almost 8 years ago
mathew "we can source UV lights in the 370nm band-- they're expensive, but not THAT expensive. we might also be able to get some free samples from a manufa..." | Read more » almost 8 years ago
warren "This looks great! Now, the tough part -- detecting enough light to get a spectrum. If you let the sample settle for a few days, does it look more c..." | Read more » almost 9 years ago
warren "Also, i ended up ordering those crude oil samples online: http://publiclab.org/notes/warren/05-03-2013/crude-oil-samples-for-purchase-online I'm h..." | Read more » almost 9 years ago
warren "Hi Scott -- what kind of light are you using? When i've done this, i've let it settle in a clear container so I can see that all the muck has real..." | Read more » almost 9 years ago